JPH0331069Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an LC composite part, and particularly to an LC composite part suitable for use as a filter.

(Prior art) Conventional LC composite parts are shown in Figures 4 and 5, for example.
As shown in the figure, a U-shaped lead wire 3 is soldered to a first electrode 2 formed on the surface of a single dielectric substrate 1 so that both ends thereof extend along both ends. Bead cores 4 and 5 are provided at both ends by passing through their narrow through holes 6 and 7, respectively, and leads to a second electrode 8 opposite to the first electrode 2 formed on the back surface of the dielectric substrate 1. The wires 9 were connected by soldering, and the whole was covered with an insulating sheathing material (not shown).

However, in this type of conventional LC composite component, there was a problem in that the thickness of the bead cores 4 and 5 caused unevenness on the surface of the dielectric substrate 1, which was unfavorable in appearance. Furthermore, when connecting the lead wire 3 to the first electrode 2 on the surface of the dielectric substrate 1 by soldering, the lead wire 3 must be formed so as to come into contact with the electrode 2, and the dielectric substrate 1 is immersed in a molten solder bath or the like for solder connection, most of the lead wires 3 that pass through the bead cores 4 and 5 are floating from the board, so the force to hold the board is weak, and the board It also had the problem of falling, and its assembly was complicated, making it unsuitable for mass production.

(Purpose of the invention) The present invention was made in view of the above points, and aims to provide an LC composite part that does not have any uneven appearance, is easy to assemble, and is excellent in mass production. This is the purpose.

(Summary of the invention) The invention is characterized in that an inductor is formed by fitting a magnetic core into a magnetic core accommodating portion formed on a dielectric substrate and passing a lead wire through the magnetic core. It is something to do.

(Example) An example of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front perspective view of an LC composite component according to an embodiment of the present invention, and FIG. 2 is a back perspective view thereof.

In these figures, 10 is a rectangular dielectric substrate, and 11 and 12 are first and second notches provided at opposing ends of this dielectric substrate 10, respectively. These notches 11, 12
forms a magnetic core housing section. 13 is
A first protrusion 14 formed by providing the first notch 11 is a second protrusion formed by providing the first notch 11,
15 is a third protrusion formed by providing the second notch 12, and 16 is a fourth protrusion formed by providing the second notch 12.
This is the protrusion.

17 and 18 are first and second magnetic cores fitted into the first and second notches 11 and 12, and 19 and 20 are respectively inserted into these first and second magnetic cores 17 and 18. This is a through hole provided.

21 is a first divided electrode formed on the surface of the dielectric substrate 10; 22 is a second divided electrode formed on the surface of the dielectric substrate 10 including the second protrusion 14; 23, A fourth layer is formed on the surface of the dielectric substrate 10.
This is a third divided electrode formed including a protrusion 16.

24 denotes each of the divided electrodes 21, 22 and 23.
The input/output terminals are formed by U-shaped lead wires that are connected to the magnetic cores 17 and 18 by soldering or the like and that pass through the magnetic cores 17 and 18, respectively. This lead wire 24
The free end side thereof extends outward from one end side of the substrate 10.

25 is a common electrode formed on the back surface of the dielectric substrate 10 so as to face each of the divided electrodes 21, 22, and 23; 26 is a common electrode formed on the back surface of the dielectric substrate 10;
One terminal is connected by solder or the like, and the other terminal (free end side) is a lead wire forming a ground terminal extending in the same direction as the lead wire 24 forming the input/output terminal.

The LC composite component thus formed forms the equivalent circuit diagram shown in FIG. Terminals a and b in FIG. 3 are at both drawn ends of the lead wire 24 forming the input/output terminals in the above embodiment, and terminal c is
They each correspond to the lead-out ends of the lead wires 26 forming the ground terminals.

It goes without saying that the LC composite component of the present invention is not limited to those of the above embodiments, and may be modified as appropriate without changing the gist.

In the above embodiments, the magnetic core used is cylindrical, but may have other shapes such as prismatic.

Furthermore, in the above embodiments, the notches forming the magnetic core accommodating portions are each provided in the shape of an opening at the edge of the dielectric substrate.
It does not necessarily have to be in the form of an opening, and may be formed in the form of a through hole.

Further, in the LC composite component of the above embodiment, the outer periphery may be molded with an insulating resin or the like, if necessary.

(Effects of the invention) As explained above, the LC composite part of the invention has
By fitting the magnetic core into the magnetic core accommodating portion formed on the dielectric substrate, large irregularities do not occur on the front and back sides of the dielectric substrate, and furthermore,
With this magnetic core accommodated in the magnetic core accommodating portion, the lead wire passes through the through hole provided in the magnetic core to form an inductor, so that most of the lead wire is Since the lead wires are placed in contact with the substrate, the lead wires can easily hold the board without forming the lead wires as in the conventional method. Therefore, when connecting lead wires and electrodes with solder, etc., the problem of the board falling even when immersed in a molten solder tank is solved, and the assembly is easy and suitable for mass production. It became.

[Brief explanation of drawings]

FIG. 1 is a front perspective view of an LC composite component according to an embodiment of the present invention, FIG. 2 is a rear perspective view thereof, FIG. 3 is an equivalent circuit diagram of the LC composite component, and FIG.
FIG. 5 is a perspective view of the front side of a conventional LC composite component, and FIG. 5 is a perspective view of the back side thereof. 10... Dielectric substrate, 11, 12... Notch, 13, 14, 15, 16... Protrusion, 17, 1
8...Magnetic core, 19, 20...Through hole, 2
1, 22, 23... divided electrode, 24, 26... lead wire, 25... common electrode.

Claims (1)

[Scope of Claim for Utility Model Registration] A plate-shaped dielectric substrate is held between one U-shaped lead wire with a magnetic core inserted through both ends thereof and one earthing lead wire. In the LC composite component, the plate-shaped dielectric substrate has three divided electrodes on the front surface, one common electrode facing the three divided electrodes on the back surface, and a magnetic core at opposing ends. first and second notches are formed for accommodating the one U-shaped lead wire connected to the three divided electrodes;
and two magnetic cores that are held between the one grounding lead wire connected to the one common electrode and further inserted through both ends of the one U-shaped lead terminal. are respectively housed in the notches.