DE102019113655A1 - Rocker swivel chair - Google Patents

Abstract

According to the invention, a chair (2) with a seat (4) and with an underframe (8) for mounting the seat (4) at seat height above an essentially flat floor (10), characterized in that the underframe has a rear rocker arrangement ( 12), which is fastened under the seat surface (4) and is elastically deformable around at least one horizontal rear bending axis (14) oriented transversely under the seat surface (4) prior to fastening, and a swivel joint (20) through which the seat surface (4) is rotatably mounted about a vertical axis (22) on the flat floor (10).

Description

The present invention is directed to the technical improvement of a chair with a seat surface and in particular also a backrest and armrests connected to the seat surface and with an underframe for mounting the seat surface at seat height above a substantially flat floor.

For example the so-called “cantilever chair”, a chair construction from the environment of the “Bauhaus” school, but also the most recent constructions, for example according to the DE262624124340.4 of the applicant are representatives of a type of chairs that offer a certain level of seating comfort thanks to an underframe that resiliently supports the seat.

For example, the cantilever chair has a tubular steel frame to support the seat surface at seat height above an essentially flat floor, and the frame is bent in such a way that (in the intended orientation of the frame) the tube of two (connected to each other at the rear, opening into one another, namely, a left and a right,) standing runners for placing on the floor, which are bent upwards at the front left and right and fixed horizontally under the seat - and in the elastically deformable, only two legs (front) form a rocker arrangement with a transverse bending axis (or momentary pole axis) at the front under the seat.

The respective momentary bending axis (or momentary pole axis) of this resilient construction is due to the construction close to the ground. In other words, a person sitting on it does not only bob up and down (around a bending axis or instantaneous pole axis oriented transversely in the front in the area of the front edge of the seat), but around the (transversely oriented bending axis or instantaneous pole axis at the front, clearly below the Front edge of the seat on the floor) also back and forth. This is widely felt to be uncomfortable. But also alternative constructions like that according to the DE262624124340.4 that overcome this problem are considered to be limited in their use.

The present invention is based on the object of creating a spring-loaded chair whose usability is improved. This object is achieved by a chair with the features of claim 1. Preferred configurations are given in the subclaims.

A chair according to the invention has a seat surface, in particular also a backrest and armrests connected to the seat surface, and an underframe for supporting the seat surface at seat height above an essentially flat floor.

According to the invention, the underframe has a rear rocker arrangement which is fastened under the seat surface (and in particular is set up in such a way that it is elastically deformable around at least one rear bending axis that is essentially horizontal in the intended orientation of the undercarriage and transversely oriented under the seat surface before fastening).

The rear rocker arrangement allows a seated person to rock up and down on it with the pelvis (around a bending axis or instantaneous pole axis, particularly close below the seat surface), but in particular only rock slightly back and forth. The rear rocker arrangement is preferably set up in such a way that this rear bending or momentary pole axis is arranged approximately in the middle over the seat depth of the chair according to the invention (i.e. in particular also essentially over its extent from front to back between the front edge of the seat and the backrest).

• Besonders bevorzugt nämlich weist das Untergestell auch eine vordere Wippanordnung auf, die (insbesondere um mindestens eine in bestimmungsgemäßer Orientierung des Untergestells horizontale, unter der Sitzfläche insbesondere vor der hinteren Biegeachse quer orientierte vordere Biegeachse elastisch verformbar und) unter der Sitzfläche vor der hinteren Wippanordnung befestigt ist.

Preferably, the front edge of the seat surface is either essentially unsprung or even wobbles itself (around a front bending axis or instantaneous pole axis, particularly close below the seat surface), also set up and / or guided in particular for rocking up and down (in particular, however, again only at most slightly for rocking back and forth). The front rocker arrangement is then preferably set up in such a way that this front bending or momentary pole axis over the seat depth of the chair according to the invention (i.e. in particular also essentially over its extent from front to back between the front edge of the seat and the backrest) approximately in the middle and in particular just ahead the rear bending axis is arranged. The rocker arrangements are then preferably set up in such a way that the up and down rocking of the front edge of the seat surface in the opposite direction to the rocking of the rear area of the seat surface and / or because of the lower load (when used as intended) is less pronounced with a lower amplitude:

• It is particularly preferred that the underframe also has a front rocker arrangement which can be elastically deformed (in particular around at least one front bending axis that is horizontal in the intended orientation of the underframe and that is transversely oriented under the seat surface, in particular in front of the rear bending axis, and) is attached under the seat in front of the rear rocker assembly.

