JP3687012B2 - PCB grounding structure - Google Patents

PCB grounding structure Download PDF

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Publication number
JP3687012B2
JP3687012B2 JP35314195A JP35314195A JP3687012B2 JP 3687012 B2 JP3687012 B2 JP 3687012B2 JP 35314195 A JP35314195 A JP 35314195A JP 35314195 A JP35314195 A JP 35314195A JP 3687012 B2 JP3687012 B2 JP 3687012B2
Authority
JP
Japan
Prior art keywords
printed circuit
circuit board
connector
terminal
ground
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
Application number
JP35314195A
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Japanese (ja)
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JPH09186472A (en
Inventor
幸直 谷
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
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 Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to JP35314195A priority Critical patent/JP3687012B2/en
Publication of JPH09186472A publication Critical patent/JPH09186472A/en
Application granted granted Critical
Publication of JP3687012B2 publication Critical patent/JP3687012B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【０００１】
【発明の属する技術分野】
本発明は、ケース内に収納されたプリント基板のアース構造に関するものである。
【０００２】
【従来の技術】
従来のプリント基板のアース構造は図６に示すように構成されている。図示しないケース内に複数枚のプリント基板１６が収納され、このプリント基板１６の板面には複数の電子部品（図示せず）が設けられ、電子部品相互をプリント配線により接続してある。前記プリント基板１６の前面にコネクタ１７が取付けられ、このコネクタのアース接続端子（図示せず）に接続したフレームグランドパターン１８がプリント基板１６の前面側部を通り、さらにプリント基板内を通って後面にプリント配線され、プリント基板１６の後面に設けた端子１９をプリント基板１６の後方に設けたマザーボード２０の端子２１に接続し、この端子２１をアース線２２に接続して大地に接地していた。
【０００３】
【発明が解決しようとする課題】
ところで、従来のプリント基板１６のアース構造は、フレームグランドパターン１８がプリント基板内を通るため、プリント基板１６のプリント配線回路に近接し、フレームグランドパターン１８から発生するノイズが前記プリント配線回路に大きく影響し、プリント基板１６の耐ノイズ性を低下させるという問題があった。
そこで、本発明はプリント基板の耐ノイズ性を向上させるプリント基板のアース構造を提供することを目的とする。
【０００４】
【課題を解決するための手段】
本発明は上記問題を解決するために、ケース内に収納したプリント基板にコネクタを取付け、前記コネクタのアース接続端子に接続した前記プリント基板のフレームグランドパターンをケースのフレームに接続してアースするプリント基板のアース構造において、前記コネクタを、プリント基板の前面に取付けるとともに、前記フレームグランドパターンを前記コネクタのアース接続端子に接続してプリント基板の前面の側部のみに配線し、さらに、端子金具をフレームグランドパターンの一端に接続して前記プリント基板の前面の側部に固定し、前記端子金具をアース線に接続するようにしている。
【０００５】
【発明の実施の形態】
以下、本発明の実施例を図に基づいて説明する。
図１は本発明の第１の実施例を示すケースの斜視図である。図２は、本発明のケースを省いたプリント基板のアース構造の斜視図である。
１はケースで、側面および上面に風穴２が設けられ、前面には外部からの接続端子を挿入する穴３が設けられている。このケース１内にはプリント基板４が収納され、板面には図示しない電子部品が取付けられて、電子部品相互をプリント配線により接続してある。５は前記プリント基板４の前面側部に取付けたコネクタで、外部機器に接続する電線のコネクタ５Ａが嵌合するようにしてある。６は前記プリント基板４の前面側部にプリント配線したフレームグランドパターンで、その一端を前記コネクタ５のアース線に接続し、プリント基板の前面の側部のみに配線してある。７はそれぞれのプリント基板４に取付けた端子金具で、前記フレームグランドパターン６の一端に接続してある。この端子金具７にはタップが設けられ、相隣るプリント基板４の端子金具７のタップにアースプレート８をネジ９により締め付けて端子金具相互を接続してアース線１０を介して大地に接地してある。
図３は本発明の第２の実施例を示すアース構造の要部の斜視図で、電線１１の両端に圧着端子１２を取付け、端子金具７にネジ締め固定するようにしてある。
図４は本発明の第３の実施例を示すアース構造の要部の斜視図で、端子金具７の相互をストラップ導体１３で接続するようにしてある。
図５は本発明の第３の実施例を示すアース構造の要部の斜視図で、電線１１の両端に挿入型端子１４を取付け、プリント基板のフレームグランドパターンに接続固定したタブ端子１５に接続するようにしてある。
また、実施例ではケース内に複数のプリント基板を収納した場合について説明したが、１枚収納した場合もでもよい。この場合にはアースプレートは設ける必要はない。
【０００６】
【発明の効果】
以上述べたように、本発明によれば、プリント基板の前面側部のみにフレームグランドパターンを配線したので、フレームグランドパターンから発生するノイズがプリント基板のプリント配線回路にほとんど影響することがなく、したがってプリント基板の耐ノイズ性を向上させることができる。
【図面の簡単な説明】
【図１】 本発明の実施例を示すケースの斜視図である。
【図２】 本発明の実施例を示すケースを省いたプリント基板のアース構造の斜視図である。
【図３】 本発明の第２の実施例を示すアース構造の要部の斜視図である。
【図４】 本発明の第３の実施例を示すアース構造の要部の斜視図である。
【図５】 本発明の第４の実施例を示すアース構造の要部の斜視図である。
【図６】 従来のプリント基板のアース構造の斜視図である。
【符号の説明】
１ ケース、 ２ 風穴、 ３ 穴、 ４ プリント基板、 ５ コネクタ、
６ フレームグランドパターン、 ７ 端子金具、 ８ アースプレート、
９ ネジ、 １０ アース線、 １１ 電線、 １２ 圧着端子、
１３ ストラップ導体、 １４ 挿入型端子、 １５ タブ端子[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grounding structure for a printed circuit board housed in a case.
[0002]
[Prior art]
A conventional printed circuit board ground structure is configured as shown in FIG. A plurality of printed circuit boards 16 are housed in a case (not shown), and a plurality of electronic components (not shown) are provided on the plate surface of the printed circuit board 16, and the electronic components are connected to each other by printed wiring. A connector 17 is attached to the front surface of the printed circuit board 16, and a frame ground pattern 18 connected to a ground connection terminal (not shown) of the connector passes through the front side portion of the printed circuit board 16, further passes through the printed circuit board, and passes through the rear surface. The terminal 19 provided on the rear surface of the printed circuit board 16 is connected to the terminal 21 of the mother board 20 provided behind the printed circuit board 16, and the terminal 21 is connected to the ground wire 22 and grounded. .
[0003]
[Problems to be solved by the invention]
By the way, in the conventional ground structure of the printed circuit board 16, since the frame ground pattern 18 passes through the printed circuit board, it is close to the printed circuit of the printed circuit board 16, and noise generated from the frame ground pattern 18 is large in the printed circuit. There is a problem that the noise resistance of the printed circuit board 16 is lowered.
