Electric jack with a pivoted cover

An electric jack comprising:

• a base, said base comprising two parallel side walls, a raised block on the middle between said side walls, said raised block having a beveled front stop edge two longitudinal grooves at two opposite sides of said raised block between said side walls, two pivot pins aligned at two opposite sides of said raised block, two tongues respectively inwardly raised from said side walls, parallel insertion slots at said raised block, a plurality of metal terminals respectively mounted in said insertion slots, a stop block transversely disposed at a rear end thereof between said longitudinal grooves, said stop block having a front slope;
• and
• a cover pivoted to said raised block, said cover comprising two pivot holes bilaterally disposed at a front end thereof and respectively coupled to the pivot pins at said raised block of said base, two parallel rails longitudinally disposed at a bottom side wall thereof corresponding to the longitudinal grooves in said base for guiding a module plug into contact with the metal terminals in said base, said rails each having a beveled front edge, two retaining blocks raised from the bottom side wall at one end between said rails for engagement with two stop edges at the clip of the inserted module plug, and two locating grooves respectively provided at said rails on the outside for engagement with the tongues at the side walls of said base to hold said cover in position when said cover is closed on said base.