JP3780186B2 - PCB connection structure - Google Patents

PCB connection structure Download PDF

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Publication number
JP3780186B2
JP3780186B2 JP2001248778A JP2001248778A JP3780186B2 JP 3780186 B2 JP3780186 B2 JP 3780186B2 JP 2001248778 A JP2001248778 A JP 2001248778A JP 2001248778 A JP2001248778 A JP 2001248778A JP 3780186 B2 JP3780186 B2 JP 3780186B2
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Japan
Prior art keywords
printed circuit
circuit board
connection structure
metal plate
boards
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Expired - Fee Related
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JP2003060325A (en
Inventor
義明 清水
哲一 岡本
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Cosel Co Ltd
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Cosel Co Ltd
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Publication of JP2003060325A publication Critical patent/JP2003060325A/en
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  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Combinations Of Printed Boards (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、スイッチング電源装置等の複数のプリント基板を接続して電気回路を構成するプリント基板の接続構造に関する。
【０００２】
【従来の技術】
従来、例えばスイッチングレギュレータ電源装置は、互いに物理的に分離された状態で電気的に接続されたアクティブフィルタとＤＣ／ＤＣコンバータを備えていた。この接続構造は、図３に示すように、アクティブフィルタ２を構成するプリント基板３と、アクティブフィルタ２によって昇圧された電圧が入力するＤＣ／ＤＣコンバータ４を構成するプリント基板５とが電線６により繋がれていた。電線６は、各プリント基板３，５の端子７に各々接続され、各端子７には、各プリント基板３，５上の各電子素子８と接続している。
【０００３】
【発明が解決しようとする課題】
上記従来の技術の場合、図３に示すように、アクティブフィルタ２を構成するプリント基板３と、ＤＣ／ＤＣコンバータ４を構成するプリント基板５の接続を行う場合、電気的接続に用いる各電線６の寄生インダクタンス６ａや浮遊容量６ｂによって、電圧の異常共振や、ＤＣ／ＤＣコンバータ４に必要な高周波電流を流せない等、回路に悪影響を及ぼすものであった。
【０００４】
特に図４に示すように、プリント基板３，５を対面させて設置し近接させると、プリント基板３，５から放射される電磁波によるノイズによって、各回路基板３，５内の回路の誤動作が発生するという問題があった。さらに、スイッチングレギュレータ電源装置から発生するノイズを抑制するフィルタ回路の効果が十分に得られないという問題もあった。
【０００５】
その他、電線６単体には強度がないため、複数のプリント基板３，５を固定するためには、別途プリント基板３，５を固定する構造が必要となり、構造が複雑化するものであった。特に図５、図６に示すように３枚以上のプリント基板３，５ａ，５ｂ等を互いに対面させて平行に設ける場合、寄生インダクタンス対策、ノイズ対策、プリント基板固定手段が必要であり、装置全体が大型、高コスト化する問題があった。さらに、電線６の接続構造において、図５に示すような構造の場合、プリント基板５の端子７の取り付け部の負担が大きく構造が複雑化する。また、図６に示す場合、プリント基板３の端子７の取り付けスペースが増加してしまう等の問題があった。
【０００６】
本発明は、上記従来の技術に鑑みてなされたもので、ノイズを抑え、接続が簡単であり取り付け強度も高いプリント基板の接続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】
この発明は、複数のプリント基板を互いに対面させて並べ、各プリント基板の端縁部に実装部品の端子取付部を設け、各端子取付部に跨って帯状の金属板を掛け渡し、この金属板により各端子を電気的に接続したプリント基板の接続構造である。上記金属板には、所定箇所に透孔が形成され、この透孔にネジを挿通して、上記プリント基板の端子取付部に上記金属板をネジ止めするものである。
【０００８】
またこの発明は、対面して平行に並べた各プリント基板間に、金属の板等の電磁波遮蔽板を配置し、各プリント基板間のノイズを遮蔽したものである。
【０００９】
【発明の実施の形態】
以下この発明の実施の形態について図面に基づいて説明する。図１、図２は、この発明の一実施形態を示すもので、この実施形態のプリント基板は、例えばスイッチングレギュレータ電源装置に用いられるもので、互いに平行に対面して分離された状態で、アクティブフィルタ１２を構成するプリント基板１３と、アクティブフィルタ１２によって昇圧された電圧が入力するＤＣ／ＤＣコンバータ１４を構成するプリント基板１５とが接続されたものである。
【００１０】
アクティブフィルタ１２のプリント基板１３と、ＤＣ／ＤＣコンバータ１４のプリント基板１５には、各プリント基板１３，１５の端縁部に実装部品１８，１９の端子取付部２０を各々一対ずつ設け、各端子取付部２０の図示しない端子間に跨って帯状の金属板２１，２２が取り付けられている。この金属板２１，２２は、各端子を電気的に接続するもので、所定箇所に図示しない透孔が形成され、端子取付部２０に形成された雌ネジ部にこの透孔を介してネジ２４が螺合して接続固定されている。
【００１１】
アクティブフィルタ１２のプリント基板１３と、ＤＣ／ＤＣコンバータ１４のプリント基板１５との間には、電磁波遮蔽効果を備えた電磁波遮蔽板２６が配置されている。この電磁波遮蔽板２６は、金属の板等から成り、図示しないアース端子に接続されている。なお、電磁波遮蔽板２６は、金属網や、金属箔等が設けられた導電性の樹脂板等、適宜の電磁波遮蔽効果を備えたものであればよい。また、この電磁波遮蔽板２６は、プリント基板１３，１５が設けられた電子機器の構造体への取り付け、または支持構造に使用することもできる。
【００１２】
この実施形態のアクティブフィルタ１２を構成するプリント基板１３と、ＤＣ／ＤＣコンバータ１４を構成するプリント基板１５は、金属板２１，２２により接続されているので、電線により繋いだ場合と比較して、電流経路の断面積を大きくすることが可能であり、寄生インダクタンスの影響を軽減することができる。さらに、電線と比較して剛性のある金属板２１，２２で接続を行うため、図２に示すように、ＤＣ／ＤＣコンバータ１４を構成する複数のプリント基板１５ａ，１５ｂの接続も、同様の端子取付部２０を設けて、ネジ２４によりネジ止めするだけで各プリント基板１３，１５ａ，１５ｂの連結保持が可能となる。
【００１３】
また、プリント基板１３，１５等の間に設けた電磁波遮蔽板２６は、アクティブフィルタ１２を構成するプリント基板１３とＤＣ／ＤＣコンバータ１４を構成するプリント基板１５、もしくはＤＣ／ＤＣコンバータ１４を構成する基板１５ａ，１５ｂ同士を近接させて配置することが可能となり、各プリント基板１３，１５から発生するノイズの影響を互いに軽減するとともに、各プリント基板１３，１５の取り付け部材を兼ねることができ、装置の小型化にも寄与する。
【００１４】
なお、この発明のプリント基板の取付構造は、上記実施形態に限定されるものではなく、プリント基板の取り付け方向や位置、金属板との接続方法は適宜設定可能なものである。また、一つのアクティブフィルタを構成するプリント基板に、複数のＤＣ／ＤＣコンバータを構成するプリント基板を平行に配置して、接続を行う場合も、上記実施形態と同様に接続可能であり、同様の効果を有する。
【００１５】
【発明の効果】
この発明のプリント基板の接続構造は、金属板で各プリント基板の端子接続部を接続することにより、寄生インダクタンス等の悪影響を最小限に抑えることができるとともに、電線による場合と比較して、電流経路の断面積を大きくすることができる。さらに、複数のプリント基板の電気的接続及び固定を、容易かつ確実に行うことができる。
【００１６】
また、プリント基板間に電磁波遮蔽板を設けたので、特にスイッチング電源装置においては、アクティブフィルタを構成するプリント基板とＤＣ／ＤＣコンバータを構成するプリント基板、もしくはＤＣ／ＤＣコンバータを構成する基板同士を近接させて配置することが可能となる。
【００１７】
そして、この発明のプリント基板の接続構造によれば、複数のプリント基板を備えた回路全体を低インダクタンス化することが可能であり、回路を安定に動作させることができる。従って、複数のプリント基板を備えた装置全体を小型化、低コスト化することができ、部品の効率的な配置が可能となる。
【図面の簡単な説明】
【図１】この発明の一実施形態のプリント基板の接続構造を示す正面図である。
【図２】この発明の一実施形態のプリント基板の接続構造の他の例を示す斜視図である。
【図３】従来のプリント基板の接続構造の平面図である。
【図４】従来のプリント基板の接続構造の他の例を示す斜視図である。
【図５】従来のプリント基板の接続構造の他の例を示す斜視図である。
【図６】従来のプリント基板の接続構造の他の例を示す斜視図である。
【符号の説明】
１２ アクティブフィルタ
１３，１５ プリント基板
１４ ＤＣ／ＤＣコンバータ
１８，１９ 実装部品
２０ 端子取付部
２１，２２ 金属板
２４ ネジ
２６ 電磁波遮蔽板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printed circuit board connection structure in which an electric circuit is configured by connecting a plurality of printed circuit boards such as a switching power supply device.
[0002]
[Prior art]
