EP2679211B1 - Seating furniture with an aid for standing up - Google Patents

Description

The present invention relates to a chair, in particular a chair or chair, according to the preamble of claim 1.

Seating of the type in question are furnishings and serve to accommodate a person or several people, especially sitting. Some such seating also allow at least partial lying or lying down. Generic seating can indoor, such. B. in living rooms and business premises, and / or outdoors, such. B. in gardens, are used. Such chairs include in particular armchairs, chairs, stools, benches, sofas, beach chairs and swings.

A generic seating is from the DE 20 2010 005 963 U1 known. The known seating furniture has two lateral armrests, each with a recess. The two armrests laterally limit a seat of the chair.

The known seating also has a stand-up aid device, with the help of the seating from a sitting position in a stand-up auxiliary position and vice versa adjustable. The adjustment of the chair from the sitting position in the standing-up auxiliary position or vice versa serves to assist a user when getting up or sitting down.

The Aufstehhilfsvorrichtung the known chair has an actuator and an actuating mechanism. The adjusting mechanism comprises a pedestal, a support frame, several guide levers and several traverses. The pedestal has two foot elements, which, at least in the stand-up auxiliary position of the seat, at least partially rest on a standing surface.

The actuator can be controlled by a user. By means of the actuating mechanism driven by the actuator, the seat is raised or lowered relative to the foot elements and thereby adjusted from the sitting position to the standing-up auxiliary position and vice versa.

In the known seating is now provided that in the sitting position of the chair, the foot elements are at least partially positioned within each one of the recesses.

However, the adjusting mechanism and the actuator are arranged in the known seating in the space below the seat between the two armrests. In particular, the actuator is positioned centrally in the direction of the seat width as well as in the direction of the seat depth below the seat. In the direction of the seat height, the actuator extends from the floor space to just below the seat.

Furthermore, parts of the adjusting mechanism, in particular a plurality of cross members, and parts of the pedestal, in particular a foot cross member, extend in the direction of the seat width between the two armrests. Further parts of the adjusting mechanism, in particular a plurality of guide levers and support profiles, and further parts of the pedestal, in particular a plurality of holding plates are arranged in the region of the mutually facing inner sides of the armrests, but outside the armrests.

Overall, therefore, the actuator, the adjusting mechanism and parts of the pedestal of the known chair are positioned in the space below the seat between the two armrests.

Object of the present invention is to improve the known seating with respect to the arrangement and design of the Aufstehhilfsvorrichtung.

The above-described task is solved by the chair according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

It goes without saying that embodiments, embodiments, advantages u. Like., Which are given below for purposes of avoiding repetition only to one aspect of the invention, apply mutatis mutandis in relation to the other aspects of the invention.

Having said that, the present invention will be described in more detail below.

The basic idea of the present invention is to integrate the actuator or the actuators and at least parts of the control mechanism in the two armrests.

The built-in armrests components of the stand-up aid are, at least in the seating position of the chair, not visible to a user. This improves the visual impression or creates a pleasing impression, even if no screens are installed.

Due to the inventive arrangement of the actuator or the actuators and the adjusting mechanism are deposited on the built-in armrests components of the Aufstehhilfsvorrichtung no dirt particles from or the deposition of dirt particles is reduced to these components. Thus, the effort for cleaning and / or care of the chair is reduced.

Furthermore, the integrated into the armrests components of the Aufstehhilfsvorrichtung for a user, at least in the seating position of the chair, typically not accessible. As a result, injuries, in particular bruises, can be prevented or reduced and the reliability can be increased. On the installation of an intervention protection can be omitted.

Overall, the design freedom increases when designing the chair.

The structural design of the Aufstehhilfsvorrichtung can take very different forms. There must be at least one actuator.

If only one actuator is present, then this is to be arranged in a recess of one of the two armrests. Then, a first part of the actuating mechanism is arranged in this recess. In addition, the adjusting mechanism then has a drive connection from the recess in an armrest in the recess of the other armrest. There, the drive connection is connected to a further part of the adjusting mechanism in the recess of the other armrest.

