JP3975903B2 - Rotating operation type variable resistor - Google Patents

Rotating operation type variable resistor Download PDF

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Publication number
JP3975903B2
JP3975903B2 JP2002357570A JP2002357570A JP3975903B2 JP 3975903 B2 JP3975903 B2 JP 3975903B2 JP 2002357570 A JP2002357570 A JP 2002357570A JP 2002357570 A JP2002357570 A JP 2002357570A JP 3975903 B2 JP3975903 B2 JP 3975903B2
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JP
Japan
Prior art keywords
resistance film
resistor
conductor
current collector
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.)
Expired - Fee Related
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JP2002357570A
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Japanese (ja)
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JP2004193235A (en
Inventor
弘昌 久宗
憲治 片岡
幸夫 橋本
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 Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP2002357570A priority Critical patent/JP3975903B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、車載用エアコンの温度調節やモード切替等に使用されるような360度の全周に亘って回転操作が可能な回転操作型可変抵抗器に関するものである。
【0002】
【従来の技術】
近年、車載用機器の高機能化、高級化により車載用エアコンの温度調節やモード切替として用いられる回転操作型可変抵抗器において、使用モードの一方の端から他方の端に変更する際に少ない回転操作ですむように回転操作範囲に規制のない360度の全周に亘って回転操作が可能なもの、そして僅かな温度制御も可能とすべく分解能の良い回転操作型可変抵抗器が望まれている。
【0003】
なお、ここで用いる分解能とは、可変抵抗器の出力電圧を調節できる精度を言う。
【0004】
このような360度の全周で回転操作が可能な回転操作型可変抵抗器は、例えば、抵抗体と第1の集電体と第2の集電体を同心円状に形成してこれら摺動パターンの引き出し部が不感領域となっている基板に対し、上記抵抗体と第1の集電体上を摺接する第1の摺動子、そして上記抵抗体と第2の集電体上を摺接する第2の摺動子を位相をずらして摺接させる構成とし、一方の摺動子が不感領域上に位置するときに他方の摺動子が不感領域外に位置するものが多く知られている。
【0005】
なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献1、特許文献2が知られている。
【0006】
【特許文献1】
実開平5−38807号公報
【特許文献2】
特開2000−260607号公報
【0007】
【発明が解決しようとする課題】
しかしながら上記従来の回転操作型可変抵抗器においては、360度の全周で回転操作中の出力は得られるが、分解能を向上するには、抵抗皮膜を印刷形成した際の皮膜端面のにじみや皮膜厚みの不均一さの影響を軽減する必要があるため、抵抗皮膜の幅を広くする方法あるいは抵抗皮膜の側部をトリミングして精度を向上させる方法があるものの、前者は製品寸法的な問題を有し、後者は製造工数が多大にかかるため、安価に実現することは難しいという課題があった。
【0008】
本発明は、このような従来の課題を解決するものであり、360度の全周で回転操作に伴う出力が得られると共に、部品点数が少なくて分解能を向上させた回転操作型可変抵抗器を提供することを目的とする。
【0009】
【課題を解決するための手段】
上記目的を達成するために本発明は、以下の構成を有するものである。
【0010】
本発明の請求項1に記載の発明は、円環状の抵抗皮膜と、その抵抗皮膜に接続された二箇所の導体部と、上記抵抗皮膜に重なることなく同心円状に、上記二箇所の導体部で分割された一方の領域に円弧形状に配された第一集電部と、上記抵抗皮膜および上記第一集電部に重なることなく同心円状に、上記二箇所の導体部で分割された他方の領域に円弧形状に配された第二集電部と、上記二箇所の導体部をそれぞれ覆い、上記円弧形状の第一集電部と第二集電部の両端部それぞれが上記二箇所の導体部と交差する部分を絶縁する絶縁部と、360度の全周で回転操作が可能な操作軸に連動し、上記抵抗皮膜、第一集電部および第二集電部上をそれぞれ摺接する少なくとも三つの接触部を備えた摺動子とを備え、上記二箇所の導体部の接続位置を境とする一方側の抵抗皮膜部分と第一集電部とを上記摺動子が摺接して構成される第一抵抗器部および他方側の抵抗皮膜部分と第二集電部とを上記摺動子が摺接して構成される第二抵抗器を有する回転操作型可変抵抗器としたものであり、円環状の抵抗皮膜に接続された二箇所の導体部を境として同一円周上に二つの抵抗器部を構成したことによって、抵抗皮膜および摺動子などの数を増やすことなく360度の全周で回転操作に伴う出力が得られると共に導体部間に所定の印加電圧を加えて使用することにより、円環状の抵抗皮膜を分割した状態でその各々に上記印加電圧を加えられるものにできるため、分解能を向上させた回転操作型可変抵抗器にできるという作用を有する。
【0011】
