Abstract: A printed circuit board assembly includes a printed circuit board (10), a retention module (20) mounted on the printed circuit board, and a back plate (30) attached to an underside of the printed circuit board opposite the retention module. The printed circuit board defines a plurality of through holes (16). The retention module defines a plurality of countersunk holes (25) therein, corresponding to the through holes of the printed circuit board. The back plate includes a base (32), and a plurality of latching posts (34) extending upwardly from the base. The latching posts extend through the through holes of the printed circuit board and engage in the countersunk holes of the retention module, thereby fixing the retention module to the printed circuit board. A plurality of fasteners (40) engages in the latching posts, thereby facilitating resilient engagement of the latching posts in the countersunk holes of the retention module.

Abstract: An electrical socket 1 includes a dielectric base 10, a number of conductive contacts 70 retained in the base, a cover 20 and an actuation member 30 for moving the cover with respect to the base. The base defines a receiving chamber 12 for receiving a cam shaft 32 of the actuation member. The cam shaft provides a cam member 33 having a driving side 330 and a plane side 332 opposite to the driving side. The driving side includes a start portion 3300 at one end thereof, an end portion 3302 at the other end thereof and a tip portion 3304 between the start portion and the end portion. The distance from the tip portion of the driving side to the plane side is a maximum distance, while the distance from either the start portion or the end portion to the plane side is smaller than the maximum distance.

Abstract: A printed circuit board assembly includes a printed circuit board (10), a retention module (20) mounted on the printed circuit board, and a back plate (30) attached to an underside of the printed circuit board opposite the retention module. The printed circuit board defines a plurality of through holes (16). The retention module defines a plurality of countersunk holes (25) therein, corresponding to the through holes of the printed circuit board. The back plate includes a base (32), and a plurality of latching posts (34) extending upwardly from the base. The latching posts extend through the through holes of the printed circuit board and engage in the countersunk holes of the retention module, thereby fixing the retention module to the printed circuit board. A plurality of fasteners (40) engages in the latching posts, thereby facilitating resilient engagement of the latching posts in the countersunk holes of the retention module.

Abstract: A ZIF socket includes a base (10), a cover (12) slidably mounted on the base, a plurality of terminals (19) received in the base, a lever (20) driving the cover to move along the base, and a fastening device (14; 16; 17). The fastening device has a securing portion (146; 166; 176) secured to the base, a neck portion (144; 164; 174) movably received in an elongated hole (125) of the cover, and an elongated head portion (143; 163; 173) abutting against a supporting surface (124) of the cover in which the elongated hole is defined, thereby fastening the cover and the base together in a vertical direction.