Eccentric wheel structure of wind up toy car

Abstract

An eccentric wheel structure of a wind up toy car includes a base, a casing and a wind up motor. The wind up motor is disposed between the base and the casing. The wind up motor includes a wheel axle and two wheels. The wheel axle is inserted through the wind up motor. The two wheels are coupled to two sides of the wheel axle. Particularly, the two wheels are eccentric relative to the wheel axle. When the wheel axle is turned, the wind up toy car is staggered to move by the two eccentric wheels. Compared to a traditional wind up toy car that is erect to move, the present invention is more funny and special.

What is claimed is: 
     
         1 . An eccentric wheel structure of a wind up toy car, comprising a base, a casing and a wind up motor, the wind up motor being disposed between the base and the casing;
 the wind up motor comprising a wheel axle and two wheels, the wheel axle being inserted through the wind up motor, the two wheels being coupled to two sides of the wheel axle, the two wheels being eccentric relative to the wheel axle.   
     
     
         2 . The eccentric wheel structure of a wind up toy car as claimed in  claim 1 , wherein the base has a threaded hole and a protrusion at one end thereof, the casing having a slot at one end thereof, the protrusion being engaged in the slot. 
     
     
         3 . The eccentric wheel structure of a wind up toy car as claimed in  claim 1 , wherein the base comprises a positioning seat thereon, the positioning seat having two buckle members at two ends thereof, the wind up motor being fixed to the positioning seat through the two buckle members. 
     
     
         4 . The eccentric wheel structure of a wind up toy car as claimed in  claim 1 , wherein the base has two grooves close to two sides of the positioning seat, the two wheels extending out of the grooves, respectively. 
     
     
         5 . The eccentric wheel structure of a wind up toy car as claimed in  claim 1 , wherein the two wheels are eccentric relative to the wheel axle in an interlaced way.