JPH01208819A - Line filter - Google Patents

Abstract

PURPOSE:To eliminate the need for a spring, adhesives, etc., and to shorten the production time by simultaneously winding two coil bobbins fitted to a closed magnetic circuit core and engaging a terminal board capable of mounting an insulating wall between the bobbins. CONSTITUTION:Coil bobbins 8 are incorporated to magnetic legs 7a, 7b for a ferrite core 7, and coils 11 wound on the bobbins 8 are wound by utilizing gear sections 9 and turning the bobbins 8a, 8b centering around the magnetic legs 7a, 7b. A terminal board 14 is formed so that an insulating wall 10 is positioned at the center of the bobbins 8a, 8b. When the terminal board 14 is combined with the core 7 with the bobbins 8 on which the coils 11 are wound, the insulating wall 10 is shaped between the coils 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a line filter used to eliminate noise in power lines of various electrical products that comply with safety standards.

2. Related Art Conventionally, as shown in FIGS. 6a and 6b, there has been a structure in which a mouth-shaped ferrite core 3 incorporating a coil bobbin 2 with a coil 4 wound thereon is placed horizontally on a terminal plate 1, and a structure as shown in FIGS. The configuration was such that a ferrite core 5 in the shape of an opening as shown in FIG.

Problems to be Solved by the Invention However, with such a structure, the winding space of the coil 4 is halved relative to the square-shaped ferrite core 3 in the case shown in FIG. was low. In addition, in the case of FIGS. 6 and 7, it takes a lot of time to wind the coils 4 on the bobbin 6 separately, and it takes a lot of time to fit the ferrite core 6 and the bobbin 6 together. . Furthermore, since the ferrite core 6 is divided into two parts, the loss is also large compared to the closed magnetic circuit.

Means for Solving the Problems Therefore, the line filter of the present invention has two closed magnetic circuit cores that can improve the efficiency of characteristics within a closed magnetic core with a certain magnetic path length and at the same time shorten manufacturing time. Two bobbins are provided, wires can be wound simultaneously on the two bobbins, and the bobbins are fixed by fitting with a terminal plate having an insulating wall between the coil bobbins.

Effect With the above configuration, two coil bobbins fitted to the closed magnetic circuit magnetic core are wound at the same time, and by fitting a terminal plate that allows an insulating wall to be installed between the two coil bobbins, the core and The coil bobbin is fixed, eliminating the need for springs, adhesives, etc., and shortening manufacturing time.

Embodiment FIG. 1 is an exploded perspective view of a line filter according to an embodiment of the present invention, FIGS. 2 and 3 are assembled views, and FIG. 4 is a perspective view of a completed product.

In Figures 1 to 4, 7 is a ferrite core made by molding ferrite powder into a mouth shape and sintering it.The magnetic legs 71L and 7b of this ferrite core 7 are divided into two parts, which are assembled together. A coil bobbin 8 having a plurality of flanges and a plurality of winding grooves is incorporated therein. A gear portion 9 is formed at one end of the coil bobbin 8 .

A coil 11 is wound around this coil bobbin 8.
After the coil bobbin 8 is assembled into the ferrite core 7, this coil 11 is assembled into a coil bobbin EIL using the gear part 9.
, ab are wound around the magnetic legs 7&, 7b.

The coil bobbins sa, s around which the coil 11 is wound in this way
A terminal plate 14 is formed on the ferrite core 7 into which the coil bobbins sa and ab are incorporated, such that an insulating wall 10 is located at the center of the two coil bobbins sa and ab. This terminal 14 has a coil 11
A terminal 12 for connecting a lead wire is implanted, and grooves 13a and 13b are provided on both sides of the inner side 1 into which the gear portion 9 and collar portions ga and gb of the coil bobbin 8 fit.

Coil bobbin 8 around which coil 11 is wound with such a configuration
When the terminal plate 14 is combined with the ferrite core 7 having a ferrite core 7, the result is as shown in FIG. 4, and an insulating wall 1o is formed between the coils 11.

In the above embodiment, the square-shaped ferrite cores 7 are shaped to be parallel to the substrate, but they can be arranged vertically by changing the positions of the terminals 12.

Effects of the Invention The present invention provides a structure in which the gears of the two coil bobbins mesh with each other when the gears are installed in the magnetic legs of the closed magnetic circuit core. It is possible to wind two coil bobbins at the same time.

In addition, by installing the terminal plate so that the insulating wall is located in the center of the two coil bobbins, it is possible to increase the efficiency of the winding area, etc. within the closed magnetic path core with a constant magnetic path length. Furthermore, since the terminal plate is formed with a groove into which the gear part and collar part of the bobbin can be fitted, rotation and rattling of the coil bobbin are prevented, and adhesives are not required.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a line filter according to an embodiment of the present invention, Fig. 2 is an assembled view of the coil bobbin and ferrite core of Fig. 1 fitted together, and Fig. 3 shows the components of Fig. 2 and the terminal plate. 4 is a perspective view of a completed line filter according to an embodiment of the present invention, FIGS. 6a and 6b are side and front views of a conventional line filter, and FIGS. 6 and 7 are assembled views. FIG. 3 is a front view of another conventional line filter. 7...Closed magnetic circuit ferrite core, 71L, 7b
...Magnetic leg, El, 8b...Coil bobbin, 9...Gear, ga, gb...Brim, 10...Insulating wall, 11・・・・・・Coil, 1
2...Terminal, 132L113b...Fitting groove, 14...Terminal board. Name of agent: Patent attorney Toshio Nakao and 1 other person7.
- Closed magnetic circuit ferrite layer l (? - Gears 9a, 9b - Shiba 10 - Insulating wall t4 - Hatoko branch Fig. 2 Fig. 3 Fig. 4 Fig. 5 b Fig. 6 Fig. 7

Claims (2)

[Claims] (1) A coil bobbin with flanges at both ends is divided into two in the same direction as the magnetic core, which is composed of a closed magnetic circuit, and the two are fitted together using the divided parts.A gear is provided in advance in the flanges, and each of the coil bobbins is A line filter in which two bobbins are fitted to a magnetic core so as to mesh with each other, and a gear rotated by a drive source is rotated around the gear part and wound at the same time to form a coil. (2) The line filter according to claim 1, wherein a terminal plate having an insulating wall is fitted and fixed in the center of two coil bobbins around which the coils are wound.