Connecting element for heat dissipation unit and heat dissipation unit using same

Abstract

A heat dissipation unit is connected to a bare die heat source by extending connecting elements through four predetermined corners on the heat dissipation unit. The connecting elements respectively include a screw having a spring fitted therearound; a sleeve defining a receiving space for receiving the screw and the spring therein, and having a window formed near an upper end thereof to radially communicate with the receiving space; and a turnable retaining ring fitted around the upper end of the sleeve and including a tongue curled toward a center of the turnable retaining ring and being extendable through the window into the receiving space to compress the spring. When all the turnable retaining rings are turned, the tongues can be moved away from the springs, allowing the springs to release their elastic force synchronously and push the heat dissipation unit toward the bare die heat source evenly for heat exchange.