EP0281845A1 - Swivel chair or seat with synchronized inclination of backrest and seat - Google Patents

Abstract

The backrest and seat inclination adjustment device (B) is mounted, seen from the backrest, behind the longitudinal mid-axis of the stand tube (1) so as to be swivellable on an axle (7) of the seat support (A; A'). The seat (3) is connected to the adjustment device (B) in an articulated manner in its rear region and at least one of the swivel points (5', 17) of the seat (3) has a radial clearance in relation to the swivel axle (7) of the adjustment device (B) on the seat support (A; A') so that, when it is adjusted, the seat (3) can execute an angular movement about its attachment point (5; 5', 21) on the seat support (A; A') and a relative movement in relation to the backrest. <IMAGE>

Description

The invention relates to an arrangement for the synchronous adjustment of the inclinations of the seat and the backrest of a swivel chair or armchair consisting of a seat support rigidly attached to the standpipe of the swivel chair or armchair, on which in its front region the seat of the swivel chair or armchair by at least one horizontal axis is pivotally attached, a backrest and seat tilt adjustment device, on the one hand the backrest support of the swivel chair or armchair is attached, and on the other hand is pivotally mounted on the seat support about a horizontal axis, and a locking device for locking the backrest and seat tilt adjustment device out of it Pivotal movement, the locking device on the one hand attached to the backrest and seat inclination adjustment device and on the other hand, as seen from the backrest, is articulated on the seat support in front of the central longitudinal axis of the standpipe of the swivel chair or armchair.

There are swivel chairs and swivel armchairs consisting of a standpipe (possibly with height adjustment for the seat), foot frame, seat support and seat as well as a (optionally height-adjustable) backrest support, the seat about a transverse to the central longitudinal axis Backrest support or the standpipe extending horizontal axis is pivotally arranged below the front region of the seat on the seat support. When the seat is pivoted about the axis after actuation of a release lever, the seat is adjustable in such a way that it is lowered in the front area and raised in the rear area or vice versa, so that the user of the swivel chair or armchair has the desired inclination or inclination of the seat above select the seat support and can lock it again using the release lever. It is also known to fasten the backrest support to the seat support by means of a swivel joint in such a way that the inclination of the backrest can be adjusted when the backrest is pivoted about this pivot point. If, as stated, the inclination of the seat is adjusted while the position or inclination of the backrest remains unchanged, and the user remains leaning against the backrest, tensile or warping forces are exerted by the backrest on the user's clothing, in particular whose back area is exercised - "shirt pull-out effect" - which is perceived as unpleasant and can lead to impairment or even damage to the clothing. In order to counteract this and to ensure that the backrest changes its inclination as synchronously as possible with the adjustment of the inclination of the seat, it is provided in a known swivel chair or armchair that the backrest support is articulated on the seat support by means of a backrest and seat inclination adjustment device. The articulation point of this adjustment device on the seat support is seen from the backrest in front of the central longitudinal axis of the standpipe of the swivel chair in the upper region of the seat support near its upper edge. The desired change in the inclination of the backrest in synchronism with, that is, simultaneously with the adjustment of the inclination of the seat is to be achieved by means of a gas spring which, on the one hand, in the area of the fastening of the adjusting device on the backrest support and, on the other hand, below the articulation point of the adjustment device on the seat support in its area the central longitudinal axis of the standpipe of the swivel chair is articulated. The adjustment of the inclination of the seat is carried out by actuating a release lever, via which the valve of the gas spring is actuated, whereupon the desired adjustment of the inclination of the seat of the swivel chair to the front, the gas spring by means of the pressure that it exerts on the adjusting device and backrest support around the pivot point of the adjusting device on the seat support and thus the seat is pivoted about its axis on the seat support. If the inclination of the seat is adjusted back from a position reached thereby, the valve of the gas spring is also actuated via the release lever, and by simple body pressure of the user against the backrest and possibly the rear area of the seat of the The gas spring is now compressed, causing the adjustment device and backrest support to be pulled against the articulation point of the gas spring on the seat support and thus pivoted back around the articulation point of the adjustment device on the seat support and with which the seat is also pivoted back about its axis on the seat support in the direction of its lowest position in the rear area . In this construction, the inclinations of the seat and backrest are infinitely adjustable in the manner described.

However, it has been shown that this known arrangement for adjusting the inclination of the seat and backrest only reduces the "shirt pull-out effect" mentioned, but does not eliminate it completely or to a negligible extent. If one measures the distance from a point in the central region of the seat to a point in the central region of the backrest of a swivel chair of the type described, this distance increases when the inclinations of the backrest and seat from the outermost front position to the outermost rear position be adjusted, for example from 28 cm to 32 cm, that is to say by a dimension in the order of centimeters, so that the "shirt pull-out effect" mentioned is still present to a considerable extent.

The object of the invention is therefore an arrangement for syn Chronic adjustment of the inclinations of the seat and the backrest of a swivel chair or armchair of the type described in the introduction, with which the tensile forces exerted by the backrest on the user's clothing are completely eliminated or reduced to a negligibly small extent. At the same time, a slimmer design of the adjustment device and the seat support is to be achieved.

