EP2053941B1 - Convertible seating/lounge chair - Google Patents

Abstract

Most sunbeds or relaxer chairs have a footrest permanently joined to the lateral frame making it difficult to get up or sit down. The footrest (7) of the new design of a relaxer chair can be swiveled into a vertical position around a transversal axis (23). A lever (25) can be used for operating a control mechanism moving the locked seat (5) and backrest (3) into a reclined position. For transport and storage the backrest (3) and the footrest (7) can be folded around horizontal axes (29,41). The rear legs (11) are made of a piece with the armrests (6).

Description

The invention relates to a convertible seat / deck chair according to the preamble of claim 1.

Seating and reclining furniture, which can be adjusted between a sitting and a reclining position, are well known.

A generic sitting / lying furniture is from the DE 295 09 568 U1 known. It is an armchair-like furniture, which consists of two laterally spaced, substantially vertically extending side cheeks, between which a backrest and a seat can be arranged at a predetermined angle to each other and pivoted together about a horizontal pivot axis. During the Verschwenkvorganges from a sitting position in a further folded down lying position a foot located below the seat foot is fully swung out, said foot in the lying position above the seat is positioned in approximately horizontal end position.

The pivoting mechanism has an adjusting lever device, which takes over and controls the pivoting of the foot part during the change in position from sitting to lying down of the seat and back surfaces. This adjusting lever device is, as is apparent in particular by the graphic representation according to the figures, offset from each other on a horizontal plane. To effect the pivoting of the foot part, a dead center position must also be exceeded. An unspecified in this pre-publication line of action, which runs in axial side view of the chair between the foot and the seat part connecting horizontal pivot axis and Fußteilseitigen horizontal support axis, describes between the sitting and the lying position an adjustment of about 150 °.

From the CH 261 314 A is also an adjustable sitting / reclining furniture with fold-in and fold-foot part has become known, however, which requires a completely different adjustment structure for adjusting the foot part. The adjustment of the foot requires a kind of "parallelogram or trapezoidal kinematics" in which the backrest must be pivoted about a tilt axis relative to the seat part to the rear, with an armrest, about which ultimately a connecting link 62 is adjusted with what the footrest is raised or lowered. It is a relatively complex adjustment system, which requires a relative adjustment between the backrest and seat.

According to the FR 798 076 A are a variety of different embodiments of various sitting / lying furniture to take as known. Also in these variants usually parallelogram or trapezoidal or similar Verstellhebelmechanismen be used to transfer the seating / reclining furniture from a sitting in a lying position and raise or lower a seat part hinged to the foot part. It is always necessary that the backrest is brought into different angular position to the seat to carry out the adjustment.

A so far largely comparable solution is also from the EP 1 674 002 A have become known in which the backrest must also be brought back in different relative position to the seat, then to raise or lower a foot part over a comparatively many details and levers comprehensive swivel mechanism. This applies equally to those from the JP 2000 152840 A known construction.

At one of the DE 20 2004 016889 U1 as well as the US Pat. No. 2,890,742 known seating is provided in contrast, that the seat / backrest combination relative to the frame is relatively moved to then raise or lower a Fußteil about a rather parallelogram or trapezoidal adjustment mechanism.

Finally, another one from the FR 635 465 A known seat / deck chair referenced. This known sitting or reclining furniture also has a foot, which is connected to a horizontal pivot axis with a seat part. Furthermore, an adjusting lever device is provided, which has a horizontal support axis is supported pivotably relative to the frame. The opposite end of the adjusting lever device is also supported pivotably via a horizontal support axis on the foot part.

A convertible seating and reclining furniture is for example also from the EP 0 358 666 B1 has become known which comprises a seat part, a backrest and a foot part. The backrest is connected via a horizontal axis with the seat part and the seat part in turn hinged by means of a horizontal axis with the foot part. For example, the seat or reclining furniture can be folded so that the foot part, the seat part and the back rest are virtually parallel to one another.

This seat and reclining furniture can be set up lounge chairs, so bring into a position in which the backrest opposite the seat back runs backwards and the foot part is aligned from the seat back to the ground down. From this position, it can be adjusted to a reclining position, in which the foot part, seat part and backrest come to lie, as it were, in a continuous horizontal plane.

