FLY BACK TRANSFORMER FOR REDUCING THE COST OF PRODUCTION BY REDUCING THE NUMBER OF PROCESSES REQUIRED FOR WINDING FILM

摘要

PURPOSE: An FBT(Fly Back Transformer) is provide to reduce the cost of production and the amount of work to be done by eliminating a work for winding the first insulation film before winding the first coil around a high-pressure bobbin. CONSTITUTION: A low-pressure bobbin on which a low-pressure coil is wound is disposed within a center hole of a bobbin body(1a). A plurality of input and output terminal pins(23a,24a) are installed at upper and lower parts of the bobbin body(1a). A high-pressure coil is wound between insulation film layers which are wound on the outside of the bobbin body(1a). The first high-pressure coil is caught at an input catch protrusion(11) before it is wound around the bobbin body. The first high-pressure coil is caught at an output catch protrusion(12) before it is drawn out to the outside. The input catch protrusion and the output catch protrusion are integratedly formed.