Piece of seating furniture

Abstract

Seating furniture (10), in particular in the form of an armchair or a sofa, is known, comprising a seat (14) and a backrest (16), as well as at least one headrest (30) which is movable relative to the backrest (16) between a storage position and a usable position, wherein guide tabs (44, 46) are provided to guide the headrest (30) between the storage position and the usable position. It is proposed to design the guide tabs in such a way as to allow a largely parallel movement of the headrest.

Description

FIELD OF APPLICATION AND STATE OF THE ART

[0001] The invention relates to a piece of seating furniture with at least one headrest which can be moved between a storage position and a use position.

[0002] In particular, the invention relates to the field of upholstered furniture, i.e. armchairs and sofas which are partially or largely completely covered with a textile cover and at least partially provided with upholstery.

[0003] Such furniture is particularly used in living rooms, and it's desirable for the pieces to have an attractive appearance when not in use. A headrest, which can significantly improve comfort when the piece is in use, can be an aesthetic disadvantage when not in use.

[0004] It is already known to design the headrest so that it can be moved, thus creating a particularly aesthetically pleasing seating arrangement when not in use. Such a design is disclosed, for example, in the subsequently published patent application EP23168071.1.

[0005] Despite the known approaches, existing solutions are not yet considered optimal from an aesthetic point of view. TASK AND SOLUTION

[0006] The object of the invention is to provide a piece of seating furniture with a headrest, the headrest of which is designed and / or mechanically connected in such a way that it allows comfortable use and aesthetically pleasing storage when not in use.

[0007] According to the invention, a piece of seating furniture is proposed which, in accordance with the known prior art, has a seat and a backrest, and which further has at least one headrest that can be moved relative to the backrest between a storage position and a use position. In the case of a sofa, preferably several, and in particular two, such headrests are provided, which can be moved independently of one another into the use position and the storage position.

[0008] In the use position, the headrest is in a position in which a headrest contact surface is substantially aligned with a backrest contact surface of the backrest. Such an aligned arrangement means that the contact surfaces are aligned relative to each other in such a way that comfortable sitting with the back and head resting is possible. An aligned arrangement within the meaning of the invention does not mean an arrangement that is exactly aligned in the geometric sense.

[0009] In the stowed position, the headrest is lowered compared to the use position. The headrest can remain visible from the outside in the use position. However, designs are also possible in which the headrest is housed in a compartment visible from the outside in the stowed position.

[0010] To guide the headrest between the stowed position and the use position, at least one first guide tab and at least one second guide tab are provided. The two guide tabs form rigid and preferably metallic elements that are attached to the backrest and the headrest so they can pivot about different axes. The first guide tab is attached to the backrest so it can pivot about a first pivot axis and is attached to the headrest so it can pivot about a third pivot axis. The second guide tab is attached to the backrest so it can pivot about a second pivot axis and is attached to the headrest so it can pivot about a fourth pivot axis.

[0011] In practice, two first guide tabs and / or two second guide tabs are usually provided for each headrest, with one first guide tab and one second guide tab being assigned to the left end of the headrest, and one first guide tab and one second guide tab being assigned to the right end of the headrest. Preferably, the first or the second guide tabs are connected to one another by means of a torsion member, so that the first guide tabs on both sides or the second guide tabs on both sides always move together. Despite the fact that the first and the second guide tab are preferably each provided in duplicate, this does not necessarily and preferably does not apply to the other elements of the mechanism described below, in particular not to the motor described below, as well as the drive lever and the securing member.

[0012] According to the invention, it is provided that in such a piece of seating furniture the distance between the first and the third pivot axis of the first guide bracket, the distance between the second and the fourth pivot axis of the second guide bracket as well as the distance between the first and the second pivot axes on the backrest and the distance between the third and the fourth pivot axes on the headrest are selected such that the headrest is pivoted by less than 20° in the use position compared to the storage position.

[0013] In particular, the swivel angle of the headrest is preferably even smaller, in particular preferably less than 10° or ideally 0°.

[0014] The proposal is therefore for a headrest that remains largely or completely consistent in its orientation when transferred from the stowed position to the use position and that is relocated in this approximately or completely consistent orientation between the stowed position and the use position. The headrest's head support surface is typically largely vertically aligned in the use position and, due to this largely consistent orientation, is also at least substantially vertically aligned in the stowed position.

