Power transmission mechanism for use in toy vehicle with engine

A power transmission mechanism for use in a toy vehicle with an engine, comprising:

• an input shaft capable of transmitting rotational driving force from an engine;
• an output shaft capable of transmitting the rotational driving force to a driving wheel of the toy vehicle;
• a first gear secured to said input shaft;
• a second gear connectable to said input shaft through a clutch mechanism, said second gear being provided around said input shaft through a one-way clutch that allows said input shaft to rotate freely in a direction of rotation of the driving force from the engine when said clutch mechanism is in a disengaged state but does not permit rotation of said second gear relative to said input shaft in a direction opposite to the direction of rotation of the driving force from the engine;
• a brake mechanism for restraining rotation of said second gear;
• a third gear provided around said output shaft, said third gear being in mesh with said first gear;
• a fourth gear provided around said output shaft, said fourth gear being in mesh with said second gear;
• a first bevel gear secured to said output shaft;
• a second bevel gear provided on said output shaft in a free state to face said first bevel gear, said second bevel gear being secured to said third gear;
• and
• a third bevel gear provided at a fixed position with respect to said fourth gear, said third bevel gear being in mesh with both said first bevel gear and said second bevel gear;
• wherein a gear ratio between said first gear and said third gear is equal to a gear ratio between said second gear and said fourth gear.