Instead of the front rocker arrangement (if the front edge of the seat surface is to remain essentially unsprung), the underframe can also have only one front support arrangement which is fastened under the seat surface in front of the rear rocker arrangement.

The (front and / or rear) rocker arrangement and / or the front support arrangement preferably has an elastic, curved rod (in particular made of steel tube and / or with a circular cross-section), which with a (placed on a floor in the intended orientation of the underframe of the chair) Essentially horizontally transversely extending section under the seat is fastened under the seat and bent from the left and right under the seat a section of the rod is firmly connected in its further course to the underframe - namely with a swivel joint that this so far rocking, sprung construction of the underframe of the seat surface (in particular including the backrest) rotatable about a vertical axis and otherwise immovable underneath on a substantially rigid underframe below the hinge on a floor.

• - bei der hinteren Wippanordnung nach vorne (und insbesondere auch etwas abwärts) und/oder
• - bei der vorderen Wippanordnung nach hinten (und insbesondere auch etwas abwärts) und/oder,
• - wenn die vordere Wippanordnung nur als Stützanordnung ausgebildet ist, nach unten (und insbesondere nur etwas auch nach vorn oder hinten),

bevor sie dann in ihrem noch weiteren Verlauf mit dem Drehgelenk verbunden sind.From the section fastened essentially horizontally transversely under the seat surface, the sections of the rod bent to the left and right run below the seat surface in their further course preferably:

• - with the rear rocker arrangement to the front (and in particular also slightly downwards) and / or
• - with the front rocker arrangement to the rear (and in particular also a little downwards) and / or,
• - if the front rocker arrangement is only designed as a support arrangement, downwards (and in particular only slightly to the front or back),

before they are connected to the swivel joint in their further course.

• 1 eine Seitenansicht und eine räumliche Ansicht eines erfindungsgemäßen Stuhls;
• 2 eine räumliche Ansicht des Untergestells des erfindungsgemäßen Stuhls;
• 3 eine räumliche Ansicht des Untergestells des erfindungsgemäßen Stuhls mit alternativen Füßen;
• 4 eine Seitenansicht und eine räumliche Ansicht einer alternativen Ausgestaltung des Untergestells des erfindungsgemäßen Stuhls und
• 5 eine Seitenansicht und eine räumliche Ansicht einer anderen alternativen Ausgestaltung des Untergestells des erfindungsgemäßen Stuhls.

Further advantages, configurations and details of the invention are described below in the description of exemplary embodiments with reference to the attached figures. Show it:

• 1 a side view and a spatial view of a chair according to the invention;
• 2 a three-dimensional view of the base of the chair according to the invention;
• 3 a three-dimensional view of the base of the chair according to the invention with alternative feet;
• 4th a side view and a three-dimensional view of an alternative embodiment of the base of the chair according to the invention and
• 5 a side view and a three-dimensional view of another alternative embodiment of the base of the chair according to the invention.

According to 1 has a chair 2 a seat 4th , one with the seat 4th connected backrest 6th and a base 8th for storing the seat 4th at seat height above a level floor 10 .

According to 2 and 3 shows the base 8th a rear rocker assembly 12 on the order (in acc 1 proper orientation of the subframe 8th ) essentially horizontal, under the seat 4th transversely oriented rear instantaneous bending axes (or instantaneous pole axes; only one of these virtual axes that migrate during the rocking movement, but essentially remain close to one another, is representatively shown) 14 is elastically deformable.