請求項2に記載の発明は、請求項1記載の発明において、二箇所の導体部の接続位置が、円環状の抵抗皮膜外周の対向位置に設定してあるものであり、円環状の抵抗皮膜が180度間隔で分割されたものにできるため、操作角度に対する分解能も同じものになるので使いやすい回転操作型可変抵抗器とすることができるという作用を有する。
【0012】
【発明の実施の形態】
以下、本発明の一実施の形態について、図1〜図4を用いて説明する。
【0013】
(実施の形態)
図1は本発明の一実施の形態による回転操作型可変抵抗器の断面図、図2は同回転操作型可変抵抗器の概念図であり、同図において、1は上方開口の絶縁樹脂製のケースで、その上方開口の凹部底面には、中央の円形孔1Aと位置を合わせて、円形孔2Aを中心に有する絶縁性の抵抗体基板2がインサート成形されて固定されている。
【0014】
そして、3は絶縁樹脂製の操作軸で、カバー4によってケース1の開口部を塞ぐように結合された軸受5の中孔5Aから外方に突出するように挿通支持されると共に、下面中央の突起3Aが抵抗体基板2の円形孔2Aおよびケース1の円形孔1Aに挿通保持されて360度回転操作可能になっている。
【0015】
また、この操作軸3の下面には、弾性金属板製の摺動子6が固着されており、その摺動子6には、互いに導通状態となっている三つの接触部7(7A,7B,7C)が操作軸3の回転中心から半径方向に延びる一直線上に配され、各々抵抗体基板2上に弾接している。
【0016】
そして、この抵抗体基板2の上面には、図2の回転操作型可変抵抗器の概念図に示すように、円形孔2Aと同心でその周囲に円環状に抵抗皮膜8が配されると共に、その抵抗皮膜8に重なることなくその外周左側に同心円状に円弧形状に良導電性の第一集電部9、ならびにその抵抗皮膜8および第一集電部9に重なることなく抵抗皮膜8の外周右側に同心円状に円弧形状の良導電性の第二集電部10が印刷形成されている。
【0017】
そして、上記円環状の抵抗皮膜8の上方と下方位置の180度対向する二箇所から外方に向けて抵抗皮膜8と各々電気的に接続された第一、第二導体部11,12が引き出されており、その第一、第二導体部11,12によって抵抗皮膜8は、左側の半円部分の第一抵抗皮膜部8Aと右側の半円部分の第二抵抗皮膜部8Bとに構成されたものとなっている。
【0018】
また、上記第一、第二導体部11,12の上記第一集電部9および第二集電部10と交差する部分には、それらの厚み方向の中間位置に絶縁レジスト13が印刷形成され、電気的な絶縁状態が確保されている。
【0019】
そして、これらの抵抗体基板2上に印刷形成された第一集電部9、第二集電部10および二箇所の第一、第二導体部11,12は、それぞれ導出部14,15および11A,12Aにより抵抗体基板2の一方の端部に引き出されて、かしめ等で固着された端子16,17および18,19と導通している。
【0020】
そして、上記操作軸3に固着された摺動子6は、回転操作された際に、その第一接触部7Aが抵抗皮膜8上を、第二接触部7Bが第一集電部9上を、そして第三接触部7Cが第二集電部10上を摺動するように抵抗体基板2に弾接している。
【0021】
以上のように構成された回転操作型可変抵抗器において、続いて、その動作を説明する。
【0022】
まず、図2に示すように、操作軸3を回転操作した際に、摺動子6の第一接触部7Aと第二接触部7Bが第一抵抗皮膜8Aと第一集電部9の表面を摺動する角度範囲においては第一抵抗器部が構成され、第一導体部11と繋がった端子18および第二導体部12と繋がった端子19に加えた印加電圧に対し端子18と端子16の間で出力電圧を取り出すことができる。
【0023】
なお、その回転摺動範囲において第三接触部7Cは、第二集電部10が印刷されていない範囲を摺動する。
【0024】
そして、図2に示す状態から、さらに操作軸3を時計方向に回転させると、第一接触部7Aおよび第二接触部7Bが第二導体部12の上方に位置する状態になると共に、第三接触部7Cも第二集電部10上に弾接した状態となる。
【0025】
その状態からさらに続けて操作軸3を回転させると、第二接触部7Bは第一集電部9上から外れ、第一接触部7Aと第三接触部7Cは第二抵抗皮膜8Bと第二集電部10上をそれぞれ摺動し、それらで第二抵抗器部が構成され、同様に端子18と端子19に加えた印加電圧に対し端子18と端子17の間で出力電圧を取り出すことができる。
【0026】
そして、このように構成される第一および第二抵抗器部の出力電圧特性図を図3に示す。
【0027】
この図3に示すように、第一抵抗器部は、摺動子6の第二接触部7Bが第一集電部9上を摺動する範囲で有効な出力が得られ、第二抵抗器部は、第三接触部7Cが第二集電部10上を摺動する範囲で有効な出力が得られ、第一抵抗器部および第二抵抗器部の出力電圧比が0%または100%となる二箇所の第一、第二導体部11,12の位置を摺動子6の第一接触部7Aが通過する場合は両方の第一、第二抵抗器部から有効な出力が得られる。
【0028】
従って、第一抵抗器部および第二抵抗器部の出力電圧の両方を入力とするように用いることにより、360度の全周で回転操作が可能でありながら抵抗皮膜8を増やすことなくまた摺動子6も単純な構成のものが一つのみで全周に亘って上記出力が得られる回転操作型可変抵抗器を実現することができる。
【0029】
次に、本実施の形態による回転操作型可変抵抗器の分解能について図4を用いて説明する。
【0030】
図4は分解能を説明するための概要図で、実測出力電圧と回転角度の関係を表わしており、抵抗皮膜8の形成時における皮膜端面のにじみや皮膜厚みのばらつきなどにより実測出力電圧は規定変化特性からずれCが発生する。
【0031】
そのため、ある回転角度のA位置において、A位置のずれCの影響を考慮した場合、それを受けない回転角度は同図に示すようにB位置までとなり、このA位置とB位置の回転角度差が出力電圧を調節できる精度としての分解能となる。
【0032】
基板に印刷形成される通常の抵抗皮膜は、ずれが3〜4%程度生じるものであり、例えば、ずれが4%の場合は、抵抗皮膜の始終端に印加する印加電圧である全出力電圧(100%)をずれ(4%)で割った値の25の分解能のものとなり、25段階で出力電圧を調節できる可変抵抗器になる。
【0033】
ここで、本実施の形態による可変抵抗器の場合であると、印刷形成される抵抗皮膜8のずれは、従来と同じ4%として、第一導体部11と第二導体部12の間に電圧を印加するので、左半分の第一抵抗皮膜8A上を第一接触部7Aが摺動する第一抵抗器部の180度の回転範囲で25段階となり、同様に右半分の第二抵抗皮膜8B上を第一接触部7Aが摺動する第二抵抗器部の180度の回転範囲でも25段階となって、360度回転操作により従来の2倍の分解能が得られるものとなる。
