JP2002353639A - Image forming apparatus - Google Patents
Image forming apparatusInfo
- Publication number
- JP2002353639A JP2002353639A JP2001160656A JP2001160656A JP2002353639A JP 2002353639 A JP2002353639 A JP 2002353639A JP 2001160656 A JP2001160656 A JP 2001160656A JP 2001160656 A JP2001160656 A JP 2001160656A JP 2002353639 A JP2002353639 A JP 2002353639A
- Authority
- JP
- Japan
- Prior art keywords
- sheet metal
- housing
- metal bracket
- image forming
- forming apparatus
- 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.)
- Granted
Links
Landscapes
- Casings For Electric Apparatus (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Electrophotography Configuration And Component (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、レーザープリンタ
ー、複写機等の画像形成装置に用いられる制御基板の電
波シールド技術に関する。[0001] 1. Field of the Invention [0002] The present invention relates to a radio wave shielding technique for a control board used in an image forming apparatus such as a laser printer and a copying machine.
【０００２】[0002]
【従来の技術】従来の技術では、装置本体に対して着脱
可能な板金ブラケットに、画像形成装置をコントロール
するコントローラ基板等の制御部材などを取付け、制御
基板を板金筐体内に装着する際、板金筐体の開口部から
電波が漏洩しないように、板金ブラケットで筐体の開口
を閉止し、この板金ブラケットを小さいピッチで多数個
のビスでねじ止めしていた。そのため、ビスのねじ込
み、締め付けにかかる作業者の負担が大きかった。2. Description of the Related Art In the prior art, a control member such as a controller board for controlling an image forming apparatus is mounted on a sheet metal bracket which can be attached to and detached from an apparatus main body. In order to prevent radio waves from leaking from the opening of the case, the opening of the case was closed with a sheet metal bracket, and this sheet metal bracket was screwed at a small pitch with a number of screws. Therefore, the burden on the operator for screwing and tightening the screws was great.
【０００３】[0003]
【発明が解決しようとする課題】本発明はこのような板
金ブラケットの取付けのビス止めの手間を最小限に止め
ると共に、電波の漏洩を確実に防止することができるブ
ラケットを備えた画像形成装置を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention provides an image forming apparatus provided with a bracket which can minimize the trouble of screwing the sheet metal bracket and can reliably prevent the leakage of radio waves. The purpose is to provide.
【０００４】[0004]
【課題を解決するための手段】上記問題点を解決するた
めの本発明の技術手段は、制御基板を背面に装着した板
金ブラケットであって、その周縁部に、周縁に沿う方向
の長さが一定値以下で周縁から外方に延出する多数の舌
片を形成し、これらの舌片は筐体開口部の板金壁を交互
に挟み込むようように段違いに成形し、板金ブラケット
が電波シールド板形状を形成したことを特徴とする画像
形成装置である。この場合、周縁に沿う方向の長さにつ
いて一定値は、当該制御基板が放射する電波周波数の１
／４波長以下に設定すると電波の漏洩をほぼ完璧に防止
することができ、好適である。また、前記舌片が筐体開
口部の外壁に対向する位置の筐体開口部に、板金ブラケ
ット背面に対面する折り曲げ部を設けることによって、
板金ブラケット背面にぶつかり、筐体外へと反射される
電波経路の短絡を防ぎ、漏洩をさらに良好に防止する。The technical means of the present invention for solving the above problems is a sheet metal bracket on which a control board is mounted on a back surface, the peripheral portion of which has a length in the direction along the peripheral edge. A number of tongues extending outward from the periphery below a certain value are formed, and these tongues are formed stepwise so as to alternately sandwich the sheet metal wall of the housing opening, and the sheet metal bracket is An image forming apparatus in which a shape is formed. In this case, the constant value for the length along the periphery is one of the radio frequency radiated by the control board.
When the wavelength is set to / 4 wavelength or less, the leakage of the radio wave can be almost completely prevented, which is preferable. Further, by providing a bent portion facing the back of the sheet metal bracket at the housing opening at a position where the tongue piece faces the outer wall of the housing opening,
The short circuit of the radio wave path which is hit against the back of the sheet metal bracket and reflected out of the housing is prevented, and leakage is further effectively prevented.
【０００５】また、板金ブラケットの舌片に接触する接
地部材を筐体外壁にラッチ状に装着することによって、
接地機能を確実にすることができる。ここで、ラッチ状
とは、ドアなどの掛け金状の形状を言い、筐体外壁に取
付けたバネ材等によって舌片を押さえるような態様にし
た形状である。[0005] In addition, by attaching a grounding member which comes into contact with the tongue piece of the sheet metal bracket to the outer wall of the housing in a latch shape,
The grounding function can be ensured. Here, the latch shape refers to a latch-like shape of a door or the like, and is a shape in which a tongue piece is pressed by a spring material or the like attached to an outer wall of the housing.
