Patent ID: 6908154

Claim:
A fold-up wheelchair comprising: a chair main body ( 2 ) having a back rest, said chair main body being foldable upward and downward; right and left rear frames ( 6 ) of said chair main body ( 2 ); a pair of right and left rear legs ( 15 ) extending lower rearward, said rear legs being connected to a vertically middle portion of the rear frames ( 6 ) so as to be rotatable forward and rearward; extensible working bodies ( 16 ) connected to the rear legs ( 15 ) and upper end portions of said right and left rear frames ( 6 ) so as to be rotatable forward and backward; a motor ( 17 ) operating the respective working bodies ( 16 ) so as to expand and contract synchronously, said motor being provided in an upper end portion of said working bodies ( 16 ); guides ( 24 ) arranged in right and left sides of the chair main body ( 2 ) in such a manner as to extend forward and backward, front and rear end potions thereof being supported by a pin; a rod ( 25 ) fitted to said guide ( 24 ) so as to be slidable forward and backward, a rear end portion of said rod ( 25 ) being connected to said rear legs ( 15 ) in such a manner as to be rotatable forward and backward; and a front wheel ( 26 ) and a rear wheel ( 27 ) respectively provided in a front lower portion of said chair main body ( 2 ) and a lower end portion of said rear legs ( 15 ).