| 摘要 |
A system of stacking blocks comprises box-shaped blocks whose upper side is provided with one or more coupling knobs in a uniform pattern with a mutual firm modular distance, and whose underside is provided with complementary coupling means, so that the stacking blocks can be coupled together. According to the invention, the coupling knobs, at least partly, define a rotationally symmetrical surface which has an upwardly rounded or tapering shape to provide guide faces for the complementary coupling means. The largest tranverse dimension of the surface of a block having just one coupling knob is smaller than or equal to the difference between the corresponding diameter of the coupling knobs and twice the modular distance. This provides a stacking block system which, to a greater degree than known before, involves different degrees of difficulty for the positioning and orientation of the blocks during stacking, depending upon the number of coupling knobs on the stacking blocks.
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