JPH06124801A - Surface-mount type wire wound reistor - Google Patents
Surface-mount type wire wound reistorInfo
- Publication number
- JPH06124801A JPH06124801A JP27275292A JP27275292A JPH06124801A JP H06124801 A JPH06124801 A JP H06124801A JP 27275292 A JP27275292 A JP 27275292A JP 27275292 A JP27275292 A JP 27275292A JP H06124801 A JPH06124801 A JP H06124801A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- mount type
- base
- terminal
- type wire
- 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.)
- Pending
Links
- 239000011810 insulating material Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 abstract description 6
- 239000000758 substrate Substances 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000570 Cupronickel Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 3
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 3
- LTPBRCUWZOMYOC-UHFFFAOYSA-N Beryllium oxide Chemical compound O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Details Of Resistors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、面実装形巻線抵抗器に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount type wire wound resistor.
【０００２】[0002]
【従来の技術】従来、巻線抵抗器は精度、安定性、信頼
性の高い抵抗器として用いられており、巻線抵抗器に関
する技術としては、例えば図２に示すものがあった。こ
の抵抗器は、アルミナ磁器のベース１１にニッケルクロ
ム合金や銅ニッケル合金等の抵抗線１３を巻線して、両
端にリード線１２をつなぎ全体をシリコーン樹脂やほう
ろう等の絶縁材料１４で外装している。2. Description of the Related Art Conventionally, a wire wound resistor has been used as a resistor having high accuracy, stability and reliability, and as a technique related to the wire wound resistor, for example, there is one shown in FIG. In this resistor, a resistance wire 13 made of nickel-chromium alloy or copper-nickel alloy is wound around a base 11 of alumina porcelain, lead wires 12 are connected to both ends, and the whole is covered with an insulating material 14 such as silicone resin or enamel. ing.
【０００３】[0003]
【発明が解決しようとする課題】近年、各方面で、各種
電子部品を低温から高温までの過酷な温度条件の下で、
高信頼性をもって使用される状況に到っている。しかし
ながら、前記した従来の巻線抵抗器によれば、−３０℃
〜２７５℃の熱衝撃の加わる過酷な使用条件の下、また
は絶えず大量の発熱が生じる電力用の抵抗器として使用
する条件下では、その抵抗器の外装にクラックが生じ、
抵抗器として品質が維持できないものであった。また、
前記した従来の巻線抵抗器を配線基板に実装するには、
リードを折り曲げ、巻線抵抗器自体を配線基板より浮か
せた状態で取りつけなければ、抵抗器自体の発熱する熱
で配線基板を焦がしてしまう欠点があった。Recently, in various fields, various electronic components have been subjected to severe temperature conditions from low temperature to high temperature.
The situation has come to be used with high reliability. However, according to the conventional wire wound resistor described above, -30 ° C
Under harsh conditions of application of thermal shock of ~ 275 ° C or under conditions of use as a resistor for electric power that constantly generates a large amount of heat, cracks occur in the exterior of the resistor,
The quality could not be maintained as a resistor. Also,
To mount the above-mentioned conventional wire wound resistor on the wiring board,
If the lead wire is bent and the winding resistor itself is not mounted above the wiring board, the heat generated by the resistor itself will burn the wiring board.
【０００４】一方、近年、殆どの電子部品の分野におい
て軽量化、小型化、高密度実装化が進み、そのような電
子部品として面実装形電子部品の開発がなされてきた。
しかしながら、抵抗体として巻線を用いた面実装形巻線
抵抗器は、使用環境において、−３０℃〜２７５℃の熱
衝撃の加わる過酷な条件の下における抵抗器から発生す
る熱の問題を解決したもの及び絶縁形のものはなく、実
用化されていなかった。 そこで本発明は、以上述べた
面実装形巻線抵抗器が、熱衝撃のある使用条件の下で弱
いという問題点、面実装形巻線抵抗器が、大量に発生す
る熱の問題点を解決し、また、絶縁性を有した、性能の
安定した面実装形巻線抵抗器を提供することを目的とす
る。On the other hand, in recent years, in most of the fields of electronic parts, weight reduction, downsizing, and high-density mounting have progressed, and surface mounting type electronic parts have been developed as such electronic parts.
