Toy top

Abstract

A toy top capable of continuing to spin without its spinning being abruptly stopped by contacting a playing surface when the toy top wobbles with a reduction in rotational speed so as to spin longer than an opponent toy top. A toy top includes a shaft portion having a circular shape in cross-section and adapted to come into contact with a playing surface of the playing board for serving as a center of rotation when the toy top spins; a rotating plate having an insertion hole of an inner diameter greater than an outer diameter of the shaft portion, the rotating plate being attached to the shaft portion so as to freely rotate around the shaft portion while the shaft portion is inserted through the insertion hole; and an engagement for permitting the rotating plate to freely rotate and preventing the rotating plate from detaching from the shaft portion when the rotating plate is attached to the shaft portion.

1 . A toy top which is spun on a playing board to play therewith, comprising:
 a shaft portion having a circular shape in cross-section and adapted to come into contact with a playing surface of the playing board for serving as a center of rotation when the toy top spins;   a rotating plate having an insertion hole of an inner diameter greater than an outer diameter of the shaft portion, the rotating plate being attached to the shaft portion so as to freely rotate around the shaft portion while the shaft portion is inserted through the insertion hole; and   an engagement means for permitting the rotating plate to freely rotate and preventing the rotating plate from detaching from the shaft portion when the rotating plate is attached to the shaft portion.   
     
     
         2 . The toy top according to  claim 1 , wherein the insertion hole is disposed in the center of the rotating plate, and the rotating plate is formed in an inverted truncated-conical shape having the insertion hole located at the center thereof. 
     
     
         3 . The toy top according to  claim 1 , wherein the engagement means comprises an engaging projection provided on an outer peripheral surface of the shaft portion and an engaging edge portion formed around the insertion hole on a lower side of the rotating plate. 
     
     
         4 . The toy top according to  claim 2 , wherein the engagement means comprises an engaging projection provided on an outer peripheral surface of the shaft portion and an engaging edge portion formed around the insertion hole on a lower side of the rotating plate. 
     
     
         5 . The toy top according to  claim 3 , wherein the rotating plate includes a cylindrical wall which is formed around an edge of the insertion hole on an upper surface thereof so as to protrude upward, and
 the wall has an inner diameter greater than the outer diameter of the shaft portion and has a height smaller than a length of the shaft portion to permit the rotating plate to tilt with respect to the shaft portion, the rotating plate and the shaft portion being in a point contact with each other when the rotating plate tilts.   
     
     
         6 . The toy top according to  claim 4 , wherein the rotating plate includes a cylindrical wall which is formed around an edge of the insertion hole on an upper surface thereof so as to protrude upward, and
 the wall has an inner diameter greater than the outer diameter of the shaft portion and has a height smaller than a length of the shaft portion to permit the rotating plate to tilt with respect to the shaft portion, the rotating plate and the shaft portion being in a point contact with each other when the rotating plate tilts.   
     
     
         7 . The toy top according to  claim 5 , wherein the wall has cutouts formed therein so as to flex outward when the shaft portion is inserted through the insertion hole of the rotating plate. 
     
     
         8 . The toy top according to  claim 6 , wherein the wall has cutouts formed therein so as to flex outward when the shaft potion is inserted through the insertion hole of the rotating plate. 
     
     
         9 . The toy top according to  claim 1 , further comprising an upper layer section having a function of attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft portion and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section. 
     
     
         10 . The toy top according to  claim 2 , further comprising an upper layer section having a function of attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft portion and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section. 
     
     
         11 . The toy top according to  claim 3 , further comprising an upper layer section having a function of attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft portion and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section. 
     
     
         12 . The toy top according to  claim 5 , further comprising an upper layer section having a function of attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft portion and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section. 
     
     
         13 . The toy top according to  claim 7 , further comprising an upper layer section having a function of attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft portion and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section. 
     
     
         14 . A toy top for a board game, comprising:
 a shaft portion having a circular shape in cross-section and adapted to come into contact with a playing surface of the board for serving as a center of rotation when the toy top spins;   a rotating plate attached to the shaft portion so as to freely rotate around the shaft portion; and   an engagement for permitting the rotating plate to freely rotate relative to the shaft portion and preventing the rotating plate from detaching from the shaft portion.   
     
     
         15 . The toy top according to  claim 14 , wherein the rotating plate is formed in an inverted truncated-conical shape having an insertion hole located at the center of the plate for receiving the shaft portion. 
     
     
         16 . The toy top according to  claim 15 , wherein the engagement comprises an engaging projection provided on an outer peripheral surface of the shaft portion and an engaging edge portion formed around the insertion hole on a lower side of the rotating plate. 
     
     
         17 . The toy top according to  claim 15 , wherein the rotating plate includes a cylindrical wall which is formed around an edge of the insertion hole on an upper surface thereof so as to protrude upward, and
 the wall has an inner diameter greater than an outer diameter of the shaft portion and has a height smaller than a length of the shaft portion to permit the rotating plate to tilt with respect to the shaft portion, the rotating plate and the shaft portion being in a point contact with each other when the rotating plate tilts.   
     
     
         18 . The toy top according to  claim 17 , wherein the wall has cutouts formed therein so as to flex outward when the shaft portion is received by the insertion hole of the rotating plate. 
     
     
         19 . The toy top according to  claim 14 , further comprising an upper layer section for attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft portion and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section. 
     
     
         20 . A toy top, comprising:
 a main body;   a shaft extending from the main body and serving as a center of rotation when the toy top spins; and   a member attached to the shaft so as to freely rotate around the shaft,   wherein the member contacts a playing surface before the main body, when the toy top is rotating.   
     
     
         21 . The toy top according to  claim 20 , further comprising:
 an engagement for permitting the member to freely rotate and preventing the member from detaching from the shaft when the member is rotating.   
     
     
         22 . The toy top according to  claim 20 , wherein the member is formed in an inverted truncated-conical shape. 
     
     
         23 . The toy top according to  claim 21 , wherein the engagement comprises an engaging projection provided on an outer peripheral surface of the shaft and an engaging edge portion formed on a lower side of the member. 
     
     
         24 . The toy top according to  claim 20 , wherein the member includes a cylindrical wall formed around an edge of a hole, on an upper surface thereof so as to protrude upward, which hole receives the shaft, and
 the wall has an inner diameter greater than an outer diameter of the shaft and has a height smaller than a length of the shaft to permit the member to tilt with respect to the shaft, the member and the shaft being in a point contact with each other when the member tilts.   
     
     
         25 . The toy top according to  claim 24 , wherein the wall has cutouts formed therein so as to flex outward when the shaft is inserted through the hole. 
     
     
         26 . The toy top according to  claim 20 , wherein the main body comprises:
 an upper layer section for attacking an opponent toy top, a middle layer section determining a height of the toy top, a lower layer section having the shaft and fitted on the middle layer section, and a coupling member coupling together the upper layer section and the middle layer section.