JPH02256202A - High voltage variable resistor - Google Patents

High voltage variable resistor

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Publication number
JPH02256202A
JPH02256202A JP1141685A JP14168589A JPH02256202A JP H02256202 A JPH02256202 A JP H02256202A JP 1141685 A JP1141685 A JP 1141685A JP 14168589 A JP14168589 A JP 14168589A JP H02256202 A JPH02256202 A JP H02256202A
Authority
JP
Japan
Prior art keywords
insulating
case
high voltage
insulating resin
variable resistor
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
Application number
JP1141685A
Other languages
Japanese (ja)
Inventor
Yasufumi Ashitaka
芦高 康文
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of JPH02256202A publication Critical patent/JPH02256202A/en
Pending legal-status Critical Current

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  • Details Of Television Scanning (AREA)
  • Details Of Resistors (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

PURPOSE:To improve voltage resistance reliability by providing an insulating partition wall for shielding insulating resin between a high voltage section of an electric circuit of an insulating board and the inner wall of a case. CONSTITUTION:An insulating partition wall 11 is provided between a high voltage section of an electric circuit of a board 1 and the inner wall of a case 5, and engaged fixedly by a connector 5a in an insulation case 5 and a connector 11a of the wall 11. A high voltage input outer connection terminal 13 is connected to a high voltage section of a flyback transformer 14, an electric circuit 1' composed of a resistor 2, electrodes 3, is provided on the board 1, assembled in a state that an operation knob 6 secured with a brush 7 at its end is rotatably supported in the case 3, the board 1 is contained in the case 5, and fixedly sealed with adhesive. Then, insulation resin 8 is filled in the case, and cured. After a high voltage variable resistor is engaged and sealed in the flyback transformer case, it is filled and cured with insulation resin together with components such as coils for forming the transformer. Thus, voltage resistance reliability can be improved.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、カラーテレビ受像機等に用いられる高圧用可
変抵抗器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high voltage variable resistor used in color television receivers and the like.

従来の技術 従来の技術を第8図〜第11図の高圧用可変抵抗器によ
り説明する。第8図は側断面図であり、第9図は平面図
であり、第10図は同高圧用可変抵抗器をフライバック
トランスに取り付は封止している状態を示す断面図であ
り、第11図は第10図の要部を示す断面図である。
2. Description of the Related Art The prior art will be explained with reference to high-voltage variable resistors shown in FIGS. 8 to 11. FIG. 8 is a side sectional view, FIG. 9 is a plan view, and FIG. 10 is a sectional view showing the high voltage variable resistor installed and sealed in a flyback transformer. FIG. 11 is a sectional view showing the main part of FIG. 10.

第8図〜第11図において、lは磁器製絶縁基板で、そ
の表面には可変抵抗部および固定抵抗部よりなる抵抗体
2と電極3等により電気回路1′が形成される。4は外
部接続用端子で、電極3に接続固定される。13は高圧
入力用外部接続端子であり、後述するフライバックトラ
ンスの高電圧部に接続される。5は絶縁樹脂からなる成
形のケースで、操作つまみ6を透孔を通して回転自在に
支持しており、この操作つまみ6の先端には刷子7が固
着されこの刷子7は抵抗体2上の可変抵抗部を摺接して
いる。ケースS内には前期絶縁基板1が接着剤(図示せ
ず)により上記可変抵抗部を密封するように装着されて
いる。8は充填された絶縁樹脂である。
In FIGS. 8 to 11, reference numeral 1 denotes a ceramic insulating substrate, on the surface of which an electric circuit 1' is formed by a resistor 2 consisting of a variable resistance section and a fixed resistance section, an electrode 3, etc. Reference numeral 4 denotes an external connection terminal, which is connected and fixed to the electrode 3. Reference numeral 13 denotes an external connection terminal for high voltage input, which is connected to a high voltage section of a flyback transformer to be described later. 5 is a molded case made of insulating resin, which rotatably supports an operating knob 6 through a through hole; a brush 7 is fixed to the tip of the operating knob 6; The parts are in sliding contact. The insulating substrate 1 is mounted inside the case S with an adhesive (not shown) so as to seal the variable resistance section. 8 is a filled insulating resin.

第10図は上記の高圧用可変抵抗器がフライバックトラ
ンス14と一体化されていることを示す断面図である。
FIG. 10 is a sectional view showing that the above-mentioned high voltage variable resistor is integrated with the flyback transformer 14.

