Piece of seating furniture

Abstract

A piece of seating furniture (10) with a seat surface (14) and a backrest (16) is provided with a headrest (20), which can be guided to move between a storage position and a use position. For this purpose, a guide mechanism (100) is provided, which has at least two pivot arms (130, 140), which are pivotably attached on the one hand to a fastening flange (110) and on the other hand to a headrest support (150). At least one of the pivot arms (130, 140) is designed as a length-adjustable pivot arm (130, 140), wherein at least one control link guide (112, 114) is provided, by means of which the length of the at least one length-adjustable pivot arm (130, 140) is changed during pivoting relative to the fastening flange (110).

Description

[0001] The invention relates to a piece of seating furniture, in particular in the form of an armchair or sofa. A generic piece of seating furniture has a seat and a backrest. Typically, the seat and backrest of an armchair or sofa are upholstered.

[0002] Specifically, the invention relates to a piece of seating furniture with a headrest which is arranged above the backrest in a use position.

[0003] Headrests on sofas or armchairs are problematic from an aesthetic point of view. The generally flat appearance of an armchair or sofa is disrupted by a headrest, so prior art has already proposed making the headrest movable and capable of being stored when not in use, in order to achieve a more attractive appearance of the seating furniture, at least when the headrest is not in use.

[0004] However, existing seating furniture with headrests that can be moved from the in-use position to a stowed position usually suffers from additional aesthetic disadvantages. For example, sufficiently large headrests that are lowered in the stowed position often require the seating furniture to have a considerable depth behind the backrest. This results in the seating furniture as a whole becoming undesirably large and having unflattering proportions. TASK AND SOLUTION

[0005] The object of the invention is to provide a piece of seating furniture which has a headrest which can be moved between a storage position and a use position, wherein the headrest should be as inconspicuous as possible in the storage position and wherein the ability to move the headrest into the storage position should have as little negative an impact as possible on the aesthetics of the entire piece of furniture.

[0006] To solve this problem, a piece of seating furniture is proposed, particularly designed as an upholstered sofa or armchair. In the typical manner, the seating furniture has a seat and a backrest. It is advantageous if the seating furniture also has a movable legrest that can be extended and retracted by an electric motor, with the legrest preferably being movable completely separately from the headrest described here.

[0007] As already stated at the beginning, a piece of seating furniture according to the invention has a headrest that can be guided and displaced between a storage position and a use position. The headrest is preferably also padded. In particular, a preferably padded headrest body of the headrest has a flat shape with a substantially flat front headrest surface that is oriented substantially vertically in the use position of the headrest. The headrest surface of the headrest preferably has a minimum area of 40 cm x 25 cm. The thickness of a headrest body of the headrest is preferably less than 20 cm, in particular less than 15 cm. A headrest rod is preferably provided, which is attached to an inner frame of the headrest and firmly connects the headrest to a headrest support that is movable for the purpose of displacing the headrest.

[0008] In the use position, the headrest is positioned above the backrest. In the stowed position, however, the headrest is lowered and located in a space behind the backrest.

[0009] A guide mechanism is provided for transferring the headrest from the stowed position to the use position. This allows the headrest to be moved along a path defined by the guide mechanism. This path primarily defines the vertical movement of the headrest, but may also include a pivoting movement.

[0010] The guide mechanism has a design that allows for a shallow construction. Preferably, the total depth of the guide mechanism, including an associated mounting flange for attachment to a supporting structure and excluding the headrest itself and its headrest rods, is less than 50 cm in any phase of movement.

[0011] The guide mechanism comprises a mounting flange for attachment to a supporting structure of the seating furniture. The mounting flange can, in particular, have a cheek configured as a sheet metal part or two such opposing cheeks that are attached, e.g., screwed, to the supporting structure of the seating furniture.

[0012] The guide mechanism also includes a headrest support to which the headrest is attached and which is guided and movable relative to the mounting flange.

