Square sleeve in combination with a drum core for electrical appliance

#1. Field of the Invention

#The present invention relates to a combination of a square sleeve and a drum core, and more particularly to a combination of a square sleeve and a drum core for electrical appliance. The drum core is mounted in the receiving area in the square sleeve so as to eliminate the unnecessary process to reduce cost and enhance the inductance of the combination.

#2. Description of Related Art

#FIG. 1 is a perspective view of the combination of a square sleeve and a drum core of the present invention;

#FIG. 2 is an exploded perspective view of the combination of the present invention;

#FIG. 3 is an exploded perspective view showing that coil is wound around the drum core of the present invention;

#With reference to FIG. 1 and FIG. 2, the combination of a square sleeve and a drum core includes:

#a square sleeve 2 which is made of a magnetic material and has a receiving area 21 defined therein, wherein in this embodiment, the receiving area 21 is a through hole;

#at least two contacting portions 22 which are formed on a bottom face 23 of the square sleeve 2 and on opposite sides of the receiving area 21, wherein the at least two contacting portions 22 are formed on the bottom face 23 of the square sleeve 2 by metalized process, each of the at least two contacting portions 22 has a guiding recess 221 extending toward the receiving area 21 from a corner of the square sleeve 2; and