【0034】
このように本実施の形態によれば、抵抗皮膜8を円環状として、それに二箇所の導体部を接続することで、また摺動子6を複数用いることもなく容易かつ安価に分解能を向上させたものにできる。
【0035】
そして、本実施の形態のもののように、第一導体部11と第二導体部12における抵抗皮膜8への接続位置を180度対向した位置とすると、第一抵抗器部と第二抵抗器部の分解能が同じ操作角度条件で得られるものにできるため、使用される機器で使い易いものにすることができる。
【0036】
【発明の効果】
以上のように本発明によれば、360度の全周に亘って回転操作ができて所定出力が得られると共に、摺動子などの部品点数も少なく、かつ分解能を向上させた回転操作型可変抵抗器を容易かつ安価に得ることができるという有利な効果が得られる。
【図面の簡単な説明】
【図1】本発明の一実施の形態による回転操作型可変抵抗器の断面図
【図2】同回転操作型可変抵抗器の概念図
【図3】同出力電圧特性図
【図4】同分解能を説明するための概要図
【符号の説明】
1 ケース
1A,2A 円形孔
2 抵抗体基板
3 操作軸
3A 突起
4 カバー
5 軸受
5A 中孔
6 摺動子
7 接触部
7A 第一接触部
7B 第二接触部
7C 第三接触部
8 抵抗皮膜
8A 第一抵抗皮膜部
8B 第二抵抗皮膜部
9 第一集電部
10 第二集電部
11 第一導体部
11A,12A,14,15 導出部
12 第二導体部
13 絶縁レジスト
16,17,18,19 端子
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary operation type variable resistor that can be rotated over the entire circumference of 360 degrees as used for temperature adjustment, mode switching, and the like of an on-vehicle air conditioner.
[0002]
[Prior art]
In recent years, in a rotary operation type variable resistor used for temperature control and mode switching of an in-vehicle air conditioner due to higher functions and higher grades of in-vehicle devices, less rotation is required when changing from one end of the usage mode to the other end. There is a demand for a rotary operation type variable resistor that can be rotated over the entire circumference of 360 degrees without restriction on the rotation operation range and that has a high resolution so that slight temperature control is possible.
[0003]
The resolution used here refers to the accuracy with which the output voltage of the variable resistor can be adjusted.
[0004]
Such a rotary operation type variable resistor capable of rotating operation around the entire circumference of 360 degrees is formed by, for example, forming a resistor, a first current collector, and a second current collector concentrically, and sliding them. A first slider that is in sliding contact with the resistor and the first current collector, and a resistor that slides over the resistor and the second current collector with respect to the substrate in which the pattern lead-out portion is a dead area. It is known that the second slider that comes into contact is in sliding contact with a phase shift, and when one slider is located on the dead area, the other slider is located outside the dead area. Yes.
[0005]
As prior art document information related to the invention of this application, for example, Patent Document 1 and Patent Document 2 are known.
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 5-38807 [Patent Document 2]
Japanese Patent Laid-Open No. 2000-260607
[Problems to be solved by the invention]
