Patent ID: 8556347
Filing Date: 2013-10-15
Classification: A61G

Abstract:
1. A sit/stand assistance device comprising: a seat having a first pivoting portion and a second pivoting portion; and a seat pad fixed to the first and second pivot portions a frame; a lifting device having a fixed portion and a movable portion telescopically or linearly guided in the fixed portion, the movable portion being able to retract or extend from the fixed portion; one of the fixed portion or the movable portion being coupled to said frame, the other one being coupled to said first pivoting portion so as to move said seat in a substantially vertical up or down direction while the seat pad remains in a generally horizontal orientation during a first sequence of movements; a driving device having a link, a power portion, and a working rod; said link having two ends, one end of said link being pivoted on the second pivoting portion of said seat, the other end of said link being pivoted relative to said frame; one of said power portion and said working rod being pivoted relative to said link, the other one being pivoted relative to said frame; wherein when said power portion pushes said working rod, said working rod extends out so as to move and tilt said seat pad; wherein a change in a tilting angle of the seat pad during a second sequence of movements is larger than a change in a tilting angle during a first sequence of movements.