ELECTRIC WHEELCHAIR EQUIPPED WITH THREE-STAGE VERTICALLY MOVABLE WHEELS CAPABLE OF EASILY CLIMBING OVER OBSTACLES

摘要

The present invention relates to an electric wheelchair capable of allowing a user to pass a protruded or recessed obstacle himself or herself without the aid of another individual. A conventional electric wheelchair has only four fixed wheels and it functions smoothly on a flat road, however, when encountering an obstacle, it is impossible for a disabled person to pass the obstacle himself of herself, and the aid of another individual is essential. To solve the above problem, the present invention aims to allow a disabled person on an electric wheelchair to, when encountering an obstacle, climb over the obstacle himself or herself without stopping the wheelchair. According to the present invention, when encountering an obstacle having a height equal to or greater than a predetermined value, a sensor detects the obstacle, and a user is notified of the presence of the obstacle through an alarm at an armrest portion. At the same time, if the distance between the wheelchair and the obstacle is detected to be a predetermined value, the wheelchair unfolds a raised lift mechanism (first to third wheel units), bends the first wheel unit to be placed above the obstacle (protruding bump), then advances gradually, and raises the lift mechanism in the order of the first wheel unit, the second wheel unit, and the third wheel unit, thereby allowing the user to climb over the obstacle himself or herself without the aid of another individual. According to the present invention, a user of the electric wheelchair can easily climb over an obstacle without the aid of another individual.;COPYRIGHT KIPO 2017