| 摘要 |
An adjustable wheelchair for relieving the effects of contracture generally comprises a base frame assembly and a seat frame assembly pivotally supported by the base frame assembly. The seat frame assembly has a torso section, a seat section and a leg section and is adjustable between a seated position and a supine position. Adjustment of the seat frame assembly between the seated position and the supine position is measurable by an acute angle alpha between the torso section and a vertical reference. The torso section is adapted to articulate with respect to the seat section, measurable by an acute angle beta. The leg section is adapted to articulate with respect to the seat section, measurable by an acute angle theta between the leg section and the seat section. Articulation of the torso section and the leg section with respect to the seat section are constrained such that the angle beta and the angle theta change concurrently with, and within predefined limits according to, the angle alpha as the seat frame assembly is adjusted between the seated position and the supine position.
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