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    • 9. 发明专利
    • DRAWING TEACHING IMPLEMENT
    • JPH0369987A
    • 1991-03-26
    • JP20474589
    • 1989-08-09
    • KAWAMURA FUMIOALLOY SHOJI KK
    • KAWAMURA FUMIOMORITA YUKICHIOHARA HIDEO
    • G09B23/04
    • PURPOSE:To allow the easy understanding of a stereoscopic structure from the standpoint of drawing by connecting flat plate members having the same shapes as the shapes of the figure drawn on a base plate to the base plate at the straight part by means of hinges or flexible members so that the members can be rotated around the straight parts as an axis center. CONSTITUTION:A tetrahedron is adequate at the stereoscopic pattern to indicate the intersection of two straight lines at the time of teaching a figure forming method to know the real angle formed by the two straight lines when the lines intersect in space by RABAT (Act of turning down) method. The two straight lines are shown by AE and AD and the Aa line intersects perpendicularly with the base plate 1. These lines correspond to the bottom plate of the tetrahedron or the base plate 2. Three sheets of the flat plate members 3 to 5 constitute on thin sheet body when the members are folded down and the planes thereof are paralleled with the base plate plane. This shape allows easy carrying and storage by stacking. A learner is able to learn the figure while observing the shape with eyes and since the members are placed on a desk in the same manner as the figure is imaginable in the brain, the effect of learning the drawing is extremely enhanced.