即ち、フライバックトランスの絶縁ケース9に高圧用可
変抵抗器のケース5を嵌合封止後、絶縁樹脂10を充填
・硬化し、一体化するものである。
That is, after the case 5 of the high-voltage variable resistor is fitted and sealed into the insulating case 9 of the flyback transformer, the insulating resin 10 is filled and cured, and the two are integrated.

発明が解決しようとする課題 しかしながら、上記従来の高圧用可変抵抗器ではフライ
バックトランスと一体化後の高圧用可変抵抗器ケース表
面までの絶縁製が低いものであった。即ち、第11図で
示す高圧用可変抵抗器の絶縁樹脂8とフライバックトラ
ンス14の絶縁樹脂10の間に相互の接着力の弱い界面
イが生じ、この界面イを通し高圧用可変抵抗器ケース表
面Gへと絶縁破壊が生じるためである。このような現象
は高圧用可変抵抗器の絶縁樹脂8とフライバックトラン
ス14の絶縁樹脂10との組合せと樹脂の吸湿度により
大きく左右され、可変抵抗器の絶縁樹脂8が硬化してい
る上から未硬化の絶縁樹脂10を充填硬化させるため、
両樹脂間の界面の耐電圧は他部に比較して弱く、高電圧
での信頼性を低下させるものであった。
Problems to be Solved by the Invention However, in the conventional high-voltage variable resistor described above, the insulation up to the surface of the high-voltage variable resistor case after integration with the flyback transformer was low. That is, an interface A with weak mutual adhesion is created between the insulating resin 8 of the high-voltage variable resistor and the insulating resin 10 of the flyback transformer 14 shown in FIG. 11, and the high-voltage variable resistor case This is because dielectric breakdown occurs to the surface G. This phenomenon is largely influenced by the combination of the insulating resin 8 of the high-voltage variable resistor and the insulating resin 10 of the flyback transformer 14, and the moisture absorption of the resin. In order to fill and harden the uncured insulating resin 10,
The withstand voltage at the interface between both resins was weaker than at other parts, reducing reliability at high voltages.

本発明はこのような従来の課題を解決するものであり、
高圧用可変抵抗器とフライバックトランスの2つの樹脂
量界面での耐電圧を向上させた高信頼の高電圧用可変抵
抗器を提供することを目的とするものである。
The present invention solves these conventional problems,
It is an object of the present invention to provide a highly reliable high-voltage variable resistor with improved withstand voltage at the interface between the two resin amounts of the high-voltage variable resistor and the flyback transformer.

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、絶縁基板の電気回
路の高電圧部分とケース内壁との間に絶縁樹脂をさえぎ
る絶縁仕切壁を設けるようにしたものである。
Means for Solving the Problems In order to achieve the above object, the present invention provides an insulating partition wall that blocks the insulating resin between the high voltage portion of the electric circuit of the insulating substrate and the inner wall of the case.

作用 上記の構成により、高圧用可変抵抗器をフライバックト
ランスと一体化後絶縁樹脂充填した際、高圧用可変抵抗
器の絶縁樹脂とフライバックトランスの充填絶縁樹脂間
に生じる界面を仕切壁にて分断することにより絶縁性の
向上を図ったものである。
Effect With the above configuration, when a high-voltage variable resistor is integrated with a flyback transformer and then filled with insulating resin, the interface between the insulating resin of the high-voltage variable resistor and the filler insulating resin of the flyback transformer is separated by a partition wall. The insulation is improved by dividing it.

実施例 本発明を一実施例である第1図〜第4図の高圧用可変抵
抗器により説明する。第1図は同側断面図であり、第2
図は同平面図であり、第3図aは同高圧用可変抵抗器が
フライバックトランスに取付けられた状態を示す図であ
り、第3図すは同高圧用可変抵抗器が取付けられフライ
バックトランスに封止されている状態を示す断面図であ
り、第4図は第3図すの要部を示、す断面図であり、従
来例と同一部分については同一番号を付与し、説明は省
略する。
Embodiment The present invention will be explained using a high-voltage variable resistor shown in FIGS. 1 to 4 as an embodiment. FIG. 1 is a sectional view of the same side, and the second
3A is a plan view of the same, FIG. FIG. 4 is a sectional view showing the main parts of FIG. Omitted.

