JP3936562B2

JP3936562B2 - Double tuning circuit coupling adjustment structure

Info

Publication number: JP3936562B2
Application number: JP2001249508A
Authority: JP
Inventors: 茂長田
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2001-08-20
Filing date: 2001-08-20
Publication date: 2007-06-27
Anticipated expiration: 2021-08-20
Also published as: JP2003059723A

Description

【０００１】
【発明の属する技術分野】
本発明はテレビチューナ等に使用して好適な複同調回路の結合調整構造に関する。
【０００２】
【従来の技術】
従来の複同調回路の結合調整構造の構成を図６に基づいて説明すると、プリント基板５１には、種々の電気部品（図示せず）が配置されて、第１、第２の同調回路５２，５３が隣り合わせに形成されている。
また、この第１，第２の同調回路５２，５３の一部を構成する第１，第２コイル５４，５５は、線材が巻回されて形成された巻回部５４ａ、５５ａと、巻回部５４ａ、５５ａの両端部に位置する取付脚５４ｂ、５５ｂとを有する。
【０００３】
そして、この第１，第２コイル５４，５５は、互いに巻回部５４ａ、５５ａが近接した状態で、巻回部５４ａ、５５ａがプリント基板５１上に立設して載置されると共に、取付脚５４ｂ、５５ｂをプリント基板５１に挿通し、取付脚５４ｂ、５５ｂがプリント基板５１の下面に設けられた導電パターン（図示せず）に半田付けされて取り付けられている。
【０００４】
このように構成された複同調回路は、第１，第２コイル５４，５５の互いに対向する巻回部５４，５５の一端側を矢印Ｚ方向に変形させて、Ｍ結の調整を行うようになっている。
【０００５】
【発明が解決しようとする課題】
従来の複同調回路の結合調整構造は、第１，第２コイル５４，５５の巻回部５４ａ、５５ａの一部を変形させるため、巻回部５４ａ、５５ａがプリント基板５１に対して立設されており、従って、高さが大きくなるという問題がある。
【０００６】
そこで、本発明は薄型で、調整の容易な複同調回路の結合調整構造を提供することを目的とする。
【０００７】
【課題を解決するための手段】
上記課題を解決するため、本発明の複同調回路の結合調整構造では、プリント基板と、このプリント基板の一面側及び他面側の対向領域に形成された導電パターンを接続導体にて接続してなる第１コイルを有する第１の同調回路と、前記プリントの一面側及び他面側の対向領域に形成された導電パターンを接続導体にて接続してなり一端部が前記第１コイルの一端部に近接配置された第２コイルを有する第２の同調回路と、前記プリント基板の一面側に形成された第１の接地用導電パターンと、前記プリント基板の他面側に形成された第２の接地用導電パターンと、前記プリント基板の一面側において前記第１、第２コイル間に位置し前記第１の接地用導電パターンに対し非導通状態にある第１島状導電パターンと、前記プリント基板の一面側において前記第１、第２コイル間に位置し前記第１の接地用導電パターンと前記第１島状導電パターンとを接続し前記第１、第２コイル間のＭ結合を調整するための第１のジャンパー部材と、前記プリント基板の他面側において前記第１、第２コイル間に位置し前記第２の接地用導電パターンに対し非導通状態にある第２島状導電パターンと、前記プリント基板の他面側において前記第１、第２コイル間に位置し前記第２の接地用導電パターンと前記第２島状導電パターンとを接続し前記第１、第２コイル間のＭ結合を調整するための第２のジャンパー部材とを備え、前記第１のコイルと前記第２のコイルとが互いに向かい合って直線状に配置され、前記第１、第２の接地用導電パターンが導体によって接続されると共に、前記第１、第２島状導電パターンが導体によって接続され、前記第１島状導電パターンと前記第２島状導電パターンとを接続する導体は、前記第１、第２島状導電パターン間の前記プリント基板に形成されたスルーホールに充填されてなることとした。
【００１１】
【発明の実施の形態】