[0013] For the guided displacement of the headrest support relative to the mounting flange, at least two pivot arms are provided, each of which is pivotably mounted on the mounting flange by means of a respective proximal end about a first pivot axis or a second pivot axis, and each of which is pivotably mounted on the headrest support by means of a respective distal end about a third pivot axis or a fourth pivot axis. The mounting flange, which is fixed to a base of the seating furniture or to the backrest, and the headrest support are thus connected to each other by the two pivot arms.

[0014] When the headrest is to be moved from its stowed position into the use position, these two pivot arms pivot, one of the pivot arms preferably being driven by an electric motor, as described below. The pivoting movement of the pivot arms also displaces the headrest support attached to the distal end of the pivot arms and thus also the headrest itself. When transferring the headrest from the stowed position into the use position, the pivot arms preferably pivot through a total angle of approximately 70° to 90°. In particular, the pivot arms are preferably in an obliquely downward orientation in the stowed position, in which the second pivot axis is arranged below the first pivot axis and the fourth pivot axis is arranged below the third pivot axis.In the use position, the pivot arms are preferably in an obliquely upward orientation, in which the second pivot axis is arranged above the first pivot axis and the fourth pivot axis is arranged above the third pivot axis.

[0015] In order to keep the required installation space small and yet achieve a large displacement distance along which the headrest is transferred from the stowed position to the use position, at least one of the pivot arms is designed as a length-adjustable pivot arm. The proximal end and the distal end of this length-adjustable pivot arm can be displaced relative to one another along a movement path mechanically predetermined by the pivot arm itself. In an extended configuration, the first and third, or the second and fourth, pivot axes are at a maximum distance from one another. In a shortened configuration, the first and third, or the second and fourth, pivot axes are at a minimum distance from one another.

[0016] A simple way of realizing the length variability is for the at least one length-adjustable pivot arm to have a first arm segment and a second arm segment, with the first arm segment forming the proximal end of the pivot arm and the second arm segment forming the distal end of the pivot arm. By connecting the two arm segments to one another, the two arm segments can move relative to one another in a defined manner. One possibility for such guidance is for an elongated hole to be provided in one of the arm segments and for two sliders or rollers to engage in the elongated hole on the other arm segment. An alternative possibility is for the two arm segments to be movable relative to one another in a defined manner by means of two connecting straps. The two connecting straps, which can be of equal or different lengths, connect the arm segments to one another and allow a defined relative movement.In the case of connecting plates of equal length, which are hinged to the arm segments at the same distance, the arm segments are displaced parallel to each other when the swivel arm is shortened and extended.

[0017] To control the length change, at least one control link guide is provided, by means of which the length of the at least one length-adjustable swivel arm is changed during pivoting relative to the mounting flange. For this purpose, a link body is guided in the control link during the pivoting movement of the length-adjustable swivel arm, thereby applying force to the proximal end of the swivel arm and the distal end of the swivel arm, respectively, moving away from and toward each other.

[0018] Preferably, the shape of the at least one control link is selected such that the length-adjustable pivot arm is in an extended configuration when the headrest is in the stowed position and, starting from this, is first shortened and then stretched again when transferred into the use position by means of the control link. This makes it possible to keep the depth of the guide mechanism in the longitudinal direction of the furniture small. In particular, such shortening and subsequent stretching of the at least one length-adjustable pivot arm is advantageous in the design described above, in which the pivot arm points diagonally downwards when the headrest is in the stowed position and diagonally upwards when it is in the use position. During transfer from the stowed position to the use position, there is an intermediate phase in which the pivot arm is aligned approximately horizontally.In this intermediate phase, a fixed-length swivel arm would require maximum installation space. The adjustable length and the temporary shortening of the swivel arm when the headrest is extended avoid this, and only a comparatively small amount of space is required for the guide mechanism behind the backrest in the longitudinal direction of the furniture.

[0019] Particularly preferably, not just one of the pivot arms is variable in length, but both pivot arms. In such a design, it is advantageous if two control link guides are also provided corresponding to the two variable-length pivot arms, wherein each of the control link guides is assigned to one of the two variable-length pivot arms in such a way that the respective variable-length pivot arm is varied in length during pivoting relative to the mounting flange by the assigned control link guide, in particular, is initially shortened and then extended again.

