EP3102069B1 - Chair - Google Patents

Chair Download PDF

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Publication number
EP3102069B1
EP3102069B1 EP15797103.7A EP15797103A EP3102069B1 EP 3102069 B1 EP3102069 B1 EP 3102069B1 EP 15797103 A EP15797103 A EP 15797103A EP 3102069 B1 EP3102069 B1 EP 3102069B1
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EP
European Patent Office
Prior art keywords
chair
seat plate
backrest
seat
seat section
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EP15797103.7A
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German (de)
French (fr)
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EP3102069A1 (en
Inventor
Simon Desanta
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Individual
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Individual
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Priority to PL15797103T priority Critical patent/PL3102069T3/en
Publication of EP3102069A1 publication Critical patent/EP3102069A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/04—Stackable chairs; Nesting chairs
    • A47C3/045—Stackable chairs; Nesting chairs with tipping-up seats
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/04—Stackable chairs; Nesting chairs

Definitions

  • the present invention relates to a chair having a seat panel, a base frame supporting the seat panel, and a seat back.
  • US 4,765,679 A discloses a chair with a split seat panel, the rear part of which is motion coupled to the back of the chair.
  • DE 196 07 136 A1 discloses a chair having a seat panel and a common adjustment associated therewith, an upright portion and a protruding lower arm having backrest.
  • the seat plate is pivotally connected near its front edge via a pivot bearing with a support frame fixed to a pedestal.
  • the protruding under the seat plate lower arm of the backrest is pivotally hinged to the support frame and carries the back part of the seat plate.
  • Chairs are known to exist in extremely diverse embodiments.
  • the backrest is rigidly attached to the seat plate, which in turn is supported by a base with four legs.
  • Chairs used for seating halls and function rooms often have side panels that can be laterally connected to a neighboring chair.
  • such row chairs are conveniently stackable, so that they can be stored to save space.
  • Such a row chair is for example off WO 2008/064886 known.
  • the chair To improve seating comfort and ergonomics, it is desirable for the chair to be able to accommodate, to some extent, the load of the person sitting thereon. So the backrest should give way under load, but at the same time provide sufficient support for the occupant. Also, the seat plate can be designed resilient and coupled to the backrest so that adjusts a balance of power, which changes dynamically when changing the body position.
  • Such chairs usually have a comparatively simple spring technology, in which the spring pressure is designed for comparatively heavy or tall people. Lighter persons can therefore hardly use the movement mechanism of the chair and the associated comfort.
  • the known stackable row chairs from the unloaded position, which corresponds to the stacking position, while bringing into a relaxation position in which the backrest is tilted slightly backwards.
  • For long periods of sitting however, such mobility is advantageous and increased the ergonomics.
  • Corresponding solutions are mechanically too expensive and costly for row chairs and are therefore previously used only in office chairs or work chairs. The constructions used in this case, however, are relatively complex and expensive and therefore can not be easily transferred to row chairs.
  • this chair should be equally comfortable and comfortable for people of different body weight and also provide a supported front seating position of the type described above.
  • the backrest is pivotally mounted on the base frame, so that it can yield under load from the back of the person sitting.
  • a support member in the direction of the seat plate, which is at least partially formed elastically deformable.
  • the support member is rigid and rigidly connected to the backrest, so that it can follow their pivotal movement about the rear mounted on the undercarriage transverse axis. If the backrest is thus pivoted backwards, the support part follows this pivoting movement upwards or correspondingly downwards, when the backrest is pushed forward.
  • the support member reinforces the seat plate such that during a pivoting movement of the backrest, as described above, a located before the end of the support portion of the seat panel is raised or lowered, depending on the pivoting direction. That is, the backrest is coupled via the support member so with the seat plate that the loaded by a person sitting thereon part of the seat plate can be raised or lowered.
  • the mechanism according to the invention offers the user a relaxed reclined position, but also an advanced seating position with the backrest pushed forward.
  • the ergonomic advantages of this chair are essentially independent of the weight of the user usable.
  • the mechanism of the chair according to the invention is relatively simple and can therefore be installed inexpensively in chairs that are used in large numbers, especially in row chairs for hall seating. Another advantage is that the construction according to the invention can be installed in substructures due to their simplicity, which are preferably suitable for row chairs, so are laterally connected to adjacent chairs and stackable.
  • the support member reinforces a rear portion of the seat plate or is integrally formed therewith. This means that the support part stiffens the rear area of the seat plate in sections, so that it is no longer flexible, but can follow the pivoting movement of the backrest.
  • the support member each reinforces one of the two rear corner portions of the seat panel, and a middle rear portion of the seat panel located between these corner portions is separated from the corner portions by slits extending into the seat panel from the seat back.
  • the corner regions are stiffened, while the region lying in between can have a certain mobility and flexibility due to its flexibility.
  • the front end of the seat plate is firmly connected to the base frame.
  • the front end of the seat plate rests freely on the front end of the underframe.
  • the seat plate is elastically deformable. It thus tends to return to its original shape when a force acting on it, ie by a weight load or a force that acts on the support plate on the seat plate. The elasticity thus acts as a restoring moment.
  • the chair according to the invention is stackable on an identical chair.
  • the in Fig. 1 illustrated chair 100 includes a base 102, a seat plate 104 and a backrest 106.
  • the seat plate 104 is oriented substantially horizontally, while the backrest 106 is slightly inclined backwards.
  • the terms "front”, “rear”, “side”, etc. refer to the perspective of a person sitting on the chair 100. That is, the backrest 106 is located at the rear of the back of the chair 100, and all other positions and spatial directions refer to it.
  • the backrest 106 is slightly inclined backwards relative to the vertical position and encloses an angle of a little more than 90 degrees with the seat plate 104.
  • Fig. 1 shown position represents a rest position of the chair 100 in the unloaded state, from which various parts of the chair 100 in the positions in the Fig. 2 and 3 are movable, as will be explained in more detail below.
  • the base 102 includes four chair legs in a conventional manner, of which in Fig. 1 only the right rear chair leg 108 and the right front chair leg 110 can be seen.
  • the chair legs 108, 110 are each connected on one side of the chair 100, ie on its right and left sides by a substantially horizontal strut 112.
  • the strut 112 has a slight bend, so that it comprises a rear part 114 which is slightly inclined upwards towards the backrest 106, and a front part 116, which is inclined slightly upwards to the front end of the chair 100.
  • the chair legs 108, 110, together with the substantially horizontal strut 112 form an assembly that is substantially in the shape of an inverted letter "U".
  • a bearing 118 for a horizontal transverse axis 120 is disposed in the upper rear corner of this arrangement, in which the upper end of the right rear chair leg 108 coincides with the rear end of the strut 112, a bearing 118 for a horizontal transverse axis 120 is disposed.
  • This transverse axis 120 is directed across the chair 100 and on the in Fig. 1 invisible left side of the chair held in a comparable warehouse.
  • the backrest 106 is pivotable, so that its inclination is variable.
  • a pair of support members 122 extending in the direction of the seat plate 104. Specifically, from each rear corner of the chair 100, a support member 122 extends forward and reinforces the respective rear corner portion of the seat panel and stiffen it. For example, the support member 122 may rest against the seat surface 104 over its entire length from below and be secured thereto. However, it is also conceivable that the support member 122 is formed or formed integrally with the seat plate 104 in this corner region.
  • the seat panel 104 may be made of an elastically deformable material, the respective support members 122 are rigid. In the reinforced or supported rear corner regions, the seat plate 104 is thus no longer elastic. On the other hand, a middle region of the seat plate 104 lying between the corner regions may have a certain elasticity and for this purpose be separated from the reinforced and stiffened corner regions, for instance through slots extending into the seat plate 104 from the backrest 106.
  • the support member 122 is rigidly coupled to the seat back 106 and follows its pivotal movement about the transverse axis 120, as shown below. As a result, an area of the seat plate 104 located in front of the front end of the support part 122 is raised or lowered, depending on the pivoting direction of the backrest 106.
  • Fig. 2 For example, it is shown how the backrest 106 is pivoted to the rear. This situation may occur, for example, when a person sitting on the chair 100 leans back and thus a pressure force is exerted backwards on the backrest 106. That of this pivoting movement (in Fig. 2 counterclockwise) following support member 122 exerts from below a pressure against the seat plate 104, which causes an approximately central portion of the seat plate 104, which is located at a distance from the backrest 106, is slightly raised. Since the front end of the seat plate 104 is fixedly connected to the base 102 in the present embodiment, the flexible seat plate 104 is deformed, ie, arched upward, against the weight of the user sitting on the chair 100.
  • the seat plate 104 strives to return to its original shape Fig. 1 (ie, down), and due to the rigid coupling between the support member 122 and the backrest 106, the backrest 106 is pressed forward against the back of the user.
  • the front end of the seat plate 104 does not necessarily have to be firmly fixed to the base 102. Rather, the front end of the seat plate 104 can also rest freely on the base frame 102 and be held on the front upper edge of the base frame 102 solely by the weight of the user, who is exercised in particular by his resting on the front end of the seat plate 104 thigh.
  • the in Fig. 3 achieved position shown in which the seat plate 104 is curved from its rest position slightly downwards, so compared in the opposite direction With Fig. 2 .
  • This position can be achieved when the user of the chair 100 leans forward slightly.
  • the seat plate 104 yields slightly downward due to its elasticity.
  • the seat plate 104 may be secured to the base 102 so that in this movement in the position in Fig. 3 a stop is reached, in which the left and right side edges of the seat plate 104 rest on the horizontal strut 112 of the undercarriage 102, so that a further deflection in the downward direction is no longer possible.
  • Seat plate 104 and backrest 106 can be returned to the position in FIG Fig. 1 move, for example, when the user stands up and thus relieves the weight on the seat plate 104. Then, due to its elasticity, the seat plate 104 strives to return to the horizontal position, and the restoring force acting in this case is transmitted via the support part 122 to the backrest 106 rigidly coupled thereto.
  • the inventive effect of creating a dynamic equilibrium position of the seated person is essentially achieved by the support member 122, which is fixedly coupled to the backrest 106, during a pivotal movement of the backrest 106, the seat plate 104 pushes upward or downward movement of the same permits and Thus, this area or a front of the end of the support member 122 located portion of the seat plate 104 is raised or lowered.
  • the seat plate 104 may be elastically deformable in itself, for example by selecting a suitable flexurally elastic material, or may be divided by a hinge, such as a film hinge in a front and a rear portion which are slightly pivoted against each other. There are thus various embodiments conceivable to ensure the deformability of the seat plate 104.
  • the support member 122 is formed by a rear reinforced portion of the seat plate 104, that is, it is not a separate part, but the seat plate 104 itself is at a rear, the backrest 106 facing portion rigid and there itself is rigidly and flexurally formed at a rear portion facing the seat back 106, while a portion 104 thereof is elastic or separated from this rear rigid portion by a living hinge or the like.
  • the chair 100 according to the first embodiment may be formed as a stackable chair or further developed to such.
  • details in the Fig. 1 to 3 unless they oppose such stackability, are not to be understood as limiting the present invention.
  • the mechanism according to the invention is not exclusively tied to stackable chairs, but can also be applied to other frame substructures, for example on office chairs with a turnstile frame.
  • FIGS. 4 to 15 an embodiment of the chair 10 is shown, which does not correspond to the present invention.
  • chair 10 includes the chair 10 according to the present, not according to the invention embodiment, a base 12, a seat plate 14 and a backrest 16.
  • the seat plate 14 is substantially horizontal and only slightly to the rear, ie sloping back to the backrest 16 arranged on the base 12.
  • the backrest 16 is inclined slightly backwards relative to the vertical position and encloses an angle of a little more than 90 degrees with the seat plate 14.
  • Fig. 4 shown position represents a rest position of the chair 10 in the unloaded state, from which various parts of the chair 10 are movable to other positions, as will be explained in more detail below.
  • the base 12 comprises in a conventional manner four chair legs, of which in Fig. 4 only the right rear chair leg 18 and the right front chair leg 20 can be seen.
  • the chair legs 18, 20 are each on one side of the chair 10, ie on its right and left sides by a substantially horizontal and forward slightly sloping strut 22 connected.
  • the right-hand chair legs 18, 20 together with the right-hand strut 22 thus form an arrangement which essentially has the shape of an inverted letter "U".
  • a bearing 24 for a horizontal transverse axis 26 is arranged at the upper rear corner of this arrangement.
  • This transverse axis 26 is directed across the chair 10 and on the in Fig. 4 invisible left side of the chair held in a comparable camp.
  • the backrest 16 is pivotable so that its inclination is variable.
  • levers extend, which extend from under the seat plate 14 from behind. These levers form in the present embodiment of the chair 10, the support member for supporting the seat plate 14.
  • the lever 28 (as well as its counterpart on the opposite side of the chair 10) may for example be fixedly attached to the transverse axis 26, which rotates together with the backrest 16 within the bearings 24. The lever 28 thus follows the pivoting movement of the backrest 16. If the backrest 16 is tilted backwards, the front end of the lever 28 lifts and exerts a pressure against the seat plate 14 from below.
  • the seat plate 14 is divided transversely substantially into two parts, namely a longer front part 30 and a shorter rear part 32.
  • the front part 30 is connected to the rear part 32 by a living hinge 34, the hinge axis approximately in the top, ie lies in the actual seat of the seat plate 14.
  • the two parts 30, 32 of the seat plate 14 are thus flexibly connected to each other, so that the rear part 32 can exert a slight pivoting movement relative to the front part 30.
  • the seat plate 14 is thus deformable in itself.
  • the rear end 36 of the front part 30 of the seat plate 14 is connected at the bottom of the seat plate 14 via a hinge 38 with the end of the lever 28.
  • the hinge axis of this hinge 38 is horizontal and parallel to the rear transverse axis 26.
  • the front end 40 of the front part 30 of the seat plate 14 is connected to the base 12 by a pivot bearing 42, which allows the front part 30 of the seat plate 14 in Up and down direction relative to the base frame 12 is pivotable, so that the rear end of this front part 30 can raise or lower.
  • this pivot bearing 42 includes a pivot axis 44 which rests with play in the forward and backward direction in a bearing sleeve 46 which is formed integrally on the underside of the front end 40 of the front part 30 of the seat plate 14. This game allows in addition to the pivotability of the front part 30 of the seat plate 14 in the upward and downward direction so a slight displacement of the front part 30 in the forward and backward direction.
  • the pivot axis 44 is horizontal in the transverse direction of the chair, so parallel to the rear transverse axis 26, and is held by a pair of center struts 48, which are an integral part of the base 12 and run centrally below the seat plate 14, starting from the rear transverse axis 26 forward. They are located at an in Fig. 4 invisible front cross strut 60 (see Fig. 14 ) of the undercarriage 12, which extends between the upper ends of the front chair legs 20, and have in the region of the joint 38 a slight bend, from which starting the longer front ends of the center struts 48 and the shorter rear ends are inclined upwards. At their rear ends, the center struts 48 are pivotally connected to the rear transverse axis 26.
  • the rear part 32 of the seat plate 14 rests with its rear end 50 on the rear transverse axis 26 and is thus supported by this.
  • the seat plate 14 is thus substantially divided into two parts, namely in the front part 30 and the rear part 32, which are flexibly connected by the film hinge 34, so that they are mutually movable.
  • This inwardly movable seat plate 14 is supported from its underside by the lever 28 which extends solidly from the backrest 16, so that a movement of the backrest 16 on the rear transverse axis 26, the lever 28 and the hinge 38 transmitted to the seat plate 14 becomes. This mechanism will be explained in more detail below.
  • FIG. 6 Such a raised position on the rest position Fig. 4 addition is in Fig. 6 shown.
  • the position of the front portion 30 of the seat panel 14 is further approximated to the horizontal position, while the rear portion 32 of the seat panel 14 drops further downwardly and rearwardly from the axis of the film hinge 34.
  • the front part 30 and the rear part 32 of the seat plate 14 in the rest position in Fig. 4 Almost aligned with each other, that are approximately in one plane, the two parts are 30,32 in the extreme positions in the Fig. 5 and 6 kinked in different directions against each other.
  • the rear end 50 of the rear part 32 is always in the different positions on the rear transverse axis 26 and is supported by this.
  • the chair 10 includes a return member 52 within the pivot bearing 42 with two springs 54,56 which are in the bearing sleeve 46 between the sleeve wall 58 and the pivot axis 44 opposite eino, as in Fig. 10 is shown schematically.
  • the pivot axis 44 in the in Fig. 10 shown rest position pressed. While the front part 30 of the seat plate 14 in the 4 to 6 7 to 9, this part 30 is simultaneously displaced back and forth with respect to the pivot axis 44.
  • the pivot axis 44 in the loaded position of the chair 10 in Fig. 5 moved forward within the pivot bearing 42, or the bearing sleeve 46 is moved relative to the fixedly positioned pivot axis 44 to the rear, so that the spring 56 in Fig. 10 is compressed.
  • the spring 56 pushes the front side of the sleeve wall 58 of the bearing sleeve 46 forward, so that the pivot axis 44 in this respect is moved to the rear and again the rest position according to Fig. 10 or.
  • Fig. 4 or Fig. 7 is taken.
  • the positions from the Fig. 5 and 6 8 and 9 thus represent maximum feed positions and retraction positions of the pivot axis 44 with respect to the bearing sleeve 46, between which the position according to Fig. 4 . 7 and 10 represents an intermediate position.
  • the present embodiment of the chair 10 allows stacking of a plurality of identical chairs 10 on each other, as in FIG Fig. 13 shown. This is possible due to the very simple mechanism of the chair 10, by which the base 12 can be easily constructed. It is also possible to provide on the horizontal lateral struts 22 connecting means for the respective connection of a chair 10 with a left or right adjacent chair 10. Such stacking is also possible with the chair 100 of the first embodiment.
  • the mechanism described above with the features of the seat plate 14 and the backrest 16 and their coupling means can be manufactured relatively inexpensively and is thus suitable for use in chairs that are commonly used in large quantities, for example, for seating event space.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)

