| 摘要 |
PROBLEM TO BE SOLVED: To enable a person, who cannot go up and down on stairs by oneself because of being mainly in a bedridden condition or using a wheelchair, to go up and down on stairs without electricity by using his/her wheelchair or his/her bed.SOLUTION: One end of a tightly winding spiral spring is connected to a building side, another end is connected to a wheelchair or a bed, and the stairs are covered with a board, thereby going up and down on stairs is enabled by one or two attending helpers. |
