| 摘要 |
A mobility aid comprises a four-legged walking frame characterized by the front legs of the frame having ground-engaging wheels (9) with axes (8) movable in unison in the direction of the lengths of the legs, by one-way wheel-driving means responsive to upwards movement of said wheel axes (8) to cause forward rotational motion of the wheels (9), and by resilient means (14) acting to urge said wheel axes (8) downwardly of the front legs. In the freestanding condition of the frame, the resilient means (14) lift the front of the frame so that when the frame is pressed down the user bearing down on the frame, the wheels (9) are caused to rotate in the sense to cause forward movement of the aid, the rear legs dragging as a result. A repeated bearing down action, easily accomplished even by the severely handicapped, thus results in easily controllable forward motion of the aid. |
