JP3649502B2 - choke coil - Google Patents
choke coil Download PDFInfo
- Publication number
- JP3649502B2 JP3649502B2 JP03544296A JP3544296A JP3649502B2 JP 3649502 B2 JP3649502 B2 JP 3649502B2 JP 03544296 A JP03544296 A JP 03544296A JP 3544296 A JP3544296 A JP 3544296A JP 3649502 B2 JP3649502 B2 JP 3649502B2
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- JP
- Japan
- Prior art keywords
- base
- plate
- dielectric
- choke coil
- coil
- 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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- Waveguide Aerials (AREA)
- Details Of Aerials (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、車載ラジオ等の受信感度を向上させるために用いられるガラスアンテナ用のチョークコイルの構造に関する。
【０００２】
【従来の技術】
ガラスアンテナ用のチョークコイルは、高周波領域においてノイズを減衰させ、Ｓ／Ｎ比を良くし、車載ラジオ等の受信感度を向上させるものであり、Ｎｉ−Ｚｎ系の柱状の磁芯に導線を筒状に積層して巻回したコイルを樹脂製の固定台に設置し、該樹脂製の固定台に設けられた、ふたつの金属板に前記コイルの両端を半田付けによって接続した構造で、前記コイルの周波数特性のみで受信感度を向上させるものである。
【０００３】
【発明が解決しようとする課題】
前述のように、従来のガラスアンテナ用のチョークコイルは、Ｎｉ−Ｚｎ系の柱状の磁芯を用いたコイルの周波数特性により高周波領域のノイズを減衰させて、車載ラジオ等の受信感度を向上させるものであった。
【０００４】
しかし、前記コイルの周波数特性だけによるノイズの減衰量には限度があり、そのため、車載ラジオの受信感度を向上させることにも限界があった。
【０００５】
本発明の技術的課題は、上述の欠点を除去するために、従来に比べ、更にノイズの減衰量を多くし、かつ、組み立てが容易な構造のガラスアンテナ用のチョークコイルを提供することにある。
【０００６】
【課題を解決するための手段】
本発明の樹脂製の固定台に設けられた金属端子板と金属板との間に板状の誘電体を挿設し、磁芯が挿通したコイルと該板状の誘電体とが電気的に並列に接続される構造により、前記板状の誘電体によって、従来に比べ、高周波領域においてノイズの減衰量が多くなり、車載ラジオの受信感度を向上させるガラスアンテナ用のチョークコイルとなる。
【０００７】
即ち、本発明は、柱状の磁心に導線を筒状に積層して巻回したコイルを樹脂製の固定台に設置し、該樹脂製の固定台に設けられた金属端子板と金属板に前記コイルの巻線の両端を接続したチョークコイルにおいて、前記樹脂製の固定台は、前記金属端子板を挿通させる孔を有する凸部を有するベース部とベース補助部よりなり、前記凸部の位置の前記金属端子板と前記金属板との間に板状の誘電体を設け、かつ、前記ベース補助部の前記ベース部と対向する面に、前記誘電体を係合するための係合部を設けたことを特徴とするガラスアンテナ用チョークコイルである。
【０００９】
（作用）
本発明のガラスアンテナ用のチョークコイルは、ベース部とベース補助部とからなる樹脂製の固定台に設けられた金属端子板と金属板との間に板状の誘電体を設け、磁芯が挿通されているコイルと前記板状の誘電体が電気的に並列に接続された構造である。
【００１０】
前記板状の誘電体の共振周波数は、前記板状の誘電体の厚さによって決定される特性がある。従って、任意の周波数で共振させるには、厚さを変える必要がある。
【００１１】
そのため、前記板状の誘電体の厚さが変わっても、前記金属端子板と前記金属板に前記板状の誘電体が挿設が可能なように、前記ベース補助部に係合部を設けた構造となっている。
【００１２】
この構造によって、板状の誘電体の共振作用により、高周波領域において高インピーダンス素子となり、ノイズの減衰量が多く得られ、車載用のラジオ等のＳ／Ｎ比が良くなり、受信感度を向上させることができる。
【００１３】
【発明の実施の形態】
以下、図１、図２及び図３を用いて、発明の実施の形態を説明する。
【００１４】
図１は、本発明のガラスアンテナ用のチョークコイルの説明図であり、図１（ａ）は斜視図、図１（ｂ）は平面図である。図２は、本発明のガラスアンテナ用のチョークコイルのベース部３の斜視図である。図３は、本発明のガラスアンテナ用のチョークコイルのベース補助部４の斜視図である。
【００１５】
図１に示すように、本発明のガラスアンテナ用のチョークコイルは、銅線を筒状に積層し、巻回したコイル１にＮｉ−Ｚｎ系の円柱状の磁芯２を挿通させ、ベース部３及びベース補助部４よりなる樹脂製の固定台２０に設けられた、金属端子板５と金属板６にコイル１の両端を接続し、板状の誘電体７を金属端子板５と金属板６間に挿入した構造である。
【００１６】
又、図２に示すように、ベース部３は、前面に、金属端子板を挿通させるための孔１２を有した凸部８が形成され、中央には、ベース部３、金属板、及びベース補助部とを接続するねじを通すための貫通孔９が設けられている。
【００１７】
又、図３に示すように、ベース補助部４には、金属端子板と金属板の間に板状の誘電体を一定に密着させるための係合部１０が設けられ、更に、中央には、ベース補助部４、金属板、及びベース部とを接続するための孔１１が設けられている。
【００１８】
この構造により、板状の誘電体７の厚さに関係なく、金属端子板５と金属板６に板状の誘電体７を確実に挿設させることができ、更に、ベース部３、金属板６、及びベース補助部４とをねじによって固定することができる。
【００１９】
従って、板状の誘電体の共振作用により、高周波領域において、ガラスアンテナ用のチョークコイルは、高インピーダンス素子として機能するため、ノイズの減衰量が多く得られ、車載用のラジオ等のＳ／Ｎ比が良くなり、受信感度を向上させることができる。
【００２０】
【発明の効果】
以上のごとく、本発明によれば、板状の誘電体をコイルの端子間に配置し、樹脂製の固定台をベース部とベース補助部に分割し、ベース補助部に誘電体の係合部を設けた構造とすることにより、車載用のラジオ等のＳ／Ｎ比がよくなり、受信感度を向上することができると共に、組み立てが容易で、安価なチョークコイルを得ることができる。
【図面の簡単な説明】
【図１】本発明のガラスアンテナ用のチョークコイルを示す説明図。図１（ａ）は斜視図。図１（ｂ）は平面図。
