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JP3549431B2 - Rotating electrical parts - Google Patents

Rotating electrical parts Download PDF

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Publication number
JP3549431B2
JP3549431B2 JP07830099A JP7830099A JP3549431B2 JP 3549431 B2 JP3549431 B2 JP 3549431B2 JP 07830099 A JP07830099 A JP 07830099A JP 7830099 A JP7830099 A JP 7830099A JP 3549431 B2 JP3549431 B2 JP 3549431B2
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JP
Japan
Prior art keywords
bearing
driving body
electric component
shaft
rotary electric
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
Application number
JP07830099A
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Japanese (ja)
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JP2000277308A (en
Inventor
秀安 林
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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
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Priority to JP07830099A priority Critical patent/JP3549431B2/en
Publication of JP2000277308A publication Critical patent/JP2000277308A/en
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  • Adjustable Resistors (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、可変抵抗器、又はスイッチなどの回転型電気部品の回転部の構造に関し、特に回転操作時に発生するクリック機構に関する。
【0002】
【従来の技術】
従来の回転型電気部品、例えば可変抵抗器のクリック機構としては、特開平10−70015号がある。この従来の可変抵抗器のクリック機構を図13に示す。図13は可変抵抗器のクリック機構を示す断面図で、図において、軸受け21は、合成樹脂などの絶縁材で略円筒状に形成されており、この軸受け21には、軸部21aと、この軸部21aに形成された貫通孔21bと、同軸的に傘状に開き、傾斜角45度の内周面に形成された、複数個の山部と谷部からなる凹凸部21cとが設けられている。
【0003】
操作軸22は、合成樹脂などの絶縁材で略円柱状に形成されており、前記軸受け21の貫通孔21bを貫通して外方へ突出される操作部22aと、この操作部22aの後端部には略円盤状の回転体22bが設けられている。この回転体22bの下面には、摺動子23が固着され、この上面には、後述するコイルばねが、前記操作部22aに連接された基部22cに装着されたものとなっている。また、この基部22cには十字状に配置された突部22dが設けられ、この突部22dに、後述する駆動体がスプライン結合されて取り付けられている。
【0004】
駆動体24は、合成樹脂などの絶縁材で略円錐台形に形成されており、この駆動体24の中心部には、前記操作軸22の基部22cに設けられた突部22dにスプライン結合される、十字状の貫通孔24aが設けられている。また、前記駆動体24の円錐台形の傾斜部は、45度の傾斜に形成され、複数個の傘歯車状の凹凸部24bが形成されている。さらに、前記十字状の貫通孔24aに連接されて、後述するコイルばねが収容される円形の穴24cが設けられている。
【0005】
コイルばね25は、ピアノ線からなり、前記駆動体24の傘歯車状の凹凸部24bを前記軸受け21の凹凸部21c側へ付勢している。
【0006】
次に、この可変抵抗器の動作について説明する。前記操作軸22を回動させると、前記操作軸22の十字状に設けられた突部22dと前記駆動体24の十字状の貫通孔24aとが係合していることから、前記駆動体24は前記操作軸22と共に回動される。この時、前記駆動体24の凹凸部24bは、前記コイルばね25によって前記軸受け21の凹凸部21cに付勢されていることから、この凹凸部24b、21cの相互の山と谷を越えることとなり、この時にクリック感が得られるものとなる。
