HEADREST

Description

[0001] The invention relates to a headrest for a vehicle seat. A vehicle within the meaning of the invention can be a land, air, or water vehicle.

[0002] DE 10 2018 109 611 A1 discloses a headrest comprising a headrest and a retaining element. The retaining element secures the headrest to the backrest of a vehicle seat. A seat occupant can support themselves on the headrest. The headrest is movable between a first position and a second position by means of a four-bar linkage, which comprises two links arranged one behind the other on each of the two side regions of the headrest.

[0003] The headrest can be moved between the first and second positions using an adjustment device. The adjustment device comprises a first guide bar firmly connected to a linkage, and a second guide bar firmly connected to the headrest or the support element. An adjusting element passes through both guide bars. The shape of the guide bars is determined by the relative position of the guide bars in all positions of movement between the first and second positions. The adjusting element is motor-driven, for example, by a spindle drive.

[0004] DE 10 2010 007 942 A1 describes a headrest with a headrest support element that is secured to a base of the headrest by a four-bar linkage. The four-bar linkage comprises a first pair of links and a second pair of links, each pair of links forming pivot axes with the base and the headrest support element. Locking structures are formed on one of the linkage pairs, which can be engaged with a latch pivotably mounted on the base to lock the headrest support element in the adjusted position.

[0005] DE 10 2018 005 316 A1 describes a headrest comprising a retaining element and a headrest. The headrest forms a four-bar linkage with the retaining element and a first link and a second link. The headrest has a movable latch with latch structures that can be releasably engaged with latch structures formed on one of the links.

[0006] CN 113 525 205 A describes a headrest from the prior art, which comprises a head part, a holding element, a four-bar mechanism and a drive mechanism.

[0007] The headrest should be further developed with regard to its adjustment options.

[0008] The object of the invention was to create a headrest which provides further advantageous embodiments with regard to its adjustment.

[0009] The problem was solved by a headrest having the features of claim 1.

[0010] The headrest comprises a headrest and a holding device with at least one holding element. The headrest forms a support for the occupant's head. The holding device is designed to support the headrest on a vehicle seat. The holding device is connected to the vehicle seat in a fixed or adjustable manner. For example, the holding device can be adjusted to different height positions relative to the vehicle seat and, if necessary, fixed in these positions.

[0011] With an adjustment device comprising a four-bar linkage with at least a first linkage and a second linkage, the head part is connected to the holding element so that it can move relative to the holding device between a first position and a second position on a coupling curve. Each linkage forms, for example, at least one pivot joint with the holding device and at least one pivot joint with the head part.

[0012] A drive device of the headrest is designed to adjust and / or lock the position of the head part relative to the holding part between the first position and the second position. The drive device comprises a guide, an adjusting element that engages the guide, and a guide that guides the guide along a path of movement between a primary position and a secondary position. The guide and the adjusting element are assigned to different components of the four-bar linkage.

[0013] According to the invention, the adjusting device comprises a link which is movably guided on a first component of the four-bar linkage device on a defined path and an adjusting element which is fixedly arranged on a second component of the four-bar linkage device and which engages in the link.

[0014] One advantage of the movable link is that a link component, which comprises the link, has large guide surfaces, allowing it to be guided along a component of the four-bar linkage. For example, the link can be guided along one of the holding device or head section, while the actuating element is mounted in a compact manner on another component of the four-bar linkage.

[0015] The gate is assigned to a gate component, for example. In other words, the gate is movably guided on one of the components of the four-bar linkage and formed as a separate component.

[0016] The link is movably guided, for example, on the holding element, on the head section, or on one of the linkages, i.e., on the first linkage or the second linkage. The adjusting element is firmly connected, for example, to another component of the four-bar linkage, i.e., to the holding element, to one of the linkages, or alternatively, to the head section. It is essential that the guide of the link and the adjusting element are assigned to different components of the four-bar linkage.

[0017] Component pairings in which the path between the actuator and the gate continuously increases or decreases as the head section moves between the first and second positions are advantageous. These are, for example, pairings between the head section or holding device and one of the links, or pairings between two links.

[0018] For example, an embodiment is possible in which the guide rail is movably guided on the headrest or on the support element, and the adjusting element is fixedly connected to one of the linkage devices. Alternatively, the guide rail can be movably guided on one of the linkage devices, and the adjusting element is fixedly mounted on the support element or on the headrest. In this embodiment, too, an arrangement of the guide rail and adjusting element close together is possible. Furthermore, this embodiment offers great flexibility in the design of the headrest.