第1図〜第4図によると、11は基板1の電気回路の高
圧部分とケース5の内壁間に設けられた絶縁仕切りであ
り、絶縁ケース5内の係止部5aと絶縁仕切壁11の係
止部11aとにより嵌合固定している。13は高圧入力
用の外部接続端子でありフライバックトランス14の高
電圧部に接続される。基板1上には可変抵抗部、固定抵
抗部よりなる抵抗体2と電極3等で構成される電気回路
l°が設けられ、先端に刷子7を固着した操作つまみ6
をケース5内に回転自在に支持された状態で組み立てた
上から、基板1をケース5内に収納し接着剤により固定
封止する。この後、ケース内に絶縁樹脂8を充填硬化さ
せる。次に、第3図a、bの如く高圧入力端子13をフ
ライパックトランス高圧出力部に接続し、フライバック
トランスケース9に高圧用可変抵抗器を嵌合封止後、フ
ライバックトランスを構成するコイル等の部品とともに
、絶縁樹脂10で充填硬化する。
According to FIGS. 1 to 4, reference numeral 11 is an insulating partition provided between the high-voltage part of the electric circuit of the board 1 and the inner wall of the case 5. It is fitted and fixed by the locking part 11a. Reference numeral 13 is an external connection terminal for high voltage input, and is connected to the high voltage section of the flyback transformer 14. On the substrate 1, there is provided an electric circuit 1° consisting of a resistor 2 consisting of a variable resistance section and a fixed resistance section, an electrode 3, etc., and an operation knob 6 with a brush 7 fixed to the tip.
After the substrate 1 is assembled in a state where it is rotatably supported in the case 5, the substrate 1 is housed in the case 5 and fixedly sealed with an adhesive. Thereafter, the insulating resin 8 is filled and hardened into the case. Next, as shown in Fig. 3a and b, the high voltage input terminal 13 is connected to the flypack transformer high voltage output part, and after fitting and sealing the high voltage variable resistor to the flyback transformer case 9, the flyback transformer is constructed. It is filled and hardened with insulating resin 10 together with parts such as the coil.

第4図は樹脂充填硬化後のフライバックトランスの要部
断面図であるが高圧用可変抵抗器の絶縁樹脂8の表面お
よび絶縁仕切壁11の絶縁樹脂8より突き出した部分は
絶縁樹脂10により覆われており、高圧入力用外部接続
端子13からケース5の表面Cに至る沿面は第4図中の
要素沿面イ。
FIG. 4 is a sectional view of the main parts of the flyback transformer after resin filling and hardening. The creepage from the high-voltage input external connection terminal 13 to the surface C of the case 5 is element creepage A in FIG.

口、ハ、二により構成されることになる。It will be composed of 口, ha, and 2.

また、第5図〜第7図は本発明の他の実施例であり、第
5図は同側断面図であり、第6図は同平面図であり、第
7図は同高圧用可変抵抗器をフライバックトランスに取
付は封止された状態の要部を示す断面図であり、第1図
〜第4図の発明と同一部分については同一番号を付与し
、説明は省略して説明する。
5 to 7 show other embodiments of the present invention, FIG. 5 is a sectional view of the same side, FIG. 6 is a plan view of the same, and FIG. 7 is a high voltage variable resistor. The attachment of the device to the flyback transformer is a sectional view showing the main parts in a sealed state, and the same parts as in the invention of Figs. 1 to 4 are given the same numbers and the explanation will be omitted. .

第5図〜第7図によると、15は基板1の電気回路の高
圧部分とケース5の内壁間に上記5の底面および内壁と
一体に形成された絶縁仕切壁である。なお、この基板1
は接着剤により固定封止し、絶縁樹脂8を充填硬化させ
るが、この時ケース5の内壁と絶縁仕切壁15で形成さ
れる空間部16には絶縁樹脂8は充填せずに高圧用可変
抵抗器を形成している。
According to FIGS. 5 to 7, reference numeral 15 is an insulating partition wall formed integrally with the bottom surface and inner wall of the case 5 between the high voltage portion of the electric circuit of the board 1 and the inner wall of the case 5. Note that this board 1
is fixed and sealed with adhesive, and filled with insulating resin 8 and hardened. However, at this time, the space 16 formed by the inner wall of case 5 and insulating partition wall 15 is not filled with insulating resin 8, and is filled with high voltage variable resistor. It forms a vessel.

