JPS589417Y2 - Shield device - Google Patents
Shield deviceInfo
- Publication number
- JPS589417Y2 JPS589417Y2 JP5894176U JP5894176U JPS589417Y2 JP S589417 Y2 JPS589417 Y2 JP S589417Y2 JP 5894176 U JP5894176 U JP 5894176U JP 5894176 U JP5894176 U JP 5894176U JP S589417 Y2 JPS589417 Y2 JP S589417Y2
- Authority
- JP
- Japan
- Prior art keywords
- shield device
- shield
- shielding
- lid
- magnetic
- 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
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【考案の詳細な説明】
本考案はテレビジョン受信機の回路の一部を外部より磁
気的に遮へいするシールド装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shielding device for magnetically shielding a part of the circuit of a television receiver from the outside.
テレビジョン受信機を小形化しようとすれば多くの部品
を接近して配置しなければならない。If a television receiver is to be miniaturized, many components must be placed close to each other.
特に画面面積の小さな陰極線管を用いてテレビジョン受
信機の小形化をはかるとき多くの部品が陰極線管のネッ
ク部周辺に集中して配置される。In particular, when attempting to downsize a television receiver by using a cathode ray tube with a small screen area, many components are concentrated around the neck of the cathode ray tube.
したがって、ネック部周辺に集中された部品によって構
成された回路は、垂直又は水平の偏向磁界の影響を強く
受ける。Therefore, a circuit made up of components concentrated around the neck is strongly influenced by vertical or horizontal deflection magnetic fields.
一方、音声回路等に設けられたシールド装置は電界の遮
へいについては充分な性能を持つように設計されている
が、磁界の遮へいについては充分な性能を持っていない
。On the other hand, shielding devices provided in audio circuits and the like are designed to have sufficient performance in shielding electric fields, but do not have sufficient performance in shielding magnetic fields.
これは、シールド装置の加工を容易にするため、釦よび
シールド装置とプリント基板との半田付による接続を容
易にするためにシールド装置を形成する鉄板が比較的薄
いためである。This is because the iron plate forming the shield device is relatively thin in order to facilitate the processing of the shield device and to facilitate connection by soldering between the button and the shield device and the printed circuit board.
したがって、小形のテレビジョン受信機では垂直偏向磁
束が音声検波回路のレシオ検波用のトランスを通り、こ
れによりバズ音が発生することがある。Therefore, in a small television receiver, the vertically deflected magnetic flux passes through the ratio detection transformer of the audio detection circuit, which may generate a buzz sound.
本考案の目的は磁気的影響を受は易い電子回路を外部磁
界より遮へいする簡単な構造のシールド装置を提供する
にある。An object of the present invention is to provide a shielding device with a simple structure for shielding electronic circuits that are susceptible to magnetic influences from external magnetic fields.
本考案はプリント印刷基板上に配置した電子回路部品を
静電的に遮へいするよう構成した箱状のシールド装置の
蓋を利用して外部磁界が前記電子回路部品に影響を与え
ないように磁路を形成させるものである。The present invention uses the lid of a box-shaped shielding device configured to electrostatically shield electronic circuit components placed on a printed circuit board to prevent external magnetic fields from affecting the electronic circuit components. is formed.
以下、第１図〜第３図を用いて本考案を説明する。The present invention will be explained below using FIGS. 1 to 3.
第１図は本考案によるシールド装置の一実施例を示す斜
視図である。FIG. 1 is a perspective view showing an embodiment of a shielding device according to the present invention.
音声中間周波回路、音声検波回路を覆うシールド蓋１は
半田メッキ鋼板等の透磁率の高い材料で組立てられてむ
り、断面り字状の突出部１人がシールド蓋１の上面板２
と一体に設けられている。The shield lid 1 that covers the audio intermediate frequency circuit and the audio detection circuit is assembled from a material with high magnetic permeability such as a solder-plated steel plate, and one protrusion with a cursor-shaped cross section is attached to the top plate 2 of the shield lid 1.
It is integrated with the
なお穴３は調整用穴である。第２図はシールド装置と陰
極線管との配置状態を示す側面図であり、第３図はその
背面図である。Note that hole 3 is an adjustment hole. FIG. 2 is a side view showing the arrangement of the shield device and the cathode ray tube, and FIG. 3 is a rear view thereof.
図にむいて、４は陰極線管、５は偏向ヨーク、６は基板
、７はシールドケースである。In the figure, 4 is a cathode ray tube, 5 is a deflection yoke, 6 is a substrate, and 7 is a shield case.
シールドケース７内には音声中間周波回路、音声検波回
路が設けられている。Inside the shield case 7, an audio intermediate frequency circuit and an audio detection circuit are provided.
