JPS6317513A - Lc filter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a coupled LC filter using a combination of a coil and a chip capacitor.

BACKGROUND OF THE INVENTION In recent years, with the miniaturization of each 8i electrification amount, there has been a growing demand for miniaturization of [C filters]. Additionally, with the increase in the number of reflowable parts, there has been a growing demand for reflowable LC filters. Among these, LC filters have met the above requirements by changing the shape of the bobbin, the shape of the terminals, the type of copper wire, the shape of the chip capacitor, etc.

Hereinafter, the above-mentioned conventional LC filter will be explained with reference to the drawings. 4 and 5 show top and side views of conventional LC filters. Figures 4 and 5
In the figure, reference numeral 1 denotes a collar having a recess 3 on the top for storing a chip capacitor 2. A plurality of collars are arranged on a coaxial bobbin 4, and a winding groove 5 is formed between the collars 1 (the coil is omitted). ). 6 is a terminal embedded in the collar 1, and 7 is a collar provided in the recess 3 for fixing the chip capacitor 2.

The operation of the LC filter configured as described above will be explained below. In conventional LC filters, a round terminal 6 is used due to problems with the processing of the thermoplastic resin bobbin and the structure of the mold, and the coil is wound with #14IQ around this terminal 6 until it is fully wound. 5 to form an inductance, and the chip capacitor 2 has its electrode portion 2a soldered to a lead wire wound around a terminal 6 to form a capacitance, thereby forming an LC filter.

Problems to be Solved by the Invention However, with the increasing demand for smaller bobbins, implanting terminals in the brim means making the brim wider and the bobbin larger. It wasn't something. Further, round terminals are not suitable for reflow type LG filters.

The present invention solves the above problems, and aims to provide a flow-type LC filter that is more compact.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a coaxial bobbin having a plurality of pots arranged in the length direction, each having a concave portion in the upper part for storing a chip capacitor. flat terminals are disposed along the plane and have upper end portions facing each other, and the chip capacitor is disposed between the upper end portions of the flat terminals with its electrode portion pressed against the upper end portion; The lead wire of the coil wound between the ribs is soldered to the upper end of the flat terminal.

Effect With the above structure, it is possible to connect a chip capacitor and a terminal using the flat terminal provided on the side of the brim without planting a terminal in the brim, and the width of the brim can be reduced.
The filter can be made smaller.

EXAMPLE An example of the present invention will be described below based on the drawings.

FIG. 1 shows a top view of an LC filter that is an embodiment of the present invention, FIG. 2 shows a side view, and FIG. 3 shows a sectional view. In FIG. 1, FIG. 2, and FIG. 3, 11 is a coaxial bobbin;
A plurality of collars 14 each having a recess 13 for storing a chip capacitor 12 in the upper portion thereof are disposed, and a winding groove 16 in which a coil 15 is wound is formed between the collars 14 . The flat terminals 17 are arranged along both sides of the collar 14, and
The chip capacitor 12 has its electrode portion 12a pressed against the upper end portion of the capacitor 12 facing each other to form a m1iff, and the lead 818 of the coil 15 is soldered to the upper end portion of the flat terminal 17 to form an LC filter. It is formed.

As described above, according to this embodiment, the flat terminal 17 is provided on the side surface of the bag 14.
By providing this, it is possible to press and connect to the electrode part 12a of the capacitor 12 without being implanted in the terminal bar 14 like a round shape, so that the width of the terminal bar 11 can be reduced. The LC filter can be made smaller and can also be easily reflowed.

Effects of the Invention According to the present invention, by disposing flat terminals on both sides of the brim, the electrode portion of the chip capacitor can be pressure-connected between the upper ends of the flat terminals without having to install round terminals in the brim. Therefore, the width of the brim can be reduced, and the LC filter can be made smaller. Furthermore, by providing flat terminals on both sides of the brim, a reflow type LC filter can be formed.

[Brief explanation of the drawing]

Fig. 1 is a top view of an LC filter showing an embodiment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a front view of the same, and Fig. 4 is a bobbin of a conventional LC filter containing a chip capacitor. The top view and FIG. 5 are side views of the same. 11... Bobbin, 12... Chip capacitor, 12
a... Electrode part, 13... Concave part, 14... Brim, 1
5... Coil, 16... Winding groove, 17... Flat terminal representative Hiroshi Tsuru Morimoto Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A flat terminal comprising a coaxial bobbin having a plurality of flanges arranged in the length direction, each having a concave portion in the upper part for storing a chip capacitor, and arranged along both sides of the flanges, with the upper ends facing each other. The chip capacitor is disposed between the upper end portions of the flat terminals with its electrode portion pressed into contact with the upper end portions, and a lead wire of a coil wound between the ribs is attached to the upper end portion of the flat terminal. LC soldered with
filter.