Such a convertible sitting and reclining furniture has proven very successful in practice.

Deviating from this, however, there are in principle other seat / deck chairs.

It has become known a seat-deck chair combination, which comprises a one-piece sitting and lying frames, in which therefore the backrest relative to the seat part and the seat part opposite the foot part assumes a fixed predetermined slightly angular orientation to each other. This one-piece support is pivotable about a single horizontal axis relative to a side pedestal. Such, also known under the term "health loungers" and often found in bathrooms, sanatoria, etc. Lying can now be adjusted by shifting weight, namely from a lying position in which the foot at least approximately horizontally comes to rest in a sitting position, in the the one-piece seat / lying combination is pivoted so far until the leading end of the foot rests on the ground.

An advantage of this design lies in the simple design, since the entire seat-lying surface is connected only to a horizontal axis with the supporting frame around which rotates the chair, so no further pivot axes between the backrest and seat part or seat part and footboard are provided. The disadvantage, however, is in such chairs the entry and exit, especially for the elderly.

Because when boarding you either have to make the legs very wide and come from the front coming backwards over the foot part or trying to get in from the side, which is not easy because of the necessary armrest especially when getting out.

The object of the present invention is therefore to provide an improved seat and deck chair, which can be easily adjusted between a sitting and a lying position and has advantages over conventional solutions in handling.

The object is achieved according to the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

The seat / deck chair invention is distinguished from the generic structure in that the foot of the associated adjustment does not have a dead center, which requires a relatively large displacement. In addition, it is provided that the frame-side horizontal support axis for the intended Verstellhebeneinrichtung for actuating the foot part is disposed below a running through the horizontal support axis horizontal plane. This results in a particularly optimal control of the pivotable foot part, since this construction, the frame-side support axis for the adjusting lever means 25 may be arranged in the immediate vicinity of the horizontal pivot and support shaft about which the seat / reclining construction is pivotable relative to the frame. In accordance with the invention, the adjusting lever device 25 can thus be provided, as it were, virtually in the immediate vicinity of the seating surface, as a result of which pinching and shearing edges are also avoided.

In this case, the construction is such that in the sitting position, the foot part preferably extends vertically downwards, so that it does not interfere with boarding. Since the seat is also preferably located on chair height, you can sit on the inventive seat / reclining furniture as a conventional chair. Subsequently, for example, alone by weight shift the seat / back combination, in the area of the seat around a horizontal axis is held pivotally relative to the frame, are pivoted to the rear. By an inventive lever construction is thereby ensured that not only provided at the transition from the seat to the foot part, the foot part is connected to the seat part horizontal axis is raised, but at the same time the foot part of a rather perpendicular to the ground starting position in the sitting position in a at least approximately horizontal lying position is raised.

To get off the bed can then be pivoted back again in their sitting position, thereby the lying in the lying position approximately horizontally oriented foot again disappears more or less under the seat part, so at least approximately perpendicular from the horizontal axis lying towards the ground, so that a Getting out is easily possible.

Although there are basically also known as "TV armchair", which also allow by weight shift and adjustment of the backrest pivoting of the foot in the raised position. Such sitting / lying furniture, however, have a comparatively complicated adjusting mechanism, often with scissor-type linkages. In contrast, the invention is comparatively simple and only requires a single lever, ie in practice a single lever pair to perform the above-described adjustment. Due to the simple construction principle, the chair / lounger according to the invention can be used primarily for outdoor purposes, for example in the garden or in bathrooms, but also in commercial areas such as latches, indoor pools, etc.

In a particularly preferred embodiment, the adjusting lever extends between the frame and the foot part in an orientation which extends almost congruent to the frame part of the seat part. In other words, the frame-side support point on which the adjusting lever device is articulated is provided in the vicinity of the adjustment axis of the seat part relative to the frame part, preferably in a region below the adjustment axis for the seat surface and / or in a region closer to the foot part.

The leading articulation point of the adjusting lever is likewise preferably located in the vicinity of the horizontal pivot axis connecting the foot part to the seat part. In other words, the leading articulation point of the adjusting lever device (which preferably consists of an adjusting lever pair) is articulated at a location on the foot part, which represents a relatively small dimensioned and over the horizontal pivot axis between the foot and seat part projecting and formed on the foot extension.