[0015] This alignment allows for a desirable shallow backrest depth, since, unlike conventional designs, it does not have to accommodate a headrest tilted horizontally. It can also be provided that the headrest retracts into a concealed storage space in the stowed position. The essentially vertical position in the stowed position is also advantageous in such a configuration, since the storage space can also be primarily vertically oriented and thus does not increase the overall depth of the seating furniture to an unacceptable extent.

[0016] It is particularly preferred if the headrest is visible from the outside in the stowed position, but fits flush with the rear structure of the backrest. In particular, it can be provided that a rear side opposite the headrest surface forms part of the rear end surface of the seating furniture in the stowed position.

[0017] This can be achieved in a particularly aesthetically advantageous way by providing a recess on the back of the backrest, in which the headrest is at least predominantly arranged in its stowed position. In such a case, a clever design of the recess can make the headrest almost invisible. It is particularly advantageous if the back of the backrest forms an end surface to the side of the recess and / or below the recess, which is completed in the area of ​​the recess by the back of the headrest. In particular, for this purpose the back of the headrest can protrude beyond this end surface by no more than 20 mm in relation to a longitudinal direction of the furniture in the stowed position or be set back by no more than 20 mm from this end surface, so that it forms an almost uniform back of the piece of furniture with the surrounding end surface.The size of the recess is preferably adapted to the size of the headrest. The recess is preferably adapted to the shape of the headrest in such a way that the headrest, in the stowed position, fills at least 90% of the volume of the recess.

[0018] In principle, it is possible to provide a purely manual operation for a piece of furniture according to the invention. In this case, a power source such as a spring is preferably provided to assist in the movement of the headrest. A locking mechanism in the use position is also useful in such a manual concept.

[0019] Preferably, however, a motor is provided, which could be designed as a spring motor, but is preferably an electric motor. The motor can be designed as a linear motor with a linearly extendable output member. This output member can act directly on one of the guide plates, thereby pivoting it.

[0020] However, a preferred design is one in which a drive lever is interposed which can be pivoted by means of the electric motor and which in turn acts directly or indirectly on one of the guide tabs and thereby displaces the headrest and the other guide tab.

[0021] The interposition of the drive lever is particularly useful when a large pivoting angle of both guide tabs between the stowed position and the use position is required. This pivoting angle is preferably > 120°, especially > 130°, since such a large angle allows for a large spacing of the headrest in the stowed position and the use position.

[0022] Such a swivel angle can be achieved by directly connecting the linearly extendable output link. However, this is not considered an optimal solution, as it requires a more powerful motor due to the unfavorable angles at the beginning and end of the movement. Furthermore, the movement profile is unfavorable. With a constant extension speed of the output link, the angular velocity of the headrest increases before reaching the use position. There is a risk that the headrest could strike the back of a person's head at a relatively high speed.

[0023] The interposition of the drive lever results in a different movement profile and, in particular, enables the targeted influencing of the movement profile. It can be provided that the drive lever covers a comparatively small angle of preferably less than 120° and, in particular, preferably between 75° and 110°, so that a roughly constant speed is achieved during this process, and that, by amplifying the movement, the guide plate nevertheless covers an angle of more than 120°, in particular an angle between 130° and 150°.

[0024] One possibility for connecting the drive lever and guide plate is an intermediate plate that is pivotally connected to the drive lever and the guide plate.

[0025] However, a design that has proven structurally advantageous is one in which a guide track is provided on the drive lever or the guide plate, in or along which a guide slider or roller, which is attached to the other component, can move. In the simplest case, such a guide can be formed by a sliding edge or a rolling edge. Preferably, it is a circumferentially closed structure such as a slotted hole. Even more complex shapes than a linear slotted hole are possible and allow the implementation of various motion sequences.

[0026] Preferably, the distance between the guide slider or guide roller and the pivot axis of the drive lever is at least temporarily and preferably at all times during the transfer of the headrest from the stowed position to the use position greater than the distance between the guide slider or guide roller and the backrest-side pivot axis of the guide plate driven by the drive lever. Despite the lower angular velocity of the drive lever, the greater distance to the guide slider and the guide roller or guide roller results in a sufficient angular velocity of the driven guide plate. The guide track is preferably provided on the drive lever. The guide slider or preferably the guide roller is preferably provided on the guide plate.