But it is also possible to equip each of the two armrests with a complete, complete unit of actuator, adjusting mechanism and base support. In this case, the drive connection between the parts of the control mechanism in the two armrests can be omitted.

The term "seat", as used in the context of the present invention, refers to the area of the seat that is at least mainly intended to serve as seating, that is designed so that one person or several persons can sit on it. The seat can also be designed such that one person or several persons can assume a lying and / or a half-lying posture. The seat may be upholstered and / or one or more cushions and / or seat cushions may be disposed on the seat.

In the context of the present invention, the seat is characterized by the dimensional terms "seat width", "seat depth" and "seat height". To explain these terms, see below Fig. 1 the drawing reference. In relation to Fig. 1 the drawing is the term "seat width" the horizontal extent of the seat, with the term "seat depth" meant the extension into the plane of the drawing and the term "seat height" the vertical distance of the seat to the floor space.

For the purposes of the present invention, the term "armrest" is to be understood as meaning those components of the seat which have the seat on one side, in FIG Fig. 1 limit left or right, in width, but do not belong to the backrest. The armrests extend in the direction of the seat height starting from the seat to an area below the seat, in particular up to the base. The armrests may extend upwards beyond the seat in the direction of the seat height. In this case, the armrests can each form an armrest at an upper end. In the direction of the seat depth, the armrests can extend over the entire seat depth or part of the seat depth or also protrude beyond the seat. The armrests can be designed so that the seat partially protrudes into them.

The term "sitting position" as used in the present invention means a position of the chair in which the seating is for the purpose of sitting, lying down or half-fulfilled. Typically, the seat in the sitting position is oriented substantially horizontally in the direction of the seat depth. The sitting position represents the basic position of the chair.

The term "stand-up assist position" as used in the present invention is to be understood to mean that the seat occupies a position such that a user occupies a more upright position than sitting, lying down or lying down. The stand-up auxiliary position can be designed so that the user stands (almost) upright in this position. Typically, the seat is raised in the standing-up auxiliary position, ie raised in the direction of the seat height, and / or tilted forward or inclined downwards in the direction of the seat depth.

The term "control mechanism" in the case of the present invention, those components of the stand-up aid to understand the transmission of the force exerted by the actuator, serve on the seating, and the components of the stand-up auxiliary device, which support the operation of these power transmitting components.

The term "actuator" in the context of the present invention refers to those components of the stand-up auxiliary device, which serve to generate the energy for power transmission to the seating. The actuator can operate in a pneumatic, hydraulic or electrical manner. The actuating movement of the actuator can be performed in a straight line, pivoting or rotating.

The invention will be explained in more detail with reference to the explanation of preferred embodiments with reference to the drawings. The features described above and / or disclosed in the claims and / or in the following description of the figures may, if necessary, be combined with one another, even if this is not expressly described in detail.

Fig. 1

schematisch eine Frontansicht einer ersten bevorzugten Ausführungsform des erfindungsgemäßen Sitzmöbels in einer aus einer Sitzposition angehobenen Position,

Fig. 2

schematisch eine in Richtung der Sitztiefe verlaufende Ansicht einer zweiten bevorzugten Ausführungsform des erfindungsgemäßen Sitzmöbels in einer aus der Sitzposition angehobenen Position, wobei zugunsten der Übersichtlichkeit die Außenwandung der Armlehne weggelassen wurde,

Fig. 3

in einer Fig. 2 ensprechenden Darstellung eine dritte bevorzugte Ausführungsform des erfindungsgemäßen Sitzmöbels in der Sitzposition,

Fig. 4

schematisch eine Frontansicht des Sitzmöbels gemäß Fig. 3 sowie einen Teilschnitt entlang der Linie IV/IV in Fig. 3, wobei sich dieser Teilschnitt lediglich über die Höhe der Ausnehmungen in Fig. 4 erstreckt,

Fig. 5

in einer Fig. 3 entsprechenden Darstellung die dritte bevorzugte Ausführungsform des erfindungsgemäßen Sitzmöbels in einer aus der Sitzposition angehobenen Position,

