JPH0812833B2 - Flyback transformer - Google Patents
Flyback transformerInfo
- Publication number
- JPH0812833B2 JPH0812833B2 JP63239985A JP23998588A JPH0812833B2 JP H0812833 B2 JPH0812833 B2 JP H0812833B2 JP 63239985 A JP63239985 A JP 63239985A JP 23998588 A JP23998588 A JP 23998588A JP H0812833 B2 JPH0812833 B2 JP H0812833B2
- Authority
- JP
- Japan
- Prior art keywords
- insulating film
- secondary coil
- coil bobbin
- wound
- flyback transformer
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000003822 epoxy resin Substances 0.000 description 13
- 229920000647 polyepoxide Polymers 0.000 description 13
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000001154 acute effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Details Of Television Scanning (AREA)
- Coils Or Transformers For Communication (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はテレビジョン受像機やコンピューター端末な
どのディスプレイに使用されるCRTに高電圧などを供給
するためのフライバックトランス（以下FBTと称す）に
関するものである。TECHNICAL FIELD The present invention relates to a flyback transformer (hereinafter referred to as FBT) for supplying a high voltage to a CRT used for a display such as a television receiver and a computer terminal. Is.
従来の技術 近年、電子部品に対して高度の信頼性が要求されるな
かでFBTに対しても高い信頼性が必要とされるようにな
っている。このような状況の中で、従来のFBTとしては
たとえば第５図に示すように構成されものが知られてい
る。2. Description of the Related Art In recent years, while high reliability is required for electronic parts, high reliability is also required for FBT. Under such circumstances, a conventional FBT having a structure as shown in FIG. 5 is known.
以下、図面に基づき説明すると、１は外周面が滑らか
な二次側コイルボビンで、この二次側コイルボビン１の
外周には絶縁フィルムが数回巻回されてなる絶縁フィル
ム層２を複数層備え、絶縁フィルム層２と絶縁フィルム
層２との間に整列巻きされたコイル３を備えて二次側コ
イルを構成している。前記絶縁フィルム層２のフィルム
４は第６図に示すように端面が鋭角に切断され、フィル
ム４の巻始め側部の両側端にはフィルム４の長手方向適
当間隔おきに円弧状の突起５が多数個並設され、またフ
ィルム４の巻終り側部の両側端にはコイル３の巻始めと
巻終りの部分を引っ掛けるためのＬ字状の切り欠き６が
フィルム４の長手方向適当間隔おきに複数個並設されて
いる。ところで、前記突起５は二次側コイルボビン１の
ほぼ１周の長さの範囲に相当する数（Ｎ＝L/P＝２πR/
P）設けられている。なお、Ｌは突起５の設けられてい
る長さ、Ｎは突起５の数、Ｐは突起５間のピッチであ
る。Hereinafter, with reference to the drawings, 1 is a secondary coil bobbin having a smooth outer peripheral surface, and a plurality of insulating film layers 2 formed by winding an insulating film several times around the outer periphery of the secondary coil bobbin 1 are provided. The insulating film layer 2 and the coil 3 wound in a line between the insulating film layer 2 are arranged to form a secondary coil. As shown in FIG. 6, the film 4 of the insulating film layer 2 has an end face cut at an acute angle, and arc-shaped projections 5 are formed at both ends of the winding start side of the film 4 at appropriate intervals in the longitudinal direction of the film 4. A large number of L-shaped notches 6 for hooking the winding start and winding end portions of the coil 3 are provided at both ends of the winding end side of the film 4 at appropriate intervals in the longitudinal direction of the film 4. Multiple pieces are installed side by side. By the way, the number of the protrusions 5 corresponds to the range of the length of one turn of the secondary coil bobbin 1 (N = L / P = 2πR /
P) It is provided. In addition, L is the length provided with the protrusions 5, N is the number of the protrusions 5, and P is the pitch between the protrusions 5.
