| 摘要 |
A folding puzzle is made of 4N identical block elements of three-dimensional right triangular form. The two right-angle sides of each block element are connected by hinge elements to the correspondingly matching right-angle sides of preceeding and succeeding block elements, such that the block elements are connected in a series. The hinge elements provide folding lines at one side of the block elements to allow adjacent block elements to be folded overlying each other. The series of block elements may be connected in a closed loop, with a continuous tape layer applied over the inner plane surfaces of the block elements for structural stability. The hinge elements may be flexible tape elements, leaf or extruded tab-type hinges, or detachable hinges which allow a closed loop to be opened or to be joined with other series of block elements. Visual indicia, such as letters, numbers, or images, may be applied to the plane surfaces of the block elements so that they can be matched to paired block elements or mixed-and-matched with other block elements.
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