Fig. 6

schematisch eine Frontansicht des Sitzmöbels gemäß Fig. 5 sowie einen Teilschnitt entlang der Linie VI/VI in Fig. 5, wobei sich dieser Teilschnitt lediglich über die Höhe der Ausnehmungen in Fig. 6 erstreckt,

Fig. 7

in einer Fig 3 entsprechenden Dasrstellung die dritte Ausführungsform des erfindungsgemäßen Sitzmöbels in einer Aufstehhilfsposition,

Fig. 8

schematisch eine Frontansicht des Sitzmöbels gemäß Fig. 7 sowie einen Teilschnitt entlang der Linie VIII/VIII in Fig. 7, wobei sich dieser Teilschnitt lediglich über die Höhe der Ausnehmungen in Fig. 8 erstreckt.

In the drawing shows

Fig. 1

FIG. 2 schematically a front view of a first preferred embodiment of the seat according to the invention in a position raised from a sitting position, FIG.

Fig. 2

FIG. 2 schematically a view, extending in the direction of the seat depth, of a second preferred embodiment of the seat according to the invention in a position raised from the sitting position, wherein the outer wall of the armrest has been omitted for the sake of clarity;

Fig. 3

in a Fig. 2 ensprechenden representation of a third preferred embodiment of the seat according to the invention in the sitting position,

Fig. 4

schematically a front view of the chair according to Fig. 3 and a partial section along the line IV / IV in Fig. 3 , wherein this partial section only over the height of the recesses in Fig. 4 extends

Fig. 5

in a Fig. 3 corresponding representation of the third preferred embodiment of the seat according to the invention in a raised position from the sitting position,

Fig. 6

schematically a front view of the chair according to Fig. 5 and a partial section along the line VI / VI in Fig. 5 , wherein this partial section only over the height of the recesses in Fig. 6 extends

Fig. 7

in a Fig. 3 corresponding Dasrstellung the third embodiment of the seat according to the invention in a stand-up auxiliary position,

Fig. 8

schematically a front view of the chair according to Fig. 7 and a partial section along the line VIII / VIII in Fig. 7 , wherein this partial section only over the height of the recesses in Fig. 8 extends.

Fig. 1 schematically shows a front view of a first preferred embodiment of a seat according to the invention 1 in a raised position from a sitting position.

The chair 1 has two lateral armrests 2, each with a recess 3, a seat 4 and a backrest 5. The backrest 5 extends from the seat 4 substantially in the direction of the seat height, in Fig. 1 So vertical, upwards. The two armrests 2 are laterally, in Fig. 1 left and right of the seat 4 and the backrest 5 are arranged. In this respect, the armrests 2 limit the seat 4 in its seat width. The armrests 2 each have an armrest 6 at an upper end.

On the seat 4 and in front of the backrest 5 upholstery 7 are arranged. The seat 4 and the backrest 5 can be connected to each other permanently and thereby rigid or movable to each other. Preferably, the seat 4 and the backrest 5 are designed such that the inclination of the backrest 5 relative to the seat 4 is individually adjustable for a user. The seat 4 and the backrest 5 may also be formed as a one-piece, solid overall structure.

At the in Fig. 1 illustrated and preferred embodiment, the recesses 3 are quasi designed as a hollow of the originally designed as Vollwandungen armrests 2. In the direction of the seat height, the recesses 3 extend from just above the seat 4 completely to the lower end of the respective armrest 2, so that the armrests 2 are each at least partially open on their underside and the recesses 3 are at least partially accessible from the outside.

The chair 1 also has an in Fig. 1 schematically and simplified stand-up assistance device in the form of two units 8, with the help of the seating 1 from the sitting position in a stand-up auxiliary position and vice versa adjustable.

The chair 1 has two base support 9, which in the raised position of in Fig. 1 illustrated embodiment of the chair 1 rest on a base 10 and thereby form a pedestal of the chair 1. As in Fig. 1 can be seen, the base support 9 in the direction of the seat width narrower than the recesses. 3

At the in Fig. 1 illustrated embodiment, the seating 1 is raised by means of the Aufstehhilfsvorrichtung 8 relative to the base supports 9 and thereby adjusted from the sitting position to a raised position. However, this raised position does not correspond to the stand-up auxiliary position. Rather, this raised position represents an intermediate position between the sitting position and the standing-up auxiliary position.

