JPH0282695A - I/o cable accommodating device - Google Patents
I/o cable accommodating deviceInfo
- Publication number
- JPH0282695A JPH0282695A JP23586688A JP23586688A JPH0282695A JP H0282695 A JPH0282695 A JP H0282695A JP 23586688 A JP23586688 A JP 23586688A JP 23586688 A JP23586688 A JP 23586688A JP H0282695 A JPH0282695 A JP H0282695A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- housing
- grounded
- electromagnetic wave
- shield
- 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.)
- Pending
Links
- 230000004308 accommodation Effects 0.000 claims description 5
- 230000001902 propagating effect Effects 0.000 abstract description 6
- 239000004020 conductor Substances 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、輻射による他装置への電磁波妨害に対する
対策を施したＩ／Ｏケーブル収容装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an I/O cable accommodation device that takes measures against electromagnetic wave interference to other devices due to radiation.
第４図は従来のＩ／Ｏケーブルを収容する装置の断面図
であり、図中１１はＩ／Ｏボート、１２は筺体、１３は
Ｉ／Ｏケーブル、１４は輻射電磁波である。FIG. 4 is a sectional view of a conventional device for accommodating an I/O cable, in which 11 is an I/O boat, 12 is a housing, 13 is an I/O cable, and 14 is a radiated electromagnetic wave.
次に輻射電磁波発生のメカニズムについて説明する。Ｉ
／Ｏケーブル１３は自装置と他装置を接続するためにＧ
ＮＤ間に電位差が生じ、筺体内部で発生した電磁波ノイ
ズがＩ／Ｏケーブル１３を伝搬して筺体１２外部で輻射
される（１４） 、この輻射電磁波１４が他装置に対し
、電磁波妨害を行う。Next, the mechanism of radiant electromagnetic wave generation will be explained. I
/O cable 13 connects the own device to other devices.
A potential difference is generated between N and D, and electromagnetic wave noise generated inside the housing propagates through the I/O cable 13 and is radiated outside the housing 12 (14). This radiated electromagnetic wave 14 causes electromagnetic wave interference to other devices.
従来のＩ／Ｏケーブルを収容する装置は以上のように構
成されているので、筺体内部で発生した電磁波ノイズが
Ｉ／Ｏケーブルを伝搬して輻射するという問題点があっ
た。Since the conventional device for accommodating an I/O cable is configured as described above, there is a problem in that electromagnetic noise generated inside the housing propagates through the I/O cable and is radiated.
この発明は上記の問題点を解消するためになされたもの
で、筺体内部で発生した電磁波ノイズが接続Ｉ／Ｏケー
ブルを伝搬して輻射することを抑制できるＩ／Ｏケーブ
ル収容装置を得ることを目的とする。This invention was made in order to solve the above problems, and aims to provide an I/O cable accommodation device that can suppress electromagnetic wave noise generated inside a housing from propagating through a connecting I/O cable and being radiated. purpose.
この発明にかかるＩ／Ｏケーブル収容装置は、Ｉ／Ｏケ
ーブルにシールドケーブルを採用し、このシールドケー
ブルのシールドを筺体出口で接地するようにしたもので
ある。The I/O cable accommodation device according to the present invention employs a shielded cable as the I/O cable, and the shield of the shielded cable is grounded at the outlet of the housing.
この発明においては、シールドケーブルのシールドを筺
体出口で接地したから、筺体内部で発生し、Ｉ／Ｏケー
ブルを伝搬する電磁波ノイズを筺体出口でカットするこ
とができる。In this invention, since the shield of the shielded cable is grounded at the housing exit, electromagnetic noise generated inside the housing and propagating through the I/O cable can be cut at the housing exit.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、ｌはＩ／Ｏケーブル外皮、２はＩ／Ｏ
ケーブルシールド、３は第１の導電プレート、４は第２
の導電プレート、５は装置筺体、６は伝搬電磁波ノイズ
である。In Figure 1, l is the I/O cable jacket, 2 is the I/O cable
Cable shield, 3 is the first conductive plate, 4 is the second
5 is a device housing, and 6 is a propagating electromagnetic wave noise.
次に作用について説明する。Next, the effect will be explained.