Conventionally, for example, a switching regulator power supply device includes an active filter and a DC / DC converter that are electrically connected in a state of being physically separated from each other. As shown in FIG. 3, this connection structure includes a printed circuit board 3 constituting the active filter 2 and a printed circuit board 5 constituting a DC / DC converter 4 to which a voltage boosted by the active filter 2 is input by an electric wire 6. It was connected. The electric wires 6 are connected to the terminals 7 of the printed boards 3 and 5, respectively. The terminals 7 are connected to the electronic elements 8 on the printed boards 3 and 5.
[0003]
[Problems to be solved by the invention]
In the case of the above conventional technique, as shown in FIG. 3, when connecting the printed circuit board 3 constituting the active filter 2 and the printed circuit board 5 constituting the DC / DC converter 4, each electric wire 6 used for electrical connection is used. The parasitic inductance 6a and stray capacitance 6b adversely affect the circuit, such as abnormal resonance of the voltage and the inability to pass a high-frequency current necessary for the DC / DC converter 4.
[0004]
In particular, as shown in FIG. 4, when the printed boards 3 and 5 are placed facing each other and brought close to each other, malfunctions of the circuits in the circuit boards 3 and 5 occur due to noise caused by electromagnetic waves radiated from the printed boards 3 and 5. There was a problem to do. Furthermore, there is a problem that the effect of the filter circuit that suppresses noise generated from the switching regulator power supply device cannot be obtained sufficiently.
[0005]
In addition, since the electric wire 6 alone has no strength, a structure for separately fixing the printed boards 3 and 5 is necessary to fix the plurality of printed boards 3 and 5, and the structure becomes complicated. In particular, as shown in FIGS. 5 and 6, when three or more printed circuit boards 3, 5a, 5b, etc. are provided facing each other in parallel, countermeasures for parasitic inductance, noise countermeasures, and printed circuit board fixing means are required. However, there was a problem that the size and cost were increased. Furthermore, in the connection structure of the electric wires 6, in the case of the structure as shown in FIG. 5, the burden on the attachment portion of the terminal 7 of the printed circuit board 5 is large and the structure becomes complicated. Further, in the case shown in FIG. 6, there is a problem that an installation space for the terminal 7 of the printed circuit board 3 is increased.
[0006]
The present invention has been made in view of the above-described conventional technology, and an object of the present invention is to provide a printed circuit board connection structure that suppresses noise, is simple in connection, and has high attachment strength.
[0007]
[Means for Solving the Problems]
In this invention, a plurality of printed circuit boards are arranged facing each other, a terminal mounting portion of a mounting component is provided at an edge portion of each printed circuit board, and a belt-shaped metal plate is spanned across each terminal mounting portion. This is a printed circuit board connection structure in which each terminal is electrically connected. The metal plate is formed with a through hole at a predetermined position, and a screw is inserted into the through hole, and the metal plate is screwed to the terminal mounting portion of the printed board.
[0008]
Further, according to the present invention, an electromagnetic wave shielding plate such as a metal plate is disposed between printed circuit boards arranged in parallel to face each other, and noise between the printed circuit boards is shielded.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention. A printed circuit board according to this embodiment is used in, for example, a switching regulator power supply device, and is active in a state of facing and separating from each other in parallel. A printed circuit board 13 constituting the filter 12 and a printed circuit board 15 constituting a DC / DC converter 14 to which a voltage boosted by the active filter 12 is input are connected.
[0010]
The printed circuit board 13 of the active filter 12 and the printed circuit board 15 of the DC / DC converter 14 are each provided with a pair of terminal mounting portions 20 of the mounting components 18 and 19 on the edge portions of the printed circuit boards 13 and 15, respectively. Band-shaped metal plates 21 and 22 are attached across terminals (not shown) of the attachment portion 20. The metal plates 21 and 22 are used to electrically connect the terminals. A through hole (not shown) is formed at a predetermined location, and a screw 24 is formed on the female screw portion formed in the terminal mounting portion 20 via the through hole. Are screwed together and fixed.