【0007】
【発明が解決しようとする課題】
しかしながら、上述した従来の可変抵抗器のクリック機構においては、クリック機構を構成する凹凸部が、軸受け21の内周面と駆動体24の傾斜部に形成されており、また、駆動体24の十字状の貫通孔24aが操作軸22の基部22cに設けられた十字状の突部22dにスプライン結合されていることから、部品寸法上の理由で、操作軸22の径を大きくすることが難しく、この突部22dの径も小さく形成しなければならないため、操作軸22と駆動体24との結合部にガタが発生してしまい、操作時のフィーリングが悪くなるという問題があった。
【0008】
また、コイルばね25が操作軸22の基部22cに装着されており、操作軸22の十字状の突部22dに係合された駆動体24を軸受け21側へ付勢していることから、付勢方向の長さが長くなり、製品の薄型化が困難であるという問題があった。また、コイルばね25自身も回転体22bの回転に伴って回転するため、回転範囲のスペースを確保しなければならず、製品の小型化が困難であるという問題もあった。
【0009】
また、コイルばね25の座巻き部分が、操作軸22の後端部に設けられた回転体22bに直接当接しており、荷重が加わるため、回転体22bが変形を起こし、摺動子23が正常に摺動しないことから、回転体22bの肉厚を厚くしなければという問題があった。
【0010】
したがって、本発明では上述した問題点を解決し、クリック機構を構成する凹凸部が形成された部材と、操作軸間の、操作時のガタの発生を小さくすることが可能で、かつ、駆動体を付勢するばね部材の影響を受けずに製品の小型化、薄型化が図れる、可変抵抗器などの回転型電気部品のクリック機構を提供することを目的とする。
【0011】
【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では第1の手段として、一端部に回転体が設けられた操作軸と、この操作軸を回転可能に保持する軸受けと、この軸受けに係合される駆動体と、この駆動体を前記回転体側に付勢するばね部材とを備え、前記軸受けにはガイド部が形成され、前記駆動体は前記ガイド部とスプライン結合により前記操作軸の軸心方向へのみ移動可能なように係合され、前記回転体と前記駆動体の対向する各々の面には、互いに噛み合う複数個の凹凸部が形成されていることを特徴とする。
【0012】
また、第2の手段として、前記駆動体を前記回転体側に付勢するばね部材は、板ばねで形成されていることを特徴とする。
【0013】
また、第3の手段として、前記軸受けは、亜鉛ダイキャストで一体に形成され、前記ばね部材は、前記軸受けに固着されていることを特徴とする。
【0014】
【発明の実施の形態】
以下、本発明の1実施例を図1乃至図12に示す。図1は本発明の回転型電気部品である可変抵抗器を示す断面図、図2は本発明の回転型電気部品の軸受けの正面図、図3は同じく軸受けの右側面図、図4は同じく軸受けの左側面図、図5は本発明の回転型電気部品の操作軸の正面図、図6は同じく操作軸の右側面図、図7は同じく操作軸の左側面図、図8は本発明の回転型電気部品の駆動体の正面図、図9は同じく駆動体の右側面図、図10は同じく駆動体の左側面図、図11は本発明の回転型電気部品のばね部材の正面図、図12は同じくばね部材の側面図である。
【0015】
図1乃至図4において、軸受け1は、亜鉛ダイキャストで略円筒状に一体成形加工することにより形成されている。この軸受け1には、円筒状の軸部1aと、この軸部1aの側面の一端から各々反対方向に延設された、一対の取付部1bが設けられており、前記軸部1aには後述する操作軸が挿入される貫通孔1cが形成されている。また、前記軸部1aの基端面1d側には、前記貫通孔1cの周りに沿って円弧状に突出した、ガイド部1eが形成されており、このガイド部1eには十字の位置に4箇所、係止用凹部1fが設けられたものとなっている。前記ガイド部1eの外側には、前記貫通孔1cを挟んで対向する位置に、後述するばね部材が固着されるボス1gが一対形成されている。また、前記一対の取付部1bの一方には、後述する操作軸の回転体のストッパー部が当接する、係止部1hが形成されたものとなっている。
【0016】
図1、及び図5乃至図7において、操作軸2は、合成樹脂などの絶縁材からなり、略円柱状に形成されている。この操作軸2の先端部には、前記軸受け1の貫通孔1cに貫通され、外方へ突出される操作部2aが設けられており、また、後端部には、略円盤状の回転体2bが形成されている。この回転体2bの下面側中央には前記操作部2aと同心軸上に延設され、前記操作軸より小径とされた嵌合軸2cが形成されており、この嵌合軸2cの外側には複数個の突起2dが設けられ、この突起2dには、導電材料である金属板などからなる摺動子3が固着されている。前記回転体2bの外周部には、略半周に渡って円弧状壁2eが形成され、この円弧状壁2eの両端部が、前記操作部2aを回動させた時に、前記軸受け1の係止部1hに当接して前記操作軸2の回動を規制するストッパー部2fとなるように形成されている。また、前記回転体2bの上面側には、同心円上に連続した複数個の山部と谷部からなる凹凸部2gが形成されたものとなっている。尚、図1における前記操作軸2の中空部2hは、絶縁材を成形加工する場合のヒケ、変形などを防止するための肉逃げ部分を示している。