第7図は樹脂充填硬化後のフライバックトランスの要部
断面図であるが高圧用可変抵抗器の絶縁樹脂8の表面お
よび絶縁仕切壁15の絶縁樹脂8より突き出した部分お
よび上記空間部16は絶縁樹脂10により覆われており
、高圧入力用の外部接続端子13からケース5の表面C
に至る沿面は第4図中の要素沿面ホ、へ、ト、チにより
構成されることになり、絶縁仕切壁15によって形成さ
れた要素沿面トによって第1図〜第4図で示す本発明の
実施例により沿面距離を大きく増加できるとともに、上
記空間部16には絶縁樹脂10のみ充填されて、絶縁樹
脂8および10の界面部がないので、この部分において
界面部に起る耐電圧の劣化はな(、耐電圧特性の向上を
図れるものである。
FIG. 7 is a cross-sectional view of the main parts of the flyback transformer after resin filling and hardening. Covered with insulating resin 10, the surface C of case 5 is connected from external connection terminal 13 for high voltage input.
The creeping surface leading to the surface of the present invention shown in FIGS. According to the embodiment, the creepage distance can be greatly increased, and since the space 16 is filled with only the insulating resin 10 and there is no interface between the insulating resins 8 and 10, the deterioration of the withstand voltage that occurs at the interface in this area is prevented. (It is possible to improve the withstand voltage characteristics.

発明の効果 以上のように、本発明によれば、絶縁基板の電気回路の
高圧部と絶縁ケース内壁との間に絶縁仕切壁を設けるこ
とにより、絶縁仕切壁は可変抵抗器の絶縁樹脂とフライ
バックトランスの絶縁樹脂のそれぞれに密着して充填さ
れているので、耐電圧信頼性を向上させることができる
。また、高圧用可変抵抗器に使用する絶縁樹脂と更にそ
の上に充填される第2の絶縁樹脂との間に生じる密着力
の弱い界面の耐電圧に対する悪影響を低減し耐電圧信頼
性を向上させることができるものである。
Effects of the Invention As described above, according to the present invention, by providing an insulating partition wall between the high-voltage part of the electric circuit of the insulating substrate and the inner wall of the insulating case, the insulating partition wall is able to connect with the insulating resin of the variable resistor. Since it is filled in close contact with each insulating resin of the back transformer, the reliability withstand voltage can be improved. In addition, it reduces the negative effect on the withstand voltage of the interface with weak adhesion that occurs between the insulating resin used in the high-voltage variable resistor and the second insulating resin filled on top of it, improving the withstand voltage reliability. It is something that can be done.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例である高圧用可変抵抗器の側
断面図であり、第2図は同平面図であり、第3図aは同
高圧用可変抵抗器をフライバックトランスに取付けた状
態を示す図であり、第3図すは同断面図であり、第4図
は第3図すの要部を示す断面図であり、第5図は本発明
の他の実施例である高圧用可変抵抗器の側断面図であり
、第6図は同平面図であり、第7図は同高圧用可変抵抗
器をフライバックトランスに取付けた状態の要部を示す
断面図であり、第8図は従来の高圧用可変抵抗器の側断
面図であり、第9図は同平面図であり、第10図は同高
圧用可変抵抗器をフライバックトランスに取付けた状態
を示す断面図であり、第11図は同要部断面図である。 1・・・・・・絶縁基板、2・・・・・・抵抗体、5・
・・・・・ケース、6・・・・・・つまみ、7・・・・
・・刷子、8・・・・・・絶縁樹脂、10・・・・・・
絶縁樹脂、11・・・・・・絶縁仕切壁。 代理人の氏名 弁理士 粟野重孝 ほか1名区 υつ 埋 凹 罐
Fig. 1 is a side cross-sectional view of a high-voltage variable resistor that is an embodiment of the present invention, Fig. 2 is a plan view of the same, and Fig. 3a shows the same high-voltage variable resistor as a flyback transformer. FIG. 3 is a sectional view of the installed state, FIG. 4 is a sectional view of the main part of FIG. 3, and FIG. 5 is a sectional view of another embodiment of the present invention. FIG. 6 is a side sectional view of a certain high-voltage variable resistor, FIG. 6 is a plan view thereof, and FIG. 7 is a sectional view showing the main parts of the same high-voltage variable resistor installed in a flyback transformer. , FIG. 8 is a side cross-sectional view of a conventional high-voltage variable resistor, FIG. 9 is a plan view of the same, and FIG. 10 is a cross-sectional view of the same high-voltage variable resistor installed in a flyback transformer. FIG. 11 is a sectional view of the same essential part. 1... Insulating substrate, 2... Resistor, 5...
...Case, 6...Knob, 7...
...Brush, 8...Insulating resin, 10...
Insulating resin, 11...Insulating partition wall. Name of agent: Patent attorney Shigetaka Awano and 1 other person

