JPH023617Y2

JPH023617Y2 -

Info

Publication number: JPH023617Y2
Application number: JP18206883U
Authority: JP
Priority date: 1983-11-28
Filing date: 1983-11-28
Publication date: 1990-01-29
Also published as: JPS6090826U

Description

【考案の詳細な説明】〔考案の利用分野〕本考案はセラミツクを誘電体として用いたセラ
ミツクバリコンに関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a ceramic variable capacitor using ceramic as a dielectric.

[Background of the idea]

第１図〜第３図は従来例を示し、第１図はセラ
ミツクバリコン本体の側断面図、第２図はロータ
の平面図、第３図はステータの平面図である。 1 to 3 show a conventional example, in which FIG. 1 is a side sectional view of the ceramic variable capacitor main body, FIG. 2 is a plan view of the rotor, and FIG. 3 is a plan view of the stator.

図面において１は絶縁物よりなる前側枠体、２
は同じく絶縁物よりなる後側枠体で、前側枠体１
と後側枠体２とで筐体Ａを構成している。３は導
体よりなる略円形をなすロータ、４は該ロータ３
の中心穴５に圧入された回転軸、６はロータ３の
一面に形成された３ケ月状の外側ロータ電極、７
は該外側ロータ電極６と同心で且つ反対側に形成
された３ケ月状の内側ロータ電極、８はセラミツ
クよりなり、前記ロータ３と略同形の円形の誘電
体で、該誘電体８の一面には、前記外側ロータ電
極６に対応して設けられた略同形の３ケ月状の外
側ステータ電極９と、前記内側ロータ電極に対応
して設けられた略同形の３ケ月状の内側ステータ
電極１０が設けられている。１１は誘電体８を保
持する基板、１２は外側ロータ電極６と略同幅の
ゴム等よりなる環状の弾性体、１３，１３′は内、
外のステータ電極と電気的な導通を保つて、前側
枠体１と後側枠体２間に挟持されるステータ端
子、１４は後側枠体２の底面に装着され、後側枠
体２から外方に突出するアースリードである。 In the drawing, 1 is a front frame made of an insulator, 2
is the rear frame body also made of insulating material, and the front frame body 1
and the rear frame 2 constitute a housing A. 3 is a substantially circular rotor made of a conductor; 4 is the rotor 3;
6 is a three-moon-shaped outer rotor electrode formed on one surface of the rotor 3; 7 is a rotating shaft press-fitted into the center hole 5;
is a three-moon-shaped inner rotor electrode formed concentrically with and on the opposite side of the outer rotor electrode 6; 8 is a circular dielectric made of ceramic and has approximately the same shape as the rotor 3; A three-moon shaped outer stator electrode 9 of substantially the same shape provided corresponding to the outer rotor electrode 6 and a three-moon shaped inner stator electrode 10 of substantially the same shape provided corresponding to the inner rotor electrode are provided. It is provided. 11 is a substrate holding the dielectric 8; 12 is an annular elastic body made of rubber or the like having approximately the same width as the outer rotor electrode 6; 13, 13' are inner,
The stator terminal 14, which is sandwiched between the front frame 1 and the rear frame 2 while maintaining electrical continuity with the outer stator electrode, is attached to the bottom of the rear frame 2 and is connected to the rear frame 2. This is a ground lead that protrudes outward.

次に第１図によつてバリコン本体の組立方の一
例を説明すると、予めアースリード１４を装着し
た後側枠体２上に弾性体１２を載置し、その上に
ステータ端子１３，１３′を装着した基板１１を
回転不能に載置し、その上に誘電体８を内、外側
ステータ電極１０，９が下面に来るように載置
し、その上にロータ３を圧着した回転軸４を誘電
体８、基板１１を貫通して前記アースリードに当
接せしめ、最後にステータ端子１３，１３′を挟
持した状態で上、下側枠体１，２を嵌合して組立
てを終る。 Next, an example of how to assemble the variable capacitor main body will be explained with reference to FIG. A substrate 11 equipped with a rotor 3 is placed in a non-rotatable manner, and a dielectric 8 is placed on it so that the inner and outer stator electrodes 10 and 9 are on the bottom surface, and a rotating shaft 4 with a rotor 3 crimped thereon. The dielectric 8 and the substrate 11 are penetrated and brought into contact with the ground lead, and finally, the upper and lower frames 1 and 2 are fitted with the stator terminals 13 and 13' sandwiched between them to complete the assembly.

