Heat dissipation device having fastener assemblies for attachment thereof to a heat-generating component

A heat dissipation device, comprising:

• a heat sink comprising a base plate and a fin set fixed on the base plate, the base plate defining a plurality of mounting holes therein;
• and
• a plurality of pre-assembled fastener assemblies respectively installed in the mounting holes of the heat dissipating device, each fastener assembly comprising:
• a sleeve comprising a hollow body, a bottom plate at a bottom thereof and an engaging cylinder which extends downwardly from the bottom plate and is received in a corresponding mounting hole of the base plate, the bottom of the bottom plate of the sleeve rested on a bottom surface of the base plate around the corresponding mounting hole, the engaging cylinder defining therein a through hole communicating with the hollow body and having at least one latching protrusion which projects radially and outwardly from the engaging cylinder and is locked with a bottom of the base plate;
• a bolt comprising a shaft, a head at an end of the shaft and a threaded part formed at an opposite end thereof adapted for threadedly engaging with a retainer of a printed circuit board, the head being received in the sleeve above the bottom plate, the shaft being received in the through hole of the sleeve whilst the threaded part is held beneath the engaging cylinder of the sleeve;
• and
• a resilient component held between the head of the bolt and the bottom plate of the sleeve.

A heat dissipation device, comprising:

• a heat sink comprising a base plate and a fin set fixed on the base plate, the base plate defining a plurality of mounting holes therein;
• and
• a plurality of pre-assembled fastener assemblies respectively installed in the mounting holes of the base plate, each fastener assembly comprising:
• a sleeve comprising a hollow body, a bottom plate at a bottom thereof and an engaging cylinder which extends downwardly from the bottom plate and is received in a corresponding mounting hole of the base plate, the engaging cylinder defining therein a through hole communicating with the hollow body and having at least one latching protrusion which projects radially and outwardly from the engaging cylinder and is locked with a bottom of the base plate, the at least one latching protrusion having a flat annular surface in a top thereof which abuts against a bottom surface of the base plate around the corresponding mounting hole and a tapered lower portion having an outer diameter decreasing gradually in a direction from the top toward a bottom of the engaging cylinder;
• a bolt comprising a shaft, a head at an end of the shaft and a threaded part formed at an opposite end thereof adapted for threadedly engaging with a retainer of a printed circuit board, the head being received in the sleeve above the bottom plate, the shaft being received in the through hole of the sleeve whilst the threaded part is held beneath the engaging cylinder of the sleeve;
• and
• a resilient component held between the head of the bolt and the bottom plate of the sleeve.