However, the surface-mounted wire-wound resistor using the winding as a resistor solves the problem of heat generated from the resistor under the severe conditions of thermal shock of −30 ° C. to 275 ° C. in the use environment. There was no such thing as the one that was done or the insulation type, and it was not put to practical use. Therefore, the present invention solves the problems that the above-described surface-mounted wire-wound resistor is weak under the use condition with thermal shock, and the problem that the surface-mounted wire-wound resistor generates a large amount of heat. It is also an object of the present invention to provide a surface-mounted wire-wound resistor having an insulating property and stable performance.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記目的を達
成するために、抵抗線が巻線されたベースの周面は熱伝
導性の良い耐熱性絶縁材料で成形被覆されており、前記
ベースの両端に端子が装着され、該各々の端子の一端は
前記抵抗線に導通され、該各々の端子の他端は実装され
るべき配線基板と水平になるように、且つ、成形被覆体
の底面と同一平面上になるように折り曲げられている面
実装形巻線抵抗器としたものである。According to the present invention, in order to achieve the above object, a peripheral surface of a base on which a resistance wire is wound is molded and coated with a heat-resistant insulating material having good thermal conductivity. Terminals are attached to both ends of the base, one end of each of the terminals is electrically connected to the resistance wire, and the other end of each of the terminals is horizontal with the wiring board to be mounted. This is a surface-mounted wire-wound resistor that is bent so as to be flush with the bottom surface.
【０００６】[0006]
【作用】以上のように、本発明の面実装形巻線抵抗器に
よれば、抵抗線と熱伝導性の良い耐熱絶縁材料で成形被
覆し、端子の先端と成形被覆体の底面とが同一平面上と
なるようにしたので、本発明の面実装形巻線抵抗器を配
線基板に実装したときに、抵抗線から発熱される熱は耐
熱性絶縁材料を伝わり、主として成形被覆体の底面を通
じて、成形被覆体の底面と接触している配線基板に放熱
され、抵抗器に熱が蓄熱されることがない。As described above, according to the surface-mounted wire-wound resistor of the present invention, the resistance wire and the heat-resistant insulating material having good thermal conductivity are molded and covered, and the tip of the terminal and the bottom surface of the molded cover are the same. Since it is arranged on a plane, when the surface mount type wire wound resistor of the present invention is mounted on a wiring board, the heat generated from the resistance wire is transmitted through the heat resistant insulating material, and mainly through the bottom surface of the molded cover. The heat is not radiated to the wiring board which is in contact with the bottom surface of the molded cover, and the heat is not stored in the resistor.
【０００７】[0007]
【実施例１】以下、本発明の実施例について図面を参照
しながら詳細に説明する。図１は本発明の実施例を示す
面実装形巻線抵抗器の断面図である。図１において、１
はアルミナ製の円柱のベースである。該ベース１にニッ
ケルクロム合金や銅ニッケル合金等の抵抗線３が巻線さ
れており、該ベース１の両端には端子２のキャップ部が
圧入により固定され、抵抗線３と各々の端子２とはスポ
ット溶接により溶接され電気的に接続されている。該ベ
ース１及び該各々の端子２について更に詳述すれば、ベ
ース１は図３ａの正面図及び、図３ｂの側面図に示すよ
うに円柱形である。また、各々の端子２は図４ａの正面
図及び、図４ｂの側面図に示すように、ベース１に嵌合
する椀状のキャップ部と長尺部とがつながったものであ
る。その各々の端子２の長尺部は、上側水平部と下側水
平部を垂直部がつないでおり、短冊を折り曲げたように
形成されている。この各々の端子２の先端（実装部分）
は抵抗器との反対側方向、または抵抗器側方向何れの方
向へ折り曲げられて延びていても良い。また、この各々
の端子２は複数の部材を溶接等によって接合して作成し
てもよい。Embodiment 1 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a surface-mounted wire-wound resistor showing an embodiment of the present invention. In FIG. 1, 1
Is a cylindrical base made of alumina. A resistance wire 3 made of nickel-chromium alloy, copper-nickel alloy or the like is wound around the base 1, and caps of terminals 2 are fixed to both ends of the base 1 by press fitting to connect the resistance wire 3 and each terminal 2 to each other. Are welded and electrically connected by spot welding. The base 1 and the respective terminals 2 will be described in more detail. The base 1 has a cylindrical shape as shown in the front view of FIG. 3a and the side view of FIG. 3b. As shown in the front view of FIG. 4a and the side view of FIG. 4b, each terminal 2 has a bowl-shaped cap portion fitted to the base 1 and a long portion connected to each other. The long part of each terminal 2 connects the upper horizontal part and the lower horizontal part with the vertical part, and is formed like a bent strip. Tip of each terminal 2 (mounting part)
May be bent and extended in the direction opposite to the resistor or in the resistor side direction. Further, each of the terminals 2 may be formed by joining a plurality of members by welding or the like.
