Patent ID: 8736411
Filing Date: 2014-05-27
Classification: H01F

Abstract:
1. A transformer disposed on a circuit board, comprising: a winding member comprising a bobbin, a primary coil and a secondary coil, wherein said primary coil and said secondary coil are wound on said bobbin; a magnetic core assembly comprising a first magnetic core and a second magnetic core, wherein said winding member is arranged between said first magnetic core and said second magnetic core; and an insulating seat comprising a receptacle, at least one ventilation hole, an entrance, at least one sheltering member and plural pins, wherein said winding member and said magnetic core assembly are accommodated within said receptacle, said sheltering member comprises a bottom plate parallel to said circuit board and perpendicular to an extension direction of said pins, said second magnetic core is attached on said bottom plate of said sheltering member, said ventilation hole is formed in said bottom plate of said sheltering member so that said second magnetic core is supported by said bottom plate and exposed to surroundings through said ventilation hole, said entrance is opposed to said ventilation hole so that said first magnetic core is exposed to surroundings through said entrance, and at least a first terminal of said primary coil and/or at least a second terminal of said secondary coil are connected with said pins.