[0020] The control link of the at least one control link guide is preferably provided as an opening in a component, in particular in a mounting flange component. In the case of a design with two control links as part of two control link guides, it is advantageous if both control links are formed by openings in the same component, in particular the mounting flange component.

[0021] The control links of the two control link guides preferably have an upwardly diverging course, so that link bodies arranged in the control links are further apart from each other in the horizontal direction in an upper end position than in a lower end position.

[0022] The control of the extension of the at least one length-adjustable pivot arm makes it possible to control the movement sequence in such a way that the headrest is guided just past the backrest during transfer from the stored position to the use position and is then shifted forwards, whereby the headrest reaches the use position in which it adjoins the contact surface of the backrest in an ergonomically advantageous manner. In particular, it is preferably provided that the control link which controls the change in length of an upper of the two pivot arms is shaped in such a way that the increase in length of this upper pivot arm in a final phase of the transfer movement is less than the change in length of the lower of the two pivot arms. This ensures that in the final phase of the movement the headrest support pivots forwards, i.e. clockwise relative to a view of the piece of seating furniture from the left.This headrest support movement is desired in order to pivot the headrest forward into the use position towards the end of the movement.

[0023] Preferably, the first pivot axis, the second pivot axis, the fourth pivot axis, and the third pivot axis together form a quadrilateral whose opposite edges, when the headrest is in the stowed position, are aligned parallel to one another or diverge at an angle of less than 30°, preferably at an angle of less than 20°. In the use position of the headrest, however, at least two opposite edges of the quadrilateral preferably diverge more sharply and, in particular, preferably enclose an angle of more than 30°.

[0024] The guide mechanism is preferably designed in such a way, in particular by the shape of at least one control link of the at least one control link guide, that when the headrest is transferred from the stowed position to the use position, the following two movement phases are run through one after the other: In a first movement phase, starting from the stowed position of the headrest, the headrest is raised, wherein in this first movement phase the headrest overcomes at least 80% of a vertical distance between the position of the headrest in the stowed position and the position of the headrest in the use position and wherein the headrest is not pivoted forward to any significant extent in this first phase. Instead, the headrest can even be pivoted backward in this first phase or not pivot at all. Pivoting forward is also possible, but by a small angle of a maximum of 10°.This behavior allows the headrest to be guided past the backrest without collision during the first phase of movement.

[0025] In a second movement phase, once the headrest has passed the backrest without collision, it is displaced vertically by a maximum of 20% of the vertical distance between the position of the headrest in the stowed position and the position of the headrest in the use position, with the headrest being pivoted forward by at least 15° during this second phase. After this second movement phase, the headrest assumes a position and orientation that is suitable for use, in particular with the headrest surface aligned vertically. As already explained above, this relatively strong pivoting movement of the headrest in the second movement phase can be achieved in particular by controlling the extension of the two pivot arms in such a way that in the second movement phase, the lower of the two pivot arms is extended to a greater extent than the upper of the two pivot arms by means of the associated control link.

[0026] The described elements of the guide mechanism, in particular the first and second pivot arms, have each been described in the singular. In practice, however, it is advantageous if at least some of the elements are provided twice, namely on two end subassemblies of a furniture fitting relative to the transverse direction of the furniture. The guide mechanism is formed by these two external subassemblies. Each of the subassemblies preferably has a fastening flange as well as two pivot arms and at least one control link guide, whereby the respective left- and right-hand pivot arms of both subassemblies always move together. In particular, at least one pivot arm on a first of the two subassemblies is preferably connected to the corresponding pivot arm on the second subassembly by a torsionally rigid connection, in particular by a torsion tube.In the case of two separate mounting flanges on the left and right sides of the fitting, these are preferably connected to each other via at least one connecting strut. The connecting strut can preferably also be designed as a connecting tube.

[0027] For the purpose of automatic relocation, an electric motor drive is preferably provided, by means of which the headrest can be transferred from the stowed position to the use position. The electric motor drive preferably acts on one of the pivot arms and, in the case of a two-part pivot arm, in particular on the first arm segment of this pivot arm.