【０００８】前記ベース１の周面は熱伝導性の良い耐熱
性絶縁材料、例えば、シリコーンモールドコンパウンド
で成形被覆されている。この成形被覆体４の底面と端子
２の先端の下側水平部は同一水平面上にあって、本発明
の面実装形巻線抵抗器を配線基板に実装したときに、前
記成形被覆体４の底面は配線基板と接触するので、熱伝
導性の良い成形被覆体４の底面から熱が配線基板を通っ
て放熱するようになっている。The peripheral surface of the base 1 is molded and covered with a heat-resistant insulating material having a good thermal conductivity, for example, a silicone mold compound. The bottom surface of the molding cover 4 and the lower horizontal portion of the tip of the terminal 2 are on the same horizontal plane, and when the surface mount type wire wound resistor of the present invention is mounted on a wiring board, Since the bottom surface is in contact with the wiring board, heat is radiated from the bottom surface of the molded cover 4 having good thermal conductivity through the wiring board.
【０００９】なお、成形被覆体４の材料としては熱伝導
性の良い耐熱性絶縁材料ならば何でも良いが、例えば、
シリコンモールドコンパウンド、アルミナ、ベリリア、
窒化アルミニウム、炭化珪素等を用いることができる。
次に、本発明の面実装形巻線抵抗器の製造方法を説明す
る。アルミナ製の円柱状のベース１を用意する。このベ
ース１上にニッケルクロム合金又は銅ニッケル合金等の
抵抗線３を巻線する。次に、前記ベース１の両端部に、
すでに２つの端子部材から溶接により製造された各々の
端子２を圧入して取り付ける。抵抗線３の両端と前記各
々の端子２とをスポット溶接等で溶接し電気的に接続す
る。次に、前記ベース１の周面をシリコーンモールドコ
ンパウンドで成形被覆することにより面実装形巻線抵抗
器を製造した。Any material may be used as the material for the molded cover 4 as long as it is a heat-resistant insulating material having good thermal conductivity.
Silicon mold compound, alumina, beryllia,
Aluminum nitride, silicon carbide or the like can be used.
Next, a method for manufacturing the surface mount type wound resistor of the present invention will be described. A cylindrical base 1 made of alumina is prepared. A resistance wire 3 of nickel-chromium alloy or copper-nickel alloy is wound on the base 1. Next, on both ends of the base 1,
Each terminal 2 already manufactured by welding from two terminal members is press-fitted and attached. Both ends of the resistance wire 3 and each of the terminals 2 are welded by spot welding or the like to be electrically connected. Next, the peripheral surface of the base 1 was molded and covered with a silicone mold compound to manufacture a surface-mounted wire-wound resistor.
【００１０】次に、本発明の面実装形巻線抵抗器の熱衝
撃試験を行なった。試験方法は、熱慣性の小さいジグに
取り付けた面実装形巻線抵抗器を、−６５℃で１５分間
保ち、引続き１５０℃で１５分間保ち、この低温の開始
から高温の終了までの間を１サイクルとする。１５０℃
に保ったときに定格電力の５０％に相当する直流電圧を
抵抗器に印加する。これを１０００サイクル繰り返し
た。このサイクル終了後の抵抗値の変化量は０．２％以
内であり、許容範囲内であった。そして、外観も異常は
みられなかった。また、絶縁抵抗はＤＣ１００Ｖで１０
００ＭΩ以上であった。これに対して、前記の従来品
（図２に示す）は２５０サイクル目位からしだいに外装
にクラックが生じ外観異常が発生した。Next, a thermal shock test was conducted on the surface-mounted wire-wound resistor of the present invention. The test method was to keep the surface-mounted wire-wound resistor attached to a jig with low thermal inertia at -65 ° C for 15 minutes and then at 150 ° C for 15 minutes. Cycle. 150 ° C
Then, a DC voltage corresponding to 50% of the rated power is applied to the resistor. This was repeated 1000 cycles. The amount of change in resistance value after the completion of this cycle was within 0.2%, which was within the allowable range. The appearance was not abnormal either. Also, the insulation resistance is DC100V 10
It was more than 00 MΩ. On the other hand, the above conventional product (shown in FIG. 2) had cracks in the outer casing from the 250th cycle, and abnormal appearance occurred.
【００１１】なお、本発明の面実装形巻線抵抗は、１Ｗ
未満の精密用から１Ｗ以上の電力用のものまでの広範囲
の製品に利用できるものである。The surface mount type winding resistor of the present invention is 1 W.
It can be used for a wide range of products from precision products of less than 1 W to electric power of 1 W or more.
