| 摘要 |
<p>Subject-matter of the invention is driving system for passing fly-over obstacles by invalid chair formed by seating structure (2) , wheels (8) arranged on both sides of the seating structure (2) and at least one front stabilising wheel (10) . The substance of driving system consists in that it is formed by arms (6) which are secured to the seating structure (2) on both of its sides and on which shafts of wheels (8) are arranged slidingly within two extreme positions, cranks (9) arranged on both sides of the seating structure (2), and rotary cross engagement members (3) which are arranged in rear part of the seating structure (2) on its both sides and have arms which are terminated with adhesive end pieces (4), wherein each of the cranks (9) is connected to respective rotary cross engagement member (3) arranged on the same side of the seating structure (2) through geared transmission (5) for transmission of rotary movement of the crank (9) to the rotary cross engagement member (3) , an d the geared transmission (5) is provided with flap (7) for preventing reverse rotating of the crank (9) .</p> |
