JPH0548602B2 - - Google Patents

Description

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

(Constitution of Conventional Example 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 could not be changed and the product was 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 solid high-frequency magnetic core around which a coil is wound, and a pair of metal terminals that hold and fix the solid 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 combined 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 collar protrusion of the drum-shaped high-frequency magnetic core is simultaneously attached to the exterior side surface of the resin molded body. 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 portion provided at the tip of the terminal plate 9 is used to firmly fix the side surface of the collar portion 5 of the drum-shaped high-frequency magnetic core 7 with an adhesive or the like. The coil 8 is
Each is electrically connected to a part of the metal terminal plate 9 (not shown), and the whole is covered with a resin molded body 1,
The external drawer portion 2 of the metal terminal plate 9 is bent along the side surface of the resin molded body 1. 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 was removed from the exterior side surface 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 flange protrusions 6 of the magnetic core can be sequentially removed and adjusted while measuring the characteristics after completion, and desired characteristics can be achieved.

A second embodiment of the invention is shown in FIG. In the figure, a coil 8 is wound around a drum-shaped high-frequency magnetic core 7, the drum-shaped high-frequency magnetic core 7 is fixed with a fixing part 10 of a metal terminal plate 9, the coil 8 is connected to a metal terminal plate 9, and a coil 8 is wound around a drum-shaped high-frequency magnetic core 7. Pulling out the external drawer part 2 to the outside of the resin molded body 1 is the same as in the first embodiment, but the capacitor 11 is inserted into the recess on the lower surface of the resin molded body 1, and the external drawer part 2 of the metal terminal plate 9 is pulled out. It is held and fixed at the bent part of the lower surface and is connected to the electrodes 12 on both sides of the capacitor 11 to form a composite component.
Similar to the embodiment, the collar protrusion 6 of the drum-shaped high frequency magnetic core 7
At the same time as the resin molded body 1, the exterior side surface is cut off to adjust the characteristics and frequency of the composite part.

(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 attached and connected as necessary, and the characteristics can be adjusted using the flange protrusion of the drum-shaped high-frequency magnetic core. By removing the inductance or frequency, it is possible to obtain a product with uniform characteristics with little variation and excellent mass-producibility.

[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. DESCRIPTION OF SYMBOLS 1... Resin molded body, 2... External drawer part of metal terminal plate, 3... Cutting part for adjustment, 4... Winding core part, 5... Flange part, 6... Flange protrusion part, 7... ...Drum-shaped high-frequency magnetic core, 8...Coil, 9...Metal terminal plate, 1
0... fixed part, 11... capacitor, 12... capacitor electrode.

Claims (1)

[Scope of 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 sides of the flanges on both sides of the drum-shaped high-frequency magnetic core, and to which the coils are connected by wiring; It consists of a resin molded body covering one end of a metal terminal plate and a molded high frequency magnetic core, and the other end of the metal terminal plate is pulled out to the outside of the resin molded body, and a part of the protruding part of the collar of the drum shaped high frequency magnetic core is pulled out. An inductor characterized in that its characteristics are adjusted by cutting off a portion of a resin molded body at the same time as an exterior side surface of the resin molded body. 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.