【００１２】[0012]
【発明の効果】以上のように、本発明の面実装形巻線抵
抗器は、抵抗線と熱伝導性の良い耐熱性絶縁材料で被覆
した成形被覆体の底面と端子の先端とが同一平面上とな
るようにしたので、面実装形巻線抵抗器に発生した熱は
配線基板に放熱され蓄熱することがなく、繰り返し熱衝
撃を受けても、高信頼性が保たれる。また、クラック等
の外観異常が発生することがない。As described above, in the surface mount type wire wound resistor of the present invention, the bottom surface of the molded wire covered with the resistance wire and the heat resistant insulating material having good thermal conductivity and the tip of the terminal are flush with each other. With the above arrangement, the heat generated in the surface-mounted wire-wound resistor does not radiate to the wiring board and is not stored, and high reliability is maintained even when repeatedly subjected to thermal shock. Further, no abnormal appearance such as cracks occurs.
【図１】本発明の面実装形巻線抵抗器を示す。FIG. 1 illustrates a surface mount wound resistor of the present invention.
【図２】従来の巻線抵抗器を示す。FIG. 2 shows a conventional wirewound resistor.
【図３】本発明の面実装形巻線抵抗器のベースを示す。
ａは正面図、ｂは側面図である。FIG. 3 shows the base of the surface mount wound resistor of the present invention.
a is a front view and b is a side view.
【図４】本発明の面実装形巻線抵抗器の端子を示す。ａ
は正面図、ｂは側面図である。FIG. 4 shows the terminals of the surface mount wound resistor of the present invention. a
Is a front view and b is a side view.
１ ベース ２ 端子 ３ 抵抗線 ４ 成形被覆体 1 base 2 terminal 3 resistance wire 4 molding cover
Claims (1)
導性の良い耐熱性絶縁材料で成形被覆されており、前記
ベースの両端に端子が装着され、該各々端子の一端は前
記抵抗線に導通され、該各々端子の他端は実装されるべ
き配線基板と水平になるように、且つ、成形被覆体の底
面と同一平面上になるように折り曲げられている面実装
形巻線抵抗器。1. A peripheral surface of a base on which a resistance wire is wound is molded and coated with a heat-resistant insulating material having good thermal conductivity, terminals are attached to both ends of the base, and one end of each terminal is the above-mentioned. A surface-mounting type winding that is electrically connected to the resistance wire and is bent so that the other end of each terminal is horizontal with the wiring board to be mounted and is flush with the bottom surface of the molding cover. Resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27275292A JPH06124801A (en) | 1992-10-12 | 1992-10-12 | Surface-mount type wire wound reistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27275292A JPH06124801A (en) | 1992-10-12 | 1992-10-12 | Surface-mount type wire wound reistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06124801A true JPH06124801A (en) | 1994-05-06 |
Family
ID=17518264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27275292A Pending JPH06124801A (en) | 1992-10-12 | 1992-10-12 | Surface-mount type wire wound reistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06124801A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590709A (en) * | 2016-03-23 | 2016-05-18 | 东莞市爱伦电子科技有限公司 | A high-power resin-encapsulated metal film chip resistor |
| CN105590708A (en) * | 2016-03-23 | 2016-05-18 | 东莞市爱伦电子科技有限公司 | A high-power resin-encapsulated wire-wound chip resistor |
| JP2016184574A (en) * | 2015-03-25 | 2016-10-20 | スマート エレクトロニクス インク | Fuse resistor and manufacturing method thereof |
| JP2018026506A (en) * | 2016-08-12 | 2018-02-15 | スマート エレクトロニクス インク | Fuse resistor and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555777A (en) * | 1978-10-16 | 1980-04-23 | Nissei Ltd | Device for mechanically housing bicycle |
| JPS6332901A (en) * | 1986-05-19 | 1988-02-12 | フィリップス エレクトロニクス ノース アメリカ コーポレイション | Surface mount electric device |
-
1992
- 1992-10-12 JP JP27275292A patent/JPH06124801A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5555777A (en) * | 1978-10-16 | 1980-04-23 | Nissei Ltd | Device for mechanically housing bicycle |
| JPS6332901A (en) * | 1986-05-19 | 1988-02-12 | フィリップス エレクトロニクス ノース アメリカ コーポレイション | Surface mount electric device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016184574A (en) * | 2015-03-25 | 2016-10-20 | スマート エレクトロニクス インク | Fuse resistor and manufacturing method thereof |
| CN105590709A (en) * | 2016-03-23 | 2016-05-18 | 东莞市爱伦电子科技有限公司 | A high-power resin-encapsulated metal film chip resistor |
| CN105590708A (en) * | 2016-03-23 | 2016-05-18 | 东莞市爱伦电子科技有限公司 | A high-power resin-encapsulated wire-wound chip resistor |
| JP2018026506A (en) * | 2016-08-12 | 2018-02-15 | スマート エレクトロニクス インク | Fuse resistor and manufacturing method thereof |
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