Patent ID: 7564335

Claim:
A transformer mounting on a longitudinal surface of a printed circuit board, wherein the transformer comprises a core formed from portions of ferrite core material and having two parallel front and rear sides and two parallel lateral sides, coils passing around the core; a dielectric bobbin having a cylindrical body for holding the coils within the premise of the core, two lateral side legs formed integral to the cylindrical body to extend substantially along the lateral sides of the core respectively for supporting the transformer on the printed circuit board, and electrical terminals mounted on the legs for holding ends of the coils and electrically leading the coil ends to the circuit board and including a row of vertical primary pin leads for penetrating the circuit board at thru holes formed therein to secure the transformer and a row of longitudinal primary terminal pins extending from the primary pin leads in one of the side legs and a row of vertical secondary pin leads for penetrating the circuit board and a row of longitudinal secondary terminal pins extending from the secondary pin leads in the remaining side leg, an improvement comprising: a. longitudinally outwardly extending hooks formed of bent sections in one of the rows of the primary and secondary pin leads; b. a positive locking joint through an oblique sidewise drop of the transformer terminals into the thru hole of the circuit board; c. a solder joint between the transformer and circuit board.