Description

Die vorliegende Erfindung betrifft einen Stuhl mit einer Sitzplatte, einem Untergestell, das die Sitzplatte trägt, und einer Rückenlehne.The present invention relates to a chair having a seat panel, a base frame supporting the seat panel, and a seat back.

US 4,765,679 A offenbart einen Stuhl mit einer geteilten Sitzplatte, deren hinterer Teil mit der Rückenlehne des Stuhls bewegungsgekoppelt ist. US 4,765,679 A discloses a chair with a split seat panel, the rear part of which is motion coupled to the back of the chair.

DE 196 07 136 A1 offenbart einen Stuhl mit einer Sitzplatte und einer zur gemeinsamen Verstellung damit verbundenen, einen aufrechten Abschnitt und einen davon abstehenden unteren Arm aufweisenden Rückenlehne. Die Sitzplatte ist nahe ihrer Vorderkante über ein Schwenklager schwenkbar mit einem an einem Sockel festgelegten Tragrahmen verbunden. Der unter die Sitzplatte ragende untere Arm der Rückenlehne ist schwenkbar am Tragrahmen angelenkt und trägt den rückseitigen Teil der Sitzplatte. DE 196 07 136 A1 discloses a chair having a seat panel and a common adjustment associated therewith, an upright portion and a protruding lower arm having backrest. The seat plate is pivotally connected near its front edge via a pivot bearing with a support frame fixed to a pedestal. The protruding under the seat plate lower arm of the backrest is pivotally hinged to the support frame and carries the back part of the seat plate.

DE 87 13 972 U1 offenbart einen Stuhl mit einer in ihrer Neigung verstellbaren Rückenlehne und einer in Abhängigkeit von der Rückenlehnenneigung sich verändernden Lage einer Sitzfläche, wobei die Bewegung mittels um Gelenkpunkte drehbaren Hebelarmen übertragen wird. DE 87 13 972 U1 discloses a chair having a reclining backrest and a varying position of a seat depending on the backrest inclination, the movement being transmitted by means of lever arms rotatable about pivot points.