[0027] Preferably, the link is arranged in such a way that during the pivoting of the guide tab from the storage position into the use position, the link slider or the link roller are displaced in a first direction along the link track in a first phase and are displaced again in the opposite direction towards the starting position in a further second phase.

[0028] The guide tabs, as well as the headrest and the backrest, form a quadrilateral with the four pivot axes mentioned. To achieve the desired largely consistent alignment of the headrest, it is preferably provided that the opposing edges of the quadrilateral deviate from each other in terms of their length by no more than 10%, preferably by no more than 5%. A design in which opposing edges are almost identical (<1% deviation) is particularly preferred. This leads to a purely parallel displacement of the headrest. In particular, a headrest can thus be designed such that its alignment is purely vertical or almost vertical in the stowed position and the use position.

[0029] If a large pivot angle of the guide tabs is desired, this is particularly associated with the fact that, when the headrest is transferred from the stowed position to the use position, the four pivot axes temporarily enter an extended configuration in which connecting lines between the first and second pivot axes and between the third and fourth pivot axes each enclose an angle of less than 10°, preferably an angle of less than 5°, with connecting lines between the first pivot axis and the third pivot axis and between the second pivot axis and the fourth pivot axis. In particular, this angle can also be 0°, which means that all four horizontal pivot axes lie on one, in particular vertical, line.

[0030] Such an intermediate position is problematic for several reasons. Firstly, the headrest cannot absorb forces directed in the longitudinal direction of the furniture and is unstable. Secondly, there is a risk of rollover, in which the previously parallel guide tabs end up in a crisscross position.

[0031] Preferably, therefore, a securing element is provided which, in the aforementioned extended configuration, prevents the guide plates from tipping over into a crossing configuration. This can be achieved most simply by a securing element in the form of a connecting plate, which is pivotally attached to the first guide plate and the second guide plate. These can be fixed and defined pivot axes. If the rectangle is not a parallelogram, a pivot axis can also have limited mobility. Such a securing element prevents the aforementioned tipping over into a crossed position.

[0032] It is particularly advantageous if the pivot axes of the securing link are offset from the respective connecting line between the two other pivot axes of the respective guide bracket, in particular offset from this imaginary line by at least 20 mm, preferably by at least 40 mm. This creates a type of multiple parallelogram in which at least one of the parallelograms provides stability to the two guide brackets at any given time, and forces acting on the headrest can be absorbed at any time.

[0033] As explained at the outset, in a piece of seating furniture according to the invention, a first guide tab and a second guide tab are preferably provided at each end of the headrest. Preferably, the two guide tabs are sufficiently spaced from each other on each side to reduce the risk of crushing. In particular, it can be provided that the first guide tab and the second guide tab are spaced from each other by at least 10 mm, preferably at least 18 mm, in a transverse direction of the furniture. Alternatively, it can also be provided that the guide tabs are spaced significantly further from each other. For example, a design is also possible in which two first guide tabs are provided and only one second guide tab. In this case, the second guide tab can be provided centrally.Furthermore, a design is possible in which both guide tabs are positioned approximately centrally. It is even possible to provide only a first and a second guide tab, which are designed to be sufficiently stable in terms of shape and, in particular, material thickness.

[0034] If guide tabs are located near the end of a headrest, it may be advantageous to attach them to a side surface of the headrest so that they can be pivoted outward and thus visible. This ensures high stability of the headrest against unwanted pivoting movement around a vertical axis. It also prevents the headrest from being slit.

[0035] Other guide tabs can be pivotally mounted in an interior space of the headrest surrounded by outer surfaces of the headrest, wherein in particular preferably a slot is provided in the outer surface of the headrest for the passage of this other guide tab.

[0036] On the backrest side, the pivot axes are also preferably arranged within an interior space, so that slots may be required to guide the guide tabs to the outside. However, to minimize the need for these, and especially to avoid slots on the top of the backrest as much as possible, it is preferred for the guide tabs to extend beyond the backrest from behind. Ideally, this eliminates the need for a slot on the top of the backrest.