【0017】
図1、及び図8乃至図10において、駆動体4は、合成樹脂などの絶縁材からなり、略リング状に形成されている。この駆動体4の内周部には、中心部に向けて十字の位置に4箇所、係止用凸部4aが形成されており、この係止用凸部4aの内、一方の対向する2箇所には、さらに直交方向へ延びる直立片4bが設けられ、この直立片4bが後述するばね部材の内周に係合されて、前記軸受け1に形成された前記ガイド部1eに取り付けられるようになっている。また、前記駆動体4の、前記直立片4bが形成された面と反対側の面には、同心円上に連続した複数個の山部と谷部からなる凹凸部4cが形成されている。
【0018】
図1、及び図11、図12において、ばね部材5は、リン青銅板、又はステンレス鋼板などのばね性のある金属板からなり、略リング状に形成されている。このばね部材5には、一対の取付孔5aを有する取付片5bが形成され、この各々の取付片5bを結ぶ線を中心として、同一方向にやや起立した状態に折り曲げられて、ばね片5cが形成されたものとなっている。尚、図12で、点線で示すのは、前記ばね部材5が本発明の電気部品に組み込まれた時の状態を示している。
【0019】
図1において、抵抗基板6はフェノール樹脂などの絶縁基板からなり、その一面に、カーボンインクなどを印刷によって形成した円弧状の抵抗体(図示せず)が設けられている。また、この抵抗体の両端部には、ハトメ7によって端子8が固着されている。尚、本実施例では上述したように抵抗体が設けられた抵抗基板6で説明したが、本発明はこれに限定されるものではなく、固定接点などを配設したスイッチ基板であっても良いのはもちろんである。
【0020】
ハウジング9は、前記抵抗基板6及び端子8などを内部に保持するためのもので、合成樹脂などの絶縁材からなり、成形加工により一体的に形成されている。このハウジング9の中央には前記抵抗基板6と共に貫通された嵌合孔9aが設けられており、また、前記ハウジング9の前面部には、電気部品の蓋を構成する、フレーム10を取り付けるための取付用ボス(図示せず)が形成されたものとなっている。
【0021】
次に、上述した本発明の回転型電気部品である可変抵抗器を組み立てる場合には、まず、前記操作軸2の回転体2bの下面側に設けられた突起2dに、前記摺動子3を熱カシメなどによって固着する。
【0022】
次に、前記軸受け1の軸部1aの基端面1d側に形成されたボス1gに、前記ばね部材5の取付片5bに設けられた取付孔5aを挿入し、熱カシメなどにより固着する。 次に、前記軸受け1の軸部1aの基端面1d側に形成されたガイド部1eの係止用凹部1fに、前記駆動体4の係止用凸部4aを嵌入させることにより、前記軸受け1に前記駆動体4を取り付ける。この時、前記係止用凸部4aに設けられた直立片4bが前記ばね部材5の内周に係合されることにより、前記駆動体4は前記軸受け1に形成された前記ガイド部1eに確実に取り付けられるようになっている。
【0023】
次に、前記軸受け1の貫通孔1cに、前記操作軸2の操作部2aを挿通し、前記駆動体4に形成された複数個の山部と谷部からなる凹凸部4cと、前記操作軸2の回転体2bに形成された複数個の山部と谷部からなる凹凸部2gとを互いに噛み合わせた状態で、前記操作軸2の後端部の嵌合軸2cを前記ハウジング9の中央の嵌合孔9aに挿入し、前記軸受け1と前記ハウジング9を重ね合わせる。次に、前記操作軸2の先端側から、フレーム10を挿入し、前記軸受け1と前記ハウジング9を重ね合わせた状態で、前記フレーム10が、ハウジング9の取付用ボス(図示せず)に係合、嵌着されることで、電気部品の組立が完了する。
【0024】
上述した、本発明の回転型電気部品の構成においては、前記駆動体4は、十字の位置に形成された係止用凸部4aによって、前記軸受け1のガイド部1eにスプライン結合されており、このスプライン結合により、前記駆動体4は、前記軸受け1に貫通される操作軸2の軸心方向にのみ移動可能なように、前記軸受け1のガイド部1eに係合されている。また、前記軸受け1のガイド部1eは、軸受け1に設けられた前記操作軸2の貫通孔1cの外側に形成されていることから、前記ガイド部1eの径を前記操作軸2の軸径よりも大きくすることができるため、スプライン結合による係合ガタを小さくすることが可能となる。
【0025】
また、前記駆動体4を付勢するばね部材5は、板ばねで形成され、この板ばね5が前記操作軸2の回転体2b側にではなく、前記軸受け1側に固着されていることから、前記板ばね5は電気部品の中では回転することがないため、回転スペースを大きくとる必要がなく、また、コイルばねと違って自由長を長くする必要がないため、製品の小型化、薄型化が可能となる。また、板ばね5の荷重が直接回転体2bに加わらないことから、回転体2bが変形し、摺動子3に悪影響を及ぼすということもなくなる。更には、前記ばね部材5、駆動体4、操作軸2は、一方向からの組み込みが可能であり、作業効率を高めることができる。