【図２】本発明のガラスアンテナ用のチョークコイルのベース部の斜視図。
【図３】本発明のガラスアンテナ用のチョークコイルのベース補助部の斜視図。
【符号の説明】
１ コイル
２ （円柱状の）磁芯
３ ベース部
４ ベース補助部
５ 金属端子板
６ 金属板
７ （板状の）誘電体
８ 凸部
９ 貫通孔
１０ 係合部
１１，１２ 孔
２０ （樹脂製の）固定台[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a choke coil for a glass antenna used for improving reception sensitivity of an in-vehicle radio or the like.
[0002]
[Prior art]
A choke coil for a glass antenna attenuates noise in a high-frequency region, improves the S / N ratio, and improves the reception sensitivity of an in-vehicle radio or the like. A conductive wire is placed on a Ni-Zn columnar magnetic core. A coil that is laminated and wound in a shape is placed on a resin fixed base, and both ends of the coil are connected by soldering to two metal plates provided on the resin fixed base. The reception sensitivity is improved only by the frequency characteristic.
[0003]
[Problems to be solved by the invention]
As described above, the conventional choke coil for glass antenna attenuates the noise in the high frequency region by the frequency characteristic of the coil using the Ni-Zn columnar magnetic core and improves the reception sensitivity of the in-vehicle radio and the like. It was a thing.
[0004]
However, there is a limit to the amount of noise attenuation due only to the frequency characteristics of the coil. Therefore, there is a limit to improving the reception sensitivity of the in-vehicle radio.
[0005]
The technical problem of the present invention is to provide a choke coil for a glass antenna having a structure in which the amount of noise attenuation is further increased and the assembly is easier than in the prior art in order to eliminate the above-mentioned drawbacks. .
[0006]
[Means for Solving the Problems]
A plate-like dielectric is inserted between the metal terminal plate and the metal plate provided on the resin-made fixing base of the present invention, and the coil through which the magnetic core is inserted and the plate-like dielectric are electrically connected. Due to the structure connected in parallel, the plate-like dielectric increases the amount of noise attenuation in the high-frequency region as compared with the prior art, and becomes a choke coil for a glass antenna that improves the reception sensitivity of the in-vehicle radio.
[0007]
That is, in the present invention, a coil obtained by laminating and winding a conducting wire in a cylindrical shape on a columnar magnetic core is installed on a resin fixed base, and the metal terminal plate and the metal plate provided on the resin fixed base In the choke coil in which both ends of the coil winding are connected, the resin-made fixing base includes a base portion having a convex portion having a hole through which the metal terminal plate is inserted and a base auxiliary portion, and the position of the convex portion is A plate-like dielectric is provided between the metal terminal plate and the metal plate, and an engaging portion for engaging the dielectric is provided on a surface of the base auxiliary portion facing the base portion. This is a glass antenna choke coil.
