EP3205235B1 - Seating furniture with a recline stop - Google Patents

Description

The invention relates to a seating furniture with a backrest and a seat, the seat being operatively connected to the backrest, so that the backrest and the seat open each other with an opening angle when the backrest is pivoted, a backrest stop being provided which is designed to allow the relative movement of Limit seat and backrest.

Such a piece of furniture is for example from the WO 2013/083562 A1 known. The known seating furniture has a backrest and a seat. The seat is effectively connected to the backrest. The seating furniture has a connecting element that is in particular formed in one piece. The connecting element is connected to the backrest and the seat surface and is designed to resiliently counteract a pivoting movement of the backrest.

The connecting element is designed, the seat surface with a predetermined ratio to the pivoting movement of the backrest swivel so that the backrest and the seat surface open to each other with an opening angle when the backrest is swiveled. In the area of an end facing away from a turning section, a seat leg supports the spring deflection of the seat leg and the backrest leg during deflection - for example by occupying the seat with a person - against a tilting back stop which is formed against a spring element that supports against a base support - to limit.

The tilt back stop is arranged next to a vertical support of a pedestal. This creates unfavorable leverage.

From the US 2006/0097558 A1 an office chair with a synchronous mechanism is known.

The DE 37 24 605 A1 discloses a chair with adjustable, in the basic position pre-tensioned, seat surface or seat part surface inclination, wherein a rigid body can be pivoted between a position in which it locks the seat surface and another position in which it releases the movement of the seat surface is mounted.

From the DE 76 31 908 U1 an armchair is known which has a seat inclination adjustment device.

The object of the present invention is to develop a piece of seating furniture of the type mentioned at the outset in such a way that the lever ratios when limiting the opening movement of the seat surface to the backrest are improved.

This object is achieved according to the invention by a piece of seating furniture with the features of claim 1.

As a result of this measure, the tilt back stop is located centrally above a pedestal. Forces that act on the seat can thus be absorbed particularly well. The construction for the arrangement of the tilt back stop is simplified compared to the configuration according to FIG WO 2013/083562 A1 .

The tilt back stop can be used directly or indirectly, for. B. be connected to the vertical support of the pedestal via a base support. In addition, the other end of the tilt back stop can be connected directly or indirectly to the seat. For example, the reclining stop can be connected with its seat-side end to a seat leg of a seat leaf spring. The seat leg, in turn, can be connected to the seat and, if appropriate, to a base support.

According to a preferred embodiment, the tilting back stop can be blocked. If the tilt back stop is blocked, no relative movement from the seat to the vertical support of the pedestal is possible. However, this also means that no relative movement from the backrest to the seat is possible. By blocking the tilt back stop, the relative movement of the seat and backrest can also be blocked.

Further advantages result if the tilting back stop has a variable length section. Due to the variable length section, relative movements from the seat to the vertical support of the Pedestal allowed. This also enables a swivel movement between the backrest and seat.

The tilting back stop can have a stop shaft and a stop piston, with the stop shaft and stop piston being movable in the longitudinal direction relative to one another in a first relative rotational position and the stop shaft and stop piston not being movable in the longitudinal direction in a second relative rotational position. By rotating the stop shaft and stop piston relative to one another, the tilting back stop can thus be blocked in a simple manner. In particular, the stop piston can be guided with webs in recesses in the stop shaft. Due to a relative rotation of the stop shaft and stop piston, the webs of the stop piston can come to lie next to the recesses, so that there is no longer any mutual guidance and in particular no relative movement in the longitudinal direction is possible.

An actuation mechanism can be provided for blocking and unlocking the tilt back stop. In particular, the relative rotation of the stop shaft and stop piston can be effected via the actuation mechanism. The actuation mechanism can have a release button on the underside of the seat. This can be connected to the tilt back stop, for example, via a cable pull.

Further advantages result if the tilting back stop can be pivoted relative to the seat, in particular is connected to the seat via a spherical or hemispherical connecting element.

In particular, the tilting back stop can not only be pivotable along one direction relative to the seat, but rather be pivotable on all sides relative to the seat. This makes it possible to assume a large number of sitting positions. These sitting positions are not restricted or prevented by the reclining stop.

According to the invention, the tilting back stop is arranged to be pivotable relative to a pedestal. This results in a further degree of freedom and the reclining stop can follow movements of the seat.