[0019] Pairings between the headrest and the holding device or between the first handlebar and the second handlebar of different handlebar devices are also possible.

[0020] The gate can be moved, for example, along a linear path. Linear movement places minimal demands on the guidance of the gate or actuator. Furthermore, the drive can be implemented using a conventional linear drive, which reduces design effort. Alternatively, the gate can also be moved translationally along a nonlinear path. This could be, for example, a curved path or a freely formed path.

[0021] The movable link is guided along a movement path, for example, in the form of a second link fixedly attached to one of the components of the four-bar linkage. Within the meaning of the invention, a link is understood to be any form of path limitation by which surfaces of a link component in which the link is formed are movably guided. The path limitations only allow movement along a movement path in opposite directions.

[0022] A longitudinal center axis of the guide is constructed according to a path of motion that an actuator moves relative to a guide component or structure while the head part moves between the first position and the second position, and while the guide component simultaneously moves between a primary position and a secondary position within the guide. In other words, while the head part moves between the first and second positions, the guide component also moves relative to the guide between the primary and secondary positions. The path of motion traversed by the actuator relative to the guide component determines the shape of the guide.

[0023] For example, the links of the four-bar linkage can be either the same or different lengths. These features can be used to influence the coupling curve of the four-bar linkage and thus the movement of the head section.

[0024] For example, the links of the four-bar linkage are arranged parallel or non-parallel to each other. These characteristics can also influence the coupling curve of the four-bar linkage.

[0025] According to one embodiment, each linkage device has at least two links arranged offset transversely to the adjustment direction, with a first linkage being hinged to a first side region of the head part and a second linkage being hinged to a second side region of the head part. The links arranged offset transversely to the adjustment direction are connected to the head part, for example, only by the hinges. According to an alternative embodiment, they can have additional connecting struts for stiffening.

[0026] The holding device, for example, is adjustably mounted on the vehicle seat. These features allow, in addition to movement in opposite horizontal directions x1 and x2, adjustment of the headrest in opposite vertical directions z1 and z2.

[0027] At least two linkages of the four-bar linkage are arranged one behind the other in the adjustment direction. The linkages are aligned approximately vertically in a middle position, for example. With an approximately vertical arrangement of the linkages in the middle position, a very narrow design of the adjustment device can be achieved - viewed laterally.

[0028] The head section includes, for example, a head support plate and a rear extension. Alternatively or in addition to the aforementioned vertical adjustment, the head support plate is mounted so it can move relative to the extension. This provides an alternative or additional vertical adjustment option. In the latter case, the vertical adjustment range can be increased.

[0029] The actuator or the gate is driven, for example, by a drive of the drive device. The drive is not important for the invention. Any suitable drive can be selected. The drive comprises, for example, a motor and a gear. Spindle, rack, belt, chain, or cable drives can be used.

[0030] In addition, a control system is provided which regulates the motor functions, e.g. switches the motor on and off and, if necessary, regulates the direction of rotation of the motor.

[0031] The control can be operated, for example, from a control element that is arranged in the vehicle interior, e.g. on a vehicle seat provided with a headrest.

[0032] Embodiments of the invention are described by way of example in the following description of the figures, also with reference to the drawings. For the sake of clarity, identical or comparable parts, elements, or regions are designated by identical reference numerals, sometimes with the addition of lowercase letters or apostrophes.

[0033] Features described only with reference to one embodiment may also be provided in any other embodiment of the invention within the scope of the invention. Such modified embodiments—even if not shown in the drawings—are encompassed by the invention as long as the resulting headrest falls within the scope of protection defined by the claims.

[0034] They show: Fig. 1 a side view of a first embodiment of the headrest according to the invention, wherein a head part is in a rear position and wherein a link component is movably guided on a handlebar, Fig. 2 a view of the headrest according to arrow A in Fig. 1 , whereby the header is not shown in full for the sake of clarity, Fig. 3 a side view according to Fig. 1 , with the headboard in a middle position between the rear and a front position, Fig. 4 a side view according to Fig. 3 , with the headboard in the front position, Fig. 5 a side view of a second embodiment of the headrest according to the invention, wherein the head part is in a rear position, and wherein the link component is movably guided on the holding device, Fig. 6 a side view according to Fig. 5 , with the headboard in a middle position between the rear and a front position, Fig. 7 a side view according to Fig. 5 , with the headboard in the front position. Fig. 8 a side view of a third embodiment of the headrest, wherein the head part is in a rear position, and wherein the link component is movably guided on the head support part, Fig. 9 a side view according to Fig. 8 , with the headboard in a middle position between the rear and a front position, Fig. 10 a side view according to Fig. 8 , with the headboard in the front position. Fig. 11 a side view of a fourth embodiment of the headrest, with the head part in the front position, Fig. 12 a side view according to Fig. 11 , with the headboard in a rear position.

