Leicht rollstuhl / Wheel chair

The common-used wheelchair operates transferring the power in the ratio of 1 to 1 equal,
the power of spinning the wheels by hands and the rotation of the wheels.
This of physical power transferring structure would not be the burden to the general people.
However, people using wheelchairs tend to have physical penalties and to them,
the wheelchairs might feel like burden.
Therefore, we tried to solve applying the one-way direction power transferring structure
of bicycle’s ‘gear and socket-wrench’