本発明の複同調回路の結合調整構造の図面を説明すると、図１は複同調回路の結合調整構造の第１実施例に係る平面図、図２は図１の２−２線における断面図、図３は複同調回路の結合調整構造の第２実施例に係る平面図、図４は図３の４−４線における断面図、図５は複同調回路の結合調整構造の第２実施例に係る下面図である。
【００１２】
次に、複同調回路の結合調整構造の第１実施例に係る構成を図１，図２に基づいて説明すると、プリント基板１は、平板状の絶縁板からなり、このプリント基板１には、種々の電気部品（図示せず）が配置されて、第１、第２の同調回路２，３が隣り合わせに形成されている。
【００１３】
また、この第１の同調回路２の一部を構成する第１コイル４は、プリント基板１の一面側に設けられた第１の導電パターン５と、プリント基板１の他面側に設けられた第２の導電パターン６と、第１，第２の導電パターン５，６の対向する端部側に設けられたプリント基板１の貫通孔（スルーホール）１ａに充填されて、第１，第２の導電パターン５，６の端部を互いに接続する接続導体７とで構成されている。
そして、第１，第２の導電パターン５，６とでジグザグ状になると共に、第１の導電パターン５の両端部５ａ、５ｂがそれぞれ第１の同調回路２に接続されている。
【００１４】
また、この第２の同調回路３の一部を構成する第２コイル８は、プリント基板１の一面側に設けられた第１の導電パターン９と、プリント基板１の他面側に設けられた第２の導電パターン１０と、第１，第２の導電パターン９，１０の対向する端部側に設けられたプリント基板１の貫通孔（スルーホール）１ｂに充填されて、第１，第２の導電パターン９，１０の端部を互いに接続する接続導体１１とで構成されている。
そして、第１，第２の導電パターン９，１０とでジグザグ状になると共に、第１の導電パターン９の両端部９ａ、９ｂがそれぞれ第２の同調回路３に接続されている。
【００１５】
更に、第１，第２コイル４，８の一端同士は、互いに近接した状態で配置されている。
また、プリント基板１の一面側には、第１，第２コイル４，８を挟むように形成された一対の接地用導電パターン１２、１３と、この接地用導電パターン１２，１３から第１，第２コイル４，８間に延びて形成された突出導電パターン１２ａ、１３ａと、この突出導電パターン１２ａ、１３ａ間に位置し、接地用導電パターン１２，１３に非導通状態にある島状導電パターン１４とが設けられている。
【００１６】
金属板、或いは金属線等の良導電体からなるジャンパー部材１５は、接地用導電パターン１２の突出導電パターン１２ａと、島状導電パターン１４との間に跨って、半田付けにより取り付けられている。
そして、このジャンパー部材１５は、第１，第２コイル４，８間に位置して、第１，第２コイル４，８間のＭ結の調整が行われる。
また、ここでは図示しないが、必要に応じて、接地用導電パターン１３の突出導電パターン１３ａと島状導電パターン１４との間にもう１個のジャンパー部材１５を接続、配置しても良い。
【００１７】
即ち、このように構成された複同調回路は、第１，第２コイル４，８間に置いて、ジャンパー部材１５を配置することによって、第１，第２コイル４，８間の結合度を減少させて、複同調回路のＭ結の調整を行うようになっている。
【００１８】
また、図３〜図５は本発明の複同調回路の結合調整構造の第２実施例を示し、この第２実施例は、プリント基板１の他面側において、第１，第２コイル４，８の間に突出する突出導電パターン１６ａ，１７ａを有する一対の接地用導電パターン１６，１７を有すると共に、その突出導電パターン１６ａ、１７ａ間には、島状導電パターン１８を設けている。
【００１９】
そして、プリント基板１の一面側に位置する接地用導電パターン１２，１３と、他面側に位置する接地用導電パターン１６，１７は、導体１９によって接続されると共に、プリント基板１の一面と他面に位置する島状導電パターン１４，１８も、導体２０によって接続された構成となっている。そして、突出導電パターン１６ａ、又は／及び１７ａと島状導電パターン１８との間にジャンパー部材１５を接続、配置することによって、複同調回路のＭ結の調整を行うようになっている。
【００２０】
その他の構成は、第１実施例と同様であるので、同一部品に同一番号を付し、ここではその説明を省略する。そして、この第２実施例のように、プリント基板１の両面側にジャンパー部材１５を配置することによって、一層、広範囲のＭ結の調整ができる。
【００２１】
【発明の効果】