【0026】
【発明の効果】
以上説明したように、本発明の回転型電気部品は、軸受けには駆動体と、この駆動体を回転体側に付勢するばね部材とが係合され、前記駆動体は前記軸受けとスプライン結合により操作軸の軸心方向へのみ移動可能なように係合され、前記回転体と前記駆動体の対向する各々の面には、互いに噛み合う複数個の凹凸部が形成されていることから、前記軸受けのガイド部の径を前記操作軸の軸径よりも大きくすることができるため、軸受けと駆動体とのスプライン結合による係合ガタを小さくすることが可能となり、操作時のフィーリングを向上することができる。
【0027】
また、駆動体を回転体側に付勢するばね部材は、板ばねで形成されているため、コイルばねと違って自由長を長くする必要がないため、製品の小型化、薄型化が可能となる。
【0028】
また、軸受けは、亜鉛ダイキャストで一体に形成され、ばね部材は、軸受けに固着されているため、板ばねは回転型電気部品の中では回転することがなく、回転スペースを大きくとる必要がないため、製品の小型化、薄型化が可能となる。また、板ばねの荷重が直接回転体に加わらないことから、回転体が変形し摺動子に悪影響を及ぼすことを防止できる。
【図面の簡単な説明】
【図1】本発明の回転型電気部品である可変抵抗器を示す断面図である。
【図2】本発明の回転型電気部品の軸受けを示す正面図である。
【図3】本発明の回転型電気部品の軸受けを示す右側面図である。
【図4】本発明の回転型電気部品の軸受けを示す左側面図である。
【図5】本発明の回転型電気部品の操作軸を示す正面図である。
【図6】本発明の回転型電気部品の操作軸を示す右側面図である。
【図7】本発明の回転型電気部品の操作軸を示す左側面図である。
【図8】本発明の回転型電気部品の駆動体を示す正面図である。
【図9】本発明の回転型電気部品の駆動体を示す右側面図である。
【図10】本発明の回転型電気部品の駆動体を示す左側面図である。
【図11】本発明の回転型電気部品のばね部材を示す正面図である。
【図12】本発明の回転型電気部品のばね部材を示す側面図である。
【図13】従来の回転型電気部品である可変抵抗器を示す断面図である。
【符号の説明】
1 軸受け
1a 軸部
1b 取付部
1c 貫通孔
1d 基端面
1e ガイド部
1f 係止用凹部
1g ボス
1h 係止部
2 操作軸
2a 操作部
2b 回転体
2c 嵌合軸
2d 突起
2e 円弧状壁
2f ストッパー部
2g 凹凸部
3 摺動子
4 駆動体
4a 係止用凸部
4b 直立片
4c 凹凸部
5 ばね部材
5a 取付孔
5b 取付片
5c ばね片
6 抵抗基板
7 ハトメ
8 端子
9 ハウジング
9a 嵌合孔
10 フレーム
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to the structure of a rotating part of a rotary electric component such as a variable resistor or a switch, and more particularly to a click mechanism generated during a rotating operation.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. H10-70015 discloses a click mechanism of a conventional rotary electric component, for example, a variable resistor. FIG. 13 shows a click mechanism of the conventional variable resistor. FIG. 13 is a cross-sectional view showing a click mechanism of the variable resistor. In the figure, a bearing 21 is formed in an approximately cylindrical shape with an insulating material such as a synthetic resin, and the bearing 21 has a shaft portion 21a and a shaft portion 21a. A through hole 21b formed in the shaft portion 21a and an uneven portion 21c formed of a plurality of peaks and valleys formed coaxially in an umbrella shape and formed on the inner peripheral surface at an inclination angle of 45 degrees are provided. ing.
