A sofa can be knock-downed without a tool. The sofa includes left and right armrests, a front frame, a seating and a back. The sofa is provided with stowage compartments, each of which is joined by means of a bolt hole plate located on the frame construction with a bolt connecting medium, and serving as sofa stabilizers are four sofa legs which are placed on at the bottom of the left and right arm frame construction of the sofa.

A sofa can be knock-downed without a tool. The sofa includes left and right armrests, a front frame, a seating and a back. The sofa is provided with stowage compartments, each of which is joined by a bolt hole plate located on the frame construction with a bolt connecting medium, and serving as sofa stabilizers are four sofa legs which are placed on at the bottom of the left and right arm frame construction of the sofa.

A sofa can be knock-downed without a tool. The sofa includes left and right armrests, a front frame, a seating and a back. The sofa is provided with stowage compartments, each of which is joined by a bolt hole plate located on the frame construction with a bolt connecting medium, and serving as sofa stabilizers are four sofa legs which are placed on at the bottom of the left and right arm frame construction of the sofa.

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 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.

Disclosed is a planar exterior forming square rack pipe, which comprises a rack pipe main body, a joint coupling protrusion part, and a plane forming member, and thus the outer surfaces of the planar exterior forming square rack pipes can be simply formed as a plane without operations such as the attachment of a separate member, such that the coupling of additional objects to the outer surface of the planar exterior forming square rack pipe such as the assembly of a planar panel, the mounting of a shock absorber, the mounting of a name plate, and the fastening of angles is simplified, assembly and mounting for the coupling of the additional objects can be completely carried out, and external foreign material such as dust can be blocked, and the rigidity of the exterior of the planar exterior forming square rack pipe can be reinforced relatively more than that of a conventional rack pipe having a curved shape so as to allow the rack pipe to be used as a pillar for supporting heavy materials or receiving a heavy load, thereby enabling stable support.

The present disclosure provides systems and methods for assembling a device while maintaining the aesthetic appearance and structural integrity of a visible surface of the device. In one or more implementations of the invention, a system includes a first assembly piece with an assembly region that comprises an opening defined by first and second connecting elements. The system further includes a second assembly piece and a fastening assembly, where a portion of the second assembly piece is shaped to fit within the assembly region opening and the fastening assembly spans the first and second connecting elements to secure the first assembly piece to the second assembly piece, and tightening of the fastening assembly causes the second connecting element to deform, pressing a surface of the second assembly piece against an adjacent surface of the first connecting element and retaining a substantially even visible surface of the device.

The present disclosure provides systems and methods for assembling a device while maintaining the aesthetic appearance and structural integrity of a visible surface of the device. In one or more implementations of the invention, a system includes a first assembly piece with an assembly region that comprises an opening defined by first and second connecting elements. The system further includes a second assembly piece and a fastening assembly, where a portion of the second assembly piece is shaped to fit within the assembly region opening and the fastening assembly spans the first and second connecting elements to secure the first assembly piece to the second assembly piece, and tightening of the fastening assembly causes the second connecting element to deform, pressing a surface of the second assembly piece against an adjacent surface of the first connecting element and retaining a substantially even visible surface of the device.

A frame corner member includes an elongated hollow extrusion having a central corner portion and two leg portions extending from the central portion. Each leg portion includes an inner side wall spaced from and parallel to an outer side wall, and merging with the central portion. An outer end wall joins the inner and outer side walls, which each include an inner surface facing the inner surface of the other side wall. An opening through the outer end wall defines a space between the inner and outer side walls adjacent one end of the extrusion for receiving one end of one of frame side members and end members. At least one of the inner surfaces in the space has discrete surface features adapted to grip and retain the one end of one of the side members and end members in the space when received through the opening.

A frame corner member includes an elongated hollow extrusion having a central corner portion and two leg portions extending from the central portion. Each leg portion includes an inner side wall spaced from and parallel to an outer side wall, and merging with the central portion. An outer end wall joins the inner and outer side walls, which each include an inner surface facing the inner surface of the other side wall. An opening through the outer end wall defines a space between the inner and outer side walls adjacent one end of the extrusion for receiving one end of one of frame side members and end members. At least one of the inner surfaces in the space has discrete surface features adapted to grip and retain the one end of one of the side members and end members in the space when received through the opening.