Closed type built-up receptacle assembly

Claim 1

A closed type built-up receptacle assembly comprised of at least one receptacle retained inside a hole on a wall by a mounting plate, and a face panel covering said mounting plate wherein: each of said at least one receptacle comprising: a hollow casing, said casing including internal side walls having two recessed retaining holes and two retaining grooves on two opposite of said side walls an internal back wall having a circular projection thereon, and two front horizontal walls having opposed horizontal grooves thereon; a receptacle body received inside said casing, said receptacle body having two elongated grooves vertically disposed on two opposite side wall thereof, a plug hole therethrough into which a plug may be inserted, and a circular projection on a back wall thereof; U-shaped holder fitted into the two elongated grooves on said receptacle body for holding said receptacle body within said casing, said U-shaped holder having two opposite side pins thereon, respectively inserted in the two retaining grooves on said casing; bias means retained between said casing and said receptacle body, said bias means being connected between the circular projection on said casing and the circular projection on said receptacle body; a covering on said casing over said receptacle body, said covering defining an opening through which a plug may be inserted into the plug hole on said receptacle body, two hooks respectively hooked in recessed retaining holes on said casing, two elongated, L-shaped plates on two opposite side walls thereof on the inside with two vertical sliding ways respectively defined therebetween, two elongated strips and two pins on said L-shaped plates; a first movable plate inserted to slide in the sliding ways on said covering and controlled to close or open the opening of said covering, said first movable plate comprising two projecting blocks spaced on an outside surface thereof, a key projected into the opening of said covering for lifting control, two opposite notches on two opposite top corners thereof, and a lug on an inside surface thereof; two torsional springs respectively mounted on the pins on the L-shaped plates of said covering for urging said first movable plate to close the opening on said covering, said torsional springs having each one end connected to the lug on said first movable plate and an opposite end stopped against an inside surface on said covering; a second movable plate movably inserted to slide in the sliding ways on said covering and bridged over the two elongated strips on the L-shaped plates of said covering, said second movable plate having two sliding grooves in which the two projecting blocks of said first movable plate may slide, and two projecting rods at two opposite top corners thereof; said mounting plate comprises two symmetrical rows of projecting strips respectively inserted into the two opposite horizontal grooves on each receptacle body, and a plurality of retaining holes; and said face panel including a plurality of hooks respectively hooked in the retaining holes on said mounting plate.