| 摘要 |
A roller board is provided to be moved with a little power by rotating wheels connected with a gear and a chain by moving a hydraulic cylinder with power of a footstep. A roller board includes a housing(2), a pair of cylinders(4,4a), a center cylinder(6), and a ratchet gear(8). An upper part of the housing is open. The cylinders are fixed to a front and a rear of the housing. The cylinders are reciprocated up and down according to up and down motion of a footstep. A piston of the center cylinder is reciprocated according to motion of the cylinders. The ratchet converts the reciprocating motion of the piston of the center cylinder into rotary motion. Wheels are rotated according to motion of the footstep by engaging a chain(12) with a pair of chain gears(10,10a). |