In addition, the base 8th a front rocker assembly 16 on the order (in acc 1 proper orientation of the subframe 8th ) essentially horizontal, transversely oriented front, instantaneous bending axes (or instantaneous pole axes; here too: only one of these virtual axes, which migrate during the rocking motion, but remains essentially close to one another, is represented representatively) 18 is fastened in an elastically deformable manner - and on a swivel joint 20th , that this so far bobbing sprung construction 12 , 16 of the base 8th the seat 4th (including backrest 6th ) around a vertical axis 22nd rotatable and otherwise essentially immovable underneath, namely on one below the joint 20th essentially rigid base 34 on a floor 10 stores.

So leaves the rear rocker arrangement 12 one on the chair 2 seated person (not shown) with their pelvis on it (around the bending axes or instantaneous pole axes oriented transversely below the seat surface 14th ) up and down, and the front edge of the seat is at the same time 24 rocking (around the bending axes or instantaneous pole axes, which are oriented transversely below the seat surface), also in particular for rocking up and down.

The rocker arrangements 12 , 16 are set up so that the bending or instantaneous pole axes 14th , 18th about the seat depth of the chair 2 (So also essentially about its extent from front to back between the front edge of the seat 24 and backrest 6th ) are roughly in the middle - the bending or instantaneous pole axes 14th the rear rocker arrangement 12 just behind the bending or momentary pole axes 18th the front rocker arrangement 16 .

• Über die Sitztiefe des Stuhls 2 (also insbesondere auch im Wesentlichen über sein Ausmaß von vorn nach hinten zwischen Sitzvorderkante 24 und Rückenlehne 6) jeweils kurz vor der Mitte enden diese Stababschnitte 30, 31 - und knicken dort jeweils in noch weiteren Abschnitten 32, 33 nach innen ab, um sich ungefähr unter dem Bereich der Mitte der Sitzfläche 4 in dem Drehgelenk 20 zu treffen.

Both rocker arrangements 12 , 16 have an elastic bent rod made of tubular steel with a circular cross-section, which is connected to a (in the intended orientation of the base of the chair 2 ) then essentially horizontally transverse section 26th , 27 by means of a welded-on and pierced tab 28 under the seat 4th is to be screwed tight. From which it turns left and right (still under the seat 4th ) one section each 30th , 31 of the rod in the rear seesaw arrangement 12 to the front (and also a little downwards) and with the front rocker arrangement 16 to the rear (and also a little downwards):

• About the seat depth of the chair 2 (So in particular also essentially over its extent from front to back between the seat front edge 24 and backrest 6th ) these rod sections end shortly before the middle 30th , 31 - and bend there in further sections 32 , 33 inward to be roughly below the center area of the seat 4th in the swivel 20th hold true.

Two reduced designs 8th' , 8th" of the invention are in 4th and 5 To see: You are missing the suspension in the front area of the seat 4th .

The base 8th' after 4th has instead of the front rocker arrangement 16 a front support assembly 16 ' whose curved rod also with a then essentially horizontal transversely under the seat 4th running section 26 ' in the form of a welded (and pierced; not shown) tab 28 ' under the seat 4th is to be screwed tight. From this section 26 ' however, there are sections to the left and right 40 of the bar downwards and inwards - and then, however, are again with the rest of the base 34 through the swivel joint 20th rotatably connected.

The base 8th" after 5 has neither the front rocker arrangement 16 nor the front support assembly 16 ' . But the (elastic, curved) rod (made of steel tube with a circular cross-section) of the rear rocker arrangement 12 " has a slightly different course: it is (as far as it is still the same) with an essentially horizontal transverse section 26 " by means of a welded and pierced tab (not shown) under the seat 4th to screw tight. From the section 26 " Turning left and right there is one section each 30 " of the rod forward, but not downward. And now these rod sections end 30 " (via the seat depth of the chair, i.e. in particular also essentially via its extent from back to front between the front edge of the seat 24 and backrest 6th ) not just before the middle, but at the front under the area of the front edge of the seat 24 . There they bend in further sections 32 " inside - and in this form 8th" also directed backwards (a total of around 130 ° to 140 °) - from, to finally find yourself again approximately below the area of the center of the seat 4th in the swivel 20th hold true. In this embodiment, the area is the front edge of the seat 24 so neither by a front rocker arrangement 16 sprung, still through its own support arrangement 16 ' but is supported by the latter kinks between the sections 30 " and 32 " the rear rocker arrangement 12 " .

