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JP2611335B2 - Electromagnetic wave shielding structure of electronic device housing - Google Patents

Electromagnetic wave shielding structure of electronic device housing

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Publication number
JP2611335B2
JP2611335B2 JP63143765A JP14376588A JP2611335B2 JP 2611335 B2 JP2611335 B2 JP 2611335B2 JP 63143765 A JP63143765 A JP 63143765A JP 14376588 A JP14376588 A JP 14376588A JP 2611335 B2 JP2611335 B2 JP 2611335B2
Authority
JP
Japan
Prior art keywords
lid
electromagnetic wave
shielding means
box
housing
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 - Lifetime
Application number
JP63143765A
Other languages
Japanese (ja)
Other versions
JPH022000A (en
Inventor
潔 橋爪
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP63143765A priority Critical patent/JP2611335B2/en
Publication of JPH022000A publication Critical patent/JPH022000A/en
Application granted granted Critical
Publication of JP2611335B2 publication Critical patent/JP2611335B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Accessory Devices And Overall Control Thereof (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は電子計算機、画像記録・形成・読取・伝送装
置、その他の電子装置用筐体の電磁波遮蔽構造に関す
る。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding structure of an electronic computer, an image recording / forming / reading / transmitting device, and a housing for other electronic devices.

従来の技術 例えば、電子写真技術を利用したプリンタ装置におい
ては、一様に帯電した感光体ドラム表面を露光してプリ
ントすべき画像データに応じた静電潜像を形成し、この
静電潜像をトナー等で現像した後に用紙に転写し、これ
を熱等により定着した所望の画像を得ている。
2. Description of the Related Art For example, in a printer device using an electrophotographic technique, a uniformly charged photosensitive drum surface is exposed to form an electrostatic latent image corresponding to image data to be printed, and this electrostatic latent image is formed. Is developed with toner or the like, and then transferred to a sheet, which is fixed by heat or the like to obtain a desired image.

このような画像記録装置においては、上記のような処
理を行うため、感光体ドラムを中心として帯電コロトロ
ン、レーザーヘッド、転写コロトロン等が設けられ、そ
の他に用紙搬送装置、制御装置、電源装置等の装置が設
けられており、例えば、コロトロンによるコロナ放電や
レーザー光発振により、あるいは制御装置、電源装置、
モータ等から様々な電磁波が放射される。
In such an image recording apparatus, a charging corotron, a laser head, a transfer corotron and the like are provided around the photosensitive drum in order to perform the above-described processing, and other components such as a paper transport device, a control device, and a power supply device are provided. A device is provided, for example, by corona discharge or laser light oscillation by a corotron, or a control device, a power supply device,
Various electromagnetic waves are emitted from a motor or the like.

この電磁波は例えば、近くにTVやラジオ等があった場
合にこれに妨害を与え、TV画像を乱したり、雑音を発生
せしめたりするため、あるいは隣設された他の装置等が
発生した電磁波の影響で自身が誤動作したりするため、
装置外部への電磁波の漏洩、あるいは内部への進入を遮
蔽しなければならない。
This electromagnetic wave interferes with, for example, a nearby TV or radio, etc., to disturb the TV image or generate noise, or to generate electromagnetic waves generated by another device adjacent to the TV. May malfunction due to the influence of
Leakage of electromagnetic waves to the outside of the device or entry into the inside must be shielded.

この遮蔽を完全に行うためには、理想的には金属等の
遮蔽効果のある部材で装置を完全に覆うことが望ましい
が、消耗品の交換、詰まった用紙の除去等のメンテナン
スのため、装置を収納する筐体には開閉可能な扉、ある
いは蓋を取付けて構成する必要がある。
In order to completely perform this shielding, it is ideally desirable to completely cover the apparatus with a member having a shielding effect such as metal. However, the apparatus is required for maintenance such as replacement of consumables and removal of jammed paper. It is necessary to attach and open a door or a lid that can be opened and closed to the housing that stores the.

