Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1993-01-19
1995-03-28
Ledynh, Bot
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
174 521, 361730, 361811, 336 65, 336 67, 336192, H05K 702, H05K 500, H01F 1502
Patent
active
054023211
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a composite component including an inductor, a composite device including at least one composite component combined with a housing, and a method of producing the composite device.
BACKGROUND ART
In producing an enductance-capacitance (LC) type composite component made up of a combination of an inductor and a capacitor for example, or a composite device including the composite component, a method generally used hitherto is to mount a discrete inductor and a discrete capacitor on a circuit board so as to provide a composite component or device and cover the whole body with an insulating coating, or otherwise, to form a capacitor by patterning electrodes on a dielectric board and mount a discrete inductor on this dielectric board so as to provide a composite component or device and then cover the whole body with an insulating coating, as described in Japanese Patent Laid-open Publication No.58(1983)-15223.
As mentioned above, since the conventional LC type composite device is of such a structure in which a discrete capacitor and a discrete inductor are mounted on a circuit board or a discrete inductor is mounted on a dielectric board having a capacitor patterned therein, the size of the device will become large in the plane direction and mounting work will become difficult.
Also, in a conventional composite device of this kind, when a plurality of inductors are mounted, the installed position or direction of the individual inductors is liable to change, so that the electrical characteristics of the device may vary. Particularly when the inductors are installed at small intervals to respond to the requirement of down-sizing of the device, a little positional change of the inductors sometimes causes a change in the electrical characteristics to an intolerable range.
Furthermore, since the conventional composite device of this kind is of such a structure that the whole body is covered with an insulating coating, it is difficult to secure a high dimensional accuracy for the external shape. If a composite component includes an inductor, depending on the way in which tile insulating coating is applied or filled, a core of the inductor may change in the electrical characteristics affected by the contraction stress of the insulating coating.
Therefore, it is an object of the present invention to provide a composite component and a composite device which have solved the above-mentioned conventional problems, which is reduced in size and suitable for mass-production, and stable in the electrical characteristics.
Another object of the present invention is to provide a method of producing with high mass-production efficiency a composite device having stable electrical characteristics, a small size, and an external configuration with high dimensional accuracy.
DISCLOSURE OF INVENTION
In order to achieve the above object, the present invention provides a composite component including an inductor, at least one circuit component different from the inductor, and coupling unit for connecting the inductor with the circuit component. The inductor has a coil support and a coil. The coil support has two opposite end portions, and a coil winding portion at the middle body thereof between the two opposite end portions. The coil is wound on the coil winding portion. The circuit component is a chip component having electrodes at both opposite end portions of the coil support. The coupling unit includes at least one pair of metal pieces. A pair of metal pieces are arranged such that one ends of the metal pieces are fixed to one of the two end portions of the coil support, and the other ends of the metal pieces face each other across a space. The circuit component is disposed between the metal pieces, and the electrodes are attached fixedly to the metal pieces.
As mentioned above, a pair of metal pieces forming the coupling unit for connecting the inductor and the circuit component such as a capacitor have one ends fixed to the end portion of the coil support and have the other end
REFERENCES:
patent: 4755784 (1988-07-01), Taoka et al.
patent: 5003279 (1991-03-01), Morinaga et al.
patent: 5015981 (1991-05-01), Lint et al.
Doi Shigeyuki
Izu Toshio
Osada Hisashi
Sato Kazuo
Ledynh Bot
TDK Corporation
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