JPH025591Y2 - - Google Patents
Info
- Publication number
- JPH025591Y2 JPH025591Y2 JP1986111318U JP11131886U JPH025591Y2 JP H025591 Y2 JPH025591 Y2 JP H025591Y2 JP 1986111318 U JP1986111318 U JP 1986111318U JP 11131886 U JP11131886 U JP 11131886U JP H025591 Y2 JPH025591 Y2 JP H025591Y2
- Authority
- JP
- Japan
- Prior art keywords
- cover member
- frequency converter
- shielding effect
- circuit board
- high frequency
- 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
- 230000000694 effects Effects 0.000 claims description 13
- 229920003002 synthetic resin Polymers 0.000 claims description 10
- 239000000057 synthetic resin Substances 0.000 claims description 10
- 230000005684 electric field Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000011231 conductive filler Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003340 mental effect Effects 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、高周波コンバーターに於けるIC基
板の外周を覆うカバー部材の改良に関する。[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a cover member that covers the outer periphery of an IC board in a high frequency converter.
（従来の技術）
近時、ラジオ、テレビ、ビデオ等の通信機器或
はパソコン等の所謂OA機器には高周波伝送シス
テムが広く採用されるようになつた。これら機器
には高周波用コンバーターが組み込まれることは
当然であるが、斯かる高周波専用コンバーター
は、一般に高周波用IC等の電子部品を実装した
プリント基板が導電性の金属製カバー部材で覆わ
れ外部からのノイズの影響を遮断するようになさ
れると共に、該カバー部材に高周波の入出力用接
続端子（一般には、各種接栓座或はジヤツクと称
される）等が爾後的に付設される。(Prior Art) Recently, high frequency transmission systems have been widely adopted in communication equipment such as radios, televisions, and videos, and so-called OA equipment such as personal computers. It goes without saying that these devices incorporate high-frequency converters, but in such high-frequency converters, the printed circuit board on which electronic components such as high-frequency ICs are mounted is generally covered with a conductive metal cover member and is protected from the outside. The cover member is designed to block the influence of noise, and high frequency input/output connection terminals (generally referred to as various types of plug seats or jacks) are later attached to the cover member.
（考案が解決しようとする問題点）
ところで、上記カバー部材は、金属板を所望形
状（展開状）に打ち抜き加工し、これを折り曲げ
適宜小さな箱型に組立てて前記プリント基板上に
該基板を覆うよう装着されるものであるが、組立
の際コーナーの突合せ部或は端子装着部位等の小
隙からのノイズの侵入或は漏れを防止する為、ハ
ンダ或はかしめ等によりその小隙の封止がなされ
る。このような組立・封止作業は精密さと高度の
技倆を要し且つ極めて煩わしいものであり、作業
者の精神的負担を大きくするとともに製造コスト
の高騰を来す一原因ともなつていた。(Problem to be solved by the invention) By the way, the above-mentioned cover member is made by punching a metal plate into a desired shape (unfolded shape), folding it and assembling it into a suitably small box shape, and covering the printed circuit board. However, in order to prevent noise from entering or leaking through small gaps such as corner abutting parts or terminal mounting areas during assembly, the small gaps must be sealed with solder or caulking. will be done. Such assembling and sealing work requires precision and high skill and is extremely troublesome, which increases the mental burden on the workers and causes a rise in manufacturing costs.
本考案は上記実状に鑑みなされたもので、上記
カバー部材を体積固有抵抗値及びシールド効果が
特定された導電性合成樹脂により入出力用接続端
子等も含んで一体成型することにより、高周波コ
ンバーターとしての適正の増大並びにその製造の
簡略化及びコストの低減化を図らんとするもので
ある。 The present invention was developed in view of the above-mentioned circumstances, and by integrally molding the cover member including input/output connection terminals etc. from a conductive synthetic resin whose volume resistivity and shielding effect have been specified, it can be used as a high-frequency converter. The purpose is to increase the suitability of the material, simplify its manufacture, and reduce its cost.
（問題点を解決する為の手段及び実施例）
上記目的を達成する為の本考案の構成を添付の
実施例図に基づき説明するに、第１図は本考案カ
バー部材が採用された高周波コンバーターの一実
施例を示す平面図、第２図は第１図の−線縦
断面図である。即ち、本考案の高周波コンバータ
ー用カバー部材は、高周波用電子部品１１，１２
…等を実装したプリント基板１の外周を覆うカバ
ー部材２であつて、該カバー部材２が、入出力用
接続端子を有し、体積固有抵抗値10-3〜100Ω・
cm、500MHzに於けるシールド効果が電界で30dB
以上、磁界で25dB以上である導電性合成樹脂に
より入出力用接続端子２１，２２…等も含んで一
体成型されて成ること特徴とするものである。(Means and Embodiments for Solving the Problems) The structure of the present invention for achieving the above object will be explained based on the attached embodiment diagrams. Fig. 1 shows a high frequency converter in which the cover member of the present invention is adopted. FIG. 2 is a plan view showing one embodiment of the present invention, and FIG. 2 is a vertical sectional view taken along the line -- in FIG. That is, the high frequency converter cover member of the present invention covers the high frequency electronic components 11 and 12.