これにより、筐体と扉あるいは蓋との接合部に隙間が
でき、遮蔽が不完全になるため、第11図に示すようなベ
リリウム銅からなるスティックフィンガー10や、あるい
は第12図に示すようなカーボンを含有するシリコンゴム
等からなるカーボンラバー12を、第13図に示すように、
箱体14と蓋体16との接合部に貼着し、蓋体16を閉じたと
きに、箱体14と蓋体16との接合部の隙間を電磁的に密封
し、電磁波を遮蔽するようにしていた。(スティックフ
ィンガー、カーボンラバーは北川工業株式会社の商品名
である。) 発明が解決しようとする課題 しかし、上述のスティックフィンガーは1メートルあ
たり約二千円、カーボンラバー1メートルあたり約七百
円と高価であり、コスト的に問題があるとともに、構造
的にも、箱体と蓋体との位置関係や接合部分に高精度が
要求される等の問題があった。
As a result, a gap is formed at the joint between the housing and the door or the lid, and the shielding is incomplete.Therefore, the stick finger 10 made of beryllium copper as shown in FIG. 11, or as shown in FIG. As shown in FIG. 13, carbon rubber 12 made of silicon rubber or the like containing carbon,
Affixed to the junction between the box 14 and the lid 16 and when the lid 16 is closed, the gap between the junction between the box 14 and the lid 16 is electromagnetically sealed to shield electromagnetic waves. I was (Stick finger and carbon rubber are trade names of Kitagawa Industry Co., Ltd.) Problems to be Solved by the Invention However, the above-mentioned stick finger costs about 2,000 yen per meter and about 700 yen per meter of carbon rubber. In addition to being expensive and having a problem in terms of cost, there is also a problem in terms of structure that high precision is required in the positional relationship between the box and the lid and in the joint.

本発明はこのような点に鑑みてなされたものであり、
その目的とするところは、製造コストを安くすることの
できる電子装置筐体の電磁波遮蔽構造を提供することで
ある。
The present invention has been made in view of such a point,
An object of the present invention is to provide an electromagnetic wave shielding structure of an electronic device housing that can reduce manufacturing costs.

課題を解決するための手段 第1図乃至第3図は本発明の原理構成説明図である。
20は複数の針状導電部材22を並設し、この複数の針状導
電部材22の一端部側を固着部材24により固着してブラシ
状に形成した遮蔽手段である(第2図及び第3図参
照)。
Means for Solving the Problems FIGS. 1 to 3 are explanatory diagrams of the principle configuration of the present invention.
Reference numeral 20 denotes a shielding means in which a plurality of needle-shaped conductive members 22 are arranged in parallel, and one end side of each of the plurality of needle-shaped conductive members 22 is fixed by a fixing member 24 to form a brush (see FIGS. 2 and 3). See figure).

26は電子装置筐体を構成する箱体、28は箱体26に開閉
可能に設けられた蓋体である。ブラシ状の遮蔽手段20の
固着部材24側を、蓋体28の箱体26との接合部に取付け、
蓋体28を閉じたときに、遮蔽手段20の針状導電部材22先
端部が、箱体26に接触して、箱体26と蓋体28の接合部の
隙間を電磁的に密封するように構成する(第1図参
照)。
Reference numeral 26 denotes a box constituting the housing of the electronic device, and reference numeral 28 denotes a lid provided on the box 26 so as to be openable and closable. The fixing member 24 side of the brush-shaped shielding means 20 is attached to the joint of the lid 28 and the box 26,
When the lid 28 is closed, the tip of the needle-shaped conductive member 22 of the shielding means 20 comes into contact with the box 26 so as to electromagnetically seal the gap between the joint of the box 26 and the lid 28. (See FIG. 1).

尚、ブラシ状の遮蔽手段20は蓋体28でなく箱体26に取
付けてもよい。
The brush-shaped shielding means 20 may be attached to the box 26 instead of the lid 28.

作用 第4図及び第5図は本発明者等が電子写真式プリンタ
装置を用いて、漏洩電磁波の測定をした結果を示す図で
あり、第4図は遮蔽対策無しの筐体の、第5図は本発明
による電磁波遮蔽構造をとる筐体の測定結果である。
尚、測定方法は国際無線障害特別委員会の規定に準拠し
て行っている。
Operation FIGS. 4 and 5 are diagrams showing the results of measurement of leakage electromagnetic waves by the present inventors using an electrophotographic printer, and FIG. The figure shows a measurement result of a casing having an electromagnetic wave shielding structure according to the present invention.
The measurement was performed in accordance with the rules of the International Commission on Radio Interference.

