JPS5843915B2 - Printed wiring board with shield case - Google Patents
Printed wiring board with shield caseInfo
- Publication number
- JPS5843915B2 JPS5843915B2 JP104377A JP104377A JPS5843915B2 JP S5843915 B2 JPS5843915 B2 JP S5843915B2 JP 104377 A JP104377 A JP 104377A JP 104377 A JP104377 A JP 104377A JP S5843915 B2 JPS5843915 B2 JP S5843915B2
- Authority
- JP
- Japan
- Prior art keywords
- wiring board
- printed wiring
- shield case
- shield
- case
- 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
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Structure Of Printed Boards (AREA)
Description
【発明の詳細な説明】 本発明はシールドケースを有する印刷配線板に関する。[Detailed description of the invention] The present invention relates to a printed wiring board having a shield case.
従来、電気回路相互間に電磁シールドが必要な場合には
それぞれの回路を個別の印刷配線板に構成してシールド
ケースに独立に収容する方法が一般的であり、そのため
に印刷配線板の使用枚数が多く装置構成が複雑化して装
置の小型化の支障となる上、使用部品数も増加し、部品
費、部品管理工数をも増加させるという欠点を有してい
た。Conventionally, when electromagnetic shielding is required between electrical circuits, the common method is to configure each circuit on a separate printed wiring board and house it independently in a shield case. This has the disadvantage of complicating the device configuration and hindering miniaturization of the device, and also increases the number of parts used, increasing parts costs and parts management man-hours.
本発明の目的は前述の欠点を除去したシールドケースを
有する印刷配線板を提供することになる。An object of the present invention is to provide a printed wiring board with a shield case that eliminates the above-mentioned drawbacks.
本発明の特徴は、一枚の印刷配線板に多くの電気回路を
構成させる必要があり、しかもいくつかの電気回路ブロ
ック相互間に電磁シールドが必要となる場合において、
印刷配線板に設けられた細長いスリット穴を利用してシ
ールドケースの表側部分と裏側部分が広範囲の部分で接
触する構造のシールドケースにより電磁シールド効果を
増した複数個の電気回路ブロックを構成ししかも複数個
のシールドケースを介してループ電流が流れることによ
りシールドケース相互間に電磁結合が生ずることのない
ように考慮された印刷配線板にある。A feature of the present invention is that when it is necessary to configure many electric circuits on one printed wiring board and electromagnetic shielding is required between several electric circuit blocks,
The shield case has a structure in which the front and back sides of the shield case are in contact with each other over a wide area by using long slit holes provided in the printed circuit board, and multiple electric circuit blocks are constructed with increased electromagnetic shielding effect. The printed wiring board is designed to prevent electromagnetic coupling between shield cases due to loop current flowing through a plurality of shield cases.
以下図面を参照しながら本発明の詳細な説明する。The present invention will be described in detail below with reference to the drawings.
第１図は一枚の両面印刷配線板上に２個のシールドケー
スを実装した場合の実施例、第２図は第１図の印刷配線
板の裏面を示す図である。FIG. 1 is an embodiment in which two shield cases are mounted on one double-sided printed wiring board, and FIG. 2 is a diagram showing the back side of the printed wiring board of FIG. 1.
１ａ。１ｂはそれぞれのシールドケースを構成するため
の表ブタ、２ａ 、２ｂはシールドケースの側面枠、３
は両面印刷配線板、４３〜４Ｊは印刷配線板に設けられ
たスリット穴、５ａ〜５には２ａおよび２ｂの取付穴、
６ａ、６ｂは裏ブタ、７，８は印刷配線板上の金属箔の
一部を示している。1a. 1b is a front cover for configuring each shield case, 2a and 2b are side frames of the shield case, and 3
is a double-sided printed wiring board, 43-4J are slit holes provided in the printed wiring board, 5a-5 are mounting holes 2a and 2b,
6a and 6b are back covers, and 7 and 8 are parts of the metal foil on the printed wiring board.