上面板２ふ・よび入出部１Ａの透磁率は高いので、シー
ルドケース７付近の垂直偏向磁束は上面板２、突出部１
人に集中される。Since the magnetic permeability of the top plate 2 and the entrance/exit part 1A is high, the vertical deflection magnetic flux near the shield case 7 is
focused on people.
したがって、シールド装置内を通る垂直偏向磁束は大幅
に減少され、バズ音の発生が防止される。Therefore, the vertically deflected magnetic flux passing through the shield device is significantly reduced, and the generation of buzzing noise is prevented.
また、突出部１人が設けられているので、シールドケー
ス７の側面７Ａの鉄板を厚くしなくでも側面７Ａからシ
ールドケース７に入ろうとする磁束は突出部１人により
遮へいされる。Furthermore, since one protrusion is provided, the magnetic flux that attempts to enter the shield case 7 from the side surface 7A can be blocked by the single protrusion without making the iron plate on the side surface 7A of the shield case 7 thicker.
したがって、本考案によればシールド蓋１のみの磁気シ
ールド効果により充分な磁気シールド効果を得ることが
でき、シールドケース７は従来と同様に薄い鉄板を用い
ることができる。Therefore, according to the present invention, a sufficient magnetic shielding effect can be obtained by the magnetic shielding effect of the shield lid 1 alone, and the shield case 7 can be made of a thin iron plate as in the conventional case.
第１図は本考案によるシールド装置の一実施例を示す斜
視図、第２図、第３図はシールド装置と陰極線管との配
置状態を示す側面回転よび背面図である。
１・・・・・・シールド蓋、１Ａ・・・・・・突出部、
２・・・・・・上面板、５・・・・・・偏向ヨーク、６
・・・・・・基板。FIG. 1 is a perspective view showing an embodiment of the shield device according to the present invention, and FIGS. 2 and 3 are side and rear views showing the arrangement of the shield device and the cathode ray tube. 1...Shield lid, 1A...Protrusion,
2...Top plate, 5...Deflection yoke, 6
······substrate.
Claims (1)
装置にトいて、該シールド装置の枠と相対する該シール
ド装置の蓋の少なくとも１辺の長さが、鉄枠の１辺の長
さより長いことを特徴とするシールド装置。For a box-shaped shield device assembled on the component side of a printed circuit board, the length of at least one side of the lid of the shield device that faces the frame of the shield device is longer than the length of one side of the iron frame. A shield device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5894176U JPS589417Y2 (en) | 1976-05-12 | 1976-05-12 | Shield device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5894176U JPS589417Y2 (en) | 1976-05-12 | 1976-05-12 | Shield device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52150931U JPS52150931U (en) | 1977-11-16 |
| JPS589417Y2 true JPS589417Y2 (en) | 1983-02-21 |
Family
ID=28518303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5894176U Expired JPS589417Y2 (en) | 1976-05-12 | 1976-05-12 | Shield device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS589417Y2 (en) |
-
1976
- 1976-05-12 JP JP5894176U patent/JPS589417Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52150931U (en) | 1977-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4644408A (en) | Television receiver having multi-purpose chassis frame | |
| JPS589417Y2 (en) | Shield device | |
| JP3570263B2 (en) | DC-DC converter | |
| KR960000914B1 (en) | Print coil for modulation-demodulation circuit | |
| KR19990070277A (en) | Electromagnetic shielding can structure for RF system | |
| JPS6036943Y2 (en) | cathode ray tube device | |
| JPS5822396Y2 (en) | Magnetic circuit of magnetically shielded speaker | |
| JPS6133751Y2 (en) | ||
| JPH0430876Y2 (en) | ||
| JPS63166295A (en) | Magnetic field suppressor | |
| JPS6012357Y2 (en) | electronic tuner | |
| JPH0143912Y2 (en) | ||
| JP2530637Y2 (en) | Noise reduction device | |
| JPS6029796Y2 (en) | cathode ray tube | |
| JPH084744Y2 (en) | Surface acoustic wave device | |
| JP2890808B2 (en) | Electronics | |
| JPH057833Y2 (en) | ||
| JPS6130273Y2 (en) | ||
| JPH0740757B2 (en) | Speaker device | |
| JPH10145071A (en) | Emc countermeasure structure | |
| JPH04614Y2 (en) | ||
| JPS6022894U (en) | Shield structure of circuit board equipment | |
| JPH05144355A (en) | Proximity switch | |
| JPH0421231Y2 (en) | ||
| JPH11274786A (en) | Mounting structure of insulation sheet |