[0003]
The operating shaft 22 is formed in an approximately cylindrical shape with an insulating material such as a synthetic resin, and has an operating portion 22a that penetrates a through hole 21b of the bearing 21 and protrudes outward, and a rear end of the operating portion 22a. The portion is provided with a substantially disk-shaped rotating body 22b. A slider 23 is fixed to the lower surface of the rotating body 22b, and a coil spring described later is mounted on a base 22c connected to the operating portion 22a on the upper surface. Further, a protrusion 22d arranged in a cross shape is provided on the base 22c, and a driving body to be described later is attached to the protrusion 22d by spline coupling.
[0004]
The driving body 24 is formed in an approximately frustoconical shape using an insulating material such as a synthetic resin, and is spline-coupled to a central portion of the driving body 24 at a projection 22 d provided on a base 22 c of the operation shaft 22. , A cross-shaped through hole 24a is provided. Further, the truncated cone-shaped inclined portion of the driving body 24 is formed to have a 45-degree inclination, and a plurality of bevel gear-shaped uneven portions 24b are formed. Further, a circular hole 24c is provided which is connected to the cross-shaped through hole 24a and accommodates a coil spring described later.
[0005]
The coil spring 25 is made of a piano wire and urges the bevel gear-shaped uneven portion 24b of the driving body 24 toward the uneven portion 21c of the bearing 21.
[0006]
Next, the operation of the variable resistor will be described. When the operation shaft 22 is rotated, the cross-shaped projection 22d of the operation shaft 22 is engaged with the cross-shaped through hole 24a of the driving body 24. Is rotated together with the operation shaft 22. At this time, since the uneven portion 24b of the driving body 24 is urged by the coil spring 25 to the uneven portion 21c of the bearing 21, the uneven portion 24b crosses the mutual peak and valley of the uneven portion 24b, 21c. At this time, a click feeling can be obtained.
[0007]
[Problems to be solved by the invention]
However, in the above-described conventional click mechanism of the variable resistor, the concave and convex portions forming the click mechanism are formed on the inner peripheral surface of the bearing 21 and the inclined portion of the driving body 24. The through-hole 24a is spline-coupled to the cross-shaped protrusion 22d provided on the base 22c of the operation shaft 22, so that it is difficult to increase the diameter of the operation shaft 22 for reasons of parts dimensions. Since the diameter of the projection 22d must be small, the joint between the operation shaft 22 and the driving body 24 is loosened, and there is a problem that the feeling during operation is deteriorated.
[0008]
Further, since the coil spring 25 is mounted on the base 22 c of the operation shaft 22 and urges the driving body 24 engaged with the cross-shaped projection 22 d of the operation shaft 22 toward the bearing 21, There has been a problem that the length in the force direction is long and it is difficult to make the product thinner. In addition, since the coil spring 25 itself also rotates with the rotation of the rotating body 22b, it is necessary to secure a space in a rotation range, and there is a problem that it is difficult to reduce the size of the product.
[0009]
In addition, the end turn portion of the coil spring 25 is in direct contact with the rotating body 22b provided at the rear end of the operation shaft 22, and a load is applied. Since it does not slide normally, there is a problem that the thickness of the rotating body 22b must be increased.
[0010]
Therefore, in the present invention, it is possible to solve the above-mentioned problem, to reduce the occurrence of backlash during operation between the member having the concave and convex portions forming the click mechanism and the operation shaft, and It is an object of the present invention to provide a click mechanism for a rotary electric component such as a variable resistor, which can reduce the size and thickness of a product without being affected by a spring member for urging the rotary electric component.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, in the present invention, as a first means, an operating shaft having a rotating body provided at one end, a bearing rotatably holding the operating shaft, and a driving body engaged with the bearing And a spring member for urging the driving body toward the rotating body, a guide portion is formed on the bearing, and the driving body moves only in the axial direction of the operation shaft by spline coupling with the guide portion. A plurality of concavo-convex portions, which are engaged as much as possible and mesh with each other, are formed on opposing surfaces of the rotating body and the driving body.