発明が解決しようとする課題 しかし、このような構成のFBTでは二次側コイルの断
面が第５図に示すようになっており、FBTの製造工程で
予備加熱を行なったり、絶縁樹脂の硬化のための加熱を
行なったりするが、前記絶縁フィルム４は予備加熱など
で熱収縮し、第５図に示すように二次側コイルボビン１
に直接巻回される第１層目の絶縁フィルム層２が二次側
コイルボビン１の外周面に密着することになる。また、
前記予備加熱により二次側コイルボビン１および絶縁フ
ィルム４に含まれている水分が水蒸気となり、二次側コ
イルボビン１と第１層目の絶縁フィルム層２との間は密
着しているため水蒸気が残ったままとなる。特に、二次
側コイルボビン１と第１層目の絶縁フィルム層２との間
およびその外側に巻回される複数層の絶縁フィルム層2,
2間にエポキシ樹脂を注入するとき、第１層目の絶縁フ
ィルム層２の外側に巻回される複数層の絶縁フィルム層
2,2間にはコイル３が巻かれていることにより絶縁フィ
ルム層2,2間に隙間が存在し、その結果樹脂の注入がス
ムーズになされるが、二次側コイルボビン１と第１層目
の絶縁フィルム層２との間は前記突起５が形成されてい
る部分近傍を除いて密着しており、突起５が形成されて
いる部分近傍には樹脂は混入するが、他の部分への樹脂
の浸入は困難で、前記水蒸気が抜け切らないで残る。仮
に、二次側コイルボビン5.0gに0.05％吸水すると、予備
加熱により約3.1cm3の水蒸気となる。さらに、樹脂の注
型時の真空引きの真空度を1mmHgとすると、水蒸気は約2
360cm3に膨張するので、完全に蒸気を除去することは困
難である。そして、二次側コイルボビン１と絶縁フィル
ム層２との間に水蒸気が集中して残る場合と、前記エポ
キシ樹脂の硬化時、硬化発熱による温度上昇と粘度低下
により集中して残った水蒸気が大きく発泡し、エポキシ
樹脂内にボイドとして残る場合がある。このように水蒸
気が集中してあるいはボイドが残ると、FBTは高電圧（1
5〜35KV）を発生することにより、絶縁破壊不良を起こ
すという問題があった。However, in the FBT having such a structure, the cross section of the secondary coil is as shown in FIG. 5, and it is possible to perform preheating in the manufacturing process of the FBT or to cure the insulating resin. However, the insulating film 4 is thermally contracted by preheating, etc., and the secondary coil bobbin 1 is heated as shown in FIG.
The first insulating film layer 2 wound directly on the outer peripheral surface of the secondary coil bobbin 1 comes into close contact with the outer peripheral surface of the secondary coil bobbin 1. Also,
By the preheating, the water content in the secondary coil bobbin 1 and the insulating film 4 becomes steam, and the steam remains because the secondary coil bobbin 1 and the first insulating film layer 2 are in close contact with each other. Will remain. In particular, a plurality of insulating film layers 2 wound between the secondary coil bobbin 1 and the first insulating film layer 2 and on the outside thereof,
When injecting an epoxy resin between the two, a plurality of insulating film layers wound around the first insulating film layer 2
Since the coil 3 is wound between the 2 and 2, there is a gap between the insulating film layers 2 and 2, and as a result, the resin is smoothly injected, but the secondary coil bobbin 1 and the first layer Is in close contact with the insulating film layer 2 except for the vicinity of the portion where the protrusion 5 is formed, and resin is mixed in the vicinity of the portion where the protrusion 5 is formed. Is difficult to penetrate, and the water vapor remains without being completely exhausted. If 5.0% of secondary coil bobbin absorbs 0.05% of water, it will become about 3.1 cm 3 of water vapor by preheating. Furthermore, if the vacuum degree of vacuuming when casting the resin is 1 mmHg, the water vapor will be about 2
Since it expands to 360 cm 3 , it is difficult to completely remove the vapor. Then, when water vapor is concentrated and left between the secondary coil bobbin 1 and the insulating film layer 2, and when the epoxy resin is cured, the water vapor concentrated and left due to temperature rise and viscosity decrease due to heat generation of curing is largely foamed. However, it may remain as a void in the epoxy resin. If water vapor is concentrated or voids remain in this way, the FBT will
5 to 35 KV), there was a problem of causing dielectric breakdown failure.