[0037] For this purpose, the at least one guide tab preferably has a curved shape, with a tab section of at least 12 cm in length. When the headrest is in the use position, this tab section extends from the rear over one upper end surface of the backrest and forms an angle of no more than 30° with a horizontal plane. Preferably, both guide tabs are designed in this manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Further advantages and aspects of the invention emerge from the claims and from the following description of a preferred embodiment of the invention, which is explained below with reference to the figures. Fig. 1A bis 1C show a piece of seating furniture according to the invention during the transfer of a headrest from a storage position to a use position. Fig. 2A und 2B show a headrest fitting in a perspective view and a side view in the stowed position. Fig. 3A und 3B show the headrest fitting in an intermediate position. Fig. 4A und 4B show the headrest fitting in the use position. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] Fig. 1 bis 3 show a piece of seating furniture 10 designed as a sofa and having two headrests 30 constructed according to the invention. The sofa design is purely exemplary. A design as an armchair with only one headrest is also possible.

[0040] The piece of seating furniture 10 has a base 12 for stationary or, in the case of an armchair, rotatable installation. A backrest 16 is provided behind a seat 14, the backrest being designed to be Fig. 1 bis 3 consists of a back panel 16A and back cushions 16B. An integrated design without separate back cushions 16B is also possible.

[0041] Recesses or depressions 17 are provided in the rear wall 16A to accommodate the headrests 30 when they are in an unused stowed position. From this stowed position, the headrests can be transferred separately into a use position, as the sequence of Fig. 1 bis 3 shows.

[0042] For this purpose, the headrests are displaced by means of two first guide plates 44 and two second guide plates 46. The specific design of the guide plates 44, 46 and the driving of the guide plates will be explained below. Already in connection with the Fig. 1 bis 3 However, it should be noted that the first guide tabs 44 form the outer guide tabs, which are pivotally connected to side surfaces 36. The second guide tabs 46, in contrast, form inwardly offset guide tabs, whose articulation to the headrest 30 takes place in an interior region of the headrest 30 and is therefore not visible from the outside. In the transverse direction Z of the furniture, the guide tabs 44, 46 are spaced apart from one another, preferably by approximately 20 mm to 30 mm, in order to avoid the risk of something, in particular a person's finger, becoming trapped between the guide tabs 44, 46.

[0043] As shown by the Fig. 1 bis 3 As can be seen, the transfer of the headrests 30 takes place with the same orientation of the headrest 30 in space, i.e. in the form of a parallel displacement. This means that a rear side 34 of the headrest also in the stowed position of the Fig. 1A has a rearward-facing orientation relative to the furniture's longitudinal direction X and this during transfer via the intermediate state of Fig. 1B and until the Fig. 1C retains.

[0044] This ensures that the rear side 34 of the headrest 30, in the stowed position, is a flush part of a rear end surface 20 of the piece of seating furniture 10, in which the recess 17 is provided.

[0045] Figures 2A to 4D illustrate the mechanism by which the headrest 30 is guided and driven. Fig. 2A und 2B the headrest 30 in its stowed position according to the Fig. 1A . The Fig. 4A und 4B show the headrest 30 in the use position according to the Fig. 1C . The Fig. 3A und 3B illustrate an intermediate state that is similar to that of Fig. 1B corresponds.

[0046] Referring to the Fig. 2A und 2B The components of this mechanism are first explained.

[0047] As already explained, the mechanism of each headrest comprises two first guide tabs 44 and two second guide tabs 46. In the following, reference is made in the singular to only one guide tab at a time, with the other guide tab having an identical movement sequence.

[0048] The two guide tabs 44, 46 are pivotally mounted on the backrest 16, with the respective pivot axes 44A, 46A located within the rear wall 16A and thus not visible from the outside. Attachment to the backrest 16 is achieved by means of a fitting plate (not specified in more detail), which can be attached to an internal frame of the piece of furniture.