Claims (2)

【特許請求の範囲】[Claims] (1)表面に抵抗体などにより形成された電気回路を有
する絶縁基板と、この絶縁基板を収納する絶縁ケースと
、この絶縁ケースに回転可能に支持され、先端に上記抵
抗体上を摺接する刷子を装着したつまみと、上記絶縁ケ
ース内に充填された絶縁樹脂と、少なくとも、上記絶縁
基板上の電気回路の高圧部分と上記絶縁ケースの内壁間
に、上記絶縁樹脂より突出し、フライバックトランスに
装着され、このフライバックトランス内に絶縁樹脂を充
填した時、この絶縁樹脂内に突出する絶縁仕切壁より構
成されて成る高圧用可変抵抗器。
(1) An insulating substrate that has an electric circuit formed by a resistor on its surface, an insulating case that houses the insulating substrate, and a brush that is rotatably supported by the insulating case and whose tip slides on the resistor. The knob equipped with the insulating resin, the insulating resin filled in the insulating case, and at least between the high voltage part of the electric circuit on the insulating substrate and the inner wall of the insulating case protrudes from the insulating resin and is attached to the flyback transformer. A high-voltage variable resistor comprising an insulating partition wall that protrudes into the insulating resin when the flyback transformer is filled with insulating resin.
(2)表面に抵抗体などにより形成された電気回路を有
する絶縁基板と、この絶縁基板を収納する絶縁ケースと
、この絶縁ケースに回転可能に支持され、先端に上記抵
抗体上を摺接する刷子を装着したつまみと、上記絶縁ケ
ース内に充填された絶縁樹脂と、少なくとも、上記絶縁
基板上の電気回路の高圧部分と上記絶縁ケースの内壁間
に、上記絶縁樹脂が充填されない空間部を形成するよう
に上記絶縁ケースの底面および内壁と一帯に上記絶縁樹
脂より突出し、フライバックトランスに装着され、この
フライバックトランス内に絶縁樹脂を充填した時、上記
空間部内にこの絶縁樹脂を充填するように設けられた絶
縁仕切壁より構成されてなる高圧用可変抵抗器。
(2) An insulating substrate that has an electric circuit formed by a resistor on its surface, an insulating case that houses the insulating substrate, and a brush that is rotatably supported by the insulating case and whose tip slides on the resistor. forming a space in which the insulating resin is not filled between the knob equipped with the insulating resin, the insulating resin filled in the insulating case, and at least the high-voltage part of the electric circuit on the insulating substrate and the inner wall of the insulating case. The insulating resin protrudes from the bottom surface and inner wall of the insulating case and is attached to the flyback transformer, so that when the flyback transformer is filled with the insulating resin, the space is filled with the insulating resin. A high voltage variable resistor consisting of an insulating partition wall.
JP1141685A 1988-12-05 1989-06-02 High voltage variable resistor Pending JPH02256202A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP30738088 1988-12-05
JP63-307380 1988-12-05

Publications (1)

Publication Number Publication Date
JPH02256202A true JPH02256202A (en) 1990-10-17

Family

ID=17968360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1141685A Pending JPH02256202A (en) 1988-12-05 1989-06-02 High voltage variable resistor

Country Status (1)

Country Link
JP (1) JPH02256202A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04225506A (en) * 1990-12-27 1992-08-14 Murata Mfg Co Ltd Flyback transformer
JPH04120212U (en) * 1991-04-15 1992-10-27 株式会社村田製作所 flyback transformer
JPH04121714U (en) * 1991-04-18 1992-10-30 株式会社日立水沢エレクトロニクス flyback transformer
JPH08130140A (en) * 1995-04-10 1996-05-21 Hokuriku Electric Ind Co Ltd Fly-back transformer
KR100235765B1 (en) * 1995-10-24 1999-12-15 무라타 야스타카 Variable Resistor for High Voltage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04225506A (en) * 1990-12-27 1992-08-14 Murata Mfg Co Ltd Flyback transformer
JPH04120212U (en) * 1991-04-15 1992-10-27 株式会社村田製作所 flyback transformer
JPH04121714U (en) * 1991-04-18 1992-10-30 株式会社日立水沢エレクトロニクス flyback transformer
JPH08130140A (en) * 1995-04-10 1996-05-21 Hokuriku Electric Ind Co Ltd Fly-back transformer
KR100235765B1 (en) * 1995-10-24 1999-12-15 무라타 야스타카 Variable Resistor for High Voltage

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