[go: up one dir, main page]

JP4373539B2 - Fuse resistor - Google Patents

Fuse resistor Download PDF

Info

Publication number
JP4373539B2
JP4373539B2 JP23216599A JP23216599A JP4373539B2 JP 4373539 B2 JP4373539 B2 JP 4373539B2 JP 23216599 A JP23216599 A JP 23216599A JP 23216599 A JP23216599 A JP 23216599A JP 4373539 B2 JP4373539 B2 JP 4373539B2
Authority
JP
Japan
Prior art keywords
resistor
fuse
thermal fuse
heat
lead
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP23216599A
Other languages
Japanese (ja)
Other versions
JP2000285788A (en
Inventor
信二 岡本
悟 高崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hokuriku Electric Industry Co Ltd
Original Assignee
Hokuriku Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hokuriku Electric Industry Co Ltd filed Critical Hokuriku Electric Industry Co Ltd
Priority to JP23216599A priority Critical patent/JP4373539B2/en
Priority to PCT/JP2000/000492 priority patent/WO2000045409A1/en
Priority to CN 00800089 priority patent/CN1235254C/en
Publication of JP2000285788A publication Critical patent/JP2000285788A/en
Application granted granted Critical
Publication of JP4373539B2 publication Critical patent/JP4373539B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuses (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、電子部品や電気製品等の使用中に過電流や過熱が生じたときに断線し、回路やその他の部品の破損を防ぐヒューズ抵抗器に関する。
【０００２】
【従来の技術】
従来のヒューズ抵抗器は、図２に示すようにセラミック等からなる外装容器１の中に、外部回路と接続するリード端子２が取りつけられた温度ヒューズ３と抵抗体４とを設け、さらにこの外装容器１の内側に絶縁性のセメント５や樹脂等を充填したものがあった。ここで、抵抗体４は所定の抵抗値を有し、温度ヒューズ３は、過電流や過電圧による抵抗体４の温度の上昇により、瞬間的に断線する機能を有するものである。
【０００３】
また、抵抗体４と温度ヒューズ３は、それぞれ外部回路と接続するリード端子２を備えており、また、これらは外装容器１内で所定幅だけ離れて配置されている。そして、抵抗体４は、絶縁性のセメント５で覆われ、抵抗体４と温度ヒューズ３の間は電気的に絶縁されていた。
【０００４】
このような抵抗温度ヒューズ３を設けた機器に過電流や発熱等の異常が発生した場合、リード端子２を介して抵抗体４と直列に接続されヒューズ素子２に過電流が流れ抵抗体４が発熱する。そしてこの熱により温度ヒューズ３が溶断し、温度ヒューズ３とリード端子２を介し直列に接続された回路が遮断される。
【０００５】
また他の形態のヒューズ抵抗器として、特開平９−１４７７１０号公報に開示されているように、第一基板に設けられた一対の電極と、と一対の銀電極が設けられ、電極間には抵抗体を形成し、電極間には棒状の可溶体が設けられているものがあった。この第一基板１の表面には第二基板が設けられ、さらに樹脂で覆われていた。
【０００６】
【発明が解決しようとする課題】
上記従来の技術の前者の場合、セラミック等の外装容器１を使用するため、外形寸法が大きくなるという問題があった。さらに、外装容器１と外装容器１内に充填するセメント１等により、製品体積が大きくなり重量も重くなっていた。そして、製品サイズと重量が大きくなるため、自動給送用テープに取り付けることができず、自動組立機により回路基板上に自動的に装着することができなかった。
【０００７】
また、上記従来の技術の後者の場合も、第一基板と第二基板により抵抗体とヒューズを覆うため、大型で製品重量が重くなっていた。
【０００８】
この発明は上記従来の技術の問題点に鑑みてなされたものであり、小型で構造も簡単であり、正確に作動し、回路基板に容易に自動装着すること等も可能なヒューズ抵抗器を提供することを目的とする。
【０００９】
【課題を解決するための手段】
この発明は、直列に接続され互いに隣接する抵抗体と温度ヒューズと、上記抵抗体と上記温度ヒューズに設けられた各一対のリード端子とからなるヒューズ抵抗体である。上記抵抗体と上記温度ヒューズは、筒状の絶縁性樹脂の覆材が被せられてなる。
【００１０】
また、上記覆材は熱収縮性樹脂であり、上記抵抗体と温度ヒューズに上記覆材を被せた後、熱収縮させてなるものである。この熱収縮性樹脂は、シリコーンゴムを含むシリコーン樹脂である。
【００１１】
上記抵抗体と温度ヒューズの一方の各端部から延びた一対のリード端子の少なくとも一方が折り曲げられて、他方のリード端子と溶接されている。特に、上記抵抗体と温度ヒューズの他方の各端部から延びた一対のリード端子の少なくとも一方が、上記溶接されたリード端子の折り曲げ方向と反対方向に折り曲げられているものである。また、上記抵抗体と温度ヒューズの他方の各端部から延びた一対のリード端子の少なくとも一方が、その先端に向かうに従い他方のリード端子から離れるように折り曲げられている。また、上記抵抗体と温度ヒューズの他方の各端部から延びた一対のリード端子には、熱収縮性の絶縁性樹脂チューブが被せられている。
【００１２】
さらにこの発明のヒューズ抵抗器は、上記抵抗体と温度ヒューズの他方の各端部から延びた一対のリード端子は、上記覆材の一方の開口端部から延出し、多数の上記一対のリード端子が、自働給送用テープに等間隔で貼り付けられるものである。さらに、上記抵抗体と温度ヒューズの他方の各端部から延びた一対のリード端子のうち上記抵抗体から延びたリード端子は、上記抵抗体側の基端部で折り曲げられ、上記温度ヒューズから延びたリード端子との間隔が所定長さに設定され、上記自働給送用テープに貼り付けられているものである。
【００１３】
この発明のヒューズ抵抗器は、覆材の内側に温度ヒューズと抵抗体を並べて挿入し抵抗体と温度ヒューズを保護している。さらに、熱収縮性の覆材を適度に加熱し、熱収縮させることにより、温度ヒューズと抵抗体を密着させているものである。
【００１４】
【発明の実施の形態】
