Patent ID: 8590920

Claim:
A folding wheel chair having a pair of side frames with a pair of wheels, a pair of cross links connecting said side frames each other, and a seat which is foldable by changing the distance between the both side frames, comprising: said seat consists of a front right section, a front left section, a rear right section and a rear left section, whereby said front right and left sections are connected swingably to front edges of said rear right and left sections respectively via a first transverse axis at the rear edges, and are connected swingably to the front portions of said cross links respectively via a second transverse axis, said front right and rear right sections are connected swingably to the right edges of said front left and rear left sections respectively via the first longitudinal axis at the left edges, said rear right and left sections are connected to said cross links respectively via an elastic member, said seat takes the substantially horizontal seating state when the load to said seat is greater than the repellent force of the elastic member, said seat is brought in the stand-up state when said rear right and left sections are lifted up and said front right and left sections are inclined forward when the load to said seat is less than the repellent force of said elastic member.