本発明の複同調回路の結合調整構造は、第１，第２コイル４，８がプリント基板１の一面に位置する第１の導電パターン５，９と、プリント基板１の他面に位置する第２の導電パターン６，１０とが互いに接続導体７，１１によって接続されて形成されたため、第１，第２コイル４，８の高さを小さくできて、薄型にできると共に、第１，第２コイル４，８の一端同士が近接して配置され、プリント基板１の少なくとも一面側には、第１の接地用導電パターン１２が設けられて、この第１の接地用導電パターン１２に接続された第１のジャンパー部材１５が第１，第２コイル４，８間に位置して、Ｍ結を調整するようにしたため、複同調回路の結合の調整可能なものが提供できる。
【００２２】
また、第１，第２コイル４，８間に位置するプリント基板の一面側には、第１の接地用導電パターン１２と非導通状態にある第１島状導電パターン１４を有し、第１のジャンパー部材１５が第１の接地用導電パターン１２と第１島状導電パターン１４とに接続されたため、ジャンパー部材１５の接続が容易で、接続強度の大きなものが得られる。
【００２３】
また、プリント基板１の他面側には、第２の接地用導電パターン１６と、第１，第２コイル４，８間に位置し、第２の接地用導電パターン１６と非導通状態にある第２島状導電パターン１８とを有し、第１，第２の接地用導電パターン１２，１６が導体１９によって接続されると共に、第１，第２島状導電パターン１４，１８が導体２０によって接続されたため、それぞれが同じ電位にできると共に、プリント基板１の両面で、Ｍ結の調整可能なものが得られる。
【００２４】
また、第２の接地用導電パターン１６と第２島状導電パターン１８には、第２のジャンパー部材１５が接続されて、Ｍ結を調整するようにしたため、ジャンパー部材１５の接続が容易で、接続強度の大きなものが得られると共に、一層、広範囲のＭ結の調整ができる。
【図面の簡単な説明】
【図１】本発明の複同調回路の結合調整構造の第１実施例に係る平面図。
【図２】図１の２−２線における断面図。
【図３】複同調回路の結合調整構造の第２実施例に係る平面図。
【図４】図３の４−４線における断面図。
【図５】複同調回路の結合調整構造の第２実施例に係る下面図。
【図６】従来の複同調回路の結合調整構造を示す正面図。
【符号の説明】
１プリント基板
１ａ貫通孔
１ｂ貫通孔
２第１の同調回路
３第２の同調回路
４第１コイル
５第１の導電パターン
５ａ端部
５ｂ端部
６第２の導電パターン
７接続導体
８第２コイル
９第１の導電パターン
９ａ端部
９ｂ端部
１０第２の導電パターン
１１接続導体
１２接地用導電パターン
１２ａ突出導電パターン
１３接地用導電パターン
１３ａ突出導電パターン
１４島状導電パターン
１５ジャンパー部材
１６接地用導電パターン
１６ａ突出導電パターン
１７接地用導電パターン
１７ａ突出導電パターン
１８島状導電パターン
１９導体
２０導体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a double tuning circuit coupling adjustment structure suitable for use in a television tuner or the like.
[0002]
[Prior art]
The structure of the conventional double tuning circuit coupling adjustment structure will be described with reference to FIG. 6. Various electric parts (not shown) are arranged on the printed circuit board 51, and the first and second tuning circuits 52, 53 are formed adjacent to each other.
The first and second coils 54 and 55 constituting a part of the first and second tuning circuits 52 and 53 include winding portions 54a and 55a formed by winding a wire, and windings. And mounting legs 54b and 55b located at both ends of the portions 54a and 55a.