以下、この発明の実施形態について図面に基づいて説明する。図１は、この発明の一実施形態のヒューズ抵抗器１０を示し、ヒューズ抵抗器１０は、互いに直列に接続された円筒形の温度ヒューズ１２と略円筒形の抵抗体１４が設けられ、温度ヒューズ１２と抵抗体１４は互いにほぼ平行に並ベられている。
【００１５】
抵抗体１４の種類は、金属皮膜、炭素皮膜、酸化金属皮膜、巻き線、メタルグレーズ膜、カーボンレジン膜等、種類は問わない。また、温度ヒューズ１２は、Ｓｎ−Ｐｂ系、Ｐｂ−Ｓｂ系、Ｓｎ−Ｓｂ系などのハンダ合金や、Ｂｉ−Ｓｎ−Ｐｂ、Ｐｂ−Ａｕ、その他融点の低い合金からなる。
【００１６】
温度ヒューズ１２と抵抗体１４には、外部回路と接続する各一対のリード端子１６，１７が設けられ、その一方の側のリード端子１７同士が電気スポット溶接等で接続されている。このとき、抵抗体１４側のリード端子１７が直角に折り曲げられて、温度ヒューズ１２側のリード端子１７にスポット溶接されている。また、他方の一対のリード端子１６の基端部付近はポリオレフィン等の熱収縮性の絶縁性樹脂チューブ１８で被覆されている。
【００１７】
そして、温度ヒューズ１２と抵抗体１４の外側には、筒状の覆材２０が取り付けられている。覆材２０は、絶縁性の高い熱収縮性樹脂で、例えばポリエチレン系樹脂のチューブや、シリコーンゴムを含むシリコーン樹脂のチューブ等を適宜の長さに切ったものである。特にシリコーン樹脂は、耐熱性が良く、１５０℃程度で収縮し２００℃程度までの耐熱性を有するので、より好ましい。温度ヒューズ１２の作動温度及び抵抗体１４の発熱温度は、この覆材２０の耐熱温度よりも低いものであり、発火の恐れはない。また、熱収縮させる温度が温度ヒューズ１２の溶解温度以上であっても、加熱時間が短ければ温度ヒューズ１２は溶解しない。
【００１８】
一対のリード端子１６は、抵抗体１４に設けられているリード端子１６ａが基端部で外側にわずかに折り曲げられ、そして途中で他方のリード端子１６に対してほぼ平行となるように折り曲げられ、一対のリード端子１６の間隔は、回路基板に差し込む幅、例えば５ｍｍに設定されている。この抵抗体１４のリード端子１６の折り曲げ方向は、抵抗体１４の一方のリード端子１７の折り曲げ方向を含む面上に位置している。
【００１９】
次にこの発明のヒューズ抵抗器１０の製造方法について説明する。まず、温度ヒューズ１２と抵抗体１４の各一方のリード端子１７同士をスポット溶接し、互いに直列に接続して、温度ヒューズ１２と抵抗体１４を互いにほぼ平行に並べた状態に形成する。この状態で、先ず、各端子１６に各々絶縁性樹脂チューブ１８を挿通する。そして熱収縮させ、抜け落ちないようにする。さらに、端子１６を所定角度に折り曲げる。このとき、折り曲げ方向は、端子１７の折り曲げ方向と同じくし、端子１６，１７が折り曲げ状態でほぼ同一面上に位置するようにする。この後、温度ヒューズ１２と抵抗体１４を、覆材２０内に挿通する。そして、覆材２０を１５０℃程度に加熱し、覆材２０を熱収縮させて、温度ヒューズ１２と抵抗体１４に密着させる。
【００２０】
このヒューズ抵抗器１０の回路基板への取り付け方法は、まず、図１に示すようにリード端子１６が自動給送用テープ２２とほぼ直角になるようにしかも一定のピッチで配置し、粘着テープ２４により、自動給送用テープ２２上にこのヒューズ抵抗器１０を多数取り付けたものを形成する。
【００２１】
そして、この状態の自動給送用テープ２２を自動装着装置に装填する。自働装着装置の所定位置に自動給送用テープ２２が送られると、マシンハンドがヒューズ抵抗器１０を保持し、カッターがリード端子１６を所定の長さで切断する。そして、マシンハンドにより、ヒューズ抵抗器１０を回路基板の所定の透孔に装着する。この際、絶縁性樹脂チューブ１８は、回路基板表面に当接して、リード端子１６の差し込みにおけるストッパの作用をする。
【００２２】
この実施形態のヒューズ抵抗器１０によれば、簡単な構造で小型であり、自働給送用テープ２２に取りつけて回路基板に自動装着することができ、効率がよく実装することができ、実装コストを削減することができる。さらに、覆材２０を熱収縮させて取りつけるだけなので、接着剤等を使用する必要がなく、製造が容易でコストが安価である。また、リード端子１７同士はスポット溶接により連結固定されているため、強度が高く、リード端子１７等の折り曲げに際しても溶接部が外れることがない。この端子１７の接続には、はんだ付けも考えられるが、はんだ付けの場合、熱がかかる時間が長く、熱が温度ヒューズ１２に伝わってヒューズが部分的に溶けて切れやすくなったり、溶断したりする恐れがある。これに対してスポット溶接は、瞬間的に熱がかかるものであり、温度ヒューズ１２に悪影響を与えることがなく製造も容易である。しかも、溶接部の熱伝導性も良く、抵抗体１４で発生した熱が効率よく温度ヒューズ１２に伝達され、確実且つ正確にヒューズ機能を果たす。その他、この実施形態のヒューズ抵抗器１０は、セメント等を使用せず、軽量である。
【００２３】
またこの実施形態のリード端子１６は、熱収縮性の絶縁性樹脂チューブ１８が被せられているので、絶縁性樹脂チューブ１８がリード端子１６から抜け落ちてしまうことがない。さらに、２本のリード端子が絶縁性樹脂チューブ１８で被覆され、回路基板への実装後に互いにねじれて接触しても、電気的に短絡することはない。しかも、この絶縁性樹脂チューブ１８により、回路基板への実装時に、回路基板と抵抗体１４等の距離を一定に保つ。そして、この回路基板との距離を保つことにより、実装時のはんだ付けの熱が温度ヒューズ１２に伝わりにくくし、はんだの熱によるヒューズ切れを防止するものである。
【００２４】
さらに、この実施形態では、一般に抵抗体１４はセラミックで作られているため変形しにくく、抵抗体１４に設けられたリード端子１６ａの方を折り曲げて、柔らかい外装の温度ヒューズ１２に設けられたリード端子１６ｂは折り曲げないようにすることで、製造工程での不良が減り歩留まりが良くなる。また、リード端子１６ａ，１６ｂを互いに近づくように力を加えた状態で回路基板に実装することにより、温度ヒューズ１２と抵抗体１４を互いにより密着させることができる。
【００２５】
なお、この発明のヒューズ抵抗器は上記実施形態の限定されるものではなく、覆材の形状は適宜変更可能であり、適宜の筒状体を使用することができる。
【００２６】
【発明の効果】
この発明のヒューズ抵抗器は、簡単な構造で小型であり、自働給送用テープに取りつけて回路基板に自働装着することも容易に可能である。さらに、覆材は、熱収縮させて取りつけることにより、製造コストを大幅に削減することができる。
【図面の簡単な説明】
【図１】 この発明の一実施形態のヒューズ抵抗器をテーピングした状態の正面図である。
【図２】 従来の技術のヒューズ抵抗器の斜視図である。
【符号の説明】
１０ ヒューズ抵抗器
１２ 温度ヒューズ
１４ 抵抗体
１６，１７ リード端子
１８ 絶縁性樹脂チューブ
２０ 覆材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuse resistor that is disconnected when an overcurrent or overheat occurs during use of an electronic component, an electrical product, or the like, and prevents damage to a circuit or other components.
[0002]
[Prior art]
