JPH04171901A - Variable resistor for high voltage - Google Patents
Variable resistor for high voltageInfo
- Publication number
- JPH04171901A JPH04171901A JP30185890A JP30185890A JPH04171901A JP H04171901 A JPH04171901 A JP H04171901A JP 30185890 A JP30185890 A JP 30185890A JP 30185890 A JP30185890 A JP 30185890A JP H04171901 A JPH04171901 A JP H04171901A
- Authority
- JP
- Japan
- Prior art keywords
- insulating
- case
- variable resistor
- insulating layer
- insulating case
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 239000011347 resin Substances 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 230000007547 defect Effects 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Details Of Resistors (AREA)
- Adjustable Resistors (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明はＴＶ受像機やＣＲＴデイスプレィなどで用いら
れる高圧用可変抵抗器（以下、可変抵抗器という）に係
り、詳しくは、その絶縁ケースの放電防止構造に関する
。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a high voltage variable resistor (hereinafter referred to as variable resistor) used in TV receivers, CRT displays, etc. Regarding discharge prevention structure.
〈従来の技術〉
従来から、ＴＶ受像機を構成する際に使用されるフライ
バックトランスには可変抵抗器が取り付けられており、
このフォーカスパックといわれる可変抵抗器は第４図の
縦断側面図で示すように構成されているのが一般的であ
る。すなわち、この可変抵抗器は、矩形平板状とされた
アルミナなどからなる絶縁基板１０と、これを収納する
一面開放箱形の樹脂成形品である絶縁ケース１１と、こ
の絶縁ケース１１の底！！１１ａを貫通して回転自在に
保持された高圧側回転輪１２及び低圧側回転軸１３とを
備えている。<Prior art> Conventionally, a variable resistor has been attached to a flyback transformer used when constructing a TV receiver.
This variable resistor called a focus pack is generally constructed as shown in the longitudinal cross-sectional side view of FIG. That is, this variable resistor consists of an insulating substrate 10 made of alumina or the like in the shape of a rectangular plate, an insulating case 11 which is a resin molded product with an open box on one side, and a bottom of this insulating case 11. ! It includes a high-pressure side rotating ring 12 and a low-pressure side rotating shaft 13 that are rotatably held through the shaft 11a.
そして、この絶縁基板１０の表面上には、抵抗パターン
１４とともに、その端部それぞれと導通接続された端子
電極（図示していない）が形成される一方、回転軸１２
．１３それぞれの内端には抵抗パターン１４上を摺動す
ることによって適宜に分圧された電圧を取゛り出す摺動
子１６．１７が取り付けられている。Terminal electrodes (not shown) are formed on the surface of this insulating substrate 10 together with the resistor pattern 14 and are electrically connected to each end of the resistor pattern 14.
．． Sliders 16 and 17 are attached to the inner ends of each of the resistor patterns 13, and slide on the resistor pattern 14 to take out an appropriately divided voltage.
なお、図における符号１８は絶縁性樹脂層を示しており
、この絶縁性樹脂層１８は絶縁ケース１１の内部を密閉
封止すべく絶縁基板１０の裏面側に絶縁性樹脂を充填す
ることによって形成されている。また、符号１９は可変
抵抗器が取り付けられるフライバックトランスの外装ケ
ースであり、この外装ケース１９内にも絶縁性樹脂（図
示していない）が充填されている。Note that the reference numeral 18 in the figure indicates an insulating resin layer, and this insulating resin layer 18 is formed by filling the back side of the insulating substrate 10 with an insulating resin in order to hermetically seal the inside of the insulating case 11. has been done. Further, reference numeral 19 is an outer case of a flyback transformer to which a variable resistor is attached, and this outer case 19 is also filled with an insulating resin (not shown).