[0012]
As a second means, a spring member for urging the driving body toward the rotating body is formed of a leaf spring.
[0013]
As a third means, the bearing is formed integrally by zinc die-casting, and the spring member is fixed to the bearing.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 to FIG. 12 show one embodiment of the present invention. FIG. 1 is a sectional view showing a variable resistor which is a rotary electric component of the present invention, FIG. 2 is a front view of a bearing of the rotary electric component of the present invention, FIG. 3 is a right side view of the bearing, and FIG. FIG. 5 is a front view of the operating shaft of the rotary electric component of the present invention, FIG. 6 is a right side view of the operating shaft, FIG. 7 is a left side view of the operating shaft, and FIG. 9 is a right side view of the driving body, FIG. 10 is a left side view of the same driving body, and FIG. 11 is a front view of a spring member of the rotating electric part of the present invention. FIG. 12 is a side view of the spring member.
[0015]
1 to 4, the bearing 1 is formed by integrally forming a substantially cylindrical shape by zinc die casting. The bearing 1 is provided with a cylindrical shaft portion 1a and a pair of mounting portions 1b extending in opposite directions from one end of a side surface of the shaft portion 1a. The shaft portion 1a is described later. A through hole 1c into which an operating shaft to be inserted is inserted is formed. On the base end face 1d side of the shaft portion 1a, there are formed guide portions 1e that protrude in an arc shape around the through hole 1c. The guide portion 1e has four positions at cross positions. , And a locking recess 1f is provided. A pair of bosses 1g to which a spring member to be described later is fixed are formed at positions facing each other across the through hole 1c outside the guide portion 1e. In addition, a locking portion 1h is formed on one of the pair of mounting portions 1b, with which a stopper portion of a rotating body of the operation shaft described later abuts.
[0016]
1 and FIGS. 5 to 7, the operation shaft 2 is made of an insulating material such as a synthetic resin and is formed in a substantially columnar shape. An operating portion 2a penetrating through the through hole 1c of the bearing 1 and protruding outward is provided at a front end portion of the operating shaft 2, and a substantially disk-shaped rotating body is provided at a rear end portion. 2b is formed. A fitting shaft 2c extending coaxially with the operating portion 2a and having a smaller diameter than the operating shaft is formed at the center of the lower surface side of the rotating body 2b. A plurality of projections 2d are provided, and a slider 3 made of a conductive material such as a metal plate is fixed to the projections 2d. An arc-shaped wall 2e is formed on the outer periphery of the rotating body 2b over substantially a half circumference, and both ends of the arc-shaped wall 2e lock the bearing 1 when the operation unit 2a is rotated. The stopper 2f is formed so as to be in contact with the portion 1h to restrict the rotation of the operation shaft 2. On the upper surface side of the rotator 2b, an uneven portion 2g formed of a plurality of peaks and valleys continuous on a concentric circle is formed. In addition, the hollow portion 2h of the operation shaft 2 in FIG. 1 indicates a flesh relief portion for preventing sink marks, deformation, and the like in forming an insulating material.
[0017]
1 and 8 to 10, the driving body 4 is made of an insulating material such as a synthetic resin and is formed in a substantially ring shape. On the inner peripheral portion of the driving body 4, four locking projections 4 a are formed at a cross position toward the center, and one of the two locking projections 4 a is opposed to each other. An upright piece 4b extending further in the orthogonal direction is provided at the location, and the upright piece 4b is engaged with the inner periphery of a spring member described later so that the upright piece 4b is attached to the guide portion 1e formed on the bearing 1. Has become. On the surface of the driving body 4 opposite to the surface on which the upright pieces 4b are formed, an uneven portion 4c formed of a plurality of peaks and valleys continuous on a concentric circle is formed.
[0018]
1, FIG. 11, and FIG. 12, the spring member 5 is formed of a metal plate having a spring property such as a phosphor bronze plate or a stainless steel plate, and is formed in a substantially ring shape. The spring member 5 is formed with a mounting piece 5b having a pair of mounting holes 5a. The spring piece 5c is bent slightly upright in the same direction about a line connecting the mounting pieces 5b to form a spring piece 5c. It has been formed. In FIG. 12, the dotted line shows the state when the spring member 5 is incorporated in the electric component of the present invention.
