Patent ID: 8109805

Claim:
A toy vehicle, wherein (a) a toy vehicle main body includes a chassis and carriage frames mounted to a front and a rear of the chassis, (b) the carriage frame mounted to one of the front and rear portions is provided with a pair of first wheel devices for a toy vehicle, wherein: (i) the first wheel device is adapted to be placed on a pair of rails and comprises a first axle and first and second wheels provided on opposite sides of the first axle, (ii) the first wheel comprises a first wheel main body rolling on one of the rails and a first flange guided by the one rail and the first wheel main body and the first flange are made of a synthetic resin, and (iii) the second wheel comprises a second wheel main body rolling on the other of the rails and a second flange guided by the other rail and at least the second wheel main body is formed of a member attracting with a magnetic force, and wherein the first axle is formed with a gear, (c) the carriage frame mounted to the other of the front and rear portions is provided with a pair of second wheel devices for a toy vehicle, wherein (d) the second wheel device is adapted to be placed on a pair of rails and comprises a second axle and third and fourth wheels provided on opposite sides of the second axle, (e) the third wheel comprises a third wheel main body rolling on one of the rails and a third flange guided by the one rail and the third wheel main body and the third flange are made of a synthetic resin, (f) the fourth wheel comprises a fourth wheel main body rolling on the other of the rails and a fourth flange guided by the other rail, and (g) the fourth wheel main body comprises the second axle and formed of a member attracting with a magnetic force, wherein (h) the second axle is provided with a conductive ring electrically conductive ring electrically conductive with the second axle between the third wheel and the fourth wheel; wherein (i) the chassis is provided with a drive motor and a gear train for transmitting rotation of the drive motor to the gears of the pair of first wheel devices for a toy vehicle, (j) the chassis is provided with a first conductive contact coming in sliding contact with one of the conductive rings of the pair of second wheel devices and a second conductive contact coming in sliding contact with the other conductive ring, the first conductive contact being electrically connected to one of a positive terminal and a negative terminal of the drive motor and the second conductive contact being electrically connected to the other of the positive terminal and the negative terminal of the drive motor.