[0003]
The first and second coils 54 and 55 are mounted while the winding portions 54a and 55a are erected on the printed circuit board 51 in a state where the winding portions 54a and 55a are close to each other. The legs 54b and 55b are inserted into the printed circuit board 51, and the mounting legs 54b and 55b are soldered and attached to a conductive pattern (not shown) provided on the lower surface of the printed circuit board 51.
[0004]
In the double-tuned circuit configured as described above, one end side of the winding portions 54 and 55 facing each other of the first and second coils 54 and 55 is deformed in the arrow Z direction to adjust the M connection. It has become.
[0005]
[Problems to be solved by the invention]
The conventional double-tuned circuit coupling adjustment structure deforms part of the winding portions 54a and 55a of the first and second coils 54 and 55, so that the winding portions 54a and 55a are erected with respect to the printed circuit board 51. Therefore, there is a problem that the height is increased.
[0006]
Accordingly, an object of the present invention is to provide a coupling adjustment structure for a double-tuned circuit that is thin and easy to adjust.
[0007]
[Means for Solving the Problems]
To solve the above problem, the coupling adjusting structure for a double-tuned circuit of the present invention, a printed circuit board, a conductive pattern formed in a region facing one surface and the other surface side of the printed circuit board and connected by connecting conductors A first tuning circuit having a first coil, and a conductive pattern formed in a facing region on one side and the other side of the print connected by a connecting conductor, one end of which is one end of the first coil A second tuning circuit having a second coil disposed in proximity to the printed circuit board, a first grounding conductive pattern formed on one side of the printed circuit board, and a second formed on the other side of the printed circuit board. A conductive pattern for grounding, a first island-shaped conductive pattern located between the first and second coils on one side of the printed circuit board and being non-conductive with the first conductive pattern for grounding, and the printed circuit board One side 1 for adjusting the M coupling between the first and second coils by connecting the first grounding conductive pattern and the first island-shaped conductive pattern located between the first and second coils. A jumper member, a second island-like conductive pattern located between the first and second coils on the other surface side of the printed board and being non-conductive to the second grounding conductive pattern, and the printed board On the other surface side, located between the first and second coils, connecting the second grounding conductive pattern and the second island-shaped conductive pattern to adjust the M coupling between the first and second coils. The first coil and the second coil are arranged in a straight line so as to face each other, and the first and second grounding conductive patterns are connected by a conductor. And the first and second Joshirubeden pattern is connected by a conductor, the conductor for connecting the first island-shaped conductive pattern and the second island-like conductive pattern, the first, formed on the printed circuit board between the second island-like conductive pattern The through hole was filled .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a plan view according to a first embodiment of a coupling adjustment structure for a double-tuned circuit, and FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 3 is a plan view according to a second embodiment of the coupling adjustment structure of the double-tuned circuit, FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, and FIG. 5 is a second embodiment of the coupling adjustment structure of the double-tuned circuit. FIG.
[0012]
Next, the configuration according to the first embodiment of the coupling adjustment structure of the double-tuned circuit will be described with reference to FIGS. 1 and 2. The printed circuit board 1 is composed of a flat insulating plate. Various electric components (not shown) are arranged, and the first and second tuning circuits 2 and 3 are formed adjacent to each other.
[0013]
Further, the first coil 4 constituting a part of the first tuning circuit 2 is provided on the first surface of the printed circuit board 1 and on the other surface side of the printed circuit board 1. The first and second conductive patterns 6 and the first and second conductive patterns 5 and 6 are filled in through holes (through-holes) 1a of the printed circuit board 1 provided on opposite ends of the first and second conductive patterns 5 and 6. The conductive conductors 5 and 6 are connected conductors 7 that connect the ends of the conductive patterns 5 and 6 to each other.
The first and second conductive patterns 5 and 6 are zigzag-shaped, and both end portions 5 a and 5 b of the first conductive pattern 5 are connected to the first tuning circuit 2.