The seat can be connected to a backrest leg via a seat bearing. The seat can thus be supported on a backrest leg. Because the connection is made via a seat bearing, however, relative movements of the seat and backrest leg are possible.

Particular advantages result if the seat bearing is designed as a spherical bearing. Thus, a large number of positions of the seat relative to a horizontal plane is possible.

Further features and advantages of the invention emerge from the following detailed description of an exemplary embodiment of the invention, with reference to the figures of the drawing, which shows details essential to the invention, and from the claims. The features shown there are not necessarily to be understood in terms of scale and are shown in such a way that the particularities according to the invention can be made clearly visible. The various features can each be implemented individually or collectively in any combination in the case of variants of the invention.

In the schematic drawing, exemplary embodiments of the invention are shown in various stages of use and explained in more detail in the following description.

Fig. 1

eine Seitenansicht eines erfindungsgemäßen Sitzmöbels mit einer ersten Relativstellung von Sitz und Rückenlehne;

Fig. 2

das erfindungsgemäße Sitzmöbel in einer Seitenansicht mit verschwenkter Rückenlehne und Sitz;

Fig. 3

einen Rückneigeanschlag in entriegelter Stellung;

Fig. 4

den Rückneigeanschlag in verriegelter bzw. blockierter Stellung;

Fig. 5

einen Betätigungsmechanismus;

Fig. 6

eine vergrößerte Schnittdarstellung des Rückneigeanschlags bei einer Ausgangsstellung des Sitzmöbels;

Fig. 7

eine der Fig. 6 entsprechende Darstellung für den Rückneigeanschlag bei verschwenkter Rückenlehne und Sitz;

Fig. 8

eine Schnittdarstellung durch den Sitz im Bereich des Rückneigeanschlags.

Show it:

Fig. 1

a side view of a chair according to the invention with a first relative position of the seat and backrest;

Fig. 2

the seating furniture according to the invention in a side view with pivoted backrest and seat;

Fig. 3

a tilt back stop in the unlocked position;

Fig. 4

the tilt back stop in locked or blocked position;

Fig. 5

an operating mechanism;

Fig. 6

an enlarged sectional view of the reclining stop in an initial position of the chair;

Fig. 7

one of the Fig. 6 corresponding representation for the backrest stop with the backrest and seat pivoted;

Fig. 8

a sectional view through the seat in the area of the reclining stop.

The Fig. 1 shows a seat 1 designed as an office chair with a seat 2 and a backrest 3. The seat 2 is on a flexible, in section in A substantially U-shaped seat support 4 is arranged, which is connected to a base support 5. The backrest 3 has a support structure 6 which has a flexible backrest leg 7 which is also connected to the base support 5. The seat 2 is connected to the support structure 6, that is to say the backrest 3, via a seat bearing 8. A tilt back stop 11 is arranged between the seat 2 and the vertical support 9 of a pedestal 10. In the position shown, the seat 2 and the backrest 3 have an initial position with respect to one another, which corresponds to an angle α1.

The Fig. 2 again shows the seating furniture 1, the backrest 3 and the seat 2 being pivoted here. As a result, the opening angle between the backrest 3 and the seat 2 has also increased and now corresponds to the angle α2. The tilting back stop 11, which is located in the extension of the vertical support 9, has been pivoted and compressed, ie the length has been shortened. In the in the Fig. 2 The position shown, the tilt back stop 11 is completely compressed, so that a further pivoting of both the seat 2 and the backrest 3 is no longer possible. The reclining stop 11 thus limits the movement of the backrest 3 and the seat 2.

A detailed representation of the tilt back stop 11 is in the Fig. 3 shown. The tilting back stop 11 comprises a stop piston 12 and a stop shaft 13. The stop piston 12 has webs 14 which, in the position shown, correspond to groove-like depressions or recesses 15 of the stop shaft 13. The stop piston 12 and stop shaft 13 can thus be moved relative to one another, the webs 14 being guided through the groove-like recesses 15.

At the upper end, the tilting back stop 11 has a hemispherical connecting piece 16, via which the tilting back stop 11 can be pivotably connected to the seat 2.

