| 摘要 |
FIELD: entertainment engineering; education engineering. SUBSTANCE: device has rectangular playing field with border arranged along perimeter and flat movable labeled playing members. The playing members are divided into at least two groups distinguished by the same marks. Recess is built in the playing field as multi-leaflet rosette that is deeper than playing member thickness. Each leaflet is circle of radius r symmetrically arranged relative to the central circle of radius R. Leaflet guides are designed as multi-ray cross connection members which neighboring rays are conjugated with the same radius R. The central cross connection member rays are conjugated with the same radius r. Each flat movable playing member is designed as a figure built as intersection of circles of radii equal to r or R. Leaflet circles of radius r intersects the circle of radius R, R>=r. Fixing members are mounted on cross connection member ray surfaces touching recess surface. Cells for receiving the fixing members are available on the recess surface. Holes are done in the playing field recess holding playing members cross connection members axles. Dampers are mounted on the cross connection members axles and handles are fixed for controlling the cross connection members. Every flat playing member is mounted on the playing field with gap to provide its traveling on the playing field bottom. EFFECT: enhanced effectiveness in developing mathematical and logical thinking abilities in children. 6 cl, 6 dwg |
