Seat.

摘要

1. A chair comprising a seating face portion supported on legs and a back, wherein the seating face portion consists of two parts the planes of which define between them an angle for positioning the thighs, the pelvis and the vertebral column, the seating face portion comprising only two supporting planes (4a, 4b), with the first part (4a) being a substantially horizontal plane and the second part (4b) being directly connected to the back (5) of the chair, characterized in that the second part (4b) is flat and inclined downwardly towards the back in view of the vertebral column, and defines an acute angle (alpha) with said back at its corresponding end, which end is the lowermost point of said back (5), that the seating face portion - due to its second part (4b) intersecting with the back (5) - with its first part (4a), exclusively intended for the thighs, and with its second part (4b), exclusively intended for the vertebral column, forms a first V-shaped angle having an upper summit and a second V-shaped angle having a lower summit, in that the part (4b) connected to the back (5) is slightly longer than the other part (4a) of the seating face (4), and in that the two parts (4a, 4b) of the seating face (4), at the concave side, form an angle (beta) in the order of 150 degrees.