JPS62111405A - Variable inductor - Google Patents

Variable inductor

Info

Publication number
JPS62111405A
JPS62111405A JP25146085A JP25146085A JPS62111405A JP S62111405 A JPS62111405 A JP S62111405A JP 25146085 A JP25146085 A JP 25146085A JP 25146085 A JP25146085 A JP 25146085A JP S62111405 A JPS62111405 A JP S62111405A
Authority
JP
Japan
Prior art keywords
coil
wiring board
printed
inductance
guide
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
Application number
JP25146085A
Other languages
Japanese (ja)
Inventor
Shinji Nishi
西 信次
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 Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP25146085A priority Critical patent/JPS62111405A/en
Publication of JPS62111405A publication Critical patent/JPS62111405A/en
Pending legal-status Critical Current

Links

Landscapes

  • Coils Or Transformers For Communication (AREA)

Abstract

PURPOSE:To obtain a small-sized, thin variable inductor by allowing a permeability member to be slidably opposed to the coil formed in a printed-wiring board. CONSTITUTION:The copper foil 4 of a printed-wiring board 3 having copper foils on both surface thereof is etched, and a coil is formed which is spiralled between terminals 4a and 4a'. A guide 2 composed of molding resin is fixed to a printed-wiring board 3 by fitting with a positioning hole 5, and a ferrite core 1 is slided above the guide 2 to vary the distance between the coil formed in the printed-wiring board 3, thereby obtaining desired inductance. After adjustment, the guide 2 and the ferrite core 1 are fixed by wax, adhesive or the like, fixing the electrically adjusted inductance.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、小型、薄型の可変インダクタに関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a small and thin variable inductor.

従来の技術 従来の可変インダクタとしては、銅線をコイル状に巻き
、コイルのピッチを可変することにより希望のインダク
タンスを得るものや、銅線をコイル状に巻き、コイルの
中に透磁率大きい物質を近づけることにより希望のイン
ダクタンスを得るものが知られている。
Conventional technology Conventional variable inductors include those that obtain the desired inductance by winding copper wire into a coil and varying the pitch of the coil, and those that wind copper wire into a coil and using a material with high magnetic permeability inside the coil. It is known that a desired inductance can be obtained by bringing the

発明が解決しようとする問題点 しかし、従来の可変インダクタは、銅線をコイル状に巻
くためにコイルのインダクタンスは直径と巻数の2乗に
比例するので、小型化、薄型化には限界があった。そこ
で、印刷配線基板にエツチング等により小型、薄型のコ
イルが作れたが、インダクタンスを可変することが出来
なかった。
Problems to be Solved by the Invention However, in conventional variable inductors, since copper wire is wound into a coil, the inductance of the coil is proportional to the diameter and the square of the number of turns, so there is a limit to miniaturization and thinning. Ta. Therefore, a small and thin coil could be made by etching a printed wiring board, but it was not possible to change the inductance.

問題点を解決するための手段 本発明では、小型、薄型の可変コイルを得るために印刷
配線基板にエツチング等によりコイルを形成し、一方、
コイルに高透磁率の物質を近づけるとインダクタンスの
変化が得られることを利用して、上記小型コイルの上を
高透磁率の物質を平面的に移動する構造にし、面積的な
変化によりインダクタンスを可変するようにしたことを
特長とするものである。
Means for Solving the Problems In the present invention, in order to obtain a small and thin variable coil, a coil is formed on a printed wiring board by etching, etc.
Taking advantage of the fact that when a high magnetic permeability material is brought close to a coil, the inductance changes, a structure is created in which a high magnetic permeability material is moved in a plane over the small coil, and the inductance is varied by changing the area. The feature is that it is designed to do the following.

作  用 本発明の可変インダクタは、印刷配線基板に形成された
コイルに高透磁率の物質を平面的に移動するように近づ
け、透磁率が面積で変化し、コイルのインダクタンスが
大きくなり、よって、上記コイルと高透磁率の物質との
面積をコントロールすることにより、意のインダクタン
スを得ることが出来る。したがって、一般的な可変イン
ダクタンスがコイルの直径、コイルの巻数の2乗、透磁
率に比例するのに比べて小型化、薄型化を図ることがで
きる。
Function: The variable inductor of the present invention brings a material with high magnetic permeability close to a coil formed on a printed wiring board in a planar manner, so that the magnetic permeability changes with area and the inductance of the coil increases. A desired inductance can be obtained by controlling the area of the coil and the material with high magnetic permeability. Therefore, compared to a general variable inductance which is proportional to the diameter of the coil, the square of the number of turns of the coil, and the magnetic permeability, the device can be made smaller and thinner.

実施例 以下、図面にしたがって本発明の一実施例を説明する。Example An embodiment of the present invention will be described below with reference to the drawings.