[0028] The electric motor drive can be provided, in particular, in the form of a linear actuator having a push rod that can be extended electrically relative to a base unit of the linear actuator. The linear actuator is preferably pivotally connected to the mounting flange on the one hand and to one of the pivot arms on the other. The use of a linear actuator is structurally very simple and, in particular, allows for particularly simple control of the electric motor drive.

[0029] To achieve an aesthetically pleasing shape of the piece of seating furniture, particularly when the headrest is arranged in the stowed position, a receiving space is preferably provided for receiving the headrest, wherein the receiving space accommodates at least the majority of the headrest in the stowed position. The receiving space is preferably open on an upward-facing side or is provided with a movable screen there. Furthermore, the receiving space is preferably enclosed by walls to the sides and rear, so that the headrest dips into the receiving space when transferred to its stowed position. The receiving space can be closed at the bottom and thus towards the floor or remain open.

[0030] It can be provided that the headrest is not stored completely opaquely in the stowed position, but a part, in particular an upper side of the headrest, protrudes from the receiving space and / or forms an upper end surface which is visible from the outside even in the stowed position of the headrest.

[0031] However, a design in which the receiving space is designed to accommodate the entire headrest and has a movable screen is advantageous. The screen closes off the receiving space at the top in a closed position. The screen can be moved from its closed position to an open position when the headrest is moved into the use position. Preferably, the headrest and screen are coordinated in such a way that the screen is in the closed position both when the headrest is in the stowed position and when it is in the use position.

[0032] Preferably, the screen is pivotably mounted on the supporting structure of the seating furniture. In particular, a corresponding hinge device can be provided on a rear wall of the seating furniture. Furthermore, a spring device is preferably provided, by means of which the screen is always subjected to force in the direction of its closed position. In such a case, the screen is moved against the force of the spring device.

[0033] In principle, a design is conceivable in which the screen is moved independently of the movement of the headrest, for example manually or by means of a separate electric motor.

[0034] However, a preferred design is one in which the movable screen and the headrest, in particular a headrest linkage of the headrest, are coordinated with one another in such a way that the movable screen is pressed into its open position both when the headrest is moved into the stowed position and when the headrest is moved into the use position. In such a design, the headrest is passively operated, in that the screen is opened by the screen being indirectly moved by the headrest. Particularly preferably, such opening of the screen occurs both when the headrest is moved into the use position and when the screen is moved into the stowed position.

[0035] A particularly advantageous embodiment has been found for the headrest to have a headrest rod that extends into a headrest body at a rear end surface of the headrest. This is advantageous over attaching the headrest rod to the underside of the headrest body, as it prevents the movable screen from becoming jammed when the headrest is moved into the stowed position below the headrest body, thus preventing the continuation of the transfer.

[0036] The headrest body can be permanently connected to the aforementioned rod. It is also possible to provide limited manual adjustment, allowing a user, for example, to pivot the headrest body slightly further forward to allow a comfortable reading position. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Further advantages and aspects of the invention emerge from the claims and from the following description of preferred embodiments of the invention, which are explained below with reference to the figures. Fig. 1 und 2 show a piece of seating furniture according to the invention in two states, namely with the arrangement of a headrest in the stowed position ( Fig. 1 ) and in the use position ( Fig. 2 ). Fig. 3 und 4 illustrate the essential components of the seating furniture and in particular its guide mechanism. Fig. 5A bis 5E show the process of transferring the headrest from its storage position in a receiving space to the use position above the backrest. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Fig. 1 und 2 show a piece of seating furniture 10 according to the invention in the form of an armchair with a seat 14 and a backrest 16. Not shown in the figures is a leg rest that can be extended in front of the seat 14.

[0039] Furthermore, the piece of seating furniture 10 has a headrest 20. The piece of seating furniture 10 is in the Fig. 1 und 2 in two states, namely in Fig. 1 with the headrest 20 in its stowed position and in Fig. 2 with the headrest 20 in a use position.

