Patent ID: 8203415

Claim:
A bobbin structure comprising: a plurality of modular bobbin members, each connected with each other, and each modular bobbin member comprising: a perforation channel; a first baffle disposed on one end of said perforation channel and placed perpendicularly to said perforation channel, having a first connecting member positioned on a first outer wall of said first baffle; a second baffle disposed on the other end of said perforation channel and placed oppositely to said first baffle, having a second connecting member positioned on a second outer wall of said second baffle and configured to cooperate with said first connecting member; and a first winding slot disposed between said first baffle and said second baffle, accommodating a primary winding coil; and wherein said first connecting member of one said modular bobbin member is engaged with said second connecting member of another connected one, a second winding slot accommodating a secondary winding coil is positioned between two connected said modular bobbin members, and said first connecting member and said second connecting member sufficiently form an insulating bottom wall of said second winding slot for insulating said secondary winding coil from a magnetic core partially embedded in said perforation channel.