本発明はこのような問題を解決するもので、二次側コ
イルボビンと第１層目の絶縁フィルム層との間の水蒸気
が残ったり樹脂中にボイドが残ったりするのを抑え、信
頼性の高いFBTを提供することを目的とするものであ
る。The present invention solves such a problem, and suppresses the remaining water vapor between the secondary coil bobbin and the first insulating film layer and the voids remaining in the resin, which is highly reliable. The purpose is to provide FBT.
課題を解決するための手段 この問題を解決するために本発明は、二次側コイルボ
ビンの外周面に複数本の環状のリブまたは溝を前記二次
側コイルボビンの長手方向に設けるとともに、前記リブ
または溝を覆うように第１層目の絶縁フィルムを巻回し
たものである。また本発明は、二次側コイルボビンの外
周面に螺旋状のリブまたは溝を設けるとともに、前記リ
ブまたは溝を覆うように第１層目の絶縁フィルムを巻回
したものである。Means for Solving the Problem In order to solve this problem, the present invention provides a plurality of annular ribs or grooves on the outer peripheral surface of a secondary coil bobbin in the longitudinal direction of the secondary coil bobbin, and the rib or The insulating film of the first layer is wound so as to cover the groove. Further, according to the present invention, a spiral rib or groove is provided on the outer peripheral surface of the secondary coil bobbin, and the first insulating film is wound so as to cover the rib or groove.
作用 この構成により、二次側コイルボビンと第１層目の絶
縁フィルム層との間に隙間ができ、その隙間の内部の水
蒸気はエポキシ樹脂充填時に除去されやすくなり、また
エポキシ樹脂の注入も良好に行なえる。水蒸気や、水蒸
気に起因するボイドがエポキシ樹脂内に残った場合も、
リブまたは溝により寸断され、集中して残ることはな
い。Function With this configuration, a gap is formed between the secondary coil bobbin and the first insulating film layer, water vapor inside the gap is easily removed when the epoxy resin is filled, and the epoxy resin is injected well. I can do it. When water vapor or voids caused by water vapor remain in the epoxy resin,
It is cut off by ribs or grooves and does not remain concentrated.
実施例 以下、本発明の実施例について、図面に基づいて説明
する。Example Hereinafter, an example of the present invention will be described with reference to the drawings.
まず、第１図〜第３図に示す第１実施例について説明
すると、11は二次側コイルボビンで、このボビン11の外
周面にはボビン11の軸芯方向適当間隔おきに多数本のリ
ブ12が環状に突設されている。このリブ12の高さは0.1
〜0.3mm、ピッチは0.2〜1.0mmで設けられている。前記
二次側コイルボビン11の外周には前記従来例と同様絶縁
フィルムが数回巻回されてなる絶縁フィルム層13を複数
層備え、絶縁フィルム層13,13間には整列巻きされたコ
イル14を備えている。15は二次側コイルボビン11と第１
層目の絶縁フィルム層13およびこの第１層目の絶縁フィ
ルム層13の外側に巻回される複数層の絶縁フィルム層1
3,13間に注入されるエポキシ樹脂である。16は絶縁フィ
ルムの巻始め側部の両側端にフィルム長手方向適当間隔
おきに設けた円弧状の突起である。First, the first embodiment shown in FIGS. 1 to 3 will be described. 11 is a secondary coil bobbin, and a large number of ribs 12 are provided on the outer peripheral surface of the bobbin 11 at appropriate intervals in the axial direction of the bobbin 11. Are projected annularly. The height of this rib 12 is 0.1
~ 0.3mm, pitch is 0.2 ~ 1.0mm. The secondary coil bobbin 11 has a plurality of insulating film layers 13 formed by winding an insulating film several times around the outer periphery of the secondary coil bobbin 11, and the insulating film layers 13 and 13 have a coil 14 aligned and wound between them. I have it. 15 is the secondary coil bobbin 11 and the first
The insulating film layer 13 of the first layer and a plurality of insulating film layers 1 wound around the insulating film layer 13 of the first layer
Epoxy resin injected between 3 and 13. Reference numerals 16 are arc-shaped projections provided at both ends of the winding start side of the insulating film at appropriate intervals in the longitudinal direction of the film.