Stühle gibt es bekanntlich in äußerst vielfältigen Ausführungsformen. In ihrer einfachsten Ausführungsform ist die Rückenlehne starr an der Sitzplatte angebracht, die wiederum von einem Untergestell mit vier Beinen getragen wird. Stühle, die zur Bestuhlung von Hallen und Veranstaltungsräumen verwendet werden, haben häufig Seitenteile, die sich seitlich mit einem benachbarten Stuhl verbinden lassen. Zudem sind solche Reihenstühle zweckmäßigerweise stapelbar, so dass sie Platz sparend gelagert werden können. Ein solcher Reihenstuhl ist beispielsweise aus WO 2008/064886 bekannt.Chairs are known to exist in extremely diverse embodiments. In its simplest embodiment, the backrest is rigidly attached to the seat plate, which in turn is supported by a base with four legs. Chairs used for seating halls and function rooms often have side panels that can be laterally connected to a neighboring chair. In addition, such row chairs are conveniently stackable, so that they can be stored to save space. Such a row chair is for example off WO 2008/064886 known.

Zur Verbesserung des Sitzkomforts und der Ergonomie ist es wünschenswert, dass der Stuhl sich in gewissem Umfang an die Last der darauf sitzenden Person anpassen kann. So soll die Rückenlehne bei Belastung etwas nachgeben, dem Sitzenden jedoch gleichzeitig ausreichenden Halt bieten. Auch die Sitzplatte kann federnd nachgiebig gestaltet und mit der Rückenlehne derart gekoppelt sein, dass sich ein Kräftegleichgewicht einstellt, welches sich bei Veränderung der Körperposition dynamisch verändert.To improve seating comfort and ergonomics, it is desirable for the chair to be able to accommodate, to some extent, the load of the person sitting thereon. So the backrest should give way under load, but at the same time provide sufficient support for the occupant. Also, the seat plate can be designed resilient and coupled to the backrest so that adjusts a balance of power, which changes dynamically when changing the body position.

Derartige Stühle weisen in der Regel eine vergleichsweise einfache Federtechnik auf, bei welcher der Federdruck auf vergleichsweise schwere bzw. große Personen ausgelegt ist. Leichtere Personen können daher den Bewegungsmechanismus des Stuhls und den damit verbundenen Komfort kaum nutzen. Darüber hinaus lassen sich die bekannten stapelbaren Reihenstühle aus der unbelasteten Position, die der Stapelposition entspricht, zwar in eine Entspannungsposition bringen, in der die Rückenlehne etwas nach hinten gekippt ist. Sie lassen sich jedoch nicht in eine gestützte vordere Sitzposition bringen, in der die Rückenlehne aus der unbelasteten Position nach vorn geschwenkt ist und die auf dem Stuhl sitzende Person auch in einer nach vorn geschobenen Sitzposition abstützt. Für langes Sitzen ist eine solche Beweglichkeit jedoch vorteilhaft und erhöht die Ergonomie. Entsprechende Lösungen sind für Reihenstühle jedoch mechanisch zu aufwendig und kostspielig und werden daher bisher nur bei Bürostühlen oder Arbeitsdrehstühlen eingesetzt. Die hierbei verwendeten Konstruktionen sind jedoch relativ komplex und kostspielig und lassen sich daher nicht ohne weiteres auf Reihenstühle übertragen.Such chairs usually have a comparatively simple spring technology, in which the spring pressure is designed for comparatively heavy or tall people. Lighter persons can therefore hardly use the movement mechanism of the chair and the associated comfort. In addition, the known stackable row chairs from the unloaded position, which corresponds to the stacking position, while bringing into a relaxation position in which the backrest is tilted slightly backwards. However, you can not bring in a supported front seating position in which the backrest is pivoted forward from the unloaded position and the person sitting on the chair also supported in a forward pushed seating position. For long periods of sitting, however, such mobility is advantageous and increased the ergonomics. Corresponding solutions, however, are mechanically too expensive and costly for row chairs and are therefore previously used only in office chairs or work chairs. The constructions used in this case, however, are relatively complex and expensive and therefore can not be easily transferred to row chairs.

Es ist daher eine Aufgabe der vorliegenden Erfindung, einen Stuhl zu entwickeln, der trotz vergleichsweise einfacher und preiswerter Gestaltung ein hohes Maß an Ergonomie und Komfort bietet und sich insbesondere als Reihenstuhl oder für vergleichbare Zwecke eignet. Insbesondere soll dieser Stuhl für Personen unterschiedlichen Körpergewichts gleichermaßen bequem und komfortabel nutzbar sein und auch eine gestützte vordere Sitzposition der vorstehend beschriebenen Art bieten.It is therefore an object of the present invention to develop a chair which despite a comparatively simple and inexpensive design offers a high degree of ergonomics and comfort and is particularly suitable as a row chair or for comparable purposes. In particular, this chair should be equally comfortable and comfortable for people of different body weight and also provide a supported front seating position of the type described above.

Diese Aufgabe wird erfindungsgemäß durch einen Stuhl mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a chair with the features of claim 1.

Bei dem erfindungsgemäßen Stuhl ist die Rückenlehne schwenkbar am Untergestell gelagert, so dass sie bei einer Belastung durch den Rücken des Sitzenden nachgeben kann. Vom unteren Ende der Rückenlehne aus erstreckt sich ein Stützteil in Richtung der Sitzplatte, die zumindest teilweise elastisch verformbar ausgebildet ist. Das Stützteil ist hingegen steif und starr mit der Rückenlehne verbunden, so dass es deren Schwenkbewegung um die hinten am Untergestell angebrachte Querachse folgen kann. Wird die Rückenlehne somit nach hinten geschwenkt, folgt das Stützteil dieser Schwenkbewegung nach oben bzw. entsprechend nach unten, wenn die Rückenlehne nach vorn gedrückt wird.In the chair according to the invention, the backrest is pivotally mounted on the base frame, so that it can yield under load from the back of the person sitting. From the lower end of the backrest extends a support member in the direction of the seat plate, which is at least partially formed elastically deformable. The support member, however, is rigid and rigidly connected to the backrest, so that it can follow their pivotal movement about the rear mounted on the undercarriage transverse axis. If the backrest is thus pivoted backwards, the support part follows this pivoting movement upwards or correspondingly downwards, when the backrest is pushed forward.

Das Stützteil verstärkt die Sitzplatte derart, dass bei einer Schwenkbewegung der Rückenlehne, wie vorstehend beschrieben, ein vor dem Ende des Stützteils gelegener Bereich der Sitzplatte angehoben oder abgesenkt wird, je nach Schwenkrichtung. Das heißt, dass die Rückenlehne über das Stützteil derart mit der Sitzplatte gekoppelt ist, dass der durch eine darauf sitzende Person belastete Teil der Sitzplatte angehoben oder abgesenkt werden kann.The support member reinforces the seat plate such that during a pivoting movement of the backrest, as described above, a located before the end of the support portion of the seat panel is raised or lowered, depending on the pivoting direction. That is, the backrest is coupled via the support member so with the seat plate that the loaded by a person sitting thereon part of the seat plate can be raised or lowered.

Lehnt sich die sitzende Person zurück, drückt das Stützteil zusammen mit dem hinteren Bereich der Rückenlehne den belasteten Bereich der Sitzplatte nach oben. Lehnt sich die Person nach vorn, ergibt sich eine leicht vorgeschobene Sitzposition mit nach vorn gedrückter Rückenlehne. Es wird somit selbsttätig ein gewisser Federungseffekt erreicht. Insgesamt stellt sich in Abhängigkeit von der Belastung ein dynamisches Gleichgewicht ein.Leaning the seated person back, presses the support member together with the rear of the backrest, the loaded area of the seat plate upwards. If the person leans forward, there is a slightly forward seating position with the backrest pushed forwards. It is thus automatically achieved a certain suspension effect. Overall, a dynamic equilibrium sets in depending on the load.

Die erfindungsgemäße Mechanik bietet dem Benutzer eine entspannte zurückgelehnte Position, jedoch auch eine vorgeschobene Sitzposition mit nach vorn gedrückter Rückenlehne. Die ergonomischen Vorteile dieses Stuhls sind im wesentlichen unabhängig von dem Gewicht des Benutzers nutzbar.The mechanism according to the invention offers the user a relaxed reclined position, but also an advanced seating position with the backrest pushed forward. The ergonomic advantages of this chair are essentially independent of the weight of the user usable.

Die Mechanik des erfindungsgemäßen Stuhls ist vergleichsweise einfach und kann daher auch kostengünstig in Stühlen verbaut werden, die in großer Anzahl verwendet werden, wie insbesondere in Reihenstühlen für Hallenbestuhlungen. Ein weiterer Vorteil besteht darin, dass die erfindungsgemäße Konstruktion aufgrund ihrer Einfachheit auch in Untergestellen verbaut werden können, die sich bevorzugt für Reihenstühle eignen, also seitlich mit benachbarten Stühlen verbindbar sind und stapelbar sind.The mechanism of the chair according to the invention is relatively simple and can therefore be installed inexpensively in chairs that are used in large numbers, especially in row chairs for hall seating. Another advantage is that the construction according to the invention can be installed in substructures due to their simplicity, which are preferably suitable for row chairs, so are laterally connected to adjacent chairs and stackable.

Das Stützteil verstärkt einen hinteren Bereich der Sitzplatte oder ist einteilig mit diesem ausgebildet. Das bedeutet, dass das Stützteil den hinteren Bereich der Sitzplatte abschnittsweise versteift, so dass dieser nicht mehr flexibel ist, sondern der Schwenkbewegung der Rückenlehne folgen kann.The support member reinforces a rear portion of the seat plate or is integrally formed therewith. This means that the support part stiffens the rear area of the seat plate in sections, so that it is no longer flexible, but can follow the pivoting movement of the backrest.

