JPH0320491U - - Google Patents
Info
- Publication number
- JPH0320491U JPH0320491U JP8042489U JP8042489U JPH0320491U JP H0320491 U JPH0320491 U JP H0320491U JP 8042489 U JP8042489 U JP 8042489U JP 8042489 U JP8042489 U JP 8042489U JP H0320491 U JPH0320491 U JP H0320491U
- Authority
- JP
- Japan
- Prior art keywords
- box
- radio wave
- control board
- accommodating
- wave absorber
- 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
- 239000006096 absorbing agent Substances 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 4
- 229910001035 Soft ferrite Inorganic materials 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 2
- 229920003002 synthetic resin Polymers 0.000 claims 2
- 239000000057 synthetic resin Substances 0.000 claims 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims 1
- 239000004952 Polyamide Substances 0.000 claims 1
- 239000004734 Polyphenylene sulfide Substances 0.000 claims 1
- 239000004743 Polypropylene Substances 0.000 claims 1
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 229920000306 polymethylpentene Polymers 0.000 claims 1
- 239000011116 polymethylpentene Substances 0.000 claims 1
- 229920000069 polyphenylene sulfide Polymers 0.000 claims 1
- -1 polypropylene Polymers 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Description
第１図は本考案にかかるレーザープリンタにお
ける制御基板収容用保護函の一実施例の分解斜視
図、第２図は同実施例の縦断面図、第３図は同実
施例における要部拡大縦断面図、第４図は電波吸
収体の取付け位置の他の実施例、第５図イ，ロ，
ハは電波吸収体の取付け方法の他の実施例、第６
図は保護函の空気の流れを示す要部拡大断面図、
第７図は電波吸収体内に入射する電波の様子を示
す説明図、第８図は従来例である。
Ａ……保護函、１……制御基板、２……下部函
、３……上部函、４……側板、５…電波吸収体、
６……側板、７……角部、８……開口、９……天
板、１０……開口上縁、１１……空気流通用間隙
、１２……側板内面、１３……側板外面、１４…
…空気流通用間隙、１５……係止凸部、１６……
取付け孔、１７……段部、１８……長穴。
Fig. 1 is an exploded perspective view of an embodiment of a protective box for housing a control board in a laser printer according to the present invention, Fig. 2 is a vertical cross-sectional view of the same embodiment, and Fig. 3 is an enlarged longitudinal cross-section of the main parts of the same embodiment. Top view, Figure 4 shows another example of the mounting position of the radio wave absorber, Figure 5 A, B,
C is another example of the method of installing the radio wave absorber, No. 6
The figure is an enlarged cross-sectional view of the main parts showing the air flow in the protective case.
FIG. 7 is an explanatory diagram showing the state of radio waves entering the radio wave absorber, and FIG. 8 is a conventional example. A...Protective box, 1...Control board, 2...Lower box, 3...Upper box, 4...Side plate, 5...Radio wave absorber,
6... Side plate, 7... Corner, 8... Opening, 9... Top plate, 10... Upper edge of opening, 11... Air circulation gap, 12... Inner surface of side plate, 13... Outer surface of side plate, 14 …
... Air circulation gap, 15 ... Locking convex portion, 16 ...
Mounting hole, 17... step, 18... oblong hole.