[0011]
An electromagnetic wave shielding plate 26 having an electromagnetic wave shielding effect is disposed between the printed circuit board 13 of the active filter 12 and the printed circuit board 15 of the DC / DC converter 14. The electromagnetic wave shielding plate 26 is made of a metal plate or the like, and is connected to a ground terminal (not shown). Note that the electromagnetic wave shielding plate 26 may have any appropriate electromagnetic wave shielding effect, such as a conductive resin plate provided with a metal net, metal foil, or the like. Further, the electromagnetic wave shielding plate 26 can also be used for attachment to a structure of an electronic device provided with the printed boards 13 and 15 or a support structure.
[0012]
Since the printed circuit board 13 constituting the active filter 12 of this embodiment and the printed circuit board 15 constituting the DC / DC converter 14 are connected by the metal plates 21 and 22, compared with the case where they are connected by electric wires, The cross-sectional area of the current path can be increased, and the influence of parasitic inductance can be reduced. Further, since the metal plates 21 and 22 which are more rigid than the electric wires are connected, as shown in FIG. 2, the connection of the plurality of printed boards 15a and 15b constituting the DC / DC converter 14 is the same terminal. The printed circuit boards 13, 15 a, and 15 b can be connected and held simply by providing the mounting portion 20 and screwing with the screws 24.
[0013]
Further, the electromagnetic wave shielding plate 26 provided between the printed boards 13, 15, etc. constitutes the printed board 13 constituting the active filter 12 and the printed board 15 constituting the DC / DC converter 14, or the DC / DC converter 14. The boards 15a and 15b can be arranged close to each other, the influence of noise generated from the printed boards 13 and 15 can be reduced, and the printed board 13 and 15 can also serve as a mounting member. This contributes to downsizing of the product.
[0014]
The printed circuit board mounting structure of the present invention is not limited to the above embodiment, and the mounting direction and position of the printed circuit board and the method of connecting to the metal plate can be set as appropriate. Also, in the case where connection is made by arranging printed circuit boards constituting a plurality of DC / DC converters in parallel on a printed circuit board constituting one active filter, the connection can be made in the same manner as in the above embodiment. Has an effect.
[0015]
【The invention's effect】
The printed circuit board connection structure of the present invention can minimize adverse effects such as parasitic inductance by connecting the terminal connection portions of each printed circuit board with a metal plate, and has a current that is lower than that of a wire. The cross-sectional area of the path can be increased. Furthermore, electrical connection and fixing of a plurality of printed circuit boards can be performed easily and reliably.
[0016]
In addition, since the electromagnetic wave shielding plate is provided between the printed circuit boards, particularly in the switching power supply device, the printed circuit board constituting the active filter and the printed circuit board constituting the DC / DC converter, or the substrates constituting the DC / DC converter are connected to each other. It is possible to arrange them close to each other.
[0017]
According to the printed circuit board connection structure of the present invention, the entire circuit including the plurality of printed circuit boards can be reduced in inductance, and the circuit can be operated stably. Therefore, the entire apparatus including a plurality of printed circuit boards can be reduced in size and cost, and the components can be efficiently arranged.
[Brief description of the drawings]
FIG. 1 is a front view showing a printed circuit board connection structure according to an embodiment of the present invention.
FIG. 2 is a perspective view showing another example of a printed circuit board connection structure according to an embodiment of the present invention.
FIG. 3 is a plan view of a conventional printed circuit board connection structure.
FIG. 4 is a perspective view showing another example of a conventional printed circuit board connection structure.
FIG. 5 is a perspective view showing another example of a conventional printed circuit board connection structure.
FIG. 6 is a perspective view showing another example of a conventional printed circuit board connection structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 12 Active filter 13, 15 Printed circuit board 14 DC / DC converter 18, 19 Mounting component 20 Terminal attaching part 21, 22 Metal plate 24 Screw 26 Electromagnetic wave shielding plate