[0035] A headrest according to a first embodiment is designated in the figures by the reference numeral 10.

[0036] The headrest 10 comprises according to Fig. 1 a head part 11 with a head support surface 12. The head support surface 12 forms an abutment for the head of an occupant of a vehicle seat (not shown), to which the headrest 10 can be fastened. The headrest 10 further comprises a holding device 33 with at least one holding element 13, which provides means for the adjustable or non-adjustable fastening of the headrest 10 to the vehicle seat. For example, the holding device 33 or the holding element 13 is vertically adjustable in directions z1 and z2 relative to the vehicle seat—in particular to a backrest of the vehicle seat.

[0037] By means of an adjustment device 20 comprising a four-bar linkage 14, the head part 11 is movable on a coupling curve in the directions x1 and x2 between a first rear and a second front position. The four-bar linkage 14 comprises a first linkage device 15 and a second linkage device 16. The linkage device 15 forms a pivot joint G1 with a pivot axis a1 together with the holding device 33, and a pivot joint G2 with a pivot axis a2 together with the head part 11. The linkage device 16 also forms a pivot joint G3 with a pivot axis a3 together with the holding device 33, and a pivot joint G4 with a pivot axis a4 together with the head part 11.

[0038] In this exemplary embodiment, the longitudinal axes m1 and m2 of the linkage devices 15 and 16 are parallel to one another. According to an alternative embodiment, the longitudinal axes m1 and m2 could also be configured such that a trapezoidal four-bar linkage is formed between the holding element 13 and the head part 11, i.e., the longitudinal axes m1 and m2 are not parallel. In this case, the distance between the joints G1 and G3 would be unequal to the distance between the joints G2 and G4, whereby the distance between the joints G1 and G3 can be greater or lesser than the distance between the joints G2 and G4.

[0039] The linkage device 15 has a length L1 between the joints G1 and G2, and the linkage device 16 has a length L2 between the joints G3 and G4. In the present embodiment, the lengths L1 and L2 are equal. However, the length L1 can be greater or lesser than the length L2 according to alternative embodiments.

[0040] For example, the steering device 15 can have at least two parallel steering arms 24 transverse to the adjustment direction x1 and x2 (see Fig. 2 ), wherein one link 24 is articulated to a side region 34a and one link 24 is articulated to a side region 34b of the head part 11. Likewise, the link device 16 can have one or at least two link arms 24 parallel to the adjustment direction, so that adjustment devices 20 are present. All link arms 24 of the link device 15 form, for example, pivot joints G1 with the holding device 33 and pivot joints G2 with the head part 11. Correspondingly, all link arms 24 of the link device 16 form pivot joints G3 with the holding device 33 and pivot joints G4 with the head part 11. The parallel link arms 24 of the link devices 15 and 16 are spaced from one another, for example with respect to the y-direction.

[0041] In the present embodiment, the head part 11 comprises a rear extension 22, which forms the pivot joints G2 and G4 with the linkage devices 15 and 16. The head part 11 is thus mounted on a coupling curve between the first rear position (see Fig. 1 ) and the second front position (see Fig. 4 ) movable. The parts comprised by the four-bar linkage 14, namely head part 11, holding device 33, linkage device 15, and linkage device 16, have a defined relative position to one another in every position of the head part 11.

[0042] Each of the defined relative positions of the four-bar linkage 14 can be adjusted using a drive device 30. While the adjustment device 20 is designed as described above in all described embodiments, different variants of the drive devices 30, 30', 30", and 30‴ that are essential to the invention are described below.

[0043] The drive device 30 comprises a link 18 with a longitudinal axis m3, on one of the elements of the four-bar linkage 14, and an adjusting element 17, which engages in the link 18 such that it can be guided by the link 18. The adjusting element 17 is assigned to another of the elements of the four-bar linkage 14.