Weiter vorzugsweise verstärkt das Stützteil jeweils einen der beiden hinteren Eckbereiche der Sitzplatte, und ein zwischen diesen Eckbereich liegender mittlerer hinterer Bereich der Sitzplatte ist von den Eckbereichen durch Schlitze getrennt, die sich von der Rückenlehne aus in die Sitzplatte hinein erstrecken. Es werden in diesem Fall also lediglich die Eckbereiche versteift, während der dazwischen liegende Bereich aufgrund seiner Flexibilität eine gewisse Beweglichkeit und Nachgiebigkeit aufweisen kann.Further preferably, the support member each reinforces one of the two rear corner portions of the seat panel, and a middle rear portion of the seat panel located between these corner portions is separated from the corner portions by slits extending into the seat panel from the seat back. In this case, therefore, only the corner regions are stiffened, while the region lying in between can have a certain mobility and flexibility due to its flexibility.

Gemäß einer weiteren bevorzugten Ausführungsform ist das vordere Ende der Sitzplatte fest mit dem Untergestell verbunden.According to a further preferred embodiment, the front end of the seat plate is firmly connected to the base frame.

In einer alternativen Ausführungsform liegt das vordere Ende der Sitzplatte frei auf dem vorderen Ende des Untergestells auf.In an alternative embodiment, the front end of the seat plate rests freely on the front end of the underframe.

Die Sitzplatte ist elastisch verformbar. Sie hat somit das Bestreben, bei Nachlassen einer auf sie wirkenden Kraft, also durch eine Gewichtslast oder eine Kraft, die über das Stützteil auf die Sitzplatte wirkt, wieder in ihre ursprüngliche Form zurückzustreben. Die Elastizität wirkt somit als ein rückstellendes Moment.The seat plate is elastically deformable. It thus tends to return to its original shape when a force acting on it, ie by a weight load or a force that acts on the support plate on the seat plate. The elasticity thus acts as a restoring moment.

Weiter vorzugsweise ist der erfindungsgemäße Stuhl auf einem identischen Stuhl stapelbar ausgebildet.Further preferably, the chair according to the invention is stackable on an identical chair.

Weitere Merkmale und Vorteile der vorliegenden Erfindung ergeben sich aus der folgenden Beschreibung eines bevorzugten Ausfiihrungsbeispiels in Bezug auf die folgenden beigefügten Zeichnungen.

Fig. 1
ist eine schematische Darstellung eines Stuhls gemäß einer Ausführungsform der vorliegenden Erfindung in einer Seitenansicht, in der der Stuhl eine Ruhestellung einnimmt;
Fig. 2 und 3
sind Darstellungen des Stuhls aus Fig. 1 in verschiedenen Auslenkungspositionen der Rücklehne und der Sitzplatte;
Fig. 4 bis 6
sind Seitenansichten einer nicht der Erfindung entsprechenden Ausführungsform eines Stuhls in drei verschiedenen Positionen der Rückenlehne und der Sitzplatte;
Fig. 7 bis 9
sind Detailansichten des Stuhls aus den Fig. 4 bis 6, ebenfalls in verschiedenen Positionen;
Fig. 10
ist eine schematische Detailansicht des Rückstellglieds der Ausführungsform des Stuhls aus den Fig. 4 bis 6;
Fig. 11 und 12
sind perspektivische Ansichten der Ausführungsform des Stuhls aus den Fig. 4 bis 6 in verschiedenen Positionen;
Fig. 13
zeigt drei identische Exemplare der Ausführungsform des Stuhls aus den Fig. 4 bis 6 im aufeinandergestapelten Zustand;
Fig. 14
ist eine perspektivische Ansicht der Ausführungsform des Stuhls aus den Fig. 4 bis 6 schräg von unten; und
Fig. 15
ist eine Ansicht der Ausführungsform des Stuhls aus den Fig. 4 bis 6 senkrecht von unten.
Other features and advantages of the present invention will be apparent from the following description of a preferred embodiment with reference to the following accompanying drawings.
Fig. 1
is a schematic representation of a chair according to an embodiment of the present invention in a side view, in which the chair assumes a rest position;
FIGS. 2 and 3
are representations of the chair Fig. 1 in different deflection positions of the backrest and the seat plate;
4 to 6
are side views of an embodiment of a chair not according to the invention in three different positions of the backrest and the seat plate;
Fig. 7 to 9
are detail views of the chair from the 4 to 6 , also in different positions;
Fig. 10
is a schematic detail view of the return member of the embodiment of the chair from the 4 to 6 ;
FIGS. 11 and 12
are perspective views of the embodiment of the chair from the 4 to 6 in different positions;
Fig. 13
shows three identical copies of the embodiment of the chair from the 4 to 6 in the stacked state;
Fig. 14
is a perspective view of the embodiment of the chair from the 4 to 6 diagonally from below; and
Fig. 15
is a view of the embodiment of the chair from the 4 to 6 vertically from below.

Der in Fig. 1 dargestellte Stuhl 100 umfasst ein Untergestell 102, eine Sitzplatte 104 und eine Rückenlehne 106. In üblicher Weise ist die Sitzplatte 104 im wesentlichen horizontal orientiert, während die Rückenlehne 106 leicht nach hinten geneigt ist. Es wird angemerkt, dass die Begriffe "vorn", "hinten", "seitlich", usw. sich auf die Perspektive einer auf dem Stuhl 100 sitzenden Person beziehen. Das heißt, die Rückenlehne 106 ist hinten an der Rückseite des Stuhls 100 angeordnet, und alle übrigen Positionen und Raumrichtungen beziehen sich darauf.The in Fig. 1 illustrated chair 100 includes a base 102, a seat plate 104 and a backrest 106. In a conventional manner, the seat plate 104 is oriented substantially horizontally, while the backrest 106 is slightly inclined backwards. It is noted that the terms "front", "rear", "side", etc. refer to the perspective of a person sitting on the chair 100. That is, the backrest 106 is located at the rear of the back of the chair 100, and all other positions and spatial directions refer to it.

Die Rückenlehne 106 ist gegenüber der senkrechten Position leicht nach hinten geneigt und schließt einen Winkel von etwas mehr 90 Grad mit der Sitzplatte 104 ein. Die in Fig. 1 dargestellte Position stellt eine Ruhestellung des Stuhls 100 im unbelasteten Zustand dar, aus welcher verschiedene Teile des Stuhls 100 in die Positionen in den Fig. 2 und 3 beweglich sind, wie im folgenden noch näher verdeutlicht werden soll.The backrest 106 is slightly inclined backwards relative to the vertical position and encloses an angle of a little more than 90 degrees with the seat plate 104. In the Fig. 1 shown position represents a rest position of the chair 100 in the unloaded state, from which various parts of the chair 100 in the positions in the Fig. 2 and 3 are movable, as will be explained in more detail below.

Das Untergestell 102 umfasst in üblicher Weise vier Stuhlbeine, von denen in Fig. 1 lediglich das rechte hintere Stuhlbein 108 und das rechte vordere Stuhlbein 110 erkennbar sind. Die Stuhlbeine 108, 110 sind jeweils auf einer Seite des Stuhls 100, d. h. auf seiner rechten und linken Seite durch eine im wesentlichen horizontale Strebe 112 verbunden. Im vorliegenden Ausführungsbeispiel weist die Strebe 112 einen leichten Knick auf, so dass sie einen hinteren Teil 114 umfasst, der zur Rückenlehne 106 hin leicht aufwärts geneigt ist, und einen vorderen Teil 116, der zum vorderen Ende des Stuhls 100 leicht nach oben geneigt ist. Insgesamt bilden die Stuhlbeine 108, 110 zusammen mit der im wesentlichen horizontalen Strebe 112 eine Anordnung, die im wesentlichen die Form eines umgedrehten Buchstabens "U" hat.The base 102 includes four chair legs in a conventional manner, of which in Fig. 1 only the right rear chair leg 108 and the right front chair leg 110 can be seen. The chair legs 108, 110 are each connected on one side of the chair 100, ie on its right and left sides by a substantially horizontal strut 112. In the present embodiment, the strut 112 has a slight bend, so that it comprises a rear part 114 which is slightly inclined upwards towards the backrest 106, and a front part 116, which is inclined slightly upwards to the front end of the chair 100. Overall, the chair legs 108, 110, together with the substantially horizontal strut 112, form an assembly that is substantially in the shape of an inverted letter "U".

In der oberen hinteren Ecke dieser Anordnung, in welcher das obere Ende des rechten hinteren Stuhlbeins 108 mit dem hinteren Ende der Strebe 112 zusammentrifft, ist ein Lager 118 für eine horizontale Querachse 120 angeordnet. Diese Querachse 120 ist quer zum Stuhl 100 gerichtet und auf der in Fig. 1 nicht sichtbaren linken Stuhlseite in einem vergleichbaren Lager gehalten. Um diese Querachse 120 ist die Rückenlehne 106 schwenkbar, so dass ihre Neigung veränderbar ist.In the upper rear corner of this arrangement, in which the upper end of the right rear chair leg 108 coincides with the rear end of the strut 112, a bearing 118 for a horizontal transverse axis 120 is disposed. This transverse axis 120 is directed across the chair 100 and on the in Fig. 1 invisible left side of the chair held in a comparable warehouse. Around this transverse axis 120, the backrest 106 is pivotable, so that its inclination is variable.

Vom unteren Ende der Rückenlehne 106 geht ein Paar von Stützteilen 122 aus, die sich in Richtung der Sitzplatte 104 erstrecken. Im einzelnen erstreckt sich von jeder hinteren Ecke des Stuhls 100 ein Stützteil 122 nach vorn und verstärkt den jeweiligen hinteren Eckbereich der Sitzplatte und versteift diesen. Beispielsweise kann das Stützteil 122 über seine gesamte Länge von unten an der Sitzfläche 104 anliegen und an dieser befestigt sein. Denkbar ist jedoch auch, dass das Stützteil 122 in diesem Eckbereich einstückig mit der Sitzplatte 104 ausgebildet oder ausgeformt ist.From the lower end of the backrest 106 is a pair of support members 122 extending in the direction of the seat plate 104. Specifically, from each rear corner of the chair 100, a support member 122 extends forward and reinforces the respective rear corner portion of the seat panel and stiffen it. For example, the support member 122 may rest against the seat surface 104 over its entire length from below and be secured thereto. However, it is also conceivable that the support member 122 is formed or formed integrally with the seat plate 104 in this corner region.