However, in the above-mentioned conventional rotary operation type variable resistor, an output during the rotation operation can be obtained over the entire 360 ° circumference, but in order to improve the resolution, the smear and the film on the film end face when the resistance film is formed by printing are provided. Since it is necessary to reduce the effect of uneven thickness, there is a method to increase the width of the resistive film or a method to improve the accuracy by trimming the sides of the resistive film. However, the latter has a problem that it is difficult to realize at low cost because it takes a lot of manufacturing steps.
[0008]
The present invention solves such a conventional problem, and provides a rotary operation type variable resistor which has an output associated with a rotation operation over the entire circumference of 360 degrees and has a reduced number of parts and an improved resolution. The purpose is to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
[0010]
The invention according to claim 1 of the present invention includes an annular resistance film, two conductor parts connected to the resistance film, and the two conductor parts concentrically without overlapping the resistance film. A first current collecting part arranged in an arc shape in one region divided by the above, and the other divided by the two conductor parts concentrically without overlapping the resistance film and the first current collecting part Each of the two current collectors arranged in an arc shape in the region and the two conductor parts, and both ends of the arc-shaped first current collector part and the second current collector part The insulating part that insulates the part that intersects the conductor part, and the operation shaft that can be rotated around the entire 360 degrees, are in sliding contact with the resistance film, the first current collecting part, and the second current collecting part, respectively. And a slider having at least three contact portions, and connecting positions of the two conductor portions. The first resistor part configured by sliding the slider on one side of the resistive film part and the first current collecting part, and the sliding part on the other side of the resistive film part and the second current collecting part. It is a rotary operation type variable resistor having a second resistor constructed by sliding a child, and two conductors connected to an annular resistance film are used as two boundaries on the same circumference. By configuring the resistor section, it is possible to obtain an output associated with the rotation operation over the entire circumference of 360 degrees without increasing the number of resistance films, sliders, etc., and to apply a predetermined applied voltage between the conductor sections. Thus, since the above-mentioned applied voltage can be applied to each of the annular resistance films in a divided state, the rotary operation type variable resistor having improved resolution can be obtained.
