Transformer structure

1. A transformer structure, comprising:

a bobbin comprising a main body and a channel, wherein said main body has a first winding section and plural first pins, said plural first pins are located at bilateral sides of said main body, and said channel runs through said main body;

a conductive base disposed on a bottom side of said bobbin, and comprising at least one connecting part, wherein through said connecting part of said conductive base, at least a portion of said plural first pins are electrically connected with each other;

a first winding coil wound around said first winding section;

plural second winding coils connected with corresponding first pins;

a magnetic core assembly partially embedded into said channel of said bobbin; and

said connecting part of said conductive base comprises plural third pins and at least one trace, wherein said trace is buried within said conductive base and connected with two of said plural third pins, wherein said two of said plural third pins are extended from bilateral sides of said conductive base and electrically connected with two of said plural first pins at said bilateral sides of said main body of said bobbin, so that said two of said plural first pins at said bilateral sides of said main body of said bobbin are electrically connected with each other through said trace.

2. The transformer structure according to claim 1 , wherein said transformer structure is mounted on said circuit board, wherein said circuit board has a through-hole for partially accommodating said transformer structure, and said plural first pins are inserted into said circuit board.

3. The transformer structure according to claim 1 , further comprising a covering member, which is combined with said bobbin, wherein said covering member comprises:

a bottom plate comprises a slab and a bottom surface, wherein said slab is extended downwardly from an edge of said bottom surface;

a receiving space defined by said slab and said bottom surface of said bottom plate for partially accommodating said bobbin;

a receptacle plate extended upwardly from said bottom plate, wherein said receptacle plate has a first receptacle for partially accommodating said main body of said bobbin and said magnetic core assembly, and said receptacle plate has an opening aligned with said first winding section of said bobbin;

a stopper located at bilateral sides of said opening and parallel with said bottom plate;

an extension wall vertically extended from said stopper and connected with the bottom plate, wherein at least one second receptacle is defined by said stopper, said extension wall and said bottom plate for partially accommodating said magnetic core assembly; and

plural second pins extended externally from a side of said extension wall, wherein two outlet terminals of said first winding coil are wound around and connected with corresponding said second pins.

4. The transformer structure according to claim 3 , wherein said bobbin further comprises two lateral plates and two connecting seats, wherein said two lateral plates are located at bilateral sides of said main body, said two connecting seats are extended externally from said two lateral plates, and said plural first pins are extended from said connecting seats.

5. The transformer structure according to claim 4 , further comprising a positioning member, wherein said positioning member comprises a first positioning part and a second positioning part, wherein said first positioning part is disposed on one of said two connecting seats of said bobbin, and said second positioning part is disposed on an inner surface of said covering member corresponding to said first positioning part, wherein after said first positioning part and said second positioning part are engaged with each other, said bobbin and said covering member are combined together.

6. The transformer structure according to claim 3 , wherein said main body of said bobbin further comprises plural second winding sections, wherein said plural second winding coils are wound around corresponding said second winding sections.

7. The transformer structure according to claim 6 , wherein said bobbin further comprises plural partition plates, two lateral plates, and two connecting seats, wherein said plural partition plates are disposed on said main body, said two lateral plates are located at bilateral sides of said main body, said two connecting seats are extended externally from said two lateral plates, and said plural first pins are extended from said connecting seats, wherein said first winding section and said plural second winding sections are defined by said plural partition plates and said lateral plates.

8. The transformer structure according to claim 7 , further comprising a positioning member, wherein said positioning member comprises a first positioning part and a second positioning part, wherein said first positioning part is disposed on one of said two connecting seats of said bobbin, and said second positioning part is disposed on an inner surface of said covering member corresponding to said first positioning part, wherein after said first positioning part and said second positioning part are engaged with each other, said bobbin and said covering member are combined together.

9. The transformer structure according to claim 1 , wherein said conductive base further comprises a first surface and a second surface, wherein said first surface and said second surface are opposed to each other, and said first surface of said conductive base is attached on said bottom side of said bobbin.