A hinge assembly, which permits convenient assembly and disassembly by simple push operations, includes a first part to be secured to a body member and carrying a hinge pin, and a second part to be secured to a pivotal member and carrying a socket for pivotally receiving the hinge pin of the first part. The hinge pin is retractably mounted to the first part so as to be movable to an extended, operative position receivable within the socket of the second part for pivotally mounting the pivotal member to the base member, and to a retracted, released position spaced from the socket of the second part for permitting removal of the pivotal member from the body member. Also described is a cabinet with at least one such hinge assembly on each of the two opposite edges of the main cabinet section and cover section, respectively. One hinge assembly serves as a pivotal mounting of the cover section to the main cabinet section permitting the cover section to be pivoted to its open and closed positions with respect to the main cabinet section; and the other hinge assembly serves as a releasable latch for latching the cover section in its closed position with respect to the main cabinet section.