EP3108768B1 - Chair with a support element pivotable around both its longitudinal and transversal axis - Google Patents

Description

The invention relates to a chair with a chair column and one both its longitudinal and its transverse axis, i. forward and backward as well as to the side, against the restoring force of at least one elastically deformable element pivotable, mounted on a coupling element seat element.

Such chairs are described inter alia in the EP 2 486 826 B1 , of the EP 1 584 266 B1 and the DE 102 45 774 A1 ,

• das Stützelement zwei entlang einer ersten Achse ausgerichtete Achszapfen und zwei weitere Achszapfen enthält, die entlang einer die erste Achse rechtwinklig schneidenden zweiten Achse ausgerichtet sind,
• das Stützelement und die Achszapfen verschwenkbar in zwei sich gegenüberliegenden Halbschalen, die jeweils halbkugelförmig gestaltete Innenflächen aufweisen, gelagert ist, und
• die Achszapfen unter Zwischenschaltung von elastischen Elementen als Achslager in den beiden Halbschalen gelagert sind.

In these known chairs elastic elements between stored in the rest position of the chair substantially horizontally oriented support plates. The well-known Chairs are relatively complicated in terms of design as well as in the assembly of the coupling element. The US 1 358 640 A1 discloses a chair, wherein the coupling element comprises a support member having an outer surface with spherically shaped portions. The invention has for its object to provide a contrast structurally simpler chair, the assembly is simplified compared to the known chairs. To solve this problem, the chair according to the invention is characterized in that

• the supporting element comprises two axle journals aligned along a first axis and two further axle journals which are aligned along a second axis which intersects the first axis at right angles,
• the support member and the axle pivotally in two opposite half-shells, each having hemispherically shaped inner surfaces, is mounted, and
• the journals are mounted with the interposition of elastic elements as axle bearings in the two half-shells.

Preferred embodiments of the invention are dealt with in the subclaims.

The consisting of two half-shells coupling element consisting of two half-shells forming a unit and the particular spherical support elements mounted between them, can be mounted in a particularly simple manner between the chair column and the seat element or a seat element substructure, if the two half-shells one unit forming with enclosed therein support element rigidly secured together or connected to each other.

• Figur 1 zeigt in vereinfachter schematisierter Darstellung die Vorderansicht eines Stuhles;
• die Figuren 2 und 3 zeigen den in Figur 1 dargestellten Stuhlaufbau in seitlich verschwenkten Positionen;
• Figur 4 zeigt als Explosionszeichnung in schematisierter perspektivischer Darstellung das erfindungsgemäß verwendete Kopplungselement;
• Figur 5 zeigt einen Stuhl in unbelastetem Zustand;
• Figur 6 zeigt den in Figur 5 dargestellten Stuhl in einer nach vorne verschwenkten Position des Sitzelementes.

The invention will be described in more detail below with reference to the drawing:

• FIG. 1 shows a simplified schematic representation of the front view of a chair;
• the FIGS. 2 and 3 show the in FIG. 1 illustrated chair structure in laterally pivoted positions;
• FIG. 4 shows an exploded view in a schematic perspective view of the coupling element used in the invention;
• FIG. 5 shows a chair in unloaded condition;
• FIG. 6 shows the in FIG. 5 shown chair in a forward pivoted position of the seat element.

In the figures, the seat element 1, the backrest 1 'and the chair column 9 with the seat element 1 connecting coupling element 2 are shown in a simplified, schematic representation.

• eine untere Halbschale 6,
• eine obere Halbschale 7 sowie als Stützelement
• eine zwischen den beiden Halbschalen 6 und 7 gelagerte Kugel 3 mit
• entlang einer ersten X-Achse ausgerichteten Achszapfen 4 sowie
• zwei weitere Achszapfen 5, die entlang der Y-Achse ausgerichtet ist, die zur X-Achse der beiden Achszapfen 4 senkrecht ausgerichtet ist, sowie
• in die Halbschalen 6 und 7 eingesetzte elastische Elemente 8 bzw. 8', die Achslager für die Achszapfen 4 und 5 bilden.