Claims (3)

複数のプリント基板を互いに対面させて並べ、各プリント基板の端縁部に実装部品の端子取付部を設け、各端子取付部に跨って帯状の金属板を掛け渡し、この金属板により各端子を電気的に接続したことを特徴とするプリント基板の接続構造。A plurality of printed circuit boards are arranged facing each other, and a terminal mounting portion of a mounting component is provided at the edge of each printed circuit board, and a strip-shaped metal plate is spanned across each terminal mounting portion, and each terminal is connected by this metal plate. A printed circuit board connection structure characterized by electrical connection. 上記金属板には、所定箇所に透孔が形成され、この透孔にネジを挿通して、上記プリント基板の端子取付部に上記金属板をネジ止めすることを特徴とする請求項１記載のプリント基板の接続構造。2. The metal plate according to claim 1, wherein a through hole is formed in a predetermined position of the metal plate, and a screw is inserted into the through hole, and the metal plate is screwed to a terminal mounting portion of the printed circuit board. PCB connection structure. 対面して並べた各プリント基板間に、電磁波遮蔽板を配置し、各プリント基板間のノイズを遮蔽したことを特徴とする請求項１記載のプリント基板。The printed circuit board according to claim 1, wherein an electromagnetic wave shielding plate is disposed between the printed circuit boards arranged to face each other to shield noise between the printed circuit boards.
JP2001248778A 2001-08-20 2001-08-20 PCB connection structure Expired - Fee Related JP3780186B2 (en)

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JP3780186B2 true JP3780186B2 (en) 2006-05-31

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JP4153951B2 (en) * 2003-04-17 2008-09-24 松下電器産業株式会社 Thin display device and plasma display
US9655270B2 (en) 2012-10-22 2017-05-16 Mitsubishi Electric Corporation Electronic device and electromagnetic noise control method
US9362840B2 (en) 2012-10-23 2016-06-07 Mitsubishi Electric Corporation Power conversion device

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