At the in Fig. 1 illustrated embodiment, the Aufstehhilfsvorrichtung is arranged in the form of two units 8 in the two recesses 3 of the armrests 2. Each unit 8 is connected to a base support 9.

At the in Fig. 1 illustrated embodiment, no components of the Aufstehhilfsvorrichtung are arranged in the space below the seat 4 between the two armrests 2. For a user, therefore, at least in the sitting position of the chair 1, from the outside no components of the Aufstehhilfsvorrichtung visible. The installation of screens or an intervention protection can be omitted in this preferred embodiment, without disturbing the visual impression.

On the components of the Aufstehhilfsvorrichtung can, at least in the sitting position of the chair 1, no dirt particles deposit. Below the seat 4 between the two armrests 2 is one of the design freedom underlying, large space.

Preferably, with the help of the standing-up auxiliary device, the seating 1 can be moved from the sitting position into a position raised in the direction of the seat height, as shown in FIG Fig. 1 is shown as an example, adjusted and held at least temporarily, so that a user can sit or lie in this raised position on the chair 1. In other words, the seat height of the seat 1 can preferably be adjusted with the aid of the stand-up auxiliary device.

As already mentioned in the general part of the description, one can realize the Aufstehhilfsvorrichtung the chair in many different constructive ways. Fig. 1 The drawing shows only the basic principle of the arrangement of the components of the Aufstehhilfsvorrichtung 8 in the two Armrests. The statements in the general part of the description can be made here for the sake of simplicity.

Fig. 2 schematically shows a running in the direction of the seat depth view of a second preferred embodiment of the seat 1 according to the invention in a raised position from the sitting position. For the sake of clarity, the outer wall of the armrest 2 has been omitted, so that the recess 3 of the armrest 2, a part of the standing-up auxiliary device arranged therein and the base support 9 are visible.

In comparison to Fig. 1 is in the embodiment in Fig. 2 a second preferred embodiment of the Aufstehhilfsvorrichtung 8 and the base support 9 shown. The other components of the chair 1 are as in the first embodiment according to Fig. 1 educated.

At the in Fig. 2 illustrated and preferred embodiment, the stand-up auxiliary device in each armrest 2 an actuator 11 and an actuating mechanism 12.

The actuator 11 according to Fig. 2 is designed as an electric actuator 11 with an electric motor 13 and a threaded spindle 14.

Each adjusting mechanism 12 according to Fig. 2 has a Armlehnträger 15, which is arranged in the recess 3 of the armrest 2.

At the in Fig. 2 illustrated and preferred embodiment, it is now so that each armrest 2 is assigned a complete unit 8 of an actuator 11, a control mechanism 12 and a base support 9. In this case, each unit 8, at least in the sitting position of the seat 1, is arranged in the recess 3 of the associated armrest 2. The two units 8 are essentially identical.

It is preferred if each unit 8 is completely removable from the recess 3 of the armrest 2, in particular pulled out. Like a cartridge you can use the unit 8 in the armrest 2. Due to the inherent weight of the chair 1, the unit 8 normally stabilizes in the recess 3 the armrest 2 by itself. Thus, the unit 8 need not even be anchored in the armrest 2 with special fastening means such as fastening screws. Of course, it is possible that such an anchoring of the unit 8 takes place in the armrest 2.

Another advantage of this arrangement is that you can deliver the chair 1 optionally without Aufstehhilfsvorrichtung or with Aufstehhilfsvorrichtung without a buyer noticed externally a difference. Technically, this flexibility is of course very useful.

Said embodiment makes it possible to produce a plurality of identical units 8, to provide for each chair 1 two of these identical units 8 and then to arrange a unit 8 in each case a recess 3 of the armrests 2 in the same manner.