[0014]
The second coil 8 constituting a part of the second tuning circuit 3 is provided on the other surface side of the printed circuit board 1 and the first conductive pattern 9 provided on the one surface side of the printed circuit board 1. The second conductive pattern 10 and the through holes (through holes) 1b of the printed circuit board 1 provided on the opposite end portions of the first and second conductive patterns 9 and 10 are filled, and the first and second The connection conductors 11 connect the end portions of the conductive patterns 9 and 10 to each other.
The first and second conductive patterns 9 and 10 are zigzag-shaped, and both end portions 9 a and 9 b of the first conductive pattern 9 are connected to the second tuning circuit 3.
[0015]
Further, one ends of the first and second coils 4 and 8 are arranged in a state of being close to each other.
Further, on one surface side of the printed circuit board 1, a pair of grounding conductive patterns 12, 13 formed so as to sandwich the first and second coils 4, 8, and the grounding conductive patterns 12, 13 to the first, The projecting conductive patterns 12a and 13a formed extending between the second coils 4 and 8, and the island-shaped conductive pattern located between the projecting conductive patterns 12a and 13a and in a non-conductive state with the grounding conductive patterns 12 and 13 14 is provided.
[0016]
A jumper member 15 made of a good conductor such as a metal plate or a metal wire is attached by soldering so as to straddle between the projecting conductive pattern 12a of the grounding conductive pattern 12 and the island-like conductive pattern 14.
And this jumper member 15 is located between the 1st, 2nd coils 4 and 8, and adjustment of M connection between the 1st, 2nd coils 4 and 8 is performed.
Although not shown here, another jumper member 15 may be connected and disposed between the projecting conductive pattern 13a of the grounding conductive pattern 13 and the island-shaped conductive pattern 14 as necessary.
[0017]
That is, the double-tuned circuit configured as described above is arranged between the first and second coils 4 and 8 and the jumper member 15 is arranged to thereby increase the degree of coupling between the first and second coils 4 and 8. By decreasing, the M-tuning of the double-tuned circuit is adjusted.
[0018]
3 to 5 show a second embodiment of the double tuning circuit coupling adjustment structure according to the present invention. This second embodiment is arranged on the other surface side of the printed circuit board 1 with the first, second coils 4 and 4. 8 includes a pair of ground conductive patterns 16 and 17 having projecting conductive patterns 16a and 17a projecting between them, and an island-shaped conductive pattern 18 is provided between the projecting conductive patterns 16a and 17a.
[0019]
Then, the ground conductive patterns 12 and 13 located on one side of the printed circuit board 1, the grounding conductor pattern 16 and 17 positioned on the other side is connected by a conductor 19, one surface of the printed circuit board 1 and the other The island-like conductive patterns 14 and 18 located on the surface are also connected by the conductor 20. The jumper member 15 is connected and arranged between the protruding conductive pattern 16a or / and 17a and the island-shaped conductive pattern 18, thereby adjusting the M-tuning of the double-tuned circuit.
[0020]
Since other configurations are the same as those of the first embodiment, the same parts are denoted by the same reference numerals, and the description thereof is omitted here. Then, as in this second embodiment, by placing a jumper member 15 on both sides of the printed circuit board 1, further, it can be adjusted in a wide range of M binding.
[0021]
【The invention's effect】
In the double tuning circuit coupling adjusting structure according to the present invention, the first and second coils 4 and 8 are disposed on one surface of the printed circuit board 1 and the first conductive patterns 5 and 9 are disposed on the other surface of the printed circuit board 1. Since the two conductive patterns 6 and 10 are connected to each other by the connection conductors 7 and 11, the heights of the first and second coils 4 and 8 can be reduced, and the first and second coils can be made thin. One ends of the coils 4 and 8 are arranged close to each other, and a first grounding conductive pattern 12 is provided on at least one surface side of the printed circuit board 1 and connected to the first grounding conductive pattern 12. Since the first jumper member 15 is positioned between the first and second coils 4 and 8 to adjust the M connection, it is possible to provide an adjustable coupling of the double-tuned circuit.
