Patent ID: 8564395

Claim:
A transformer, comprising: a base comprising: a main core part being a polygon in shape, and having a plurality of sides, a plurality of corners each formed at a connection of two adjacent sides among the plurality of sides, and a penetrating hole at a center part of the polygon, a plurality of side wing parts being one-to-one correspondent with and spaced from the sides of the main core part, and a plurality of opening slots being one-to-one correspondent with the corners of the polygon, each of the opening slots being formed between two adjacent side wing parts among the plurality of side wing parts; a plurality of plate bodies each having an annular part having a polygonal open hole for slipping on the main core part, the annular part having first and second ends spaced from each other, first and second connection parts connected to the first and second ends of the annular part, respectively, wherein the first and second connection parts are spaced from each other by a guided slot extending diagonally from a corner of the polygonal open hole, and a pair of pole leads on opposite sides of the guided slot and connected to the first and second connection parts, respectively; and a plurality of isolating bodies each being annular in shape and having a through hole for slipping on the main core part; wherein the plate bodies and the isolating bodies are alternately stacked up on the main core part which is received in the open holes of the plate bodies and the through holes of the isolating bodies, each of the opening slots is correspondent with at least one guided slot of the plate bodies, the first and second connection parts of each of the plate bodies extend side-by-side, while being spaced from each other by the respective guided slot, through the corresponding opening slot, and the pole leads of the plate bodies project further outwardly from the corresponding connection parts and beyond the opening slots corresponding to at least two corners among the corners of the polygon.