The above statements have already made it clear that normally in each case the recess 3 in the armrest 2 is at least partially open at least to the standing surface 10. As a result, the base support 9 can stand on the standing surface 10 when the chair 1 is raised, while the respective armrest 2 moves away from the standing surface 10 towards the top.

At the in Fig. 2 illustrated and preferred embodiment, the base support 9 of each unit 8 on a gate 16. The Armlehnträger 15 each unit 8 is connected to the associated armrest 2 and guided over two superimposed rollers 17 movable in the link 16. It is also possible to use more than two rollers 17. As an alternative to the rollers 17 and sliding elements can be used.

At the in Fig. 2 illustrated and preferred embodiment extends the Armlehnträger 15 substantially adjacent to the gate 16, in a front view so behind the gate 16. In the area of the rollers 17, the armrest carrier 15, however, a projection or offset on which the rollers 17 are attached. This projection extends into Fig. 2 essentially behind the scenery 16, in a front view thus left next to the scenery 16.

The gate 16 is in an end-side area, in Fig. 2 bent at its upper end, directed towards the seat depth of the chair 1 from the seat 4 away.

On the armrest support 15 and the base support 9, the actuator 11 of the unit 8 is articulated such that an extension of the actuators 11 of both units 8 causes lifting of the armrest carrier 15 of both units 8, whereby the seating 1 from the sitting position to a raised position, such as in Fig. 2 shown, is adjustable. The rollers 17 can be performed during the extension of the actuators 11 through the scenes 16 so long parallel until the upper rollers 17 reach the curved parts of the scenes 16 and the seating 1 thus reaches a maximum raised position. In the adjustment range between the sitting position and the maximum raised position so a substantially vertical adjustment of the chair 1 is possible. Thus, a seat height adjustment of the chair 1 can be realized by the user.

The armrest carrier 15 is pivotable about an axis extending in the direction of the seat width of the seat 1 through the lower roller of the rollers 17. Now, if the actuators 11 of the two units 8 further extended to its upper end position, each moves the upper roller of the rollers 17 in the curved portion of the link 16. This pivots the Armlehnträger 15 about the axis through the lower roller 17 and the role Seating 1 swings or tilts forward. Now, the chair 1 is in the stand-up position.

From the stand-up auxiliary position, the seat 1 can be pivoted or tilted back into the maximum raised position by the actuators 11 of the two units 8 are retracted from its upper end position until each of the upper roller 17 leaves the curved portion of the gate 16. If the actuators 11 of the two units 8 further retracted, the rollers 17 are guided by the gate 16 so long in parallel down until the respective lower role of the rollers 17 a lower end of the link 16 and the seating 1 thus reaches the sitting position. In this way, therefore, the seating 1 can be adjusted from the stand-up auxiliary position in the sitting position.

It is clear from the above explanations that the link 16 of a unit 8 is functionally associated with the actuating mechanism 12 of this unit 8.

This embodiment of the units 8 saves space, in particular, each unit 8 is very narrow in the direction of the seat width. This allows a sufficient freedom of design with respect to the armrests 2 despite integration of the units 8 in the armrests 2. At the same time can be realized by this design of the units 8 is a cost-effective, low maintenance, reliable and / or comfortable seating 1 with stand-up.

At the in Fig. 2 illustrated and preferred embodiment, the adjusting mechanism 12 is arranged in the recess 3, that when driving the actuating mechanism 12 by means of the actuator 11 is a force transmission from the adjusting mechanism 12 to the armrest 2. For this purpose, the armrest carrier 15 is firmly connected to the upper side of the recess 3 with the associated armrest 2 or the armrest 2 rests on the armrest carrier 15.

Preferably, the standing-up auxiliary device 8 has an electronic control unit, not shown, which controls the two actuators 11. It is particularly preferred if the electronic control unit synchronizes the two actuators 11, that is, carries out a control. It has proved to be advantageous if the electronic control unit, at least in the sitting position of the seat 1, is arranged in one of the recesses 3.

Fig. 3 shows in one Fig. 2 corresponding representation of a third preferred embodiment of the seat 1 according to the invention in the sitting position.