In a particularly preferred embodiment, the leading and returning horizontal pivot axis, on which the pivot lever is articulated, arranged so that the connecting line between this front and rear horizontal axis intersects the connecting line between the seat axis relative to the frame rotatably supporting the horizontal axis and the the foot part extends relative to the seat part pivotable horizontal axis.

Too easy especially for tall people To prevent pivoting from one position to the other, may still be provided a friction or clamping or locking mechanism, whereby the bed in the respective position quasi "prefixed" to, as stated, too easy pivoting of the bed alone only to carry out an unintentional weight transfer through the body.

This friction, clamping and / or locking mechanism is preferably pressurized with a spring and circumferentially rotated mutually arranged ribs / recesses, which cooperate with a second correspondingly shaped ribs and recesses having disc, so that when pivoting the seat-lying combination the one Locking part relative to the other against a force spring moved apart and are moved towards each other again when reaching a next locking position, in which the couch is then held by the clamping forces generated thereby.

This latching and / or clamping device can have a ribbed and / or recess structure which has identically designed ribs and / or depressions or differently shaped ribs and / or depressions, so that different clamping forces are generated in the different lying positions. But this has another positive effect. Because the chair according to the invention without appropriate inhibiting or latching mechanism would make a completely different force required for adjusting for different positions. Because when a person is in the lying position, it requires a greater amount of effort to "come up", as in an intermediate position in which the couch exactly in the Libra is located between tilting forward or backward. Here you would need for further adjustment almost no effort. In the sitting position itself, a slightly greater effort is needed to tilt backwards. Ultimately, this always depends on where the center of gravity is in relation to the axis of rotation of the seat. In order to require in all three positions a similar to the same amount of effort to adjust, now the wells in the lying position, for example, have a flat exit to the front to facilitate the process. In the middle position, the depression may have slightly steeper angles to complicate the adjustment somewhat. In this sense, an optimization can be carried out in the desired sense.

Figur 1a :

eine herkömmliche "Gesundheitsliege" nach dem Stand der Technik in einer Sitzpositi- on;

Figur 1b :

eine sogenannte "Gesundheitsliege" nach dem Stand der Technik in einer Liegeposi- tion;

Figur 2 :

eine Seitendarstellung des erfindungsgemä- ßen Sitz-/Liegestuhls in Sitzposition;

Figur 3 :

eine entsprechende Darstellung des in Fi- gur 2 gezeigten erfindungsgemäßen Sitz- /Liegestuhls, jedoch in sogenannter Liege- position;

Figur 4 :

eine Seitendarstellung des in Figur 2 und 3 gezeigten Stuhles im zusammengelegten Zustand;

Figur 5 :

eine schematische Darstellung des anhand von Figur 2 wiedergegebenen erfindungs- gemäßen Sitz-/Liegestuhls;

Figur 6 :

eine schematische Seitendarstellung ent- sprechend der in Figur 3 gezeigten Liege- position des erfindungsgemäßen Sitz-/Lie- gestuhls;

Figur 7 :

eine zu Figuren 5 und 6 entsprechend Dar- stellung in schematischer Wiedergabe drei- er verschiedener Positionen für den erfin- dungsgemäßen Sitz-/Liegestuhl;

Figur 8a und 8b :

eine schematische Seitendarstellung und eine schematische Draufsicht auf eine zu- sätzlich vorgesehene Rasteinrichtung in einer ersten Raststellung;

Figur 9a und 9b :

eine zu Figur 8a und 8b entsprechende Dar- stellung in einer Übergangsposition zwi- schen einer ersten und einer zweiten Rast- stellung;

Figur 10a und 10b :

eine entsprechende Darstellung zu den Fi- guren 8a und 8b bzw. 9a und 9b nach Errei- chen einer zweiten Rastposition;

Figur 11 :

eine vergrößerte Seitendarstellung einer abgewandelten Rasteinrichtung; und

Figur 12 :

eine vergrößerte Detaildarstellung aus Figur 11.