[0044] At a first in the Fig. 1 bis 4 In the illustrated embodiment of the headrest 10, the link 18 is movably guided by a guide 21 on one of the link devices 15 or 16, here with the link device 15. In the present example, each adjusting device 20 is assigned an adjusting element 17 and a link component 19. The adjusting element 17 is fixedly connected to the holding element 13. A drive 23, which will be explained further below, is provided to move a link component 19 on which the link 18 is formed.

[0045] In principle, the link component 19 can be guided along any desired path. For the sake of simplicity, the link component 19 in the first embodiment is guided on a linear path by means of the guide 21 and moves between a primary position and a secondary position along a longitudinal axis that is parallel to the longitudinal axis m1. The actuating element 17 engages in the link 18 and is immovably connected to the holding element 13. The guide 21 is only in Fig. 1 recognizable and indicated schematically with broken lines.

[0046] The actuating element 17 moves during the movement of the link component 19 from the primary position to the secondary position relative to the link 18 from a first end region 26 to a second end region 27 of the link 18. The movement of the actuating element 17 between the primary position and the secondary position occurs in order to move the head part 11 from the first position to the second position.

[0047] In the present example, the gate 18 is formed in a separate gate component 19, which is movably guided on the linkage device 15. The actuating element 17, which is immovably held on the holding element 13, engages the gate 18.

[0048] According to Fig. 1 the adjusting element 17 is located at the end region 26 of the gate 18 in the primary position, with the head part 11 in the first position. In Fig. 3 The gate component 19 was moved in the direction q1 such that the adjusting element 17 was arranged in a central region of the gate 18. The head part 11 was thereby adjusted to a central position between the first position and the second position. A movement of the gate component 19 in the direction q1 into a secondary position (see Fig. 4 ) such that the adjusting element 17 is arranged in the end region 27 of the link 18, results in a movement of the head part 11 into the second position.

[0049] The reverse movement of the link component 19 in the sense that the adjusting element 17 moves relative to the link 18 from the second end region 27 to the first end region 26 results in an adjustment of the head part 11 in the direction x2 from the second position to the first position.

[0050] When the head part 11 moves between the first position and the second position, the head part 11 is moved in the x1 direction and also slightly adjusted in the z1 and z2 directions. This is caused by the pivoting movement of the linkage device 15 about the pivot axis a1 and the pivoting movement of the linkage device 16 about the pivot axis a3. Therefore, joint G2 performs a circular movement around the pivot axis a1, and joint G4 performs a circular movement around the pivot axis a3.

[0051] A second embodiment of the headrest 110 is shown in the Fig. 5 bis 7 shown. In the second embodiment, the adjusting device 20 is designed as in the first example. The second embodiment differs with regard to the drive device. According to a drive device 30' of the second embodiment (see Fig. 5 ) the adjusting element 17' is immovably connected to the linkage device 16, and the guide 18' is movably guided on the holding element 13 by means of a guide 21*. The guide 18' is formed here on a guide component 19'.

[0052] By means of a drive 23, which will be discussed in more detail below, the link 18 is movable along a path defined by the guide 21'. According to the invention, the path can be a translational, a rotational, or even a mixed movement with translational and rotational components. In this embodiment, the link 18' is guided by the guide 21' along a linear path. This enables the movement of the link 18' by means of a linear drive.

[0053] The adjusting element 17' fixedly arranged on the handlebar device 16 engages in the link 18', which is assigned to the link component 19', which is guided by the guide 21' on the holding element 13.

[0054] During the movement of the head part 11 from the first position to the second position and a simultaneous movement of the link component 19' relative to the actuating element 17' from a primary position to a secondary position, the actuating element 17' moves within the link 18' between a first end region 26 and a second end region 27 and in the process forces the four-bar linkage 14 into specific positions.

[0055] According to Fig. 5 The head part 11 is in the first position. The adjusting element 17' is arranged at the end region 26 of the guide 18'. If the guide component 19' is moved in the direction q1, the head part 11 is displaced in the direction x1. According to Fig. 6 the head part 11 is displaced into a middle position between the first position and the second position. The adjusting element 17' is positioned approximately in the middle of the gate 18'. A further movement of the gate component 19' in the direction q1 results in the head part 11 being displaced into the second position in the direction x1 (see Fig. 7 ). The adjusting element 17' is then located at the end area 27 of the link 18'.

[0056] If the link component 19' is moved in direction q2 from the secondary position to the primary position, the head part moves from the second position to the first position.

