Hand Thrown Flying Toy

Abstract

A hand thrown flying toy is provided, which has a simple structure having a convex surface portion and a concave surface portion, which are connected by a plurality of linear edge portions. The convex and concave surface portions are configured to generate a plurality of general pattern of loci of flight through fluid dynamic effects based on throwing force thrust and throwing angle. The air flow around the toy is changed by such parameters such that the various aerodynamic forces are generated, resulting the plurality of general pattern of loci of the flight of the toy.

1 . A hand thrown flying toy comprising:
 a convex surface portion having a shape of a partial outer surface of a cylindrical shell extending along a first direction, the cylindrical shell having a predetermined thickness;   a concave surface portion having a shape of a partial inner surface of the cylindrical extending along the first direction;   a plurality of linear edge portions, each of which defining a first joining edge between the convex surface portion and the concave surface portion and extending along the first direction; and   a plurality of curved edge portions, each of which defining a second joining edge between the convex surface portion and the concave surface portion, wherein each of the plurality of curved edge portions is substantially semi-circular in shape and connects the plurality of linear edge portions,   wherein the convex and concave surface portions are configured to generate a plurality of general pattern of differences in air flow around the hand thrown flying toy so as to obtain a plurality of loci of flight based on throwing force thrust and throwing angle.   
   
   
       2 . The hand thrown flying toy of  claim 1 , wherein the concave surface portion is configured to be inscribed by a circle of diameter from about 2.5 inches to about 4.5 inches. 
   
   
       3 . The hand thrown flying toy of  claim 2 , wherein the circle has a diameter of 3.0 inches. 
   
   
       4 . The hand thrown flying toy of  claim 2 , wherein the circle has a diameter of 4.0 inches. 
   
   
       5 . The hand thrown flying toy of  claim 4 , wherein a thickness between the convex surface portion and the concave surface portion is substantially even across the surface portions. 
   
   
       6 . The hand thrown flying toy of  claim 4 , wherein a thickness between the convex surface portion and the concave surface portion is thicker in a central portion than in an edge portion. 
   
   
       7 . The hand thrown flying toy of  claim 4 , wherein a thickness between the convex surface portion and the concave surface portion is thinner in a central portion than in an edge portion. 
   
   
       8 . The hand thrown flying toy of  claim 1 , wherein the convex surface portion is slightly curved-up along a central portion. 
   
   
       9 . The hand thrown flying toy of  claim 1 , wherein the convex surface portion is concave along a central portion with a predetermined curvature. 
   
   
       10 . The hand thrown flying toy of  claim 9 , wherein the predetermined curvature of the central portion of the convex surface portion is smaller than a curvature of the cylindrical shell. 
   
   
       11 . The hand thrown flying toy of  claim 1 , further comprising a soft and resilient edge disposed around each of the convex surface portion and the concave surface portion. 
   
   
       12 . The hand thrown flying toy of  claim 1 , wherein the convex surface portion comprises a film of high reflectivity against visible light, and wherein the concave surface portion comprises a film of low reflectivity against visible light. 
   
   
       13 . The hand thrown flying toy of  claim 1 , wherein the convex surface portion comprises a film of low reflectivity against visible light, and wherein the concave surface portion comprises a film of high reflectivity against visible light. 
   
   
       14 . The hand thrown flying toy of  claim 1 , wherein the convex surface portion comprises a film of night glow. 
   
   
       15 . The hand thrown flying toy of  claim 1 , wherein the concave surface portion comprises a film of night glow. 
   
   
       16 . The hand thrown flying toy of  claim 1 , wherein the convex surface portion comprises a plurality of patterns. 
   
   
       17 . The hand thrown flying toy of  claim 1 , wherein the plurality of loci of flight comprises an up-climbing locus, a curving-to-the-left locus, a curving-to-the-right locus, and a returning-curve locus.