JP5177810B2 - Fuse resistor - Google Patents

Fuse resistor Download PDF

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JP5177810B2
JP5177810B2 JP2007257494A JP2007257494A JP5177810B2 JP 5177810 B2 JP5177810 B2 JP 5177810B2 JP 2007257494 A JP2007257494 A JP 2007257494A JP 2007257494 A JP2007257494 A JP 2007257494A JP 5177810 B2 JP5177810 B2 JP 5177810B2
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Prior art keywords
coil spring
resistance element
hole
lead wire
coil
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JP2009087813A (en
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正憲 北原
幹男 辰口
浩一 平沢
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Koa Corp
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Koa Corp
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Priority to JP2007257494A priority Critical patent/JP5177810B2/en
Priority to PCT/JP2008/066714 priority patent/WO2009044631A1/en
Priority to CN200880109793.3A priority patent/CN101816058B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/01—Mounting; Supporting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/048—Fuse resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/36—Means for applying mechanical tension to fusible member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts

Description

本発明は、電気回路における過電流に対する保護素子として用いられるヒューズ抵抗器に関するものである。   The present invention relates to a fuse resistor used as a protection element against an overcurrent in an electric circuit.

ヒューズ抵抗器は、産業用電気機器や民生用電気器における熱的な異常を検出して、その回路を遮断するために用いられているものであり、抵抗素子と温度ヒューズ素子とが回路的に直列に接続されているとともに、抵抗素子の熱が温度ヒューズ素子に伝導されるように構成されている。   Fuse resistors are used to detect thermal abnormalities in industrial electrical appliances and consumer electronics, and to shut down the circuit. The resistor elements are connected in series, and the heat of the resistance element is conducted to the thermal fuse element.

図５は、従来のヒューズ抵抗器の構造の説明図である。図中、１１は抵抗素子、１２ａ，１２ｂはキャップ部、１３ａ，１３ｂはリード線、１４は温度ヒューズ、１４ａ，１４ｂはリード線、１５はケースである。   FIG. 5 is an explanatory diagram of the structure of a conventional fuse resistor. In the figure, 11 is a resistance element, 12a and 12b are cap parts, 13a and 13b are lead wires, 14 is a thermal fuse, 14a and 14b are lead wires, and 15 is a case.

抵抗素子１１は、例えば巻線抵抗器であり、リード線１３ａ，１３ｂが取り付けられたキャップ部１２ａ，１２ｂが両端部に取り付けられている。一方のリード線１３ｂに温度ヒューズ１４の一方のリード線１４ｂが溶接され、抵抗１１の他方のリード線１３ａと温度ヒューズ１４の他方のリード線１４ａが端子部となるようにケース１５に収納され、図示しない封入剤で封入されている。このヒューズ抵抗器の組立は、ケース１５の下部に設けられた一方の取付孔に抵抗素子１１の一方のリード線１３ａを挿入し、他方の取付孔に温度ヒューズ１４の一方のリード線１４ａを挿入して、抵抗素子１１と温度ヒューズ１４とを並ぶように配置する。抵抗素子１１の他方のリード線１３ｂと温度ヒューズ１４の他方のリード線１４ｂとを溶接した後、ケース１５内の空間に図示しない封入剤を充填して組み立てられる。抵抗素子１１で発生する異常電流による発熱は、封入剤を介して温度ヒューズ１４に伝導され、温度ヒューズ１４が断となり、ヒューズ抵抗器を挿入した回路が遮断される。   The resistance element 11 is, for example, a winding resistor, and cap portions 12a and 12b to which lead wires 13a and 13b are attached are attached to both ends. One lead wire 14b of the thermal fuse 14 is welded to one lead wire 13b, and the other lead wire 13a of the resistor 11 and the other lead wire 14a of the thermal fuse 14 are accommodated in the case 15 so as to be a terminal portion. It is encapsulated with an encapsulant (not shown). In assembling the fuse resistor, one lead wire 13a of the resistance element 11 is inserted into one attachment hole provided in the lower portion of the case 15, and one lead wire 14a of the thermal fuse 14 is inserted into the other attachment hole. Thus, the resistance element 11 and the thermal fuse 14 are arranged in a line. After the other lead wire 13b of the resistance element 11 and the other lead wire 14b of the thermal fuse 14 are welded, a space in the case 15 is filled with an encapsulant (not shown) and assembled. Heat generated by the abnormal current generated in the resistance element 11 is conducted to the thermal fuse 14 via the encapsulant, the thermal fuse 14 is cut off, and the circuit in which the fuse resistor is inserted is cut off.

