Tdk Corporation

Toshio Izu

Kazuo Sato

Hisashi Osada

Shigeyuki Doi

Koichi Yasuda

Satoru Kitahara

Composite device having inductor and coupling member

A case has parts storage openings through a top plane. Terminals protrude above the plane and extend downward through the case to a bottom plane, where they are bent to conform to the bottom plane. Interconnections of the terminals in the bottom plane provide the wiring pattern necessary for the creation of an LC filter. LC combination parts are made using a coil wound on a coil support with a capacitor secured to the top surface of the coil support. The coil part of the LC combination parts are inserted into the parts storage openings of the case, to secure the coils rigidly in place. The coils and capacitors are affixed to the terminals above the top plane. The resulting rigid support of the LC combination units provides stable and accurate filter characteristic in a compact package. The interconnections of the terminals in the bottom plane permits observation of the connections to permit manual inspection or the use of pattern recognition hardware and software for robotic sorting and assembly.

Integrated LC filter

In a split bobbin designed to be rotatably mountable on a core and attached to a bobbin holding base after specific winding of coils, the split bobbin has collars at least at its both ends and cutout sections at least at two places in the outer periphery of these collars. In these cutout sections are provided lead terminal holding holes of specific depth in which rod-like lead terminals can be inserted. Furthermore, the present invention provides a coil device which includes a split bobbin having coil winding areas, winding end fastening members provided on an outer periphery, and collars provided with through holes connected to the winding end fastening members; a core produced of a magnetic material with the bobbin mounted in a split state; a winding wound on the bobbin in the winding areas, with its end wound on the winding end fastening members; and a bobbin holding base which supports the bobbin and the coil in a fitted state, and has lead terminals routed in the through holes of the collars to the winding end fastening members. In this winding end fastening members, the end of the coil is connected with the lead terminals.

Split bobbin and coil device

Growing community of inventors

Tokyo, Japan

Toshio Izu