【０００６】[0006]
【発明の実施の形態】以下図面を参照して本発明の実施
の形態を説明する。図３は画像形成装置１の背面斜視図
である。制御基板を板金の裏面に取付けた板金ブラケッ
ト１０が画像形成装置１に装着されている。この板金ブ
ラケット１０の裏面には画像形成装置の制御基板が装着
されている。また、電源や操作用のケーブル、制御用の
ケーブルあるいは外部機器と接続する各種のコネクタ、
その他が板金ブラケットの表面に露出して取付けられて
いる。このような板金ブラケット１０は従来、多数のビ
スによってねじ留め固定されていた。この板金ブラケッ
ト１０は、板金筐体の開口部を閉止し、筐体から電波が
漏洩しないように取り付ける必要がある。Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a rear perspective view of the image forming apparatus 1. A sheet metal bracket 10 in which a control board is attached to the back of the sheet metal is mounted on the image forming apparatus 1. A control board of the image forming apparatus is mounted on the back surface of the sheet metal bracket 10. In addition, power and operation cables, control cables or various connectors for connecting to external devices,
Others are exposed and attached to the surface of the sheet metal bracket. Conventionally, such a sheet metal bracket 10 has been screwed and fixed by a large number of screws. The sheet metal bracket 10 needs to be closed so that the opening of the sheet metal housing is closed and radio waves do not leak from the housing.
【０００７】図１は本発明の１実施例を示す板金ブラケ
ット１０及びこれを取り付けるべき筐体２の斜視図であ
る。ブラケット１０は、内面に各種の制御基板を装着
し、外面にもその取付け部やコネクタ等１１が取付けら
れている。実施例では、２本のビス１２で画像形成装置
の筐体２の背面側のフランジ３に設けた雌ねじに締め付
けて取り付けられる。ブラケット１０の周縁部には多数
の舌片１３が周縁から延出して設けられている。舌片１
３は、ブラケットの周縁に沿う方向の長さ１４が一定値
以下に形成されている。この一定値以下の長さ１４は、
この制御装置が放射する電波周波数の１／４波長以下に
設定される。隣接する舌片１３は、周縁から外方に延出
しており、筐体２の開口部５の回りの板金壁６を交互に
挟み込むようように段違いに成形されている。FIG. 1 is a perspective view of a sheet metal bracket 10 showing an embodiment of the present invention and a housing 2 to which the sheet metal bracket 10 is attached. The bracket 10 has various control boards mounted on its inner surface, and its mounting portion and connectors 11 are also mounted on its outer surface. In the embodiment, the two screws 12 are attached to the female screw provided on the flange 3 on the rear side of the housing 2 of the image forming apparatus by being tightened. A large number of tongue pieces 13 are provided on the periphery of the bracket 10 so as to extend from the periphery. Tongue piece 1
In No. 3, a length 14 in a direction along a peripheral edge of the bracket is formed to be equal to or less than a predetermined value. The length 14 below this fixed value is
The frequency is set to １ ／ wavelength or less of the radio frequency radiated by the control device. The adjacent tongue pieces 13 extend outward from the peripheral edge and are formed stepwise so as to alternately sandwich the sheet metal wall 6 around the opening 5 of the housing 2.
【０００８】筐体開口部５の外壁に当接する位置に設け
られている舌片１３に対応する筐体開口部５に板金ブラ
ケット内面に対面する折り曲げ部７が形成されている。
この折り曲げ部７はブラケットの背面に微細な隙間をも
つスリットを形成し、板金ブラケット背面にぶつかり、
筐体外へと反射される電波経路の短絡を防ぎ、外側の舌
片の部分からの電波の漏洩を阻止する。また、板金ブラ
ケット１０の舌片１３の外面に接触する接地部材８を筐
体外壁にラッチ状に装着している。ラッチ状の接地部材
８は、例えば板バネのように舌片１３の外面に押し付け
られるように付勢されており、導電体で構成され、板金
ブラケット１０と筐体２とを電気的に結合し、接地を完
全にする。A bent portion 7 facing the inner surface of the sheet metal bracket is formed in the housing opening 5 corresponding to the tongue piece 13 provided at a position in contact with the outer wall of the housing opening 5.
