JP2655470B2 - Electromagnetic shield fan - Google Patents
Electromagnetic shield fanInfo
- Publication number
- JP2655470B2 JP2655470B2 JP5271090A JP27109093A JP2655470B2 JP 2655470 B2 JP2655470 B2 JP 2655470B2 JP 5271090 A JP5271090 A JP 5271090A JP 27109093 A JP27109093 A JP 27109093A JP 2655470 B2 JP2655470 B2 JP 2655470B2
- Authority
- JP
- Japan
- Prior art keywords
- fan
- housing
- rotor
- electromagnetic shield
- metal
- 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
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はファンに関し、特に電磁
シールドされたファンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan, and more particularly to an electromagnetically shielded fan.
【０００２】[0002]
【従来の技術】半導体チップの集積化及びチップ当たり
の消費電力の増加にともなって、電子機器の発熱量は全
体的に増える傾向にある。その熱エネルギーを電気機器
外へ放出するためにファンンが多く用いられる。一方、
電子機器が市場にあふれるにつれ、電子機器からの放出
電磁波によて他の電子機器が誤動作するという電磁障害
の問題がクローズアップされている。日本国内では、情
報処理装置等電磁障害自主規制協議会（ＶＣＣＩ）によ
って規制（通称：ＶＣＣＩ１種、ＶＣＣＩ２種）が設定
され、法的強制力はないが、製造メーカはこの規制値を
クリアするように要求されている。なかでも、電磁障害
の問題に対して電子機器をシールドし、開口を減らす方
法が採用され多くの機器で実施されている。しかし、放
熱の問題のためには大きな開口が必要となる。この開口
部からの放射電磁波を抑制するために、ファンの上にパ
ンチングメタルやエキスパンドメタルのような***が多
数開いている金属板をカバーとして取り付ける必要があ
り、ファン自信が有する冷却性能を低下させている。フ
ァン自信の冷却性能を損なうことなく、電磁障害対策を
施した例としては、公開特許公報平−１１１８６４号に
示された構成が知られている。2. Description of the Related Art With the integration of semiconductor chips and the increase in power consumption per chip, the amount of heat generated by electronic devices tends to increase as a whole. Fans are often used to release the heat energy out of electrical equipment. on the other hand,
As electronic devices flood the market, the problem of electromagnetic interference, in which other electronic devices malfunction due to electromagnetic waves emitted from the electronic devices, has been highlighted. In Japan, regulations (commonly known as VCCI type 1 and VCCI type 2) are set by the Voluntary Control Council for Electromagnetic Interference (VCCI) for information processing equipment, and there is no legal enforcement, but manufacturers are required to clear this regulation value Is required. Above all, a method of shielding an electronic device for a problem of electromagnetic interference and reducing an aperture is adopted and implemented in many devices. However, a large aperture is required due to the problem of heat dissipation. In order to suppress the radiated electromagnetic waves from this opening, it is necessary to attach a metal plate with many small holes such as punched metal and expanded metal on the fan as a cover, which reduces the cooling performance of the fan itself. ing. As an example of taking measures against electromagnetic interference without impairing the cooling performance of the fan itself, a configuration disclosed in Japanese Patent Application Laid-Open No. Hei 11-118864 is known.
【０００３】[0003]
【発明が解決しようとする課題】上記公報記載のファン
は、ファンの回転軸と装置筐体を金属ブラシで接続し、
回転翼とファンのケーシング間で発生する静電気ノイズ
を抑制しているが、電子機器筐体でのシールド性能まで
追求していない。In the fan described in the above publication, the rotating shaft of the fan and the device housing are connected by a metal brush,
Although it suppresses electrostatic noise generated between the rotor blades and the casing of the fan, it does not pursue the shielding performance of the housing of electronic equipment.
【０００４】[0004]
【課題を解決するための手段】本発明の目的は、上述の
欠点を除去し、冷却能力を低下させずしかも電子機器筐
体でのシールド性能を追求した新規なファンを提供する
ことにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a novel fan which eliminates the above-mentioned drawbacks, does not lower the cooling capacity, and pursues a shielding performance in an electronic equipment housing.
【０００５】本発明のファンは、上記目的を達成するた
めに、ファン自身にシールド性能を保有させている。具
体的には、回転翼とハウジングを金属等の導電性を有す
る材料で製作し、金属バネ、ベアリング等の導電性の接
触子で回転翼とハウジングとを電気的に接続させる。さ
らにモーターが発する低周波ノイズを低減させるため、
回転翼に隣接するハウジング部にフェライト磁性体を装
着し、低周波ノイズに対してのシールド効果を高めてい
る。[0005] In order to achieve the above object, the fan of the present invention has the fan itself possess a shielding performance. Specifically, the rotor and the housing are made of a conductive material such as metal, and the rotor and the housing are electrically connected by conductive contacts such as metal springs and bearings. In order to further reduce low frequency noise generated by the motor,
A ferrite magnetic body is attached to the housing adjacent to the rotor, which enhances the shielding effect against low-frequency noise.
