Pull-out guide for a drawer

1. An extension guide for a drawer, said extension guide comprising:

a carcass rail to be fixed to a furniture carcass; a drawer rail to be fixed to the drawer;

a central rail mounted movably between said carcass rail and said drawer rail; and a running carriage including a first rolling body and a second rolling body mounted displaceably between said central rail and said drawer rail such that said first rolling body and said second rolling body each run on a respective one of at least two support profiles of said central rail, each of said at least two support profiles having a substantially L-shaped cross section and being a separate structural unit fixed to said central rail;

wherein said central rail has a substantially U-shaped cross section with two vertical legs and a horizontal bar interconnecting said two vertical legs, a first one of said at least two support profiles being fixed to a first one of said two vertical legs, and a second one of said at least two support profiles being fixed to a second one of said two vertical legs; and

wherein said central rail and said at least two support profiles are arranged such that each of said first rolling body and said second rolling body of said running carriage contacts and runs on a lower surface of said respective one of said at least two support profiles, said lower surface of each of said at least two support profiles being below a plane of a lower surface of said horizontal bar such that no part of said at least two support profiles contacts a top surface of said horizontal bar and such that each of said at least two support profiles is fixed solely to a respective one of said two vertical legs of said central rail.

2. The extension guide as set forth in claim 1 , wherein said running carriage is configured to engage under said at least two support profiles during use of the extension guide so that said first rolling body and said second rolling body safeguard against lifting of said central rail.

3. The extension guide as set forth in claim 1 , further comprising a contact leg arranged on said drawer rail, said drawer rail being configured to engage under said first rolling body and said second rolling body of said running carriage during use of the extension guide so that said contact leg safeguards against lifting of said running carriage.

4. The extension guide as set forth in claim 1 , wherein each of said at least two support profiles extends in the longitudinal direction of said central rail along only between 20% and 60% of said length of said central rail.

5. The extension guide as set forth in claim 4 , wherein each of said at least two support profiles extends in the longitudinal direction of said central rail along only between 30% and 40% of said length of said central rail.

6. The extension guide as set forth in claim 1 , wherein at least one of said at least two support profiles includes an abutment configured to limit a movement of said rolling body in the longitudinal direction of said central rail.

7. The extension guide as set forth in claim 1 , wherein said at least two support profiles are arranged above a horizontal central plane of said central rail, said horizontal central plane being notional during use of the extension guide.

8. The extension guide as set forth in claim 7 , wherein said at least two support profiles are arranged completely above a horizontal central plane of said central rail.

9. The extension guide as set forth in claim 1 , wherein each of said at least two support profiles is at least partially comprised of metal.

10. The extension guide as set forth in claim 9 , wherein each of said at least two support profiles is entirely comprised of metal.

11. The extension guide as set forth in claim 1 , wherein each of said at least two support profiles is welded to said central rail.

12. The extension guide as set forth in claim 1 , wherein each of said at least two support profiles has a one-piece construction.

13. The extension guide as set forth in claim 1 , wherein bends between each of said two vertical legs and said horizontal bar are formed at an angle of between 80° and 100°.

14. The extension guide as set forth in claim 13 , wherein said bends between each of said two vertical legs and said horizontal bar are formed at an angle of 90°.

15. The extension guide as set forth in claim 1 , wherein a first limb of each of said at least two L-shaped support profiles bears against a respective one of said two vertical legs, and a second limb of each of said at least two L-shaped support profiles is oriented substantially perpendicular to said respective one of said two vertical legs.

16. The extension guide as set forth in claim 15 , wherein said first rolling body and said second rolling body are configured to run on a downwardly-facing side of said second limb of each of said at least two support profiles during use of the extension guide.

17. The extension guide as set forth in claim 1 , wherein said first rolling body and said second rolling body have different diameters.

18. The extension guide as set forth in claim 1 , wherein said first one of said at least two support profiles is fixed to a first lateral side of said central rail, and said second one of said at least two support profiles is fixed to a second lateral side of said central rail opposite said first lateral side.

19. The extension guide as set forth in claim 1 , wherein each of said at least two support profiles extends in a longitudinal direction of said central rail along only a portion of a length of said central rail, said portion of said length of said central rail being located closer to a rear wall of the drawer than to a front wall of the drawer.