The invention will be explained in more detail with reference to drawings. In detail:

FIG. 1a

a conventional "health bed" according to the prior art in a sitting position;

FIG. 1b

a so-called "health bed" according to the prior art in a lying position;

FIG. 2:

a side view of the inventive seat / deck chair in sitting position;

FIG. 3:

a corresponding representation of the inventive seat / deck chair shown in Figure 2, but in a so-called lying position;

FIG. 4:

a page representation of the in FIG. 2 and 3 shown chair in the folded state;

FIG. 5:

a schematic representation of the basis of FIG. 2 reproduced inventive seat / deck chair;

FIG. 6:

a schematic page representation corresponding to the in FIG. 3 shown lying position of the seat / chair according to the invention;

FIG. 7:

one too FIGS. 5 and 6 as shown in a schematic representation of three different positions for the seat / deck chair according to the invention;

FIGS. 8a and 8b:

a schematic side view and a schematic plan view of an additionally provided locking device in a first detent position;

FIGS. 9a and 9b:

one too FIGS. 8a and 8b corresponding representation in a transition position between a first and a second detent position;

FIGS. 10a and 10b:

a corresponding representation to FIGS. 8a and 8b or 9a and 9b after reaching chen a second detent position;

FIG. 11:

an enlarged side view of a modified locking device; and

FIG. 12:

an enlarged detail FIG. 11 ,

In the FIGS. 1a and 1b a conventional lounger is shown, which has become known as a so-called "health lounger". It comprises a one-piece seat / lying combination 1 with a backrest 3, a seat part 5 and a foot part 7. This seat / lying combination represents a rigid unit, which is usually formed from a surrounding frame, in which a fabric-like, light compliant and / or padded edition is held.

The entire frame is held pivotable about a horizontal support shaft 9 with respect to a frame 11, wherein the frame 11 usually comprises two frame halves 11 'arranged with offset from one another, between which the seat / lying combination 1 is arranged. In other words, the entire sitting / lying surface is connected only via this horizontal support shaft 9 with the frame 11 and held over it.

The frame 11 usually comprises on each side of the sitting / lying combination 1 two feet 13 which offset to achieve a sufficient stability corresponding to far in the longitudinal direction of the chair offset from each other in a floor space, which with appropriate installation of the sitting / lying furniture with the ground 19 coincides.

Alone by shifting weight can now according to the arrow 15 in FIG. 1a the sitting / lying combination of the in FIG. 1a shown seat position are pivoted clockwise about the horizontal support shaft 9, namely until reaching the in FIG. 1b shown lying position in which then the foot part 7 comes to rest in an approximately horizontal raised orientation.

By reversing the weight according to the arrow 17 in FIG. 1b then the chair can be pivoted back until the leading end 7 'of the foot part 7 rests on the floor 19.

In order to facilitate the weight transfer, an armrest 6 connected to the side frame 11 is also provided.

Since the entry and exit is difficult in such a "health bed" because of the ever prominent interfering foot, an improved construction is proposed in contrast, based on the Figures 2 ff. is explained, wherein like reference numerals represent comparable parts.

In the embodiment according to FIG. 2 ff. From the basic construction forth a seat / recliner combination 1 is used, the back part 3 (ie, the backrest 3) and seat part 5 are provided in a predetermined orientation to each other, usually represent a solid or rigid unit or can represent. This seat / Liegekombinltion 1 is in turn about a horizontal support shaft 9 relative to the frame 11, ie the lateral Frame halves 11 ', pivoting and is held over it.

However, the foot part 7 is connected to a horizontal Verschwenkachse 23 with the seat part 5 and relative to the seat part 5 pivotally.

In order to carry out the pivoting of the foot part 7 in dependence on the sitting or reclining position, an adjusting lever device 25 is also provided, which usually consists of a pair of adjusting levers 25 ', wherein each of the two adjusting lever 25' once on the frame side about a horizontal Supporting axis 27 is pivotable, wherein the opposite end of the respective adjusting lever 25 about a Fußteilseitige further horizontal support axis 29 is pivotable.

As can be seen from the schematic page presentation according to FIGS. 5 and 6 results, the adjusting lever-action line 35 is arranged in side view between the two support axes 27 and 29 of the additionally provided adjusting lever 25 and oriented so that this adjusting lever action line 35, the seat axis line of action 33 intersects, which between the seat part 5 pivotally supporting horizontal Support shaft 9 and the seat part 5 and the foot part 7 pivotally supporting each other horizontal pivot axis 23 extends.

