AT405124B

AT405124B - Chair

Info

Publication number: AT405124B
Application number: AT63097A
Authority: AT
Original assignee: Eckhard Hansen Dipl Ing
Priority date: 1997-04-14
Filing date: 1997-04-14
Publication date: 1999-05-25
Also published as: ATA63097A

Abstract

The chair has a seat board 5 and a backrest 6 which is connected to the said seat board for the purpose of common adjustment, has an upright section 7 and a lower arm 8 projecting laterally from the latter. The seat board 5 is connected, so that it can be pivoted about a pivoting bearing 18 located close to its front edge 14, to a load-bearing frame 3 which is fixed to a base 15. The lower arm 8 of the backrest 6, projecting below the seat board 5, is articulated on the load-bearing frame 3 such that it can pivot. It carries the rear part of the seat board 5. The load-bearing frame 3 is mounted on the base 15 such that it can rotate about a vertical axis 4. The articulation point 11 of the lower arm 8 of the backrest 6 on the load-bearing frame 3 is located close to this vertical axis 4. The pivoting bearing 18 is formed by a swinging lever 10 which can be pivoted in a vertical plane and whose one end is articulated on the seat board 5 and whose other end 19 is articulated on the load-bearing frame 3. One of the ends 9, 19 of the swinging lever 10 is adjustably mounted and can be fixed in each of the selected positions. A threaded or screwed spindle 20 is provided in order to adjust an end 9, 19 of the swinging lever 10. <IMAGE>

Description

       

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 aber voraussichtlich den Zugriff zur Gewindespindel 20 erschweren. In diesem Fall wäre einer motorisch betriebenen Verstellung der Vorzug einzuräumen. Anstelle einer Zugfeder 13 könnte auch eine Druckfeder vorgesehen werden, die einerseits am Ende 16 angelenkt ist und die andererseits am Schwinghebel 10 angreift. 



   Die Neigungsverstellung der Sitzplatte 5 umfasst in der Regel einen Winkelbereich von ca.   10'.   



  Ausgehend von der Horizontalen ist dabei die Sitzplatte 5 nach vorne in einem Winkelbereich von ca.   8'   verstellbar. Die Neigungsverstellung, ausgehend von der Horizontalen, nach hinten umfasst dann den Restbereich, also ca.   2'.   



   Dank der erfindungsgemässen Massnahme kann die Sitzplatte 5 bei aufrechter Lehne nach vorne geneigt sein, wobei das Ausmass dieser Neigung einstellbar ist, und zwar stufenlos. Die Einstellung kann aber auch so   gewählt   werden, dass bei aufrechter Lehne die Sitzplatte eine Neigung nach hinten aufweist. die jeweilige Neigung der Sitzplatte 5, sei es nach vorne oder nach hinten, ist abhängig von der jeweiligen Lage des verstellbaren Endes 19 des Schwinghebels 10 entlang seines Verstellweges. Beim gezeigten Ausführungsbeispiel liegt die Gewinde- oder Schraubenspindel 20 im wesentlichen horizontal.

   Für die hier beschriebene Verstellung können aber auch andere geeignete Getriebeglieder eingesetzt werden, beispielsweise ein Keilgetriebe oder ein Hebelgetriebe mit einer Kulissenführung.   ZweckmässIgerweise   werden solche Getnebeelemente eingesetzt werden, die bei geringem Bauvolumen eine Feineinstellung mit geringem Kraftaufwand ermöglichen. Wesentlich für die Verstellung des einen Endes des Schwinghebels 10 ist, dass durch sie die Neigung des Schwinghebels gegenüber der Horizontalen verändert wird und damit die Neigung der Sitzplatte   5,   die den erwähnten Winkelbereich umfasst, wobei die Verstellung so gewählt ist, dass die Sitzplatte 5 sowohl nach vorne wie auch nach hinten geneigt eingestellt werden kann. 



  

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 but is likely to complicate access to the threaded spindle 20. In this case, preference would be given to a motorized adjustment. Instead of a tension spring 13, a compression spring could also be provided, which is articulated on the one hand at the end 16 and which on the other hand acts on the rocker arm 10.



   The inclination adjustment of the seat plate 5 generally encompasses an angular range of approximately 10 '.



  Starting from the horizontal, the seat plate 5 can be adjusted forwards in an angular range of approximately 8 '. The inclination adjustment, starting from the horizontal, then covers the remaining area, i.e. approx. 2 '.



   Thanks to the measure according to the invention, the seat plate 5 can be inclined forward when the backrest is upright, the extent of this inclination being adjustable, and indeed steplessly. The setting can also be selected so that when the backrest is upright, the seat plate tilts backwards. the respective inclination of the seat plate 5, be it forwards or backwards, depends on the respective position of the adjustable end 19 of the rocker arm 10 along its adjustment path. In the embodiment shown, the threaded or screw spindle 20 is essentially horizontal.

   However, other suitable gear elements can also be used for the adjustment described here, for example a wedge gear or a lever gear with a link guide. Expediently, such tying elements are used which, with a small construction volume, enable fine adjustment with little effort. It is essential for the adjustment of one end of the rocker arm 10 that it changes the tilt of the rocker arm with respect to the horizontal and thus the tilt of the seat plate 5, which encompasses the angular range mentioned, the adjustment being selected such that the seat plate 5 is both can be tilted forward and backward.

Claims

1. Chair with a seat plate (5) and a backrest (6) with an upright section (7) and a lower arm (8) projecting therefrom for common adjustment, the seat plate (5) around a pivot bearing (18) lying near its front edge (14) is pivotably connected to a support frame (3) fixed to a base (15) and the lower arm (8) of the backrest (6) projecting under the seat plate (5) is pivotable on the support frame ( 3) is articulated and supports the rear part of the seat plate (5), the support frame (3) preferably being rotatably mounted on the base (15) about a vertical axis (4) and the articulation point (11) of the lower one Armes (8) of the backrest (6) on the support frame (3) close to this vertical axis (4), and that Swivel bearing (18) is formed from at least one rocking lever (10) pivotable in a vertical plane, one end of which is articulated on the seat plate (5) and the other end (19) of which is articulated on the support frame (3), characterized in that at least one of the ends (9, 19) of the rocker arm (10) is adjustable and can be fixed in any of the selected positions.

2. Chair according to claim 1, characterized in that for adjusting one end (9, 19) of the Swing lever (10) a threaded or screw spindle (20) is provided.

3. Chair according to claim 1 or 2, characterized in that a vertical plane containing the threaded or screw spindle (20) is parallel to the vertical axis (4) of the support frame (3) or contains it.

4. Chair according to claim 1, characterized in that the inclination adjustment of the seat plate (5) comprises an angular range of approximately 10 '.

5. Chair according to claim 4, characterized in that when the seat plate (5) is unloaded, regardless of the respective end position of the adjustable end (9, 19) of the rocker arm (10), the seat plate (5) has a forward inclination.

6. Chair according to claim 1, characterized in that the end (19) of the rocker arm (10) provided on the support frame (3) is adjustably mounted.

7. Chair according to one of claims 1 to 6, characterized in that the rocker arm (10) has a forward inclination regardless of the position of the seat plate (5) and backrest (6). <Desc / Clms Page number 3> 8. Chair according to claim 4, characterized in that the inclination adjustment of the forward-facing seat plate (5) has an angular range of approx.

8 # includes.