The swivel joint 20th all configurations 8th , 8th' , 8th" stores this spring-loaded construction that is rocking to the extent that 12 , 16 of the base 8th the seat 4th (including backrest 6th ) around a vertical axis 22nd rotatable - and otherwise immovable underneath, by means of a substantially below the joint 20th rigid lower frame (for example four or five from the joint 20th legs facing diagonally downward 34 or a central pillar 36 , 36 ' that for example made of pipe 36 or several sheet metal contour elements welded together in a star shape 36 ' down in a pedestal 38 for example from star-shaped feet 38 opens) on a floor 10 .

List of reference symbols

2

chair

4th

Seat, area of the seat

6

Backrest, area of the backrest

8th

Underframe

10

ground

12, 12 "

rear rocker arrangement

14th

rear current bending axes or Momentary pole axes (only one of these virtual axes, which migrate during the rocking movement, but essentially remains close to one another, is represented as a representative)

16

front rocker arrangement

16 '

front support assembly

18th

Front, instantaneous bending axes or instantaneous pole axes (only one of these virtual axes, which migrate during the rocking movement, but essentially remains close to one another, is represented as a representative)

20th

Swivel joint

22nd

Vertical axis

24

Seat front edge, area of the seat front edge

26, 27, 30, 31, 32, 33; 26 ', 30', 32 '; 26 ", 30", 32 "; 40

Rod sections

28, 28 '

pierced tab

34

Chair legs

36

central pillar

38

Stand base

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 262624124340 [0002, 0004]

Claims (7)

Chair (2) with a seat (4) and with an underframe (8) for mounting the seat (4) at seat height above an essentially flat floor (10), characterized in that the underframe - has a rear rocker arrangement (12) which is fastened under the seat surface (4) and is elastically deformable around at least one horizontal rear bending axis (14) oriented transversely under the seat surface (4) prior to fastening, and - a swivel joint (20) through which the seat surface (4) is rotatably mounted on the flat floor (10) about a vertical axis (22). Chair (2) according to the preceding claim, characterized in that the rear rocker arrangement (12, 12 ") has an elastic, curved rod which, with a section (26) running essentially horizontally and transversely under the seat surface (4) under the seat surface ( 4) is attached and from which a section (30) of the rod, bent to the left and right, runs forward under the seat (4) and that the sections in their further course (32) can be rotated with the rest of the underframe through the swivel joint (20) are connected. Chair (2) according to the preceding claim, characterized in that the sections (30) of the rod which are bent left and right of the section (26) extending horizontally and transversely under the seat surface (4) are fixed to the swivel joint (32) in their further course (32). 20) and are thus connected by the swivel joint to the underframe (8) so as to be rotatably movably supported at least about a vertical axis (22). Chair (2) according to one of the preceding claims, characterized by a support arrangement (16 ') which is fastened under the seat surface (4) before the rear rocker arrangement (12, 26) is fastened. Chair (2) according to the preceding claim, characterized in that the front support arrangement (16 ') has a curved rod which, with a section (28') running essentially horizontally and transversely under the seat surface (4) under the seat surface (4) is attached and from the left and right bent under the seat (4) a section (40) of the rod runs down and that the sections are rotatably connected in their further course with the rest of the underframe (34) by the swivel joint (20) . Chair (2) according to one of the two preceding claims, characterized in that the front support arrangement (16 ') is a rocker arrangement (16) which is oriented transversely around at least one horizontal under the seat surface (4) in front of the rear bending axis (14) the front bending axis (18) is elastically deformable and / or is attached under the seat surface (4) in front of the rear rocker arrangement (12). The chair (2) according to the preceding claim, characterized in that the front rocker arrangement has an elastic, curved rod which is fastened under the seat (4) with a section (27) running essentially horizontally and transversely under the seat (4) and from the left and right bent under the seat (4) each a section (31) of the rod runs backwards and that the sections in their further course (33) are rotatably connected to the rest of the underframe by the swivel joint (20).

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