Patent ID: 7886425

Claim:
A method of manufacturing a transformer, comprising steps of: providing a first bobbin piece having a first channel therein and a primary winding section; providing 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 and having a first pin arranged on a bottom surface of said secondary base, wherein a plurality of secondary winding sections are defined by every two adjacent partition plates, and a second channel is defined within said wall portion; inserting a second pin into said second bobbin piece to penetrate through said wall portion and said second secondary side plate and form a wire-arranging part protruded from said second secondary side plate and an insertion part protruded from said bottom surface of said secondary base; winding a primary winding coil on said primary winding section; fixing a first terminal of a secondary winding coil on said first pin, winding said secondary winding coil on said secondary winding sections and fixing a second terminal of said secondary winding coil on said wire-arranging part of said second pin; and partially disposing a magnetic core assembly within said first channel of said first bobbin piece and said second channel of said second bobbin piece.