[0022]
Further, on one surface side of the printed circuit board located between the first and second coils 4 and 8, there is a first island-like conductive pattern 14 that is in a non-conductive state with the first grounding conductive pattern 12. Since the jumper member 15 is connected to the first grounding conductive pattern 12 and the first island-like conductive pattern 14, the jumper member 15 can be easily connected and a connection strength can be obtained.
[0023]
Further, on the other surface side of the printed circuit board 1, the second grounding conductive pattern 16 is located between the first and second coils 4 and 8 and is in a non-conductive state with the second grounding conductive pattern 16. And the first and second grounding conductive patterns 12 and 16 are connected by a conductor 19, and the first and second island-like conductive patterns 14 and 18 are connected by a conductor 20. Since they are connected to each other, they can be set to the same potential, and on both sides of the printed circuit board 1, an M-junction adjustable one can be obtained.
[0024]
In addition, since the second jumper member 15 is connected to the second grounding conductive pattern 16 and the second island-like conductive pattern 18 and the M connection is adjusted, the connection of the jumper member 15 is easy. A large connection strength can be obtained, and a wider range of M-bonding can be adjusted.
[Brief description of the drawings]
FIG. 1 is a plan view according to a first embodiment of a coupling adjustment structure for a double-tuned circuit according to the present invention;
FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.
FIG. 3 is a plan view according to a second embodiment of a coupling adjustment structure for a double-tuned circuit.
4 is a cross-sectional view taken along line 4-4 of FIG.
FIG. 5 is a bottom view according to the second embodiment of the double tuning circuit coupling adjustment structure;
FIG. 6 is a front view showing a coupling adjustment structure of a conventional double-tuned circuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Printed circuit board 1a Through-hole 1b Through-hole 2 1st tuning circuit 3 2nd tuning circuit 4 1st coil 5 1st conductive pattern 5a End part 5b End part 6 Second conductive pattern 7 Connection conductor 8 Second coil 9 first conductive pattern 9a end 9b end 10 second conductive pattern 11 connecting conductor 12 grounding conductive pattern 12a protruding conductive pattern 13 grounding conductive pattern 13a protruding conductive pattern 14 island-like conductive pattern 15 jumper member 16 for grounding Conductive pattern 16a Protruding conductive pattern 17 Grounding conductive pattern 17a Protruding conductive pattern 18 Island-like conductive pattern 19 Conductor 20 Conductor

Claims

A printed circuit board, a first tuning circuit having a first coil formed by connecting conductive patterns formed in opposing regions on one surface side and the other surface side of the printed circuit board with a connection conductor, one surface side of the print, A second tuning circuit having a second coil in which a conductive pattern formed in a facing region on the other surface side is connected by a connecting conductor and having one end disposed close to one end of the first coil; A first grounding conductive pattern formed on one surface side of the substrate; a second grounding conductive pattern formed on the other surface side of the printed circuit board; and the first and second surfaces on the one surface side of the printed circuit board. A first island-like conductive pattern located between the coils and being in a non-conductive state with respect to the first grounding conductive pattern; and the first island-like conductive pattern located between the first and second coils on one side of the printed circuit board. Conductive pad for grounding And a first jumper member for adjusting the M coupling between the first and second coils and connecting the first island-like conductive pattern to the first island-like conductive pattern; A second island-shaped conductive pattern located between two coils and being non-conductive with respect to the second grounding conductive pattern; and the second island-shaped conductive pattern located between the first and second coils on the other surface side of the printed circuit board. the connection with the second ground conductive pattern and the second island conductive pattern first, and a second jumper member for adjusting the M coupling between the second coil, wherein said first coil The first coil and the second grounding conductive pattern are connected by a conductor, and the first and second island-shaped conductive patterns are connected by a conductor . The first island-shaped conductive pattern And connecting the second island conductive pattern conductors, the first, the double-tuned circuit, characterized in that formed by filling the through-holes formed in said printed circuit board between the second island-like conductive pattern Bonding adjustment structure.