[0049] The two pivot axes 44A and 46A are vertically offset from each other. The distance and relative orientation of the pivot axes 44A and 46A to each other corresponds to the distance and orientation of the pivot axes 44B, 46B, about which the guide tabs 44, 46 are pivotally mounted on the headrest. Likewise, the distance between the two pivot axes 44A, 44B of the first guide tab 44 corresponds to the distance between the two pivot axes 46A, 46B of the second guide tab. The pivot axes 44A, 44B, 46A, 46B are thus arranged in a parallelogram configuration. This achieves the parallel displacement explained above.

[0050] In the stowed position of the Fig. 2A und 2B Both guide tabs 44, 46 have a rearwardly sloping orientation. This means that the pivot axes 44B, 46B are each arranged below the pivot axes 44A, 44B.

[0051] How the transition from the Fig. 2B about the Fig. 3B up to Fig. 4B shows, the guide tabs 44, 46 pivot when transferring to the use position of the headrest according to Fig. 4B by approximately 135°. This allows the headrest 30 to initially be raised largely vertically and then displaced forward over an upper end surface 22 of the backrest 16, so that in the use position it assumes a substantially flush arrangement relative to a backrest support surface, thus enabling a normal sitting position with the head resting against it.

[0052] In order to be able to provide such a large pivoting angle, it is provided that an electric motor 80 does not act directly on one of the guide tabs.

[0053] Instead, an electric motor 80 is provided to initially actuate a drive lever 60, which then in turn drives the guide bracket 46. The drive lever 60, like the guide brackets 44, 46, is pivotally mounted on the backrest or the fitting plate thereon about a pivot axis 60A.

[0054] A linearly movable output member 82 of the electric motor 80 is pivotally connected to the drive lever 60 about a pivot axis 82A. If the output member 82 is extended, the drive lever 60 pivots. As can be seen from the sequence of Fig. 2 bis 4 As can be seen, the drive lever pivots by approximately 90°.

[0055] The pivoting movement of the drive lever 60 is used to drive the guide plate 46. For the purpose of power transmission, the drive lever 60 has a guide track in the form of an elongated hole 62. A guide roller 47 is guided in this elongated hole 62 and is rotatably attached to the guide plate 46. Fig. 2B The position of the cam roller 47 is indicated by a reference symbol. However, the cam roller 47 itself is not visible here, as it is concealed by the connecting tab 70, which will be described below.

[0056] When the headrest 30 is arranged in the stowed position according to the condition of the Fig. 2A und 2B The cam roller 47 is arranged at an inner end of the elongated hole 62. As soon as the pivoting movement of the drive lever 60 begins with the extension of the output member 82, the guide plate 46 is also pivoted, with its angular velocity being higher than that of the drive lever 60, since the pivot axis 46A is arranged closer to the elongated hole 62 and the cam roller 47 than the pivot axis 60A of the drive lever 60.

[0057] This leads to the fact that in the intermediate state of Fig. 3A und 3B The drive lever is only pivoted 45° from its initial position, while the guide plate 46 and thus also the guide plate 44 have already pivoted 75°. During this first phase of movement, the link slider 47 moves toward the outer end of the elongated hole 62. When the pivot axes 60A, 46A and the rotation axis of the link roller 47 are aligned, the link roller has reached its outer end position in the elongated hole 62.

[0058] As the output member 82 of the electric motor 80 continues to move, the drive lever 60 is also pivoted further. In this second phase of the movement, the cam roller 47 returns toward its inner end position.

[0059] As the movement continues, a change occurs between the state of Fig. 3A, 3B and the Fig. 4A, 4B to a special arrangement of the pivot axes, in which all four pivot axes 44A, 44B, 46A, 46B are aligned with each other. The parallelogram shape described above becomes a line, as it were, since the interior angles in this special configuration are 0° and 180°, respectively.

[0060] The intermediate position is problematic with a pure parallelogram, as the system cannot absorb forces perpendicular to the imaginary line crossed by all four pivot axes. Thus, in the case of the headrest, it cannot absorb forces acting on the headrest from the front. Even if the angle is not 0°, but below 20°, stability is noticeably limited.

[0061] To prevent this, the fitting has the aforementioned connecting bracket 70. This creates a third connection between the guide brackets in addition to the backrest and the headrest, so that several parallelograms are formed, as it were, which can absorb the forces acting on the headrest in each intermediate position.

