The idea is, that (the blue) stick is strapped around the waist. The (gray)
wheel is exocentric in order to make the 'center' move up and down, when the
lady wearing it is walking. The (red) lever is attached to the blue stick by
means of a hinge, enabling it to move the right-hand end up and down. The (green)
lever is attached to the red one with another hinge, and finally attached to the
(purple) dildo-slider with another.
NOW; when the wearer is walking, she'll be performing an up-and-down movement,
witch will be the one component in moving the dildo inside her. The other part
of the movement-creation will be that the wheel (while turning) will be moving
the dildo-slider up and down, and thus the dildo will be moving in and out of
her pussy at a quite complex pattern.