Piece of rotary seating furniture

摘要

A piece of seating furniture having a base and a seat unit, wherein the base and the seat unit have provided between them a pivot bearing including a base-side bearing device and a seat-unit-side bearing device, via which the seat unit is rotatable about a vertical axis in relation to the base, and the pivot bearing has a switchable blocking device, via which the rotary movement capability of the bearing devices in relation to one another can be blocked.

主权项

1. A piece of seating furniture having
a base; a seat unit; and a pivot bearing provided between the base and the seat unit, the pivot bearing comprising a base-side bearing device and a seat-unit-side bearing device, by which the seat unit can be rotated about a vertical axis in relation to the base; the pivot bearing having a switchable blocking device, by which a rotary movement capability of the bearing devices in relation to one another can be blocked; and the blocking device comprising an encircling blocking surface on a first one of the bearing devices, at least one torsion spring which wraps around the encircling blocking surface and being fastened on a second one of the bearing devices and having an internal diameter which is variable in dependence on a stressing state of the at least one torsion spring, and a switching device by which the at least one torsion spring can be subjected to stressing and relieved of stressing; wherein the at least one torsion spring, in a relieved-of-stressing state, butts against the blocking surface and thus prevents relative rotary movement between the bearing devices.