Abstract: A heat sink retainer has a rectangle frame with four corners each having a slit defined through the corner. A pair of U shape clamping strips each has two legs. Each leg extends through a corresponding one of the slits. A controlling device pivotally connects to each of the clamping strips and has two driving bosses and each driving boss is integrally formed on a distal end of the controlling device and is clamped between the frame and the clamping strip to control movement of the distal ends of the clamping strip to engage/disengage with holes in the heat sink.

Abstract: A fixing latch member for heat radiating board of CPU, including two latch boards, two linking levers and a controlling lever. Two ends of each latch board are respectively formed with a first and a second latch sections. The linking lever is passed through the latch board. A first end of the linking lever is hooked with the first latch section of the latch board. A second end thereof is formed with a connecting plate section having a locating hole and passed through the second latch section. Each end of the controlling lever is formed with an outward extending driving section fitted in the locating hole of the linking lever. The second latch section of the latch board resiliently abuts against the bottom of the driving section. By means of rotating the controlling lever, the driving sections thereof are rotated within the locating holes of the linking levers.