US 6,587,023 B2 · Electromagnetic induction device

Abstract

An electromagnetic induction device having a flat configuration that requires a relatively small space for installation on a circuit substrate includes a flat bobbin (1T) having a length (D1) smaller than a radial size (D2) thereof has primary and secondary windings (11, 12) wound thereon. This bobbin (1T) has coaxially aligned throughholes (20, 22) defined therein into which core legs (24T and 24T) of generally T-shaped first and second core pieces (23T, 23T) are inserted from opposite directions, respectively. Respective core arms (25T, 25T) of the first and second core pieces (23T, 23T) extend parallel to each other.

Claims12

Dependent claims

An electromagnetic induction device which comprises:

a core assembly for defining a magnetic circuit, said core assembly including T-shape or L-shape first and second core pieces;
a substantially flat bobbin having an axial width and a radial size, the axial width being smaller than the radial size, said bobbin having a bore defined therein so as to extend in an axial direction of the bobbin;
and
a winding member mounted on the bobbin;
wherein core legs of the first and second core pieces are inserted into the bore of the substantially flat bobbin while core arms of the first and second core pieces extend parallel to each other.

2 more elements

Dependencies are inferred from the claim text.

Electromagnetic induction device

Life of this patent

Electromagnetic induction device

Life of this patent

Abstract

Claims12