Während die Sitzplatte 104 aus einem elastisch verformbaren Material hergestellt sein kann, sind die jeweiligen Stützteile 122 biegesteif. In den verstärkten oder gestützten hinteren Eckbereichen ist die Sitzplatte 104 somit nicht mehr elastisch. Ein zwischen den Eckbereichen liegender mittlerer Bereich der Sitzplatte 104 kann hingegen eine gewisse Elastizität aufweisen und zu diesem Zweck von den verstärkten und versteiften Eckbereichen getrennt sein, etwa durch Schlitze, die sich von der Rückenlehne 106 aus in die Sitzplatte 104 hinein erstrecken.While the seat panel 104 may be made of an elastically deformable material, the respective support members 122 are rigid. In the reinforced or supported rear corner regions, the seat plate 104 is thus no longer elastic. On the other hand, a middle region of the seat plate 104 lying between the corner regions may have a certain elasticity and for this purpose be separated from the reinforced and stiffened corner regions, for instance through slots extending into the seat plate 104 from the backrest 106.

Das Stützteil 122 ist starr mit der Rückenlehne 106 gekoppelt und folgt deren Schwenkbewegung um die Querachse 120, wie im folgenden dargestellt ist. Hierdurch wird ein vor dem vorderen Ende des Stützteils 122 gelegener Bereich der Sitzplatte 104 angehoben oder abgesenkt, je nach Schwenkrichtung der Rückenlehne 106.The support member 122 is rigidly coupled to the seat back 106 and follows its pivotal movement about the transverse axis 120, as shown below. As a result, an area of the seat plate 104 located in front of the front end of the support part 122 is raised or lowered, depending on the pivoting direction of the backrest 106.

In Fig. 2 ist beispielsweise dargestellt, wie die Rückenlehne 106 nach hinten geschwenkt wird. Diese Situation kann beispielsweise auftreten, wenn eine auf dem Stuhl 100 sitzende Person sich zurücklehnt und somit eine Druckkraft nach hinten auf die Rückenlehne 106 ausgeübt wird. Das dieser Schwenkbewegung (in Fig. 2 im Gegenuhrzeigersinn) folgende Stützteil 122 übt von unten einen Druck gegen die Sitzplatte 104 aus, der bewirkt, dass ein etwa mittlerer Teil der Sitzplatte 104, der sich im Abstand von der Rückenlehne 106 befindet, geringfügig angehoben wird. Da das vordere Ende der Sitzplatte 104 in der vorliegenden Ausführungsform fest mit dem Untergestell 102 verbunden ist, wird die flexible Sitzplatte 104 in sich verformt, d. h. nach oben gewölbt, und zwar gegen das Gewicht des auf dem Stuhl 100 sitzenden Benutzers. Durch diese Gewichtslast strebt die Sitzplatte 104 wieder in ihre ursprüngliche Form in Fig. 1 (also nach unten) zurück, und aufgrund der starren Kopplung zwischen dem Stützteil 122 und der Rückenlehne 106 wird die Rückenlehne 106 nach vorn gegen den Rücken des Benutzers gedrückt.In Fig. 2 For example, it is shown how the backrest 106 is pivoted to the rear. This situation may occur, for example, when a person sitting on the chair 100 leans back and thus a pressure force is exerted backwards on the backrest 106. That of this pivoting movement (in Fig. 2 counterclockwise) following support member 122 exerts from below a pressure against the seat plate 104, which causes an approximately central portion of the seat plate 104, which is located at a distance from the backrest 106, is slightly raised. Since the front end of the seat plate 104 is fixedly connected to the base 102 in the present embodiment, the flexible seat plate 104 is deformed, ie, arched upward, against the weight of the user sitting on the chair 100. Due to this weight load, the seat plate 104 strives to return to its original shape Fig. 1 (ie, down), and due to the rigid coupling between the support member 122 and the backrest 106, the backrest 106 is pressed forward against the back of the user.

Es stellt sich somit in Abhängigkeit vom Gewicht des Benutzers und dessen Körperposition, die eine Gewichtsverlagerung bewirken kann, eine neue Gleichgewichtsstellung von Rückenlehne 106 und Sitzplatte 104 ein.Thus, depending on the weight of the user and his body position, which can cause a shift in weight, a new equilibrium position of backrest 106 and seat plate 104 is established.

Es wird angemerkt, dass abweichend von der hier dargestellten Ausführungsform das vordere Ende der Sitzplatte 104 nicht zwangsläufig fest am Untergestell 102 befestigt sein muss. Vielmehr kann das vordere Ende der Sitzplatte 104 auch frei auf dem Untergestell 102 aufliegen und allein durch die Gewichtskraft des Benutzers, die insbesondere durch seine auf dem vorderen Ende der Sitzplatte 104 aufliegenden Oberschenkel ausgeübt wird, auf der vorderen oberen Kante des Untergestells 102 gehalten wird.It is noted that unlike the embodiment shown here, the front end of the seat plate 104 does not necessarily have to be firmly fixed to the base 102. Rather, the front end of the seat plate 104 can also rest freely on the base frame 102 and be held on the front upper edge of the base frame 102 solely by the weight of the user, who is exercised in particular by his resting on the front end of the seat plate 104 thigh.

Wird aus der Position in Fig. 2 die Rückenlehne 106 in entgegengesetzter Richtung (also im Uhrzeigersinn) geschwenkt, und zwar über die in Fig. 1 dargestellte Ruheposition hinaus, wird die in Fig. 3 dargestellte Position erreicht, in der die Sitzplatte 104 aus ihrer Ruheposition etwas nach unten gewölbt ist, also in entgegengesetzter Richtung verglichen mit Fig. 2. Diese Position kann dann erreicht werden, wenn der Benutzer des Stuhls 100 sich leicht nach vorn lehnt. In diesem Fall gibt die Sitzplatte 104 aufgrund ihrer Elastizität etwas nach unten nach. Die Sitzplatte 104 kann so am Untergestell 102 befestigt sein, dass bei dieser Bewegung in die Position in Fig. 3 ein Anschlag erreicht wird, in welchem die linken und rechten Seitenkanten der Sitzplatte 104 auf der horizontalen Strebe 112 des Untergestells 102 aufliegen, so dass eine weitere Auslenkung in Abwärtsrichtung nicht mehr möglich ist.Will be from the position in Fig. 2 pivoted the backrest 106 in the opposite direction (ie clockwise), via the in Fig. 1 shown rest position, the in Fig. 3 achieved position shown in which the seat plate 104 is curved from its rest position slightly downwards, so compared in the opposite direction With Fig. 2 , This position can be achieved when the user of the chair 100 leans forward slightly. In this case, the seat plate 104 yields slightly downward due to its elasticity. The seat plate 104 may be secured to the base 102 so that in this movement in the position in Fig. 3 a stop is reached, in which the left and right side edges of the seat plate 104 rest on the horizontal strut 112 of the undercarriage 102, so that a further deflection in the downward direction is no longer possible.

Aus der Position in Fig. 3 können sich Sitzplatte 104 und Rückenlehne 106 wieder in die Position in Fig. 1 bewegen, beispielsweise wenn der Benutzer aufsteht und somit die Gewichtskraft auf die Sitzplatte 104 nachlässt. Dann strebt die Sitzplatte 104 aufgrund ihrer Elastizität wieder in die horizontale Stellung zurück, und die hierbei wirkende Rückstellkraft wird über das Stützteil 122 auf die damit starr gekoppelte Rückenlehne 106 übertragen.From the position in Fig. 3 Seat plate 104 and backrest 106 can be returned to the position in FIG Fig. 1 move, for example, when the user stands up and thus relieves the weight on the seat plate 104. Then, due to its elasticity, the seat plate 104 strives to return to the horizontal position, and the restoring force acting in this case is transmitted via the support part 122 to the backrest 106 rigidly coupled thereto.

Der erfindungsgemäße Effekt der Schaffung einer dynamischen Gleichgewichtsposition der sitzenden Person wird im wesentlichen dadurch bewirkt, dass durch das Stützteil 122, das fest mit der Rückenlehne 106 gekoppelt ist, bei einer Schwenkbewegung der Rückenlehne 106 die Sitzplatte 104 aufwärts drückt bzw. eine Abwärtsbewegung derselben zulässt und somit dieser Bereich bzw. ein vor dem Ende des Stützteils 122 gelegener Bereich der Sitzplatte 104 angehoben oder abgesenkt wird. Die Sitzplatte 104 kann hierzu in sich elastisch verformbar sein, etwa durch Wahl eines geeigneten biegeelastischen Materials, oder kann durch ein Scharnier, wie etwa ein Filmscharnier, in einen vorderen und einen hinteren Bereich geteilt sein, die gegeneinander leicht verschwenkbar sind. Es sind somit verschiedene Ausführungsformen denkbar, um die Verformbarkeit der Sitzplatte 104 zu gewährleisten. Es ist im übrigen auch denkbar, dass das Stützteil 122 durch einen hinteren verstärkten Abschnitt der Sitzplatte 104 gebildet wird, d. h. es handelt sich nicht um ein separates Teil, sondern die Sitzplatte 104 selbst ist an einem hinteren, der Rückenlehne 106 zugewandten Abschnitt starr und bieselbst ist an einem hinteren, der Rückenlehne 106 zugewandten Abschnitt starr und biegefest ausgeformt, während ein davon gelegener Abschnitt 104 elastisch ist oder von diesem hinteren starren Abschnitt durch ein Filmscharnier oder dergleichen getrennt ist.The inventive effect of creating a dynamic equilibrium position of the seated person is essentially achieved by the support member 122, which is fixedly coupled to the backrest 106, during a pivotal movement of the backrest 106, the seat plate 104 pushes upward or downward movement of the same permits and Thus, this area or a front of the end of the support member 122 located portion of the seat plate 104 is raised or lowered. For this purpose, the seat plate 104 may be elastically deformable in itself, for example by selecting a suitable flexurally elastic material, or may be divided by a hinge, such as a film hinge in a front and a rear portion which are slightly pivoted against each other. There are thus various embodiments conceivable to ensure the deformability of the seat plate 104. It is also conceivable that the support member 122 is formed by a rear reinforced portion of the seat plate 104, that is, it is not a separate part, but the seat plate 104 itself is at a rear, the backrest 106 facing portion rigid and there itself is rigidly and flexurally formed at a rear portion facing the seat back 106, while a portion 104 thereof is elastic or separated from this rear rigid portion by a living hinge or the like.