[0040] In the stowed position of the Fig. 1 the headrest 20 cannot be seen from the outside, since it is located in a receiving space 18 below the Fig. 1 shown screen 18A is hidden. In the use position of the Fig. 2 the headrest 20 is extended and its head support surface 24 is approximately aligned with the backrest 16, so that a comfortable sitting position with the head leaning back can be achieved.

[0041] As already mentioned Fig. 2 As can be seen, the screen 18A is closed in the use position of the headrest 20 as well as in the stowed position. Two rods of a headrest linkage 22, which support the padded headrest body, are guided outwards through recesses in the screen 18A in this state. Only when the headrest 20 is transferred from the stowed position to the use position and from the use position to the stowed position is the screen 18A temporarily pivoted open, as shown below.

[0042] To transfer the headrest 20 between the stowed position of the Fig. 1 and the use of the Fig. 2 A guide mechanism 100 is provided, the elements of which are determined by the Fig. 3 und 4 be explained first.

[0043] The guide mechanism 100 has two lateral mounting flanges 110, each in the form of a sheet metal part, which is attached, in particular screwed, to a supporting structure of the seating furniture. The two mounting flanges 110 are connected to each other via cross tubes.

[0044] Pivoting arms 130, 140 are pivotably connected to the mounting flanges 110 about pivot axes 132A, 142A. The pivoting arms are arranged vertically offset from one another, thus forming a lower pivoting arm 130 and an upper pivoting arm 140.

[0045] The pivot arms 130, 140 each have two arm segments 134, 136 and 144, 146, respectively, which allow a change in the length of the pivot arms 130, 140. The proximal arm segments 134, 144, which are pivotally mounted directly on the mounting flange 110, are attached to the distal arm segments 136, 146 via pivot arm guides 138, 148. The distal arm segments 136, 146 are pivotally mounted about the pivot axes 132B, 142B on a headrest support 150, to which the previously described headrest rod assembly 22 is attached.

[0046] The two distal arm segments 136, 146 are each equipped with guide elements 113, 115, which are designed as sliding elements or as rotatable rolling elements. These guide elements 113, 115 extend into two control elements of two control element guides 112, 114, wherein the control elements are provided as openings in the mounting flanges 110. A pivoting movement of the pivot arms 130, 140 about the pivot axes 132A, 142A relative to the mounting flange 110 therefore results in the guide elements 113, 115 being displaced within these control elements, thus effecting positive control of the distal arm segments 136, 146.

[0047] The two control links, through their respective paths, allow the specific pivot position of each pivot arm 130, 140 to be determined, and to what extent, in which pivot position of the respective pivot arm 130, 140 the distal arm segment should be extended. Since the distal arm segments 136, 146 are themselves pivotally connected to the headrest support 150, the control links of the control link guide 112, 114 indirectly determine the orientation of the headrest in which phase of extension.

[0048] The extension and retraction of the headrest 20 is effected by means of an electric motor drive 160. In the present case, this is designed as a linear actuator having an electric push rod 164 that can be extended relative to a base unit 162. The base unit 162 is pivotally mounted on a supporting structure of the piece of seating furniture and pivotally mounted on the proximal arm segment 134 of the lower pivot arm 130. If the push rod 164 is extended, the lower pivot arm 130 pivots relative to Fig. 4 clockwise upwards.

[0049] The following describes the procedure for extending the headrest starting from the stowed position using the Fig. 5A bis 5E explains: The condition of the Fig. 5A is the initial state with the headrest 20 retracted. In this state, the headrest 20 is located completely within the receiving space 18. The pivot arms 130, 140 are each pivoted downwards and fall backwards from the pivot axes 132A, 142A. Due to the respective shape of the control links of the control link guide 112, 114 and the link bodies 113, 115 arranged therein, the distal arm segments 136, 146 of both pivot arms 130, 140 are in their maximum extended state in order to place the headrest support 150 as far down as possible in the receiving space 18 in this state. Due to this arrangement, it is achieved that even a comparatively tall headrest body of the headrest 20 can be stored completely within the receiving space of the relatively flat piece of seating furniture 10.

