JPH0787126B2 - Variable resistor - Google Patents
Variable resistorInfo
- Publication number
- JPH0787126B2 JPH0787126B2 JP32318489A JP32318489A JPH0787126B2 JP H0787126 B2 JPH0787126 B2 JP H0787126B2 JP 32318489 A JP32318489 A JP 32318489A JP 32318489 A JP32318489 A JP 32318489A JP H0787126 B2 JPH0787126 B2 JP H0787126B2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- sealing cover
- casting resin
- variable resistor
- brush
- 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 - Fee Related
Links
Landscapes
- Details Of Resistors (AREA)
- Adjustable Resistors (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、防塵性および防水性を必要とする場所で使用
される可変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 variable resistor used where dustproofness and waterproofness are required.
従来の技術 近年電子部品としての可変抵抗器は、その使用用途の拡
大から、屋外使用および自動車部品としても使用され
て、防塵性および防水性などの要求が厳しくなってきて
いる。2. Description of the Related Art In recent years, a variable resistor as an electronic component has been used for outdoor use and as an automobile component due to the expansion of its usage, and requirements for dust resistance and waterproofness have become strict.
以下、図面を参照しながら、従来の可変抵抗器について
説明する。A conventional variable resistor will be described below with reference to the drawings.
第３図は従来の可変抵抗器の断面図である。第３図にお
いて、ハウジング１は一方に開口部、他方に軸受２を有
し、この軸受２を貫通して軸３が設けられ、この軸の一
端に、刷子４が装着された刷子取付板５が挿着されてい
る。さらに、抵抗基板である抵抗体６の一方の面上に刷
子４が摺動して抵抗値が可変され、他方の面上に注型樹
脂8aが塗布され、その上に封口カバー７が配置されてい
る。封口カバー７は、第４図に示すような形状をしてお
り、内蔵部品の組込まれたハウジング１に配されて、開
口部から圧入または、ハウジング１の外周部のカシメ、
熱溶着などの方法により接合される。そして封口カバー
７の接合後に、外部からの水やほこりなどの可変抵抗器
内部への侵入を防ぐため、注型樹脂8bを封口カバー７上
でハウジング１の開口部に充填している。FIG. 3 is a sectional view of a conventional variable resistor. In FIG. 3, a housing 1 has an opening on one side and a bearing 2 on the other side, a shaft 3 is provided through the bearing 2, and a brush mounting plate 5 having a brush 4 attached to one end of the shaft 3. Has been inserted. Further, the brush 4 slides on one surface of the resistor 6 which is the resistance substrate to change the resistance value, the casting resin 8a is applied on the other surface, and the sealing cover 7 is arranged on the casting resin 8a. ing. The sealing cover 7 has a shape as shown in FIG. 4, is arranged in the housing 1 in which built-in components are incorporated, and is press-fitted from the opening or caulking the outer peripheral portion of the housing 1.
It is joined by a method such as heat welding. After the sealing cover 7 is joined, a casting resin 8b is filled in the opening of the housing 1 on the sealing cover 7 in order to prevent water or dust from entering the variable resistor from the outside.
以上のように構成された従来の可変抵抗器について、以
下、その作用を説明する。The operation of the conventional variable resistor configured as described above will be described below.
まず、ハウジング１に対して軸３、刷子４が装着された
刷子取付板５、さらに抵抗体６を順に組立てて配置す
る。さらに、封口カバー７をハウジング１の開口部より
挿入して固定する前に、抵抗体６がハウジング１の中で
動かないように、注型樹脂8aを抵抗体６とハウジング１
との間の隙間に塗布して接合する。次に、ハウジング１
の開口部より封口カバー７を挿入する。その後、封口カ
バー７を保護するとともに、防水性および防塵性を向上
させる目的で、注型樹脂8bを封口カバー７上に流し込
む。First, the shaft 3, the brush mounting plate 5 on which the brush 4 is mounted, and the resistor 6 are assembled and arranged in this order with respect to the housing 1. Further, before the sealing cover 7 is inserted and fixed from the opening of the housing 1, the casting resin 8a is applied to the resistor 6 and the housing 1 so that the resistor 6 does not move in the housing 1.
Apply to the gap between and to join. Next, housing 1
The sealing cover 7 is inserted from the opening. After that, the casting resin 8b is poured onto the sealing cover 7 for the purpose of protecting the sealing cover 7 and improving waterproofness and dustproofness.