The coupling element 2 contains in the in particular in FIG. 4 shown way the following individual elements

• a lower half-shell 6,
• an upper half-shell 7 and as a support element
• a mounted between the two shells 6 and 7 ball 3 with
• along a first X-axis aligned stub axle 4 and
• two further journals 5, which is aligned along the Y-axis, which is aligned perpendicular to the X-axis of the two stub axles 4, as well as
• in the half shells 6 and 7 used elastic elements 8 and 8 ', the axle bearings for the stub axle 4 and 5 form.

In FIG. 4 the chair column 9 is shown in dashed lines, which carries a conventional gas spring 10 at its upper end. The chair column 6 is inserted with the gas pressure spring 6 'in an axially aligned opening of the ball 3.

The ball 3 with its journal 4 is rigidly connected to the chair column 9 and the gas spring 10. In a weight shift of a person sitting on the seat member, the two unit forming half-shells 6 and 7 are pivoted to the elastic elements 8 and 8 'about the stub axle 4 and / or the axle journals 5, in each case against the restoring force of the elastic, preferably from an elastomeric material consisting of elements 8 and 8 'in the in the FIGS. 2 and 3 and 6 illustrated positions adjusted in which the seat 1 are pivoted relative to the chair column 9.

The spherical support member 3 shown in the drawings may also be divided into individual ball sections, wherein the alignment and attachment of the stub axle 4 and 5 in the in FIG. 4 way shown remains unchanged.

Between the upper half shell 7 and the seat element 1, a so-called synchronizing mechanism unit for simultaneous displacement of the seat element in a substantially horizontal direction in dependence on the pivotal movement of the seat back 1 'may be mounted, which is coupled to the seat element 1 and the synchronizing mechanism unit.

Claims (6)

1. Chair containing a chair post (9) and a seat element, which is mounted on a coupling member (2) and which is rotatable around its longitudinal axis and its transverse axis i.e. towards ahead and towards back and also sidewards, against the restoring force of at least one elastically deformable element, wherein

   - the coupling element (2) is a supporting element (3) with an outer surface having spherically formed sections

   characterized in that

   - the supporting element (3) contains two axle trunnions (4) aligned to a first axle (X) and two further axle trunnions (5) which are aligned to a second axle (Y) which intersects the first axle rectangularly

   - the supporting element (3) and the axle trunnions (3, 4) are rotatably mounted in two opposed half shells (6, 7), which are provided with hemispherical inner surfaces, and

   - the axle trunnions (5, 6) are mounted in the two half shells (6, 7) by means of elastic elements (8 or 8', respectively), forming axle bearings.
2. Chair according to claim 1, characterized in that the supporting element is shaped in the form of a sphere (3) which is provided with an axially aligned opening for inserting the upper end of the chair post (9), and in that the two half shells (6, 7) form a spherical hollow space within which the sphere (3) is housed such, that the two half shells (6, 7) are rotatable relative to the sphere (3) around the axles (5 or 6, relatively).
3. Chair according to claim 2, characterized in that the chair post (6) is provided at its upper end with a gas pressure spring (10) which is insertable into the axial opening of the sphere (3).
4. Chair according to one of the claims 1 to 3, characterized in that the two half shells (6, 7) are fastened against each other forming a unit.
5. Chair according to one of the claims 2 to 4, characterized in that the elastic elements (8 or 8', relatively) consist of an elastomer.
6. Chair according to one of the claims 1 to 5, characterized in that between the upper half shell (7) and the seat element (1) a synchronised mechanism unit for displacing the seat element essentially in the horizontal direction dependent on the rotational movement of a seat back, which is coupled with the seat element (1) and the synchronized mechanism unit.

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