Two-purpose roller skate

Abstract

A two-purpose roller skate, includes a shoe body ( 1 ) and a pair of wheel assemblies ( 2,2′ ), each of the wheel assemblies includes a base ( 21 ), the base ( 21 ) having an installation plate ( 211 ) and two parallel side walls ( 212,212′ ) extending downwards from the installation plate ( 211 ), a swing arm ( 22 ) being mounted in a hinging way on a pivot ( 23 ), and on at least one side of the said swing arm ( 22 ) there are formed the first protruding shoulders ( 222,222′ ) and the second protruding shoulders ( 223,223′ ) which can be engaged with the lower end face ( 214 ) and the back end face ( 215 ) of the base ( 21 ) respectively. A stopping mechanism locks said swing arm ( 22 ) on the first position and the second position being at an angle α to each other. The swing arm can provide a firm support for the lower end face of the base to improve the overall rigidity of the wheel assembly.

1 . A two-purpose roller skate, includes a shoe body ( 1 ), and a pair of wheel assemblies ( 2 , 2 ′), at each of the wheel assemblies there is mounted a pair of wheels ( 24 , 24 ′) being secured on the inward cavity of the sole of the shoe body, characterized in that: each of the wheel assembly ( 2 ) includes a base ( 21 ), the base ( 21 ) having a installation plate ( 211 ) and two parallel side walls ( 212 , 212 ′) extending downwards from the installation plate ( 211 ), at the two parallel side walls ( 212 , 212 ′) there are formed coaxial through holes ( 213 , 213 ′); a swing arm ( 22 ), formed a through hole ( 221 ) on its upper end, being mounted in a hinged way on a pivot ( 23 ) passing through the through hole ( 213 ′, 221 , 213 ) mentioned above, the said pair of wheels ( 24 , 24 ′) being mounted on the free end of the swing arm ( 22 ), in at least one side of the said swing arm ( 22 ) there being formed the first protruding shoulders ( 222 , 222 ′) and the second protruding shoulders ( 223 , 223 ′) which can be engaged with the lower end face and the back end face of the base respectively, to make the swing arm ( 22 ) rotate between the first position parallel to the installation plate ( 211 ) and the second position being at an angle of a to the installation plate ( 211 ), the angle α ranging from 110 to 150 degree; a stopping mechanism locking the said swing arm ( 22 ) on the first position and the second position.  
     
     
         2 . The two-purpose roller skate according to  claim 1 , characterized in that: the said stopping mechanism includes a tension spring ( 25 ) disposed on one end of the pivot  23 , a position-limiting claw ( 26 ) and a locking nut ( 27 ); one end of the pivot ( 23 ) having a protruding shoulder ( 231 ), and the tension spring ( 25 ) being disposed between the protruding shoulder ( 231 ) and a side wall ( 212 ′) of the base ( 1 ), the inner hole ( 261 ) of the claw ( 26 ) having a pair of the tenons ( 262 , 262 ′), the pair of the tenons ( 262 , 262 ′) being fitted to a pair of mortises ( 232 , 232 ′) disposed on the pivot ( 23 ), the said nut ( 27 ) locking the position-limiting claw ( 26 ) on one of the shaft shoulders ( 233 ) of the pivot ( 23 ), the two ends of the position-limiting claw ( 26 ) having a pair of curve claw ( 263 , 263 ′) extending inwardly, the pair of curve claw ( 263 , 263 ′) being fitted to a pair of cavities ( 218 , 218 ′) disposed on the side wall ( 212 ), the longer curve claw ( 263 ) of the claws being engaged selectively with the corresponding cavities ( 225 , 226 ) disposed on the swing arm ( 22 ).  
     
     
         3 . The two-purpose roller skate according to  claim 1 , characterized in that: said angle α is 135 degree.  
     
     
         4 . The two-purpose roller skate according to  claim 1 , characterized in that: said first protruding shoulders ( 222 , 222 ′) also include auxiliary protruding shoulders ( 229 , 229 ′); when the swing arm ( 22 ) is locked at the second locked position, the auxiliary protruding shoulders are fitted with the sloping end face ( 219 ) formed on the lower end face of the two parallel side walls ( 212 ,  212 ′) of the base ( 1 ).  
     
     
         5 . The two-purpose roller skate according to  claim 1 , characterized in that: in at least one of the two side faces facing the two parallel side walls ( 212 , 212 ′) of the swing arm ( 22 ) there is disposed a spring groove ( 224 ) in which receives a torsion spring ( 29 ), one end of the torsion spring ( 29 ) being secured on the swing arm ( 22 ), and the other end being secured on the pivot ( 23 ).  
     
     
         6 . The two-purpose roller skate according to  claim 2 , characterized in that: an adjusting shaft ( 3 ) passing through the edge of the sole of the shoe is secured on the end of the pivot ( 23 ) in screwing manner.  
     
     
         7 . The two-purpose roller skate according to  claim 1 , characterized in that: at said installation plate ( 211 ) there is formed a multiplicity of installation holes,