ZIF socket with improved cam mechanism

摘要

A ZIF socket (1) includes a base (2), a cover (3) movably mounted on the base, a plurality of contacts received in the base, and a cam mechanism (4) engaged with the cover and the base. The cam mechanism comprises a cam device (41) and a base ring (42) assembled on the cam device. The cam device is composed of five column-shaped portions, the diameters of which are successively decreasing from the uppermost one to the lowermost one. A topside of the base ring abuts directly against a supporting surface (417) formed on the cam device to reduce the frictional force required to overcome during rotating the cam mechanism.