[0062] In order to promote stability, the pivot axes 70A, 70B are offset in the said intermediate position by at least 20 mm and in this case by more than 40 mm relative to an imaginary connecting line between the pivot axes 44A, 44B, 46A, 46B.

[0063] The continued movement therefore takes place safely beyond this intermediate position to the state of Fig. 4A und 4B and the use position of the headrest 30 achieved here. The headrest is now aligned with the front contact surface of the backrest and is suitable for safely and stably transferring the forces acting on it to the guide tabs and via them into the backrest.

Claims

1. A piece of seating furniture (10), in particular in the form of an armchair or a sofa, having the following features: a. the piece of seating furniture (10) has a seat (14) and a backrest (16), and b. the piece of seating furniture (10) has at least one headrest (30) which is displaceable relative to the backrest (16) between a storage position and a use position, and c. in the use position, the headrest (30) is in a position in which a head contact surface (32) of the headrest (30) is substantially aligned with a back contact surface (18) of the backrest (16), and d. in the storage position, the headrest (30) is lowered relative to the use position, e. to guide the headrest (30) between the storage position and the use position, at least one first guide tab (44) and at least one second guide tab (46) are provided, which can be pivoted about a first or second position, respectively.a second pivot axis (44A, 46A) are pivotally mounted on the backrest (16) and which are pivotally mounted on the headrest (30) about a third and a fourth pivot axis (44B, 46B), respectively, wherein preferably two first guide tabs (44) and two second guide tabs are provided for parallel, bilateral guidance of the headrest (30). characterized by the following further feature: f. the distance between the first and the third pivot axes (44A, 44B) and between the second and the fourth pivot axes (46A, 46B) as well as the distance between the first and the second pivot axes (44A, 44B) on the backrest (16) and the distance between the third and the fourth pivot axes (46A, 46B) on the headrest (30) are selected such that the headrest (30) is pivoted by less than 20° in the use position compared to the stowed position.

2. A piece of seating furniture (10) according to claim 1, having the following additional features: a. the headrest (30) has a rear side (34) opposite the head support surface (32), and b. when the headrest (30) is arranged in the stowed position, the rear side (34) forms part of a rear end surface of the piece of seating furniture (10).

3. A piece of seating furniture (10) according to claim 1 or 2, with the following additional feature: a. a recess (17) is provided on the rear side of the backrest (16), in which recess the headrest (30) is at least predominantly arranged in its stowed position, preferably with the following additional features: b. the rear side of the backrest (16) forms an end surface (20) to the side of the recess (17) and / or below the recess (17), wherein the rear side (34) of the headrest (30) protrudes beyond this end surface (20) by no more than 20 mm in the stowed position relative to a longitudinal direction of the furniture or is set back by no more than 20 mm relative to this end surface (20), and / or c. the recess (17) is adapted to the shape of the headrest (30) such that the headrest (30) fills at least 90% of the volume of the recess in the stowed position.

4. A piece of seating furniture (10) according to one of the preceding claims, with the following additional features: a. a motor (80) is provided for displacing the headrest (30), and b. the motor (80) is indirectly coupled to one of the guide plates (46), the coupling being effected via a drive lever (60) which is attached to the backrest (16) so as to be pivotable about a pivot axis (60A), and c. the motor (80) acts on the drive lever (60), which in turn acts on the guide plate (46), preferably with the following additional feature: d. the motor (80) is designed as an electric motor, in particular as a linear motor with an output member (82) which can be extended and retracted in a linear manner by an electric motor.

5. A piece of seating furniture (10) according to claim 4 with the following further feature: a. the drive lever (60) acts on the guide plate (46), wherein for this purpose a guide track (62) is provided on the drive lever (60) or on the guide plate (46), in which a guide slider or a guide roller (47) of the guide plate (46) or of the drive lever (60) is guided.

6. A piece of seating furniture (10) according to claim 5, having the following further feature: a. a distance between the guide slider or the guide roller (47) and the pivot axis (60A) of the drive lever (60) is at least temporarily and preferably at any time during the transfer of the headrest (30) from the stowed position to the use position greater than a distance between the guide slider or the guide roller (47) and the backrest-side pivot axis (46A) of the guide bracket (46) driven by the drive lever (60).