発明が解決しようとする課題 しかしながら注型樹脂8aを塗布したまま放置しておく
と、塗布された凸形状のまま注型樹脂8aが固化するため
に、上記凸形状が障害となって封口カバー７をハウジン
グに嵌合させたときに浮き上がったり、あるいは嵌合不
可能となってしまうことがあり、注型樹脂8aが柔らかい
うちに封口カバー７の固着工程に移らなければならなか
った。また、注型樹脂8a,8bを２度塗布、あるいは注型
充填するという不便さも有していた。また、注型樹脂8a
を塗布しない場合でもカシメ、圧入、半田付など別の方
法によって抵抗体６を固定する工程が必要となるという
問題を有していた。However, if the casting resin 8a is left as it is, the casting resin 8a is solidified in the applied convex shape, so that the convex shape becomes an obstacle and the sealing cover 7 There is a case where the resin is lifted up when it is fitted into the housing, or it becomes impossible to fit it. Therefore, it was necessary to move to the step of fixing the sealing cover 7 while the casting resin 8a was soft. Further, there is an inconvenience that the casting resins 8a and 8b are applied twice or filled by casting. Also, casting resin 8a
There is a problem in that the step of fixing the resistor 6 by another method such as crimping, press fitting, or soldering is required even when the is not applied.
本発明は上記従来の問題を解決するもので、注型樹脂の
一度の充填でハウジングと封口カバー、さらに、ハウジ
ングと抵抗体を固着することができる可変抵抗器を提供
することを目的とするものである。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a variable resistor capable of fixing a housing and a sealing cover and a housing and a resistor by a single filling of a casting resin. Is.
課題を解決するための手段 上記課題を解決するために本発明の可変抵抗器は、一方
に開口部と他方に軸受を有し、絶縁材料よりなるハウジ
ングと、前記軸受を貫通している軸と、前記軸に挿着さ
れた刷子取付板と、前記刷子取付板に装着された刷子
と、前記刷子が摺動する抵抗基板と、前記抵抗基板上に
配され外周に切欠き部を有する封口カバーと、前記ハウ
ジングの開口部を通して注入され、前記封口カバーとハ
ウジングを固着するとともに、前記抵抗基板とハウジン
グを固着する注型樹脂よりなるものである。Means for Solving the Problems To solve the above problems, the variable resistor of the present invention has an opening on one side and a bearing on the other side, a housing made of an insulating material, and a shaft penetrating the bearing. A brush mounting plate inserted into the shaft, a brush mounted on the brush mounting plate, a resistance substrate on which the brush slides, and a sealing cover disposed on the resistance substrate and having a cutout portion on the outer periphery. And a casting resin that is injected through the opening of the housing to fix the sealing cover to the housing and to fix the resistance substrate to the housing.
作用 上記構成により、封口カバーの外周に、たとえば円弧形
または矩形などの、注型樹脂が流れ込むための切り欠き
部を設けたので、注型樹脂をハウジングの開口部を通し
て封口カバーに注入し、注型樹脂が封口カバーとハウジ
ングの間の隙間に充填されるとともに、切り欠き部を通
して抵抗基板とハウジングの間の隙間に流れ込み、ハウ
ジングと封口カバーおよび抵抗体基板が注型樹脂の一度
の充填で固着される。したがって、従来のように、ハウ
ジングと封口カバーとの固着工程とは別に、ハウジング
内の抵抗基板を固着する工程を設定する必要がなくな
り、また、封口カバーを接合する前後で、仕掛品として
放置して、次工程に進む必要もなくなり、その作業性が
向上する。With the above configuration, since the notch for allowing the casting resin to flow, for example, an arc shape or a rectangle, is provided on the outer periphery of the sealing cover, the casting resin is injected into the sealing cover through the opening of the housing, The casting resin fills the gap between the sealing cover and the housing, and flows into the gap between the resistance substrate and the housing through the notch, so that the housing, sealing cover, and resistor substrate can be filled with the casting resin once. It is fixed. Therefore, it is not necessary to set a step of fixing the resistance substrate in the housing separately from the step of fixing the housing and the sealing cover as in the conventional case, and it is left as a work-in-process before and after the sealing cover is joined. Therefore, it is not necessary to proceed to the next step, and the workability is improved.
実施例 以下、本発明の一実施例について図面を参照しながら説
明する。なお、従来例と同一の作用、効果を奏するもの
には同一の符号を付してその説明を省略する。Embodiment An embodiment of the present invention will be described below with reference to the drawings. The same effects and effects as those of the conventional example are designated by the same reference numerals, and the description thereof will be omitted.
第１図は本発明の一実施例を示す可変抵抗器の断面図で
ある。第１図において、封口カバー11は、ハウジング１
の開口部より挿入されて、抵抗体６上に配され、外周に
円弧形または矩形などの切り欠き部11aが形成されてい
る。熱可塑性の樹脂よりなるハウジング１には、封口カ
バー11と嵌合する熱溶着またはカシメなどによる段差1a
が設けられ、封口カバー11は、ハウジング１と嵌合した
状態で固定されている。注型樹脂12はハウジング１の開
口部を通して封口カバー11上から充填して硬化される。FIG. 1 is a sectional view of a variable resistor showing an embodiment of the present invention. In FIG. 1, the sealing cover 11 is a housing 1
It is inserted from the opening of the above, is arranged on the resistor 6, and the cutout portion 11a having an arc shape or a rectangle is formed on the outer periphery. The housing 1 made of a thermoplastic resin has a step 1a formed by heat welding or caulking which is fitted with the sealing cover 11.
