It is an object to decrease an occupied space in a printed board to carry out space saving and to reduce the size of a unit. without sacrificing the performance of a transformer and increasing a cost.

• 本发明的目的是提供一种变压器，该变压器不牺牲变压器的性能，不增加费用，而且在印刷电路板上占有的空间小，能实现节省空间和单元的小型化。