Patent ID: 7118505

Claim:
An integrally formed gear set with a plurality of gears comprising a first gear, a second gear and a third gear; each of the first gear, second gear and third gear being formed with a plurality of teeth and a plurality of recess portions; a diameter of the second gear being smaller than that of the first gear and the diameter of the third gear being smaller than that of the second gear; the teeth and recess portions being alternatively arranged; each gear surface of the second gear and third gear being vertically extended with protruding rings; an outer side of each protruding ring having a plurality of protruding sheets which are vertical to a plurality of one of surfaces of the first gear and the second gear; a concave portion is formed between two adjacent protruding sheets; each protruding sheet being vertically extended from a respective recess portion; the concave portion being between two adjacent recess portions; the third gear having an assembling hole at a center thereof for assembling with a rod; and wherein the first, second and third gears are formed integrally.