| 摘要 |
A wheelchair comprises wheels 1 driven by a propulsion system comprising reciprocating levers 5. The lever may include a freewheel element and may be connected to the wheel 1 by means of a chain 3 and sprockets 4. The wheel may be suspended using a swing arm 6 supported by a spring element 7. The swing arm 6 and propulsion lever 5 may pivot about a common axis, ensuring that propulsion is unaffected by the suspension. Directional control is provided by a steering mechanism comprising a single pivoting lever 13 controlled by the user's hand and connected to a pivotable steering wheel. The steering lever may be connected to the steering wheel by means of cables. |
