Patent ID: 7116204

Claim:
A leakage transformer, comprising: a primary winding constituted by winding a conducting wire; a secondary winding arranged to be stacked in a height direction of said primary winding and constituted by winding a conducting wire that is different from the conducting wire of said primary winding; a first terminal block comprising a plurality of primary side terminals to which one end and the other end of said primary winding are respectively bound and a first wrapping terminal to which one end of said secondary winding is bound; a second terminal block comprising a second wrapping terminal to which the other end of said secondary winding is bound; a plurality of two-step coil bobbins each having a first winding frame portion to which said primary winding is wound and a second winding frame portion to which said secondary winding is wound; an adjustment coil bobbin arranged between said plurality of two-step coil bobbins and to which an adjustment portion for adjusting a magnetic coupling of said primary winding is wound; and a core having pillar portions holding said two-step coil bobbins and said adjustment coil bobbin respectively, side walls surrounding outside of the pillar portions, and a recessed portion surrounded by the side walls into which said two-step coil bobbins and said adjustment coil bobbin are fitted, wherein said two-step coil bobbins integrates said first terminal block and said second terminal block.