Patent ID: 8183968

Claim:
A bobbin of a transformer, said bobbin comprising: a main body having two side plates, which are respectively disposed on two opposite sides of said main body, wherein a winding section is defined within said two side plates for winding a winding coil; plural connecting bases disposed on said two opposite sides of said main body, and connected with said side plates, wherein plural wire-arranging grooves are formed in a bottom surface of each connecting base, and at least one of said side plates has an inner recess in communication with a corresponding wire-arranging groove; at least one conducting pin partially buried in a corresponding connecting base, wherein said conducting pin includes a connecting part and an insertion part vertical to said connecting part, and said insertion part is vertically extended from said connecting base; and at least one auxiliary pin disposed on said connecting base, and adjacent to and in parallel with said connecting part of said conducting pin, wherein an outlet terminal of said winding coil is firstly wound on said auxiliary pin and then wound on said connecting part of said conducting pin, and an initial winding segment of said winding coil is accommodated within said wire-arranging groove and said inner recess, thereby preventing said winding coil from rubbing against said initial winding segment during said winding coil is wound on said winding section.