上記のように第１実施例によれば、二次側コイルボビ
ン11と第１層目の絶縁フィルム層13との間にはリブ12が
存在するため隙間ができ、二次側コイルボビン11および
絶縁フィルム層13に含まれる水分が加熱されることによ
り発生する水蒸気はエポキシ樹脂充填時の真空引きによ
る脱気で除去されやくすくなり、また毛細管現象により
エポキシ樹脂15の注入は良好に行なえる。なお、仮に二
次側コイルボビン11と第１層目の絶縁フィルム層13との
間に水蒸気が残った場合でもリブ12があることにより分
離し、水蒸気が集中することがなくなり、その結果エポ
キシ樹脂15内で大きなボイドとして残ることがなくな
り、信頼性の向上を図ることができる。As described above, according to the first embodiment, since the ribs 12 are present between the secondary coil bobbin 11 and the first insulating film layer 13, a gap is formed, and the secondary coil bobbin 11 and the insulating film are formed. Water vapor generated by heating the water contained in the layer 13 is easily removed by degassing by vacuuming when filling the epoxy resin, and the epoxy resin 15 can be injected well by the capillary phenomenon. Even if water vapor remains between the secondary coil bobbin 11 and the first insulating film layer 13, the ribs 12 separate the water vapor from the secondary coil bobbin 11 to prevent the water vapor from concentrating. As a result, the epoxy resin 15 Large voids do not remain inside, and reliability can be improved.
ところで上記第１実施例において、リブ12は互いに独
立した環状に形成されているが、ねじ山状に沿った形状
（螺旋状）に形成することも可能である。また、第４図
に示すようにリブ12の代りに二次側コイルボビン11の外
周面に溝17を設けるようにしてもリブ12を設ける場合と
同様の効果を得ることができる。この溝17を設ける場合
でも螺旋状に形成しても良い。By the way, in the first embodiment, the ribs 12 are formed in a ring shape independent of each other, but it is also possible to form the ribs 12 in a shape along the thread shape (spiral shape). Further, as shown in FIG. 4, even if the groove 17 is provided on the outer peripheral surface of the secondary coil bobbin 11 instead of the rib 12, the same effect as when the rib 12 is provided can be obtained. Even when the groove 17 is provided, it may be formed in a spiral shape.
発明の効果 以上のように本発明によれば、二次側コイルボビンと
それに直接接する絶縁フィルムとの間の水蒸気はエポキ
シ樹脂の充填時に除去されやすくなり、水蒸気や、水蒸
気に起因するボイドがエポキシ樹脂内に残ることは防止
される。仮に、水蒸気やボイドが残ったとしても、リブ
または溝の存在により、集中して残ることはないので、
エポキシ樹脂の含浸性を向上させることができ、FBTの
信頼性の向上につながる。さらには、二次側コイルボビ
ンと第１層目の絶縁フィルムとの間の隙間を通して予備
加熱時の水分の抜けが良好に行なわれ、予備加熱の時間
を短縮させ得、FBTの生産性の向上を図ることができ
る。As described above, according to the present invention, water vapor between the secondary coil bobbin and the insulating film in direct contact with the secondary coil bobbin is easily removed when the epoxy resin is filled. Remaining inside is prevented. Even if water vapor or voids remain, they do not remain concentrated because of the presence of the ribs or grooves.
The impregnation property of epoxy resin can be improved, which leads to the improvement of the reliability of FBT. In addition, moisture can be satisfactorily drained during preheating through the gap between the secondary coil bobbin and the first-layer insulating film, and the preheating time can be shortened, improving FBT productivity. Can be planned.
