A modular cabinet assembly has at least a first sub-cabinet and a second sub-cabinet. Each sub-cabinet includes a back board having at least two separate back board pieces that are pivotably connected to each other, a left side board pivotably connected to one of the at least two back board pieces, and a right side board pivotably connected to another of the at least two back board pieces. At least one shelf board having opposite ends is removably connected to the left side board and the right side board of either the first sub-cabinet or the second sub-cabinet. A first end board is connected to either an upper end of the first sub-cabinet or a lower end of the second sub-cabinet. A first connector removably connects the left side boards of the first and second sub-cabinets, and a second connector removably connects the right side boards of the first and second sub-cabinets.

A compact joining and leveling system for parts of furniture and furnishing items with a bottom and a shoulder includes, in combination, a front-foot unit and a rear-foot unit, wherein each front- and rear-foot unit includes a leveling group with a regulation mechanism in height that can be maneuvered with tools, wherein the leveling group of the front-and rear-foot units can be actuated from the front with respect to the piece of furniture through the space between the base and the floor, wherein the system also includes a connection group for stably interconnecting the bottom and the shoulder through a blocking element, and wherein the connection group can be actuated from the front with respect to the piece of furniture through the space between the bottom and the floor.

A compact joining and leveling system for parts of furniture and furnishing items with a bottom and a shoulder includes, in combination, a front-foot unit and a rear-foot unit, wherein each front- and rear-foot unit includes a leveling group with a regulation mechanism in height that can be maneuvered with tools, wherein the leveling group of the front-and rear-foot units can be actuated from the front with respect to the piece of furniture through the space between the base and the floor, wherein the system also includes a connection group for stably interconnecting the bottom and the shoulder through a blocking element, and wherein the connection group can be actuated from the front with respect to the piece of furniture through the space between the bottom and the floor.

A tray assembly includes a base body having a top surface, and a socket member extending downwardly from the top surface and defining a socket hole having a top opening that opens at the top surface.

A resilient member is disposed in the socket hole. A top cover is movably disposed in the socket hole above the resilient member. The top cover is movable upward and downward to switch between a first position and a second position. In the first position, the top cover covers the top opening and is limited from moving downward. In the second position, the top cover is movable downward from the first position, and the resilient member is pressed and stores energy for returning the top cover to the first position.

A tray assembly includes a base body having a top surface, and a socket member extending downwardly from the top surface and defining a socket hole having a top opening that opens at the top surface.

A resilient member is disposed in the socket hole. A top cover is movably disposed in the socket hole above the resilient member. The top cover is movable upward and downward to switch between a first position and a second position. In the first position, the top cover covers the top opening and is limited from moving downward. In the second position, the top cover is movable downward from the first position, and the resilient member is pressed and stores energy for returning the top cover to the first position.

For a flexible fastening, a fastening device for fastening a column to a support device comprises: a column plate which can be fastened to one end of the column and an accommodation device which can be fastened to the support device. The accommodation device has a longitudinal shape with a longitudinal direction and a predetermined length in the longitudinal direction and a cross-section, whereby an accommodation space configured to accommodate the column plate in a manner shiftable in the longitudinal direction and in an exactly fitting manner in the direction perpendicular to the longitudinal direction is formed. The fastening device comprises a fastening member configured to fasten the column plate to the accommodation device along the longitudinal direction, and, in the longitudinal direction, the column plate has a dimension which is smaller than the predetermined length in a state mounted in the fastening device.

For a flexible fastening, a fastening device for fastening a column to a support device comprises: a column plate which can be fastened to one end of the column and an accommodation device which can be fastened to the support device. The accommodation device has a longitudinal shape with a longitudinal direction and a predetermined length in the longitudinal direction and a cross-section, whereby an accommodation space configured to accommodate the column plate in a manner shiftable in the longitudinal direction and in an exactly fitting manner in the direction perpendicular to the longitudinal direction is formed. The fastening device comprises a fastening member configured to fasten the column plate to the accommodation device along the longitudinal direction, and, in the longitudinal direction, the column plate has a dimension which is smaller than the predetermined length in a state mounted in the fastening device.

A connector device comprises a male taper component having a base and a tapering bracket extending therefrom, and a female taper component having a tapering channel. The tapering bracket is releasably received within the tapering channel to effect a firm connection between the male taper component and the female taper component.

A connector device comprises a male taper component having a base and a tapering bracket extending therefrom, and a female taper component having a tapering channel. The tapering bracket is releasably received within the tapering channel to effect a firm connection between the male taper component and the female taper component.

A furniture kit is disclosed that includes a set each of floor ladders, longitudinal cross-bars, and longitudinal wind braces. Each of the floor ladders has two vertical supports connected via upper and lower rungs, each of the two vertical supports is equipped with a foot for placement on a floor. Each longitudinal end of the cross-bars is equipped with a latching claw mountable, without tools, on a floor ladder rung. Each of the wind braces is equipped at its longitudinal ends with a clamp designed to be mounted on a rung of a floor ladder by gripping the rung. Cross-bars and wind braces are designed such that a cross-bars can be mounted on upper rungs of first and second floor ladders, while one of the wind braces is mounted on the upper of the first of the floor ladders and the lower of the second of the floor ladders.