| 摘要 |
<p>A system of elements (1,3',6) of plastic material intended for the composition, by means of frictional insertion, of static or dynamic constructions having a game of didactic purpose, which comprises two kinds of main system elements (1,3'), from which the first kind of elements (1) has the character of a substantially tubular spacer whose end portions form female coupling members having a symmetry of order eight, whilst the second kind (3') of elements has the character of a connector formed by a thin flange (3) provided on both sides with male coupling members (4,5) complementary to the female coupling members of the elements (1) of the first kind but having a symmetry of order four. Preferably, the male coupling members (4,5) of the elements (3') of the second kind comprise, on each side of the flange (3), four hollow cylindrical sleeves (4,5) having circular cross section, and the female coupling members of the elements (1) of the first kind are embodied by the shaping of the walls of the tubular elements (1), which walls are determined, in cross section, by eight circle arcs whose inner radius is equal to the outer radius of the cylindrical sleeves (4,5) of the elements (3') of the second kind. <IMAGE></p> |