A cover member 2 that covers the outer periphery of a printed circuit board 1 on which... etc. are mounted, the cover member 2 has input/output connection terminals, and has a volume resistivity value of 10 -3 to 10 0 Ω・
cm, shielding effect at 500MHz is 30dB in electric field
As described above, the device is characterized in that it is integrally molded, including the input/output connection terminals 21, 22, etc., from a conductive synthetic resin having a magnetic field strength of 25 dB or more.
図は、ビデオ装置等の背面に装着される高周波
コンバーターを例に採つたものであり、カバー部
材２にはアンテナからの入力用接続端子２１、テ
レビ受像機への出力用接続端子２２及びビデオ装
置への出力用接続端子２３が形成されている。こ
れら接続端子２１，２２及び２３は、いずれも導
電性合成樹脂にてカバー部材２と共に一体成型さ
れて該カバー部材２に対し電気的導通状態とされ
た筒状部２１０，２２０，２３０より成り、該筒
状部２１１，２２０，２３０内に絶縁体２１１，
２２１，２３１を介して端子ピン２１２，２２
２，２３２が圧入一体とされ、これら端子ピン２
１２，２２２，２３２の基端部がプリント基板１
の所定位置に固着されている。これらのうち接続
端子２１及び２２は通称Ｆ型栓座と呼ばれるもの
であり、アンテナコード及びテレビ用コードに接
続され、その接続状態に於いては各コードの中心
線材と上記端子ピン２１２，２２２と、コードの
導電性外被と上記筒状部２１０，２２０とが夫々
電気的に導通状態とされる。一方接続端子２３は
フオノジヤツクと称されるものであり、ビデオ用
コードと上記同様に接続されるものである。 The figure shows an example of a high-frequency converter attached to the back of a video device, etc., and the cover member 2 has a connection terminal 21 for input from an antenna, a connection terminal 22 for output to a television receiver, and a connection terminal 22 for output to the video device. An output connection terminal 23 is formed. These connection terminals 21, 22, and 23 are all composed of cylindrical portions 210, 220, 230 made of conductive synthetic resin and integrally molded with the cover member 2 and electrically connected to the cover member 2, An insulator 211,
Terminal pins 212, 22 via 221, 231
2, 232 are integrally press-fitted, and these terminal pins 2
The base end of 12, 222, 232 is the printed circuit board 1
is fixed in place. Of these, the connecting terminals 21 and 22 are commonly called F-type plug seats, and are connected to the antenna cord and the television cord, and in the connected state, the center wire of each cord and the terminal pins 212, 222 The conductive jacket of the cord and the cylindrical portions 210 and 220 are electrically connected to each other. On the other hand, the connection terminal 23 is called a phono jack, and is connected to a video cord in the same manner as described above.