【０００６】[0006]
【実施例】次に本発明について図面を参照して説明す
る。図１は本発明の一実施例を示すファンの断面図であ
る。このファンの製造にあたっては、まず回転翼１とハ
ウジング２を導電性材料（導電性プラスチック、金属
等）で製作し、回転翼１にハウジング２を接触させるた
めの金属バネ３を取り付けた構造にする。なおハウジン
グ２はモータ収容部２Ａと周辺部２Ｂ、およびこれら収
容部と周辺部を接続するアーム２Ｃとから構成されてい
る。金属バネ３は回転翼１の周囲に多数配置するなどし
て、接触面積を大きく取る。また、金属バネ３がハウジ
ング２の同一個所を擦ることによる摩耗を防ぐため、金
属バネ３の長さは各々異るようにしたり、角度をつけて
配置されている。回転翼１とハウジング２を電気的に接
続する事によって、回転翼１とハウジング２の間に生じ
る電位差が減少し、ファン自身にシールド性能が得るこ
とができる。さらに、フェライト４をハフジング２の周
辺部２Ｃに配置し、例としてカバー５で保持した構造に
することにより、ファンのモーターから生じる低周波ノ
イズに対してシールド効果を高める事ができ、しかも、
ファンの冷却性能には影響を与えないことが可能とな
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a fan showing one embodiment of the present invention. In manufacturing this fan, first, the rotor 1 and the housing 2 are made of a conductive material (conductive plastic, metal, etc.), and a metal spring 3 for bringing the housing 2 into contact with the rotor 1 is adopted. . The housing 2 includes a motor accommodating portion 2A and a peripheral portion 2B, and an arm 2C connecting the accommodating portion and the peripheral portion. The metal spring 3 has a large contact area by arranging a large number around the rotor 1. Further, in order to prevent the metal springs 3 from being worn by rubbing the same part of the housing 2, the lengths of the metal springs 3 are different from each other or are arranged at an angle. By electrically connecting the rotor 1 and the housing 2, the potential difference between the rotor 1 and the housing 2 is reduced, and the fan itself can have shielding performance. Furthermore, by arranging the ferrite 4 in the peripheral portion 2C of the huffing 2 and holding the cover 5 as an example, it is possible to enhance the shielding effect against low-frequency noise generated from the fan motor, and
It is possible to have no effect on the cooling performance of the fan.
【０００７】金属バネ３の代わりにべアリング６を使用
し、ハウジング２と回転翼１を接続させる構成を図２に
示す。この構成でも、ベアリングを介して回転翼１が接
続されているため相互間の電位差を減少させることがで
き、十分なシールド効果が得られる。なお、図２では、
ハウジングの周辺部２Ｂは図面の簡単化のために省略し
てある。FIG. 2 shows a configuration in which a bearing 6 is used in place of the metal spring 3 and the housing 2 and the rotor 1 are connected. Also in this configuration, since the rotor 1 is connected via the bearing, the potential difference between them can be reduced, and a sufficient shielding effect can be obtained. In FIG. 2,
A peripheral portion 2B of the housing is omitted for simplification of the drawing.
【０００８】[0008]
【発明の効果】以上説明したように本発明は、ファンの
回転翼とハウジングを電気的に接続することによって、
ファン自身に放熱に性能を低下させることなく、電磁シ
ールドの機能をもたせる事ができ、装置の電磁シールド
問題を解決できる効果を有する。As described above, according to the present invention, by electrically connecting the rotor of the fan and the housing,
The fan itself can be provided with the function of an electromagnetic shield without deteriorating the performance of heat radiation, and has the effect of solving the electromagnetic shield problem of the device.
【図１】本発明の一実施を示す電磁シールドファンの断
面図。FIG. 1 is a sectional view of an electromagnetic shield fan showing one embodiment of the present invention.
【図２】本発明の他の実施例を示す断面図。FIG. 2 is a sectional view showing another embodiment of the present invention.
１ 回転翼 ２ ハウジング ３ 金属バネ ４ フェライト ５ カバー DESCRIPTION OF SYMBOLS 1 Rotor blade 2 Housing 3 Metal spring 4 Ferrite 5 Cover
Claims (1)
を有する部材で電気的に接続し、ファンの回転翼の周囲
のハウジング部にフェライト磁性体を配置し、シールド
ファンのカバーで保持することを特徴とする電磁シール
ドファン。An object of the present invention is to electrically connect a rotor blade body and a fan housing with a conductive member, dispose a ferrite magnetic material in a housing around a rotor blade, and hold the ferrite magnetic body with a cover of a shield fan. Characteristic electromagnetic shield fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5271090A JP2655470B2 (en) | 1993-10-29 | 1993-10-29 | Electromagnetic shield fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5271090A JP2655470B2 (en) | 1993-10-29 | 1993-10-29 | Electromagnetic shield fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07131183A JPH07131183A (en) | 1995-05-19 |
| JP2655470B2 true JP2655470B2 (en) | 1997-09-17 |
Family
ID=17495227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5271090A Expired - Lifetime JP2655470B2 (en) | 1993-10-29 | 1993-10-29 | Electromagnetic shield fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2655470B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109391716B (en) * | 2018-09-21 | 2020-10-23 | 扬州雁归商贸有限公司 | Placing rack for mobile phone and operation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611109B2 (en) * | 1975-02-20 | 1981-03-12 | ||
| JPS60249392A (en) * | 1984-05-24 | 1985-12-10 | ティーディーケイ株式会社 | Electromagnetic shielding material |
| JPS60262495A (en) * | 1984-06-09 | 1985-12-25 | ソニー株式会社 | Electronic device |
| JPH03111864A (en) * | 1989-09-27 | 1991-05-13 | Ricoh Co Ltd | Fan for recording device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611109U (en) * | 1979-07-09 | 1981-01-30 | ||
| JPS63114096U (en) * | 1987-01-20 | 1988-07-22 |
-
1993
- 1993-10-29 JP JP5271090A patent/JP2655470B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611109B2 (en) * | 1975-02-20 | 1981-03-12 | ||
| JPS60249392A (en) * | 1984-05-24 | 1985-12-10 | ティーディーケイ株式会社 | Electromagnetic shielding material |
| JPS60262495A (en) * | 1984-06-09 | 1985-12-25 | ソニー株式会社 | Electronic device |
| JPH03111864A (en) * | 1989-09-27 | 1991-05-13 | Ricoh Co Ltd | Fan for recording device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07131183A (en) | 1995-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970422 |