According to the invention, this is achieved in that the backrest and seat inclination adjustment device, viewed from the backrest, is pivotably mounted on the seat support behind the central longitudinal axis of the standpipe of the swivel chair or armchair, that the seat of the swivel chair or armchair is articulated in its rear region with the backrest. and seat tilt adjustment device is connected and that at least one of the pivot points of the seat has a radial play with respect to the pivot axis of the backrest and seat tilt adjustment device on the seat support.

Advantageous developments of the invention result from the subclaims.

In particular, the front pivot point of the Seat on the seat support have a radial play with respect to the pivot axis of the backrest and seat inclination adjustment device, that is, be displaceable with respect to this.

However, the rear pivot point of the seat on the backrest and seat recliner may also have radial play with respect to its pivot axis, i.e. be slidable in relation to this.

Furthermore, however, both the front pivot point of the seat on the seat support and the rear pivot point of the seat on the backrest and seat tilt adjustment device can also have radial play with respect to the pivot axis of the backrest and seat tilt adjustment device, i.e. be slidable in relation to this.

The arrangement according to the invention completely or at least almost completely avoids the aforementioned "shirt pull-out effect" when the inclinations of the backrest and seat of the swivel chair are adjusted synchronously. In a swivel chair of the prior art, as stated at the outset, the distance between a point in the central region of the seat and a point in the central region of the backrest increases Adjustment of the inclinations of the backrest and seat from the outermost front position to the outermost rear position by an order of magnitude in centimeters, this distance is due to the arrangement according to the invention for synchronously adjusting the inclinations of the seat and the backrest up to or against zero, yes even below zero, reduced and at most still on the order of millimeters, so that it can be neglected, because a "shirt pulling-out effect" is no longer noticeable.

The arrangement can also be such that the seat of the swivel chair or armchair is preferably connected in its front area to the seat support via a joint arrangement. This ensures that the seat during the adjustment process when executing its pivoting movement around its articulation on the seat support can simultaneously perform a sliding movement to and from the backrest support, by means of which a difference in distance between the backrest support and the seat is completely compensated for and thus achieved that during adjustment the inclinations of the backrest support and seat, the distance between a point of the backrest support and a point of the seat is at least always constant or, as stated, is even reduced to below zero.

The arrangement according to the invention is advantageously designed so that it is in the adjustment of the inclinations of Backrest support and seat allow the seat to pivot about its articulation on the seat support by an angle of approximately 10 °. The ratio of the adjustment of the inclination of the seat to the adjustment of the inclination of the backrest support is preferably 1: 1.68.

By designing the arrangement according to the invention, the overall height of the backrest and seat reclining device and the seat support can each be considerably reduced - from about 120 mm according to the prior art to about 85 mm and even less - so that the desired slimmer design is achieved.

Further details and advantages of the invention are described below with reference to exemplary embodiments shown in the accompanying drawings.

• Fig. 1 ein erstes Ausführungsbeispiel einer erfindungs­gemäßen Anordnung zur synchronen Verstellung der Neigungen des Sitzes und der Rückenlehne in Seitenansicht im Schnitt bei Neigungsverstellung in der äußersten vorderen Position,
• Fig. 2 das Ausführungsbeispiel gemäß Fig. 1 bei Neigungs­ verstellung in der äußersten rückwärtigen Posi­tion,
• Fig. 3 ein weiteres Ausführungsbeispiel einer erfindungs­gemäßen Anordnung zur synchronen Verstellung der Neigungen des Sitzes und der Rückenlehne in Seiten­ansicht im Schnitt bei Neigungsverstellung in der äußersten vorderen Position,
• Fig. 4 das Ausführungsbeispiel gemäß Fig. 3 bei Neigungs­verstellung in der äußersten rückwärtigen Posi­tion und
• Fig. 5 und 6 ein drittes Ausführungsbeispiel einer erfin­dungsgemäßen Anordnung einmal in ihrer äußersten vorderen Position (Fig. 5) und sodann in ihrer äußersten rückwäritigen Position (Fig. 6).

Show it

• 1 shows a first embodiment of an arrangement according to the invention for synchronously adjusting the inclinations of the seat and the backrest in a side view in section with the inclination adjustment in the outermost front position,
• Fig. 2 shows the embodiment of FIG. 1 with inclination adjustment in the outermost rear position,
• 3 shows a further exemplary embodiment of an arrangement according to the invention for synchronously adjusting the inclinations of the seat and the backrest in a side view in section with the inclination adjustment in the outermost front position,
• Fig. 4 shows the embodiment of FIG. 3 with tilt adjustment in the outermost rear position and
• 5 and 6 a third embodiment of an arrangement according to the invention once in its outermost front position (FIG. 5) and then in its outermost rearward position (FIG. 6).

In Fig. 1, the first embodiment of an arrangement according to the invention for the synchronous adjustment of the inclinations of the seat and the backrest is shown schematically in side view of the right side of a swivel chair in section after adjustment of the inclinations to the outermost front position (forward / downward), and in Fig. 2, this embodiment is also shown schematically in side view of the right side of a swivel chair in section, but after adjusting the inclinations from the seat and backrest to the outermost rear position (back / down). In FIGS. 1 and 2, the same reference numerals designate the same parts, so that the following only deals with FIG. 2 insofar as the inclination of the seat and backrest is adjusted to the outermost rear position.

