JPH0774025A - Line filter - Google Patents

Abstract

(57) [Abstract] [Purpose] Adhesion in the winding process of the J-shaped core equipped with a cylindrical bobbin can be omitted, and the insulating base can be partially vertically and horizontally used to reduce material costs. [Structure] Protrusion pieces 14 and 1 for fitting together an insulating base with pin terminals, which is combined with the date-shaped core 4 and the cylindrical reel 1 integrated product.
7 and a core holding frame 6 having fitting recesses 10 and 11 and terminal blocks 12 and 16, and an enlarged portion 8 is provided on a free end side of an insulating plate 7 protruding from the core holding frame 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a line filter in which a common mode choke coil using a date-shaped ferrite core and a split type cylindrical winding frame is mounted on a substrate.

[0002]

2. Description of the Related Art A cylindrical winding frame is attached to a rod-shaped magnetic leg of a closed magnetic circuit core, and the winding can be automatically wound by rotating the winding frame. A common mode choke coil in which a split type cylindrical winding frame having compartments is mounted and two windings are made is used as a line filter. With the core wound as a line filter with the winding still wound on the cylindrical bobbin, in the case of horizontal installation as well as in the case of vertical installation with the core vertically and the central magnetic leg horizontal, fix it to the substrate etc. Is difficult and the treatment of the ends of the windings is cumbersome.
Therefore, conventionally, the one with a cylindrical winding frame attached to the core,
An insulating plate for the core and winding is integrally formed, and winding is performed in combination with an insulating base with pin terminals installed vertically, and after winding the ends of the winding to the pin terminals, glue the core to the insulating base. Then, the barbed portion was soldered to form a board-mounted line filter.

[0003]

Since the conventional insulating base has a structure in which the insulating plate is inserted into the gap between the outer circumference of the winding frame and the core, the core and the winding frame are held together to form the winding. It can be done, but since the core rattles on the insulating base, it is necessary to fix the core to the insulating base with an adhesive after winding, it takes a long time for the bonding work, and it is difficult to apply the adhesive. There was a drawback that the filter did not look good. Further, conventionally, two types of insulating bases, which are horizontal and vertical, are procured, and the unit price of the insulating bases is high, so there is a problem that the procurement cost is large.

[0004]

A line filter according to the present invention solves the above-mentioned problems, in which an insulation base with pin terminals to be combined with an integrated product of a date-shaped core and a cylindrical winding frame is fitted to each other. It is characterized in that it is divided into a core holding frame provided with a projecting piece and a fitting concave portion and a terminal block, and an enlarged portion is provided on a free end side of an insulating plate integrally projecting on the core holding frame. Here, the enlarged portion refers to a portion that is raised from the flat portion along the free end side of the plate-shaped insulating plate.

[0005]

[Function] In the core holding frame, the insulating plate holds the core / winding frame integrated product by pressing it into the gap between the core and the winding frame of the core / winding frame integrated product, and holds the core / winding frame integrated product in the horizontal or vertical position By assembling with the projecting piece and the concave part, it becomes a required insulating base with pin terminals. The insulating plate of the core holding frame insulates the core from the winding, and the enlarged portion engages with the core to fix the core to the holding frame.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vertically placed line filter according to the present invention is shown in an exploded perspective view in FIG.

In FIG. 1A, a cylindrical bobbin (hereinafter abbreviated as a bobbin) 1 is a cylindrical bobbin (hereinafter abbreviated as a bobbin).
Two circular brims are integrally provided on the outer circumference of 2, and these circular brims are equally divided and arranged in parallel with the axis of the winding core 2. The gear 3 is formed on the central circular brim, and the date-shaped core is formed. (Hereinafter, abbreviated as a core) 4 is attached to a central magnetic leg 5 to form a core 4 and a reel 1.
It becomes an integrated product.

Core holding frame (hereinafter, abbreviated as holding frame) 6
Is a rectangular frame corresponding to the outer shape of the core 4. An insulating plate 7 is integrally provided on one surface of the holding frame 6 along the inner side edge of the opposing side parallel to the central magnetic leg 5, and an enlarged portion 8 is provided at the tip of the insulating plate. A plurality of grooves 9 communicating from the inside to the outside of the holding frame 6 are provided on the other surface, and fitting recesses (fitting holes in the drawing) 10 are provided at the four corners. Fitting recesses 11 are provided at both ends of both outer side surfaces (one is shown in the figure) of the holding frame 6 parallel to the insulating plate 7. Insulating plate 7 protruding from the holding frame 6
The protruding height (length) is slightly larger than the height H of the core 4, and the width of the flat portion below the enlarged portion 8 is substantially the same as the height H of the core 4.