このヒューズ抵抗器は、小型で安価であることから、用途としては、ＡＣアダプタなどのＡＣ電源に多く使用されている。しかしながら、抵抗素子１１の自己発熱を封入剤を介して間接的に温度ヒューズ１４へ与えて溶断させるために、抵抗素子１１の表面温度が非常に高温になるという問題がある。また、温度ヒューズ１４が溶断されて開回路になったかどうかの外観上の見分けがつかないという問題もある。   Since this fuse resistor is small and inexpensive, it is widely used as an AC power source such as an AC adapter. However, since the self-heating of the resistance element 11 is indirectly given to the thermal fuse 14 via the encapsulant and blown, there is a problem that the surface temperature of the resistance element 11 becomes very high. There is also a problem in that it is difficult to tell whether the thermal fuse 14 is blown to form an open circuit.

特許文献１に記載されたヒューズ抵抗器では、上記の外観上の見分けの問題の解決に着目して、第１，第２のリード線を有し第２のリード線を形状記憶合金により構成した抵抗素子をケース内に収納するとともに、第２のリード線に接触する第３のリード線をケースにより保持して配設し、第２のリード線と第３のリード線とは、形状記憶合金の原形復帰温度未満で接触するとともに原形復帰温度以上で離れ、かつ接触部分が外部から目視可能なように配設したものである。   In the fuse resistor described in Patent Document 1, paying attention to solving the above-mentioned problem of distinguishing the appearance, the first and second lead wires are provided, and the second lead wire is formed of a shape memory alloy. The resistance element is accommodated in the case, and the third lead wire contacting the second lead wire is held and arranged by the case. The second lead wire and the third lead wire are formed of a shape memory alloy. The contact is made at a temperature lower than the original restoration temperature, is separated from the original restoration temperature or more, and the contact portion is disposed so as to be visible from the outside.

しかし、接点となる第２のリード線と第３のリード線との接触部分の接触圧を一定にすることが困難な構造であり、また、その接触圧で接触した状態で導通がなされていることから、リード線の酸化等の表面状態の変化により、導通状態が不安定となる。さらに、速動性にも問題がある。
実願昭６３−５６５８号（実開平１−１１０４０１号）のマイクロフィルム However, it is difficult to make the contact pressure of the contact portion between the second lead wire and the third lead wire that are contact points constant, and conduction is made in a state of contact with the contact pressure. Therefore, the conduction state becomes unstable due to a change in the surface state such as oxidation of the lead wire. In addition, there is a problem with rapidity.
Microfilm of Japanese Utility Model No. 63-5658 (Japanese Utility Model Laid-Open No. 1-110401)

本発明は、上述した事情に鑑みてなされたもので、ばねの蓄勢力を利用して速動性を向上できるとともに、組立の際にばね力を一定にすることができ、保護効果も十分なヒューズ抵抗器を提供することを目的とするものである。 The present invention has been made in view of the above-described circumstances, and it is possible to improve the quick-movability by using the stored energy of the spring, to make the spring force constant during assembly, and to provide a sufficient protection effect. It is an object to provide a simple fuse resistor.

本発明は、両端に導電性のキャップ部を有し前記両端の導電性のキャップ部に接続された抵抗体を有する抵抗素子と、コイル部とその両端に延びるアーム部を有するコイルばねと、絶縁性基板とを有し、前記抵抗素子の一方のキャップ部に接続されたリード線を一方の端子とし、前記コイルばねの一方のアーム部を他方の端子とするヒューズ抵抗器であって、前記絶縁性基板には、前記リード線を挿通できる第１の貫通孔が設けられているとともに、前記コイル部の少なくとも一部を挿入するための第１の凹部と前記コイルばねの前記一方のアーム部を挿通できる第２の貫通孔が設けられており、前記第１の凹部は、前記第２の貫通孔に対して偏った位置に形成されており、前記抵抗素子は、前記リード線が前記第１の貫通孔に挿通されて前記一方のキャップ部側が前記絶縁性基板に固定されており、前記コイルばねは、前記コイル部の少なくとも一部が前記第１の凹部に挿入され、かつ、前記一方のアーム部が前記第２の貫通孔に挿通されており、前記コイルばねの他方のアーム部が前記コイルばねに蓄勢力を生じるように前記抵抗素子の他方のキャップ部に低融点金属により固定されており、前記コイルばねは、前記第２の貫通孔によってその取付位置が規制され、前記第１の凹部によってその取付方向が規制されていることを特徴とするものである。 The present invention includes a resistance element having a conductive cap portion at both ends and a resistor connected to the conductive cap portions at both ends, a coil spring having a coil portion and arm portions extending from both ends, and insulation. A fuse resistor having a lead wire connected to one cap portion of the resistor element as one terminal and one arm portion of the coil spring as the other terminal, The conductive substrate is provided with a first through hole into which the lead wire can be inserted, and a first recess for inserting at least a part of the coil portion and the one arm portion of the coil spring. A second through-hole that can be inserted is provided, the first recess is formed at a position biased with respect to the second through-hole, and the lead wire is the first lead. Before being inserted through the through hole One cap part side is fixed to the insulating substrate, and the coil spring has at least a part of the coil part inserted into the first recess, and the one arm part penetrates the second penetration. The other arm portion of the coil spring is fixed to the other cap portion of the resistance element with a low melting point metal so that an accumulating force is generated in the coil spring, and the coil spring is The attachment position is regulated by the second through hole, and the attachment direction is regulated by the first recess.