In Fig. 1, 1 denotes the standpipe of a swivel chair which sits with the receiving cone 2 at its upper end in the seat support body A, so that it is rigidly attached to it. As the seat support, the side view of the seat support body A is essentially a pentagon, which predominantly follows the shape of a trapezoid, the upper side (base line) of which is longer than the lower side (base line), which is approximately parallel to it, and one, as seen from the backrest the left (leg) side located on the central longitudinal axis of the standpipe 1 runs approximately at right angles to the upper and lower side, while the right side, viewed from the backrest behind the central longitudinal axis of the standpipe 1, is initially angled in the manner of a trapezoidal leg, but then again in this way to the upper side is angled so that it strikes it at right angles. The seat 3 consisting of a seat shell with a seat cushion resting thereon is in the vertical extension 4ʹ or more of these (in view) by means of the holes (eyes) 4ʺ according to the drawing of consecutive) extensions of a flat iron 4 attached in the front region of the seat 3 on the underside of the seat shell, transversely to the central longitudinal axes of the standpipe 1 and the backrest 6, on the crossbar which runs transversely to the central longitudinal axis of the standpipe 1, near the top right corner of the Seat support body A articulated in this arranged horizontal axis 5, so that the seat 3 is pivotally mounted on the seat support body A to adjust its inclination about this axis 5 as a pivot point.

The backrest support 6 runs at its lower end below the rear region of the seat 3 into the body of the backrest and seat inclination adjustment device B - hereinafter referred to as the adjustment element body B - which is rigidly connected to the end of the backrest support 6 here. In the side view, the adjusting element body B is also essentially a pentagon, which predominantly follows the shape of a trapezoid, with the right (leg) side of the backrest support 6 extending from the seat support body A approximately at right angles to its upper and lower side (base line) - And facing the seat support body A and the other, left side of the shorter side compared to the upper side (base line) lower side to the backrest support 6th and then angled towards the upper side and striking it at right angles. Here, the end of the backrest support 6 bent toward the standpipe 1 is rigidly connected to the end of the adjusting element body B facing it by welding and is thus fastened to it.

On the other hand, the adjusting element body B is by means of bores, which are provided on or in it at the same distance from its top and bottom near its right side, on a parallel to the axis 5 at approximately the same distance from its top and bottom and from the backrest seen behind the central longitudinal axis of the standpipe 1 near or in the central region of the seat support body A, at or near the middle height of the same, extending axis 7, so that the backrest support 6 with the adjusting element body B for adjusting the inclination of the backrest about the axis 7 as a pivot axis is pivotally mounted on the seat support body A.

The locking device 8 for locking the adjusting element body B out of its pivoting movement can be a mechanical or hydraulic locking device. It is shown in the embodiment of FIGS. 1 and 2 as a telescopic arrangement and seen with its one end piece 9 on one of the backrest Articulation point 10 located in front of the central longitudinal axis of the standpipe 1 in the area of the corner between the left and lower side of the seat support body A and articulated on the other hand with its opposite end piece 11 at an articulation point 12 on the adjusting element body B, this articulation point 12 being defined by the Arrow 13 indicated rear end region of the adjustment element body B is located, ie in or near the area of the connection between the adjustment element body B and the end of the backrest support 6. The articulation points 10 and 12 can be formed by axes which run parallel to the axes 5 and 7 in the seat support body A. .

As can be seen from FIGS. 1 and 2, in the area of the standpipe 1 - determined by the articulation points 10 and 7 - the lateral ends of the seat support body A and the adjustment element body B overlap. The axis 7 in the seat support body A lies near the upper end of the standpipe 1 in a plane above the plane in which the axis 10 lies in the seat support body A, the axis 10 also being close to the standpipe 1.

There is no rigid connection between the adjusting element body B and the seat 3 of the swivel chair; rather, this connection is made according to the invention in that in the rear area of the seat 3 on the underside of the seat shell, parallel to the flat iron 4, a flat iron 14 with one or more (in the view according to the drawing one behind the other) vertical extensions 15 is fastened with hole (s) (eyes) 16 for the articulated connection with a protruding into these holes (s) (eyes) 16, at the top of one or a plurality of rod (s) or an arm (or arms) 18 respectively arranged bolts or the like. 17, and the rod (s) or arm (s) 18 is (are) at the opposite lower end pivotable about them on an axis 19 articulated, which runs parallel to the axes 5, 7 and 10 in the seat support body A and to the axis 12 in the adjusting element body B below the locking device 8 near the underside of the adjusting element body B therein.

In the arrangement described above for synchronously adjusting the inclinations of the seat and the backrest, the flat iron 4 is in or near the center of the front half and the flat iron 14 in or near the center of the rear half of the seat 3, in each case parallel to the axes 5, 7 , 10, 12 and 19 trending, each rigidly attached to the underside of the seat 3.