Furthermore, in the FIG. 3 also shown a Verschwenklinie or -plane 35, which is hereinafter also partially referred to as Verstellhebel-action line 35, which in side view by the horizontal pivot axis 23 (about which the foot part 7 relative to the seat part 5 pivotally is) and adjacently arranged Horizontalabstützachse 29, on which the leading end of the adjusting lever 25 is articulated extends.

Due to this geometry can now by weight transfer to the back according to the arrow 15 in FIG. 2 the combination of seat and back 5, 3 are pivoted clockwise (with the relative position between the seat and back not changed, since these preferably in a fixed or rigid alignment position to each other, preferably may be formed in one piece). The pivoting movement can be carried out by supporting pushing away on the armrest 6. During the pivoting movement but not only the seat is pivoted about the support shaft 9 in a clockwise direction, but pivoted by the superimposed movement or rotational movement of the adjusting lever 25, the support axis 29 so relative to the horizontal pivot axis 23 in a clockwise direction that upon reaching the so-called reclining position now the horizontal support axis 29 comes to lie to the right of the horizontal pivot axis 23. In other words, with respect to the Verschwenklinie 35 and thus the relative position between the horizontal pivot axis 23 and the horizontal support axis 29, a rotational movement of at least 60 ° and preferably at least 80 °, in particular completed by 90 °, with the result that the foot 7 performs a corresponding pivoting movement. Because in the sitting position according to FIG. 2 the foot part 7 extends at least approximately perpendicular to the bottom 19, whereas in the lying position this foot part 7 is aligned at least approximately horizontally. In this embodiment, therefore, a pivoting movement to just under 90 °, which allows easy entry and exit in the sitting position.

The desired kinematics is thus achieved, inter alia, by the fact that the frame-side support axis 27 comes to rest in a region which is preferably below a horizontal line or plane 37 (FIG. FIG. 3 ) lies. Alternatively or additionally, it proves to be advantageous if the frame-side support axis 27 comes to lie on the side facing the foot part 7 of a vertical line or plane 39, which also extends through the horizontal support shaft 9 ( FIG. 3 ).

The frame-side support shaft 27 may also be supported above the horizontal line 37 on the frame, in particular when the distance between the two support axes 27, 29 and thus the effective length of the pivoting lever 25 is shorter, at least more than 5% and preferably more than 10 % shorter than the effective distance between the horizontal support shaft 9 and the horizontal pivot axis 23 with respect to the seat part. 5

Finally, a favorable kinematics can also be realized if the distance between the supporting shaft 9 fixed on the frame side and the support axis 29 lying adjacent thereto is less than 25%, in particular less than 15%, 10% and in particular less than 8% or even 6% and / or preferably more than 2%, in particular more than 4%, 6%, 8% or 10% of the distance of the support shaft 9 relative to the bottom 19. Same preferred ranges also apply to the distance between the horizontal pivot axis 23 and the support axis 29th

In this arrangement, also proves to be advantageous in aesthetic terms, that the at least one and preferably two side offset provided with pivoting lever 25 'virtually "hidden" behind the frame portion of the seat part 5, so hardly appear in appearance, especially if the respective Adjusting lever 25 'is arranged directly on the inner side of the outer frame portion of the seat part 5.

For pivoting itself, a person sitting on the seat or deck chair can in turn easily rest on the armrests 6, which are designed as extended sections of the side frame halves 11 '.

Based on FIG. 7 is in a single drawing according to the schematic representation of the FIGS. 5 and 6 the seat / deck chair invention shown in its initial position, in its final reclining position and in an intermediate adjustment during the adjustment process to make the adjustment easier to understand.

Finally, in the drawings, especially in the Figures 2 and 3 , Also a horizontal stop axis 65 located, which extends between the two frame halves 11 '. This horizontal axis 65 serves as a stop axis for the backrest 3. As a result, the maximum adjustment is limited in lying position. The stop axis 65 is arranged at such a height on the frame, that in this the lying position limiting end position, the foot part 7 comes to rest horizontally or preferably at least approximately horizontally.