シールドケースの側面を構成し、ケースの枠となる２ａ
、２ｂは印刷配線板３上に設けられた５ａ〜５ｋを介
して半田付又はネジ止め等の機構により印刷配線板３に
固着される。2a constitutes the side of the shield case and serves as the frame of the case.
, 2b are fixed to the printed wiring board 3 via soldering, screwing, or other mechanisms via the pins 5a to 5k provided on the printed wiring board 3.
２ａは枠の内部に仕切り枠を有している場合である。2a is a case in which a partition frame is provided inside the frame.
１ａ、Ｉｂの表ブタは２ａ 、２ｂに対しスプリング、
ネジ止め等の機構により密着するような構造を有してお
り、上部の電磁シールド効果を確保している。The front pigs of 1a and Ib are springs for 2a and 2b,
It has a structure that allows it to fit tightly with a mechanism such as screwing, ensuring the electromagnetic shielding effect of the upper part.
６ａ、６ｂの裏ブタは印刷配線板３に設けられているス
リット穴４ａ〜４ｊを通過し、２ａ、２ｂに対しスプリ
ング、ネジ止め等の機構により密着するような構造を有
しており、下部の電磁シールド効果を確保する。The back covers of 6a and 6b pass through slit holes 4a to 4j provided in the printed wiring board 3, and have a structure in which they are tightly attached to 2a and 2b by mechanisms such as springs and screws, and the lower part ensure electromagnetic shielding effectiveness.
それ故、このシールドケース内に隔離された印刷配線板
上の電気回路は外部よりの有害な電磁結合の影響を受は
難くなるとともに、外部への有害な電磁放射も減少する
という利点を有している。Therefore, the electric circuit on the printed wiring board isolated within this shield case has the advantage that it is less susceptible to harmful electromagnetic coupling from the outside and that harmful electromagnetic radiation to the outside is also reduced. ing.
次に印刷配線板３の裏面の金属箔８は第２図に示すごと
く印刷配線板に設けられたスリット穴４ａ〜４ｊおよび
２ａ、２ｂを取付けるための取付穴５ａ〜５ｋをとり囲
むように配置され、とくに５ａ〜５ｋにおいて２ａ 、
２ｂと電気的に結合してシールドケース枠と同電位とな
るように構成される。Next, the metal foil 8 on the back surface of the printed wiring board 3 is arranged so as to surround the slit holes 4a to 4j provided in the printed wiring board and the mounting holes 5a to 5k for mounting 2a and 2b, as shown in FIG. 2a, especially in 5a to 5k,
2b and is configured to have the same potential as the shield case frame.
この電位は接地電位となるように内部又は外部の電気回
路に対して接続される。This potential is connected to an internal or external electrical circuit to be a ground potential.
金属箔８は第２図に示すごとくシールドケース周辺部以
外はできるだけ設けないようにし、シールド枠２ａ、２
ｂに対する接地電位の接続は両シールドケースを介して
ループ電流が流れ難くするために幅の広い１本の金属箔
により接続する。As shown in FIG. 2, the metal foil 8 is placed as little as possible outside the periphery of the shield case, and the shield frames 2a, 2
The connection of the ground potential to b is made by a single wide metal foil in order to make it difficult for loop current to flow through both shield cases.
これにより２つのシールドケースにループ電流が流れる
ことにより生ずる電磁結合量を低下できることになる。This makes it possible to reduce the amount of electromagnetic coupling caused by loop current flowing through the two shield cases.
７は電気回路を構成する印刷配線板表面の金属箔の一部
を示したものであり、７により両シールドケース内の回
路が接続されている。Reference numeral 7 shows a part of the metal foil on the surface of the printed wiring board constituting the electric circuit, and the circuits in both shield cases are connected by 7.