カバー部材２を構成する導電性合成樹脂は、
ABS樹脂、ポリプロピレン樹脂、変性ポリフエ
ニレンエーテル樹脂、ポリブチレンテレフタレー
ト樹脂、ナイロン樹脂及び、ポリスチレン樹脂等
に、特殊カーボン、グラフアイト、カーボン繊
維、金属繊維及び金属粉等の導電性フイラーを単
独で若しくは複数組合せ適量混練して調製される
もので、該樹脂は射出成型法等により所望形状に
成型される。これら導電性フイラーのうち特殊カ
ーボンと金属繊維とを組み合わせたものが体積固
有抵抗値が小さく且つ安定しており、最も好まし
く採用される。斯かるカバー部材２の電気的必要
特性は、JIS Ｋ−6911に準拠して求められる体積
固有抵抗値が10-3〜100Ω・cm、シールド効果
（500MHz）が電界で30dB以上、磁界で25dB以上
であり、この必要特性を具備するよう上記導電性
フイラーの選定及び合成樹脂との配合割合の適正
化がなされる。この場合、体積固有抵抗値を
10-3Ω・cmより小さくしても必要な導電性能及び
シールド効果に大差がなく、一方100Ω・cmより
大きい場合は所望の導電性能及びシールド効果が
得られなくなる。又、電界シールド効果及び磁界
シールド効果が夫々30dB未満及び25dB未満の場
合、シールド効果が十分ではない。 The conductive synthetic resin constituting the cover member 2 is
ABS resin, polypropylene resin, modified polyphenylene ether resin, polybutylene terephthalate resin, nylon resin, polystyrene resin, etc., with conductive filler such as special carbon, graphite, carbon fiber, metal fiber, metal powder, etc. alone or It is prepared by kneading appropriate amounts of multiple combinations, and the resin is molded into a desired shape by injection molding or the like. Among these conductive fillers, a combination of special carbon and metal fibers has a small and stable volume resistivity value, and is most preferably employed. The electrical characteristics required for the cover member 2 are as follows: Volume resistivity value determined in accordance with JIS K-6911 is 10 -3 to 10 0 Ωcm, shielding effect (500MHz) is 30 dB or more in electric field, and 30 dB or more in magnetic field. It is 25 dB or more, and the conductive filler is selected and its blending ratio with the synthetic resin is optimized so as to have this necessary characteristic. In this case, the volume resistivity value is
Even if it is smaller than 10 -3 Ω·cm, there is no significant difference in the necessary conductive performance and shielding effect, while if it is larger than 10 0 Ω·cm, the desired conductive performance and shielding effect cannot be obtained. Further, when the electric field shielding effect and the magnetic field shielding effect are less than 30 dB and less than 25 dB, respectively, the shielding effect is not sufficient.
亦、プリント基板１には、高周波変換に必要な
各種電子部品等が実装されており、この電子部品
等の具体例としては、図例の如くIC１１、コン
デンサー１２、チツプ部品１３、ピーキングコイ
ル１４、トラツプコイル１５更にはチヤンネル切
替スイツチ１６等が含まれる。カバー部材２の上
面に開口された孔２４は上記切替スイツチ用のも
のであり、上記成型と同時に形成される。 In addition, various electronic components necessary for high frequency conversion are mounted on the printed circuit board 1, and specific examples of these electronic components include an IC 11, a capacitor 12, a chip component 13, a peaking coil 14, as shown in the figure. A trap coil 15 and a channel changeover switch 16 are included. A hole 24 opened in the upper surface of the cover member 2 is for the changeover switch, and is formed at the same time as the molding.
斯くして、上記プリント基板１に各種電子部品
１１，１２…等を通常の手法で実装し、一方導電
性合成樹脂の成型にて得たカバー部材２の接続端
子２１，２２及び２３に夫々端子ピン２１２，２
２１，２３１を圧入装着した後、該カバー部材２
とプリント基板１とを合体し、更に底面に金属製
カバー材３を封止的に一体固着させれば図例の如
き高周波コンバーターが得られる。 In this way, various electronic components 11, 12, etc. are mounted on the printed circuit board 1 using the usual method, and terminals are attached to the connection terminals 21, 22, and 23 of the cover member 2 obtained by molding conductive synthetic resin, respectively. pin 212,2
21, 231 are press-fitted, the cover member 2
A high frequency converter as shown in the figure can be obtained by combining the circuit board 1 and the printed circuit board 1, and further sealingly fixing the metal cover material 3 to the bottom surface.
（作用）
上記の如く本考案のカバー部材２が採用された
高周波コンバーターに於いて、各接続端子２１，
２２及び２３に所用のコードを接続すれば従来の
この種高周波コンバーターと同様の機能を奏す
る。そしてカバー部材２は導電性合成樹脂にて製
せられているから、外部からのノイズ侵入が遮断
され、プリント基板１に実装された各電子部品が
夫々正しく機能する。又、各接続端子２１，２
２，２３に接続されるコードの外皮が筒状部２１
０，２２０，２３０と完全に導通状態とされるか
ら、カバー部材２はこの筒状部２１０，２２０，
２３０及びコードの外皮を通じてアースされる。(Function) In the high frequency converter in which the cover member 2 of the present invention is adopted as described above, each connection terminal 21,
If the required cords are connected to terminals 22 and 23, the converter will perform the same function as a conventional high-frequency converter of this type. Since the cover member 2 is made of conductive synthetic resin, noise intrusion from the outside is blocked, and each electronic component mounted on the printed circuit board 1 functions properly. In addition, each connection terminal 21, 2
The outer skin of the cord connected to 2 and 23 is the cylindrical part 21
0, 220, 230, the cover member 2 is completely electrically connected to the cylindrical portions 210, 220, 230,
230 and is grounded through the outer skin of the cord.