The bent portion 7 forms a slit with a minute gap on the back of the bracket, and collides with the back of the sheet metal bracket.
The short circuit of the radio wave path reflected outside the housing is prevented, and the leakage of the radio wave from the outer tongue is prevented. In addition, a grounding member 8 that comes into contact with the outer surface of the tongue piece 13 of the sheet metal bracket 10 is mounted on the outer wall of the housing in a latch shape. The latch-like grounding member 8 is urged so as to be pressed against the outer surface of the tongue piece 13 like a leaf spring, for example, is made of a conductor, and electrically connects the sheet metal bracket 10 and the housing 2. Complete grounding.
【０００９】図２は、筐体２とブラケット１０の側面図
で、ブラケット１０を筐体２に装着する工程を示してい
る。ブラケット１０の上縁及び下縁に舌片１３が筐体２
の板金壁６を上下に挟み込むように形成されていること
を示している。FIG. 2 is a side view of the housing 2 and the bracket 10 and shows a process of mounting the bracket 10 to the housing 2. The tongue 13 is provided on the upper and lower edges of the bracket 10
Is formed so as to sandwich the sheet metal wall 6 vertically.
【００１０】[0010]
【発明の効果】本発明によれば、板金ブラケットを小さ
いピッチで多数個のビスでネジ止めする必要がなく、オ
プション追加やメンテナンスの際に作業者が、制御基板
を装着した板金ブラケットを簡単に脱着することができ
る。本発明の構造により、電波が複雑に反射しても電波
の漏洩を防止することができる。舌片にて筐体の板金を
挟み込むことにより、筐体自体の剛性も高めることがで
き、従って筐体の板金を薄くすることができる。また、
舌片の周縁方向の長さを、電波の波長より短い寸法にす
ることにより筐体と板金の隙間（スリット）から電波が
漏洩するのを防止することができる。舌片が筐体開口部
の外壁に対向する位置の筐体開口部に板金ブラケット背
面に対面する折り曲げ部を設けたことにより電波の反射
経路を複雑化し、電波を漏洩しにくくする。また、板金
ブラケットに溜まった静電気をラッチ状の接地部材にて
排除しつつ、併せて制御基板の装着性も向上させること
ができた。According to the present invention, there is no need to screw the sheet metal bracket with a large number of screws at a small pitch, and when adding options or performing maintenance, the operator can easily mount the sheet metal bracket on which the control board is mounted. Can be detached. With the structure of the present invention, it is possible to prevent radio waves from leaking even if the radio waves are reflected in a complicated manner. By sandwiching the sheet metal of the casing between the tongue pieces, the rigidity of the casing itself can be increased, and thus the sheet metal of the casing can be made thin. Also,
By making the length of the tongue piece in the peripheral direction shorter than the wavelength of the radio wave, it is possible to prevent the radio wave from leaking from the gap (slit) between the housing and the sheet metal. By providing a bent portion facing the back of the sheet metal bracket at the housing opening at a position where the tongue faces the outer wall of the housing opening, the reflection path of the radio wave is complicated, and the radio wave is hardly leaked. In addition, the static electricity accumulated in the sheet metal bracket is eliminated by the latch-shaped grounding member, and the mountability of the control board can be improved.
【図１】本発明の１実施例を示す板金ブラケット及び筐
体の斜視図である。FIG. 1 is a perspective view of a sheet metal bracket and a housing showing one embodiment of the present invention.
【図２】実施例の側面図である。FIG. 2 is a side view of the embodiment.
【図３】画像形成装置の背面斜視図である。FIG. 3 is a rear perspective view of the image forming apparatus.
