Suspension device

#1. Field of the Invention

#The present invention relates to a suspension device for an optical media storage device, and in particular to a suspension device reducing vibration caused by the optical media storage device.

#2. Description of the Related Art

#The present invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:

#FIG. 1 is a schematic view showing a conventional suspension device of an optical disk drive;

#FIG. 2 is a schematic view showing another conventional suspension device of an optical disk drive;

#Referring to FIG. 3 and FIG. 4, the suspension device 100 for an optical media storage device comprises a loader 110, a traverse 120 and a dynamic mass 130. The traverse 120 is disposed on the loader 110 and four isolators 122 are disposed between the traverse 120 and the loader 110. The dynamic mass 130 is disposed on the traverse 120 and four dampers 132 are disposed between the dynamic mass 130 and the traverse 120. Additionally, a spindle motor 124, two parallel sliding tracks 126, an optical pick-up 128 and a DC servo motor 129 are disposed on the traverse 120.

#Referring to FIG. 4, FIG. 5 and FIG. 6, the traverse 120 has a first weighted end 121. The weight of the traverse 120 is not uniformly distributed over the traverse 120. The first weighted end 121 dominates major weight while the other end of the traverse 120 dominates minor weight. Thus, the mass center of the traverse 120 is close to the first weighted end 121. Meanwhile, the spindle motor 124 is disposed on the first weighted end 121. Similarly, the dynamic mass 130 has a second weighted end 131. The weight of the dynamic mass 130 is not uniformly distributed over the dynamic mass 130. The second weighted end 131 dominates major weight while the other end of the dynamic mass 130 dominates minor weight. Thus, the mass center of the dynamic mass 130 is close to the second weighted end 131. Specifically, the second weighted end 131 is located above the first weighted end 121.

#In order to demonstrate that the present suspension device 100 can effectively reduce vibration caused by the optical media storage device, vibration values generated by the spindle motor are measured and illustrated in FIG. 7. As shown in FIG. 7, X axis denotes rotation of the spindle motor (rpm), curve A represents that the mass center of the dynamic mass is far from the weighted end, curve B represents that the mass center of the dynamic mass is on the middle of the dynamic mass, curve C represents that the mass center of the dynamic mass is on the weighted end, and Y axis denotes front and rear vibration accelerations (G) of the suspension device.