Active dynamic seating furniture

1. An active dynamic seating furniture with a spring-loaded rocker mechanism for executing movement for a seat portion having a seat surface of said seating furniture relative to, and arranged on, a supporting frame, wherein the seat portion is mounted movably sprung and tiltable on the supporting frame, wherein the spring-loaded rocker mechanism forms at least one lever arm comprising a first stirrup, which is connectible to a rear portion of the supporting frame, and a second stirrup with at least one lever arm, which is connectible to a front portion of the supporting frame, wherein the seat portion is fastened to the rocker mechanism across elastically deformable bearings,

wherein fastening points on the first and second stirrup are provided with elastically deformable spacer disks on which the seat portion is fastened,

wherein the supporting frame has four chair legs, running at a slant toward each other from bottom to top and the stirrups are connected to said chair legs directly, or indirectly at the upper ends of the chair legs, and

wherein the stirrups are each fastened by their respective holding sections indirectly by connection means provided with elastically deformable spacer disks on the supporting frame in the region of each of the chair leg upper ends.

2. The active dynamic seating furniture as claimed in claim 1 , wherein the lever arm or arms of the first stirrup extend substantially in a forward oriented direction, while the lever arm or arms of the second stirrup extend in a substantially backward oriented direction and they intersect each other.

3. The active dynamic seating furniture as claimed in claim 1 , wherein the seat portion is held with the seat surface on the spring-loaded rocker mechanism such that the seat surface can be activated from a starting position into both a forward and a backward tilted position against the spring force of the elastically deformable bearings.

4. The active dynamic seating furniture as claimed in claim 1 , wherein at least one of the stirrups has two lever arms and the two lever arms of this stirrup are joined together in U-shape by a connection arm.

5. The active dynamic seating furniture as claimed in claim 1 , wherein both stirrups have two lever arms and the two lever arms of the respective stirrup are each joined together in U-shape by a connection arm.

6. The active dynamic seating furniture as claimed in claim 1 , wherein the other stirrup has a holding section consisting of two holding arms by which the stirrup is connected to the front part of the supporting frame and one lever arm extends away from the holding section, slanting upward in a direction substantially toward the rear portion.

7. The active dynamic seating furniture as claimed in claim 1 , wherein the supporting frame has four chair legs which run toward each other at a slant from bottom to top and which are joined together at the upper chair leg ends by means of a connection plate.

8. The active dynamic seating furniture as claimed in claim 1 , wherein the lever arms of the two stirrups cross each other in X-shape, looking from the chair side.

9. The active dynamic seating furniture as claimed in claim 1 , wherein the supporting frame and the rocker mechanism are formed as a single piece.

10. The active dynamic seating furniture as claimed in claim 9 , wherein said supporting frame and said rocker mechanism are made of tubular material.

11. The active dynamic seating furniture as claimed in claim 1 , wherein the elasticity and/or spring property of the elastically deformable bearings can be altered by means of an adjustment mechanism.