As shown in FIG. 2, a conventional fuse resistor is provided with a thermal fuse 3 having a lead terminal 2 connected to an external circuit and a resistor 4 in an exterior container 1 made of ceramic or the like. Some containers 1 were filled with insulating cement 5 or resin. Here, the resistor 4 has a predetermined resistance value, and the thermal fuse 3 has a function of instantaneously disconnecting due to an increase in temperature of the resistor 4 due to overcurrent or overvoltage.
[0003]
The resistor 4 and the thermal fuse 3 are each provided with a lead terminal 2 connected to an external circuit, and they are arranged in the outer container 1 with a predetermined width apart. The resistor 4 was covered with an insulating cement 5, and the resistor 4 and the thermal fuse 3 were electrically insulated.
[0004]
When an abnormality such as overcurrent or heat generation occurs in a device provided with such a resistance temperature fuse 3, an overcurrent flows through the fuse element 2 through the lead terminal 2 in series with the resistor 4, and the resistor 4 is connected. Fever. The thermal fuse 3 is melted by this heat, and the circuit connected in series via the thermal fuse 3 and the lead terminal 2 is interrupted.
[0005]
As another form of fuse resistor, as disclosed in Japanese Patent Laid-Open No. 9-147710, a pair of electrodes provided on the first substrate and a pair of silver electrodes are provided. Some resistors were formed, and rod-shaped fusible bodies were provided between the electrodes. A second substrate was provided on the surface of the first substrate 1 and was further covered with a resin.
[0006]
[Problems to be solved by the invention]
In the former case of the above-described conventional technique, there is a problem that the outer dimension is increased because the outer container 1 made of ceramic or the like is used. Further, the outer container 1 and the cement 1 filled in the outer container 1 have increased the product volume and weight. Since the product size and weight increase, it cannot be attached to an automatic feeding tape and cannot be automatically mounted on a circuit board by an automatic assembly machine.
[0007]
Also in the latter case of the above-described conventional technology, the resistor and the fuse are covered with the first substrate and the second substrate, so that the product is large and heavy.
[0008]
The present invention has been made in view of the above-mentioned problems of the prior art, and provides a fuse resistor that is small in size, has a simple structure, operates accurately, and can be easily automatically mounted on a circuit board. The purpose is to do.
[0009]
[Means for Solving the Problems]
The present invention is a fuse resistor including a resistor and a thermal fuse which are connected in series and are adjacent to each other, and a pair of lead terminals provided in the resistor and the thermal fuse. The resistor and the thermal fuse are covered with a cylindrical insulating resin covering material.
[0010]
Further, the covering material is a heat-shrinkable resin, and is formed by covering the resistor and the thermal fuse with the covering material and then thermally contracting. This heat-shrinkable resin is a silicone resin containing silicone rubber.