また、本発明は、両端に導電性のキャップ部を有し前記両端の導電性のキャップ部に接続された抵抗体を有する抵抗素子と、コイル部とその両端に延びるアーム部を有するコイルばねと、絶縁性基板とを有し、前記抵抗素子の一方のキャップ部に接続されたリード線を一方の端子とし、前記コイルばねの一方のアーム部を他方の端子とするヒューズ抵抗器であって、前記絶縁性基板には、前記リード線を挿通できる第１の貫通孔が設けられているとともに、前記コイル部の少なくとも一部を挿入するための第１の凹部と前記コイルばねの前記一方のアーム部を挿通できる第２の貫通孔が設けられており、前記第１の凹部は、前記第２の貫通孔に対して偏った位置に形成されており、前記抵抗素子は、前記リード線が前記第１の貫通孔に挿通されて前記一方のキャップ部側が前記絶縁性基板に固定されており、前記コイルばねは、前記コイル部の少なくとも一部が前記第１の凹部に挿入され、かつ、前記一方のアーム部が前記第２の貫通孔に挿通されており、前記コイルばねの他方のアーム部が前記コイルばねに蓄勢力を生じるように前記抵抗素子の他方のキャップ部に接続されたリード線に低融点金属により固定されており、前記コイルばねは、前記第２の貫通孔によってその取付位置が規制され、前記第１の凹部によってその取付方向が規制されていることを特徴とするものである。 The present invention also provides a resistance element having a conductive cap portion at both ends and having a resistor connected to the conductive cap portions at both ends, a coil spring having a coil portion and arm portions extending at both ends thereof. A fuse resistor having an insulating substrate, a lead wire connected to one cap portion of the resistance element as one terminal, and one arm portion of the coil spring as the other terminal, The insulating substrate is provided with a first through hole into which the lead wire can be inserted, and a first recess for inserting at least a part of the coil portion and the one arm of the coil spring. A second through-hole through which the first through-hole can be inserted, the first recess is formed at a position biased with respect to the second through-hole, and the resistance element includes the lead wire Inserted through the first through hole The one cap part side is fixed to the insulating substrate, the coil spring has at least a part of the coil part inserted into the first recess, and the one arm part is the second part. The other arm portion of the coil spring is fixed to a lead wire connected to the other cap portion of the resistance element with a low melting point metal so that an accumulating force is generated in the coil spring. The attachment position of the coil spring is restricted by the second through hole, and the attachment direction is restricted by the first recess.

本発明によれば、他方のアーム部にコイルばねの蓄勢力によって生じる付勢力が与えられているので、速動性を向上できるとともに、コイルばねの取付位置と取付方向が規制されるので、組立の際にばね力を一定にすることができる。また、コイルばねは、他方のアーム部が、絶縁性基板に固定された抵抗素子の他方のキャップ部、あるいは、他方のキャップ部に接続されたリード線に固定されるので、ヒューズ抵抗器の取付の際に端子である一方のアーム部に力が加えられても、軸方向の移動を阻止できるという効果がある。   According to the present invention, since the urging force generated by the accumulating force of the coil spring is given to the other arm portion, it is possible to improve the quick-movability and to restrict the attachment position and the attachment direction of the coil spring. The spring force can be kept constant during assembly. In addition, since the other arm portion of the coil spring is fixed to the other cap portion of the resistance element fixed to the insulating substrate or the lead wire connected to the other cap portion, the fuse resistor is attached. Even if a force is applied to one arm portion which is a terminal at this time, the movement in the axial direction can be prevented.

図１は、本発明のヒューズ抵抗器の第１の実施例の概略の構造を説明するためのもので、図１（Ａ）は正面図、図１（Ｂ）はＡ−Ａ線断面図、図１（Ｃ）はＢ−Ｂ線断面図である。図中、１は抵抗素子、２ａ，２ｂはキャップ部、３ａはリード線、４はコイルばね、４ａ，４ｂはアーム部、４ｃはコイル部、５は絶縁性基板、５ａ，５ｂは凹部、６は低融点金属、７はケースである。   FIG. 1 is a diagram for explaining a schematic structure of a first embodiment of a fuse resistor according to the present invention. FIG. 1 (A) is a front view, FIG. 1 (B) is a cross-sectional view taken along line AA, FIG. 1C is a cross-sectional view taken along line BB. In the figure, 1 is a resistance element, 2a and 2b are cap portions, 3a is a lead wire, 4 is a coil spring, 4a and 4b are arm portions, 4c is a coil portion, 5 is an insulating substrate, 5a and 5b are concave portions, 6 Is a low melting point metal and 7 is a case.

