| 摘要 |
An invalid chair such as a wheelchair for partially disabled paraplegic persons has a pivotally mounted seat mechanically coupled to a movably mounted foot rest structure. By shifting and altering his weight distribution, the chair occupant can depress the foot rest structure from a raised foot-supporting position to a lowered ground-engaging position. At the same time, the seat moves angularly upward and forwardly from a substantially horizontal orientation in a seating support position to a substantially upright back-supporting orientation in a relatively displaced standing support position. Thus, the seat exerts a supporting pressure from behind to the body of the chair occupant and assists his movement in rising from a sitting posture to a standing posture. The arrangement also permits the chair occupant likewise to control reverse movement in changing from a standing posture to a sitting posture by controlling his weight distribution and pressure applied to the foot rest structure. Releasable locking means may be provided to hold the seat in its two extreme positions independently of the weight distribution of the chair occupant.
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