Patent ID: 8339224

Claim:
A vibration device comprising: upper and lower cases combined with each other to form a case, the upper case including an upper surface and a side surface extending from the upper surface to the lower case; a magnetic force generating unit provided on the lower case; a vibrating unit including a magnet facing the magnetic force generating unit, and a weight; and at least one elastic unit supporting the vibrating unit elastically, the at least one elastic unit having a first portion directly contacting the upper case, a second portion contacting the vibrating unit, and a third portion between the first portion and the second portion, wherein the third portion has a slant, wherein the first portion and the weight have an overlapping area in a vertical plane, and wherein the first portion is arranged on a first circumference and the second portion is arranged on a second circumference, and wherein a diameter of the first circumference is larger than a diameter of the second circumference.