〈発明が解決しようとする課題〉
ところで、前記従来構成の可変抵抗器には、つぎのよう
な不都合があった。すなわち、この種の可変抵抗器では
、絶縁ケース１１によって外部絶縁を確保するのである
が、この絶縁ケース１１中にボイド（気泡）が存在して
いたり、その表面にクランク（ひび割れ）が生じたりし
ていると、特に可変抵抗器の高圧側部分において外部放
電が発生する危険性がある。そして、外部放電が起こる
と、発煙や発火が生じて致命的な損傷を招くことにもな
る。<Problems to be Solved by the Invention> By the way, the variable resistor of the conventional configuration has the following disadvantages. In other words, in this type of variable resistor, external insulation is ensured by the insulating case 11, but voids (bubbles) may exist in the insulating case 11, or cracks may occur on its surface. If so, there is a risk of external discharge occurring, especially in the high voltage side portion of the variable resistor. When external discharge occurs, smoke and ignition may occur, resulting in fatal damage.
本発明はかかる従来の不都合に鑑みて創案されたもので
あって、外部放電を有効に防止することができる可変抵
抗器を提供することを目的としている。The present invention was devised in view of such conventional disadvantages, and an object of the present invention is to provide a variable resistor that can effectively prevent external discharge.
〈課題を解決するための手段〉
本発明に係る高圧用可変抵抗器は、このような目的を達
成するために、表面上に抵抗パターンが形成された絶縁
基板と、この絶縁基板を収納する一面開放箱形の絶縁ケ
ースとを備えた高圧用可変抵抗器であって、絶縁ケース
の絶縁基板を離間して覆う底壁の抵抗パターンの少なく
とも高圧側の内面上には絶縁性樹脂からなる所定厚みの
絶縁層を形成する一方、絶縁ケースの抵抗パターンの少
なくとも高圧側を囲む側壁内には絶縁性樹脂が充填され
る所定深さで所定幅の溝部を形成したことを特徴とする
ものである。<Means for Solving the Problems> In order to achieve the above object, the high-voltage variable resistor according to the present invention has an insulating substrate on which a resistance pattern is formed, and one surface for housing the insulating substrate. A high-voltage variable resistor comprising an open box-shaped insulating case, the resistor pattern on the bottom wall covering the insulating substrate of the insulating case at a distance, at least on the inner surface on the high-voltage side, has a predetermined thickness made of insulating resin. The invention is characterized in that a groove portion of a predetermined depth and a predetermined width is formed to be filled with an insulating resin in the side wall surrounding at least the high voltage side of the resistance pattern of the insulating case.
〈作用〉
上記手段によれば、可変抵抗器を構成する絶縁基板上の
抵抗パターンの少なくとも高圧側は、絶縁ケースの底壁
及び側壁によって取り囲まれると同時に、底壁の内面上
に形成された絶縁層及び側壁内の溝部に充填される絶縁
性樹脂からなる絶縁層によっても取り囲まれていること
になる。そして、絶縁ケースの成形と絶縁性樹脂の充填
による絶縁層の形成とは別の工程で行われるため、絶縁
ケースと絶縁層との同じ位置にボイドやクランクなどの
欠陥が揃って住しることはあり得ない。<Operation> According to the above means, at least the high voltage side of the resistance pattern on the insulating substrate constituting the variable resistor is surrounded by the bottom wall and side wall of the insulating case, and at the same time, the insulating pattern formed on the inner surface of the bottom wall It is also surrounded by an insulating layer made of an insulating resin that fills the grooves in the layer and side walls. Furthermore, since the molding of the insulating case and the formation of the insulating layer by filling with insulating resin are performed in separate processes, defects such as voids and cranks may occur in the same position on the insulating case and the insulating layer. That's impossible.
〈実施例〉 以下、本発明の実施例を図面に基づいて説明する。<Example> Embodiments of the present invention will be described below based on the drawings.
第１１！！Ｉ！は本実施例に係る可変抵抗器の概略構成
を示す縦断側面図、第２ＷＩは第り図の１１線に沿う横
断側面図であり、第３図は絶縁ケースをその開放側から
見た一部破断斜視図である。なお、この可変抵抗器の全
体構造については従来例と基本的に興ならないので、第
１ｖ１ないし第３図において第４図と互いに同一もしく
は相当する部品、部分には同一符号を付し、ここでの詳
しい説明は省略する。11th! ! I! 2 is a vertical side view showing a schematic configuration of the variable resistor according to the present example, 2nd WI is a cross-sectional side view taken along line 11 in Figure 3, and Figure 3 is a part of the insulating case seen from its open side. FIG. The overall structure of this variable resistor is fundamentally different from that of the conventional example, so parts and portions in FIGS. 1v1 to 3 that are the same or equivalent to those in FIG. A detailed explanation will be omitted.
