Plane Jigsaw Puzzle

Abstract

A plane jigsaw puzzle has multiple plastic pieces with concavo-convex structures on side edges, where the plastic puzzle pieces are matched and connected to concavo-convex structures. A chamfer angle is set at the edge between pieces, and the height of the chamfer angle to the edge interface of the two adjacent pieces is from 5% to 50%. The contact area of the two opposite adjacent pieces is 95% to 50% of the contact area of the corresponding edges.

1 . A plane jigsaw puzzle comprising a jigsaw formed by assembling multiple plastic-made pieces together and adjacent plastic-made pieces connected together through protruding and notched engaging members formed therebetween and engaging each other, the plane jigsaw puzzle characterized in that: each plastic-made piece has a front surface and a chamfer edge formed adjacent the top surface and having a height being 5% to 50% of a height of a contacting area between adjacent plastic-made pieces. 
     
     
         2 . The plane jigsaw puzzle as claimed in  claim 1 , wherein the chamfer edge is a rounded chamfer edge. 
     
     
         3 . The plane jigsaw puzzle as claimed in  claim 1  further comprising an outer frame mounted around the jigsaw and assembled from multiple frame segments, wherein adjacent frame segments are connected through protruding and notched engaging members formed therebetween and engaging each other to form the outer frame. 
     
     
         4 . The plane jigsaw puzzle as claimed in  claim 3 , wherein each frame segment of the outer frame has an inside edge and at least one protruding or notched engaging member formed on the inside edge respectively engaging at least one protruding or notched engaging member that is formed on an adjacent piece of the jigsaw. 
     
     
         5 . The plane jigsaw puzzle as claimed in  claim 4 , wherein each frame segment has two sides and two sets of at least one protruding or notched engaging member formed respectively on the sides and respectively engaging the sets of the at least one protruding or notched engaging member of adjacent frame segments. 
     
     
         6 . The plane jigsaw puzzle as claimed in  claim 5 , wherein each frame segment of the outer frame has a decoration bar covering the at least one protruding or notched engaging members on the inside edge of the frame segment and covering the at least one protruding or notched engaging member of an adjacent piece that respectively engages that of the frame segment. 
     
     
         7 . The plane jigsaw puzzle as claimed in  claim 3  or  4  or  5  or  6 , wherein the outer frame further has a fastener connecting the frame segments together. 
     
     
         8 . The plane jigsaw puzzle as claimed in  claim 7 , wherein the fastener has multiple mounting slots and reinforcing bars, the mounting slots are defined respectively in bottoms of the frame segments and each reinforcing bar is mounted in and through more than one of the mounting slots to connect the frame segments together. 
     
     
         9 . The plane jigsaw puzzle as claimed in  claim 3  or  4  or  5  or  6 , wherein the outer frame has an anti-skid texture formed on a top surface and an outer surface of the outer frame.