Patent ID: 7656260
Filing Date: 2010-02-02
Classification: H01F,Y10T

Abstract:
1. A wire wound electronic part comprising: a columnar core with flanges formed at upper and lower ends thereof respectively; a coil conductor wound around the core; and two terminal electrodes formed at a bottom of a flange, in which both ends of the coil conductor wound around the wire wound core are conductively connected to the terminal electrodes by solder, wherein the two terminal electrodes are contained in two grooves, respectively, formed at the bottom of the flange, wherein each groove is defined by a bottom surface, two side walls opposite to each other disposed on respective lateral sides of the bottom surface apart from the bottom surface, and two moderate slope surfaces connecting the bottom surface and the respective two side walls, said side walls being slanted relative to the bottom of the flange and, when assuming each side wall as a hypotenuse of a right triangle and defining the same with a length for the bottom and the height in the vertical direction (vertical height) of the right triangle, the vertical height of the side wall is formed larger than the length for the bottom and smaller than the diameter at the end of the coil conductor, said moderate slope surfaces being slanted relative to the bottom of the flange and, when assuming each moderate slope surface as a hypotenuse of a right triangle and defining the same with a length for the bottom and the height in the vertical direction (vertical height) of the right triangle, the length for the bottom of the moderate slope surface is formed larger than the vertical height of the moderate slope surface, wherein the edge portions of the terminal electrodes in the lateral direction are restricted by the respective side walls of the grooves, and the grooves are filled with the solder.