[0011]
The invention according to claim 2 is the invention according to claim 1, wherein the connection position of the two conductor portions is set at the opposing position of the outer periphery of the annular resistance film, and the annular resistance film Can be divided at intervals of 180 degrees, so that the resolution with respect to the operation angle is the same, so that the rotary operation type variable resistor can be easily used.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0013]
(Embodiment)
FIG. 1 is a cross-sectional view of a rotary operation type variable resistor according to an embodiment of the present invention. FIG. 2 is a conceptual diagram of the rotary operation type variable resistor. In FIG. In the case, an insulating resistor substrate 2 centered on the circular hole 2A is insert-molded and fixed to the bottom surface of the concave portion of the upper opening in alignment with the central circular hole 1A.
[0014]
An operation shaft 3 made of an insulating resin is inserted and supported so as to protrude outward from the inner hole 5A of the bearing 5 coupled so as to close the opening of the case 1 by the cover 4, and at the center of the lower surface. The protrusion 3A is inserted and held in the circular hole 2A of the resistor substrate 2 and the circular hole 1A of the case 1 so that it can be rotated 360 degrees.
[0015]
Further, a slider 6 made of an elastic metal plate is fixed to the lower surface of the operation shaft 3, and the slider 6 has three contact portions 7 (7 </ b> A, 7 </ b> B) that are in conduction with each other. , 7C) are arranged on a straight line extending in the radial direction from the rotation center of the operation shaft 3, and are in elastic contact with the resistor substrate 2, respectively.
[0016]
Then, on the upper surface of the resistor substrate 2, as shown in the conceptual diagram of the rotary operation type variable resistor of FIG. 2, a resistance film 8 is arranged concentrically with the circular hole 2A and around it, On the left side of the outer periphery without overlapping with the resistance film 8, the outer periphery of the resistance film 8 without overlapping the resistance film 8 and the first current collection part 9, and the first conductive part 9 with a good concentric circular arc shape. On the right side, a concentric arc-shaped well-conductive second current collector 10 is printed.
[0017]
And the 1st, 2nd conductor parts 11 and 12 which were each electrically connected with the resistance film 8 toward the outward from the two places which are 180 degree | times facing the upper and lower positions of the said annular resistance film 8 are pulled out. The first and second conductor parts 11 and 12 constitute the resistance film 8 into a first resistance film part 8A in the left semicircle part and a second resistance film part 8B in the right semicircle part. It has become.
[0018]
Further, an insulating resist 13 is printed and formed at an intermediate position in the thickness direction of the first and second conductor portions 11 and 12 at a portion intersecting with the first current collector 9 and the second current collector 10. Electrical insulation is ensured.
[0019]
The first current collector 9, the second current collector 10, and the two first and second conductors 11 and 12 printed on the resistor substrate 2 are respectively connected to the lead-out parts 14 and 15 and 11A and 12A are drawn out to one end of the resistor substrate 2 and are electrically connected to terminals 16, 17 and 18, 19 fixed by caulking or the like.
[0020]
When the slider 6 fixed to the operation shaft 3 is rotated, the first contact portion 7A is on the resistance film 8 and the second contact portion 7B is on the first current collector 9. The third contact portion 7C is in elastic contact with the resistor substrate 2 so as to slide on the second current collecting portion 10.
