Patent ID: 7791442

Claim:
An electronic transformer used in low-voltage lamps mainly includes an outer case, an electronic controlling circuit and a voltage switch isolating transformer, in which the outer case consists of an upper cover plate ( 1 ) and a lower cover plate ( 2 ), the electronic controlling circuit and a magnetic core coil ( 6 ) of the voltage switch isolating transformer are put between the upper cover plate ( 1 ) and the lower cover plate ( 2 ), characterized in that: an outside surface of the lower cover plate ( 2 ) provides concaving grooves ( 9 ) adapting to coil winding, corresponding line passage holes ( 10 ) and a center hole ( 12 ) of the lower cover plate; windings of the voltage switch isolating transformer are embedded in the grooves ( 9 ) through the center hole ( 12 ) of the lower cover plate, the line passage holes ( 10 ) and a center hole of the magnetic core coil ( 6 ); and the upper cover ( 1 ) plate and the lower cover plate ( 2 ) are embedded with each other.