Patent ID: 8643459

Claim:
A transformer, comprising: a bobbin part including a lower bobbin and an upper bobbin laminated above the lower bobbin without surrounding the lower bobbin and combined with the lower bobbin, each bobbin including a tube-shaped body part having a penetration hole therein, flange parts protruded outwardly from both sides of the body part, and a terminal coupling part protruded from one side of the flange part of each of the bobbins, and each terminal coupling part having external connection terminals coupled thereto; a core inserted into the penetration holes in the lower bobbin and the upper bobbin to form a magnetic circuit; a coil part including a coil wound around the lower bobbin and a coil wound around the upper bobbin; and a bobbin fixing member combined with the bobbin part in which the lower bobbin and the upper bobbin are laminated to fix and combine the lower bobbin and the upper bobbin, the terminal coupling part of the upper bobbin including a separating block protruded between the coil wound around the lower bobbin and the external connection terminals of the upper bobbin to secure an insulation distance therebetween, and the terminal coupling part of the lower bobbin including a separating block protruded between the coil wound around the upper bobbin and the external connection terminals of the lower bobbin to secure an insulation distance therebetween.