縦軸はゲイン(dB)、横軸は周波数(MHz)であり、
図中点線Aは上記委員会による規制値、点線Bは本発明
者等が設定した規制値である。
The vertical axis is the gain (dB), the horizontal axis is the frequency (MHz),
In the figure, the dotted line A is the regulation value set by the committee, and the dotted line B is the regulation value set by the present inventors.

遮蔽対策無しの場合(第4図)、150MHz近傍で規制値
をオーバーしているため、この筐体には遮蔽対策を施す
必要が認められる。この筐体に本発明構造を適用すると
(第5図)、全体的に漏洩電磁波のゲインが減少すると
ともに、150MHz近傍ではゲインの減少が顕著に表れ、規
制値を大きく下まわっている。
In the case where there is no shielding measure (FIG. 4), the regulation value is exceeded in the vicinity of 150 MHz. When the structure of the present invention is applied to this housing (FIG. 5), the gain of the leaked electromagnetic wave is reduced as a whole, and the gain is significantly reduced around 150 MHz, which is much lower than the regulation value.

参考までに、第6図にスティックフィンガーを用いた
筐体の、第7図にカーボンラバーを用いた筐体の同様の
測定結果を示す。本発明による筐体は、これらとほぼ同
等の遮蔽効果を有することがわかる。
For reference, FIG. 6 shows a similar measurement result of a case using a stick finger, and FIG. 7 shows a similar measurement result of a case using a carbon rubber. It can be seen that the casing according to the present invention has almost the same shielding effect.

このように、本発明を適用して構成した筐体は、ステ
ィックフィンガー、あるいはカーボンラバーを用いた筐
体と同等の遮蔽効果を得ることができ、更に、本発明に
用いたブラシ状の遮蔽手段は1メートルあたり約四百円
であり、これにより安価な筐体を提供できる。
As described above, the housing configured by applying the present invention can obtain the same shielding effect as the housing using the stick finger or the carbon rubber, and furthermore, the brush-shaped shielding means used in the present invention. Is about four hundred yen per meter, so that an inexpensive housing can be provided.

また、第1図からもわかるように、遮蔽手段の針状部
材の先端部が弾性変形して箱体あるいは蓋体に接触し、
電磁的に密封するから、蓋体を閉じたときの箱体と蓋体
との相対位置にそれぼど厳密な精度を必要とせず、この
点からもコストの低減を図ることができる。
Also, as can be seen from FIG. 1, the tip of the needle-shaped member of the shielding means is elastically deformed and comes into contact with the box or the lid,
Since it is electromagnetically sealed, the relative position between the box and the cover when the cover is closed does not require strict accuracy, and the cost can be reduced from this point as well.

実 施 例 以下本発明の実施例を図面を参照して説明することに
する。
Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

第8図は本発明構造を適用した筐体を用いてなる電子
写真式プリンタ装置の外観斜視図である。このプリンタ
装置は、感光体ドラムを中心に、帯電装置、露光装置、
現像装置、転写装置等が設けられ、この他に定着装置、
記録紙搬送装置、電源装置、制御装置等により構成され
ている。
FIG. 8 is an external perspective view of an electrophotographic printer using a housing to which the structure of the present invention is applied. This printer device includes a photoconductor drum, a charging device, an exposure device,
A developing device, a transfer device, and the like are provided.
It comprises a recording paper transport device, a power supply device, a control device and the like.

内部処理の概略を説明すると、感光体ドラムの表面は
帯電装置により一様に帯電され、LEDヘッドやレーザー
ヘッド等の露光装置によりプリントすべき画像データに
応じて静電潜像が形成された後、この静電潜像が現像装
置によりトナーで現像される。
To explain the outline of the internal processing, the surface of the photosensitive drum is uniformly charged by a charging device, and after an electrostatic latent image is formed according to image data to be printed by an exposure device such as an LED head or a laser head. The electrostatic latent image is developed with toner by a developing device.

