Guiding structure for regulating traveling direction of swing arm

1. Field of the Invention A guiding structure for regulating a traveling direction of a swing arm has a swing arm, a rotating device having a rotary axis, and a conversion mechanism provided along the rotary axis of the rotating device for transmitting a rotary force caused by the rotating device to the swing arm and for regulating a traveling direction of the swing arm in accordance with a prescribed traveling path. The traveling direction of the swing arm is regulated by the conversion mechanism from a rotary direction to a thrust direction parallel to the rotary axis through an arcuate motion.