| 摘要 |
PCT No. PCT/NO89/00004 Sec. 371 Date Jul. 3, 1990 Sec. 102(e) Date Jul. 3, 1990 PCT Filed Jan. 6, 1989 PCT Pub. No. WO89/06118 PCT Pub. Date Jul. 13, 1989.An electrically driven wheel chair for disabled persons wherein a seat support resting on a rigid wheel frame (8) is vertically adjustable by the aid of an electrically driven force transmitting member (12). The seat support comprises an upper frame portion (1) attached to rigid wheel frame (8) via two pairs of scissors-type bars (4,5), each end of the pairs of scissors-type bars being alternately pivotally or pivotally and slidably connected with upper seat support frame (1), and lower rigid wheel frame (8), respectively. Front end (18) of the upper seat support frame (1) is via supporting bars (14,16) and linkage elements connected with wheel frame (8) and simultaneously with pair (5) of scissors-type bars, which is actuated by piston rod (12) to change the height of the seat support. The vertically adjustable support permits an arrangement of footrest and calf support providing continuous change of their position so that the users's legs will have an anatomically correct posture all the time. An additional pair of wheels (19) may be provided on the front portion of the support to take over the contact with the ground from the ordinary pair of front wheels (20) when the seat support is lowered. |
