Item of seating furniture

Abstract

An item of seating furniture includes a carrying frame having a carrying element; a seat frame having a seat surface; and a backrest, wherein the carrying element extends into a region of the backrest; a sliding guide, wherein the seat frame is displaceable in the sliding guide relative to the carrying frame between a front working position and a rear resting position. The item also includes a pelvic support disposed in a rear region of the seat surface and inclined in the front working position in relation to a plane of the seat surface; a frame configured to carry the pelvic support and pivotably movable relative and kinematically coupled to the seat frame; a thrust bearing configured to support the frame in a displaceable and pivotably movable manner; and a joint connecting the frame to the seat frame at a trailing end portion of the seat frame.

Description

[0001]Priority is claimed to German Patent Application No. DE 10 2009 016 968.7, filed Apr. 14, 2009, the entire disclosure of which is incorporated by reference herein.[0002]The invention relates to an item of seating furniture with a carrying frame and a seat frame which is displaceable in a sliding guide relative to the carrying frame between a front working position and a rear resting position and carries a seat surface, and also with a frame, which is pivotably movable relative to the seat frame and kinematically coupled to the seat frame, for a backrest.BACKGROUND[0003]An item of seating furniture of this type is already widely used in daily life, in particular in offices, and thus forms part of the prior art on account of obvious prior use. A key aspect of this is the ergonomically beneficial switching between a hollow and a round back during sitting. Supporting of the back in all positions is, in particular, to be allowed. This is achieved by a kinematic coupling of the seat...

AI Technical Summary

Benefits of technology

[0021]A fundamental advantage of the invention also consists in the fact that the complex adaptation to different body weights that was required in the prior art is dispensed with in accordance with the invention. Nevertheless, it has in practice proven to be desirable if the seat surface and / or backrest can be moved into the resting position counter to the restoring force of a spring element, so that the item of seating furniture automatically assumes its upright working position when the user stands up from it. For this purpose, the spring can be designed as a simple coil spring and integrated into the sliding guide of the seat surface.

[0022]The thrust bearing can be formed in a simple manner by a mere bearing surface. A modification in which the thrust bearing is designed as a sliding or roller bearing and thus permits at the same time both a displacement of the frame on the thrust bearing and a pivoting movement about the thrust bearing is, on the other hand, particularly expedient. In addition to ball bearings, wheels or rollers, which can also be designed in a profiled manner, as well as sliding bearings, which can preferably have a friction-reducing coating, made of PTFE for example, are also suitable for this purpose.

[0023]Furthermore, a development in which the seat frame carries a front seat cushion and the frame carries a pelvic cushion, directly adjoining the front seat cushion, of the pelvic support, thus providing an appealing and high-quality aesthetic appearance, has also proven particularly promising.

[0024]The item of seating furniture may be embodied in a broad range of forms. According to a particularly advantageous configuration, the item of seating furniture can be designed as a working chair, office chair, waiting chair, for example in the waiting region of an airport, resting chair or else as the seat of a motor vehicle, aircraft or rail vehicle, as a treatment chair in the medical and therapeutic sector, and also as a hairdressing chair or the like, wherein pure resting armchairs can also advantageously be equipped with the movement kinematics according to the present invention.

Problems solved by technology

The previously known items of seating furniture of the aforementioned type have been found to have the drawback that although the seat surface is movable and an ergonomically correct relative position between the seat surface and the backrest can also be set, a relative position, which automatically adapts to these different seat positions, of individual partial regions of the seat surface has in the past not been implemented or taken into account in this regard.

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