Is provided, and the sealing cover 11 is fixed in a state of being fitted to the housing 1. The casting resin 12 is filled from above the sealing cover 11 through the opening of the housing 1 and is cured.
以上のように構成された電子部品としての可変抵抗器に
ついて、以下、その作用を説明する。The operation of the variable resistor as an electronic component configured as described above will be described below.
まず、注型樹脂12をハウジング１の開口部を通して封口
カバー11上に注入して、注型樹脂12を充填すると、第２
図に示すように、封口カバー11の円弧形または矩形の切
欠き部11aを通してハウジング１と封口カバー11および
抵抗体６の間のそれぞれの隙間にも注型樹脂12が充填さ
れる。上記の状態で注型樹脂12が硬化することにより、
ハウジング１内部の抵抗体６を、注型樹脂12の充填工
程、１工程で固定、固着することが可能となり、また、
注型樹脂12が隙間に流れ込んだ形で固化するため平面的
に封口カバー11の上面で固化した従来の構造よりも強い
固着強度が得られる。First, the casting resin 12 is injected into the sealing cover 11 through the opening of the housing 1 and the casting resin 12 is filled.
As shown in the figure, the casting resin 12 is also filled in the respective gaps between the housing 1 and the sealing cover 11 and the resistor 6 through the arcuate or rectangular notch 11a of the sealing cover 11. By curing the casting resin 12 in the above state,
The resistor 6 inside the housing 1 can be fixed and fixed in one step of filling the casting resin 12, and
Since the casting resin 12 solidifies as it flows into the gap, a stronger fixing strength can be obtained than in the conventional structure in which the casting resin 12 is solidified on the upper surface of the sealing cover 11 in a plane.
発明の効果 以上のように本発明によれば、封口カバーの外周の円弧
形または矩形などの切欠き部を設けたことにより、１度
の注型樹脂充填・塗布作業で注型樹脂をハウジングと封
口カバーおよび抵抗基板の隙間に充填して固定すること
ができ、従来２度充填していた工程を１度の充填で行な
えることで工程の簡素化を行うことができるとともにそ
の作業性を向上させることができる。EFFECTS OF THE INVENTION As described above, according to the present invention, by providing a cutout portion such as an arc shape or a rectangle on the outer periphery of the sealing cover, the casting resin can be filled in the housing by one-time casting and filling operation. The gap between the sealing cover and the resistance substrate can be filled and fixed, and the process that was conventionally performed twice can be performed once so that the process can be simplified and the workability can be improved. Can be improved.
第１図は本発明の一実施例を示す可変抵抗器の断面図、
第２図は第１図における封口カバーの斜視図、第３図は
従来の可変抵抗器の断面図、第４図は第３図における封
口カバーの斜視図である。 １……ハウジング、２……軸受、３……軸、４……刷
子、５……刷子取付板、６……抵抗体、11……封口カバ
ー、11a……切り欠き部、12……注型樹脂。FIG. 1 is a sectional view of a variable resistor showing an embodiment of the present invention,
2 is a perspective view of the sealing cover in FIG. 1, FIG. 3 is a sectional view of a conventional variable resistor, and FIG. 4 is a perspective view of the sealing cover in FIG. 1 ... Housing, 2 ... Bearing, 3 ... Shaft, 4 ... Brush, 5 ... Brush mounting plate, 6 ... Resistor, 11 ... Sealing cover, 11a ... Notch, 12 ... Note Mold resin.
Claims (1)
料よりなるハウジングと、前記軸受を貫通している軸
と、前記軸に挿着された刷子取付板と、前記刷子取付板
に装着された刷子と、前記刷子が摺動する抵抗基板と、
前基抵抗基板上に配され外周に切欠き部を有する封口カ
バーと、前記ハウジングの開口部を通して注入され、前
記封口カバーとハウジングを固着するとともに、前記抵
抗基板とハウジングを固着する注型樹脂よりなる可変抵
抗器。1. A housing made of an insulating material, having an opening on one side and a bearing on the other side, a shaft penetrating the bearing, a brush mounting plate inserted into the shaft, and the brush mounting plate. A brush attached to the, and a resistance substrate on which the brush slides,
A sealing cover disposed on the front base resistance substrate and having a notch on the outer periphery, and a casting resin injected through the opening of the housing to fix the sealing cover and the housing and to fix the resistance substrate and the housing. Variable resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32318489A JPH0787126B2 (en) | 1989-12-13 | 1989-12-13 | Variable resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32318489A JPH0787126B2 (en) | 1989-12-13 | 1989-12-13 | Variable resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03184304A JPH03184304A (en) | 1991-08-12 |
| JPH0787126B2 true JPH0787126B2 (en) | 1995-09-20 |
Family
ID=18152004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32318489A Expired - Fee Related JPH0787126B2 (en) | 1989-12-13 | 1989-12-13 | Variable resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787126B2 (en) |
-
1989
- 1989-12-13 JP JP32318489A patent/JPH0787126B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03184304A (en) | 1991-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |