JPH11260606A - Sliding resistor - Google Patents
Sliding resistorInfo
- Publication number
- JPH11260606A JPH11260606A JP8286598A JP8286598A JPH11260606A JP H11260606 A JPH11260606 A JP H11260606A JP 8286598 A JP8286598 A JP 8286598A JP 8286598 A JP8286598 A JP 8286598A JP H11260606 A JPH11260606 A JP H11260606A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- contact
- sliding
- oil
- fluorine
- 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
Landscapes
- Lubricants (AREA)
- Adjustable Resistors (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は，自動車のポテンショメータに利
用される摺動式の電気接点等の摺動抵抗器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding resistor such as a sliding electric contact used for a potentiometer of an automobile.
【０００２】[0002]
【従来技術】従来，自動車のポテンショメータに利用さ
れる摺動式の電気接点等の摺動抵抗器として，後述する
図１〜図３に示すごとく，抵抗体基板の表面に印刷等で
導電性樹脂からなり，固定接点となる抵抗体を形成し，
更に，該抵抗体を含む抵抗基板の表面を電気的導通性を
保ちつつ摺動し，可動接点となるコンタクトよりなるも
のが知られている。コンタクトが抵抗体の上を動くこと
により，両者に接続された回路の電気抵抗値の変動から
コンタクトに接続された物体の位置検出を行うことがで
きる。2. Description of the Related Art Conventionally, as a sliding resistor such as a sliding electric contact used for a potentiometer of an automobile, as shown in FIGS. To form a resistor that becomes a fixed contact,
Further, there has been known a structure in which the surface of a resistance substrate including the resistor is slid while maintaining electrical conductivity, and the contact becomes a movable contact. When the contact moves on the resistor, the position of the object connected to the contact can be detected from the fluctuation of the electric resistance value of the circuit connected to both.
【０００３】上記抵抗体の多くはカーボンとバインダー
樹脂とよりなる導電性樹脂からなり，抵抗体基板の多く
は樹脂成形品またはセラミック等よりなり，またコンタ
クトは高硬度の貴金属合金から構成されている。[0003] Most of the resistors are made of a conductive resin composed of carbon and a binder resin, most of the resistor substrates are made of a resin molded product or ceramic, and the contacts are made of a high-hardness noble metal alloy. .
【０００４】[0004]
【解決しようとする課題】しかしながら，従来の摺動抵
抗器には以下に示すごとき問題点があった。コンタクト
は抵抗体よりも硬度が高いため，コンタクトの摺動によ
り抵抗体が摩耗し，抵抗体摩耗粉が発生する。この抵抗
体摩耗粉が抵抗体上のコンタクトの摺動軌跡両端に付
着，堆積するおそれがある。このため，長期の使用にお
いては，コンタクトが抵抗体摩耗粉に乗り上げて摺動す
ることになり，抵抗体とコンタクトとの電気的接触が不
安定となり，接触抵抗（値）が大きくなるという問題が
ある。However, the conventional sliding resistor has the following problems. Since the contact has a higher hardness than the resistor, the resistor is worn by sliding of the contact, and resistor wear powder is generated. The abrasion powder of the resistor may adhere and accumulate on both ends of the sliding trajectory of the contact on the resistor. As a result, in long-term use, the contact rides on the resistor wear powder and slides, and the electrical contact between the resistor and the contact becomes unstable and the contact resistance (value) increases. is there.
【０００５】なお，抵抗体とコンタクトとの電気的接触
の状態を計測する方法として，後述する図１１に示すご
とき接触抵抗法がある。この方法は，抵抗体２とコンタ
クト３との間，即ち端子Ａと端子Ｃとの間に一定電流Ｉ
ｃを流し，端子Ｃと端子Ｂとの間に出力される電圧値Ｖ
ｃとを計測する。これらより，Ｖｃ／Ｉｃ＝Ｒｃとなっ
て，抵抗体２とコンタクト３との間の接触抵抗（値）
（摺動ノイズともいう）を求めることができる。接触抵
抗（値）が大きい時，摺動ノイズが高いと言い，接触抵
抗（値）が小さい時，摺動ノイズが低いと言う。As a method of measuring the state of electrical contact between the resistor and the contact, there is a contact resistance method as shown in FIG. 11 described later. This method uses a constant current I between the resistor 2 and the contact 3, that is, between the terminal A and the terminal C.
c and the voltage value V output between the terminal C and the terminal B
and c. From these, Vc / Ic = Rc, and the contact resistance (value) between the resistor 2 and the contact 3
(Also referred to as sliding noise). When the contact resistance (value) is high, the sliding noise is high, and when the contact resistance (value) is low, the sliding noise is low.
【０００６】上記抵抗体摩耗粉が，抵抗体上のコンタク
トの摺動軌跡両端に付着，堆積する要因は，下記のメカ
ニズムによるものと推定される。抵抗体摩耗粉は上述の
導電性樹脂，即ちバインダー樹脂の周囲にカーボンが有
機的でなく機械的に付着したものの集合体である。この
ため，カーボンはバインダー樹脂から容易に分離してし
まう。It is estimated that the following mechanism causes the resistor wear powder to adhere and accumulate on both ends of the contact trajectory of the contact on the resistor. The resistor wear powder is an aggregate of the conductive resin, that is, the binder resin, in which carbon is mechanically attached, not organically, around the binder resin. For this reason, the carbon is easily separated from the binder resin.
【０００７】そして，図１２に示すごとく，カーボンが
分離した抵抗体摩耗粉９には−Ｏ，−ＯＨ等の極性基が
あり，抵抗体２上の−Ｏ，−ＯＨ等の極性基と結合９１
を形成し，抵抗体摩耗粉９は抵抗体２に付着してしま
う。付着した抵抗体摩耗粉９の上をコンタクト３が摺動
することで，摺動ノイズが発生する。As shown in FIG. 12, the resistor wear powder 9 from which carbon has been separated has polar groups such as -O and -OH, and is bonded to polar groups such as -O and -OH on the resistor 2. 91
Is formed, and the resistor wear powder 9 adheres to the resistor 2. When the contact 3 slides on the attached resistor wear powder 9, sliding noise is generated.
【０００８】従来，上記抵抗体摩耗粉の抵抗体への付
着，堆積量を低減する方法として，特開平１−２０７９
０２号で開示された方法が提案されている。これは，粒
径１〜１０μｍのフッ化炭素を２ｗｔ％程度含有させた
オレフィン系接点グリースを抵抗体上に塗布すること
で，該グリースに潤滑剤の働きをさせるという方法であ
る。このグリースがコンタクトと抵抗体との間の摩擦力
を低下させ，抵抗体摩耗粉の発生を抑制することができ
る。さらに，この従来技術では，発生した抵抗体摩耗粉
はグリースに包みこまれ流動的な状態となるため，コン
タクトの抵抗体摩耗粉への乗り上げが発生し難くなり，
安定な接触状態を長期にわたって維持することができ
る。Conventionally, as a method of reducing the amount of the above-mentioned resistor wear powder adhering and depositing on the resistor, Japanese Patent Laid-Open No. 1-2079 has been proposed.
No. 02 has proposed the method disclosed therein. This is a method in which an olefin-based contact grease containing about 2% by weight of fluorocarbon having a particle size of 1 to 10 μm is applied on a resistor, so that the grease acts as a lubricant. This grease reduces the frictional force between the contact and the resistor, and can suppress the generation of resistor wear powder. Furthermore, in this conventional technique, the generated resistor wear powder is wrapped in grease and becomes a fluid state, so that it is difficult for the contact to climb over the resistor wear powder,
A stable contact state can be maintained for a long time.
【０００９】しかしながら，上記オレフィン系接点グリ
ースは，本来的に高分子であり，炭化水素系基油をベー
スとしてフッ化炭素粒を混在させた構成である。このた
め，耐熱性や流動性が悪い（粘度が高い）という欠点を
有していた。However, the olefin-based contact grease is inherently a polymer, and has a structure in which carbon fluoride particles are mixed based on a hydrocarbon base oil. For this reason, there was a defect that heat resistance and fluidity were poor (high viscosity).
【００１０】本発明は，かかる問題点に鑑み，摺動ノイ
ズが生じ難く，耐熱性に優れた摺動抵抗体を提供しよう
とするものである。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a sliding resistor which hardly generates sliding noise and has excellent heat resistance.
【００１１】[0011]
【課題の解決手段】請求項１の発明は，抵抗体基板の表
面に配設された抵抗体と，該抵抗体上を摺動するコンタ
クトよりなり，上記抵抗体基板の抵抗体を配設した表面
の全面ないし，該表面であって少なくとも上記コンタク
トが摺動する部分には平均分子量が３０００〜５０００
であるフッ素系オイルよりなるオイル被膜が設けてあ
り，更に，上記オイル被膜の厚みは２〜１００ｎｍであ
ることを特徴とする摺動抵抗器にある。According to a first aspect of the present invention, there is provided a resistor provided on a surface of a resistor substrate, and a contact sliding on the resistor, wherein the resistor of the resistor substrate is provided. The entire surface of the surface or at least a portion of the surface where the contact slides has an average molecular weight of 3,000 to 5,000.
An oil film made of a fluorine-based oil is provided, and the oil film has a thickness of 2 to 100 nm.
【００１２】上記オイル被膜の平均分子量が３０００未
満である場合には，図７に示すごとく，温度１３０℃に
おいてフッ素系オイルの蒸発が始まることから，このよ
うな温度においてオイル被膜が薄くなったり，あるいは
消滅するおそれがある。このため，抵抗体摩耗粉が抵抗
体に付着し，その上をコンタクトが摺動することで摺動
ノイズが発生するという問題が生じるおそれがある。一
方，５０００より大である場合には，図７に示すごと
く，温度−４０℃において，流動性が失われるおそれが
ある。このため，オイル被膜が抵抗体とコンタクトの間
に介在し，摺動ノイズが発生するおそれがある。When the average molecular weight of the oil film is less than 3000, as shown in FIG. 7, evaporation of the fluorinated oil starts at a temperature of 130 ° C., so that the oil film becomes thin at such a temperature, Or there is a risk of disappearing. For this reason, there is a possibility that a problem arises in that the resistor abrasion powder adheres to the resistor, and the contact slides on the resistor to generate sliding noise. On the other hand, if it is larger than 5000, the fluidity may be lost at a temperature of −40 ° C. as shown in FIG. For this reason, the oil coating may be interposed between the resistor and the contact, causing a sliding noise.
【００１３】なお，図７は縦左軸にフッ素系オイルを温
度１３０℃に加熱した場合の蒸発量を，縦右軸にオイル
の流動限界温度（＝流動点）を，横軸にフッ素系オイル
の平均分子量を記載した線図である。In FIG. 7, the vertical left axis indicates the amount of evaporation when the fluorinated oil is heated to a temperature of 130 ° C., the vertical right axis indicates the oil flow limit temperature (= pour point), and the horizontal axis indicates the fluorinated oil. FIG. 2 is a diagram showing an average molecular weight of the sample.
【００１４】また，上記オイル被膜の厚みが２ｎｍ未満
である場合には，後述の図６に示すごとく，作動ノイズ
寿命の余裕度がなくなり，作動回数が寿命回数以上にな
ると摺動ノイズが発生するという問題が生じるおそれが
ある。一方，１００ｎｍより厚い場合には，後述の図６
に示すごとく，振動寿命が短くなり，フッ素オイルと摩
耗粉が混ざった被膜が抵抗体とコンタクトとの間に介在
し，摺動ノイズが発生するおそれがある（後述の実施形
態例参照）。When the thickness of the oil film is less than 2 nm, as shown in FIG. 6 described later, there is no margin for operating noise life, and when the number of operations exceeds the number of operating times, sliding noise occurs. This may cause a problem. On the other hand, when the thickness is larger than 100 nm, FIG.
As shown in (1), the vibration life is shortened, and a film in which fluorine oil and abrasion powder are mixed is interposed between the resistor and the contact, and there is a possibility that sliding noise is generated (see an embodiment example described later).
【００１５】上記フッ素系オイルには，例えば図８に示
すごとき分子構造を持った直鎖型，図９に示すごとき分
子構造を持った側鎖型とがある。直鎖型のフッ素系オイ
ルとしては，パーフロロポリエーテル，パーフルオロポ
リエーテル等を挙げることができ，いずれも本発明にか
かるオイル被膜を構成するフッ素系オイルとして使用す
ることができる。側鎖型のフッ素系オイルとしては，パ
ーフルオロアルキルポリエーテル，パーフルオロポリエ
ーテル等を挙げることができ，いずれも本発明にかかる
オイル被膜を構成するフッ素系オイルとして使用するこ
とができる。The fluorine-based oils include, for example, a linear type having a molecular structure as shown in FIG. 8 and a side chain type having a molecular structure as shown in FIG. Examples of the linear fluorinated oil include perfluoropolyether and perfluoropolyether, and any of them can be used as the fluorinated oil constituting the oil coating according to the present invention. Examples of the side chain type fluorinated oil include perfluoroalkyl polyethers and perfluoropolyethers, and any of them can be used as the fluorinated oil constituting the oil coating according to the present invention.
【００１６】本発明の作用につき，以下に説明する。本
発明にかかる摺動抵抗器は抵抗体基板の抵抗体を配設し
た表面の全面ないし，該表面であって少なくとも上記コ
ンタクトが摺動する部分には平均分子量が上記特定範囲
内にあるフッ素系オイルよりなり，かつ厚みが上記特定
範囲内にあるオイル被膜が設けてある。The operation of the present invention will be described below. The sliding resistor according to the present invention comprises a fluorine-based material having an average molecular weight within the above-mentioned specific range on the entire surface of the surface of the resistor substrate on which the resistor is provided or at least on the surface where the contact slides. An oil coating made of oil and having a thickness within the above specified range is provided.
【００１７】フッ素系オイルによるオイル被膜１００の
表面エネルギーが小さいことより，図５に示すごとく，
抵抗体摩耗粉９の−ＯＨ等の極性基と，抵抗体２上の−
ＯＨ等の極性基との間の結合が阻害され，抵抗体摩耗粉
９が抵抗体２に付着することが防止される。よって，抵
抗体摩耗粉に起因する接触抵抗が小さくなり，結果とし
て摺動ノイズを生じ難くすることができる。即ち，コン
タクトによる抵抗体摩耗粉の発生量の低減，抵抗体摩耗
粉の払拭性の向上を図ることができる。As shown in FIG. 5, since the surface energy of the oil film 100 made of fluorine-based oil is small,
Polar groups such as -OH of the resistor wear powder 9 and-
The bond between the polar group such as OH and the like is hindered, and the resistor wear powder 9 is prevented from adhering to the resistor 2. Therefore, the contact resistance caused by the resistor wear powder is reduced, and as a result, it is possible to reduce the occurrence of sliding noise. That is, it is possible to reduce the amount of resistor wear powder generated by the contact and to improve the wiping performance of the resistor wear powder.
【００１８】また，上述したごときフッ素系オイルは耐
熱性に優れており，また，流動性が高いことから，例え
ば自動車のエンジンルーム内のような過酷な環境下でも
効果を得ることができる。以上により，本発明によれ
ば，摺動ノイズが生じ難く，耐熱性に優れた摺動抵抗体
を提供することができる。Further, since the above-mentioned fluorine-based oil has excellent heat resistance and high fluidity, the effect can be obtained even in a severe environment such as an engine room of an automobile. As described above, according to the present invention, it is possible to provide a sliding resistor that hardly generates sliding noise and has excellent heat resistance.
【００１９】次に，請求項２の発明のように，上記フッ
素系オイルは側鎖型であることが好ましい。側鎖型のフ
ッ素系オイルは，図１０に示すごとく，分子が集合する
ことで容易に網の目構造６を形成することができる。こ
の網の目構造６により分子間結合力を有効に活用するこ
とができ，これにより，オイル被膜を抵抗体上に均一に
形成することができる。Next, it is preferable that the fluorinated oil is of a side chain type. As shown in FIG. 10, the side chain type fluorine-based oil can easily form the network structure 6 by the aggregation of molecules. The network structure 6 makes it possible to effectively utilize the intermolecular bonding force, whereby the oil film can be uniformly formed on the resistor.
【００２０】[0020]
【発明の実施の形態】実施形態例 本発明の実施形態例にかかる摺動抵抗器につき，図１〜
図５を用いて説明する。図１〜図３に示すごとく，本例
の摺動抵抗器１は，抵抗体基板２０の表面に配設された
抵抗体２と，該抵抗体２上を摺動するコンタクト３とよ
りなる。上記抵抗体基板２０の抵抗体２を配設した表面
の全面には平均分子量が３０００〜５０００であるフッ
素系オイルよりなるオイル被膜１００が設けてあり，更
に上記オイル被膜の厚みは２〜１００ｎｍである。ま
た，上記フッ素系オイルは側鎖型であり，平均分子量が
３０００〜５０００のパーフルオロアルキルポリエーテ
ルである。DESCRIPTION OF THE PREFERRED EMBODIMENTS A sliding resistor according to an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. As shown in FIGS. 1 to 3, the sliding resistor 1 of the present embodiment includes a resistor 2 disposed on the surface of a resistor substrate 20 and a contact 3 sliding on the resistor 2. On the entire surface of the resistor substrate 20 on which the resistor 2 is provided, an oil coating 100 made of a fluorine-based oil having an average molecular weight of 3000 to 5000 is provided, and the oil coating has a thickness of 2 to 100 nm. is there. Further, the above-mentioned fluorine-based oil is a side chain type, and is a perfluoroalkyl polyether having an average molecular weight of 3000 to 5000.
【００２１】以下詳細に説明する。本例の摺動抵抗器１
は，図１〜図３に示すごとく，自動車のポテンショメー
タ１０を構成するものである。回転位置を検出するポテ
ンショメータ１０の抵抗体基板２０上にスクリーン印刷
等により導電性樹脂からなる抵抗体２が配設されてい
る。符号１１はポテンショメータの外郭を構成するケー
スである。The details will be described below. Sliding resistor 1 of this example
1 constitutes a potentiometer 10 of an automobile as shown in FIGS. A resistor 2 made of a conductive resin is provided on a resistor substrate 20 of the potentiometer 10 for detecting a rotational position by screen printing or the like. Reference numeral 11 denotes a case forming an outer shell of the potentiometer.
【００２２】図２，図３に示すごとく，抵抗体２は，回
転筒体３０の回転中心突起３０２の抵抗体基板２０側嵌
合孔２０２を中心とする同心円状に形成された第１抵抗
体２１（内側集電用）と，該第１抵抗体２１の外周に形
成された第２抵抗体２２（外側出力用）とからなる。言
い換えると，抵抗体２は後述する２つのコンタクト３の
移動軌跡に対応して円弧状に２列に並べた内側の第１抵
抗体２１と外側の第２抵抗体２２とより構成されてい
る。As shown in FIGS. 2 and 3, the resistor 2 is a first resistor formed concentrically around the fitting hole 202 on the resistor substrate 20 side of the rotation center projection 302 of the rotary cylinder 30. 21 (for inner current collection) and a second resistor 22 (for outer output) formed on the outer periphery of the first resistor 21. In other words, the resistor 2 includes an inner first resistor 21 and an outer second resistor 22 arranged in two rows in an arc shape corresponding to the movement locus of two contacts 3 described later.
【００２３】そして，内側の第１抵抗体２１の一端部
と，外側の抵抗体２２の両端部は，ケース１１に配され
た３つの電気端子１２との電気的導通を図るための接点
部２３を形成している。また，上記２つの抵抗体２１，
２２は，いずれもカーボンブラックと熱硬化性樹脂とし
てのフェノール樹脂よりなるポリマー抵抗体により構成
されている。One end of the inner first resistor 21 and both ends of the outer resistor 22 are connected to contact portions 23 for establishing electrical continuity with the three electric terminals 12 arranged on the case 11. Is formed. In addition, the above two resistors 21,
Reference numeral 22 denotes a polymer resistor made of carbon black and a phenol resin as a thermosetting resin.
【００２４】図３（ｂ），（ｃ），図５に示すごとく，
オイル被膜１００は抵抗体基板２０の抵抗体２が形成さ
れた面に設けられている。図３（ａ），（ｂ）に示すご
とく，コンタクト３は回転筒体３０の抵抗体基板２０と
の対向面側に固定配設されている。回転筒体３０の回転
に伴いオイル被膜１００で覆われた抵抗体２上を摺動す
ることで，コンタクト３の位置に応じた電圧が端子２３
より出力される。As shown in FIGS. 3 (b), 3 (c) and 5,
The oil coating 100 is provided on the surface of the resistor substrate 20 on which the resistor 2 is formed. As shown in FIGS. 3A and 3B, the contact 3 is fixedly provided on the rotating cylinder 30 on the side facing the resistor substrate 20. By sliding on the resistor 2 covered with the oil film 100 with the rotation of the rotary cylinder 30, a voltage corresponding to the position of the contact 3 is applied to the terminal 23.
Output.
【００２５】また，図１，図２に示すごとく，本例の自
動車用摺動抵抗器１を適用したポテンショメータ１０
は，ケース１１と抵抗体２を貼設した抵抗体基板２０と
により囲まれたその中に接点室４が設けてある。As shown in FIGS. 1 and 2, a potentiometer 10 to which the sliding resistor 1 for an automobile of this embodiment is applied.
The contact chamber 4 is provided in a case surrounded by a case 11 and a resistor substrate 20 on which the resistor 2 is attached.
【００２６】また，図２に示すごとく，ポテンショメー
タ１０のケース１１内には，上記コンタクト３を有する
回転筒体３０を回動可能に配設してある。図３（ａ）に
示すごとく，コンタクト３は導電板３９から二股に分岐
して設けられた第１コンタクト３１と第２コンタクト３
２とにより構成されており，上記回転筒体３０の上部に
固定されている。As shown in FIG. 2, a rotary cylinder 30 having the contact 3 is rotatably disposed in a case 11 of the potentiometer 10. As shown in FIG. 3A, the contact 3 is divided into a first contact 31 and a second contact
2 and is fixed to the upper part of the rotary cylinder 30.
【００２７】また，回転筒体３０は，その上方中央部に
回転中心突起３０２を有しており，これに対応する中心
穴２０２（図３（ａ）参照）が上記抵抗体基板２０の中
央部に設けられている。また，回転筒体３０は，スプリ
ング１７によって常に上方へ付勢されており，コンタク
ト３と抵抗体２との接触状態を維持するよう構成されて
いる。The rotary cylinder 30 has a rotation center protrusion 302 at the upper center thereof, and a corresponding center hole 202 (see FIG. 3A) is formed at the center of the resistor substrate 20. It is provided in. The rotating cylinder 30 is always urged upward by the spring 17 so as to maintain the contact state between the contact 3 and the resistor 2.
【００２８】フッ素系オイル１００の抵抗体基板２０へ
の塗布に当たっては，図４に示すごとく，所定濃度（溶
液濃度０．０２〜０．３％）に希釈したフッ素系オイル
１０９を揮発しないように密閉容器４３に入れ，これに
管４２を介して取り付け，内部に超音波振動子４１を備
えた超音波噴霧器４によって，直接抵抗体基板２０に噴
霧する。この方法によれば，フッ素系オイル１０９の揮
発が抑制され，濃度変化が生じないため均一な塗布を行
うことができる。In applying the fluorine-based oil 100 to the resistor substrate 20, as shown in FIG. 4, the fluorine-based oil 109 diluted to a predetermined concentration (solution concentration of 0.02 to 0.3%) is not volatilized. It is placed in a sealed container 43, attached to this via a tube 42, and sprayed directly onto the resistor substrate 20 by the ultrasonic sprayer 4 having an ultrasonic oscillator 41 inside. According to this method, volatilization of the fluorinated oil 109 is suppressed, and there is no change in concentration, so that uniform coating can be performed.
【００２９】次に，本例にかかる摺動抵抗器の性能の測
定結果について説明する。つまり，本例にかかる摺動抵
抗器をオイル被膜の厚みを違えて作製し，これらのそれ
ぞれについて高温作動耐久試験及び振動作動耐久試験を
行い，摺動ノイズが発生し始める作動回数の測定結果を
図６に示す線図に記載した。同図における実線（ａ）が
高温作動耐久試験における作動ノイズ寿命，振動作動耐
久試験における破線（ｂ）が振動寿命である。Next, the measurement results of the performance of the sliding resistor according to the present embodiment will be described. In other words, the sliding resistors according to this example were manufactured with different oil film thicknesses, and a high-temperature operation endurance test and a vibration operation endurance test were performed on each of them. This is shown in the diagram shown in FIG. The solid line (a) in FIG. 6 shows the operation noise life in the high-temperature operation endurance test, and the broken line (b) in the vibration operation endurance test shows the vibration life.
【００３０】同図によれば，オイル被膜が２ｎｍ未満で
ある場合には，作動ノイズ寿命の余裕度不足であること
が分かった。また，オイル被膜が１００ｎｍ以上である
場合には作動ノイズ寿命が高いが，振動寿命が，基準
（直線（ｃ））に対してぎりぎりのため，実用的でない
ことが分かった。According to the figure, it was found that when the oil coating was less than 2 nm, the margin of the operating noise life was insufficient. When the thickness of the oil film is 100 nm or more, the operating noise life is high, but the vibration life is marginal with respect to the reference (straight line (c)), which is not practical.
【００３１】次に，本例における作用効果につき説明す
る。本例にかかる摺動抵抗器１は図３（ｂ），（ｃ）に
示すごとく，抵抗体基板２０の抵抗体２を配設した全面
に，フッ素系オイルよりなり，厚みが２〜１００ｎｍの
オイル被膜１００が設けてある。Next, the operation and effect of this embodiment will be described. As shown in FIGS. 3B and 3C, the sliding resistor 1 according to the present embodiment is made of fluorine-based oil on the entire surface of the resistor substrate 20 where the resistor 2 is provided, and has a thickness of 2 to 100 nm. An oil coating 100 is provided.
【００３２】フッ素系オイルによるオイル被膜１００の
表面エネルギーは小さいため，図５に示すごとく，コン
タクト３が摺動することにより生じた抵抗体摩耗粉９の
−ＯＨ等の極性基と，抵抗体２上の−ＯＨ等の極性基と
の間の結合が阻害され，抵抗体摩耗粉９が抵抗体２に付
着することが防止される。これにより，抵抗体摩耗粉９
に起因する接触抵抗が小さくなり，結果として摺動ノイ
ズを生じ難くすることができる。即ち，コンタクト３に
よる抵抗体摩耗粉９の発生量の低減，抵抗体摩耗粉の払
拭性の向上を図ることができる。Since the surface energy of the oil coating 100 made of the fluorine-based oil is small, as shown in FIG. 5, a polar group such as -OH of the resistor wear powder 9 generated by sliding of the contact 3 and the resistor 2 The bond between the polar group such as -OH or the like is hindered, so that the resistor wear powder 9 is prevented from adhering to the resistor 2. As a result, the resistor wear powder 9
Therefore, the contact resistance caused by the friction can be reduced, and as a result, the sliding noise can be hardly generated. That is, it is possible to reduce the amount of the resistor wear powder 9 generated by the contact 3 and to improve the wiping performance of the resistor wear powder.
【００３３】また，上述したごときフッ素系オイルは耐
熱性に優れており，また，流動性が高いことから，例え
ば自動車のエンジンルーム内のような過酷な環境下でも
効果を得ることができる。Further, the above-mentioned fluorine-based oil has excellent heat resistance and high fluidity, so that the effect can be obtained even in a severe environment such as an engine room of an automobile.
【００３４】更に，本例にかかるオイル被膜１００は側
鎖型であるフッ素系オイルにより構成されている。側鎖
型のフッ素系オイルは，図８に示すごとく，分子が集合
することで容易に網の目構造６を形成することができ
る。この網の目構造６により分子間結合力を有効に活用
することができ，これにより，オイル被膜を基板上に均
一に形成することができる。Further, the oil coating 100 according to this embodiment is made of a side chain type fluorine-based oil. As shown in FIG. 8, the side chain type fluorine-based oil can easily form the network structure 6 by the aggregation of molecules. The network structure 6 makes it possible to effectively utilize the intermolecular bonding force, whereby the oil film can be uniformly formed on the substrate.
【００３５】従って，本例によれば，摺動ノイズが生じ
難く，耐熱性に優れた摺動抵抗体を提供することができ
る。Therefore, according to the present embodiment, it is possible to provide a sliding resistor which hardly generates sliding noise and has excellent heat resistance.
【図１】実施形態例にかかる，摺動抵抗器を内蔵するポ
テンショメータの平面図。FIG. 1 is a plan view of a potentiometer incorporating a sliding resistor according to an embodiment.
【図２】実施形態例にかかる，摺動抵抗器を内蔵するポ
テンショメータ断面図。FIG. 2 is a sectional view of a potentiometer incorporating a sliding resistor according to the embodiment;
【図３】実施形態例にかかる，（ａ）摺動抵抗器の平面
図，（ｂ）Ａ−Ａ矢視断面図，（ｃ）摺動抵抗器の側面
図。3A is a plan view of a sliding resistor, FIG. 3B is a cross-sectional view taken along line AA, and FIG. 3C is a side view of the sliding resistor according to the embodiment.
【図４】実施形態例にかかる，フッ素系オイルの塗布方
法の説明図。FIG. 4 is an explanatory diagram of a method of applying a fluorine-based oil according to the embodiment.
【図５】実施形態例にかかる，コンタクトと抵抗体と抵
抗体摩耗粉との状態を示す説明図。FIG. 5 is an explanatory view showing a state of a contact, a resistor, and resistor wear powder according to the embodiment.
【図６】実施形態例にかかる，作動ノイズ寿命と振動寿
命とオイル被膜厚さとの関係を示す線図。FIG. 6 is a diagram showing a relationship between an operating noise life, a vibration life, and an oil film thickness according to the embodiment.
【図７】本発明にかかる，フッ素系オイルの平均分子量
と１３０℃における蒸発量と流動点との間の関係を示す
線図。FIG. 7 is a graph showing the relationship between the average molecular weight of a fluorinated oil, the amount of evaporation at 130 ° C., and the pour point according to the present invention.
【図８】本発明にかかる，直鎖型のフッ素オイルの分子
構造を示す説明図。FIG. 8 is an explanatory view showing a molecular structure of a linear type fluorine oil according to the present invention.
【図９】本発明にかかる，側鎖型のフッ素オイルの分子
構造を示す説明図。FIG. 9 is an explanatory view showing the molecular structure of a side chain type fluorine oil according to the present invention.
【図１０】本発明にかかる，側鎖型のフッ素オイルの分
子が集積した状態を示す説明図。FIG. 10 is an explanatory view showing a state in which molecules of a side chain type fluorine oil accumulate according to the present invention.
