Transformer

A transformer includes: a bracket having a first end and a second end opposite to each other, the bracket including a main body portion having a first through-hole; the first pin is arranged at the first end of the bracket; the second pin is arranged at the second end of the bracket; a coil wound around the main body part; the magnetic core comprises an insertion section and an exposure section, the insertion section extends into the first through hole, and the exposure section is located outside the first through hole; the insulating part covers at least one part of the exposed section; wherein the surface between the first pin and the magnetic core or the insulating part is made of an insulating material, and the surface between the second pin and the magnetic core or the insulating partis made of an insulating material; and the bracket is made of an insulating material. Through the scheme provided by the utility model, the miniaturization design of the device can be realized whilea relatively large safety