本実施例に係る可変抵抗器は、−面開放箱形とされた樹
脂成形品である絶縁ケース１と、これに収納される略矩
形状の絶縁基板１０と、絶縁ケース１の底壁１ａを貫通
して回転自在に保持された高圧側回転軸１２及び低圧側
回転軸１３とを備えている。そして、この絶縁基板１０
の表面上には抵抗パターン１４と、その端部それぞれに
導通接続された端子電極（図示していない）とが形成さ
れる一方、回転軸１２．１３の内端には抵抗パターン１
４上を摺動する摺動子１６．１７がそれぞれ取り付けら
れている。なお、図示していないが、絶縁基板１０の表
面上には、上記端子電極の他、摺動子１６．１７によっ
て分圧された電圧を取り出すための端子電極も形成され
ている。The variable resistor according to this embodiment includes an insulating case 1 which is a resin molded product with a negative side open box shape, a substantially rectangular insulating substrate 10 housed in the insulating case 1, and a bottom wall 1a of the insulating case 1. It includes a high-pressure side rotating shaft 12 and a low-pressure side rotating shaft 13 that are rotatably held through the shaft. And this insulating substrate 10
A resistive pattern 14 and terminal electrodes (not shown) electrically connected to each end thereof are formed on the surface of the rotary shaft 12.13, while a resistive pattern 14 is formed on the inner end of the rotating shaft 12.
Sliders 16 and 17 are respectively attached to slide on the four. Although not shown, in addition to the terminal electrodes described above, terminal electrodes for extracting the voltage divided by the sliders 16 and 17 are also formed on the surface of the insulating substrate 10.
また、この絶縁ケース１の絶縁基板１０を離間して覆う
底壁１ａの内面上全域には絶縁性樹脂を充填してなる所
定厚みの絶縁層２が形成される一方、この抵抗パターン
１４を囲む絶縁ケースｌの側ｇｌｌｂ内には回転軸１３
例の一辺の側壁を除いて絶縁性樹脂が充填される所定深
さで所定幅の溝部３が形成されている。すなわち、この
溝部３はこれが形成される側壁１ｂの高さと略一致する
深さとして形成されており、この溝部３内には、例 −
えば、この可変抵抗器がフライバックトランスの外装ケ
ース１９に取り付けられたのち、この外装ケース１９に
充填されるのと同一の絶縁性樹脂が同時に充填されて絶
縁層が形成される。なお、絶縁層２の厚みは、これ単独
で耐圧を確保しうる程度に設定されていることが望まし
い、また、上記溝部３の幅は、これに充填された絶縁性
樹脂が単独であったとしても耐圧を確保し得る厚みとな
るように予め設定されていることが望ましい、そして、
溝部３内への絶縁性樹脂の充填は、フライバンクトラン
スに取り付ける前に予め行っておいてもよいことはいう
までもない、また、絶縁性樹脂としてはエポキシ樹脂を
用いるのが一般的であるが、これに限定されるものでは
なく、絶縁ケース１と同一もしくは異なる樹脂材料のい
ずれであってもよい。Further, an insulating layer 2 of a predetermined thickness filled with an insulating resin is formed on the entire inner surface of the bottom wall 1a that covers the insulating substrate 10 of the insulating case 1 at a distance, while surrounding the resistor pattern 14. There is a rotating shaft 13 inside the side gllb of the insulating case l.
A groove portion 3 having a predetermined depth and a predetermined width is formed to be filled with an insulating resin except for the side wall on one side of the example. That is, this groove part 3 is formed to have a depth that substantially matches the height of the side wall 1b on which it is formed, and within this groove part 3, for example -
For example, after this variable resistor is attached to the outer case 19 of the flyback transformer, the same insulating resin that is filled into the outer case 19 is simultaneously filled to form an insulating layer. The thickness of the insulating layer 2 is desirably set to such an extent that it alone can ensure withstand voltage, and the width of the groove 3 is set to a value that is equal to the width of the groove 3, assuming that only the insulating resin is filled therein. It is desirable that the thickness is set in advance to ensure pressure resistance, and
It goes without saying that the groove 3 may be filled with insulating resin in advance before being attached to the flybank transformer, and epoxy resin is generally used as the insulating resin. However, the material is not limited to this, and may be made of the same or different resin material as the insulating case 1.