かくの如くに組立てられたセラミツクバリコン
は、弾性体１２によつて基板１１及び弾性体８を
ロータ３方向に押圧し、内、外側のロータ電極
７，６は誘電体８を介して内、外側のステータ電
極７，６と対向し、回転軸４の回転によつてロー
タ３が回転し、内、外側のロータ電極７，６は対
応する内、外側のステータ電極１０，９との対向
面積を変えて、ステータ端子１３′とアースリー
ド１４から外側ロータ電極６と外側のステータ電
極９間で得られた容量値が導出され、端子１３と
アースリード１４から内側ロータ電極７と内側ス
テータ電極１０間で得られた容量値が導出され
る。 In the thus assembled ceramic variable capacitor, the elastic body 12 presses the substrate 11 and the elastic body 8 in the direction of the rotor 3, and the inner and outer rotor electrodes 7 and 6 are connected to the inner and outer rotor electrodes via the dielectric body 8. The rotor 3 is rotated by the rotation of the rotating shaft 4, and the inner and outer rotor electrodes 7 and 6 have opposing areas with the corresponding inner and outer stator electrodes 10 and 9. Alternatively, the capacitance value obtained between the outer rotor electrode 6 and the outer stator electrode 9 is derived from the stator terminal 13' and the ground lead 14, and the capacitance value obtained between the inner rotor electrode 7 and the inner stator electrode 10 is derived from the terminal 13 and the ground lead 14. The capacitance value obtained is derived.

ところが、第１図に示す如く弾性体１２は基板
１１の外周部に接しており、基板１１上に誘電体
８が配置されており、ロータ３の外側ロータ電極
６は、弾性体１２の真上に位置する誘電体８の部
分に接しており、ロータ３の内側ロータ電極７
は、弾性体１２の内側部分を形成する中空部１６
の上に位置する誘電体８の部分に接していること
から、即ち、内側ロータ電極７が設けられている
側の弾性体１２の真上に位置する誘電体８の部分
とロータ３との間に空隙部１７が形成されている
ことから、内側ロータ電極７を支点として弾性体
１２の弾性力によつて基板１１及び誘電体８が曲
げられ、これ等の基板１１、誘電体８にソリを生
じ、このソリにより外側ロータ電極６、内側ロー
タ電極７誘電体８との密着性が損われ、安定した
容量値が得られないという欠点があつた。 However, as shown in FIG. 1, the elastic body 12 is in contact with the outer periphery of the substrate 11, the dielectric body 8 is arranged on the substrate 11, and the outer rotor electrode 6 of the rotor 3 is in contact with the outer circumference of the substrate 11. It is in contact with the part of the dielectric 8 located at the inner rotor electrode 7 of the rotor 3.
is the hollow part 16 forming the inner part of the elastic body 12
Because it is in contact with the portion of the dielectric 8 located above, that is, between the portion of the dielectric 8 located directly above the elastic body 12 on the side where the inner rotor electrode 7 is provided and the rotor 3. Since a gap 17 is formed in the inner rotor electrode 7, the substrate 11 and the dielectric 8 are bent by the elastic force of the elastic body 12 using the inner rotor electrode 7 as a fulcrum, and the substrate 11 and the dielectric 8 are warped. This warpage impairs the adhesion between the outer rotor electrode 6 and the inner rotor electrode 7 and the dielectric 8, resulting in a drawback that a stable capacitance value cannot be obtained.

[Purpose of invention]

本考案は上記従来の欠点を改良せんとするもの
であり、本考案の目的は、内、外側のロータ電極
と誘電体との密着性の良好なセラミツクバリコン
を提供せんとするものである。 The present invention aims to improve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a ceramic variable capacitor with good adhesion between the inner and outer rotor electrodes and the dielectric material.

[Example of idea]

第４図〜第５図は本考案の一実施例を示し、第
４図はセラミツクバリコン本体の側断面図、第５
図はロータの平面図である。なお、第１図〜第３
図に示す従来例と同一部分は同一符号を付して詳
細な説明は省略する。 4 and 5 show one embodiment of the present invention, FIG. 4 is a side sectional view of the ceramic variable condenser body, and FIG.
The figure is a plan view of the rotor. In addition, Figures 1 to 3
The same parts as those in the conventional example shown in the figures are given the same reference numerals and detailed explanations will be omitted.

本考案の従来例との相異点は、第４，５図に示
す如く、環状弾性体１２の外径r₁を外側ロータ電
極９の内径r₂以上の大きさとし、弾性体１２の内
径r₃を内側ロータ電極７の外径r₄以下の大きさに
設定した点であり、その他の点は第１図〜第３図
の従来例と同じである。 The difference between the present invention and the conventional example is that, as shown in FIGS. 4 and 5, the outer diameter r ₁ of the annular elastic body 12 is larger than the inner diameter r ₂ of the outer rotor electrode 9, and the inner diameter r ₃ is set to be smaller than the outer diameter r ₄ of the inner rotor electrode 7, and other points are the same as the conventional example shown in FIGS. 1 to 3.