Der Stuhl 100 gemäß der ersten Ausführungsform kann als stapelbarer Stuhl ausgebildet sein oder zu einem solchen weiterentwickelt werden. Diesbezüglich sollen Einzelheiten in den Fig. 1 bis 3, sofern sie einer solchen Stapelbarkeit entgegen stehen, nicht als beschränkend für die vorliegende Erfindung verstanden werden. Indessen ist die erfindungsgemäße Mechanik nicht ausschließlich an Stapelstühle gebunden, sondern kann auch auf andere Gestell-Unterkonstruktionen angewendet werden, beispielsweise auf Bürostühle mit einem Drehkreuzgestell.The chair 100 according to the first embodiment may be formed as a stackable chair or further developed to such. In this regard, details in the Fig. 1 to 3 unless they oppose such stackability, are not to be understood as limiting the present invention. However, the mechanism according to the invention is not exclusively tied to stackable chairs, but can also be applied to other frame substructures, for example on office chairs with a turnstile frame.

In den folgenden Figuren 4 bis 15 ist eine Ausführungsform des Stuhls 10 dargestellt, die nicht der vorliegenden Erfindung entspricht. Wie auch der in den Fig. 1 bis 3 dargestellte Stuhl 100 umfasst der Stuhl 10 gemäß der vorliegenden, nicht der Erfindung entsprechenden Ausführungsform ein Untergestell 12, eine Sitzplatte 14 und eine Rückenlehne 16. In üblicher Weise ist die Sitzplatte 14 im wesentlichen horizontal und nur leicht nach hinten, d. h. zur Rückenlehne 16 hin abfallend auf dem Untergestell 12 angeordnet.In the following FIGS. 4 to 15 an embodiment of the chair 10 is shown, which does not correspond to the present invention. Like in the Fig. 1 to 3 illustrated chair 10 includes the chair 10 according to the present, not according to the invention embodiment, a base 12, a seat plate 14 and a backrest 16. In the usual way, the seat plate 14 is substantially horizontal and only slightly to the rear, ie sloping back to the backrest 16 arranged on the base 12.

Die Rückenlehne 16 ist gegenüber der senkrechten Position leicht nach hinten geneigt und schließt einen Winkel von etwas mehr 90 Grad mit der Sitzplatte 14 ein. Die in Fig. 4 dargestellte Position stellt eine Ruhestellung des Stuhls 10 im unbelasteten Zustand dar, aus welcher verschiedene Teile des Stuhls 10 in andere Positionen beweglich sind, wie im folgenden noch näher verdeutlicht werden soll.The backrest 16 is inclined slightly backwards relative to the vertical position and encloses an angle of a little more than 90 degrees with the seat plate 14. In the Fig. 4 shown position represents a rest position of the chair 10 in the unloaded state, from which various parts of the chair 10 are movable to other positions, as will be explained in more detail below.

Das Untergestell 12 umfasst in üblicher Weise vier Stuhlbeine, von denen in Fig. 4 lediglich das rechte hintere Stuhlbein 18 und das rechte vordere Stuhlbein 20 erkennbar sind. Die Stuhlbeine 18,20 sind jeweils auf einer Seite des Stuhls 10, d. h. auf seiner rechten und linken Seite durch eine im wesentlichen horizontale und nach vorn leicht abfallende Strebe 22 verbunden. Die rechten Stuhlbeine 18,20 bilden zusammen mit der rechten Strebe 22 also eine Anordnung, die im wesentlichen die Form eines umgedrehten Buchstabens "U" hat.The base 12 comprises in a conventional manner four chair legs, of which in Fig. 4 only the right rear chair leg 18 and the right front chair leg 20 can be seen. The chair legs 18, 20 are each on one side of the chair 10, ie on its right and left sides by a substantially horizontal and forward slightly sloping strut 22 connected. The right-hand chair legs 18, 20 together with the right-hand strut 22 thus form an arrangement which essentially has the shape of an inverted letter "U".

An der oberen hinteren Ecke dieser Anordnung, an welcher das obere Ende des rechten hinteren Stuhlbeins 18 mit dem hinteren Ende der rechten Strebe 22 zusammentrifft, ist ein Lager 24 für eine horizontale Querachse 26 angeordnet. Diese Querachse 26 ist quer zum Stuhl 10 gerichtet und auf der in Fig. 4 nicht sichtbaren linken Stuhlseite in einen vergleichbaren Lager gehalten. Um diese Querachse 26 ist die Rückenlehne 16 schwenkbar, so dass ihre Neigung veränderbar ist.At the upper rear corner of this arrangement, at which the upper end of the right rear chair leg 18 coincides with the rear end of the right strut 22, a bearing 24 for a horizontal transverse axis 26 is arranged. This transverse axis 26 is directed across the chair 10 and on the in Fig. 4 invisible left side of the chair held in a comparable camp. Around this transverse axis 26, the backrest 16 is pivotable so that its inclination is variable.

Vom unteren Ende der Rückenlehne 16 geht ein Paar von Hebeln aus, die sich von hinten unter die Sitzplatte 14 erstrecken. Diese Hebel bilden bei der vorliegenden Ausführungsform des Stuhls 10 das Stützteil zum Stützen der Sitzplatte 14. In den Seitenansichten der Figuren 4 bis 6 ist jeweils nur ein Hebel 28 erkennbar, auf welchen in der folgenden Beschreibung Bezug genommen werden soll. Der Hebel 28 (so wie auch sein Gegenstück auf der gegenüberliegenden Seite des Stuhls 10) kann beispielsweise fest an der Querachse 26 angebracht sein, die sich zusammen mit der Rückenlehne 16 innerhalb der Lager 24 dreht. Der Hebel 28 folgt somit der Schwenkbewegung der Rückenlehne 16. Wird die Rückenlehne 16 nach hinten gekippt, so hebt sich das vordere Ende des Hebels 28 und übt von unten einen Druck gegen die Sitzplatte 14 aus.From the lower end of the backrest 16, a pair of levers extend, which extend from under the seat plate 14 from behind. These levers form in the present embodiment of the chair 10, the support member for supporting the seat plate 14. In the side views of FIGS. 4 to 6 in each case only one lever 28 can be seen, to which reference should be made in the following description. The lever 28 (as well as its counterpart on the opposite side of the chair 10) may for example be fixedly attached to the transverse axis 26, which rotates together with the backrest 16 within the bearings 24. The lever 28 thus follows the pivoting movement of the backrest 16. If the backrest 16 is tilted backwards, the front end of the lever 28 lifts and exerts a pressure against the seat plate 14 from below.

Die Sitzplatte 14 ist in Querrichtung im wesentlichen in zwei Teile geteilt, nämlich in einen längeren vorderen Teil 30 und einen kürzeren hinteren Teil 32. Der vordere Teil 30 ist mit dem hinteren Teil 32 durch ein Filmscharnier 34 verbunden, dessen Scharnierachse etwa in der Oberseite, d. h. in der eigentlichen Sitzfläche der Sitzplatte 14 liegt. Die beiden Teile 30, 32 der Sitzplatte 14 sind somit flexibel miteinander verbunden, so dass der hintere Teil 32 eine leichte Schwenkbewegung gegenüber dem vorderen Teil 30 ausüben kann. Die Sitzplatte 14 ist somit in sich verformbar.The seat plate 14 is divided transversely substantially into two parts, namely a longer front part 30 and a shorter rear part 32. The front part 30 is connected to the rear part 32 by a living hinge 34, the hinge axis approximately in the top, ie lies in the actual seat of the seat plate 14. The two parts 30, 32 of the seat plate 14 are thus flexibly connected to each other, so that the rear part 32 can exert a slight pivoting movement relative to the front part 30. The seat plate 14 is thus deformable in itself.

Das hintere Ende 36 des vorderen Teils 30 der Sitzplatte 14 ist an der Unterseite der Sitzplatte 14 über ein Gelenk 38 mit dem Ende des Hebels 28 verbunden. Die Gelenkachse dieses Gelenks 38 steht horizontal und parallel zu der hinteren Querachse 26. Das vordere Ende 40 des vorderen Teils 30 der Sitzplatte 14 ist mit dem Untergestell 12 durch ein Schwenklager 42 verbunden, welches es ermöglicht, dass der vordere Teil 30 der Sitzplatte 14 in Aufwärts- und Abwärtsrichtung gegenüber dem Untergestell 12 schwenkbar ist, so dass sich das hintere Ende dieses vorderen Teils 30 anheben oder absenken kann. Im einzelnen umfasst dieses Schwenklager 42 eine Schwenkachse 44, die mit Spiel in Vorwärts- und Rückwärtsrichtung in einer Lagerhülse 46 einliegt, die fest an der Unterseite des vorderen Endes 40 des vorderen Teils 30 der Sitzplatte 14 ausgeformt ist. Dieses Spiel ermöglicht neben der Verschwenkbarkeit des vorderen Teils 30 der Sitzplatte 14 in Aufwärts- und Abwärtsrichtung also eine leichte Verschiebung des vorderen Teils 30 in Vorwärts- und Rückwärtsrichtung.The rear end 36 of the front part 30 of the seat plate 14 is connected at the bottom of the seat plate 14 via a hinge 38 with the end of the lever 28. The hinge axis of this hinge 38 is horizontal and parallel to the rear transverse axis 26. The front end 40 of the front part 30 of the seat plate 14 is connected to the base 12 by a pivot bearing 42, which allows the front part 30 of the seat plate 14 in Up and down direction relative to the base frame 12 is pivotable, so that the rear end of this front part 30 can raise or lower. Specifically, this pivot bearing 42 includes a pivot axis 44 which rests with play in the forward and backward direction in a bearing sleeve 46 which is formed integrally on the underside of the front end 40 of the front part 30 of the seat plate 14. This game allows in addition to the pivotability of the front part 30 of the seat plate 14 in the upward and downward direction so a slight displacement of the front part 30 in the forward and backward direction.