The distance between the pivot points 17 and 19 on the rod (s) or the arm (or arms) 18 on the adjusting element body B is at preferably equal distances from the underside of the seat 3 to the axis 5 and to the bolt 17 (the flat bars 4 and 14 with their extensions 4ʹ and 15 may be identical), chosen so that on the one hand when adjusting the inclination of the backrest support 6 and seat 3 in the outermost rear position (backwards / downwards), which is shown in FIG. 2, the seat 3, which is curved in section when viewed from the side and has a recessed seat in its central region, with or in almost on the upper side of the adjusting element body B when viewed from the side comes in the front area above the standpipe 1 and that, on the other hand, when adjusting the inclination of the backrest support 6 and seat 3 in the outermost front position (forward / downward), which is shown in Fig. 1, the seat 3 at the pivot point on the axis 5 can perform a pivoting about this by an angle of or of approximately 10 ° clockwise and thereby lifts off the adjusting element body B with its central region, but the Adjustment element body B comes in its rear area with its upper side almost in contact with the underside of the rear area of the seat 3, the distance between the adjustment element body B and the underside of the seat 3 being determined only by the thickness of the flat iron 14. These movements are released, for example by pressing a button locking device 8 by shifting the posture of the User of the swivel chair or armchair causes forwards or backwards, so that by means of the pressure exerted by the user adjusting element body B and backrest support 6 about the axis 7 on the seat support body A and thus the seat 3 are pivoted about its axis 5 on the seat support body A.

When the inclination of the backrest support 6 and the seat 3 is reset from this position according to FIG. 1 to the outermost position backwards / downwards according to FIG. 2, the seat 3 becomes counterclockwise about the axis 5 by the angle of or approximately 10 ° pivoted, and this movement is also effected by means of the body pressure of the user against the backrest and possibly the rear area of the seat 3 of the swivel chair when the locking device 8 is released.

It is understood that under body pressure against the backrest and possibly the rear area of the seat 3 when the locking device 8 is released, the inclinations of the seat and the backrest can also be infinitely adjusted in intermediate positions between the two outermost positions shown in FIGS. 1 and 2 , wherein the adjusting element body B is locked in such an intermediate position by lifting the button by the locking device 8.

Because the seat 3 is not rigidly attached to the adjusting element body B in its rear region, the connection between the rear region of the seat 3 and the adjusting element body B is rather between the extension 15 on the flat iron 14 and the adjusting element body B via the extension 15, bolt 17, arm 18 and articulation point 19 formed joint assembly is made, the above-described angular movements of the seat 3 about the axis 5, but at the same time a relative movement of the seat 3 to the backrest support 6 and thus to the backrest is made possible and brought about. The inclination of the seat 3 is not adjusted to the same extent as that of the backrest support 6, rather the ratio of the adjustment of the inclination of the seat 3 to the adjustment of the inclination of the backrest 6 is approximately 1: 1.7, preferably 1: 1.68.

As a result, in the synchronous adjustment of the inclinations of the backrest and seat of the swivel chair, the aforementioned "shirt pull-out effect" is completely or at least almost completely avoided by changing the distance between a point in the middle region of the seat to a point in the middle region of the backrest support when the Inclinations of the backrest and seat from the outermost front to the outermost rear position is reduced to almost zero and is still at most in the millimeter order, so that they ver can be neglected because the "shirt pull-out effect" no longer occurs.

The arrangement according to the invention is characterized by the articulated connections between seat 3, seat support body A and adjusting element body B and by the arrangement of the articulation points. Compared to the swivel chair or armchair of the prior art described in the introduction to the description, in which the articulation point of the backrest and seat inclination adjustment element, seen from the backrest, is located in front of the central longitudinal axis of the standpipe of the swivel chair, this articulation point 7, according to the invention, is behind the backrest the central longitudinal axis of the standpipe 1 and moved deeper on the seat support body A and on the adjusting element body B, thereby preventing the backrest support 6 from lowering backwards / downwards than necessary when the inclination of the seat and backrest into the position back / down, ie the extent of this movement, which is a relative movement to the movement of the seat 3 during the adjustment, is reduced. In this case, a joint triangle is formed between the articulation points 12, 7 and 10, which is required to support the backrest 6 in its volatile position and fulfills this function the cheaper the lower the articulation point 7 is located, ie the more the legs 12, 7 and 12, 10 and 10, 7 of this joint three corners approach each other in the sense of an equilateral triangle.

The favorable relative movement of the seat 3 and the backrest support 6 to one another is caused on the other hand by coupling the rear region of the seat 3 to the adjusting element body B via the joint arrangement 15, 17, 18, 19 described above, the more deeply it performs its function The articulation point of the rod or arm 18 on the axis 19 in the adjusting element body B - with the appropriate length of the rod or arm 18 - can be moved, which is only of the dimensions, ie the height of the adjusting element body B in this area.

