Structure of pieces of a 3D jigsaw puzzle

Abstract

A 3D jigsaw puzzle includes puzzle pieces each having multiple arms and cutouts structurally complementary to the arms of an adjacent puzzle piece. A surface engagement exists between a peripheral edge defining each of the arms of a puzzle piece and a peripheral edge defining each of the cutouts of the adjacent puzzle piece so that the two adjacent puzzle pieces are combined. A linear engagement exists between opposite sides defining each arm of the puzzle piece and opposite sides defining each cutout of the adjacent puzzle piece.

1 . A 3D jigsaw puzzle comprising puzzle pieces each having multiple arms and cutouts structurally complementary to the arms of an adjacent puzzle piece, characterized in that: 
 a surface engagement exists between a peripheral edge defining each of the arms of a puzzle piece and a peripheral edge defining each of the cutouts of the adjacent puzzle piece so that the two adjacent puzzle pieces are combined,    a linear engagement exists between opposite sides defining each arm of the puzzle piece and opposite sides defining each cutout of the adjacent puzzle piece.    
   
   
       2 . The jigsaw puzzle as claimed in  claim 1 , wherein a wedged-shape cutout is defined in a peripheral edge defining each of the two opposite sides of the arms and of the cutouts of the puzzle pieces.  
   
   
       3 . The jigsaw puzzle as claimed in  claim 1 , wherein the arms and the cutouts are circular in shape.  
   
   
       4 . The jigsaw puzzle as claimed in  claim 2 , wherein the arms and the cutouts are circular in shape.