JPH0446570U

JPH0446570U -

Info

Publication number: JPH0446570U
Application number: JP8795190U
Authority: JP
Priority date: 1990-08-24
Filing date: 1990-08-24
Publication date: 1992-04-21

Description

[Brief explanation of the drawing]

第１図ａはこの考案の一実施例のノイズフイル
タ部分の外観を示す斜視図、第１図ｂ，ｃはそれ
ぞれ第１図ａに示す部分の表面構造、裏面構造を
示す平面図、第２図は第１図ａに示す部分におけ
る環状磁性体の埋設状態を示す断面図、第３図は
第１図に示すノイズフイルタの等価回路を示す回
路図、第４図ａ，ｂ，ｃはこの考案の一実施例の
製造方法を示す断面図、第５図、第６図はそれぞ
れこの考案の他の実施例を示す断面図、第７図は
従来のノイズフイルタの一例を示す斜視図である
。１はプリント基板、１１は導体パターン、１２
はスルホール、１３，１３ａ，１３ｂは環状磁性
体、１４は接着充填剤、１５は環状の溝、１−１
は第１の樹脂基板、１−２は第２の樹脂基板、１
１−１，１１−２は銅張面、２ａ，２ｂ，２ｃは
コンデンサである。なお、各図中同一符号は同一
または相当部分を示すものとする。 Fig. 1a is a perspective view showing the external appearance of a noise filter portion of an embodiment of this invention, Figs. 1b and c are plan views showing the front and back structures of the part shown in Fig. 1a, respectively. The figure is a cross-sectional view showing the embedded state of the annular magnetic material in the part shown in Fig. 1 a, Fig. 3 is a circuit diagram showing the equivalent circuit of the noise filter shown in Fig. 1, and Fig. 4 a, b, and c are this diagram. FIGS. 5 and 6 are cross-sectional views showing other embodiments of the invention, and FIG. 7 is a perspective view showing an example of a conventional noise filter. . 1 is a printed circuit board, 11 is a conductor pattern, 12
13, 13a, 13b are annular magnetic bodies, 14 is an adhesive filler, 15 is an annular groove, 1-1
is the first resin substrate, 1-2 is the second resin substrate, 1
1-1 and 11-2 are copper-clad surfaces, and 2a, 2b, and 2c are capacitors. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of claims for utility model registration] (1) An annular magnetic body embedded in a printed circuit board,
A chiyoke coil is formed of a plurality of conductor patterns arranged on the front surface of the printed circuit board and a plurality of conductor patterns alternately connected in series with the conductor patterns arranged on the front surface via through holes arranged on the back surface. A printed circuit board with a noise filter equipped with a noise filter as an element. (2) The printed circuit board with a noise filter according to claim 1, wherein the annular magnetic material is formed by solidifying a resin mixed with powdered magnetic material.