SUMMARY OF THE INVENTION An object of the present invention is to provide a printed circuit board ground structure that improves the noise resistance of the printed circuit board.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention attaches a connector to a printed circuit board housed in a case, and connects the frame ground pattern of the printed circuit board connected to the ground connection terminal of the connector to the frame of the case for grounding. In the grounding structure of the board, the connector is attached to the front surface of the printed circuit board, the frame ground pattern is connected to the ground connection terminal of the connector and wired only to the side of the front surface of the printed circuit board, It is connected to one end of the frame ground pattern and fixed to the front side of the printed circuit board, and the terminal fitting is connected to a ground wire.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a case showing a first embodiment of the present invention. FIG. 2 is a perspective view of the ground structure of the printed circuit board without the case of the present invention.
Reference numeral 1 denotes a case, in which air holes 2 are provided on the side surface and the upper surface, and holes 3 for inserting connection terminals from the outside are provided on the front surface. A printed circuit board 4 is accommodated in the case 1, electronic components (not shown) are attached to the plate surface, and the electronic components are connected to each other by printed wiring. Reference numeral 5 denotes a connector attached to the front side portion of the printed circuit board 4 so that a connector 5A of an electric wire connected to an external device is fitted therein. Reference numeral 6 denotes a frame ground pattern printed on the front side of the printed circuit board 4. One end of the frame ground pattern is connected to the ground wire of the connector 5 and wired only on the front side of the printed circuit board . Reference numeral 7 denotes a terminal fitting attached to each printed circuit board 4 and is connected to one end of the frame ground pattern 6. The terminal fitting 7 is provided with a tap, and a ground plate 8 is fastened to the tap of the terminal fitting 7 of the adjacent printed circuit board 4 with a screw 9 so that the terminal fittings are connected to each other and grounded through the ground wire 10. It is.
FIG. 3 is a perspective view of the main part of the ground structure showing a second embodiment of the present invention, wherein crimp terminals 12 are attached to both ends of the electric wire 11 and fixed to the terminal fitting 7 with screws.
FIG. 4 is a perspective view of the main part of the ground structure showing a third embodiment of the present invention, in which the terminal fittings 7 are connected to each other by the strap conductor 13.
FIG. 5 is a perspective view of an essential part of an earth structure showing a third embodiment of the present invention, in which insertion type terminals 14 are attached to both ends of an electric wire 11 and connected to a tab terminal 15 which is connected and fixed to a frame ground pattern of a printed circuit board. I have to do it.
In the embodiment, the case where a plurality of printed circuit boards are accommodated in the case has been described. In this case, it is not necessary to provide a ground plate.
[0006]
【The invention's effect】
As described above, according to the present invention, since the frame ground pattern is wired only on the front side portion of the printed circuit board, noise generated from the frame ground pattern hardly affects the printed wiring circuit of the printed circuit board. Therefore, the noise resistance of the printed circuit board can be improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a case showing an embodiment of the present invention.
FIG. 2 is a perspective view of a grounding structure of a printed board without a case showing an embodiment of the present invention.
FIG. 3 is a perspective view of a main part of an earth structure showing a second embodiment of the present invention.
FIG. 4 is a perspective view of an essential part of an earth structure showing a third embodiment of the present invention.
FIG. 5 is a perspective view of an essential part of an earth structure showing a fourth embodiment of the present invention.
FIG. 6 is a perspective view of a conventional ground structure of a printed circuit board.
[Explanation of symbols]
1 case, 2 air holes, 3 holes, 4 printed circuit board, 5 connectors,
6 Frame ground pattern, 7 Terminal bracket, 8 Ground plate,
9 Screw, 10 Ground wire, 11 Electric wire, 12 Crimp terminal,
13 Strap conductor, 14 Insertion type terminal, 15 Tab terminal