Die Schwenkachse 44 steht horizontal in Querrichtung des Stuhls, also parallel zur hinteren Querachse 26, und wird durch ein Paar von Mittelstreben 48 gehalten, die fester Bestandteil des Untergestells 12 sind und mittig unterhalb der Sitzplatte 14 von der hinteren Querachse 26 ausgehend nach vorn laufen. Sie liegen an einer in Fig. 4 nicht sichtbaren vorderen Querstrebe 60 (siehe Fig. 14) des Untergestells 12 auf, die zwischen den oberen Enden der vorderen Stuhlbeine 20 verläuft, und weisen im Bereich des Gelenks 38 einen leichten Knick auf, von welchem ausgehend die längeren vorderen Enden der Mittelstreben 48 und die kürzeren hinteren Enden aufwärts geneigt sind. An ihren hinteren Enden sind die Mittelstreben 48 schwenkbar mit der hinteren Querachse 26 verbunden.The pivot axis 44 is horizontal in the transverse direction of the chair, so parallel to the rear transverse axis 26, and is held by a pair of center struts 48, which are an integral part of the base 12 and run centrally below the seat plate 14, starting from the rear transverse axis 26 forward. They are located at an in Fig. 4 invisible front cross strut 60 (see Fig. 14 ) of the undercarriage 12, which extends between the upper ends of the front chair legs 20, and have in the region of the joint 38 a slight bend, from which starting the longer front ends of the center struts 48 and the shorter rear ends are inclined upwards. At their rear ends, the center struts 48 are pivotally connected to the rear transverse axis 26.

Der hintere Teil 32 der Sitzplatte 14 liegt mit seinem hinteren Ende 50 auf der hinteren Querachse 26 auf und wird somit durch diese gestützt.The rear part 32 of the seat plate 14 rests with its rear end 50 on the rear transverse axis 26 and is thus supported by this.

Insgesamt ist die Sitzplatte 14 also im wesentlichen in zwei Teile geteilt, nämlich in den vorderen Teil 30 und den hinteren Teil 32, die durch das Filmscharnier 34 flexibel verbunden sind, so dass sie gegeneinander beweglich sind. Diese in sich bewegliche Sitzplatte 14 wird von ihrer Unterseite her durch den Hebel 28 gestützt, der fest von der Rückenlehne 16 ausgeht, so dass eine Bewegung der Rückenlehne 16 über die hintere Querachse 26, den Hebel 28 und das Gelenk 38 auf die Sitzplatte 14 übertragen wird. Dieser Mechanismus soll im folgenden näher erläutert werden.Overall, the seat plate 14 is thus substantially divided into two parts, namely in the front part 30 and the rear part 32, which are flexibly connected by the film hinge 34, so that they are mutually movable. This inwardly movable seat plate 14 is supported from its underside by the lever 28 which extends solidly from the backrest 16, so that a movement of the backrest 16 on the rear transverse axis 26, the lever 28 and the hinge 38 transmitted to the seat plate 14 becomes. This mechanism will be explained in more detail below.

Wird die Sitzplatte 14 des Stuhls 10 aus der unbelasteten Stellung in Fig. 4 von oben belastet, etwa durch das Gewicht einer sich auf den Stuhl 10 setzenden Person, gibt zunächst die Sitzfläche 14 nach unten nach, so wie es in Fig. 2 dargestellt ist. Hierbei wird das hintere Ende 36 des vorderen Teils 30 der Sitzplatte 14 um die Schwenkachse 44 des Schwenklagers 42 nach unten geschwenkt, so dass das hintere Ende 36 abgesenkt wird und einen Druck von oben auf das Ende des Hebels 28 ausübt. Dieser wird ebenfalls nach unten gedrückt. Durch die starre Kopplung zwischen Hebel 28 und Rückenlehne 16 wird die Rückenlehne 16 nach vorn gegen den Rücken des Benutzers gedrückt. Da dieser beim Zurücklehnen einen Gegendruck auf die Rückenlehne 16 ausübt, stellt sich in Abhängigkeit vom Gewicht des Benutzers und dessen Körperposition, die eine Gewichtsverlagerung bewirken kann, eine neue Gleichgewichtsstellung von Rückenlehne 16 und Sitzplatte 14 ein. Verlagert der Benutzer das Gewicht nach hinten, so drückt er die Rückenlehne 16 nach hinten, so dass der Hebel 28 einen Druck von unten gegen die Sitzplatte 14 ausübt. Hierdurch wird das hintere Ende 36 des hinteren Teils 30 der Sitzplatte 14 wiederum angehoben.Is the seat plate 14 of the chair 10 from the unloaded position in Fig. 4 loaded from above, for example by the weight of a person sitting on the chair 10, first gives the seat 14 downwards, as it is in Fig. 2 is shown. Here, the rear end 36 of the front part 30 of the seat plate 14 is pivoted about the pivot axis 44 of the pivot bearing 42 down, so that the rear end 36 is lowered and exerts a pressure from above on the end of the lever 28. This is also pressed down. Due to the rigid coupling between the lever 28 and backrest 16, the backrest 16 is pressed forward against the back of the user. Since this applies a back pressure on the backrest 16 when leaning back, depending on the weight of the user and his body position, which can cause a weight shift, a new equilibrium position of the backrest 16 and seat plate 14 a. If the user moves the weight backwards, he presses the backrest 16 backwards, so that the lever 28 exerts a pressure from below against the seat plate 14. As a result, the rear end 36 of the rear part 30 of the seat plate 14 is raised again.

Eine solche angehobene Position über die Ruhestellung aus Fig. 4 hinaus ist in Fig. 6 dargestellt. Hier ist die Position des vorderen Teils 30 der Sitzplatte 14 der horizontalen Stellung weiter angenähert, während der hintere Teil 32 der Sitzplatte 14 von der Achse des Filmscharniers 34 aus weiter nach unten und hinten abfällt. Während der vordere Teil 30 und der hintere Teil 32 der Sitzplatte 14 in der Ruhestellung in Fig. 4 nahezu miteinander fluchten, d. h. annähernd in einer Ebene liegen, sind die beiden Teile 30,32 in den Extremstellungen in den Fig. 5 und 6 in unterschiedliche Richtungen gegeneinander geknickt. Das hintere Ende 50 des hinteren Teils 32 liegt in den unterschiedlichen Positionen stets auf der hinteren Querachse 26 auf und wird durch diese gestützt.Such a raised position on the rest position Fig. 4 addition is in Fig. 6 shown. Here, the position of the front portion 30 of the seat panel 14 is further approximated to the horizontal position, while the rear portion 32 of the seat panel 14 drops further downwardly and rearwardly from the axis of the film hinge 34. While the front part 30 and the rear part 32 of the seat plate 14 in the rest position in Fig. 4 Almost aligned with each other, that are approximately in one plane, the two parts are 30,32 in the extreme positions in the Fig. 5 and 6 kinked in different directions against each other. The rear end 50 of the rear part 32 is always in the different positions on the rear transverse axis 26 and is supported by this.

Da die hintere Querachse 26 und die vordere Schwenkachse 44 des Schwenklagers 42 bezüglich des Untergestells 12 ortsfest sind und einen festen Abstand zueinander haben, muss der vordere Teil 30 der Sitzplatte 14 mit einem gewissen Spiel in Vorwärts- und Rückwärtsrichtung am Untergestell 12 gelagert sein, um den sich verändernden Abstand zwischen dem Gelenk 38 und der Schwenkachse 44 während der Schwenkbewegung ausgleichen zu können. Dieses Spiel wird dadurch ermöglicht, dass die Lagerhülse 46 in Vorwärts- und Rückwärtsrichtung eine größere Breite aufweist als der Durchmesser der Schwenkachse 44, so dass die Lagerhülse 46 auf der Schwenkachse 44 vor und zurück verschiebbar ist. Dies wird in den Fig. 5 und 6 deutlich. In Fig. 5, in der das hintere Ende 36 des vorderen Teils 30 der Sitzplatte 14 abgesenkt ist, ist dieser vordere Teil 30 etwas nach hinten gezogen, so dass die Schwenkachse 44 an einer vorderen Wand der Lagerhülse 46 anliegt. Der umgekehrte Fall tritt in Fig. 6 ein, in welchem der vordere Teil 30 der Sitzplatte 14 während der Aufwärtsbewegung seines hinteren Endes 36 etwas nach vorn geschoben wird, so dass die Schwenkachse 44 sich einer hinteren Wand der Lagerhülse 46 nähert.Since the rear transverse axis 26 and the front pivot axis 44 of the pivot bearing 42 with respect to the base 12 are stationary and have a fixed distance from each other, the front part 30 of the seat plate 14 with a certain play in the forward and backward direction on the base 12 must be stored to to be able to compensate for the changing distance between the hinge 38 and the pivot axis 44 during the pivoting movement. This clearance is made possible by the fact that the bearing sleeve 46 in the forward and backward direction has a greater width than the diameter of the pivot axis 44, so that the bearing sleeve 46 on the pivot axis 44 is displaceable back and forth. This will be in the Fig. 5 and 6 clear. In Fig. 5 , in which the rear end 36 of the front part 30 of the seat plate 14 is lowered, this front part 30 is slightly pulled back so that the pivot axis 44 abuts against a front wall of the bearing sleeve 46. The reverse case occurs Fig. 6 in which the front part 30 of the seat plate 14 is pushed slightly forward during the upward movement of its rear end 36, so that the pivot axis 44 approaches a rear wall of the bearing sleeve 46.