[0011]
At least one of the pair of lead terminals extending from each end of one of the resistor and the thermal fuse is bent and welded to the other lead terminal. In particular, at least one of the pair of lead terminals extending from the other ends of the resistor and the thermal fuse is bent in a direction opposite to the bending direction of the welded lead terminal. Further, at least one of the pair of lead terminals extending from the other ends of the resistor and the thermal fuse is bent so as to be separated from the other lead terminal toward the tip. A pair of lead terminals extending from the other ends of the resistor and the thermal fuse are covered with a heat-shrinkable insulating resin tube.
[0012]
Further, in the fuse resistor according to the present invention, the pair of lead terminals extending from the other end portions of the resistor and the thermal fuse extend from one opening end portion of the covering member, and a plurality of the pair of lead terminals. However, it is affixed on the automatic feeding tape at equal intervals. Further, of the pair of lead terminals extending from the other ends of the resistor and the thermal fuse, the lead terminal extending from the resistor is bent at the proximal end on the resistor side and extends from the thermal fuse. The distance from the lead terminal is set to a predetermined length, and is affixed to the automatic feeding tape.
[0013]
In the fuse resistor of the present invention, a thermal fuse and a resistor are arranged side by side inside the covering material to protect the resistor and the thermal fuse. Further, the thermal fuse and the resistor are brought into close contact with each other by appropriately heating and thermally contracting the heat-shrinkable covering material.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a fuse resistor 10 according to an embodiment of the present invention. The fuse resistor 10 is provided with a cylindrical thermal fuse 12 and a substantially cylindrical resistor 14 connected in series with each other. 12 and the resistor 14 are arranged substantially parallel to each other.
[0015]
The type of the resistor 14 is not particularly limited, such as a metal film, a carbon film, a metal oxide film, a winding, a metal glaze film, and a carbon resin film. The thermal fuse 12 is made of a solder alloy such as Sn—Pb, Pb—Sb, or Sn—Sb, Bi—Sn—Pb, Pb—Au, or other alloys having a low melting point.
[0016]
The thermal fuse 12 and the resistor 14 are each provided with a pair of lead terminals 16 and 17 connected to an external circuit, and the lead terminals 17 on one side thereof are connected by electric spot welding or the like. At this time, the lead terminal 17 on the resistor 14 side is bent at a right angle and spot-welded to the lead terminal 17 on the thermal fuse 12 side. The vicinity of the base end of the other pair of lead terminals 16 is covered with a heat-shrinkable insulating resin tube 18 such as polyolefin.
[0017]