Claims (1)

ケース内に収納したプリント基板にコネクタを取付け、前記コネクタのアース接続端子と、このアース接続端子に接続した前記プリント基板のフレームグランドパターンを介して前記プリント基板をアースするプリント基板のアース構造において、
前記コネクタを、プリント基板の前面に取付けるとともに、前記フレームグランドパターンを前記コネクタのアース接続端子に接続してプリント基板の前面の側部のみに配線し、さらに、端子金具をフレームグランドパターンの一端に接続して前記プリント基板の前面の側部に固定し、前記端子金具をアース線に接続したこと特徴とするプリント基板のアース構造。In the printed circuit board grounding structure for attaching the connector to the printed circuit board housed in the case, and grounding the printed circuit board via the ground connection terminal of the connector and the frame ground pattern of the printed circuit board connected to the ground connection terminal,
The connector is attached to the front surface of the printed circuit board, the frame ground pattern is connected to the ground connection terminal of the connector and wired only to the front side of the printed circuit board, and the terminal fitting is attached to one end of the frame ground pattern. A grounding structure for a printed circuit board, wherein the printed circuit board is connected and fixed to a front side of the printed circuit board, and the terminal fitting is connected to a ground wire.
JP35314195A 1995-12-28 1995-12-28 PCB grounding structure Expired - Fee Related JP3687012B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP35314195A JP3687012B2 (en) 1995-12-28 1995-12-28 PCB grounding structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP35314195A JP3687012B2 (en) 1995-12-28 1995-12-28 PCB grounding structure

Publications (2)

Publication Number Publication Date
JPH09186472A JPH09186472A (en) 1997-07-15
JP3687012B2 true JP3687012B2 (en) 2005-08-24

Family

ID=18428840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP35314195A Expired - Fee Related JP3687012B2 (en) 1995-12-28 1995-12-28 PCB grounding structure

Country Status (1)

Country Link
JP (1) JP3687012B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000089851A (en) * 1998-09-09 2000-03-31 Matsushita Electric Ind Co Ltd Electronic equipment and extension unit

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JPH09186472A (en) 1997-07-15

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