ところで、以上の説明においては、絶縁層２を絶縁ケー
ス１の底壁１ａの内面上全域に形成し、かつ、側壁ｌｂ
内の絶縁性樹脂が充填される溝部３は回転軸１３例の一
辺の側壁のみを除いて形成するとしているが、これに限
定されるものではない、すなわち、絶縁層２は抵抗パタ
ーン１４の高圧側（回転軸１２側）だけに形成してもよ
いし、溝部３も同様に高圧側だけに形成しておいてもよ
い、また、溝部３は、側壁１ｂの全周にわたって形成さ
れていてもよい。By the way, in the above description, the insulating layer 2 is formed all over the inner surface of the bottom wall 1a of the insulating case 1, and the side wall lb
Although the groove 3 filled with the insulating resin is formed by excluding only the side wall of one side of the rotating shaft 13, the invention is not limited to this. The groove 3 may be formed only on the side (rotating shaft 12 side), or the groove 3 may be formed only on the high pressure side, or the groove 3 may be formed over the entire circumference of the side wall 1b. good.
さらにまた、絶縁ケース１に収納される絶縁基板１０の
表面上には、抵抗パターン１４のみならず、端子電極（
図示していない）も形成されているから、第２図で示す
ように、高圧側の端子電極が露出する空間Ｓ内にも絶縁
性樹脂を充填しておくこともできる。また、回転軸の個
数についても、上述した２軸には限定されず、１軸であ
っても３輪以上の多軸であってもよい、さらには、本発
明に係る高圧用可変抵抗器をフライバックトランス以外
の高圧発生装置に取り付けて用いることも可能である。Furthermore, on the surface of the insulating substrate 10 housed in the insulating case 1, not only the resistance pattern 14 but also the terminal electrode (
(not shown), the space S where the high-voltage side terminal electrode is exposed can also be filled with insulating resin, as shown in FIG. Further, the number of rotating shafts is not limited to the two mentioned above, and may be one shaft or multiple shafts with three or more wheels.Furthermore, the high voltage variable resistor according to the present invention It is also possible to use it by attaching it to a high pressure generator other than a flyback transformer.
〈発明の効果〉
以上説明したように、本発明に係る可変抵抗器において
は、絶縁基板上に形成された抵抗パターンの少なくとも
高圧側が絶縁ケースによって取り囲まれると同時に、こ
の絶縁ケースの底壁の内面上に形成された絶縁層及び側
壁の溝部内に形成された絶縁層とによっても二重に取り
囲まれている。<Effects of the Invention> As explained above, in the variable resistor according to the present invention, at least the high voltage side of the resistance pattern formed on the insulating substrate is surrounded by the insulating case, and at the same time, the inner surface of the bottom wall of the insulating case It is also doubly surrounded by an insulating layer formed above and an insulating layer formed in the groove of the sidewall.
そして、絶縁ケースの成形と絶縁性樹脂の充填による絶
縁層の形成とは別の工程で行われるため、絶縁ケースと
絶縁層との同じ位置にボイドやクランクなどの欠陥が揃
って生じることはあり得す、万一、絶縁ケースに欠陥が
生じていたとしても、この欠陥は絶縁層によって十分に
補われることになる。また、絶縁層に欠陥が生じていた
としても絶縁ケースに欠陥がなければ、何ら不都合は生
じない。Furthermore, since the molding of the insulating case and the formation of the insulating layer by filling with insulating resin are performed in separate processes, defects such as voids and cranks may not occur in the same position on the insulating case and the insulating layer. Even if a defect were to occur in the insulating case, this defect would be sufficiently compensated for by the insulating layer. Further, even if a defect occurs in the insulating layer, no problem will occur if there is no defect in the insulating case.
したがって、本発明によれば、絶縁ケースと絶縁層との
二重構成によって外部放電を有効に防止することができ
るという効果が得られる。Therefore, according to the present invention, it is possible to effectively prevent external discharge due to the double structure of the insulating case and the insulating layer.