A cylindrical covering member 20 is attached to the outside of the thermal fuse 12 and the resistor 14. The covering material 20 is a heat-shrinkable resin having a high insulating property, and is obtained by cutting, for example, a polyethylene resin tube, a silicone resin tube containing silicone rubber, or the like into an appropriate length. In particular, a silicone resin is more preferable because it has good heat resistance, shrinks at about 150 ° C., and has heat resistance up to about 200 ° C. The operating temperature of the thermal fuse 12 and the heat generation temperature of the resistor 14 are lower than the heat-resistant temperature of the covering material 20, and there is no fear of ignition. Even if the heat shrink temperature is equal to or higher than the melting temperature of the thermal fuse 12, the thermal fuse 12 will not melt if the heating time is short.
[0018]
The pair of lead terminals 16 is bent so that a lead terminal 16a provided on the resistor 14 is slightly bent outward at the base end, and is substantially parallel to the other lead terminal 16 in the middle. The distance between the pair of lead terminals 16 is set to a width to be inserted into the circuit board, for example, 5 mm. The bending direction of the lead terminal 16 of the resistor 14 is located on the surface including the bending direction of one lead terminal 17 of the resistor 14.
[0019]
Next, a method for manufacturing the fuse resistor 10 of the present invention will be described. First, one lead terminal 17 of each of the thermal fuse 12 and the resistor 14 is spot welded and connected in series to form the thermal fuse 12 and the resistor 14 in a state of being arranged substantially parallel to each other. In this state, first, the insulating resin tubes 18 are inserted into the respective terminals 16. Then heat shrink so that it does not fall out. Further, the terminal 16 is bent at a predetermined angle. At this time, the bending direction is the same as the bending direction of the terminal 17 so that the terminals 16 and 17 are located on substantially the same plane in the bent state. Thereafter, the thermal fuse 12 and the resistor 14 are inserted into the covering member 20. Then, the covering material 20 is heated to about 150 ° C., and the covering material 20 is thermally contracted to be brought into close contact with the thermal fuse 12 and the resistor 14.
[0020]
As shown in FIG. 1, first, the fuse resistor 10 is mounted on the circuit board so that the lead terminals 16 are substantially perpendicular to the automatic feeding tape 22 and arranged at a constant pitch. In this manner, a large number of fuse resistors 10 are formed on the automatic feeding tape 22.
[0021]
Then, the automatic feeding tape 22 in this state is loaded into the automatic mounting device. When the automatic feeding tape 22 is fed to a predetermined position of the automatic mounting device, the machine hand holds the fuse resistor 10 and the cutter cuts the lead terminal 16 by a predetermined length. Then, the fuse resistor 10 is mounted in a predetermined through hole of the circuit board by a machine hand. At this time, the insulating resin tube 18 abuts on the surface of the circuit board and acts as a stopper in inserting the lead terminal 16.
[0022]
