Heat dissipation device having a fan holder thereon

A heat dissipation device comprising:

• a heat sink comprising an engaging portion in an outer periphery thereof;
• a fan mounted on a top of the heat sink;
• and
• a ring-shaped fan holder securing the fan to the heat sink, having a ring-shaped main body with first and second free ends spaced from and facing each other, a first clip having an axle pivotally connected to the first free end, an operating portion opposite the axle adapted for receiving a force to rotate the first clip in respect to the axle and at least a pivot between the axle and the operating portion, a second clip having an end connecting with the at least a pivot and an engaging rod opposite the end for engaging with the second free end of the fan holder;
• wherein the main body of the fan holder has a first fixing portion engaging with the fan and a second fixing portion engaging with the engaging portion of the heat sink;
• and
• wherein when the engaging rod engages with the second free end and the first clip is rotated in respect to the axle to reach a position wherein the operating portion is remote from the second free end, the engaging rod has a tight engagement with the second free end, whereby the heat sink and the fan are securely connected together by the fan holder.