[0019]
In FIG. 1, a resistor substrate 6 is made of an insulating substrate such as a phenol resin, and has an arc-shaped resistor (not shown) formed by printing carbon ink or the like on one surface thereof. Terminals 8 are fixed to both ends of the resistor by eyelets 7. Although the present embodiment has been described with reference to the resistor board 6 provided with the resistor as described above, the present invention is not limited to this, and may be a switch board provided with fixed contacts and the like. Of course.
[0020]
The housing 9 is for holding the resistance board 6 and the terminals 8 and the like inside, and is made of an insulating material such as a synthetic resin, and is integrally formed by molding. In the center of the housing 9, there is provided a fitting hole 9a which penetrates with the resistance board 6, and a front part of the housing 9 for attaching a frame 10 constituting a lid of an electric component. A mounting boss (not shown) is formed.
[0021]
Next, when assembling the above-described variable resistor, which is a rotary electric component of the present invention, first, the slider 3 is attached to the projection 2d provided on the lower surface side of the rotating body 2b of the operating shaft 2. It is fixed by heat caulking or the like.
[0022]
Next, a mounting hole 5a provided in a mounting piece 5b of the spring member 5 is inserted into a boss 1g formed on the base end face 1d side of the shaft portion 1a of the bearing 1, and fixed by heat caulking or the like. Next, the engaging protrusion 4a of the driving body 4 is fitted into the engaging concave portion 1f of the guide portion 1e formed on the base end surface 1d side of the shaft portion 1a of the bearing 1, thereby obtaining the bearing 1 The driving body 4 is attached to the above. At this time, the upright piece 4b provided on the locking projection 4a is engaged with the inner periphery of the spring member 5, so that the driving body 4 is connected to the guide portion 1e formed on the bearing 1. It is designed to be securely attached.
[0023]
Next, the operating portion 2a of the operating shaft 2 is inserted into the through hole 1c of the bearing 1, and the uneven portion 4c formed of a plurality of peaks and valleys formed on the driving body 4; In a state in which a plurality of peaks and valleys 2g formed on the rotating body 2b are engaged with each other, the fitting shaft 2c at the rear end of the operating shaft 2 is moved to the center of the housing 9. The bearing 1 and the housing 9 are overlapped with each other. Next, a frame 10 is inserted from the distal end side of the operation shaft 2, and the frame 10 is engaged with a mounting boss (not shown) of the housing 9 in a state where the bearing 1 and the housing 9 are overlapped. In this case, the fitting of the electric component is completed by being fitted.
[0024]
In the above-described configuration of the rotary electric component of the present invention, the driving body 4 is spline-coupled to the guide portion 1e of the bearing 1 by the locking projection 4a formed at the cross position. By this spline connection, the driving body 4 is engaged with the guide portion 1e of the bearing 1 so as to be movable only in the axial direction of the operation shaft 2 penetrated by the bearing 1. Since the guide portion 1e of the bearing 1 is formed outside the through hole 1c of the operation shaft 2 provided in the bearing 1, the diameter of the guide portion 1e is set to be smaller than the diameter of the operation shaft 2. Therefore, the engagement play due to the spline connection can be reduced.
[0025]
The spring member 5 for urging the driving body 4 is formed of a leaf spring, and the leaf spring 5 is fixed not to the rotating body 2b of the operating shaft 2 but to the bearing 1 side. Since the leaf spring 5 does not rotate in the electric parts, it is not necessary to take a large rotating space, and unlike the coil spring, it is not necessary to increase the free length. Is possible. Further, since the load of the leaf spring 5 is not directly applied to the rotating body 2b, the rotating body 2b is not deformed and does not adversely affect the slider 3. Further, the spring member 5, the driving body 4, and the operation shaft 2 can be incorporated from one direction, so that work efficiency can be improved.
[0026]
【The invention's effect】
As described above, in the rotary electric component of the present invention, the driving body and the spring member for urging the driving body toward the rotating body are engaged with the bearing, and the driving body is spline-coupled to the bearing. The bearing is engaged so as to be movable only in the axial direction of the operation shaft, and the rotating body and the driving body are formed with a plurality of concave and convex portions that mesh with each other on opposing surfaces. Since the diameter of the guide portion can be made larger than the shaft diameter of the operation shaft, it is possible to reduce the engagement play due to the spline connection between the bearing and the driving body, and to improve the feeling during operation. Can be.
