JPH032330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an LC composite element suitable for use as a line filter element for protecting electronic circuit components such as a CPU, TTL, and C-MOS from noise on a power supply line.

Usually, the LC composite part is made up of a combination of single coils and capacitors. Therefore, the number of parts is large and bulky, making it difficult to connect the circuit in a narrow space.

In view of this, the present invention applies the conventional manufacturing method of capacitor elements to simultaneously wind a coil around the center of the capacitor and configure it as one piece, so that one element has both the functions of a coil and a capacitor. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on illustrated embodiments.

In the figure, 1 is a winding core, and 2 and 3 are insulating films or paper, which are used as dielectric materials in the manufacture of capacitor elements. Then, a single electrode foil 4 is placed on one end of this two-ply insulating film or paper, that is, on the winding start side.
Sandwich-like. The width, length, etc. of this electrode foil 4 are determined so as to have the required capacity of the foil coil to be formed, and this electrode foil 4
Lead wires 5a and 5b, which serve as both electrodes, are provided at both ends of the lead wires 5a and 5b so as to protrude toward one end of the composite element to be wound and formed. Two insulating films or papers sandwiching the electrode foil 4 in this manner are stacked and wound around the outer periphery of the winding core 1 from one end to form a foil coil L. Further, between and above the two insulating films or papers, two electrode foils 7 and 8 are provided using these as dielectrics, and are wound concentrically around the outer periphery of the previously formed coil. A capacitor C is formed. Lead wires 6a and 6b are provided protruding from each electrode foil 7 and 8 of this capacitor, respectively. The capacitor lead wires 6a and 6b and the coil lead wires 5a and 5b were constructed as shown in the figure.
Protruding from one side of the LC composite element facilitates connection to the electronic circuit later; however, the lead wires are not limited to this as in the illustrated embodiment, and may be protruded in any direction. Good too. Furthermore, each lead wire shall be provided with markings to identify the coil and capacitor, if necessary.

Next, after concentrically winding the capacitor around the outer periphery of the coil, the winding core 1 is removed, and the ferrite core 10 is inserted into the winding core hole 9 formed at the center. In this way, one element functions as both a coil and a capacitor, but in order to protect its outer surface, it can be housed in an exterior case and filled with synthetic resin to form an integral molding, or it can be molded without using an exterior case. Then, the exterior is made by directly applying synthetic resin by dipping, etc., to make it durable for use.

According to the present invention, the coil is wound and formed in the same way as the conventional capacitor manufacturing method, and the capacitor is also wound and formed concentrically around the outer periphery, so that the coil and the capacitor are simultaneously formed in one element. Therefore, it has advantages such as easy manufacture, low bulk, and easy integration into electronic circuits.

[Brief explanation of the drawing]

Figure 1 is an explanatory view of the development during manufacturing, Figure 2 is its cross-sectional view, Figure 3 is a partially cutaway external view of the LC composite element formed by winding a capacitor around the outer periphery of the coil, and Figure 4 is FIG. 3 is an enlarged view of the broken part. 1... Winding core, 2, 3... Insulating film or paper,
4, 7, 8...electrode foil, 5a, 5b, 6a, 6b
... Lead wire, 9 ... Winding core hole, 10 ... Ferrite core, L ... Coil, C ... Capacitor.

Claims (1)

[Claims] 1. In an LC composite component consisting of a coil and a capacitor, there is a foil-like coil formed by winding one electrode and two insulating films or papers around a winding core, and this coil. A capacitor formed by wrapping two electrode foils and an insulating film or paper as a dielectric on the outer peripheral surface is concentrically integrated, and a lead wire is connected to each of the electrode foils, and a coil is connected to the capacitor. This is an LC composite element characterized by having a ferrite core inserted into the core hole formed after removing the core in the center, allowing it to function as both a coil and a capacitor. 2. A capacitor as set forth in claim 1, characterized in that a capacitor is wound around the outer circumference of a foil-like coil and is concentrically integrated and housed in an exterior case.
LC composite element. 3. The LC composite element according to claim 1, characterized in that a capacitor is wound concentrically and integrally around the outer circumference of a foil-like coil, and the outer surface is covered with synthetic resin dipping.