Due to its front articulation by means of flat iron 4 with extension 4ʹ and its eye 4ʺ on the axis 5, the seat 3, although rotatable, is mounted on the seat support body A at the articulation point of the axis 5. The rear articulation of the seat 3 on the adjusting element body B, on the other hand, can be rotated at the articulation point 17 by means of flat iron 14 with extension 15 and its eye 16 as well as rod or arm 18 with pin 17 and articulation on the axis 19 via the articulated arrangement 15, 17, 18, 19. articulated as well as displaceable and pivotable according to the movement of the adjusting element body B, so that when the seat 3 is pivoted about the Axis 5 by an angle of approximately 10 ° the desired relative movements of the seat 3 and backrest support 6 can be carried out. The connection between the seat 3 and the adjusting element body B produced by the joint arrangement 15, 17, 18, 19 is dimensioned such that it allows the seat 3 to be pivoted about its bearing on the axis 5 on the seat support body A by an angle of approximately 10 °.

The pivoting movement of the seat 3 about the axis 5 of the seat support body A from the outermost front position according to FIG. 1 to the outermost rear position according to FIG. 2 by the angle of approximately 10 ° is composed of a pivoting movement of approximately 7 ° from the extreme front position to the horizontal and a further pivoting movement of approximately 3 ° to the outermost rear position, and this applies conversely when the seat 3 is pivoted about the axis 5 from the position according to FIG. 2 to the position according to FIG. 1, ie the pivoting movement lies in an angular range between approximately -3 ° to approximately + 7 ° with respect to the horizontal.

3 and 4 show a further exemplary embodiment of an arrangement according to the invention for synchronously adjusting the inclinations of the seat and the backrest, the illustration in FIG. 3 1 and the representation in FIG. 4 corresponds to that in FIG. 2. In FIGS. 3 and 4, the same reference symbols also designate the same parts as in FIGS. 1 and 2, so that reference is made and referred to the description of FIGS. 1 and 2. In the following, FIG. 4 is only discussed in so far as it concerns the adjustment of the inclinations of the seat and backrest to the outermost rear position.

The exemplary embodiment according to FIGS. 3 and 4 differs from the exemplary embodiment according to FIGS. 1 and 2 in the way the articulation of the seat 3 on the seat support body. 3, the seat 3 is connected in the area in or near the middle of its front half via a joint arrangement with the Sitzträgerkörpr Aʹ. This joint arrangement is produced as follows: In the front area of the seat 3, on the underside of the seat shell, parallel to the flat iron 14, the flat iron 4 is fastened with one or more vertical extensions 4ʹ (in the view as shown in the drawing) with a hole (s) ( Eyes) 4ʺ for the articulated connection with a bolt projecting into the bore (s) (eyes) 4ʺ, at the upper end of one or more rod (s) or an arm (or arms) 20 or the like. 5ʹ, and the like Bar (s) or arm (s) 20 is or are on ent opposite lower end pivoted about this on an axis 21 which runs parallel to the axes 7 and 10 in the seat support body Aʹ and to the axes 12 and 19 in the adjusting element body B near the bottom of the seat support body Aʹ and in the position of the device according to FIG. 3 is arranged vertically below the Anlenkstlle 4ʹ, 4ʺ in the seat support body Aʹ. The flat iron 4 with extension or extensions 4 for and eye or eyes 4ʺ is preferably identical in construction to the flat iron 14 and its extension or extensions 15 and eye or eyes 16, and it is the flat iron 4 in or near the middle of the front half of the seat 3 , parallel to the axes 7, 10, 12, 19 and 21, rigidly attached to the underside of the seat 3.

In this embodiment, the side view of the seat support body Aʹ is also still essentially a pentagon starting from the basic shape of a trapezoid, but with the difference from the seat support body A according to FIGS. 1 and 2 that the right side is from the upper side (base line) is angled downwards at right angles and then again somewhat towards the central longitudinal axis of the standpipe 1 and its height almost reaches the height of the left side of the seat retractor Akör, so that its shape in side view according to FIGS. 3 and 4 is already a strong one Rectangle approximated is.

Also for this embodiment of the above-described joint arrangement 4ʺ, 5ʹ, 20, 21 it applies that its articulation point on the axis 21 on the seat support body Aʹ is as low as its overall height allows.

In this embodiment of the arrangement according to the invention, when the inclinations of the seat and the backrest are adjusted from the outermost front position according to FIG. 3 to the outermost rear position according to FIG. 4, the seat 3 is also pivoted by approximately 10 ° (from + 7 ° to -3 ° in relation to the horizontal) instead of, namely around its articulation points 5ʹ and 21, distributed on these, but predominantly about the axis 21, the joint arrangement 4ʺ, 5ʹ, 20, 21 simultaneously a sliding movement of the seat 3 against the backrest support 6 causes. This sliding movement, which in an embodiment according to FIGS. 1 and 2, when adjusting the inclinations of seat 3 and backrest support 6 from the outermost front position to the outermost rear position, may also result in an extension of the distance from a point of the seat 3 to a point of Backrest support 6 is completely avoided and the distance difference that may still occur is compensated for. In addition, however, in this embodiment, the distance between a point in the middle area of the seat 3 and a point in the middle area of the backrest support 6 during the adjustment from the outermost front position to the outermost rear position even reduced to below zero, ie the upper part of the item of clothing or, for example, a shirt, blouse, sweater or jacket, becomes slightly towards pressed or moved against the lower part of a piece of clothing or, for example, trousers or skirt, so that not only does a "shirt pull-out effect" no longer occur, but the user of the swivel chair or armchair also gains additional physical freedom of movement.