In principle, the backrest 3 can also be pivoted relative to the seat part 5 by a separate mechanism, for which purpose in the drawings according to FIG Figures 2 and 3 a backrest pivot axis 41 is indicated. In this case, a corresponding locking mechanism would also have to be provided. It is also possible in this context that the backrest 3 strikes in the sense of a maximum opening angle relative to the seat part 5 on a rear stop and not further towards the seat part 5 can be opened, but forward to achieve a favorable storage position on the seat part 5 can be pivoted or then transferred.

Preferably, the seat / deck chair described is not daily collapsible camping furniture. However, this chair is preferably collapsible and stowable, for example, in the fall. For this purpose, as mentioned, the backrest 3 can be folded around the aforementioned axis 41 on the seat forward. By, for example, with a tool 127 (in particular a wrench), two screws for the axis 27 are released, the chair can be further folded, as in FIG. 4 can be seen in the page view, in which position then the foot part 7 is parallel to the seat part 5. Since the leading foot or that leading pair of feet can be pivoted about an overhead axis 101 to the rear, the chair, as shown in the side view FIG. 4 can be seen, merged, for example, where he only has a height of about 30 cm and a length of about 120 cm.

Although the described adjustment mechanism easily If necessary, tilting may be too easily effected in large persons, possibly by inadvertent shifting of weight, which may give rise to an unsafe feeling.

Therefore, a gripping and / or latching device 51 may additionally be provided, which is preferably arranged between two veschwenkbaren parts relative to each other. In that regard, is still on the following drawings according to the FIGS. 8a to 12 referenced below.

In particular, the area with respect to the support axle 9 or the horizontal support axle 27 is suitable for this purpose.

It could for example be provided between the inside of a frame half 11 ', for example, the support shaft 9 bearing foot 13 and the outwardly facing adjacent side of the end of the adjusting element 25, a friction, clamping or locking device, the too easy tilting the seat - / lying surface counteracts.

For this purpose, a latching device is preferably proposed, which comprises, for example, a plate-shaped or dividing-shaped clamping or latching half 53, which is provided on the inside of the respective outer frame half, for example in the region of the support axis 27, ie is penetrated by the support axis 27. Here, circumferentially offset and projecting in the axial direction ribs or webs 57 are formed, between which recesses, notches or grooves 59 are provided, wherein between the ribs and depressions beveled inclined surfaces 61 are formed.

At the adjusting lever 25 can now before and after attachment via the horizontal support axis 27, a further engagement projection 65 (or engagement recess or - notch) may be provided, as with the FIGS. 8a to 10b is indicated.

The plate device is finally still by a power spring accumulator 67 according to arrow 68 in FIG. 11 pressurized, which can be supported by a rear support plate 69. This rear support plate 69 is held by an optionally interspersed by the axis 27 sleeve 70.

If the couch is to be changed in its alignment position, then the entire seat-lying surface is pivoted as described with weight shift, whereby the two adjusting lever 25 perform a corresponding rotational movement about the adjustment side horizontal support axis 27. With this adjustment, for example, the projection 59 (or rib 59, etc.) formed on the adjusting lever 25 is then formed out of the recess 59 (formed on the plate-shaped clamping or catching half 53), which is connected to the frame 11 in a rotationally fixed manner. The lifting out of the projection 75 from the recess 59 is carried out in each case via the obliquely mutually inclined surfaces 61, as in the transition from FIG. 8a to FIG. 9a is shown. As a result, the adjusting lever 25 at its rear attachment region on the horizontal support axis 27 against the biasing action of the power spring accumulator 67 against the arrow 68 in FIG. 9a axially adjusted. at Further adjustment is then the engagement projection 65 on reaching a next recess, notch, groove 59, etc. pushed back into this recess, through the power spring accumulator 67, whereby a next detent position of the seat-lying surface is achieved. In this position, in turn, the reclining seat position in the respective position is stabilized according to the spring force.

The magnitude of weight shifting forces that must be applied to effect a positional change ultimately depends on the force storage device 67, i. the clamping force generated thereby as well as the size and height of the engagement projections 67 and the ribs or webs 55 and alignment of the respective slope surface 61st

Based on FIGS. 8a to 10a It is shown that the ribs and webs on the one hand and the depressions, notches, grooves to the other and their height and their inclination surfaces 61 may be the same size. In order to ensure in the different positions that the force required to adjust the chair is about the same, it may be necessary to provide the recesses or the height of the notches and the inclined surfaces with different angles, thereby the desired adjustment in terms of To bring about equalization of the forces required to adjust the chair.