[0021]
Next, the operation of the rotary operation type variable resistor configured as described above will be described.
[0022]
First, as shown in FIG. 2, when the operation shaft 3 is rotated, the first contact portion 7 </ b> A and the second contact portion 7 </ b> B of the slider 6 are formed on the surfaces of the first resistance film 8 </ b> A and the first current collector 9. The first resistor portion is configured in an angle range in which the terminal 18 and the terminal 16 are applied to the applied voltage applied to the terminal 18 connected to the first conductor portion 11 and the terminal 19 connected to the second conductor portion 12. The output voltage can be taken out between.
[0023]
In addition, in the rotational sliding range, the third contact portion 7C slides in a range where the second current collecting portion 10 is not printed.
[0024]
When the operation shaft 3 is further rotated clockwise from the state shown in FIG. 2, the first contact portion 7A and the second contact portion 7B are positioned above the second conductor portion 12, and the third contact The contact portion 7 </ b> C is also in elastic contact with the second current collector 10.
[0025]
When the operating shaft 3 is further rotated from this state, the second contact portion 7B is detached from the first current collecting portion 9, and the first contact portion 7A and the third contact portion 7C are connected to the second resistance film 8B and the second resistance film 8B. Each of them slides on the current collecting unit 10 to form a second resistor unit. Similarly, an output voltage can be extracted between the terminal 18 and the terminal 17 with respect to the applied voltage applied to the terminal 18 and the terminal 19. it can.
[0026]
And the output voltage characteristic figure of the 1st and 2nd resistor part comprised in this way is shown in FIG.
[0027]
As shown in FIG. 3, the first resistor portion has an effective output within a range in which the second contact portion 7 </ b> B of the slider 6 slides on the first current collecting portion 9. The effective output is obtained in the range where the third contact portion 7C slides on the second current collecting portion 10, and the output voltage ratio of the first resistor portion and the second resistor portion is 0% or 100%. When the first contact portion 7A of the slider 6 passes through the positions of the first and second conductor portions 11 and 12 at two locations, effective outputs are obtained from both the first and second resistor portions. .
[0028]
Therefore, by using both of the output voltages of the first resistor unit and the second resistor unit as inputs, it is possible to rotate all around 360 degrees, but without increasing the resistance film 8, it can be slid again. It is possible to realize a rotary operation type variable resistor in which only one moving element 6 has a simple configuration and the above output can be obtained over the entire circumference.
[0029]
Next, the resolution of the rotary operation type variable resistor according to the present embodiment will be described with reference to FIG.
[0030]
FIG. 4 is a schematic diagram for explaining the resolution, and shows the relationship between the measured output voltage and the rotation angle. The measured output voltage changes according to the blurring of the coating end face and the variation of the coating thickness when the resistive coating 8 is formed. Deviation C occurs from the characteristics.
[0031]
Therefore, when the influence of the deviation C of the A position is taken into consideration at the A position of a certain rotation angle, the rotation angle that does not receive it is up to the B position as shown in the figure, and the rotation angle difference between the A position and the B position. Is the resolution as the accuracy with which the output voltage can be adjusted.
[0032]
A normal resistive film printed on a substrate has a deviation of about 3 to 4%. For example, when the deviation is 4%, the total output voltage (applied voltage applied to the start and end of the resistive film) 100%) divided by the deviation (4%), which has a resolution of 25, becomes a variable resistor that can adjust the output voltage in 25 steps.
[0033]
Here, in the case of the variable resistor according to the present embodiment, the deviation of the printed resistance film 8 is assumed to be 4%, which is the same as the conventional case, and the voltage between the first conductor portion 11 and the second conductor portion 12 is set. Therefore, there are 25 steps in the 180 ° rotation range of the first resistor portion on which the first contact portion 7A slides on the first half first resistance film 8A, and similarly the second half second resistance film 8B. Even in the 180-degree rotation range of the second resistor portion on which the first contact portion 7A slides, there are 25 steps, and a 360-degree rotation operation can provide twice the resolution as before.
