JPH01125595U

JPH01125595U -

Info

Publication number: JPH01125595U
Application number: JP16550987U
Authority: JP
Priority date: 1987-10-29
Filing date: 1987-10-29
Publication date: 1989-08-28

Description

[Brief explanation of the drawing]

第１図は本考案の原理を示した概念図であり、
第２図は第１図に示す本考案の概念図を具体化し
た構造図である。１……保護継電器外箱、２……遮へい箱体、３
……電源端子、４……信号入力端子、５……接地
端子、１０……１号用貫通コンデンサ、１１……
１号用基準電位線、１３……１号電源回路、１４
……信号変換回路、１５……１号演算増幅回路、
１６……ホトカプラ、１８……１号用入出力線、
１９……１号信号出力端子、２０……２号用貫通
コンデンサ、２１……２号用基準電位線、２２…
…２号用取付板、２３……２号電源回路、２５…
…２号演算増幅回路、２８……２号用入出力線、
２９……２号信号出力端子、３１……端子台、３
２……絶縁棒、３３……小孔、３５……２号用プ
リント板、３６……プリント板絶縁台。 Figure 1 is a conceptual diagram showing the principle of the present invention.
FIG. 2 is a structural diagram embodying the conceptual diagram of the present invention shown in FIG. 1. 1... Protective relay outer box, 2... Shielding box body, 3
... Power supply terminal, 4 ... Signal input terminal, 5 ... Ground terminal, 10 ... No. 1 feedthrough capacitor, 11 ...
Reference potential wire for No. 1, 13... No. 1 power supply circuit, 14
... Signal conversion circuit, 15 ... No. 1 operational amplifier circuit,
16...Photocoupler, 18...I/O line for No. 1,
19...No.1 signal output terminal, 20...Feedthrough capacitor for No.2, 21...Reference potential line for No.2, 22...
...Mounting plate for No. 2, 23...No. 2 power supply circuit, 25...
... No. 2 operational amplifier circuit, 28 ... No. 2 input/output line,
29...No. 2 signal output terminal, 31...Terminal block, 3
2...Insulating rod, 33...Small hole, 35...Printed board for No. 2, 36...Printed board insulation stand.

Claims

[Claims for Utility Model Registration] (1) In a collective electronic circuit configured by aggregating a plurality of electronic circuits that perform processing such as calculation and amplification of minute electrical signals, covering the entire circumference of the collective electronic circuit, A shielding box body made of a conductive material and insulated from the earth, a feedthrough capacitor attached to this shielding box body, and a plurality of conductive materials made of a conductive material provided inside this shielding box body and insulated from each other. Feedthrough capacitor mounting plates, feedthrough capacitors mounted on these feedthrough capacitor mounting plates, and mutually insulated external electric wires introduced into the shielding box through a small hole provided in the shielding box. Prepare,
Each terminal of any of the electronic circuits described above,
It is connected to the feed-through capacitor attached to the shielding box body and drawn out of the shielding box body, and the reference potential of this arbitrary electronic circuit is connected to this shielding box body, and each terminal of the remaining electronic circuits is connected to its respective terminal. Each terminal of the remaining electronic circuit is drawn out by connecting to the external electric wire via each feedthrough capacitor attached to the feedthrough capacitor mounting plate corresponding to the electronic circuit, and each reference potential of the remaining electronic circuit is A radio wave shielding device for a collective electronic circuit, characterized in that the is connected to a feedthrough capacitor mounting plate belonging to each electronic circuit. (2) In the radio wave shielding device set forth in claim 1 of the utility model registration claim, the small hole provided in the shielding box is a hole of a size that can prevent the intrusion of radio waves and is opened in the entire surface or a part of the shielding box. A radio wave shielding device for a collective electronic circuit characterized by a small hole.