Feet-swinging-type roller skate of concave plastic panel

Abstract

A feet-swinging-type roller skate of concave plastic panel ( 1 ) comprises a concave plastic panel ( 1 ) and a universal wheel ( 2 ). The top of the two concave plastic panels ( 1 ) is in the shape of a concave. The front top and rear top of the concave plastic panel ( 1 ) are respectively provided with the universal wheel ( 2 ) on their lower ends. The feet-swinging-type roller skate of concave plastic panel ( 1 ) should be used in pairs.

1 . A feet-swinging-type roller skate of concave plastic panel, wherein: comprising a concave plastic panel and universal wheels, said concave plastic panel is in the shape of a concave-shaped top, the universal wheels are respectively mounted at the lower ends of the concave front top and rear top of the concave plastic panel, two feet-swinging-type roller skates of concave plastic panel are matched in pairs to use. 
     
     
         2 . The feet-swinging-type roller skate of concave plastic panel of  claim 1 , wherein: the concave front top and rear top of said concave plastic panel each has one perforation for up and down, a downward protrusion of pot bottom shape is disposed below the perforation of the concave plastic panel, a connecting bolt of the top of said universal wheel passes through the perforation, wherein the connecting bolt is coordinating with a nut so as to be screwed. 
     
     
         3 . The feet-swinging-type roller skate of concave plastic panel of  claim 2 , wherein: a counterbore is disposed on the upper portion of said perforation, said nut falls into the counterbore after screwing. 
     
     
         4 . The feet-swinging-type roller skate of concave plastic panel of  claim 3 , wherein: further comprising a cover, said cover places on said counterbore. 
     
     
         5 . The feet-swinging-type roller skate of concave plastic panel of  claim 4 , wherein: said cover is a plastic cover. 
     
     
         6 . The feet-swinging-type roller skate of concave plastic panel of  claim 1 , wherein: said concave plastic panel is injection molded. 
     
     
         7 . The feet-swinging-type roller skate of concave plastic panel of  claim 1 , wherein: the concave front top and rear top of said concave plastic panel tilt slightly toward the front down. 
     
     
         8 . The feet-swinging-type roller skate of concave plastic panel of  claim 1 , wherein: said concave plastic panel is an injection piece that the side thereof is concave shape and the overlook shape of the panel surface is olive shape, longitudinal and transverse reinforcing ribs are distributed on the whole bottom of said concave plastic panel. 
     
     
         9 . The feet-swinging-type roller skate of concave plastic panel of  claim 3 , wherein: a bearing is inlaid into the top of the wheel fork of said universal wheel, one bolt is cup jointed inside the bearing bore, a PU wheel is connected to the wheel fork, one said universal wheel is connected with the perforation carrying a counterbore of the concave front top of said concave plastic panel via a nut, one said universal wheel is connected with the perforation carrying a counterbore of the concave rear top of said concave plastic panel via a nut, two said universal wheels form the same forward tilt angle with said concave plastic panel after connecting. 
     
     
         10 . The feet-swinging-type roller skate of concave plastic panel of  claim 5 , wherein: said plastic cover is a plastic cover of dome shape, one said plastic cover is inlaid in the counterbore of the concave front top of said concave plastic panel, the other one said plastic cover is inlaid in the counterbore of the concave rear top of said concave plastic panel.