As based on the FIGS. 11 and 12 although it is also shown, the angles α, β or γ may be chosen differently with respect to the different inclination surfaces 61 and also the width 57a of the ribs or webs 57, so that due to the different "extension angles" formed in this way give different resistances when reaching or leaving different seat reclining positions. In other words, to leave a certain selected position then a different force required to perform the adjustment.

Finally, however, even more locking and / or adjusting, for example in the manner of a parking brake possible, for example, to secure a chair in a middle position so that an unintentional adjustment is no longer possible.

• die Klemm- und/oder Rasteinrichtung (51) umfasst zwei Rasthälften (53, 25), von denen eine zumindest einen Eingriffsvorsprung (65) bzw. Eingriffsvertiefung und die andere entsprechend zumindest zwei Eingriffsvertiefungen oder Eingriffsvorsprünge (57, 59) umfasst, wobei bei einer Verstellung des Sitzteils (5) und der Rückenlehne (3) die zusammenwirkenden Rasthälften (53, 25) entgegen einer Kraftfederspeichereinrichtung (67) verstellbar sind,
• die beiden Rasthälften (53, 25) umfassen Rippen oder Stege (57) und/oder eine Vertiefung, Keile oder Nuten (59), die in ihrer Breite und/oder Höhe und/oder bezüglich ihrer Neigungsflächen (61) am Übergang der Vorsprünge oder Vertiefungen gleich dimensioniert sind,
• die beiden Rasthälten (53, 25) unmfassen Rippen oder Stege (57) und/oder eine Vertiefung, Keile oder Nuten (59), die in ihrer Breite und/oder Höhe und/oder bezüglich ihrer Neigungsflächen (61) am Übergang der Vorsprünge oder Vertiefungen zumindest unterschiedlich dimensioniert sind.

With regard to the clamping and / or locking device, reference is made to the fact that this clamping and / or locking device, in addition to the features described above, can also be defined by the following additional features in isolation or together with other features:

• the clamping and / or latching device (51) comprises two latching halves (53, 25), one of which comprises at least one engagement projection (65) or engagement recess and the other correspondingly at least two engagement recesses or engagement projections (57, 59) Adjusting the seat part (5) and the backrest (3), the cooperating latching halves (53, 25) are adjustable against a force spring storage device (67),
• the two ratchet halves (53, 25) comprise ribs or webs (57) and / or a recess, wedges or grooves (59), the width and / or height and / or with respect to their inclination surfaces (61) on Transition of the projections or depressions are the same size,
• the two latching ridges (53, 25) comprise ribs or webs (57) and / or a recess, wedges or grooves (59), the width and / or height and / or with respect to their inclination surfaces (61) at the transition of the projections or Wells are dimensioned at least different.

Claims (15)

1. Convertible upright/reclining chair, having the following features:

   - a backrest (3),

   - a seat part (5),

   - a footrest (7),

   - the backrest (3) is fixed to the seat part (5),

   - the upright/reclining combination (1) comprising the backrest (3), the seat part (5) and the footrest (7) is held on a frame (11) by a horizontal support shaft (9) in the region of the seat part (5),

   - the upright/reclining combination (1) can be pivoted about the horizontal support shaft (9), the relative position of the seat part (5) and the backrest (3) remaining unaltered during the pivoting operation,

   - the footrest (7) is connected to the seat part (5) about a horizontal pivot shaft (23),

   - an adjustment lever means (25) is also provided,

   - the adjustment lever means (25) is supported so as to be pivotable about a horizontal holding shaft (27) with respect to the frame (11),

   - the opposite end of the adjustment lever means (25) is supported so as to be pivotable on the footrest (7) by means of a horizontal holding shaft (29),

   - the frame-side horizontal holding shaft (27) for the adjustment lever means (25) and the frame-side horizontal support shaft (9) for the seat part (5) are arranged on the one hand, and the horizontal holding shaft (29) and the horizontal pivot shaft (23) are arranged relative to the footrest (7) on the other hand, in such a way that in an axial side view, an adjustment lever action line (35) is formed which extends through the pivot shaft (23) connecting the footrest (7) and the seat part (5) and through the footrest-side horizontal holding shaft (29), the adjustment lever action line (35) having an adjustment angle of more than 60° between the upright position and the reclining position thereof,

   characterised by the following features:

   - the maximum adjustment angle of the adjustment lever action line (35) is less than 125°, and

   - the frame-side horizontal holding shaft (27) is located below a horizontal plane (37) extending through the horizontal support shaft (9).
2. Upright/reclining chair according to claim 1, characterised in that the adjustment lever action line (35), and thus the footrest (7), has an adjustment angle of more than 70°, more than 80° or more than 85°, preferably of 90°, between the upright position and a reclining position.
3. Upright/reclining chair according to either claim 1 or claim 2, characterised in that the maximum adjustment angle of the adjustment lever action line (35) and/or of the orientation of the footrest (7) is less than 110°, in particular less than 100°.
4. Upright/reclining chair according to any one of claims 1 to 3, characterised in that the frame-side horizontal holding shaft (27) for the adjustment lever means (25) is located in a region which lies to the side of a vertical plane (39) extending through the horizontal support shaft (9) which side faces towards the footrest (7).
5. Upright/reclining chair according to any one of claims 1 to 4, characterised in that the frame-side horizontal holding shaft (27) lies below a horizontal plane (37) extending through the horizontal support shaft (9).
6. Upright/reclining chair according to any one of claims 1 to 4, characterised in that the seat part (5) and the backrest (3) are provided in a predetermined fixed orientation relative to one another, an shaft (41), by means of which the backrest (3) can be folded onto the seat surface to fold up the upright/reclining chair, being provided between the seat part (5) and the backrest (3).
7. Upright/reclining chair according to any one of claims 1 to 4, characterised in that the frame-side horizontal holding shaft (27) is located above a horizontal plane (37) extending through the horizontal support shaft (9).
8. Upright/reclining chair according to any one of claims 1 to 7, characterised in that in the upright position, the footrest-side horizontal holding shaft (29) of the adjustment lever means (25) is located further than the horizontal pivot shaft (23), connecting the footrest (7) to the seat part (5), from the horizontal support shaft (9) and/or the frame-side horizontal holding shaft (27).
9. Upright/reclining chair according to any one of claims 1 to 8, characterised in that in the reclining position, the footrest-side horizontal holding shaft (29) of the adjustment lever means (25) is located closer than the horizontal pivot shaft (23), connecting the footrest (7) to the seat part (5), to the horizontal support shaft (9) and/or the frame-side horizontal holding shaft (27).
10. Upright/reclining chair according to any one of claims 1 to 9, characterised in that the distance between the horizontal support shaft (9) and the frame-side horizontal holding shaft (27) is less than 25 %, in particular less than 20 %, preferably less than 15 %, 10 % and in particular less than 5 % of the height of the support shaft (9) above a surface (19) on which the frame (11) stands.
11. Upright/reclining chair according to any one of claims 1 to 10, characterised in that the distance between the horizontal pivot shaft (23) and the frame-side horizontal holding shaft (27) is less than 25 %, in particular less than 20 %, preferably less than 15 %, 10 % and in particular less than 5 % of the height of the support shaft (9) above a surface (19) on which the frame (11) stands.
12. Upright/reclining chair according to any one of claims 1 to 11, characterised in that the horizontal pivot shaft (23) connecting the footrest (7) to the seat part (5) is located at a height between the horizontal holding shaft (29) on the footrest (7) and the floor (19).
13. Upright/reclining chair according to any one of claims 1 to 12, characterised in that the adjustment lever means (25) comprises two adjustment levers (25'), which are each located adjacent to and inside the external contour frame halves (11').
14. Upright/reclining chair according to any one of claims 1 to 13, characterised in that a friction, clamping and/or latching means (51) is provided in such a way that the upright/reclining chair is held in the respective upright or reclining position.
15. Upright/reclining chair according to claim 14, characterised in that the friction, clamping and/or latching means (51) is provided between two parts of the upright/reclining chair which can rotate relative to one another, preferably between the clamp lever means (25) and the frame (11), in particular the associated frame half (11').

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