[0050] Based on the state of the Fig. 5A To transfer the headrest 20 into its use position, the push rod 164 of the linear actuator 160 is extended. As can be seen from the Fig. 5B As can be seen, this initially leads to the lower pivot arm 130 being pivoted clockwise. Due to the shape of the control link of the control link guide 112, the pivot arm 130 is also shortened at the same time.

[0051] The pivoting of the pivot arm 130 and its shortening leads to a lifting of the headrest support 150, which in turn is accompanied by a lifting of the pivot axis 142B and a pivoting of the pivot arm 140. Since the pivot arm 140, like the pivot arm 130, is positively controlled with respect to its length by the control links of the control link guide 112, 114, the tilt position of the headrest support 150 and thus of the headrest 20 is also predetermined by the shape of the control links.

[0052] In a first phase of the movement during the transition from the state of Fig. 5A in the state of Fig. 5b The shortening of the pivot arms 130, 140 is largely identical, so that the headrest support 150 is not tilted to any significant extent. It therefore maintains its alignment together with the headrest 20, and the headrest 20 is primarily displaced vertically in this first phase while maintaining a largely constant alignment.

[0053] The displacement of the headrest 20 causes it to strike the screen 18A from below. The screen 18A is therefore pivoted open by the headrest 20 against the force of a closing spring (not shown), allowing the headrest 20 to be moved out of the receiving space 18.

[0054] The continued extension of the push rod 164 of the linear actuator 160 leads to a continued pivoting of the pivot arms 130, 140, whereby the position of the pivot axes 132A, 142A and the shape of the control links result in the headrest support 150 and the headrest 20 pivoting slightly backwards during the continued pivoting movement of the pivot arms. In the state of Fig. 5C the headrest 20 is therefore slightly less than 5° compared to the state of the Fig. 5A and 5B This allows the headrest to be guided more easily past the backrest 16. The swivel arms 130, 140 have Fig. 5C an approximately horizontal alignment is achieved. In order to keep the required installation depth of the guide mechanism low, especially during this phase, the pivot arms 130, 140 are in their maximally shortened state during this intermediate phase.

[0055] The screen 18A continues to be held open by the headrest 20, whereby it no longer rests against the top of the headrest body, but against its rear wall.

[0056] The continued extension of the push rod 164 leads to a further pivoting of the pivot arms 130, 140 into the position of Fig. 5D Due to the shape of the control links, the headrest support 150 and with it the headrest 20 are pivoted further backwards up to a maximum of approximately 7° compared to the initial orientation of the headrest support in the state of Fig. 5A .

[0057] In the state of Fig. 5D the upper swivel arm 140 is already extended to about 50%, while the lower swivel arm 130 is only extended to about 30%.

[0058] In the subsequent final phase of the extension of the headrest 20, which is characterized by the transition from the state of Fig. 5D in the state of Fig. 5E As can be seen, the two swivel arms 130, 140 are swiveled to their swivel end position. Since the upper swivel arm 140 was already in the state of Fig. 5D was extended quite extensively and in the associated control link of the control link guide 114 a final bend of the course is provided, the upper pivot arm 140 is extended only by a comparatively small distance in this last phase. The lower pivot arm 130, on the other hand, is extended significantly more, which leads to the headrest support 150 pivoting relatively strongly forward in this last phase. Together with the headrest support 150, the headrest 20 also pivots forward, so that upon reaching the state of Fig. 5E is in its use position.

[0059] The return of the headrest 20 from the use position to the stowed position takes place in the reverse order of the intermediate positions described. Controlled by the electric motor drive 160, the pivot arm 130 is moved relative to the perspective of the Fig. 5E bis 5A pivoted counterclockwise, whereby in the manner described for the extension, this also results in a pivoting movement of the pivot arm 140 as well as a shortening and subsequent extension of the pivot arms 130, 140 defined by the control links.