【図１１】摺動抵抗器において，抵抗体とコンタクトと
の電気的接触の状態の測定方法の説明図。FIG. 11 is an explanatory diagram of a method of measuring a state of electrical contact between a resistor and a contact in a sliding resistor.
【図１２】従来例にかかる摺動抵抗器において，コンタ
クトと抵抗体と抵抗体摩耗粉との状態を示す説明図。FIG. 12 is an explanatory diagram showing a state of a contact, a resistor, and resistor wear powder in a sliding resistor according to a conventional example.
１．．．摺動抵抗器， １００．．．オイル被膜， ２．．．抵抗体， ２０．．．抵抗体基板， ３．．．コンタクト， 1. . . Sliding resistor, 100. . . Oil coating, 2. . . Resistor, 20. . . 2. Resistor substrate, . . contact,
Claims (2)
と，該抵抗体上を摺動するコンタクトよりなり，上記抵
抗体基板の抵抗体を配設した表面の全面ないし，該表面
であって少なくとも上記コンタクトが摺動する部分には
平均分子量が３０００〜５０００であるフッ素系オイル
よりなるオイル被膜が設けてあり，更に，上記オイル被
膜の厚みは２〜１００ｎｍであることを特徴とする摺動
抵抗器。A resistor disposed on the surface of the resistor substrate and a contact sliding on the resistor, wherein the resistor is provided on the entire surface of the resistor substrate on which the resistor is disposed or on the surface; An oil coating made of a fluorine-based oil having an average molecular weight of 3,000 to 5,000 is provided at least at a portion where the contact slides, and the oil coating has a thickness of 2 to 100 nm. Sliding resistor.
は側鎖型であることを特徴とする摺動抵抗器。2. The sliding resistor according to claim 1, wherein said fluorine-based oil is of a side chain type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8286598A JPH11260606A (en) | 1998-03-13 | 1998-03-13 | Sliding resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8286598A JPH11260606A (en) | 1998-03-13 | 1998-03-13 | Sliding resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11260606A true JPH11260606A (en) | 1999-09-24 |
Family
ID=13786232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8286598A Pending JPH11260606A (en) | 1998-03-13 | 1998-03-13 | Sliding resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11260606A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001215102A (en) * | 2000-02-03 | 2001-08-10 | Mikuni Corp | Position detector |
| JP2003013974A (en) * | 2001-06-29 | 2003-01-15 | Nsk Ltd | Rolling unit |
| JP2007317971A (en) * | 2006-05-29 | 2007-12-06 | Mikuni Corp | Position sensor |
| JP2009012654A (en) * | 2007-07-05 | 2009-01-22 | Toyota Motor Corp | Stroke sensor abnormality determination device |
| JP2012238584A (en) * | 2011-04-27 | 2012-12-06 | Hitachi Ltd | Grease for electrical contact and slide electricity structure, power switching device, vacuum circuit breaker, vacuum insulated switchgear, and method for assembling vacuum insulated switchgear |
-
1998
- 1998-03-13 JP JP8286598A patent/JPH11260606A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001215102A (en) * | 2000-02-03 | 2001-08-10 | Mikuni Corp | Position detector |
| JP2003013974A (en) * | 2001-06-29 | 2003-01-15 | Nsk Ltd | Rolling unit |
| JP2007317971A (en) * | 2006-05-29 | 2007-12-06 | Mikuni Corp | Position sensor |
| JP2009012654A (en) * | 2007-07-05 | 2009-01-22 | Toyota Motor Corp | Stroke sensor abnormality determination device |
| JP4506791B2 (en) * | 2007-07-05 | 2010-07-21 | トヨタ自動車株式会社 | Stroke sensor abnormality determination device |
| US8244430B2 (en) | 2007-07-05 | 2012-08-14 | Toyota Jidosha Kabushiki Kaisha | Stroke sensor abnormality determining device and determining method, and brake control device and method |
| DE112008001750B4 (en) * | 2007-07-05 | 2013-02-28 | Toyota Jidosha K.K. | Apparatus and method for determining an abnormality of a stroke sensor and brake control apparatus and method |
| JP2012238584A (en) * | 2011-04-27 | 2012-12-06 | Hitachi Ltd | Grease for electrical contact and slide electricity structure, power switching device, vacuum circuit breaker, vacuum insulated switchgear, and method for assembling vacuum insulated switchgear |
| US9238784B2 (en) | 2011-04-27 | 2016-01-19 | Hitachi, Ltd. | Grease for electrical contact and slide electricity structure, power switch, vacuum circuit breaker, vacuum insulated switchgear, and vacuum-insulated switchgear assembling method |
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