第1図〜第3図は本発明の一実施例を示す。第1図〜第
3図において、3は両面銅箔の印刷配線基板で、銅箔4
をエツチングすることによりコイルを形成しである。つ
まり、端子4aおよび4a’間はうず巻状に銅箔をエツ
チングして形成し、コイルを作っている。印刷配線基板
3に成形樹脂よりなるガイド体2を位置決め孔6に合し
て固定し、このガイド体2の上を高透磁率部材としての
フェライトコア1をスライドさせ、印刷配線基板3に形
成されたコイルとの距離を変化させ、希望のインダクタ
スを得る。調整後はワックス又は接着剤等でガイド体2
とフェライトコア1を固定し、訓電されたインダクタン
スを固定する。
1 to 3 show an embodiment of the present invention. In Figures 1 to 3, 3 is a double-sided copper foil printed wiring board;
The coil is formed by etching. That is, the coil is formed by etching copper foil in a spiral shape between the terminals 4a and 4a'. A guide body 2 made of molded resin is fixed to the printed wiring board 3 by aligning it with the positioning hole 6, and a ferrite core 1, which is a high magnetic permeability member, is slid on the guide body 2. The desired inductance can be obtained by changing the distance to the coil. After adjustment, attach guide body 2 with wax or adhesive.
and the ferrite core 1 are fixed, and the trained inductance is fixed.

発明の効果 本発明は、印刷配線基板に形成したコイルに透磁率部材
をスライドさせるように対向させることにより、従来の
ものより小型、薄型の可変インダクタを実現出来、この
印刷配線基板にラジオ受信回路を組立てれば、従来より
スペースメリットのある高周波の共振回路を構成出来、
より小型のラジオ受信機を実現することが出来る。また
、印刷配線基板上にコイルが形成されているので、従来
のもののように半田付けする必要がなく、工数の削減、
およびコイルを巻く必要がないので、部品単価も下がり
、価格の低減にも効果的である。
Effects of the Invention The present invention makes it possible to realize a variable inductor that is smaller and thinner than conventional ones by slidingly opposing a magnetic permeability member to a coil formed on a printed wiring board, and a radio receiving circuit is installed on this printed wiring board. By assembling them, you can construct a high-frequency resonant circuit with more space advantages than before.
A more compact radio receiver can be realized. In addition, since the coil is formed on the printed wiring board, there is no need for soldering as with conventional products, reducing man-hours.
Also, since there is no need to wind a coil, the unit cost of parts is also reduced, which is effective in reducing costs.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の可変インダクタの一実施例を示す平面
図、第2図は第1図のa −a’断面図、第3図は同可
変インダクタに使用する印刷配線基板の平面図である0 1・・・・・・フェライトコア、2・・・・・・ガイド
体、3・・・・・・印刷配線基板、4・・・・・・銅箔
、6・・・・・・ガイドの位置決め孔。 代理人の氏名 弁理士 中 尾 敏 男 ほか1多方 
 1  図                    
      イーーーフz5件コア2−・−丁イl’f
L4薊h1tへi′l−ノ3−一−ヒjJl泌楳基仄
Fig. 1 is a plan view showing one embodiment of the variable inductor of the present invention, Fig. 2 is a sectional view taken along line a-a' in Fig. 1, and Fig. 3 is a plan view of a printed wiring board used in the variable inductor. 0 1... Ferrite core, 2... Guide body, 3... Printed wiring board, 4... Copper foil, 6... Guide positioning hole. Name of agent: Patent attorney Toshio Nakao and one other person
1 figure
E-F z 5 core 2-・-Ding l'f
I'l-ノ3-1-hijJl 斊楳基仄 to L4薊h1t

Claims (1)

【特許請求の範囲】[Claims] 印刷配線基板にエッチング等により形成したコイルと、
上記印刷配線基板に上記コイルをおおうように形成した
成形樹脂よりなるガイド体と、このガイド体に装着され
上記コイルとの対向面積を可変することにより上記コイ
ルのインダクタンスを可変する透磁率部材を備えたこと
を特徴とする可変インダクタ。
A coil formed by etching etc. on a printed wiring board,
A guide body made of molded resin formed on the printed wiring board so as to cover the coil, and a magnetic permeability member attached to the guide body to vary the inductance of the coil by varying the area facing the coil. A variable inductor characterized by:
JP25146085A 1985-11-08 1985-11-08 Variable inductor Pending JPS62111405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25146085A JPS62111405A (en) 1985-11-08 1985-11-08 Variable inductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25146085A JPS62111405A (en) 1985-11-08 1985-11-08 Variable inductor

Publications (1)

Publication Number Publication Date
JPS62111405A true JPS62111405A (en) 1987-05-22

Family

ID=17223148

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25146085A Pending JPS62111405A (en) 1985-11-08 1985-11-08 Variable inductor

Country Status (1)

Country Link
JP (1) JPS62111405A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010135699A (en) * 2008-12-08 2010-06-17 Sumida Corporation Variable inductor
JP5167372B2 (en) * 2008-12-10 2013-03-21 スミダコーポレーション株式会社 Coil parts
WO2014034044A1 (en) * 2012-08-31 2014-03-06 日清工業有限公司 Transformer and flash device
JP2014127528A (en) * 2012-12-25 2014-07-07 Sumida Corporation Variable coil element

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010135699A (en) * 2008-12-08 2010-06-17 Sumida Corporation Variable inductor
JP5167372B2 (en) * 2008-12-10 2013-03-21 スミダコーポレーション株式会社 Coil parts
WO2014034044A1 (en) * 2012-08-31 2014-03-06 日清工業有限公司 Transformer and flash device
JP2014049636A (en) * 2012-08-31 2014-03-17 Nissei Kogyo Yugenkoshi Transformer and flash device
US9460845B2 (en) 2012-08-31 2016-10-04 Nissin Industries Ltd. Transformer and strobe device
JP2014127528A (en) * 2012-12-25 2014-07-07 Sumida Corporation Variable coil element

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