According to the fuse resistor 10 of this embodiment, it has a simple structure and is small, can be mounted on the automatic feeding tape 22 and automatically mounted on the circuit board, and can be efficiently mounted. Cost can be reduced. Furthermore, since the covering member 20 is simply heat-shrinked and attached, it is not necessary to use an adhesive or the like, and the manufacturing is easy and the cost is low. Further, since the lead terminals 17 are connected and fixed by spot welding, the strength is high, and the welded portion does not come off when the lead terminal 17 or the like is bent. The terminal 17 may be connected by soldering. However, in the case of soldering, the heat takes a long time, and the heat is transmitted to the thermal fuse 12 so that the fuse is partially melted or easily blown. There is a fear. In contrast, spot welding is instantaneously heated, and is easy to manufacture without adversely affecting the thermal fuse 12. In addition, the thermal conductivity of the welded portion is good, and the heat generated by the resistor 14 is efficiently transmitted to the thermal fuse 12 to perform the fuse function reliably and accurately. In addition, the fuse resistor 10 of this embodiment is lightweight without using cement or the like.
[0023]
In addition, since the lead terminal 16 of this embodiment is covered with the heat-shrinkable insulating resin tube 18, the insulating resin tube 18 does not fall out of the lead terminal 16. Furthermore, even if the two lead terminals are covered with the insulating resin tube 18 and are twisted to contact each other after being mounted on the circuit board, there is no electrical short circuit. Moreover, the insulating resin tube 18 keeps the distance between the circuit board and the resistor 14 constant when mounted on the circuit board. By keeping the distance from the circuit board, the soldering heat at the time of mounting is not easily transmitted to the thermal fuse 12, and the fuse blown by the solder heat is prevented.
[0024]
Further, in this embodiment, since the resistor 14 is generally made of ceramic, it is difficult to be deformed. The lead terminal 16a provided on the resistor 14 is bent, and the lead provided on the soft thermal fuse 12 is provided. By preventing the terminal 16b from being bent, defects in the manufacturing process are reduced and the yield is improved. Further, by mounting the lead terminals 16a and 16b on the circuit board in a state where a force is applied so as to approach each other, the thermal fuse 12 and the resistor 14 can be more closely attached to each other.
[0025]
In addition, the fuse resistor of this invention is not limited to the said embodiment, The shape of a covering material can be changed suitably, and a suitable cylindrical body can be used.
[0026]
【The invention's effect】
The fuse resistor of the present invention has a simple structure and is small, and can be easily attached to a circuit board by being attached to an automatic feeding tape. Furthermore, the covering material can be greatly reduced in manufacturing cost by being thermally contracted.
[Brief description of the drawings]
FIG. 1 is a front view of a state in which a fuse resistor according to an embodiment of the present invention is taped.
FIG. 2 is a perspective view of a prior art fuse resistor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fuse resistor 12 Thermal fuse 14 Resistor 16, 17 Lead terminal 18 Insulating resin tube 20 Covering material