Claims (1)
と、 下面が開口するとともに前記下部函に外装した
ときに下部函の開口上縁及び下部函外側面との間
に空気流通用間隙が形成される大きさに設定され
、且つ側面に空気流通用開口を設けられた縦断面
略〓形の鉄製の上部函と、 前記空気流通用間隙を挟んで対設された下部函
側板の外面と上部函側板の内面の一方又は両方に
、その厚み方向を前記側板の厚み方向に一致させ
ることで、その巾方向が当該間隙内を直進する電
波の通過方向に略一致するように取付けてなるソ
フトフエライト若しくはマグネタイトを合成樹脂
に分散混合して形成した電波吸収体と、 からなるレーザープリンタにおける制御基板収
容用保護函。 ２ ソフトフエライトとしてはマンガンジンクフ
エライトを用い、合成樹脂としてはポリメチルペ
ンテン、ポリプロピレン、ポリアミド、ポリフエ
ニレンサルフアイドのうちから選んだ一種又は二
種以上のものを混合したものを用いてなる前記実
用新案登録請求の範囲第１項記載のレーザープリ
ンタにおける制御基板収容用保護函。 ３ 電波吸収体としては短冊状若しくは帯状のも
のを用いてなる前記実用新案登録請求の範囲第１
項又は第２項記載のレーザープリンタにおける制
御基板収容用保護函。 ４ 電波吸収体の巾を少なくとも吸収対象である
漏洩電波の基本波長の1/4以上の長さに設定して
なる前記実用新案登録請求の範囲第３項記載のレ
ーザープリンタにおける制御基板収容用保護函。 ５ 係止凸部を形成した電波吸収体を射出成形す
るとともに、該電波吸収体が取りつけられる下部
函若しくは上部函の側板には前記係止凸部を受け
入れる為の取付け孔を開設してなる前記実用新案
登録請求の範囲第１項、第２項、第３項又は第４
項記載のレーザープリンタにおける制御基板収容
用保護函。[Scope of Claim for Utility Model Registration] 1. A lower box made of iron with a generally longitudinal cross section that is open at the top, and an open upper edge of the lower box and the outside surface of the lower box when the lower box is externally packaged. An upper box made of iron having a substantially square-shaped vertical section and having a size such that an air circulation gap is formed in between, and an air circulation opening provided on the side surface; By aligning the thickness direction of one or both of the outer surface of the lower box side plate and the inner surface of the upper box side plate with the thickness direction of the side plate, the width direction substantially matches the passing direction of radio waves traveling straight through the gap. A protective box for accommodating a control board in a laser printer, comprising: a radio wave absorber formed by dispersing and mixing soft ferrite or magnetite into a synthetic resin; 2. The above-mentioned practical use in which manganese zinc ferrite is used as the soft ferrite, and one or a mixture of two or more selected from polymethylpentene, polypropylene, polyamide, and polyphenylene sulfide is used as the synthetic resin. A protective box for accommodating a control board in a laser printer as claimed in claim 1. 3 Claim 1 of the above-mentioned utility model registration in which a strip-shaped or band-shaped material is used as the radio wave absorber.
A protective box for accommodating a control board in a laser printer according to item 1 or 2. 4. Protection for accommodating a control board in a laser printer according to claim 3 of the utility model registration claim, wherein the width of the radio wave absorber is set to at least 1/4 or more of the fundamental wavelength of the leaked radio wave to be absorbed. Box. 5. The radio wave absorber having a locking protrusion formed thereon is injection molded, and a mounting hole for receiving the locking protrusion is provided in the side plate of the lower or upper case to which the radio wave absorber is attached. Scope of Utility Model Registration Claims Paragraph 1, Paragraph 2, Paragraph 3, or Paragraph 4
A protective box for accommodating a control board in the laser printer described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989080424U JPH0644153Y2 (en) | 1989-07-08 | 1989-07-08 | Protective box for housing control board in laser printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989080424U JPH0644153Y2 (en) | 1989-07-08 | 1989-07-08 | Protective box for housing control board in laser printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0320491U true JPH0320491U (en) | 1991-02-28 |
| JPH0644153Y2 JPH0644153Y2 (en) | 1994-11-14 |
Family
ID=31625471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989080424U Expired - Lifetime JPH0644153Y2 (en) | 1989-07-08 | 1989-07-08 | Protective box for housing control board in laser printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0644153Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284089A (en) * | 1985-06-07 | 1986-12-15 | 内藤 喜之 | Electromagnetic wave leakage preventor for microwave heater |
| JPS6461098A (en) * | 1987-09-01 | 1989-03-08 | Nec Corp | Gasket for electromagnetic shielding |
-
1989
- 1989-07-08 JP JP1989080424U patent/JPH0644153Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61284089A (en) * | 1985-06-07 | 1986-12-15 | 内藤 喜之 | Electromagnetic wave leakage preventor for microwave heater |
| JPS6461098A (en) * | 1987-09-01 | 1989-03-08 | Nec Corp | Gasket for electromagnetic shielding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0644153Y2 (en) | 1994-11-14 |
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