Image Number 2 for United States Patent #6538891.
A heat sink clip assembly for attaching a heat sink (30) to a CPU (40) mounted to a motherboard (50) includes a rigid shaft (10) and two wire clips (20). The shaft includes a pressing section (12) for pressing the heat sink, two engaging sections (14) at opposite ends of the pressing section, and two stop sections (16) at outmost ends of the engaging sections. A diameter of the engaging sections is less than diameters of the pressing section and the stop sections. Each wire clip has a coiled portion (22), and two spring arms (24) extending from opposite ends of the coiled portion. Each spring arm extends perpendicularly to a central axis of the coiled portion. A hook (26) is formed at a distal end of each spring arm, for engaging with a corresponding through hole (52) of the motherboard. The heat sink is thereby attached to the motherboard.