第１図〜第３図は本発明の第１実施例を示すもので、第
１図はFBTの正面図、第２図は同要部拡大断面図、第３
図は二次側コイルボビンの要部斜視図、第４図は本発明
の第２実施例における二次側コイルボビンの断面図、第
５図および第６図は従来例を示し、第５図はFBTの要部
断面図、第６図は絶縁フィルムの斜視図である。 11…二次側コイルボビン、12…リブ、13…絶縁フィルム
層、14…コイル、15…エポキシ樹脂、16…突起、17…
溝。1 to 3 show a first embodiment of the present invention. FIG. 1 is a front view of an FBT, FIG.
FIG. 4 is a perspective view of a main part of the secondary coil bobbin, FIG. 4 is a sectional view of the secondary coil bobbin in the second embodiment of the present invention, FIGS. 5 and 6 show a conventional example, and FIG. And FIG. 6 is a perspective view of the insulating film. 11 ... Secondary coil bobbin, 12 ... Rib, 13 ... Insulating film layer, 14 ... Coil, 15 ... Epoxy resin, 16 ... Protrusion, 17 ...
groove.
Claims (2)
が数回巻回されてなる絶縁フィルム層を複数層備え、前
記絶縁フィルム層間に整列巻きされたコイルを備えてな
るフライバックトランスであって、前記二次側コイルボ
ビンの外周面に複数本の環状のリブまたは溝を前記二次
側コイルボビンの長手方向に設けるとともに、前記リブ
または溝を覆うように第１層目の絶縁フィルムを巻回し
たフライバックトランス。1. A flyback transformer comprising a plurality of insulating film layers formed by winding an insulating film several times around the outer circumference of a secondary coil bobbin, and a coil wound in a line between the insulating film layers. A plurality of annular ribs or grooves are provided on the outer peripheral surface of the secondary coil bobbin in the longitudinal direction of the secondary coil bobbin, and a first insulating film is wound so as to cover the ribs or grooves. Flyback transformer.
が数回巻回されてなる絶縁フィルム層を複数層備え、前
記絶縁フィルム層間に整列巻きされたコイルを備えてな
るフライバックトランスであって、前記二次側コイルボ
ビンの外周面に螺旋状のリブまたは溝を設けるととも
に、前記リブまたは溝を覆うように第１層目の絶縁フィ
ルムを巻回したフライバックトランス。2. A flyback transformer comprising a plurality of insulating film layers formed by winding an insulating film around an outer periphery of a secondary coil bobbin, and a coil wound in a line between the insulating film layers. A flyback transformer in which a spiral rib or groove is provided on an outer peripheral surface of the secondary coil bobbin, and a first-layer insulating film is wound so as to cover the rib or groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63239985A JPH0812833B2 (en) | 1988-09-26 | 1988-09-26 | Flyback transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63239985A JPH0812833B2 (en) | 1988-09-26 | 1988-09-26 | Flyback transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0287507A JPH0287507A (en) | 1990-03-28 |
| JPH0812833B2 true JPH0812833B2 (en) | 1996-02-07 |
Family
ID=17052761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63239985A Expired - Lifetime JPH0812833B2 (en) | 1988-09-26 | 1988-09-26 | Flyback transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0812833B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005101570A (en) * | 2003-08-26 | 2005-04-14 | Matsushita Electric Ind Co Ltd | Flyback transformer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5846409U (en) * | 1981-09-25 | 1983-03-29 | 日本ビクター株式会社 | coil bobbin |
| JPS61110409A (en) * | 1984-11-05 | 1986-05-28 | Matsushita Electric Ind Co Ltd | flyback transformer |
| JPS61160911A (en) * | 1985-01-10 | 1986-07-21 | Matsushita Electric Ind Co Ltd | Fly-back transformer |
-
1988
- 1988-09-26 JP JP63239985A patent/JPH0812833B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0287507A (en) | 1990-03-28 |
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| JPS58202520A (en) | Manufacture of resin molded coil | |
| JPS603765B2 (en) | Manufacturing method of cast coil |
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