第１図ないし第３図は本発明の実施例に係り、第１図は
可変抵抗器の概略構成を示す縦断側面図、第２図は第１
図のｎ−ｎ線に沿う横断側面図であり、第３図は絶縁ケ
ースをその開放側から見た一部破断斜視図である。また
、第４図は従来例に係り、可変抵抗器の概略構成を示す
縦断面図である。
図における符号１は絶縁ケース、ｌａは底壁、１ｂは側
壁、２は絶縁層、３は溝部、１０は絶縁基板、１４は抵
抗パターンである。
なお、図中の同一符号は、互いに同一もしくは相当する
部品、部分を示している。1 to 3 relate to embodiments of the present invention, in which FIG. 1 is a vertical cross-sectional side view showing a schematic configuration of a variable resistor, and FIG.
FIG. 3 is a cross-sectional side view taken along line nn in the figure, and FIG. 3 is a partially cutaway perspective view of the insulating case seen from its open side. Further, FIG. 4 is a vertical cross-sectional view showing a schematic configuration of a variable resistor according to a conventional example. In the figure, reference numeral 1 is an insulating case, la is a bottom wall, 1b is a side wall, 2 is an insulating layer, 3 is a groove, 10 is an insulating substrate, and 14 is a resistor pattern. Note that the same reference numerals in the drawings indicate parts and portions that are the same or correspond to each other.
Claims (1)
基板（１０）と、この絶縁基板（１０）を収納する一面
開放箱形の絶縁ケース（１）とを備えた高圧用可変抵抗
器であって、 絶縁ケース（１）の絶縁基板（１０）を離間して覆う底
壁（１ａ）の抵抗パターン（１４）の少なくとも高圧側
の内面上には絶縁性樹脂からなる所定厚みの絶縁層（２
）を形成する一方、 絶縁ケース（１）の抵抗パターン（１４）の少なくとも
高圧側を囲む側壁（１ｂ）内には絶縁性樹脂が充填され
る所定深さで所定幅の溝部（３）を形成したことを特徴
とする高圧用可変抵抗器。(1) A high-voltage variable resistor comprising an insulating substrate (10) on which a resistance pattern (14) is formed, and an insulating case (1) in the form of an open box on one side that houses the insulating substrate (10). An insulating layer of a predetermined thickness made of an insulating resin is provided on at least the inner surface on the high voltage side of the resistance pattern (14) of the bottom wall (1a) that covers the insulating substrate (10) of the insulating case (1) at a distance. (2
), and a groove (3) having a predetermined width and a predetermined depth is formed to be filled with an insulating resin in the side wall (1b) surrounding at least the high voltage side of the resistance pattern (14) of the insulating case (1). A high voltage variable resistor characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2301858A JP2550774B2 (en) | 1990-11-06 | 1990-11-06 | Variable resistor for high voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2301858A JP2550774B2 (en) | 1990-11-06 | 1990-11-06 | Variable resistor for high voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04171901A true JPH04171901A (en) | 1992-06-19 |
| JP2550774B2 JP2550774B2 (en) | 1996-11-06 |
Family
ID=17902009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2301858A Expired - Fee Related JP2550774B2 (en) | 1990-11-06 | 1990-11-06 | Variable resistor for high voltage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2550774B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56104107U (en) * | 1980-01-08 | 1981-08-14 | ||
| JPH0265304U (en) * | 1988-11-04 | 1990-05-16 | ||
| JPH0268407U (en) * | 1988-11-14 | 1990-05-24 | ||
| JPH0335504A (en) * | 1989-07-03 | 1991-02-15 | Hokuriku Electric Ind Co Ltd | High voltage resistor pack and manufacture thereof |
-
1990
- 1990-11-06 JP JP2301858A patent/JP2550774B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56104107U (en) * | 1980-01-08 | 1981-08-14 | ||
| JPH0265304U (en) * | 1988-11-04 | 1990-05-16 | ||
| JPH0268407U (en) * | 1988-11-14 | 1990-05-24 | ||
| JPH0335504A (en) * | 1989-07-03 | 1991-02-15 | Hokuriku Electric Ind Co Ltd | High voltage resistor pack and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2550774B2 (en) | 1996-11-06 |
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