抵抗素子１は、この例では、円筒形のセラミックやガラスを絶縁性基体として、両端に導電性金属のキャップ部２ａ，２ｂが取り付けられ、ＮｉＣｒ等の抵抗線が螺旋状に巻かれ、抵抗線の両端は、キャップ部２ａ，２ｂに溶接されたものである。この溶接に用いられる金属の融点は、低融点金属６の融点よりも高い値である。キャップ部２ａには、リード線３ａが取り付けられるが、リード線付のキャップを用いてもよい。リード線付のキャップを用いる場合は、キャップ部２ｂ側にはリード線は不要であるので、リード線を切り落としてもよい。抵抗素子１の表面には絶縁コートが施されているが、必ずしも絶縁コートは必要ない。   In this example, the resistance element 1 is made of a cylindrical ceramic or glass as an insulating base, and caps 2a and 2b made of conductive metal are attached to both ends, and a resistance wire such as NiCr is spirally wound. Both ends are welded to the cap portions 2a and 2b. The melting point of the metal used for this welding is higher than the melting point of the low melting point metal 6. The lead wire 3a is attached to the cap portion 2a, but a cap with a lead wire may be used. When using a cap with a lead wire, the lead wire is not necessary on the cap portion 2b side, and the lead wire may be cut off. Although the surface of the resistance element 1 is provided with an insulating coat, the insulating coat is not necessarily required.

この実施例では、抵抗素子として巻線抵抗器を用いたが、本発明の抵抗素子は巻線抵抗器に限られるものではなく、酸化金属等の被膜抵抗器や、セメント抵抗器等、適宜の抵抗器が用いられる。被膜抵抗器の場合は、絶縁性基体に被膜抵抗を形成した後に、両端部にキャップ部を被せることによって、キャップ部が抵抗体に接続される。   In this embodiment, a winding resistor is used as the resistance element. However, the resistance element of the present invention is not limited to the winding resistor, and a suitable film resistor such as a film resistor such as metal oxide or a cement resistor may be used. A resistor is used. In the case of a film resistor, after the film resistance is formed on the insulating substrate, the cap part is connected to the resistor by covering the both ends with the cap part.

コイルばね４は、燐青銅等のばね性を有するワイヤを用いて、一部をコイル状に巻いて形成したコイル部４ｃの両側にアーム部４ａ，４ｂをやや長めに残してしておく。一方のアーム部４ａが接続用の足となり、他方のアーム部４ｂが後述するように、キャップ部２ｂに接続されるから、アーム部４ａ，４ｂには、そのための長さが必要である。コイル部４ｃは、１回または複数回巻かれる。このコイルばねは、ワイヤの曲げによるばね性を利用するので、コイル部４ｃの巻数が多いほどばね定数は小さくなるから、巻数によってばね定数を設定できる。なお、アーム部４ａ，４ｂは、コイルばねのコイル部４ｃから延長されて形成されているが、アーム部４ａ，４ｂを別部材で形成して、コイル部４ｃに接続してもよい。   The coil spring 4 uses a wire having a spring property such as phosphor bronze, and the arm portions 4a and 4b are left slightly longer on both sides of a coil portion 4c formed by winding a part thereof in a coil shape. Since one arm portion 4a serves as a connecting foot and the other arm portion 4b is connected to the cap portion 2b as will be described later, the arm portions 4a and 4b need a length for that purpose. The coil part 4c is wound once or a plurality of times. Since this coil spring uses the spring property due to the bending of the wire, the spring constant decreases as the number of turns of the coil portion 4c increases. Therefore, the spring constant can be set by the number of turns. In addition, although the arm parts 4a and 4b are extended and formed from the coil part 4c of a coil spring, you may form the arm parts 4a and 4b by another member, and may connect to the coil part 4c.

絶縁性基板５は、熱伝導率が低く、高温に耐える材料、例えば、熱硬化性プラスチックを用いるのがよい。熱伝導率の低い材料を用いると、抵抗素子１に流れる異常電流による発熱が絶縁性基板側に逃げることを防止できるからである。絶縁性基板５には、抵抗素子１の一方のリード線３ａを挿入するための貫通孔が開けられているとともに、上面（抵抗素子１の取付面側）にキャップ部２ａが挿入できる凹部５ａが形成されている。凹部５ａは、キャップ部２ａが嵌入されるように、キャップ部２ａの外径よりも僅かに大きい内径であることが抵抗素子１を固定する目的からは望ましいといえるが、必ずしも、凹部５ａを設けなくてもよい。抵抗素子１は、凹部５ａ内において、接着剤（例えば、シリコン系の接着剤）によって固定される。凹部５ａを設けない場合は、絶縁性基板５の上面に、接着剤（例えば、シリコン系の接着剤）で固定される。   The insulating substrate 5 is preferably made of a material having low thermal conductivity and capable of withstanding high temperatures, such as thermosetting plastic. This is because if a material having a low thermal conductivity is used, heat generated by an abnormal current flowing through the resistance element 1 can be prevented from escaping to the insulating substrate side. The insulating substrate 5 is provided with a through hole for inserting one lead wire 3a of the resistance element 1, and a recess 5a into which the cap portion 2a can be inserted on the upper surface (attachment side of the resistance element 1). Is formed. Although it is desirable for the purpose of fixing the resistance element 1 that the concave portion 5a has an inner diameter slightly larger than the outer diameter of the cap portion 2a so that the cap portion 2a is inserted, the concave portion 5a is not necessarily provided. It does not have to be. The resistance element 1 is fixed in the recess 5a by an adhesive (for example, a silicon-based adhesive). When the recess 5a is not provided, it is fixed to the upper surface of the insulating substrate 5 with an adhesive (for example, a silicon-based adhesive).