[0060] The screen 18A is also opened when retracted by the headrest against the force of the closing spring. It is helpful here that the headrest rod 22 penetrates the headrest body at a rear side of the headrest 20. This allows the screen 18A to be initially pushed open using the headrest rod until the front edge of the screen 18A comes into contact with the rear side of the headrest 20 and is held in the open position by the latter until the headrest is fully repositioned in the receiving space 18 and the screen has been pressed into the closed position by the force of the closing spring.

Claims

1. A piece of seating furniture (10) with the following features: a. the piece of seating furniture (10) has a seat surface (14) and a backrest (16), and b. the piece of seating furniture (10) has a headrest (20) which can be moved in a guided manner between a storage position and a use position, wherein the headrest (20) is arranged above the backrest (16) in the use position and wherein the headrest (20) is lowered in the storage position, and c. a guide mechanism (100) is provided, by means of which the headrest (20) can be transferred along a defined movement path from the storage position to the use position, and d.the guide mechanism (100) comprises at least the following components: - at least one fastening flange (110) for fastening to a supporting structure of the piece of seating furniture (10), and - at least one headrest support (150) to which the headrest (20) is fastened, and - at least two pivot arms (130, 140) which are attached to the fastening flange (110) by means of a respective proximal end so as to be pivotable about a first pivot axis (132A) or a second pivot axis (142A) and which are pivotable about a third pivot axis (132B) ora fourth pivot axis (142B) is pivotally mounted on the headrest support (150), wherein at least one of the pivot arms (130, 140) is designed as a length-adjustable pivot arm (130, 140), the proximal end and the distal end of which are displaceable relative to one another along a movement path mechanically predetermined by the pivot arm (130, 140) itself, and wherein at least one control link guide (112, 114) is provided, by means of which the length of the at least one length-adjustable pivot arm (130, 140) is changed during pivoting relative to the fastening flange (110).

2. A piece of seating furniture (10) according to one of the preceding claims, having the following further feature: a. both pivot arms (130, 140) are designed as length-adjustable pivot arms (130, 140).

3. A piece of seating furniture (10) according to claim 2 with the following additional feature: a. two control link guides (112, 114) are provided, each of the control link guides (112, 114) being assigned to one of the two length-adjustable pivot arms (130, 140) in such a way that the respective length-adjustable pivot arm (130, 140) is changed in length by the assigned control link guide (112, 114) during pivoting relative to the fastening flange (110), preferably with the following additional feature: b. the control links of each of the two control link guides (112, 114) are provided as openings in a common component (110), in particular as openings in the fastening flange (110).

4. A piece of seating furniture (10) according to claim 3, having the following further feature: a. the control links of the two control link guides (112, 114) have an upwardly diverging profile, so that link bodies (113, 115) arranged in the control links are further apart from one another in the horizontal direction in an upper end position than in a lower end position.

5. A piece of seating furniture (10) according to one of the preceding claims, having the following additional features: a. the at least one length-adjustable pivot arm (130, 140) has a first arm segment (134, 144) and a second arm segment (136, 146), wherein the first arm segment (134, 144) forms the proximal end of the pivot arm (130, 140) and wherein the second arm segment (136, 146) forms the distal end of the pivot arm (130, 140), and b. by connecting the two arm segments (134, 136, 144, 146) to one another, the two arm segments (134, 136, 144, 146) are movable relative to one another in a defined manner.

6. A piece of seating furniture (10) according to one of the preceding claims, having one of the following further features: a. the two arm segments (134, 136, 144, 146) are movable relative to one another in a defined manner by means of a pivoting arm guide (138, 148), or b. the two arm segments are movable relative to one another in a defined manner by means of two connecting straps.

7. A piece of seating furniture (10) according to one of the preceding claims, with the following further feature: a. the first pivot axis (132A), the second pivot axis (142A), the fourth pivot axis (142B), and the third pivot axis (142B) together define a quadrilateral, the opposite edges of which are each aligned parallel to one another or diverge at an angle of less than 20° when the headrest (20) is arranged in the storage position, preferably with the following further feature: b. at least two opposite edges of the quadrilateral diverge at an angle of more than 30° when the headrest (20) is arranged in the use position.