一方、記録紙は箱体30側の引き出し可能なトレイ32に
積層載置されており、この記録紙は、搬送装置により感
光体ドラムの回転に同期して送られ、転写装置により記
録紙上にトナー像が転写され、その後定着装置により定
着されて、蓋体34足に設けられた排出トレイ36に排出さ
れるようになっている。
On the other hand, recording paper is stacked and placed on a tray 32 which can be pulled out of the box 30 side. This recording paper is sent in synchronization with the rotation of the photosensitive drum by the transport device, and the toner is transferred onto the recording paper by the transfer device. The image is transferred, then fixed by a fixing device, and discharged onto a discharge tray 36 provided on the foot of the lid 34.

第9図は第8図は後方を見た斜視図である。蓋体34は
箱体30にC部で回動可能に支承されており、蓋体34を開
くことにより、感光体ドラムの交換や、詰まった記録紙
の除去等のメンテナンスを行うことができるようになっ
ている。さらに、蓋体34の背面には同じくメンテナンス
等のために、扉38が開閉可能に設けられている。38aは
扉38に形成された通気口、38bは扉38開閉のための把手
である。
FIG. 9 is a perspective view of FIG. 8 as viewed from the rear. The cover 34 is rotatably supported by the box 30 at the portion C, and by opening the cover 34, maintenance such as replacement of the photosensitive drum and removal of jammed recording paper can be performed. It has become. Further, a door 38 is provided on the rear surface of the lid 34 so as to be openable and closable for maintenance and the like. 38a is a vent formed in the door 38, and 38b is a handle for opening and closing the door 38.

このように、内部に設けられた各種装置のメンテナン
ス等のため、筐体は開閉可能な蓋体や扉が設けられて構
成されており、このため、運転中に装置内部の各種装置
により放射される電磁波が蓋体や扉の接合部から外へ漏
洩し、隣接する装置に影響を与える(例えばTV画像を乱
す等)ため、ブラシ状に形成された遮蔽手段40を、箱体
30と蓋体34と接合部(支承側Cを含む4辺)及び蓋体34
と扉38との接合部(同じく支承側Dを含む4辺)に取付
けてある。
Thus, for maintenance of various devices provided inside, the housing is configured to be provided with an openable / closable lid and a door, and therefore, is radiated by various devices inside the device during operation. Electromagnetic wave leaks out of the joint of the lid and the door and affects adjacent devices (for example, disturbs TV images).
30 and lid 34 and joint (4 sides including bearing side C) and lid 34
And the door 38 (also on the four sides including the bearing side D).

これにより、蓋体あるいは扉を閉じたときに各接合部
が電磁的に遮蔽され、外部への電磁波の放射、及び外部
からの電磁波の進入を防止することができる。
Thereby, when the lid or the door is closed, each joint is electromagnetically shielded, so that the radiation of electromagnetic waves to the outside and the entry of electromagnetic waves from the outside can be prevented.

本実施例に用いたブラシ状の遮蔽手段は、第10図に示
すように、複数の導電性を有する針状部材42の一端部側
の一面を粘着剤付きアルミテープ44で、他面を両面テー
プ46の一面で接着し、両面テープ46の他面を蓋体あるい
は扉の接合部に貼着するような構成で、そのコストは1
メートルあたり約四百円であり、従来の遮蔽手段よりも
格段に安価である。
As shown in FIG. 10, the brush-like shielding means used in the present embodiment has a plurality of conductive needle-shaped members 42 on one end side with an adhesive-applied aluminum tape 44 and the other side with a double-sided surface. Adhesive is applied on one side of the tape 46 and the other side of the double-sided tape 46 is attached to the joint of the lid or the door.
It costs about 400 yen per meter and is much cheaper than conventional shielding means.