絶縁性基板５には、コイルばね４の一方のアーム部４ａを挿入するための貫通孔が、抵抗素子１の一方のリード線３ａを挿入するための貫通孔に対して所定のピッチとなるように開けられているとともに、上面（コイルばね４の取付面側）にコイルばね４のコイル部４ｃが緩く挿入できる凹部５ｂが設けられている。コイルばね４のコイル部４ｃが緩く挿入できるようにすることは、凹部５ｂにコイル部４ｃを挿入することによってばねを締め付けることがないようにして、ばね定数に影響を与えないようにするためである。したがって、ばね定数への影響がさほど問題とならないときは、緩くなくてもよい。いずれにしても、アーム部４ａを挿入するための貫通孔に対して凹部が偏った位置に形成されていることにより、コイルばね４の向きを規制することができる。コイルばね４のアーム部４ａを貫通孔に挿入するに際して、接着剤（例えば、シリコン系の接着剤）を用いてアーム部４ａをも絶縁性基板５に固定してもよい。   In the insulating substrate 5, a through hole for inserting one arm portion 4 a of the coil spring 4 has a predetermined pitch with respect to a through hole for inserting one lead wire 3 a of the resistance element 1. And a recess 5b into which the coil portion 4c of the coil spring 4 can be loosely inserted is provided on the upper surface (on the attachment surface side of the coil spring 4). The coil part 4c of the coil spring 4 can be loosely inserted in order to prevent the spring from being tightened by inserting the coil part 4c into the recess 5b and not to affect the spring constant. is there. Therefore, when the influence on the spring constant does not matter so much, it does not have to be loose. In any case, the direction of the coil spring 4 can be regulated by forming the concave portion at a position offset from the through hole for inserting the arm portion 4a. When inserting the arm portion 4a of the coil spring 4 into the through hole, the arm portion 4a may also be fixed to the insulating substrate 5 using an adhesive (for example, a silicon-based adhesive).

低融点金属６は、キャップ部２ｂとコイルばね４のアーム部４ｂとの間に設けられ、それが一定の温度に達すると溶断する金属であり、ヒューズメタルはその一種である。所定の融点の半田を用いてもよい。   The low melting point metal 6 is a metal that is provided between the cap portion 2b and the arm portion 4b of the coil spring 4, and melts when it reaches a certain temperature, and a fuse metal is one kind thereof. A solder having a predetermined melting point may be used.

ケース７は、絶縁性基板５の周縁に嵌合するようにして被せられ、内部となる抵抗素子１とコイルばね４を収納して保護する。透明な材料（例えば、アクリル樹脂等）を用いると、内部を透視でき、作動したか否かの確認が容易となる。もちろん、ケース７は不可欠のものではない。   The case 7 is covered so as to be fitted to the periphery of the insulating substrate 5, and houses and protects the resistance element 1 and the coil spring 4 which are inside. When a transparent material (for example, acrylic resin or the like) is used, the inside can be seen through, and it can be easily confirmed whether or not it has been activated. Of course, case 7 is not essential.