筺体５内部で発生した電磁波ノイズはＩ／Ｏケーブル１
．２を伝搬する（第１図（ｂｌの６参照）が、筺体出口
で、Ｉ／Ｏケーブルのシールド部２を露出させ、これを
第１．第２の導電プレート３，４で挟み込む、この時第
１の導電プレート３は筺体ＦＧに接地されている。これ
により、Ｉ／Ｏケーブルを伝搬する電磁波ノイズは、筺
体出口でグランドに落とされ、筺体内部に伝搬ノイズが
漏れない様にする。The electromagnetic noise generated inside the housing 5 is transmitted through the I/O cable 1.
．． At this time, the shield part 2 of the I/O cable is exposed at the exit of the case, and it is sandwiched between the first and second conductive plates 3 and 4. The first conductive plate 3 is grounded to the housing FG.Thereby, electromagnetic wave noise propagating through the I/O cable is grounded at the housing exit, thereby preventing propagated noise from leaking into the housing.
第２図は本発明の第２の実施例を示し、図において２は
Ｉ／Ｏケーブルのシールド部、３はアルミの銅テープ、
導電網等の導電物質、４は平編線、５は筺体ＦＧに接続
するターミナルであり、このターミナル５により筺体Ｆ
Ｃに接地される。FIG. 2 shows a second embodiment of the present invention, in which 2 is the shield part of the I/O cable, 3 is an aluminum copper tape,
A conductive material such as a conductive net, 4 is a plain braided wire, and 5 is a terminal connected to the housing FG.
Grounded to C.
上記第１の実施例では、導電プレートでＩ／Ｏケーブル
のシールド部を挟み込むことにより、Ｉ／Ｏケーブル伝
搬電磁波ノイズが装置外部に漏れることを防いだが、こ
の第２の実施例は、Ｉ／Ｏケーブルのシールド部２にア
ルミの銅テープ、導電網等の導電物質３を巻きつけるよ
うにしたものである。In the first embodiment described above, the I/O cable propagated electromagnetic wave noise was prevented from leaking to the outside of the device by sandwiching the shield part of the I/O cable between the conductive plates. A conductive substance 3 such as an aluminum copper tape or a conductive net is wrapped around the shield part 2 of the O-cable.
また第３図は本発明の第３の実施例を示し、この実施例
は第２の実施例の構成に加え、トロイダルコア７を併用
し、グランド効果を高めるようにしたものである。即ち
、目的とする周波数に適したトロイダルコア７を選ぶこ
とにより、その周波数におけるインピーダンスを高め、
目的とする高周波数成分を減衰させ、伝搬ノイズの漏れ
をより防止することができるものである。Further, FIG. 3 shows a third embodiment of the present invention, and in addition to the structure of the second embodiment, this embodiment also uses a toroidal core 7 to enhance the ground effect. That is, by selecting the toroidal core 7 suitable for the target frequency, the impedance at that frequency is increased,
It is possible to attenuate the target high frequency component and further prevent leakage of propagation noise.
以上のように、この発明によればＩ／Ｏケーブルにシー
ルドケーブルを採用し、このＩ／Ｏケーブルのシールド
を筺体出口で接地するようにしたので、装置構成の大幅
な改造をせずに、装置内部の電磁波ノイズがＩ／Ｏケー
ブルを伝搬して装置外部に漏れるのを防ぐことができる
等の効果がある。As described above, according to the present invention, a shielded cable is used as an I/O cable, and the shield of this I/O cable is grounded at the outlet of the case, so that the device configuration can be easily modified without major modification. This has effects such as being able to prevent electromagnetic wave noise inside the device from propagating through the I/O cable and leaking to the outside of the device.
