JPS60208809A - Inductor - Google Patents

Abstract

PURPOSE:To regulate characteristics of an inductor after being molded, by drawing one-ends of metal terminal plates out of a resin mold and by cutting away a portion of a collar projection of an hour-glass shaped high-frequency magnetic core as well as an outer side face of the resin mold. CONSTITUTION:Side faces of collars 5 of an hour-glass shaped high-frequency magnetic core 7 around which a coil is wound, are fastened to locking portions 10 provided on the tips of metal terminal plates 9 respectively. The coil 8 is electrically connected to a portion of the metal terminal plates 9. After the whole is covered by a resin mold 1, outwardly drawing portions 2 of the metal terminal plates 9 are bended along the side faces of the resin mold 1 respectively. After the inductor is finished, the characteristics can be regulated by cutting away little by little a portion of a collar projection 6 of the magnetic core 7 while measuring the characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to inductor parts used in various electronic devices.

(Conventional Structure and Problems thereof) In many recent chip components, circuit elements are connected to external connection terminals, and the exterior is molded with resin by molding or casting. The same applies to inductors. However, after molding or casting, the properties cannot be changed, and the product is often defective. In particular, composite products combined with capacitors often require adjustment of the resonant frequency, which has been a drawback.

OBJECTS OF THE INVENTION It is an object of the invention to provide an inductor that can be adjusted after molding or casting the inductor or a composite inductor in combination with a capacitor.

(Structure of the Invention) The inductor of the present invention includes a drum-shaped high-frequency magnetic core around which a coil is wound, and a pair of metal terminals that hold and fix the drum-shaped high-frequency magnetic core on both sides of the flange, and to which the coils are connected by wiring. A first configuration consisting of a plate and a resin molded body covering one end of the drum-shaped high frequency magnetic core and a metal terminal plate, or a capacitor is mounted inside or outside of the resin molded body, and a capacitor is attached to the inside or outside of the resin molded body, and the metal terminal plate In a second connected and composite configuration, the other end of the metal terminal plate is pulled out to the outside of the resin molded body, and a part of the flange protrusion of the drum-shaped high-frequency magnetic core is attached to the exterior side of the resin molded body. At the same time, it is removed to adjust the characteristics.

(Description of Embodiment) An embodiment of the present invention will be described based on FIGS. 1 to 4.

FIG. 1 is a perspective view of an inductor according to the invention. In the figure, 1 is a resin molded body, 2 is an external lead-out portion of a metal terminal plate, and 3 is a cutout portion cut out to adjust inductance.

FIG. 2 is a plan view of a drum-shaped high-frequency magnetic core used in the inductor of the present invention. In the figure, 4 is a winding core, 5 is a flange, and 6 is a flange protrusion.

FIG. 3 is a cross-sectional view of the inductor of the present invention.

In the figure, 7 is a drum-shaped high-frequency magnetic core, 8 is a coil wound around the drum-shaped high-frequency magnetic core 7 to obtain the required inductance, 9 is a pair of metal terminal plates arranged opposite each other on the same plane, and 10 is a metal A fixing part provided at the tip of the terminal plate 9 is used to securely fix the side surface of the flange part 5 of the drum-shaped high-frequency magnetic core 7 with adhesive or the like. The coils 8 are each electrically connected to a part of the metal terminal plate 9 (not shown), and the entire body is covered with a resin molded body 1. It is folded along the sides. Reference numeral 6 indicates a protruding part of the flange of the drum-shaped high-frequency magnetic core, and numeral 3 indicates a cutout part of the protruding part of the flange 6, which is obtained by cutting off the outer side surface of the resin molded body at the same time as the resin molded body in order to adjust the characteristics.

In the inductor of this embodiment configured as described above, the characteristics can be adjusted after completion by sequentially cutting out the flange protrusions 6 of the magnetic core without measuring the characteristics, so that desired characteristics can be achieved.

A second embodiment of the invention is shown in FIG. In the figure, a coil 8 is wound around the drum-shaped high-frequency magnetic core 7, the drum-shaped high-frequency magnetic core 7 is fixed at the fixing part lO of the metal terminal plate 9, the coil 8 is connected to the metal terminal plate 9, and the metal terminal Extracting the external drawer part 2 of the plate 9 to the outside of the resin molded body 1 is the same as in the first embodiment, but the capacitor l'l is inserted into the recessed part of the lower surface of the resin molded body 1, and the gold m terminal plate 9 Fold the bottom surface of the external drawer part 2
It is held and fixed at the lobes and connected to the electrodes 12 on both sides of the capacitor 11 to form a composite component.Similar to the first embodiment, the flange protrusion 6 of the drum-shaped high frequency magnetic core 7 is attached to the resin molded body 1 at the same time. By cutting out the side of the exterior, the characteristics and frequency of the composite part can be adjusted.

(Effects of the Invention) According to the present invention, a drum-shaped high-frequency magnetic core with a coil wound around a metal terminal plate is fixedly connected, a capacitor is connected as necessary, and the characteristics can be adjusted by attaching the capacitor to the flange of the drum-shaped high-frequency magnetic core. By cutting off the protrusion, the inductance or frequency can be changed, and a product with uniform characteristics and little variation can be obtained, which is excellent in mass production.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an inductor according to an embodiment of the present invention, FIG. 2 is a plan view of a drum-shaped high-frequency magnetic core used in the inductor, FIG. 3 is a sectional view of the inductor, and FIG. FIG. 3 is a cross-sectional view of an inductor according to a second embodiment. 1...Resin molded body, 2...External drawer part of metal terminal plate, 3... Cutout part for adjustment, 4.
... Winding core portion, 5 ... Flange portion, 6 ... Flange protrusion portion, 7 ... Drum-shaped high frequency magnetic core, 8 ... Coil, 9
...Metal @'j":' 10... Fixed part, 11.
...Capacitor, 12... Capacitor electrode. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A drum-shaped high-frequency magnetic core around which a coil is wound, a pair of metal terminal plates that hold and fix the flange side surfaces on both sides of the drum-shaped high-frequency magnetic core and connect the coils by wiring, and the drum-shaped high-frequency magnetic core. It consists of a resin molded body covering one end of the metal terminal plate, the other end of the metal terminal plate is pulled out to the outside of the resin molded body, and a part of the collar protrusion of the drum-shaped high frequency magnetic core is molded with resin. An inductor whose characteristics are adjusted by cutting out the exterior side of the body at the same time. (2) The inductor according to claim (1), wherein the resin molded body has a capacitor mounted inside or outside thereof and is connected to the metal terminal plate to form a composite.