このヒューズ抵抗器の組立について説明する。絶縁性基板５の上述した貫通孔に、抵抗素子１の一方のリード線３ａを挿入して、キャップ部２ａが凹部５ａに挿入されて、接着剤によって、抵抗素子１が絶縁性基板５に固定される。抵抗素子１の固定に際しては、上部のキャップ部２ｂにおける抵抗線の溶接部分が外側に向くように固定されるのがよい。溶接部分が、コイルばね４のアーム部４ｂとの低融点金属による接続の邪魔にならないからである。コイルばね４は、アーム部４ａが貫通孔に挿通され、コイル部４ｃが凹部５ｂに挿入される。アーム部４ａの挿通に際して接着剤を用いてもよいことは上述したとおりである。この状態では、アーム部４ｂはキャップ部２ｂから十分に離れている。この状態で、キャップ部２ｂの側面を一方の接点部分とし、コイルばね４のアーム部４ｂの曲げられた先端が他方の接点部分となるように、コイルばね４の弾性力に抗して接触させて、低融点金属６で溶接する。その後、ケース７を被せて、ヒューズ抵抗器が組み立てられる。なお、この実施例では、アーム部４ｂの先端をキャップ部２ｂに対してほぼ垂直となるように曲げているが、先端部の形状は適宜でよく、必ずしも曲げなけれならないものではない。   The assembly of this fuse resistor will be described. One lead wire 3a of the resistive element 1 is inserted into the above-described through hole of the insulating substrate 5, the cap portion 2a is inserted into the concave portion 5a, and the resistive element 1 is fixed to the insulating substrate 5 with an adhesive. Is done. When the resistance element 1 is fixed, the resistance element 1 is preferably fixed so that the welded portion of the resistance wire in the upper cap portion 2b faces outward. This is because the welded portion does not interfere with the connection with the arm portion 4b of the coil spring 4 by the low melting point metal. As for the coil spring 4, the arm part 4a is penetrated by the through-hole, and the coil part 4c is inserted in the recessed part 5b. As described above, an adhesive may be used when the arm portion 4a is inserted. In this state, the arm portion 4b is sufficiently separated from the cap portion 2b. In this state, the side surface of the cap portion 2b is used as one contact portion, and the bent end of the arm portion 4b of the coil spring 4 is contacted against the elastic force of the coil spring 4 so as to be the other contact portion. And welding with the low melting point metal 6. Thereafter, the case 7 is put on and a fuse resistor is assembled. In this embodiment, the tip of the arm 4b is bent so as to be substantially perpendicular to the cap 2b. However, the shape of the tip may be appropriate and is not necessarily bent.

図２は、図１で説明した第１の実施例の変形例を説明するためのもので、図１（Ｃ）に対応する図である。この例は、コイル部４ｃの巻数を３としたものである。したがって、図１で説明した実施例に対して、コイル部４ｃの幅が大きくなっており、コイル部４ｃを挿入する凹部５ｂもそれに対応して大きくなっている。   FIG. 2 is a diagram for explaining a modification of the first embodiment described in FIG. 1 and corresponds to FIG. In this example, the number of turns of the coil portion 4c is three. Accordingly, the width of the coil portion 4c is larger than that of the embodiment described in FIG. 1, and the concave portion 5b into which the coil portion 4c is inserted is correspondingly larger.

なお、凹部４ｃの深さは、絶縁性基板５の厚みによって制限されるが、取付方向を規制できる深さであれば足りるものであり、必ずしもコイル部４ｃを十分に没入できる必要はなく、コイル部４ｃの一部を挿入できればよい。   Although the depth of the recess 4c is limited by the thickness of the insulating substrate 5, it is sufficient if the depth can regulate the mounting direction, and the coil portion 4c does not necessarily need to be sufficiently immersed, and the coil What is necessary is just to be able to insert a part of part 4c.

図３は、図１で説明したヒューズ抵抗器の動作の説明図であり、図３（Ａ）は正常状態、図３（Ｂ）は異常電流による遮断状態を示している。図中、図１と同様の部分には同じ符号を付して説明を省略する。   3A and 3B are explanatory diagrams of the operation of the fuse resistor described in FIG. 1, FIG. 3A shows a normal state, and FIG. 3B shows a cutoff state due to an abnormal current. In the figure, the same parts as those in FIG.

正常状態では、図３（Ａ）に示すように、アーム部４ｂはキャップ部２ｂに接続された状態を維持しており、リード線３ａとアーム部４ａの間は閉回路となっている。過電流が流れると、抵抗素子１で発生する熱によりキャップ部２ｂが加熱され、低融点金属６が溶ける。同時に、コイルばね４に蓄勢されているばね力によって、アーム部４ｂは急速にキャップ部２ｂから離れ、図３（Ｂ）に示すように、リード線３ａとアーム部４ａの間は開回路となって、ヒューズ抵抗器が挿入された回路を遮断する。   In the normal state, as shown in FIG. 3A, the arm portion 4b maintains a state of being connected to the cap portion 2b, and a closed circuit is formed between the lead wire 3a and the arm portion 4a. When the overcurrent flows, the cap portion 2b is heated by the heat generated in the resistance element 1, and the low melting point metal 6 is melted. At the same time, due to the spring force stored in the coil spring 4, the arm portion 4b is rapidly separated from the cap portion 2b, and an open circuit is formed between the lead wire 3a and the arm portion 4a as shown in FIG. Thus, the circuit in which the fuse resistor is inserted is cut off.

また、過電流によらずとも、周囲温度がなんらかの異常によって上昇して、低融点金属６がその熱によって溶融した場合も、同様に、リード線３ａとアーム部４ａの間が開回路となって、ヒューズ抵抗器が挿入された回路が遮断される。   Even when the ambient temperature rises due to some abnormality and the low melting point metal 6 is melted by the heat regardless of the overcurrent, the circuit between the lead wire 3a and the arm portion 4a is similarly opened. The circuit in which the fuse resistor is inserted is cut off.

図４は、本発明のヒューズ抵抗器の第２の実施例の概略の構造を説明するための正面図である。図中、図１，図３と同様の部分には同じ符号を付して説明を省略する。３ｂはリード線である。   FIG. 4 is a front view for explaining the schematic structure of the second embodiment of the fuse resistor of the present invention. In the figure, the same parts as those in FIGS. 3b is a lead wire.