When the inclinations of the seat 3 and the backrest support 6 are reset from the outermost rear position according to FIG. 4 to the outermost front position according to FIG. 3, the seat 3 around the articulation points 5ʹ and 21 by about 10 ° (from -3 ° to + 7 ° in relation to the horizontal).

In a practical embodiment, the distance between the central longitudinal axis of the bolt 17 and the underside of the seat 3 and between the central longitudinal axis of the bolt 5ʹ and the underside of the seat 3 is 25 mm (including 5 mm flat iron thickness), while the distance between the central longitudinal axis of the Bolt 17 and the central longitudinal axis of the axis 19 50 mm and the distance between the central longitudinal axis of the bolt 5ʹ and the central longitudinal axis of the axis 21 is 35 mm. The (in any position the Swivel movement constant) distance between the central longitudinal axes of the bolts 17 and 5ʹ of the joint arrangements 16, 17, 18, 19 and 4ʺ, 5ʹ, 20, 21 is 200 mm, while the distance between the central longitudinal axes of the axes 19 and 21 of these joint arrangements in the position 4 is 190 mm and in the position of FIG. 3 is 175 mm. In such an embodiment, the seat 3 can be moved back from the position according to FIG. 3 to the backrest support 6 by 15 mm according to FIG. 4 and back again by 15 mm from the position according to FIG. 4 to that according to FIG. 3 will. MaW the joint arrangements 16, 17, 18, 19 and 4ʺ, 5ʹ, 20, 21 are dimensioned so that the distance difference between seat 3 and backrest support 6 that may occur is at least compensated.

From this it now follows in no way that in the case of the embodiment according to FIGS. 1 and 2 there would always be a distance difference between seat 3 and backrest support 6 which was assumed to be equalized in the embodiment according to FIGS. 3 and 4. Such a, in any case slight, difference in distance can also be compensated for in the exemplary embodiment according to FIGS. 1 and 2 by additional measures, such as, for example, bulging of a lumbar support in the lumbar region of the backrest cushion support or corresponding shaping of the backrest cushion.

5 and 6 show a third exemplary embodiment of an arrangement according to the invention for synchronously adjusting the inclinations of the seat and the backrest of a swivel chair or armchair, the illustration in FIG. 5 being that in FIG. 3 and the illustration in FIG. 6 corresponds to that in Fig. 4. In FIGS. 5 and 6, the same reference symbols also designate the same parts as in FIGS. 3 and 4 and, if appropriate, 1 and 2, so that reference is made and referred to the description of FIGS. 1 to 4.

This third exemplary embodiment differs from the exemplary embodiment according to FIGS. 3 and 4 by the articulation of the seat 3 on the adjusting element body B. According to FIG. 5, the seat 3 is fastened in its rear region by means of the flat iron 14 on the adjusting element body B in such a way that the flat iron 14 on the one hand in or near the center of the rear half of the seat 3, parallel to the axes 5ʹ, 7, 10 and 12, is rigidly attached to the underside of the seat 3 and on the other hand with its vertical extension 15 or extensions 15 with Bore (s) (eyes) 16 for the articulated connection with a horizontal bolt or projecting into this bore (s) (eyes) 16 arranged in the adjusting element body B or the like 17ʹ as an axis, which is also parallel to the axes 5ʹ, 7, 10 and 12 lies, is articulated on the adjusting element body B, so that the seat 3 is pivotally mounted on the adjusting element body B as a pivot point about this (n) bolt or axis 17ʹ when adjusting its inclination. The flat iron 14 with the extension or several extensions 15 lying one behind the other according to the drawing can be identical in construction to the flat iron 4 and 14 (including their extensions 15 and 4ʹ and eyes 16 and 4ʺ) according to FIGS. 1 to 4. In this third embodiment of the invention, rod (s) or arm (s) 18 and an axis 19 such as in the joint arrangement 17, 18, 19 according to FIGS. 1 to 4 are therefore not present, so that the articulation point 17 ′ of the seat 3 is located on the adjusting element body B near its upper edge or side.

Otherwise, the construction in this embodiment of an arrangement for synchronously adjusting the inclinations of the seat and the back of a swivel chair or armchair is the same as in the embodiment of FIGS. 2 and 4, so that for further details reference is made to the description there can be.

However, it should be emphasized that in a practical embodiment of the embodiment according to FIGS. 5 and 6 (corresponding to the embodiment according to FIGS. 3 and 4), the distance between the central longitudinal axis of the bolt 17ʹ and the underside of the seat 3 and between the central longitudinal axis of the bolt 5ʹ and the underside of the seat 3 each also 25 mm (including 5 mm flat iron thickness) and the distance between the central longitudinal axis of the bolt 5ʹ and the central longitudinal axis of the axis 21 in turn 35 mm is. The (constant in each position of the pivoting movement) distance between the central longitudinal axes of the bolts 17ʹ and 5ʹ (the joint arrangement 5ʹ, 20, 21) is 200 mm.

