Seat, particularly for public transportation

1. A seat having a carrying frame and a support unit connected thereto, said support unit having a base frame as well as an elastic cover held thereon, said elastic cover being made of a single-piece knitted fabric and is fastened and pre-tensioned on said base frame as a self-supporting structure and said knitted fabric having a knitted fabric width between left and right longitudinal edge regions of said knitted fabric defining a length of said elastic cover in a longitudinal direction, and said cover forming a support surface having a seat region and a back region, wherein said cover is configured to be continuous in said longitudinal direction between said seat region and said back region and said knitted fabric forming said cover has a plurality of zones with different properties with respect to one another located consecutively in said length of said cover, of which at least one zone has a greater elastic deformability relative to the other zones, wherein said zone having the greatest elastic deformability is formed between said seat region and said back region, and wherein on both sides between said zone forming said seat region and said left and right longitudinal edge regions a strip-shaped edge section is arranged and the knitted fabric forming said strip-shaped edge sections has the same properties as said zone having the greatest elastic deformability.

2. The seat according to claim 1 , wherein the zone having the greatest elastic deformability has an elasticity according to DIN EN 14704-1 in a range having a lower limit of 10 N and an upper limit of 40 N, preferably 22 N, with a linear strain of 100%.

3. The seat according to claim 1 , wherein the zone forming the back region has a strength in the strip tensile test according to DIN EN 13934-1 in a range having a lower limit of 700 N and an upper limit of 1400 N, preferably of 1080 N.

4. The seat according to claim 1 , wherein a strip-shaped edge section of the zone of the back region is disposed in each case in the longitudinal edge region of the knitted fabric on both sides of the zone having the greatest elastic deformability.

5. The seat according to claim 4 , wherein in each case a transition between the strip-shaped edge section and a zone end of the zone having the greatest elastic deformability, running transversely thereto, is configured to run in an arcuate shape.

6. The seat according to claim 1 , wherein the zone forming the seat region has a strength in the strip tensile test according to DIN EN 13934-1 in a range having a lower limit of 800 N and an upper limit of 1500 N.

7. The seat according to claim 1 , wherein in each case a transition between the strip-shaped edge section and a zone end of the zone forming the seat region, running transversely thereto, is configured to run in an arcuate shape.

8. The seat according to claim 1 , wherein the support unit comprises at least one base frame and a cladding element which receives said frame.

9. The seat according to claim 8 , wherein the cladding element defines a fixed angle between the back region and the seat region.

10. The seat according to claim 8 , wherein the base frame is detachably connected to the cladding element.

11. The seat according to claim 8 , wherein the cladding element and the base frame are connected to one another and the cover is spanned on its own cover carrying frame and said carrying frame is detachably connected to the support unit comprising the cladding element and the base frame.

12. The seat according to claim 8 , wherein at least one intermediate layer is disposed on an inner surface of the cladding element facing the user, and the intermediate layer is formed from a plastic foam which is configured to be flame-retardant.

13. The seat according to claim 8 , wherein at least one support belt aligned transversely to the longitudinal extension of the cover is provided between the cover and the inner surface of the cladding element.

14. The seat according to claim 1 , wherein in an unused state the seat region is configured to run ascendingly towards the back region with regard to a standing plane for the seat.

15. The seat according to claim 1 , wherein in a used state the seat region is configured to run descendingly towards the back region with regard to a standing plane for the seat.

16. The seat according to claim 1 , wherein the cover is spanned on the base frame.

17. The seat according to claim 1 , wherein a support section of the cover which can face a back-of-the-knee region of the user is configured to be pivotable with respect to the support unit.

18. The seat according to claim 17 , wherein the support section is formed by a frame part of the base frame and/or cover carrying frame which is pivotable with respect to the support unit.

19. The seat according to claim 18 , wherein an actuating device is associated with the frame part by which means said part is adjustable between its readiness position and usage position and wherein the actuating device comprises a detection device associated with the seat region and an adjusting device in line connection therewith and the adjusting device is operatively connected to the frame part.

20. The seat according to claim 1 , wherein a headrest located in front of the cover is held on the support unit in a head region of the cover and the headrest comprises a central part and side parts which are disposed on both sides thereof and are adjustable by means of pivot axes.