この実施例では、キャップ部２ｂにもリード線３ｂが取り付けられている。そして、リード線３ｂを一方の接点部分として用いた。他方の接点部分であるアーム部４ｂとが低融点金属６で接続されていることは第１の実施例と同様である。このヒューズ抵抗器の動作は、キャップ部の熱がリード線３ｂに伝導されて、低融点金属が溶断するのであり、図３で説明したと同様であるので詳細な説明は省略する。   In this embodiment, the lead wire 3b is also attached to the cap portion 2b. The lead wire 3b was used as one contact portion. It is the same as that of the first embodiment that the arm portion 4b which is the other contact portion is connected by the low melting point metal 6. The operation of this fuse resistor is the same as that described with reference to FIG. 3 because the heat of the cap portion is conducted to the lead wire 3b and the low melting point metal is melted.

本発明のヒューズ抵抗器の第１の実施例の概略の構造を説明するためのもので、図１（Ａ）は正面図、図１（Ｂ）はＡ−Ａ線断面図、図１（Ｃ）はＢ−Ｂ線断面図である。FIG. 1A is a front view, FIG. 1B is a cross-sectional view taken along the line AA, and FIG. 1C is a diagram for explaining a schematic structure of a first embodiment of the fuse resistor of the present invention. ) Is a cross-sectional view taken along the line BB. 本発明のヒューズ抵抗器の第１の実施例の図１（Ｃ）に対応する変形例である。It is a modification corresponding to FIG.1 (C) of the 1st Example of the fuse resistor of this invention. 図１で説明したヒューズ抵抗器の動作の説明図であり、図２（Ａ）は正常状態、図２（Ｂ）は異常電流による遮断状態を示している。2A and 2B are explanatory diagrams of the operation of the fuse resistor described in FIG. 1, in which FIG. 2A shows a normal state and FIG. 2B shows a cutoff state due to an abnormal current. 本発明のヒューズ抵抗器の第２の実施例の概略の構造を説明するための正面図である。It is a front view for demonstrating the schematic structure of the 2nd Example of the fuse resistor of this invention. 従来のヒューズ抵抗器の構造の説明図である。It is explanatory drawing of the structure of the conventional fuse resistor.

符号の説明Explanation of symbols

１…抵抗素子、２ａ，２ｂ…キャップ部、３ａ…リード線、４…コイルばね、４ａ，４ｂ…アーム部、４ｃ…コイル部、５…絶縁性基板、５ａ，５ｂ…凹部、６…低融点金属、７…ケース。   DESCRIPTION OF SYMBOLS 1 ... Resistance element, 2a, 2b ... Cap part, 3a ... Lead wire, 4 ... Coil spring, 4a, 4b ... Arm part, 4c ... Coil part, 5 ... Insulating substrate, 5a, 5b ... Recessed part, 6 ... Low melting point Metal, 7 ... case.

Claims (5)