5 in the embodiment according to FIG. 6, the seat 3 in this embodiment can also move back and forth from the position by 15 mm, but here by at least 15 mm to about 23 mm, advantageously also by 17 mm to the backrest support 6 5 of this can be moved back by 15 mm. The joint arrangements 17ʹ and 5ʹ, 20, 21 are in turn dimensioned such that the spacing difference between the seat 3 and the backrest support 6 that may occur is at least compensated.

Furthermore, in this third exemplary embodiment, the seat 3 is moved from the outermost front position in accordance with FIG. 5 to the outermost rear position in accordance with FIG. 6 when the inclinations of the seat and the backrest are adjusted, and in the return from this to the outermost front position in accordance with FIG. 5 also by about 10 ° (from + 7 ° to -3 ° or from -3 ° to + 7 °, in each case based on the horizontal) around the articulation points 5ʹ and 21, distributed over these, but predominantly pivoted about the axis 21. The ratio of the adjustment of the inclination of the seat 3 to the adjustment of the inclination of the backrest 6 is likewise approximately 1: 1.7, preferably 1: 1.68.

However, this shows the following difference between the exemplary embodiment of FIGS. 5 and 6 and that of FIGS. 3 and 4: While in the exemplary embodiment of FIGS. 3 and 4, as already indicated above, in the position of the swivel chair or armchair according to FIG. 3 the side edges (in view according to the drawing on the left and right) of the extension or the extensions 4ʹ and the rod (s) 20 are aligned, in the position according to FIG. 4 the extension or the extensions 4ʹ in relation to the rod or rods (n) 20 but angled towards the backrest and towards the rod (s) 20 (hardly noticeable), in the embodiment of FIGS. 5 and 6 this angling or angling occurs in the position according to FIG. 5, while in the position shown in FIG. 6, the side edges of the extension or extensions 4ʹ and the rod (s) 20 are aligned.

It should also be emphasized that in the practical embodiment of the embodiment according to FIGS. 5 and 6, the distance between a point in the middle loading range of the seat 3 to a point in the central region of the backrest when adjusting the inclinations of the backrest and seat from the outermost front to the outermost rear position also reduced to below zero.

Compared to the prior art, in the exemplary embodiments according to FIGS. 1 to 6, the overall heights of the adjusting element body B and the seat support body A or Aʹ can be considerably reduced from approximately 120 mm to approximately 85 or, if necessary, from the prior art less mm between their upper and lower edges in the area of their greatest overall height. As a result, a slim shape of the adjusting element body B and the seat support body A or Aʹ is achieved, so that this does not appear to be visually or physically disruptive and material is also saved. 3 and 4, the distance between the central longitudinal axis of the axis 19 of the joint arrangement 16, 17, 18, 19 and the lower edge of the adjusting element body B is approximately 10 mm, while the distance between the central longitudinal axis of the axis 21 the joint arrangement 4ʺ, 5ʹ, 20, 21 and the lower edge of the seat support body Aʹ is approximately 15 mm, so that the articulation points 19 and 21 of these joint arrangements on the one hand are sufficiently deep on the adjusting element body B or lie on the seat support body Aʹ, on the other hand, the desired slim design of adjusting element body B and seat support body Aʹ is given. The same applies to the exemplary embodiment according to FIGS. 5 and 6 with the proviso that by eliminating the articulation point 19 according to FIGS. 3 and 4, further freedom for a slimmer design is gained.

Claims (25)