Fig. 4 schematically shows a front view of the chair according to Fig. 3 and a partial section along the line IV / IV in Fig. 3 , wherein this partial section only over the height of the recesses 3 Fig. 4 extends.

The third preferred embodiment according to 3 and 4 differs from the second embodiment according to Fig. 2 in the embodiment of the actuator 11 and the adjusting mechanism 12. The other components of the chair 1 are as in the second embodiment according to Fig. 2 educated.

Compared to the in Fig. 2 illustrated embodiment, the adjusting mechanism 12 of each unit 8 of the chair 1 according to 3 and 4 in addition to a lever handle 18. Unlike the in Fig. 2 illustrated embodiment are in the seating 1 according to 3 and 4 the lever arm 18 on the armrest carrier 15 and the base support 9 and the actuator 11 articulated to the lever link 18 and the base support 9 such that an extension of the actuators 11 of both units 8 causes lifting of the armrest support 15 of both units 8. As a result, the seating 1 is adjustable from the sitting position into a raised position or, upon extension of the actuators 11 of both units 8 to its upper end position, into the standing-up auxiliary position.

At the same time the lever arm 18 is hinged to the armrest carrier 15 and the base support 9 and the actuator 11 of the unit 8 to the lever link 18 and the base support 9 such that retraction of the actuators 11 of both units 8 causes a lowering of the armrest support 15 of both units 8. As a result, the seating is adjustable from the stand-up auxiliary position or a raised position down to the sitting position.

This embodiment of the two units 8 allows due to the translation effect, the realization of a particularly space-saving and / or particularly stable Aufstehhilfsvorrichtung.

In the in 3 and 4 shown seat position of the chair 1, the armrests 2 can rest on their respective underside on the base 10, in which case the base support 9 are arranged in the respective recess 3, without touching the base 10. But it is also possible that in the sitting position of the chair 1, the base support 9 protrude at least partially from the respective recess 3 and at least partially rest on the base 10.

Fig. 5 shows in one Fig. 3 corresponding representation of the third preferred embodiment of the seat 1 according to the invention in a raised position from the sitting position.

Fig. 6 schematically shows a front view of the chair according to Fig. 5 and a partial section along the line VI / VI in Fig. 5 , wherein this partial section only over the height of the recesses 3 Fig. 6 extends.

In the in FIGS. 5 and 6 shown raised position, the seat 4 is in a vertical, ie in the direction of the seat height, greater height than in the 3 and 4 shown sitting position of the chair 1.

Here it can be seen that parts of the base support 9 and the two actuators 11 protrude partially on the underside of the respective armrest 2 from the recess 3. In addition, goes out FIGS. 5 and 6 show that in this embodiment, in the illustrated raised position, only the base support 9 rest on the base 10.

Fig. 7 shows in one Fig. 3 corresponding representation of the third preferred embodiment of the seat 1 according to the invention in the stand-up auxiliary position. Fig. 8 , schematically shows a front view of the chair according to Fig. 7 and a partial section along the line VIII / VIII in Fig. 7 , wherein this partial section only over the height of the recesses 3 Fig. 8 extends.

At the in FIGS. 7 and 8 illustrated embodiment, the actuators 11 are fully extended, so they are in their upper end position. Here is the upper roller of the rollers 17 at the upper end of the curved portion of the link 16. The lower roller of the rollers 17 is located immediately in front of the curved portion of the gate 16. The Armlehnträger 15 and with him the seat 4 is in the direction the seat width extending axis pivoted by the lower roller 17 of the rollers forward or tilted.

This stand-up auxiliary position allows a user to easily and comfortably get up from the chair 1.

In the in FIGS. 7 and 8 Parts of the base support 9, the actuator 11 and the adjusting mechanism 12 of each unit 8 on the underside of the respective armrest 2 protrude partially out of the recess 3. Here are only the base support 9 on the base 10.

Preferably, the two recesses 3 on the inside of the respective armrest 2 are at least partially open. It is particularly preferred if in this case the actuating mechanism 12 and preferably also the actuator 11 of a unit 8 is at least partially surrounded by a housing not shown or are. The housing can then form a side wall of the respective armrest 2 on the inside of the respective armrest 2.

