Patent ID: 9723926
Date: 2017-08-08
CPC Classifications: A47C,A61G

Claim:
1. Piece of seating furniture comprising: a base; and a seating unit; wherein between the base and the seating unit provision is made of a rotary mounting means comprising a base-side bearing device and a seating-unit-side bearing device by means of which the seating unit is rotatable about a vertical axis relative to the base; wherein the rotary mounting means has a switchable blocking device by means of which rotatability of the bearing devices with respect to one another is blockable; wherein the blocking device is configured for form-fitting coupling of the bearing devices and has two profiles comprising an inner profile which is attached to a first one of the bearing devices in a rotationally fixed manner and an outer profile which is attached to a second one of the bearing devices in a rotationally fixed manner; wherein the outer profile and the inner profile are displaceable with respect to one another in a direction of the vertical axis such that the outer profile and the inner profile are axially movable between an engaging relative position rotationally coupled in a form-fitting manner and a releasing relative position; and wherein the piece of seating furniture has a stand-assistance function by way of which a seating surface can be raised, wherein the blocking device is operatively coupled to the stand-up assistance function such that when the stand-up assistance function is actuated, the blocking device takes up a blocked state in that application of force to a force-introduction surface is brought about or dispensed with by activation of the stand-up assistance function.