1. Arrangement for the synchronous adjustment of the inclinations of the seat and the backrest of a swivel chair or armchair consisting of a seat support rigidly attached to the standpipe of the swivel chair or armchair, on which in its front region the seat of the swivel chair or armchair about at least one horizontal axis is pivotally mounted, a backrest and seat tilt adjustment device on which the backrest support of the swivel chair or armchair is attached on the one hand and which is pivotably mounted on the seat support about a horizontal axis on the one hand, and a locking device for locking the backrest and seat tilt adjustment device out of its pivoting movement, whereby the locking device is fastened on the one hand to the backrest and seat inclination adjustment device and on the other hand is hinged to the seat support in front of the center longitudinal axis of the standpipe of the swivel chair or armchair as seen from the backrest,
characterized,
that the backrest and seat inclination adjustment device (adjustment element body B) seen from the backrest behind the central longitudinal axis of the standpipe (1) on the seat support (seat support body A, Aʹ) is pivotally mounted that the seat (3) of the rotation Chair or armchair is articulated in its rear area with the backrest and seat inclination adjustment device (adjustment element body B) and that at least one of the pivot points (5ʹ, 17) of the seat (3) has radial play with respect to the pivot axis (7) of the backrests - And seat inclination adjustment device (adjusting element body B) on the seat support (seat support body A, Aʹ). 2. Arrangement according to claim 1, characterized in that the front pivot point (5ʹ) of the seat (3) on the seat support (Aʹ) has a radial play with respect to the pivot axis (7) of the backrest and seat inclination adjustment device (b). 3. Arrangement according to claim 1, characterized in that the rear pivot point (17) of the seat (3) on the backrest and seat inclination adjustment device (B) has a radial play with respect to the pivot axis (7). 4. Arrangement according to claim 1, characterized in that both the front pivot point (5ʹ) of the seat (3) on the seat support (Aʹ) and the rear pivot point (17) of the seat (3) on the backrest and seat inclination adjustment device (B) radial play with respect to the pivot axis (7) of the back have backrest and seat reclining device (B). 5. Arrangement according to one of claims 1 to 4, characterized in that the radial play is given by a joint arrangement (17, 18, 19 and / or 5ʹ, 20, 21). 6. Arrangement according to claim 5, characterized in that the hinge arrangement consists of a hinge rod (18 or 20), with one end at the relevant pivot point (17 or 5ʹ) of the seat (3) and with its other end at a vertical underlying pivot point (19 or 21) is articulated on the backrest and seat inclination adjustment device (B) or the seat support (A, Aʹ). 7. Arrangement according to one of claims 1 to 6, characterized in that the bearing point or pivot axis (7) of the backrest and seat inclination adjustment device (B) on the seat support (A, Aʹ) in a plane above the articulation point (10) between the seat support ( A, Aʹ) and the locking device (8, 9, 11) for locking the backrest and seat reclining device (B). 8. Arrangement according to claim 7, characterized in that the bearing point or pivot axis (7) of the backrest and seat inclination adjustment device (B) on the seat support (A, Aʹ) lies in one plane at a clear distance from the underside of the seat (3). 9. Arrangement according to claim 7 or 8, characterized in that the bearing point or pivot axis (7) of the backrest and seat inclination adjustment device (B) on the seat support (A, Aʹ) approximately half the height of the backrest and seat inclination adjustment device (B) and the seat support (A, Aʹ) lies. 10. Arrangement according to one of claims 7 to 9, characterized in that the bearing point or pivot axis (7) of the backrest and seat inclination adjustment device (B) is close to the upper end of the standpipe (1). 11. Arrangement according to one of claims 1 to 10, characterized in that the articulation point (10) between the seat support (A, Aʹ) and locking device (8, 9, 11) for locking the backrest and seat inclination adjustment device (B) on the seat support (A , Aʹ) is near the standpipe (1). 12. Arrangement according to one of claims 5 to 11, characterized in that the joint arrangement between the seat (3) and the backrest and Sitzneigungsver Adjusting device (B) and / or the seat support (A, Aʹ) is made by an extension or extensions (15 or 4ʹ) on the underside of the seat (3), each with articulated rod (s) or arm (s ) (18 or 20) is articulated (16, 17 or 4ʺ, 5), which is articulated at the opposite end with the backrest and seat recliner (B) and / or the seat support (A, Aʹ) articulated ( 19 or 21) is or are connected. 13. Arrangement according to one of claims 5 to 12, characterized in that the articulation point (19 and / or 21) of the joint arrangement (s) (17, 18, 19 and / or 5ʹ, 20, 21) on the backrest and seat reclining device (B) and / or the seat support (A, Aʹ) is set as low as their height allows. 14. Arrangement according to one of claims 1 to 13, characterized in that the front pivot point (5 or 5ʹ) of the seat (3) in or near the center of the front half of the seat (3). 15. Arrangement according to one of claims 1 to 14, characterized in that the rear pivot point (17 or 17ʹ) of the seat (3) is in or near the center of the rear half of the seat (3). 16. Arrangement according to one of claims 1 to 15, characterized in that the pivot points (17 or 17ʹ and 5 or 5ʹ) of the seat (3) and the pivot axis (7) of the backrest and seat inclination adjustment device (B) positioned to each other and by the joint arrangement (s) (5ʹ, 20, 21 and / or 17, 18, 19) can be moved relative to one another in such a way that the seat (3) and backrest (6) are pivoted synchronously, but with a different pivoting angle. 17. The arrangement according to claim 16, characterized in that the backrest (6) is pivotable by a larger angle than the seat (3). 18. Arrangement according to claim 16 or 17, characterized in that the seat (3) is pivotable by 10 ° about its front pivot point (s) (5 or 5ʹ, 21). 19. Arrangement according to one of claims 16 to 18, characterized in that the ratio of the pivot angle of the seat (3) and backrest (6) is approximately 1: 1.7. 20. Arrangement according to one of claims 16 to 18, characterized in that the ratio of the pivot angle of the seat (3) and backrest (6) is 1: 1.68. 21. Arrangement according to one of claims 1 to 20, characterized characterized in that the synchronous pivoting movement of the backrest and seat inclination adjusting device (B) and the seat (3) of the distance from a point of the backrest (s) (6) to a point of the seat (3) is constant in any position of the pivoting movement. 22. Arrangement according to one of claims 1 to 21, characterized in that the overall height of the seat support (A, Aʹ) and the backrest and seat inclination adjustment device (B) is in each case less than 100 mm. 23. Arrangement according to one of claims 1 to 22, characterized in that the overall height of the seat support (A, Aʹ) and the backrest and seat inclination adjustment device (B) is in each case less than 90 mm. 24. Arrangement according to one of claims 1 to 23, characterized in that the overall height of the seat support (A, Aʹ) and the backrest and seat inclination adjustment device (B) is each about 85 mm. 25. Arrangement according to one of claims 1 to 24, characterized in that the overall height of the seat support (Aʹ) and / or the backrest adjustment device (B) is less than 85 mm.

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