SEATING FURNITURE CHASSIS HAVING A HEIGHT-ADJUSTMENT SEAT SURFACE

Abstract

A seating furniture chassis having a height-adjustable seat surface, a drive means, a shaft, a height-adjustment mechanism and a threaded rod, wherein the drive means is coupled to the shaft and is designed to transmit a torque to the threaded rod by means of the shaft, and wherein the height-adjustment mechanism is coupled to the threaded rod and to the seat surface such that a rotation of the threaded rod is converted into a height adjustment of the seat surface by means of the height-adjustment mechanism, characterized in that a longitudinal axis of the shaft is not arranged parallel to a longitudinal axis of the threaded rod.

Claims

1. A seating furniture chassis having a height-adjustable seat surface, a drive means, a shaft, a height-adjustment mechanism and a threaded rod, wherein the drive means is coupled to the shaft and is designed to transmit a torque to the threaded rod by means of the shaft, and wherein the height-adjustment mechanism is coupled to the threaded rod and to the seat surface such that a rotation of the threaded rod is converted into a height adjustment of the seat surface by means of the height-adjustment mechanism, characterized in that a longitudinal axis of the shaft is not arranged parallel to a longitudinal axis of the threaded rod.

2. The seating furniture chassis of claim 1, wherein the seating furniture chassis comprises a bevel gear which is coupled to the shaft and the threaded rod, so that the torque is able to be transmitted from the shaft to the threaded rod via the bevel gear.

3. The seating furniture chassis of claim 2, wherein the bevel gear is configured as an obliquely toothed bevel gear.

4. The seating furniture chassis of claim 1, wherein the seating furniture chassis comprises a further threaded rod which is coupled via the shaft to the drive means.

5. The seating furniture chassis of claim 4, wherein a longitudinal axis of the further threaded rod is not arranged parallel to the longitudinal axis of the shaft.

6. The seating furniture chassis of claim 4, wherein the seating furniture chassis comprises a further bevel gear which is coupled to the further threaded rod and to the shaft.

7. The seating furniture chassis of claim 6, wherein the further bevel gear is configured as an obliquely toothed bevel gear.

8. The seating furniture chassis of claim 1, wherein the height-adjustment mechanism is coupled to the threaded rod and the seat surface such that, with a height adjustment of the seat surface, the seat surface is inclined at the same time.

9. The seating furniture chassis of claim 8, wherein when the seat surface is lifted, an inclination of the seat surface to the front is triggered.

10. The seating furniture chassis of claim 1, wherein when the seat surface is lowered, an inclination of the seat surface to the rear is triggered.

11. The seating furniture chassis of claim 1, wherein the seating furniture chassis comprises a backrest, wherein the backrest is coupled to the height-adjustment mechanism, such that the backrest is inclined when the height of the seat surface is adjusted.

12. The seating furniture chassis of claim 11, wherein when the seat surface is lifted, an inclination of the backrest to the front is triggered.

13. The seating furniture chassis of claim 11, wherein when the seat surface is lowered, an inclination of the backrest to the rear is triggered.

14. The seating furniture chassis of claim 1, wherein the longitudinal axis of the shaft is arranged approximately at right angles to the longitudinal axis of the threaded rod.

15. An item of seating furniture, comprising a seating furniture chassis of claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Further features and advantages of the present invention will become clear with reference to the following description of preferred exemplary embodiments with reference to the accompanying drawings. In this case, the same reference numerals are used for the same or similar components and for components having the same or similar functions. In the drawings:

[0027] FIG. 1 show schematic views of a seating furniture A-D chassis according to an embodiment of the invention;

[0028] FIG. 2 shows a schematic view of the drive means, the threaded rods and the bevel gear from the rear face of the seating furniture chassis; and

[0029] FIG. 3 shows a schematic view of the drive means, one of the threaded rods and the height-adjustment means in a side view.

DETAILED DESCRIPTION OF THE INVENTION

[0030] The seating furniture chassis 100 comprises a height-adjustable seat surface 101 and a backrest 102. The seat surface 101 is coupled to a height-adjustment mechanism 103 which in turn is coupled to threaded rods 104. The threaded rods 104 may be set in rotation by means of a drive means 105. With the rotation of the threaded rods 104, the height of the seat surface 101 is altered. This is able to be seen particularly clearly in FIGS. 1A to 1D.

[0031] With a height adjustment of the seat surface 101, the seat surface 101 is inclined at the same time. If the seat surface 101 is lowered, the region of the seat surface facing the backrest 102 is inclined downwardly relative to the region remote from the backrest 102. If the seat surface 101 is lifted, the region of the seat surface facing the backrest 102 is inclined upwardly relative to the region remote from the backrest 102.

[0032] Moreover, the backrest 102 is inclined when the height of the seat surface 101 is adjusted. An upper region of the backrest 102 is moved to the front relative to a lower region of the backrest 102 when the seat surface 101 is lifted. When the seat surface 101 is lowered, the upper region of the backrest 102 is moved to the rear relative to the lower region of the backrest 102.

[0033] The drive means 105 sets a shaft (not shown) in rotation. The longitudinal axis of the shaft in this case extends horizontally from one side of the seating furniture chassis to the side of the seating furniture chassis opposing this side. The sides are in this case the sides arranged on the right and left in the usual position of use of the seating furniture chassis. These are the sides on which neither the backrest is arranged nor those sides opposing the backrest.

[0034] The rotation of the shaft is transmitted by means of bevel gear 200 to the threaded rods 104. Therefore, it is possible that the longitudinal axes of the threaded rods 104 do not extend parallel to the longitudinal axis of the shaft. In particular, in FIG. 2 it may be seen that the longitudinal axes of the threaded rods 104 extend approximately at right angles to the longitudinal axis of the shaft.

[0035] In FIG. 3 it is shown how the height-adjustment mechanism 103 is coupled to the threaded rods 104, so that a rotation of the threaded rods 104 results in a height adjustment of the seat surface 101.