8. A piece of seating furniture (10) according to one of the preceding claims, having the following further feature: a. the guide mechanism (100) is designed in such a way, in particular by the shape of at least one control link of the at least one control link guide (112, 114), that when the headrest (20) is transferred from the stowed position to the use position, the following two movement phases are successively passed through: - in a first movement phase, starting from the stowed position of the headrest (20), the headrest (20) is raised, wherein in this first movement phase the headrest (20) overcomes at least 80% of a vertical distance between the position of the headrest (20) in the stowed position and the position of the headrest (20) in the use position, and wherein in this first phase the headrest (20) is pivoted backward, is not pivoted, or is pivoted forward by no more than 10°,and - in a second movement phase, the headrest (20) is displaced vertically by a maximum of 20% of the vertical distance between the position of the headrest (20) in the stowed position and the position of the headrest (20) in the use position, the headrest (20) being pivoted by at least 15° during this second phase.

9. A piece of seating furniture (10) according to one of the preceding claims, having the following further feature: a. the guide mechanism (100) is formed by a furniture fitting (100) which has two external sub-assemblies (102, 104)), each comprising a fastening flange (110) and two pivot arms (130, 140) and at least one control link guide (112, 114), preferably having one or more of the following features: b. at least one pivot arm (130, 140) on a first of the sub-assemblies (102, 104) is connected to the corresponding pivot arm on the second sub-assembly by a torsionally rigid connection, in particular by a torsion tube (106), and / or c. the fastening flanges (110) of both sub-assemblies are connected to one another via at least one connecting strut, in particular by at least one connecting tube (108).

10. A piece of seating furniture (10) according to one of the preceding claims, with the following further feature: a. an electric motor drive is provided, by means of which the headrest (20) can be transferred from the stowed position into the use position, preferably with the following additional feature: b. the electric motor drive is provided in the form of a linear actuator (160) which has a push rod (164) which can be extended by an electric motor relative to a base unit (162) of the linear actuator (160), the linear actuator (160) preferably being pivotably connected to the fastening flange (110) on the one hand and to one of the pivot arms (130) on the other hand.

11. A piece of seating furniture (10) according to one of the preceding claims, having the following further feature: a. the piece of seating furniture (10) has a receiving space (18) for receiving the headrest (20) in the stowed position, wherein the receiving space accommodates at least the majority of the headrest (20).

12. A piece of seating furniture (10) according to claim 11 with the following additional features: a. the receiving space (18) is designed to receive the entire headrest (20), and b. the piece of seating furniture (10) has a movable screen (18A) which closes off the receiving space (18) in a closed position and releases it in an open position, preferably with the following additional feature: c. the movable screen (18A) is pivotally mounted on the supporting structure of the piece of seating furniture (10).

13. A piece of seating furniture (10) according to claim 11 or 12, with the following additional feature: a. the movable screen (18A) and the headrest (20), in particular a headrest rod (22) of the headrest (20), are coordinated with one another in such a way that the movable screen (18A) is pressed into its open position both when the headrest (20) is transferred into the stowed position and when the headrest (20) is transferred into the use position, preferably with the following additional feature: b. the headrest rod (22) ends on the side of the headrest (20) at a rear end surface of the headrest (20).

14. A piece of seating furniture (10) according to one of the preceding claims, having at least one of the following additional features: a. a furniture fitting (100) forming the guide mechanism (100) has a depth in the longitudinal direction of the furniture of less than 50 cm in the stowed position, and / or b. the headrest (20) has a substantially flat shape with a head support surface (24) of at least 40 cm x 25 cm and a thickness of less than 20 cm, and / or c. a head support surface (24) of the headrest (20) is oriented substantially vertically in the use position.

15. A piece of seating furniture (10) according to any one of the preceding claims, having at least one of the following additional features: a. the piece of seating furniture (10) is designed as an armchair or sofa and is upholstered at least in the region of the backrest (16) and the seat surface (14), and / or b. the piece of seating furniture (10) has a movable leg rest which can be moved between a storage position beneath the seat surface and a use position in front of the seat surface, wherein preferably two separate electric motors are provided for controlling the headrest (20) and the leg rest.

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