Preferably, the seating 1 below the seat 4 in a front area a the armrest 2 in the direction of the seat width connecting, in Fig. 1 dashed lines indicated front frame 4 'and / or in a rear area a the armrest 2 in the direction of the seat width connecting, not shown back frame. The front and / or rear frame can each form a static cross connection between the two armrests 2. Advantageously, then in the space below the seat 4 between the two armrests 2 and the front and rear frame no components of the chair 1, in particular the Aufstehhilfsvorrichtung, especially the actuator 11 and / or the actuating mechanism 12, respectively.

LIST OF REFERENCE NUMBERS

1

seating

2

armrest

3

Recess of the armrest

4

Seat

5

backrest

6

Armrest of the armrest

7

pad

8th

unit

9

base support

10

footprint

11

actuator

12

actuating mechanism

13

Electric motor of the actuator

14

Threaded spindle of the actuator

15

Armrest carrier of the adjusting mechanism

16

Backdrop of the basic carrier

17

role

18

Lever handle of the actuating mechanism

Claims (13)

1. Piece of seating furniture, in particular (arm)chair,
   having two lateral armrests (2), each with at least one recess (3),
   having a seat (4), which is bounded laterally by the two armrests (2),
   having a standing-up aid, with the aid of which the piece of seating furniture (1) can be adjusted from a sitting position into a standing-up-aiding position, and vice versa, wherein the standing-up aid has at least one actuating drive (11) and an actuating mechanism (12), and
   having at least two base supports (9), which, at least in the standing-up-aiding position of the piece of seating furniture (1), rest, at least in part, on a standing surface (10) and thus form a stand of the piece of seating furniture (1), wherein, by means of the actuating mechanism (12) driven by the actuating drive (11), the piece of seating furniture (1) is raised or lowered in relation to the base supports (9) and is thus adjusted from the sitting position into the standing-up-aiding position, and vice versa, characterized
   in that, at least in the sitting position of the piece of seating furniture (1), the actuating drive (11) is arranged in a recess (3) of an armrest (2) or a respective actuating drive (11) is arranged in a respective recess (3) of the armrests (2), and
   in that, at least in the sitting position of the piece of seating furniture (1), at least parts of the actuating mechanism (12) are arranged in in each case at least one recess (3) of the armrests (2) .
2. Piece of seating furniture according to Claim 1, characterized
   in that each armrest (2) is assigned a complete unit (8) made up of actuating drive (11), actuating mechanism (12) and base support (9), wherein each unit (8), at least in the sitting position of the piece of seating furniture (1), is arranged in a recess (3) of the associated armrest (2), and wherein preferably each unit (8) can be removed, in particular drawn, right out of the recess (3),
   wherein preferably the two units (8) are of essentially identical configuration.
3. Piece of seating furniture according to one of the preceding claims, characterized in that the actuating mechanism (12) is arranged in the recesses (3) such that, when the actuating mechanism (12) is driven by means of the actuating drive (11), force is transmitted from the actuating mechanism (12) to the armrests (2).
4. Piece of seating furniture according to one of the preceding claims, characterized in that in each case at least one recess (3) of the armrests (2) is open, at least in part, at least in the direction of the standing surface (10),
   wherein preferably at least one recess (3) is open, at least in part, at least on the inside of the respective armrest (2).
5. Piece of seating furniture according to Claims 2 and 4, characterized
   in that the actuating mechanism (12) and preferably also the actuating drive (11) of a unit (8) is or are enclosed, at least in part, by a housing, wherein preferably the housing forms a side wall of the respective armrest (2) on the inside of the respective armrest (2).
6. Piece of seating furniture according to one of the preceding claims, characterized in that there are no components of the standing-up aid, in particular of the actuating drive (11) and/or of the actuating mechanism (12), arranged in the space beneath the seat (4) and between the two armrests (2).
7. Piece of seating furniture according to one of the preceding claims, characterized in that the piece of seating furniture (1), beneath the seat (4), has, in a front region, a front frame (4'), which connects the armrests (2) in the direction of the seat width, and/or, in a rear region, a rear frame, which connects the armrests (2) in the direction of the seat width, said frames each forming a static transverse connection between the two armrests (2),
