| 摘要 |
A wheelchair having a seat, a plurality of legs (32, 34, 36, 38), and a plurality of wheels (72, 74, 76, 78) attached to the legs. The legs are interconnected by a plurality of struts (52, 54, 56, 58, 60, 62). The wheelchair has a seat back (20) pivotally coupled to a seat bottom (10). The seat bottom has a back end (14) with a first curved shape and the seat back has a bottom end (22) with a second curved shape which are sized to mate when the seat back is in an unfolded position. The wheelchair includes an actuator (96) movable between a minimum speed actuator position, a maximum speed actuator position, and a mild-point speed actuator position. An actuator output signal has a magnitude which is linearly related to the position of the actuator. A non-linear amplifier (130) is provided for outputting a motor control signal having its median value when the actuator is located between the mid-point speed actuator position and the maximum speed actuator position. |