In the Fig. 3 the tilt back stop 11 is shown in an unlocked position. The Fig. 4 shows the blocked position. Compared to the position of Fig. 3 the stop piston 12 was rotated so far clockwise with respect to the stop shaft 13 that the webs 14 lie next to the groove-like depressions 15. The webs 14 are accordingly supported on the stop shaft 13. A relative movement in the longitudinal direction 20 of the stop piston 12 and the stop shaft 13 is therefore not possible.

Both the Fig. 3 as well as the Fig. 4 it can be seen that the tilting back stop 11 has a pivot axis 21 at its lower end, which enables the tilting back stop 11 to pivot relative to the pedestal 10.

The Fig. 5 shows an actuating mechanism 25 with an actuating button 26 which can be arranged on the seat 2, in particular its underside. A cable 27, in particular a release wire, leads from the actuation button 26 to a fastening tab 28 on the stop piston 12. By actuating the button 26, the stop piston 12 can thus be rotated relative to the stop shaft 13. A bearing plate 29 can also be seen, with which the tilting back stop 11 can be attached to the base support 5.

The Fig. 6 shows a sectional detailed representation of the chair 1 in the area of the tilt back stop 11. In the position shown, the tilt back stop 11 is unlocked, ie not blocked. This means that the stop piston 12 can be moved relative to the stop shaft 13, is movable downwards in particular in the embodiment shown. The tilting back stop 11 also has a stop axis 30, at the end of which the hemispherical connecting piece 16 is arranged. The connecting piece 16 is mounted in the seat 2. In the Fig. 6 The position shown corresponds to the starting position. If the seat 2 is now pivoted, the result is in the Fig. 7 situation shown. It can be seen here that the tilting back stop 11 has been pivoted about the axis 21. It can also be seen that the tilting back stop 11 has been compressed, ie the stop piston 12 has been moved into the stop shaft 13 and is in an end position there. A further compression or change in length in its longitudinal direction of the tilt back stop 11 is not possible. Thus, the backward leaning movement of both the seat 2 and the backrest 3 is limited. It can also be seen that the seat 2 relative to the reclining stop 11 in comparison to the position according to FIG Fig. 6 was pivoted. This is possible because the hemispherical connector 16 is provided.

The Fig. 8 shows a partial sectional view through the seat 2. Here it can be seen that the seat 2 can be pivoted laterally so that it assumes an angle β ≠ 90 ° to the vertical. This pivoting movement is possible on the one hand because the hemispherical connecting piece 16 is provided and thus the tilting back stop 11 does not hinder the movement. On the other hand, the movement is made possible in that the backrest leg 7 is connected via the seat bearing 8, which is designed as a spherical bearing, so that the seat 2 can execute the movement shown. A second seat bearing 8.1 connects a second backrest leg 7.1 to the seat 2.

Claims (8)

1. Piece of seating furniture (1) comprising a backrest (3) and a seat (2), the seat (2) being operatively connected to the backrest (3) such that the backrest (3) and the seat (2) open at an opening angle with respect to one another when the backrest (3) is pivoted, a reclining stop (11) being provided which is designed to limit the relative movement of the seat (2) and backrest (3), the reclining stop (11) being arranged in extension of the vertical support (9) of a base (10), characterized in that the reclining stop (11) is arranged so as to be pivotable relative to a base (10).
2. Piece of seating furniture according to claim 1, characterized in that the reclining stop (11) can be locked.
3. Piece of seating furniture according to either of the preceding claims, characterized in that the reclining stop (11) has a portion of adjustable length.
4. Piece of seating furniture according to any of the preceding claims, characterized in that the reclining stop (11) has a stop shaft (13) and a stop piston (12), the stop shaft (13) and the stop piston (12) being movable relative to one another in the longitudinal direction in a first relative rotational position, and the stop shaft (13) and the stop piston (12) not being movable relative to one another in the longitudinal direction in a second relative rotational position.
5. Piece of seating furniture according to any of the preceding claims, characterized in that an actuating mechanism (25) is provided for locking and unlocking the reclining stop (11).
6. Piece of seating furniture according to any of the preceding claims, characterized in that the reclining stop (11) is pivotable relative to the seat (2), in particular is connected to the seat (2) via a spherical or hemispherical connecting element (16).
7. Piece of seating furniture according to any of the preceding claims, characterized in that the seat (2) is connected to a backrest limb (7) via a seat bearing (8).
8. Piece of seating furniture according to claim 7, characterized in that the seat bearing (8) is designed as a spherical bearing.

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