両端に導電性のキャップ部を有し前記両端の導電性のキャップ部に接続された抵抗体を有する抵抗素子と、コイル部とその両端に延びるアーム部を有するコイルばねと、絶縁性基板とを有し、前記抵抗素子の一方のキャップ部に接続されたリード線を一方の端子とし、前記コイルばねの一方のアーム部を他方の端子とするヒューズ抵抗器であって、
前記絶縁性基板には、前記リード線を挿通できる第１の貫通孔が設けられているとともに、前記コイル部の少なくとも一部を挿入するための第１の凹部と前記コイルばねの前記一方のアーム部を挿通できる第２の貫通孔が設けられており、
前記第１の凹部は、前記第２の貫通孔に対して偏った位置に形成されており、
前記抵抗素子は、前記リード線が前記第１の貫通孔に挿通されて前記一方のキャップ部側が前記絶縁性基板に固定されており、
前記コイルばねは、前記コイル部の少なくとも一部が前記第１の凹部に挿入され、かつ、前記一方のアーム部が前記第２の貫通孔に挿通されており、
前記コイルばねの他方のアーム部が前記コイルばねに蓄勢力を生じるように前記抵抗素子の他方のキャップ部に低融点金属により固定されており、
前記コイルばねは、前記第２の貫通孔によってその取付位置が規制され、前記第１の凹部によってその取付方向が規制されていることを特徴とするヒューズ抵抗器。 A resistance element having a conductive cap portion at both ends and having a resistor connected to the conductive cap portions at both ends, a coil spring having a coil portion and arm portions extending from both ends, and an insulating substrate A fuse resistor having, as one terminal, a lead wire connected to one cap portion of the resistance element, and having one arm portion of the coil spring as the other terminal,
The insulating substrate is provided with a first through hole into which the lead wire can be inserted, and a first recess for inserting at least a part of the coil portion and the one arm of the coil spring. A second through-hole through which the part can be inserted is provided,
The first recess is formed at a position biased with respect to the second through hole,
In the resistance element, the lead wire is inserted into the first through hole, and the one cap portion side is fixed to the insulating substrate,
In the coil spring, at least a part of the coil portion is inserted into the first recess, and the one arm portion is inserted into the second through hole,
The other arm portion of the coil spring is fixed to the other cap portion of the resistance element with a low melting point metal so that an accumulating force is generated in the coil spring,
The fuse resistor is characterized in that the mounting position of the coil spring is regulated by the second through hole, and the mounting direction of the coil spring is regulated by the first recess. 両端に導電性のキャップ部を有し前記両端の導電性のキャップ部に接続された抵抗体を有する抵抗素子と、コイル部とその両端に延びるアーム部を有するコイルばねと、絶縁性基板とを有し、前記抵抗素子の一方のキャップ部に接続されたリード線を一方の端子とし、前記コイルばねの一方のアーム部を他方の端子とするヒューズ抵抗器であって、
前記絶縁性基板には、前記リード線を挿通できる第１の貫通孔が設けられているとともに、前記コイル部の少なくとも一部を挿入するための第１の凹部と前記コイルばねの前記一方のアーム部を挿通できる第２の貫通孔が設けられており、
前記第１の凹部は、前記第２の貫通孔に対して偏った位置に形成されており、
前記抵抗素子は、前記リード線が前記第１の貫通孔に挿通されて前記一方のキャップ部側が前記絶縁性基板に固定されており、
前記コイルばねは、前記コイル部の少なくとも一部が前記第１の凹部に挿入され、かつ、前記一方のアーム部が前記第２の貫通孔に挿通されており、
前記コイルばねの他方のアーム部が前記コイルばねに蓄勢力を生じるように前記抵抗素子の他方のキャップ部に接続されたリード線に低融点金属により固定されており、
前記コイルばねは、前記第２の貫通孔によってその取付位置が規制され、前記第１の凹部によってその取付方向が規制されていることを特徴とするヒューズ抵抗器。 A resistance element having a conductive cap portion at both ends and having a resistor connected to the conductive cap portions at both ends, a coil spring having a coil portion and arm portions extending from both ends, and an insulating substrate A fuse resistor having, as one terminal, a lead wire connected to one cap portion of the resistance element, and having one arm portion of the coil spring as the other terminal,
The insulating substrate is provided with a first through hole into which the lead wire can be inserted, and a first recess for inserting at least a part of the coil portion and the one arm of the coil spring. A second through-hole through which the part can be inserted is provided,
The first recess is formed at a position biased with respect to the second through hole,
In the resistance element, the lead wire is inserted into the first through hole, and the one cap portion side is fixed to the insulating substrate,
In the coil spring, at least a part of the coil portion is inserted into the first recess, and the one arm portion is inserted into the second through hole,
The other arm portion of the coil spring is fixed to a lead wire connected to the other cap portion of the resistance element with a low melting point metal so that an accumulating force is generated in the coil spring,
The fuse resistor is characterized in that the mounting position of the coil spring is regulated by the second through hole, and the mounting direction of the coil spring is regulated by the first recess. 前記絶縁性基板に、前記一方のキャップ部の少なくとも一部を挿入するための第２の凹部が設けられ、前記抵抗素子の少なくとも一部が前記第２の凹部に挿入されて固定されていることを特徴とする請求項１または２に記載のヒューズ抵抗器。   The insulating substrate is provided with a second recess for inserting at least a part of the one cap part, and at least a part of the resistance element is inserted and fixed in the second recess. The fuse resistor according to claim 1 or 2. 前記抵抗素子と前記コイルばねが内部に収納されるように前記絶縁性基板の周縁に嵌合するようにして被せられたケースを有することを特徴とする請求項１ないし３のいずれか１項に記載のヒューズ抵抗器。   4. The case according to claim 1, further comprising a case that covers the periphery of the insulating substrate so that the resistance element and the coil spring are housed inside. 5. The fuse resistor described. 前記ケースが透明な材料で形成されていることを特徴とする請求項４に記載のヒューズ抵抗器。   The fuse resistor according to claim 4, wherein the case is made of a transparent material.
JP2007257494A 2007-10-01 2007-10-01 Fuse resistor Expired - Fee Related JP5177810B2 (en)

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DE102013003584B3 (en) * 2013-03-01 2014-04-03 Dehn + Söhne Gmbh + Co. Kg Separation and switching device for overvoltage protection
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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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JPH1021789A (en) * 1996-07-08 1998-01-23 Alps Electric Co Ltd Rotary operation switch
JP3272252B2 (en) * 1996-12-18 2002-04-08 秀夫 伊藤 Thermal fuse
JP3242863B2 (en) * 1997-06-10 2001-12-25 矢崎総業株式会社 Thermal fuse
JP2005093193A (en) * 2003-09-17 2005-04-07 Anzen Dengu Kk Resistor equipped with smokeless temperature fuse
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