このように印刷配線板上の金属箔により、シールドケー
ス相互間の信号回路接続、外部よりシールドケース内電
気回路への電源の供給等の処置が手軽であり、従来のよ
うに貫通コンデンサ、マルチコネクタ等の接続端子が不
要となる上、配線工数も削減されるという利点も有して
いるのである。In this way, the metal foil on the printed wiring board makes it easy to connect signal circuits between shield cases and to supply power from the outside to the electric circuit inside the shield case, making it easy to connect feed-through capacitors and multi-connectors as in the past. This has the advantage of not only eliminating the need for connection terminals such as, but also reducing the number of wiring steps.
なお本発明は上述の実施例に限定されるものではなく、
例えば枠２ａ 、２ｂの一部が印刷配線板３のスリット
を通過して裏ブタと密着する構造としても発明の効果は
同一であり差しつかえない。Note that the present invention is not limited to the above-mentioned embodiments,
For example, the effect of the invention may be the same even if a part of the frames 2a and 2b passes through the slit of the printed wiring board 3 and comes into close contact with the back lid.
また、シールドケースの側面枠と族ブタを１体として、
作製することも可能である。In addition, the side frame of the shield case and the family pig are combined as one body,
It is also possible to create one.
第１図は本発明の実施例の印刷配線板とシールドケース
取付部分の斜視図、第２図はシールドケース相互間の接
地電位伝導用金属箔のみについて作画した状態の印刷配
線板の裏面図である。
１ａ、１ｂ・・・・・・シールドケースの族ブタ、２ａ
。
２ｂ・・・・・・シールドケースの側面枠、３・・・・
・・印刷配線板、４ａ〜４ｊ・・・・・・印刷配線板に
設けられたスリット穴、５３〜５ｋ・・・・・・シール
ドケースの側面枠を印刷配線板に固着するための穴、６
ａ、６ｂ・・・・・・シールドケースの裏ブタ、７・・
・・・・印刷配線板表面の金属箔の一部、８・・・・・
・印刷配線板裏面の金属箔の一部。Fig. 1 is a perspective view of the printed wiring board and the shield case mounting part of the embodiment of the present invention, and Fig. 2 is a back view of the printed wiring board in a state where only the metal foil for conducting ground potential between the shield cases is drawn. be. 1a, 1b...shield case pig, 2a
. 2b...Side frame of shield case, 3...
...Printed wiring board, 4a to 4j... Slit holes provided in the printed wiring board, 53 to 5k... Holes for fixing the side frame of the shield case to the printed wiring board, 6
a, 6b...Back cover of shield case, 7...
...Part of the metal foil on the surface of the printed wiring board, 8...
・Part of the metal foil on the back of the printed wiring board.
Claims (1)
線板において、前記配線板に固着させる機構を有しかつ
前記配線板に設けられた細長いスリット穴を通して前記
配線板の一部分を両面より包み込む構造の前記シールド
ケースを前記配線板に固着することを特徴とするシール
ドケースを有する印刷配線板。1. In a printed wiring board having a shield case for shielding an electric circuit, the shield has a mechanism to be fixed to the wiring board and has a structure that wraps a part of the wiring board from both sides through a long and narrow slit hole provided in the wiring board. A printed wiring board having a shield case, characterized in that the case is fixed to the wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP104377A JPS5843915B2 (en) | 1977-01-07 | 1977-01-07 | Printed wiring board with shield case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP104377A JPS5843915B2 (en) | 1977-01-07 | 1977-01-07 | Printed wiring board with shield case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5386467A JPS5386467A (en) | 1978-07-29 |
| JPS5843915B2 true JPS5843915B2 (en) | 1983-09-29 |
Family
ID=11490522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP104377A Expired JPS5843915B2 (en) | 1977-01-07 | 1977-01-07 | Printed wiring board with shield case |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5843915B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56154099U (en) * | 1980-04-11 | 1981-11-18 | ||
| JPS5895097U (en) * | 1981-12-21 | 1983-06-28 | 富士通株式会社 | Shield structure of printed board |
| JP5085771B1 (en) | 2011-06-30 | 2012-11-28 | 株式会社東芝 | Electronic equipment, printed circuit boards |
-
1977
- 1977-01-07 JP JP104377A patent/JPS5843915B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5386467A (en) | 1978-07-29 |
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