A block may comprise a base comprising a first block side comprising a first side plane and a connective protrusion coupled to the base and extending distally outwardly and substantially perpendicularly from the first side plane. The connective protrusion may comprise a center pillar coupled to the base extending distally outward from the first side plane, a base portion coupled to the center pillar and the base and extending axially and substantially perpendicularly from the center pillar in a first direction, and an overhang portion coupled to the center pillar extending axially and substantially perpendicularly from the center pillar in a second direction opposite the first direction such that there is an overhang space between the first side plane and the overhang portion. The block may further comprise additional connective protrusions, and the connective protrusions of multiple blocks may enable the coupling of such blocks.

The present invention provides a connecting structure for plate members, including a projection projected from one of the plate members in a first direction, and a groove provided on the other of the plate members to have inner faces facing each other in a second direction intersecting the first direction and configured to fittingly receive the projection. The projection includes a main body, a resilient portion provided on one side of the main body in the second direction and resiliently inwardly deformable in the second direction, and an engagement portion outwardly expanded in the second direction from the resilient portion and configured to be plastically deformed along and engage with one of the inner faces of the groove when the groove fittingly receives the projection.

A system comprising a plurality of blocks is disclosed. Each block has a cuboid body and a connecting member extending away from each corner of the cuboid body, such that for each connecting member there is a first opposed connecting member, a second opposed connecting member and a third opposed connecting member, and a connector engagement arrangement is defined between a connecting member and each of the first, second and third opposed connecting members. The system also comprises a plurality of connectors, each connector having a body with a first connection end for engagement with a connector engagement arrangement of a first block and a second connection end for engagement with a connection engagement arrangement of a second block so as to connect the first block to the second block.

Disclosed herein is a toy building unit for playing capable of folding from a flat position into a three-dimensional hollow position.

The application relates to a field of object connection and in particular, relates to a basic connecting block and a connecting block group. The basic connecting block includes a connecting block body, wherein at least one protrusion corner is provided on one side of the connecting block body and same number of inward recesses as the protrusion corner are provided on an opposite side of the connecting block body, and wherein a surface contour of the protrusion corner is consistent with that of the inward recess, the protrusion corners are connected with each other and the inward recesses are communicated with each other.

A stackable block, comprising: a wall having an inner surface and an outer surface, the wall comprising a strip of material having a first end and a second end with a plurality of transverse fold lines spaced there between, the wall configured to define a structure having an upper perimeter and a lower perimeter, wherein the structure is formed by the strip being folded about the transverse fold lines and the first and second ends being connected together, and wherein at least a portion of the inner surface is vertically offset from the outer surface such that the upper and lower perimeter have stepped configurations.

A toy construction block kit is disclosed. The basic unit of the toy construction block unit has three basic sides, with two side walls and a connecting wall. Each of the two side walls have ‘tongues” extending from their interior sides. The back connecting wall has means for reversibly capturing the tongues. The construction block units have two tongues that stick out from opposing walls, and a distal part which contains a double receiving clip. As each construction block unit has the two tongues and a double receiving clip, when two blocks are pushed together, they double lock. The construction block unit can be attached to one or more other construction block units, or could be attached to a blank cube.

A construction toy system including a plurality of modular assembly pieces and a plurality of pivotal-rods. Each of the pivotal-rods includes an identical engaging rod-tips on each end thereof. Each of the assembly pieces have identical thickness and a circumferential edge. A number of straight receiving grooves are formed, inwardly, at the circumferential edge, wherein the identical thickness is predesigned to fittingly fill the gap formed by the straight receiving groove. A select assembly piece is configured to interlock with another assembly piece via the straight receiving grooves of both selected assembly pieces. A selected assembly pieces may have at least one identical circular through hole formed at a central location with respect to the lateral dimension of the assembly pieces, wherein an engaging rod-tip of a selected pivotal-rod may engage with a selected circular through hole of the selected assembly piece.

A connection device and system is disclosed that is made up of a flexible grid and durable connectors for removable insertion into spaces of the grid.

The present invention provides a connecting structure for plate members, including a projection projected from one of the plate members in a first direction, and a groove provided on the other of the plate members to have inner faces facing each other in a second direction intersecting the first direction and configured to fittingly receive the projection. The projection includes a main body, a resilient portion provided on one side of the main body in the second direction and resiliently inwardly deformable in the second direction, and an engagement portion outwardly expanded in the second direction from the resilient portion and configured to be plastically deformed along and engage with one of the inner faces of the groove when the groove fittingly receives the projection.