Die Kopplung der Bewegung der einzelnen Teile miteinander wird in den Detailansichten in den Fig. 7, 8 und 9 nochmals besonders deutlich, in denen Fig. 7 wiederum die Ruhestellung des Stuhls 10 gemäß Fig. 4 darstellt, während die Fig. 8 und 9 den Stellungen aus den Fig. 5 und 6 entsprechen.The coupling of the movement of the individual parts together is shown in the detail views in the Fig. 7, 8 and 9 again particularly clear in which Fig. 7 again the rest position of the chair 10 according to Fig. 4 represents while the Fig. 8 and 9 the positions from the Fig. 5 and 6 correspond.

Zur Rückstellung des Hebels 28 und der Sitzplatte 14 aus einer ausgelenkten Stellung, wie in den Fig. 5 und 6 dargestellt, in die Ruhestellung aus Fig. 4 umfasst der Stuhl 10 ein Rückstellglied 52 innerhalb des Schwenklagers 42 mit zwei Federn 54,56, die in der Lagerhülse 46 zwischen der Hülsenwand 58 und der Schwenkachse 44 gegenüberliegend einliegen, wie in Fig. 10 schematisch dargestellt ist. Durch die beiden Federn 54,56, die gegenüberliegend an der Schwenkachse 44 angeordnet sind, wird die Schwenkachse 44 in die in Fig. 10 dargestellte Ruhestellung gedrückt. Während der vordere Teil 30 der Sitzplatte 14 die in den Fig. 4 bis 6 bzw. 7 bis 9 gezeigte Schwenkbewegung ausführt, wird dieser Teil 30 gleichzeitig in Bezug auf die Schwenkachse 44 vor und zurück verschoben. Beispielsweise ist die Schwenkachse 44 in der belasteten Stellung des Stuhls 10 in Fig. 5 nach vorn innerhalb des Schwenklagers 42 verschoben, bzw. die Lagerhülse 46 ist gegenüber der fest positionierten Schwenkachse 44 nach hinten verschoben, so dass die Feder 56 in Fig. 10 komprimiert wird. Wird der Stuhl 10 aus der Stellung in Fig. 5 entlastet, drückt die Feder 56 die vordere Seite der Hülsenwand 58 der Lagerhülse 46 nach vorn, so dass die Schwenkachse 44 diesbezüglich nach hinten verschoben wird und wieder die Ruhestellung gemäß Fig. 10 bzw. Fig. 4 oder Fig. 7 eingenommen wird.To return the lever 28 and the seat plate 14 from a deflected position, as in the Fig. 5 and 6 shown, in the rest position off Fig. 4 The chair 10 includes a return member 52 within the pivot bearing 42 with two springs 54,56 which are in the bearing sleeve 46 between the sleeve wall 58 and the pivot axis 44 opposite einliegen, as in Fig. 10 is shown schematically. Through the two springs 54,56, which are arranged opposite to the pivot axis 44, the pivot axis 44 in the in Fig. 10 shown rest position pressed. While the front part 30 of the seat plate 14 in the 4 to 6 7 to 9, this part 30 is simultaneously displaced back and forth with respect to the pivot axis 44. For example, the pivot axis 44 in the loaded position of the chair 10 in Fig. 5 moved forward within the pivot bearing 42, or the bearing sleeve 46 is moved relative to the fixedly positioned pivot axis 44 to the rear, so that the spring 56 in Fig. 10 is compressed. Will the chair 10 from the position in Fig. 5 Relieved, the spring 56 pushes the front side of the sleeve wall 58 of the bearing sleeve 46 forward, so that the pivot axis 44 in this respect is moved to the rear and again the rest position according to Fig. 10 or. Fig. 4 or Fig. 7 is taken.

Umgekehrt ist in der Stellung gemäß Fig. 9 bzw. Fig. 12 die Lagerhülse 46 bezüglich der Schwenkachse 44 nach vorne verschoben, so dass die gegenüberliegende Feder 54 komprimiert wird und bei Entlastung die Lagerhülse 56 bezüglich der Schwenkachse 44 wieder in die Ruhestellung drückt.Conversely, in the position according to Fig. 9 or. Fig. 12 the bearing sleeve 46 with respect to the pivot axis 44 is moved forward so that the opposite spring 54 is compressed and presses the bearing sleeve 56 with respect to the pivot axis 44 back to the rest position.

Die Positionen aus den Fig. 5 und 6 bzw. 8 und 9 stellen somit maximale Vorschubspositionen und Rückzugspositionen der Schwenkachse 44 bezüglich der Lagerhülse 46 dar, zwischen denen die Position gemäß Fig. 4, 7 und 10 eine Zwischenstellung darstellt.The positions from the Fig. 5 and 6 8 and 9 thus represent maximum feed positions and retraction positions of the pivot axis 44 with respect to the bearing sleeve 46, between which the position according to Fig. 4 . 7 and 10 represents an intermediate position.

Die vorliegende Ausführungsform des Stuhls 10 gestattet eine Stapelung mehrerer identischer Stühle 10 aufeinander, wie in Fig. 13 dargestellt. Dies wird aufgrund der sehr einfachen Mechanik des Stuhls 10 ermöglicht, durch welche das Untergestell 12 einfach konstruiert werden kann. Es ist ferner möglich, an den horizontalen seitlichen Streben 22 Verbindungsmittel zur jeweiligen Verbindung eines Stuhls 10 mit einem links oder rechts benachbarten Stuhl 10 vorzusehen. Eine solche Stapelung ist auch mit dem Stuhl 100 der ersten Ausführungsform möglich.The present embodiment of the chair 10 allows stacking of a plurality of identical chairs 10 on each other, as in FIG Fig. 13 shown. This is possible due to the very simple mechanism of the chair 10, by which the base 12 can be easily constructed. It is also possible to provide on the horizontal lateral struts 22 connecting means for the respective connection of a chair 10 with a left or right adjacent chair 10. Such stacking is also possible with the chair 100 of the first embodiment.

22 Verbindungsmittel zur jeweiligen Verbindung eines Stuhls 10 mit einem links oder rechts benachbarten Stuhl 10 vorzusehen. Eine solche Stapelung ist auch mit dem Stuhl 100 der erfindungsgemäßen Ausführungsform möglich.Provide 22 connecting means for each connection of a chair 10 with a left or right adjacent chair 10. Such stacking is also possible with the chair 100 of the embodiment of the invention.

In den Fig. 14 und 15 ist erkennbar, wie das Paar von Mittelstreben 48, die sich zwischen der hinteren Querachse 26 und der vorderen Schwenkachse 44 erstrecken, zwischen den Hebeln 28 auf den linken und rechten Seiten des Stuhls 10 verläuft. Jedem der beiden Hebel 28 ist ein Gelenk 38 zur Verbindung mit dem vorderen Teil 30 der Sitzplatte 14 zugeordnet.In the Fig. 14 and 15 It can be seen how the pair of center struts 48 extending between the rear transverse axis 26 and the front pivot axis 44 extends between the levers 28 on the left and right sides of the chair 10. Each of the two levers 28 is assigned a joint 38 for connection to the front part 30 of the seat plate 14.

Die vorstehend beschriebene Mechanik mit den Merkmalen der Sitzplatte 14 und der Rückenlehne 16 und deren Kopplungsmitteln kann relativ preiswert hergestellt werden und eignet sich somit zur Verwendung in Stühlen, die üblicherweise in großer Stückzahl verwendet werden, beispielsweise zur Bestuhlung von Veranstaltungsräumen.The mechanism described above with the features of the seat plate 14 and the backrest 16 and their coupling means can be manufactured relatively inexpensively and is thus suitable for use in chairs that are commonly used in large quantities, for example, for seating event space.

Claims (6)

  1. Chair (100) with a seat section (104), an underframe (102) which supports seat section (104), and a seat back (106), wherein
    - the seat back (106) is mounted on underframe (102) such that it can be pivoted around a rear horizontal transverse axis (120) oriented crosswise to chair (100),
    - and in that seat section (104) is at least partially elastically deformable, characterized In that the seat section (104) is reinforced by at least one stiff supporting element (122) extending from the bottom end of seat back (106) forward in the direction of seat section (104) and being rigidly connected with seat back (106), such that when a pivoting movement of seat back (106) occurs, a portion of seat section (104) positioned in front of the end of supporting element (122) is raised or lowered depending on the direction of pivoting.
  2. Chair of claim 1, characterized in that supporting element (122) reinforces a rear portion of seat section (104) or is formed as one piece with this latter.
  3. Chair of claim 1 or 2, characterized in that a supporting element (122) reinforces each of the two rear corner portions of seat section (104), and in that a central rear portion of seat section (104) positioned between these two corner portions is separated from the corner portions by slots which extend into seat section (104) from seat back (106).
  4. Chair according to one of claims 1 to 3, characterized in that the front end of seat section (104) is rigidly connected with underframe (102).
  5. Chair according to one of claims 1 to 3, characterized in that the front end of seat section (104) rests freely on the front end of underframe (102).
  6. Chair according to one of the preceding claims, characterized in that chair (10, 100) is designed to be stacked on an identical chair (10, 100).
EP15797103.7A 2015-02-19 2015-11-19 Chair Active EP3102069B1 (en)

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WO2022018644A1 (en) 2020-07-22 2022-01-27 Formway Furniture Limited A chair
AU2022226059A1 (en) * 2021-02-24 2023-10-05 Resero IP Limited Improvements to seats

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Also Published As

Publication number Publication date
PL3102069T3 (en) 2019-10-31
EP3102069A1 (en) 2016-12-14
WO2016131504A1 (en) 2016-08-25
WO2016131485A1 (en) 2016-08-25
US11071387B2 (en) 2021-07-27
US20190159596A1 (en) 2019-05-30

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