[0034]
As described above, according to the present embodiment, the resistance film 8 is formed in an annular shape, and the two conductor portions are connected thereto, and the resolution can be improved easily and inexpensively without using a plurality of sliders 6. Can be
[0035]
And if the connection position to the resistance film 8 in the 1st conductor part 11 and the 2nd conductor part 12 is made into the position which opposed 180 degree | times like the thing of this Embodiment, a 1st resistor part and a 2nd resistor part Can be obtained under the same operating angle condition, and can be easily used in the equipment used.
[0036]
【The invention's effect】
As described above, according to the present invention, a rotary operation can be performed over 360 degrees and a predetermined output can be obtained, the number of parts such as a slider is small, and the resolution is improved. The advantageous effect that the resistor can be obtained easily and inexpensively is obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a rotationally operated variable resistor according to an embodiment of the present invention. FIG. 2 is a conceptual diagram of the rotationally operated variable resistor. FIG. 3 is an output voltage characteristic diagram. Schematic diagram for explaining [Description of symbols]
DESCRIPTION OF SYMBOLS 1 Case 1A, 2A Circular hole 2 Resistor board 3 Operation shaft 3A Protrusion 4 Cover 5 Bearing 5A Middle hole 6 Slider 7 Contact part 7A First contact part 7B Second contact part 7C Third contact part 8 Resistance film 8A First 1 resistance film part 8B 2nd resistance film part 9 1st current collection part 10 2nd current collection part 11 1st conductor part 11A, 12A, 14, 15 Lead-out part 12 2nd conductor part 13 Insulation resist 16, 17, 18, 19 terminals

Claims (2)

円環状の抵抗皮膜と、その抵抗皮膜に接続された二箇所の導体部と、上記抵抗皮膜に重なることなく同心円状に、上記二箇所の導体部で分割された一方の領域に円弧形状に配された第一集電部と、上記抵抗皮膜および上記第一集電部に重なることなく同心円状に、上記二箇所の導体部で分割された他方の領域に円弧形状に配された第二集電部と、上記二箇所の導体部をそれぞれ覆い、上記円弧形状の第一集電部と第二集電部の両端部それぞれが上記二箇所に導体部と交差する部分を絶縁する絶縁部と、360度の全周で回転操作が可能な操作軸に連動し、上記抵抗皮膜、第一集電部および第二集電部上をそれぞれ摺接する少なくとも三つの接触部を備えた摺動子とを備え、上記二箇所の導体部の接続位置を境とする一方側の抵抗皮膜部分と第一集電部とを上記摺動子が摺接して構成される第一抵抗器部および他方側の抵抗皮膜部分と第二集電部とを上記摺動子が摺接して構成される第二抵抗器を有する回転操作型可変抵抗器。An annular resistance film, two conductor portions connected to the resistance film, and a concentric circle without overlapping the resistance film, arranged in an arc shape in one region divided by the two conductor portions. The second current collector arranged in an arc shape in the other region divided by the two conductor portions concentrically without overlapping the first current collector portion and the resistive film and the first current collector portion An insulating part that covers the electric part and the two conductor parts, respectively, and insulates the portions where the arc-shaped first current collecting part and the second current collecting part each intersect the conductor part at the two places; A slider provided with at least three contact portions that slide in contact with the resistance film, the first current collecting portion, and the second current collecting portion in conjunction with an operation shaft that can be rotated around 360 degrees. A resistance film portion on one side and a second boundary with the connection position of the two conductor portions as a boundary. A first resistor configured by sliding contact with the current collector and a second resistor configured by sliding contact between the resistance film portion on the other side and the second current collector Operation type variable resistor. 二箇所の導体部の接続位置が、円環状の抵抗皮膜外周の対向位置に設定してある請求項1記載の回転操作型可変抵抗器。2. The rotary operation type variable resistor according to claim 1, wherein the connection positions of the two conductor portions are set at opposing positions on the outer periphery of the annular resistance film.
JP2002357570A 2002-12-10 2002-12-10 Rotating operation type variable resistor Expired - Fee Related JP3975903B2 (en)

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JP3975903B2 true JP3975903B2 (en) 2007-09-12

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