Patent ID: 7515026

Claim:
A transformer comprising: a first bobbin piece having a first channel therein, wherein a primary winding coil is wound on said first bobbin piece; a second bobbin piece comprising a first secondary side plate, a second secondary side plate opposed to said first secondary side plate, a plurality of partition plates between said first secondary side plate and said second secondary side plate, a wall portion between every two adjacent partition plates, and a secondary base extended from an edge of said first secondary side plate, wherein a secondary winding section is defined by every two adjacent partition plates for winding a secondary winding coil thereon, and a second channel is defined within said wall portion; a first pin arranged on a bottom surface of said secondary base; a second pin including a wire-arranging part, an insertion part and an intermediate part between said wire-arranging part and said insertion part, wherein said wire-arranging part is protruded from said second secondary side plate, said intermediate part is buried in said wall portion, said insertion part is protruded from said bottom surface of said secondary base, wherein a first terminal of said secondary winding coil is fixed on said first pin and a second terminal of said secondary winding coil is fixed on said wire-arranging part of said second pin; and a magnetic core assembly partially embedded within said first channel of said first bobbin piece and said second channel of said second bobbin piece.