第１図は本発明の一実施例によるＩ／Ｏケーブル収容装
置を示す図、第２図は本発明の第２の実施例を示す図、
第３図は本発明の第３の実施例を示す図、第４図は従来
の装置の構成図である。
１１はＩ／Ｏボート、１２は装置筺体、１３はＩ／Ｏケ
ーブル、１４は輻射電磁波、１はＩ／Ｏケーブル外皮、
２はＩ／Ｏケーブルシールド部、３は第１の導電プレー
ト、４は第２の導電プレート、５は筺体、６は伝搬ノイ
ズ、３は導電性物質、４は平編線、５は筺体ＦＣにつな
がるターミナル、７はトロイダル・コアである。
なお図中同一符号は同−又は相当部分を示す。FIG. 1 is a diagram showing an I/O cable accommodation device according to an embodiment of the present invention, FIG. 2 is a diagram showing a second embodiment of the present invention,
FIG. 3 is a diagram showing a third embodiment of the present invention, and FIG. 4 is a configuration diagram of a conventional device. 11 is an I/O boat, 12 is a device housing, 13 is an I/O cable, 14 is a radiated electromagnetic wave, 1 is an I/O cable jacket,
2 is an I/O cable shield part, 3 is a first conductive plate, 4 is a second conductive plate, 5 is a housing, 6 is a propagation noise, 3 is a conductive material, 4 is a plain braided wire, 5 is a housing FC The terminal connected to , 7 is the toroidal core. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
ケーブルにシールドケーブルを採用し、このシールドを
筺体出口で接地するようにしたことを特徴とするＩ／Ｏ
ケーブル収容装置。(1) In a device that accommodates an I/O cable, the I/O
An I/O device characterized in that a shielded cable is used for the cable, and the shield is grounded at the exit of the case.
Cable accommodation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23586688A JPH0282695A (en) | 1988-09-20 | 1988-09-20 | I/o cable accommodating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23586688A JPH0282695A (en) | 1988-09-20 | 1988-09-20 | I/o cable accommodating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0282695A true JPH0282695A (en) | 1990-03-23 |
Family
ID=16992411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23586688A Pending JPH0282695A (en) | 1988-09-20 | 1988-09-20 | I/o cable accommodating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0282695A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04203077A (en) * | 1990-11-30 | 1992-07-23 | Tomoe Corp | Electromagnetic wave shield construction of electric cable |
| US5170008A (en) * | 1991-08-29 | 1992-12-08 | International Business Machines Corp. | External cable grommet for cable entry of EMI protected cabinets |
-
1988
- 1988-09-20 JP JP23586688A patent/JPH0282695A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04203077A (en) * | 1990-11-30 | 1992-07-23 | Tomoe Corp | Electromagnetic wave shield construction of electric cable |
| US5170008A (en) * | 1991-08-29 | 1992-12-08 | International Business Machines Corp. | External cable grommet for cable entry of EMI protected cabinets |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5349133A (en) | Magnetic and electric field shield | |
| US4506235A (en) | EMI Protected cable, with controlled symmetrical/asymmetrical mode attenuation | |
| US4871883A (en) | Electro-magnetic shielding | |
| US3219951A (en) | Interference attenuating power conductor utilizing intensified skin effect to attenuate high frequencies | |
| JP2972305B2 (en) | Electromagnetic shielding body and enclosure for electromagnetic shielding | |
| JPH0946080A (en) | Shielding of electronic equipment | |
| JPH0282695A (en) | I/o cable accommodating device | |
| JPH1140973A (en) | Wire mesh for electromagnetic shield | |
| KR970001779Y1 (en) | Electromagnetic wave shield type circuit unit | |
| JPH1187977A (en) | Electrical circuit constitution arranged in casing | |
| JPS6334578B2 (en) | ||
| JP2912130B2 (en) | Electromagnetic shielding structure for cable | |
| JPH04116999A (en) | Electromagnetic shielding enclosure | |
| JP2662110B2 (en) | Electromagnetic wave leakage prevention structure | |
| JPS61214805A (en) | Microwave antenna system | |
| JP3278648B2 (en) | Enclosure for electromagnetic shielding | |
| JP3470667B2 (en) | Electronic devices and connectors used for them | |
| JPH01248699A (en) | Electromagnetic wave shielding body | |
| JPS61176080A (en) | Connection of signal cable with shield | |
| JPH07183686A (en) | Electromagnetic interference preventing structure | |
| JPS5986901A (en) | Microwave device | |
| JPH09102692A (en) | Shield box | |
| JPS6161499B2 (en) | ||
| JPH10126190A (en) | Filter circuit for emi | |
| JPH02147988A (en) | Penetration |