7. A piece of seating furniture (10) according to one of the preceding claims, with the following additional features: a. the drive lever (60) is designed such that it is pivoted through an angle of less than 120° when the headrest (30) is transferred from the stowed position into the use position, preferably through an angle between 75° and 110°, and b. the guide tab (46) driven by means of the drive lever (60) is pivotally mounted on the backrest (16) and driven by the drive lever (60) such that it is pivoted through an angle of more than 120° when the headrest (30) is transferred from the stowed position into the use position, preferably through an angle between 130° and 150°.

8. A piece of seating furniture (10) according to any one of the preceding claims, having the following additional feature: a. the pivot axes (44A, 44B, 46A, 46B) form a quadrilateral, the lengths of each of the opposite edges of which differ from one another by no more than 10%, preferably by no more than 5%, preferably having the following additional feature: b. the pivot axes (44A, 44B, 46A, 46B) form a parallelogram, the lengths of each of the opposite edges of which have identical lengths.

9. A piece of seating furniture (10) according to claim 8 with the following further feature: a. when the headrest (30) is transferred from the storage position into the use position, the pivot axes (44A, 44B, 46A, 46B) temporarily reach an extended configuration in which connecting lines between the first and the second pivot axes (44A, 46A) and between the third and the fourth pivot axes (44B, 46B) each enclose an angle of less than 10°, preferably an angle of less than 5°, with connecting lines between the first pivot axis (44A) and the third pivot axis (44B) and between the second pivot axis (46A) and the fourth pivot axis (46B).

10. A piece of seating furniture (10) according to claim 9, having the following further feature: a. a securing member (70) is provided which, in the extended configuration, prevents the guide tabs (44, 46) from rolling over into a crossing configuration.

11. A piece of seating furniture (10) according to claim 10, with the following additional feature: a. the securing member (70) is designed as a connecting tab (70) which is pivotally attached to the first guide tab (44) and the second guide tab (46), wherein the connecting tab (70) is preferably arranged within the backrest (16) at all times during the transfer of the headrest (30) from the stored state to the use state, preferably with at least one of the following additional features: b. the pivot axis (70A) of the securing member (70) on the first guide tab (44) is offset from a connecting line between the first pivot axis (44A) and the third pivot axis (44B), preferably by at least 20 mm, in particular preferably by at least 40 mm, and / or c.the pivot axis (70B) of the securing member (70) on the second guide tab (44) is offset from a connecting line between the second pivot axis (46A) and the fourth pivot axis (46B), preferably by at least 20 mm, particularly preferably by at least 40 mm.

12. A piece of seating furniture (10) according to claim 7, having the following further feature: a. the first guide tab (44) and the second guide tab (46) are spaced apart from one another with respect to a transverse direction (Z) of the furniture, preferably by at least 10 mm, in particular preferably by at least 18 mm.

13. A piece of seating furniture (10) according to one of the preceding claims, with the following further feature: a. one of the guide tabs (44) is pivotally connected to the outside of a side surface (36) of the headrest (30), preferably with the additional feature: b. the other guide tab (46) is pivotally connected in an interior space of the headrest (30) surrounded by outer surfaces (32, 34, 36) of the headrest (30), wherein in particular preferably a slot (35) is provided in the outer surface (32, 34, 36) of the headrest (30) for the passage of this other guide tab (46).

14. A piece of seating furniture (10) according to any one of the preceding claims, having the following further feature: a. at least one of the guide tabs (44, 46) has a curved shape having a tab section (44C, 46C) of at least 12 cm in length, which, in the use position of the headrest (30), projects from behind over one upper end surface (22) of the backrest (16) and thereby encloses an angle of no more than 30° with a horizontal plane.

15. A piece of seating furniture (10) according to one of the preceding claims, having the following additional features: a. the head contact surface (32) of the headrest (30) is substantially flat, and / or b. the head contact surface (32) of the headrest (30) has a height of at least 25 cm, and / or c. the piece of seating furniture (10) is designed as a sofa and has at least two headrests (30), and / or d. the piece of seating furniture (10) has two first guide tabs and / or two second guide tabs for displacing a headrest, wherein preferably the first or the second guide tabs are pivotally coupled to one another via a connecting element, in particular in the manner of a torsion bar.

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