Twist board

Abstract

The present invention relates to a board, on the bottom surface of which casters are mounted, wherein the aim of the present invention is to provide a twist board which is configured with simple components to prevent even minor troubles. To accomplish the above aim, the technical features of the twist board of the present invention comprise: a footing on which a user stands upright; a first caster mounted on one side of the bottom surface of the footing; and two second casters mounted to cooperate with the first caster to form an isosceles triangle structure, wherein the second casters have wheels twisted at the angle corresponding to the two oblique sides of the isosceles triangle structure.

1 . A twist board, comprising:
 a footing for a rider to step on and stand on;   a first caster engaged at one side of a bottom surface of the footing; and   two second casters which are engaged to form an isosceles triangle together with the first caster, wherein the wheels of the second casters are arranged obliquely at an angle corresponding to two hypotenuses of the isosceles triangle.   
     
     
         2 . A twist board of  claim 1 , wherein the first caster and the second caster are orientation casters being oblique at one side from the engaged portions. 
     
     
         3 . A twist board of  claim 2 , wherein the footing is divided into two parts, with the second caster being engaged at one footing part, with the first caster being engaged at the other footing part, with the divided footings being connected via a torsion bar. 
     
     
         4 . A twist board of  claim 3 , wherein the first caster is engaged at an extended line of the torsion bar, and the second casters are symmetrically engaged about the extended line of the torsion bar. 
     
     
         5 . A twist board of  claim 1 , further comprising:
 a sitting plate engaged at an upper surface of the footing; and   a third caster which is engaged at a bottom surface of the sitting plate with the sitting plate being extended toward the outer side of the footing.   
     
     
         6 . A twist board of  claim 5 , wherein the front end of the sitting plate is rotatable at the center of the footing by means of a rotating shaft and is extended toward a rear side of the footing, and a plate is formed at an outer side of the footing, and a third caster is engaged at a bottom surface of the plate. 
     
     
         7 . A twist board of  claim 1 , wherein the number of the second casters are two, with an auxiliary wheel being engaged at a bottom surface of the footing while matching with two hypotenuses connected from the first caster to the second caster. 
     
     
         8 . A twist board of  claim 7 , wherein the auxiliary wheel of one side among the auxiliary wheels engaged at two hypotenuses is heavier than that of the auxiliary wheel of the other side. 
     
     
         9 . A twist board of  claim 7 , wherein when the wheels of the first and the second casters come into contact with the ground, the auxiliary wheel does not come into contact with the ground. 
     
     
         10 . A twist board of  claim 8 , wherein when the wheels of the first and the second casters come into contact with the ground, the auxiliary wheel does not come into contact with the ground.