   wherein there are preferably no components of the piece of seating furniture (1), in particular of the standing-up aid, quite particularly of the actuating drive (11) and/or of the actuating mechanism (12), arranged in the space beneath the seat (4) between the two armrests (2).
8. Piece of seating furniture according to one of the preceding claims, characterized in that the seat height of the piece of seating furniture (1) can be adjusted with the aid of the standing-up aid.
9. Piece of seating furniture according to one of the preceding claims, characterized in that each actuating drive (11) is configured in the form of an electric actuating drive (11), in particular with an electric motor (13) and a threaded spindle (14).
10. Piece of seating furniture according to one of the preceding claims, characterized in that the standing-up aid has an electronic control unit for controlling the actuating drive (11) or the actuating drives (11), wherein the control unit, in the case of more than one actuating drive (11), preferably synchronizes the actuating drives (11),
    wherein preferably the electronic control unit, at least in the sitting position of the piece of seating furniture (1), is arranged in one of the recesses (3).
11. Piece of seating furniture according to Claim 2 and optionally according to one of Claims 3 to 10, characterized
    in that the actuating mechanism (12) of each unit (8) has an armrest support (15),
    in that the base support (9) of each unit (8) has a guide track (16),
    in that the armrest support (15) is connected to the associated armrest (2) and is guided in a displaceable manner in the guide track (16) of the base support (9), and
    in that the actuating drive (11) of the unit (8) is articulated on the armrest support (15) and the base support (9) such that extension of the actuating drives (11) of the two units (8) causes the armrest supports (15) of the two units (8) to be raised, as a result of which the piece of seating furniture (1) can be adjusted from the sitting position into the standing-up-aiding position, and/or
    in that the actuating drive (11) of the unit (8) is articulated on the armrest support (15) and the base support (9) such that retraction of the actuating drives (11) of the two units (8) causes the armrest supports (15) of the two units (8) to be lowered, as a result of which the piece of seating furniture (1) can be adjusted from the standing-up-aiding position into the sitting position.
12. Piece of seating furniture according to Claim 2 and optionally one of Claims 3 to 10, characterized
    in that the actuating mechanism (12) of each unit, (8) has an armrest support (15) and a liftingaction link (18),
    in that the base support (9) of each unit (8) has a guide track (16),
    in that the armrest support (15) is connected to the associated armrest (2) and is guided in a displaceable manner in the guide track (16) of the base support (9), and
    in that the lifting-action link (18) is articulated on the armrest support (15) and the base support (9), and the actuating drive (11) of the unit (8) is articulated on the lifting-action link (18) and the base support (9), such that extension of the actuating drives (11) of the two units (8) causes the armrest supports (15) of the two units (8) to be raised, as a result of which the piece of seating furniture (1) can be adjusted from the sitting position into the standing-up-aiding position, and/or
    in that the lifting-action link (18) is articulated on the armrest support (15) and the base support (9), and the actuating drive (11) of the unit (8) is articulated on the lifting-action link (18) and the base support (9), such that retraction of the actuating drives (11) of the two units (8) causes the armrest supports (15) of the two units (8) to be lowered, as a result of which the piece of seating furniture (1) can be adjusted from the standing-up-aiding position into the sitting position.
13. Piece of seating furniture according to Claim 11 or 12, characterized
    in that the guide track (16), in an end region, is curved away from the seat (4) in the direction of the seat depth of the piece of seating furniture (1),
    in that the armrest support (15) is guided in a displaceable manner in the guide track (16) via at least two sliding elements or rollers (17) arranged one above the other, and
    in that the armrest support (15) can be pivoted by the lower roller of the rollers (17), or by the lower sliding element of the sliding elements, about an axis running in the direction of the seat width of the piece of seating furniture (1), and therefore full extension of the actuating drive (11) of the unit (8) causes the upper roller (17) or the upper sliding element to be displaced into the curved region of the guide track (16), as a result of which the piece of seating furniture (1) can be tilted forward.

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