A variable shape frame includes: a plurality of extendable arms (A,B,C,D) arranged to form a frame; and a coupling mechanism (30) that couples ends of adjoining ones of the extendable arms so that the adjoining extendable arms can move together. Each extendable arm includes cross units (20) each formed by two rigid members (21,22) crossing in an X-shape and pivotally coupled by a middle coupling shaft (23), and an end coupling portion pivotally coupling ends of adjoining ones of the cross units. The end coupling portion includes inner end coupling shafts (25) and outer end coupling shafts (24). Each rigid member has a curved shape. The coupling mechanism (30) includes first bent members (26) each pivotally coupling the inner end coupling shaft of one of the extendable arms and the outer end coupling shaft of the other extendable arm, second bent members (27) each pivotally coupling the outer end coupling shaft of the one of the extendable arms and the inner end coupling shaft of the other extendable arm, and bent portion coupling shafts (28) each pivotally coupling the first and second bent members.

A variable shape three-dimensional structure includes: an upper frame (10); a lower frame (20); and a longitudinal coupling member (30) that couples the upper and lower frames. Each of the upper and lower frames includes cross units and an end coupling portion. Each cross unit is formed by two rigid members crossing each other in an X-shape and pivotally coupled together. The end coupling portion pivotally couples the ends of the rigid members of the cross units. The longitudinal coupling member (30) includes a bent unit comprising a first and second bent rigid members (31,32), and a bent portion coupling shaft (33). The first and second bent rigid members are bent in a V-shape. The bent portion coupling shaft pivotally couples the bent portions of the first and second bent rigid members. The upper end of the bent unit (30) is coupled to the upper frame (10) and the lower end of the bent unit (30) is coupled to the lower frame (20).

A quick connecting device and a shower room assembly are disclosed. The quick connecting device comprises an inserting member, a receiving member and a locking key. The inserting member comprises a sheet-like first body, the first body including a first connecting surface configured to fixedly connect an end surface of a corner end of a first track, a first main surface opposite to the first connecting surface, and a columnar insert extending outwards from the first main surface, a first keyway formed on a surface of the columnar insert. The receiving member comprises a sheet-like second body, the second body including a second connecting surface configured to fixedly connect an end surface of a corner end of a second track, a second main surface opposite to the second connecting surface, and a receiver extending outwards from the second main surface, the receiver being provided with a receiving chamber in clearance fit with the columnar insert and the receiver being provided with a second keyway therein. The locking key is configured such that when the columnar insert is inserted into the receiving chamber and the first and second keyways are in a matched state, the locking key restricts exiting of the columnar insert from the receiving chamber. The shower room assembly comprises a track connected at a corner uses the above quick connecting device.

A multidimensional structures that is formed of thirty six interconnecting members in such a manner as to form eight (8) tetrahedrons and six (6) octahedrons thereby providing a structure that is both light weight and strong, the interconnecting members variously intersecting at a central point in the middle of the multidimensional structure and at twelve (12) external connecting points.

A multidimensional structures that is formed of thirty six interconnecting members in such a manner as to form eight (8) tetrahedrons and six (6) octahedrons thereby providing a structure that is both light weight and strong, the interconnecting members variously intersecting at a central point in the middle of the multidimensional structure and at twelve (12) external connecting points.

Provided is a reinforcement structure for a structural body having a plurality of fastening sections for fixing a structural body main body, wherein a reinforcement body, which is provided with: reinforcement sections which are provided around at least a part of the fastening sections; and connection sections which connect the reinforcement sections to each other, and which is formed separately from the structural body main body with either a material same as that of the structural body main body or a material having a higher elastic modulus or strength than that of the structural body main body, is attached to the structural body main body. The fastening sections themselves of the structural body main body and the portions therearound can be reinforced easily and effectively only by attaching the reinforcement body later without changing the basic structure such as a rib structure of the structural body main body.

A method of integrally forming at least one stiffener onto a sheet metal component configured to carry a load is provided including generating a stereolithography file. The stereolithography file includes a surface geometry of the at least one stiffener extending from a surface of the sheet-metal component. The surface geometry of the stereolithography file is sliced into a plurality of thin strips. The plurality of thin strips is substantially parallel to the surface of the sheet metal component. Energy from an energy source is applied to a powdered material such that the powdered material fuses to form the plurality of thin strips. One of the plurality of thin strips is integrally formed with the surface of the sheet-metal component. Each of the plurality of thin strips is integrally formed with an adjacent thin strip to create at least one stiffener.