Claims (2)

直列に接続され互いに並設された抵抗体と温度ヒューズと、上記抵抗体と上記温度ヒューズに設けられた一対のリード端子と、上記抵抗体と上記温度ヒューズを覆った筒状の絶縁性の熱収縮性樹脂の覆材とからなり、上記熱収縮性樹脂は上記抵抗体の発熱温度以上の耐熱温度を有するシリコーン樹脂であり、筒状の上記熱収縮性樹脂の覆材を上記抵抗体と温度ヒューズに被せて熱収縮させてなり、上記熱収縮性樹脂の覆材は熱収縮した状態で上記温度ヒューズと抵抗体を密着させ、並設された上記抵抗体と上記温度ヒューズのうち、上記抵抗体から延びた一方のリード端子が折り曲げられて、上記温度ヒューズから延びた一方のリード端子と溶接され、上記抵抗体の他方のリード端子は、温度ヒューズから延びたリード線と溶接されたリード端子の折り曲げ方向と反対方向にであって、上記温度ヒューズのリード端子から離れるように上記抵抗体側の基端部で折り曲げられ、上記抵抗体と温度ヒューズから延びた一対のリード端子は、各リード端子の間隔が所定長さに設定され、抵抗器の自動装着装置に装填される自働給送用テープに貼り付けられていることを特徴とするヒューズ抵抗器。A resistor and a thermal fuse connected in series and juxtaposed with each other, a pair of lead terminals provided on the resistor and the thermal fuse, and a cylindrical insulating heat covering the resistor and the thermal fuse consists of a covering material of shrinkable resin, the heat-shrinkable resin is a silicone resin having a heat generating temperature above the heat resistant temperature of the resistor, tubular covering material the resistance of the heat-shrinkable resin and temperature The heat-shrinkable resin covering material is in a heat-shrinked state so that the temperature fuse and the resistor are brought into close contact with each other, and the resistor of the resistor and the temperature fuse arranged in parallel is the resistor. One lead terminal extending from the body is bent and welded to one lead terminal extending from the thermal fuse, and the other lead terminal of the resistor is a lead welded to the lead wire extending from the thermal fuse A pair of lead terminals extending from the resistor and the thermal fuse are connected to each lead in a direction opposite to the bending direction of the child and bent at the proximal end on the resistor side so as to be separated from the lead terminal of the thermal fuse. A fuse resistor, characterized in that a terminal interval is set to a predetermined length and is affixed to an automatic feeding tape loaded in an automatic resistor mounting device . 互いに並設された上記抵抗体と温度ヒューズは、その一方の各端部から延びた一対のリード端子が、互いにスポット溶接されて連結されている請求項１記載のヒューズ抵抗器。  The fuse resistor according to claim 1, wherein the resistor and the thermal fuse arranged in parallel with each other are connected by spot welding of a pair of lead terminals extending from one end of each of the resistors and the thermal fuse.
JP23216599A 1999-01-29 1999-08-19 Fuse resistor Expired - Lifetime JP4373539B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP23216599A JP4373539B2 (en) 1999-01-29 1999-08-19 Fuse resistor
PCT/JP2000/000492 WO2000045409A1 (en) 1999-01-29 2000-01-28 Fuse unit
CN 00800089 CN1235254C (en) 1999-01-29 2000-01-28 Fuse unit

