| 摘要 |
An extremely simple gear system is disclosed whereby a pair of output gears may be controlled so as to rotate in the same or opposite directions. The gear system is particularly useful as the steering system for a toy vehicle in which a reversible motor drives a pair of steering gears in opposite directions on the same axis. A direction-control element is disposed on the same axis as that of the steering gears and is axially moved from first to second positions by cam mechanisms when the rotational direction of the motor is reversed. The direction-control element engages only one of the steering gears at a given time whereby a toy vehicle with the steering apparatus is controlled by changing the rotational direction of the motor such that the vehicle moves ahead or makes a turn. |