[0027]
Further, since the spring member for urging the driving body toward the rotating body is formed of a leaf spring, unlike the coil spring, it is not necessary to increase the free length, so that the product can be reduced in size and thickness. .
[0028]
Further, the bearing is integrally formed by zinc die-casting, and the spring member is fixed to the bearing. Therefore, the leaf spring does not rotate in the rotary electric component, and there is no need to take a large rotating space. Therefore, the product can be reduced in size and thickness. Further, since the load of the leaf spring is not directly applied to the rotating body, it is possible to prevent the rotating body from being deformed and adversely affecting the slider.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a variable resistor that is a rotary electric component of the present invention.
FIG. 2 is a front view showing a bearing of the rotary electric component of the present invention.
FIG. 3 is a right side view showing a bearing of the rotary electric component of the present invention.
FIG. 4 is a left side view showing a bearing of the rotary electric component of the present invention.
FIG. 5 is a front view showing an operation shaft of the rotary electric component of the present invention.
FIG. 6 is a right side view showing an operation shaft of the rotary electric component of the present invention.
FIG. 7 is a left side view showing an operation shaft of the rotary electric component of the present invention.
FIG. 8 is a front view showing a driving body of the rotary electric component of the present invention.
FIG. 9 is a right side view showing a driving body of the rotary electric component of the present invention.
FIG. 10 is a left side view showing a driving body of the rotary electric component of the present invention.
FIG. 11 is a front view showing a spring member of the rotary electric component of the present invention.
FIG. 12 is a side view showing a spring member of the rotary electric component of the present invention.
FIG. 13 is a sectional view showing a variable resistor which is a conventional rotary electric component.
[Explanation of symbols]
Reference Signs List 1 bearing 1a shaft portion 1b mounting portion 1c through hole 1d base end surface 1e guide portion 1f locking concave portion 1g boss 1h locking portion 2 operating shaft 2a operating portion 2b rotating body 2c fitting shaft 2d protrusion 2e arc-shaped wall 2f stopper portion 2g Uneven part 3 Slider 4 Driver 4a Locking projection 4b Upright piece 4c Uneven part 5 Spring member 5a Mounting hole 5b Mounting piece 5c Spring piece 6 Resistance board 7 Eyelet 8 Terminal 9 Housing 9a Fitting hole 10 Frame

Claims (3)

一端部に回転体が設けられた操作軸と、この操作軸を回転可能に保持する軸受けと、この軸受けに係合される駆動体と、この駆動体を前記回転体側に付勢するばね部材とを備え、前記軸受けにはガイド部が形成され、前記駆動体は前記ガイド部とスプライン結合により前記操作軸の軸心方向へのみ移動可能なように係合され、前記回転体と前記駆動体の対向する各々の面には、互いに噛み合う複数個の凹凸部が形成されていることを特徴とする回転型電気部品。An operating shaft provided with a rotating body at one end, a bearing rotatably holding the operating shaft, a driving body engaged with the bearing, and a spring member for urging the driving body toward the rotating body; A guide portion is formed on the bearing, and the driving body is engaged with the guide portion so as to be movable only in the axial direction of the operating shaft by spline coupling, and the driving body and the driving body are A rotating electric component, wherein a plurality of concave and convex portions that mesh with each other are formed on each of the opposing surfaces. 前記駆動体を前記回転体側に付勢するばね部材は、板ばねで形成されていることを特徴とする請求項1記載の回転型電気部品。The rotary electric component according to claim 1, wherein the spring member for urging the driving body toward the rotating body is formed of a leaf spring. 前記軸受けは、亜鉛ダイキャストで一体に形成され、前記ばね部材は、前記軸受けに固着されていることを特徴とする請求項1、又は2記載の回転型電気部品。The rotary electric component according to claim 1, wherein the bearing is integrally formed by zinc die casting, and the spring member is fixed to the bearing.
JP07830099A 1999-03-23 1999-03-23 Rotating electrical parts Expired - Fee Related JP3549431B2 (en)

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JP2005339821A (en) * 2004-05-24 2005-12-08 Alps Electric Co Ltd Rotary electrical component

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