The terminal block 12 is a square thick plate for vertical installation and has the same side length as the outer dimension of the central magnetic leg 5 of the core 4 in the lengthwise direction and the same side length as the diameter of the circular flange of the reel 1. With a 4 on the bottom
(Two shown) pin terminals 13 are vertically provided, two projecting pieces 14 corresponding to the fitting recesses 11 are integrally provided on the upper surface, and grooves 15 corresponding to the grooves 9 of the holding frame 6 are formed on both side surfaces. It is provided in.

In the integrated product of the holding frame 6, the core 4 and the bobbin 1, the enlarged portion 8 of the insulating plate 7 is provided in the gap between the outer periphery of the circular flange of the bobbin 1 and the core 4, from the left front side to the right back side in the figure. You can force it through and become one. The enlarged portion 8 prevents the core 4 from coming off the holding frame 6.

A three-piece integrated product of the core 4, the winding frame 1 and the holding frame 6 is provided with a protruding piece 14 of the terminal block 12 in a fitting recess 11 of the holding frame 6 [a lower outer surface not shown in FIG. 1 (a)]. It can be fitted and integrated with the terminal block 12.

A four-piece integrated product of the core 4, the winding frame 1, the holding frame 6 and the terminal block 12 is mounted in a winding device to perform winding, and the ends of the winding are passed through the groove 9 and the groove 15 communicating with each other. It is possible to make a vertical line filter by entwining it with the pin terminal 13.

FIG. 1B shows the appearance of an embodiment of the terminal block 16 for the line filter placed horizontally, together with the core holding frame 6 shown in FIG. 1A.

The terminal block 16 is a U-shaped thick plate corresponding to one side of the holding frame 6 with the insulating plate 7 and two sides without the insulating plate 7. Four pin terminals 13 are vertically provided on the bottom surface of the terminal block 16, and projecting pieces 17 are provided at both corners and both ends on the top surface.
The protrusion 17 is a fitting recess 10 of the holding frame 6 [see FIG. 1 (a)].
Is an array corresponding to.

The core 4, the winding frame 1, the holding frame 6, and the terminal block 16 are wound in the same manner as in the case of the vertical installation described above in the four-piece integrated product.
You can create a horizontal line filter. In the case of horizontal installation, the ends of the windings are not guided through the grooves 9 of the holding frame 6, but are directly guided from the winding frame 1 to the pin terminals 13 and twisted.

In both the vertical installation and the horizontal installation, the assembly of the holding frame 6 and the terminal block 12 or the terminal block 16 becomes firm due to the winding of the ends of the winding, so that the holding frame 6 is secured. It is not necessary to bond the terminal block 12 and the terminal block 16 together.

[0017]

According to the present invention, since the line filter can be assembled by omitting the adhesive, the assembly time can be shortened as compared with the conventional one, and the appearance of the line filter can be improved, and the holding frame can be further obtained. Since the terminal block with a low unit price is dedicated for both vertical and horizontal installation, the material procurement cost can be significantly reduced and the material cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, FIG. 1 (a) is an external view showing a case of vertical installation, and FIG. 1 (b) shows a terminal block in the case of horizontal installation. It is an external view shown with the core holding frame shown to Fig.1 (a).

[Explanation of symbols]

 1 Cylindrical winding frame 2 Cylindrical winding core 3 Gear wheel 4 Day-shaped core 5 Central magnetic leg 6 Core holding frame 7 Insulating plate 8 Enlarged part 9,15 Groove 10,11 Fitting recess (fitting hole) 12 Terminal block (for vertical installation) ) 13-pin terminal 14,17 Projection piece 16 Terminal block (for horizontal installation) H Height of H-shaped core

Claims (1)

[Claims] 1. A line filter in which a date-shaped core having a cylindrical winding frame attached to a central magnetic leg is fixed to an insulating base with pin terminals, and two windings are formed on the cylindrical winding frame, wherein the pin terminals are provided. The attached insulating base is divided into a core holding frame having projecting pieces and recesses for fitting with each other and a terminal block, and an insulating plate for the core and the winding is integrally provided on the core holding frame so as to project. A line filter characterized in that an enormous portion is provided on the free edge of the plate.