[0009]
(Function)
A choke coil for a glass antenna according to the present invention is provided with a plate-like dielectric between a metal terminal plate and a metal plate provided on a resin fixed base including a base portion and a base auxiliary portion, and a magnetic core is provided. The inserted coil and the plate-like dielectric are electrically connected in parallel.
[0010]
The resonance frequency of the plate-like dielectric has a characteristic determined by the thickness of the plate-like dielectric. Therefore, in order to resonate at an arbitrary frequency, it is necessary to change the thickness.
[0011]
For this reason, an engagement portion is provided in the base auxiliary portion so that the plate-like dielectric can be inserted into the metal terminal plate and the metal plate even if the thickness of the plate-like dielectric changes. It has a structure.
[0012]
With this structure, the resonance effect of the plate-like dielectric becomes a high-impedance element in the high-frequency region, a large amount of noise attenuation is obtained, the S / N ratio of a vehicle-mounted radio, etc. is improved, and the reception sensitivity is improved. be able to.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the invention will be described with reference to FIGS. 1, 2, and 3.
[0014]
FIG. 1 is an explanatory view of a choke coil for a glass antenna according to the present invention. FIG. 1 (a) is a perspective view and FIG. 1 (b) is a plan view. FIG. 2 is a perspective view of the
[0015]
As shown in FIG. 1, a choke coil for a glass antenna according to the present invention includes a copper wire laminated in a cylindrical shape, a Ni-Zn columnar
[0016]
Further, as shown in FIG. 2, the
[0017]
In addition, as shown in FIG. 3, the base
[0018]
With this structure, the plate-like dielectric 7 can be reliably inserted into the
[0019]
Therefore, the choke coil for the glass antenna functions as a high impedance element in the high frequency region due to the resonance action of the plate-like dielectric material, so that a large amount of noise attenuation can be obtained, and the S / N of an in-vehicle radio or the like can be obtained. The ratio is improved and the reception sensitivity can be improved.
[0020]
【The invention's effect】
As described above, according to the present invention, the plate-like dielectric is disposed between the terminals of the coil, the resin fixing base is divided into the base portion and the base auxiliary portion, and the dielectric engaging portion is provided in the base auxiliary portion. With the structure provided, the S / N ratio of a vehicle-mounted radio or the like can be improved, the receiving sensitivity can be improved, and an inexpensive choke coil that is easy to assemble can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a choke coil for a glass antenna according to the present invention. FIG. 1A is a perspective view. FIG. 1B is a plan view.
FIG. 2 is a perspective view of a base portion of a choke coil for a glass antenna according to the present invention.
FIG. 3 is a perspective view of a base auxiliary portion of a choke coil for a glass antenna according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coil 2 (Cylinder-shaped)
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03544296A JP3649502B2 (en) | 1996-01-29 | 1996-01-29 | choke coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03544296A JP3649502B2 (en) | 1996-01-29 | 1996-01-29 | choke coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09213528A JPH09213528A (en) | 1997-08-15 |
| JP3649502B2 true JP3649502B2 (en) | 2005-05-18 |
Family
ID=12441959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03544296A Expired - Fee Related JP3649502B2 (en) | 1996-01-29 | 1996-01-29 | choke coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3649502B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4018608B2 (en) * | 2003-09-08 | 2007-12-05 | セントラル硝子株式会社 | Antenna coil device |
| JP4850181B2 (en) * | 2005-08-15 | 2012-01-11 | 原田工業株式会社 | Noise filter |
| WO2007138775A1 (en) | 2006-05-29 | 2007-12-06 | Sumida Corporation | Coil device for antenna and antenna system for rear window of vehicle |
| US7741945B2 (en) * | 2008-01-24 | 2010-06-22 | Abb Technology Ag | Dry-type transformer with improved terminal construction and mounting system therefor |
| JP5114325B2 (en) | 2008-07-08 | 2013-01-09 | 原田工業株式会社 | Roof mount antenna device for vehicle |
| WO2011090222A1 (en) * | 2010-01-20 | 2011-07-28 | Huh Chang Su | Noise filter and film antenna, and digital multimedia broadcast receiving system using a heating element for a vehicle and including the noise filter and film antenna |
| JP5654917B2 (en) | 2011-03-24 | 2015-01-14 | 原田工業株式会社 | Antenna device |
| USD726696S1 (en) | 2012-09-12 | 2015-04-14 | Harada Industry Co., Ltd. | Vehicle antenna |
| DE102013200696A1 (en) * | 2013-01-17 | 2014-07-17 | Würth Elektronik eiSos Gmbh & Co. KG | inductance component |
| JP6152739B2 (en) * | 2013-08-07 | 2017-06-28 | 株式会社オートネットワーク技術研究所 | Noise filter device |
-
1996
- 1996-01-29 JP JP03544296A patent/JP3649502B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09213528A (en) | 1997-08-15 |
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