１ 画像形成装置 ２ 筐体 ３ フランジ ４ 雌ねじ ５ 開口 ６ 周縁壁 ７ 折り曲げ部 ８ 接地部材 １０ ブラケット １１ コネクタ等 １２ ビス １３ 舌片 １４ 周縁に沿う寸法 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Housing 3 Flange 4 Female screw 5 Opening 6 Peripheral wall 7 Bending part 8 Grounding member 10 Bracket 11 Connector etc. 12 Screw 13 Tongue piece 14 Dimension along the peripheral edge
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０５Ｋ 9/00 Ｇ０６Ｆ 1/00 ３１２Ｌ Ｆターム(参考） 2C061 AP04 AQ06 BB30 BB33 CP09 2H027 JA20 JB30 JC18 2H071 AA26 BA03 BA13 BA20 BA23 DA31 DA34 4E360 AB03 AB14 BA02 BC04 BC06 EA13 ED02 ED03 ED12 ED23 GA34 GB44 GC14 5E321 AA03 BB44 CC22 GG05 GG12──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) H05K 9/00 G06F 1/00 312L F-term (reference) 2C061 AP04 AQ06 BB30 BB33 CP09 2H027 JA20 JB30 JC18 2H071 AA26 BA03 BA13 BA20 BA23 DA31 DA34 4E360 AB03 AB14 BA02 BC04 BC06 EA13 ED02 ED03 ED12 ED23 GA34 GB44 GC14 5E321 AA03 BB44 CC22 GG05 GG12
Claims (4)
付けられる板金ブラケットであって、その周縁部に、周
縁に沿う方向の長さが一定値以下で周縁から外方に延出
する多数の舌片を形成し、該舌片は筐体開口部の板金壁
を交互に挟み込むようように段違いに成形し、板金ブラ
ケットが電波シールド板形状を形成したことを特徴とす
る画像形成装置。1. A sheet metal bracket to which a control board is mounted on a back surface and which is attached to an opening of a housing, and which extends outward from the peripheral edge at a peripheral edge thereof with a length in a direction along the peripheral edge being a predetermined value or less. An image forming apparatus, comprising: a plurality of tongues; and the tongues are formed stepwise so as to alternately sandwich a sheet metal wall of a housing opening, and a sheet metal bracket has a shape of a radio wave shield plate.
電波周波数の１／４波長以下に設定したことを特徴とす
る請求項１記載の画像形成装置。2. The image forming apparatus according to claim 1, wherein the fixed value is set to be equal to or less than １ ／ wavelength of a radio frequency radiated by the control board.
位置の筐体開口部に板金ブラケット背面に対面する折り
曲げ部を設けたことを特徴とする請求項１記載の画像形
成装置。3. The image forming apparatus according to claim 1, wherein a bent portion facing the back surface of the sheet metal bracket is provided in the housing opening at a position where the tongue faces the outer wall of the housing opening.
材を筐体外壁にラッチ状に装着したことを特徴とする請
求項１記載の画像形成装置。4. The image forming apparatus according to claim 1, wherein a grounding member that contacts the tongue of the sheet metal bracket is mounted on the outer wall of the housing in a latch shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001160656A JP3941419B2 (en) | 2001-05-29 | 2001-05-29 | Image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001160656A JP3941419B2 (en) | 2001-05-29 | 2001-05-29 | Image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002353639A true JP2002353639A (en) | 2002-12-06 |
| JP3941419B2 JP3941419B2 (en) | 2007-07-04 |
Family
ID=19004034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001160656A Expired - Fee Related JP3941419B2 (en) | 2001-05-29 | 2001-05-29 | Image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3941419B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006091835A (en) * | 2004-07-15 | 2006-04-06 | Ricoh Co Ltd | External device and electronic equipment |
| JP2007223247A (en) * | 2006-02-24 | 2007-09-06 | Seiko Epson Corp | Grounding device for electronic component, recorder and liquid injection apparatus |
| KR100959577B1 (en) | 2007-01-18 | 2010-05-27 | 후지쯔 가부시끼가이샤 | Enclosure of information technology equipment |
| JP2015044298A (en) * | 2013-08-27 | 2015-03-12 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
| US10935918B2 (en) | 2017-01-17 | 2021-03-02 | Seiko Epson Corporation | Printing apparatus |
-
2001
- 2001-05-29 JP JP2001160656A patent/JP3941419B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006091835A (en) * | 2004-07-15 | 2006-04-06 | Ricoh Co Ltd | External device and electronic equipment |
| JP4666596B2 (en) * | 2004-07-15 | 2011-04-06 | 株式会社リコー | External devices and electrical and electronic equipment |
| JP2007223247A (en) * | 2006-02-24 | 2007-09-06 | Seiko Epson Corp | Grounding device for electronic component, recorder and liquid injection apparatus |
| KR100959577B1 (en) | 2007-01-18 | 2010-05-27 | 후지쯔 가부시끼가이샤 | Enclosure of information technology equipment |
| JP2015044298A (en) * | 2013-08-27 | 2015-03-12 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
| CN104423236A (en) * | 2013-08-27 | 2015-03-18 | 京瓷办公信息系统株式会社 | Image Forming Apparatus |
| CN104423236B (en) * | 2013-08-27 | 2019-04-05 | 京瓷办公信息系统株式会社 | Image forming apparatus |
| US10935918B2 (en) | 2017-01-17 | 2021-03-02 | Seiko Epson Corporation | Printing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3941419B2 (en) | 2007-07-04 |
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