초록 ▼

A wheel chair having two rear wheels, two front wheels, a supporting frame, a seal and a backrest, where the seat can be moved from a sitting position to a driving position, and vice versa, and wherein the center of gravity of a user's body is moved rearwardly and downwardly when adjusting from the

A wheel chair having two rear wheels, two front wheels, a supporting frame, a seal and a backrest, where the seat can be moved from a sitting position to a driving position, and vice versa, and wherein the center of gravity of a user's body is moved rearwardly and downwardly when adjusting from the sitting position to the driving position.

대표청구항 ▼

1. A wheel chair (1) comprising at least two rear wheels (2a, 2b), at least two front wheels (3a, 3b), a supporting frame (4), a seat assembly (5) and a backrest assembly (6), wherein the seat (5) can be moved from a passive sitting position to an active driving position, and vice versa, wherein the

1. A wheel chair (1) comprising at least two rear wheels (2a, 2b), at least two front wheels (3a, 3b), a supporting frame (4), a seat assembly (5) and a backrest assembly (6), wherein the seat (5) can be moved from a passive sitting position to an active driving position, and vice versa, wherein the seat (5) is tilted relative to a pivoting point (9) located some distance under the seat (5) upon being adjusted, in such a manner that the center of gravity of a user's body is moved rearwardly in a direction toward the rear wheels (2a, 2b) upon adjustment to the driving position, and that the center of gravity of a user's body is moved forwardly in a direction away from the rear wheels (2a, 2b) upon adjustment to the sitting position, and wherein an angle β included between the seat (5) and the backrest (6) is made smaller upon adjustment to the driving position, and it is made larger upon adjustment to the sitting position, characterized in that the wheel chair (1) comprises a leg support (7), wherein an angle γ included between the seat (5) and the leg support (7) is made smaller upon adjustment to the driving position and larger upon adjustment to the sitting position, and wherein the leg support (7) is moved upwards in a direction towards the rear wheels (2a, 2b) upon adjustment to the driving position, and downwards in a direction away from the rear wheels (2a, 2b) upon adjustment to the sitting position, said leg support (7) being positioned between the two front wheels (3a, 3b). 2. The wheel chair (1) according to claim 1, wherein the angle β included between the seat (5) and the backrest (6) in the sitting position is adjustable. 3. The wheel chair (1) according to claim 2, wherein the angle β included between the seat (5) and the backrest (6) in the driving position is adjustable. 4. The wheel chair (1) according to claim 1, wherein said wheel chair (1) is collapsible. 5. The wheel chair (1) according to claim 2, wherein the backrest (6) is connected to the supporting frame (4) by means of the seat (5) and by means of an arm (13) which is adjustable for length, which arm (13) is pivotally connected to a point of attachment (14) on the supporting frame (4) and to a point of attachment (15) on the backrest (6), wherein several points of attachment for the arm (13) are provided in, respectively, the supporting frame (4) or the backrest (6), which points of attachment (14, 15) substantially lie on a circular arc, which circular arc has as its center the point of attachment (15, 14) on, respectively, the backrest (6) or the supporting frame (4) in the sitting position or in the driving position. 6. The wheel chair (1) according to claim 5, wherein the points of attachment (14, 15) that lie on said circular arc are spaced 5-18 degrees, preferably 7-15 degrees, apart on said circular arc.