（考案の効果）
叙上の如く、本考案の高周波コンバーター用カ
バー部材は、入出力用接続端子等も含んで導電性
合成樹脂にて一体成型されたものであるから、従
来の金属製カバー部材と同様のノイズ遮蔽効果を
有し、高周波関連器材の正常な機能を保証すると
共に、極めて簡易且つ安価に製することが出来る
ものである。特に、従来の如く打ち抜き加工して
得た金属板を組立てる場合には、コーナーの突合
せ部或は端子装着部等の小隙を封止する為に細心
の注意と高度の技倆を要したが、本考案のカバー
部材を用いるとこのような組立・封止作業は必要
とされず、製造者の精神的負担が著減されると共
にこれらが製造コストの低減化を促し安価な供給
が約束される。更に、カバー部材を構成する導電
性合成樹脂の体積固有抵抗値及びシールド効果が
上記の如く特定されているので、ノイズ遮蔽効果
が確実に保証され、特にビデオ装置用コンバータ
ーに用いた場合の適正が飛躍的に増大する。(Effects of the invention) As mentioned above, the high-frequency converter cover member of the present invention is integrally molded from conductive synthetic resin, including input/output connection terminals, etc., so it is different from conventional metal cover members. It has a noise shielding effect similar to that of the above, guarantees the normal functioning of high frequency related equipment, and can be manufactured extremely simply and at low cost. In particular, when assembling metal plates obtained by conventional punching, great care and high skill are required to seal small gaps such as corner butts or terminal mounting areas. By using the cover member of the present invention, such assembling and sealing work is not required, and the mental burden on the manufacturer is significantly reduced, which also promotes a reduction in manufacturing costs and guarantees inexpensive supply. Ru. Furthermore, since the volume resistivity and shielding effect of the conductive synthetic resin constituting the cover member are specified as described above, the noise shielding effect is reliably guaranteed, making it especially suitable for use in converters for video equipment. It increases dramatically.
このように本考案の高周波コンバーター用カバ
ー部材はその有用性極めて大である。 As described above, the high frequency converter cover member of the present invention is extremely useful.
第１図は本考案カバー部材が採用された高周波
コンバーターの一実施例を示す平面図、第２図は
第１図の−線縦断面図である。
符号の説明、１……プリント基板、１１，１２
……電子部品等、２……カバー部材、２１，２
２，２３……入出力用接続端子。
FIG. 1 is a plan view showing an embodiment of a high frequency converter employing the cover member of the present invention, and FIG. 2 is a vertical sectional view taken along the line -- in FIG. Explanation of symbols, 1...Printed circuit board, 11, 12
...Electronic parts, etc., 2...Cover member, 21,2
2, 23... Connection terminal for input/output.
Claims (1)
リント基板の外周を覆うカバー部材であつて、該
カバー部材が、入出力用接続端子を有し、体積固
有抵抗値10-3〜100Ω・cm、500MHzに於けるシー
ルド効果が電界で30dB以上、磁界で25dB以上で
ある導電性合成樹脂により入出力用接続端子等も
含んで一体成型されて成ることを特徴とする高周
波コンバーター用カバー部材。 A cover member that covers the outer periphery of a printed circuit board on which electronic components for a high-frequency converter are mounted, the cover member having input/output connection terminals, and having a volume resistivity value of 10 -3 to 10 0 Ω・cm, 500 MHz. A cover member for a high frequency converter, characterized in that it is integrally molded, including input/output connection terminals, etc., from a conductive synthetic resin that has a shielding effect of 30 dB or more in an electric field and 25 dB or more in a magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986111318U JPH025591Y2 (en) | 1986-07-18 | 1986-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986111318U JPH025591Y2 (en) | 1986-07-18 | 1986-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6318894U JPS6318894U (en) | 1988-02-08 |
| JPH025591Y2 true JPH025591Y2 (en) | 1990-02-09 |
Family
ID=30991130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986111318U Expired JPH025591Y2 (en) | 1986-07-18 | 1986-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH025591Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3071136B2 (en) * | 1995-03-07 | 2000-07-31 | シャープ株式会社 | Terminal structure and universal LNB using this |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939997B2 (en) * | 1978-04-18 | 1984-09-27 | 株式会社日立製作所 | DC motor braking control device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5257502U (en) * | 1975-09-29 | 1977-04-26 | ||
| JPH0225280Y2 (en) * | 1980-10-01 | 1990-07-11 | ||
| JPS5939997U (en) * | 1982-09-04 | 1984-03-14 | 日本電信電話株式会社 | Device to prevent radio waves from entering the terminal |
-
1986
- 1986-07-18 JP JP1986111318U patent/JPH025591Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5939997B2 (en) * | 1978-04-18 | 1984-09-27 | 株式会社日立製作所 | DC motor braking control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6318894U (en) | 1988-02-08 |
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