Patent ID: 8570135
Filing Date: 2013-10-29
Classification: H01F

Abstract:
1. A transformer comprising: a winding part including a pipe shaped body part and flange parts extended from both ends of the body part in an outer diameter direction thereof; and a plurality of coils wound around an outer peripheral surface of the body part while being stacked thereon, wherein one of the flange parts disposed at one end of a winding part includes at least one lead groove therein, the lead groove being cut to be extended in the outer diameter direction, and the lead groove is divided into at least two outlets by a dividing protrusion disposed in an inner portion thereof, wherein the dividing protrusion has a trapezoidal cross section, when viewed along a plane tangential to the pipe shaped body part such that a width of the trapezoidal cross section of the dividing protrusion gradually increases in a direction toward an external surface of the flange part, wherein the trapezoidal cross section of the dividing protrusion has a sidewall having an inclined surface facing a sidewall of the lead groove, wherein the inclined surface forming the sidewall of the dividing protrusion has an angle of 45° or less with respect to the coils wound in the winding part.