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP11-22416 1999-01-29
JP2241699 1999-01-29
JP23216599A JP4373539B2 (en) 1999-01-29 1999-08-19 Fuse resistor

Publications (2)

Publication Number Publication Date
JP2000285788A JP2000285788A (en) 2000-10-13
JP4373539B2 true JP4373539B2 (en) 2009-11-25

Family

ID=26359638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23216599A Expired - Lifetime JP4373539B2 (en) 1999-01-29 1999-08-19 Fuse resistor

Country Status (3)

Country Link
JP (1) JP4373539B2 (en)
CN (1) CN1235254C (en)
WO (1) WO2000045409A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009010702A1 (en) * 2007-07-17 2009-01-22 Powrmatic Limited A heating module and system controller that increases the efficiency of heat pumps for domestic hot water and heating
JP2009050096A (en) * 2007-08-21 2009-03-05 Nidec Shibaura Corp Brushless mold motor
KR101038237B1 (en) * 2009-04-21 2011-05-31 스마트전자 주식회사 Fuse resistor
KR101060013B1 (en) 2009-04-21 2011-08-26 스마트전자 주식회사 Fuse Resistor, Manufacturing Method and Installation Method
WO2011094182A2 (en) * 2010-01-29 2011-08-04 Flextronics Ap, Llc Resistor with thermal element

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5840507Y2 (en) * 1982-04-16 1983-09-12 東京軽電機株式会社 Lead wire insulation spacer for temperature fuses, etc.
JPS5989501U (en) * 1982-12-08 1984-06-18 株式会社東芝 Resistor
JPS59176107U (en) * 1983-05-09 1984-11-24 内橋エステック株式会社 Resistor with temperature fuse
JPS61166410U (en) * 1985-04-03 1986-10-15
JPS62120241U (en) * 1986-01-23 1987-07-30
JPH0195040U (en) * 1987-12-16 1989-06-22
JPH03216927A (en) * 1990-01-19 1991-09-24 Matsushita Electric Ind Co Ltd Electronic component protecting fuse
US5428338A (en) * 1994-01-10 1995-06-27 Therm-O-Disc, Incorporated Thermal cutoff assembly

Also Published As

Publication number Publication date
JP2000285788A (en) 2000-10-13
CN1293818A (en) 2001-05-02
WO2000045409A1 (en) 2000-08-03
CN1235254C (en) 2006-01-04

Similar Documents

Publication Publication Date Title
US6373371B1 (en) Preformed thermal fuse
EP0316925B1 (en) Fuse assembly for solid electrolytic capacitor
JP6580504B2 (en) Protective element
JPS5821816B2 (en) Electrolytic capacitor assembly with fuse
JP4373539B2 (en) Fuse resistor
US5198792A (en) Electrical fuses and method of manufacture
JP2616174B2 (en) Overcurrent protection components
TWI727472B (en) Fuse resistor assembly and method of manufacturing the fuse resistor assembly
JPH07262904A (en) Fuse resistor
JPH0736315B2 (en) Square chip-shaped fuse parts
JP4234818B2 (en) Resistance thermal fuse and manufacturing method thereof
JP6934681B2 (en) Fuse resistor assembly and manufacturing method of fuse resistor assembly
EP0518510B1 (en) Electrical fuses
JP2518214Y2 (en) Low power fusing type fuse resistor
JP2020173920A (en) Protection element
JPH042023A (en) Resistance/thermal fuse and manufacture thereof
JP3594649B2 (en) Substrate type resistance / temperature fuse
JP2002110010A (en) Protective element
JP2574700B2 (en) Flat thermal fuse
JPH0795418B2 (en) Flat thermal fuse
JP2505566B2 (en) Method of manufacturing resistor with temperature fuse
JP2634467B2 (en) 2 terminal type small time lag fuse
CA1191178A (en) Fuse for thick film device
JP2550465Y2 (en) Communication terminal equipment protector
JPH076604Y2 (en) Current fuse

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20060622

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081224

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090223

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090520

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090714

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090811

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090904

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120911

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4373539

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120911

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130911

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term