発明の効果 本発明は以上詳述したように、開閉可能な蓋や扉を設
けて構成した筐体の各接合部にブラシ状の遮蔽手段を取
付け、これにより蓋や扉を閉じたときの隙間を電磁的に
密封するようにしてあり、遮蔽手段が安価であるととも
に、蓋や扉の取付け等に高い精度を必要とせず、製造原
価が安く、遮蔽効果の高い電子装置の筐体を提供できる
という効果を奏する。
Effect of the Invention As described in detail above, the present invention attaches a brush-like shielding means to each joint of a housing provided with an openable and closable lid and a door, and thereby a gap when the lid and the door are closed. Is electromagnetically sealed, the shielding means is inexpensive, a high precision is not required for attaching the lid or the door, the manufacturing cost is low, and a housing of the electronic device with a high shielding effect can be provided. This has the effect.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明の原理構成図、 第2図は本発明に用いたブラシ状の遮蔽手段の平面図、 第3図は第2図の側面図、 第4図は遮蔽対策を施していない筐体の電磁波測定結果
を示す図、 第5図は本発明構造を適用した筐体の電磁波測定結果を
示す図、 第6図及び第7図は従来の遮蔽対策を施した筐体の電磁
波測定結果を示す図、 第8図及び第9図は本発明一実施例を説明するための正
面側斜視図及び背面側斜視図、 第10図は本発明一実施例に用いたブラシ状遮蔽手段の斜
視図、 第11図乃至第13図は従来技術の説明図である。 20……ブラシ状遮蔽手段、 22……針状部材、 24……固着部材、 26……箱体、 28……蓋体。
1 is a diagram showing the principle of the present invention, FIG. 2 is a plan view of a brush-like shielding means used in the present invention, FIG. 3 is a side view of FIG. 2, and FIG. FIG. 5 shows the results of electromagnetic wave measurement of the housing, FIG. 5 shows the results of electromagnetic wave measurement of the housing to which the structure of the present invention is applied, and FIGS. 6 and 7 show the electromagnetic wave measurement of the housing with conventional shielding measures. FIG. 8 and FIG. 9 are front perspective views and rear perspective views for explaining one embodiment of the present invention. FIG. 10 is a view showing a brush-like shielding means used in one embodiment of the present invention. FIG. 11 is a perspective view, and FIG. 11 to FIG. 20: brush-shaped shielding means, 22: needle-like member, 24: fixing member, 26: box, 28: lid.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】箱体に開閉可能に蓋体を設けてなる電子装
置の筐体において、 複数の針状導電部材を並設し、該複数の針状導電部材の
一端部側を、粘着剤付き導電性テープと両面テープの一
方の接着面で挟持することにより一体化してブラシ状の
遮蔽手段を形成し、前記箱体と蓋体との接合部のどちら
か一方に該遮蔽手段を、該両面テープの他方の接着面で
接着することにより取付け、蓋体を閉じたときに遮蔽手
段の針状導電部材先端部が、箱体と蓋体の遮蔽手段を取
付ていない他方に接触するようにしたことを特徴とする
電子装置筐体の電磁波遮蔽構造。
1. A housing for an electronic device comprising a box body provided with an openable and closable lid, a plurality of needle-like conductive members arranged in parallel, and one end side of the plurality of needle-like conductive members is provided with an adhesive. With the conductive tape and the double-sided tape sandwiched together by one of the adhesive surfaces to form a brush-like shielding means, the shielding means at one of the joints of the box and the lid, It is attached by bonding with the other adhesive surface of the double-sided tape, so that when the lid is closed, the tip of the needle-shaped conductive member of the shielding means contacts the other of the box and the lid where the shielding means is not attached. An electromagnetic wave shielding structure for an electronic device housing, characterized in that:
JP63143765A 1988-06-13 1988-06-13 Electromagnetic wave shielding structure of electronic device housing Expired - Lifetime JP2611335B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63143765A JP2611335B2 (en) 1988-06-13 1988-06-13 Electromagnetic wave shielding structure of electronic device housing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63143765A JP2611335B2 (en) 1988-06-13 1988-06-13 Electromagnetic wave shielding structure of electronic device housing

Publications (2)

Publication Number Publication Date
JPH022000A JPH022000A (en) 1990-01-08
JP2611335B2 true JP2611335B2 (en) 1997-05-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
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KR100369919B1 (en) 1999-03-03 2003-01-29 미쓰비시덴키 가부시키가이샤 Fan, a method of molding molden metal for fan, and a device or molding molden metal for fan
JP4108310B2 (en) 2001-09-28 2008-06-25 富士通株式会社 Method for manufacturing semiconductor device having silicon-containing insulating film
JP4374897B2 (en) 2003-05-12 2009-12-02 株式会社日立製作所 Axial fan

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