JPH0332824U

JPH0332824U -

Info

Publication number: JPH0332824U
Application number: JP9335589U
Authority: JP
Priority date: 1989-08-07
Filing date: 1989-08-07
Publication date: 1991-03-29

Description

[Brief explanation of drawings]

第１図は本考案によるノイズフイルタでπ型ノ
イズフイルタを構成した時の図で、第１図ａは内
部構造を示す平面図で、一点鎖線は樹脂成形部を
示す。第１図ｂは内部構造を示す正面図で、一点
鎖線は樹脂成形部を示す。第１図ｃは樹脂成形し
た後のノイズフイルタの平面図、第１図ｄは樹脂
成形したノイズフイルタの正面図。第２図は本考
案によるノイズフルタの電気等価回路を示し、第
２図ａはＬ型ノイズフイルタ、第２図ｂはπ型ノ
イズフイルタ。第３図は本考案によるノイズフイ
ルタに使用するフエライトコアの形状を示す図で
、第３図ａは平面図、第３図ｂは正面図。第４図
は従来のπ型ノイズフイルタの構成を示す斜視図
である。１……フエライトコア、２……信号ライン端子
用導線、３……接地用端子導線、４……接続点、
５……外板（樹脂、塗装）、６……π型ノイズフ
イルタ、３１……フエライトコア、３２……貫通
孔、３３……取付け穴、４１……円筒状フエライ
トコア、４２……コンデンサ、４３……導線、４
４……接地用端子導線。 FIG. 1 is a diagram when a π-type noise filter is constructed using the noise filter according to the present invention. FIG. FIG. 1b is a front view showing the internal structure, and the dashed line indicates the resin molded part. FIG. 1c is a plan view of the noise filter after resin molding, and FIG. 1d is a front view of the resin molded noise filter. FIG. 2 shows an electrical equivalent circuit of a noise filter according to the present invention, in which FIG. 2a shows an L-type noise filter, and FIG. 2b shows a π-type noise filter. FIG. 3 is a diagram showing the shape of a ferrite core used in a noise filter according to the present invention, where FIG. 3a is a plan view and FIG. 3b is a front view. FIG. 4 is a perspective view showing the configuration of a conventional π-type noise filter. 1... Ferrite core, 2... Signal line terminal conductor, 3... Grounding terminal conductor, 4... Connection point,
5... Outer plate (resin, paint), 6... π-type noise filter, 31... Ferrite core, 32... Through hole, 33... Mounting hole, 41... Cylindrical ferrite core, 42... Capacitor, 43... Conductor, 4
4... Grounding terminal conductor.

Claims

[Scope of utility model registration request]

Oval columnar shape with semicircular end faces at both ends,
Alternatively, parallel to the columnar side surface of a rectangular parallelepiped soft magnetic ferrite core, circular through holes are provided at two locations on both sides on the center line of the end surface, and a circular mounting hole is provided in the middle of the end surface, and U-shaped holes are provided in the through holes on both sides of the ferrite core. In an inductor constructed by inserting the signal line terminal conductor and burying the grounding terminal conductor in the mounting hole in the center of the end face of the ferrite core, the signal line terminal conductor passes through the through hole and the grounding terminal conductor is installed in the center mounting hole. A noise filter is characterized in that a capacitor is connected between the rear ferrite core, a U-shaped signal line terminal conductor, a grounding terminal conductor, and the capacitor, which are sealed and integrally molded with resin.