この場合は、ロータ３の外側ロータ電極６の一
部は、外側ロータ電極６側に位置する弾性体１２
の真上に位置する誘電体８部分に常時接してお
り、ロータ３の内側ロータ電極７の一部は、内側
ロータ電極７側に位置する弾性体１２の真上に位
置する誘電体８部分に常時接しているところか
ら、弾性体１２の圧接力が基板１１および誘電体
８を介してロータ３の外側ロータ電極６および内
側ロータ電極７に略均等に伝えられ、従つて基板
１１および誘電体８にソリを生じることがない。 In this case, a part of the outer rotor electrode 6 of the rotor 3 is connected to the elastic body 12 located on the outer rotor electrode 6 side.
, and a part of the inner rotor electrode 7 of the rotor 3 is in constant contact with the dielectric 8 portion located directly above the elastic body 12 located on the inner rotor electrode 7 side. Since they are in constant contact, the pressure contact force of the elastic body 12 is transmitted almost equally to the outer rotor electrode 6 and the inner rotor electrode 7 of the rotor 3 via the substrate 11 and the dielectric 8, so that the substrate 11 and the dielectric 8 No warping occurs.

[Effect of idea]

本考案によれば、環状弾性体の外径を外側ロー
タ電極の内径以上の大きさとし、環状弾性体の内
径を内側ロータ電極の外径以上の大きさに設定す
ることにより、弾性体の圧接力が基板および誘電
体を介してロータの外側ロータ電極および内側ロ
ータ電極に略均等に伝えられ、従つて基板および
誘電体にソリを生ずることがなく、従つて安定し
た容量値が得られるという効果を有する。 According to the present invention, the outer diameter of the annular elastic body is set to be larger than the inner diameter of the outer rotor electrode, and the inner diameter of the annular elastic body is set to be larger than the outer diameter of the inner rotor electrode. is transmitted almost equally to the outer rotor electrode and the inner rotor electrode of the rotor via the substrate and dielectric, and therefore the substrate and dielectric do not warp, resulting in the effect that a stable capacitance value can be obtained. have

[Brief explanation of the drawing]

第１図〜第３図は従来例を示し、第１図はセラ
ミツクバリコン本体の側断面図、第２図はロータ
の平面図、第３図は誘電体の平面図、第４図及び
第５図は本考案の一実施例を示し、第４図はセラ
ミツクバリコン本体の側断面図、第５図はロータ
の平面図である。１……前側枠体、２……後側枠体、Ａ……筐
体、３……ロータ、４……回転軸、６……外側ロ
ータ電極、７……内側ロータ電極、８……誘電
体、９……外側ステータ電極、１０……内側ステ
ータ電極、１１……基板、１２……弾性体、１
３，１３′……ステータ端子、１４……アースリ
ード。 Figures 1 to 3 show conventional examples, where Figure 1 is a side sectional view of the ceramic variable capacitor body, Figure 2 is a plan view of the rotor, Figure 3 is a plan view of the dielectric, and Figures 4 and 5. The figures show an embodiment of the present invention, with FIG. 4 being a side sectional view of the ceramic variable capacitor body, and FIG. 5 being a plan view of the rotor. DESCRIPTION OF SYMBOLS 1... Front frame body, 2... Rear frame body, A... Housing, 3... Rotor, 4... Rotating shaft, 6... Outer rotor electrode, 7... Inner rotor electrode, 8... Dielectric Body, 9... Outer stator electrode, 10... Inner stator electrode, 11... Substrate, 12... Elastic body, 1
3, 13'...Stator terminal, 14...Earth lead.

Claims

[Scope of utility model registration request]

A rotor provided with a tri-moon-shaped outer rotor electrode, a tri-moon-shaped inner rotor electrode concentric with the outer rotor electrode and on the opposite side, and a tri-moon-shaped inner rotor electrode provided corresponding to the outer rotor electrode. A ceramic variable capacitor comprising: an outer stator electrode; a dielectric member provided with a three-moon-shaped inner stator electrode provided in correspondence with the inner rotor electrode; and an annular elastic member for press-contacting the dielectric member to the rotor. In,
A ceramic variable capacitor characterized in that the outer diameter of the elastic body is set to be larger than the inner diameter of the outer rotor electrode, and the inner diameter of the elastic body is set to be smaller than the outer diameter of the inner rotor electrode.