[0057] A third embodiment of the headrest 210 is shown in the Fig. 8 bis 10 While the adjusting device 20 is designed according to the first and second embodiments, there are differences with regard to the drive device 30". In this embodiment, the adjusting element 17" is fixed, ie immovably held relative to the link device 16 on the link device 16. A link component 19" with a link 18" is guided on the head part 12 by means of a guide 21" so as to be movable relative to the head part 11. Upon movement of the link component 19" in the direction q2, the head part 11 is moved from the first position according to Fig. 8 about the position according to Fig. 9 into the second position according to Fig. 10 The drive device 30" can, for example, have a drive 23 which corresponds to the first and second embodiments.

[0058] Deviating from the previously described embodiments, other configurations of the drive devices 30, 30' and 30" are possible.

[0059] For example, in a modification of the first embodiment, the following constellations are possible.

[0060] As an alternative to the first embodiment, the adjusting element 17 could also be held on the head part 11 and be immovable relative thereto. According to a further alternative, the link component 19 could be movably guided on the link 16, and the adjusting element 17 could be fixedly connected to the holding element 13 or to the head part 11. The remaining features of these modifications correspond to those of the first embodiment.

[0061] In a modification of the second embodiment, the following configurations are possible, for example. According to a further embodiment, the link component 19' is movably attached to the holding element 13, and the adjusting element 17' is fixedly attached to the steering device 15.

[0062] According to a further alternative embodiment, for example, the link component 19' is movable on the head part 11, and the adjusting element 17' is fixedly arranged on one of the links 15. The remaining features of these modifications correspond to those of the second embodiment.

[0063] The movable link component 19' can in principle be connected to the holding element 13 or the head part 11 and the adjusting element 17' can be firmly connected to one of the link devices 15 or 16.

[0064] The movable link component 19' can also be movably guided on one of the link devices 15 or 16 and the adjusting element 17' can be firmly connected to one of the components holding device 33 or head part 11.

[0065] According to a further alternative embodiment of the headrest 310 with a drive device 30'", which is shown in the Fig. 11 and 12 As shown, the adjusting element 17‴ is held firmly on a first link and the link component 19‴ is movably guided on a second link. In the present example, the adjusting element 17‴ is movably guided on the link 15 and the link component 19‴ is movably guided on the link 16. Alternatively, however, the link component could also be movably guided on the link 15 and the adjusting element could also be held immovably relative to the link 16 on the link 16.

[0066] In this variant, the holding element 13‴ is formed by an inclined plane, wherein, in a first end position, the adjusting device 20‴ is positioned such that the center axes m1 and m2 of the links 15 and 16 are perpendicular to the inclined plane. This has the advantage that the distance between the links 15 and 16 continuously decreases during the movement from the first end position to the second end position and continuously increases during the movement from the second end position to the first end position. This significantly simplifies control. All other components of the headrest have remained unchanged.

[0067] A height adjustment of the head part 11 in the directions z1 and z2 can take place independently of the design of the drive device 30, 30' and 30" and the position of the adjustment device 20, in that the holding element 13 is adjustable in the directions z1 and z2. For this purpose, the holding element 13 can be provided with support rods which can be fastened in guide sleeves fixed to the backrest at various height positions, e.g. by means of a locking device in a known manner.

[0068] Alternatively or additionally, a head support plate 28 can be guided on the extension 22 so as to be adjustable relative to the extension 22 in the directions v1 and v2. For this purpose, the head support plate 28 can have guide elements (not shown) that interact with guide elements on the extension 22. By means of a fixing device, the head support plate 28 can be fixed, for example, in several stages or continuously in the respective relative position to the extension 22.

[0069] The drive device 30 comprises, for example, a drive 23 with a motor 25 and a gear 29 for displacing the link component 19'. The drive 23 is not essential to the invention, ie, suitable elements can be selected.

[0070] For a linear adjustment, for example, a spindle drive is suitable as a gear 29, wherein the motor 25 drives a spindle 31 or a spindle nut 32, to which the link component 19' is connected. For example, according to Fig. 2 The threaded spindle 31 is rotatably driven by the motor 25, so that the spindle nut 32, whose thread engages with the thread of the spindle nut 32, moves parallel to the longitudinal axis m2. The spindle nut 32 is connected to the link component 19, 19', or 19" in such a way that the link component moves in the desired direction, depending on the direction of rotation of the spindle 31.

[0071] A spindle drive, for example, has the advantage that the self-locking mechanism secures the head section 11 in the adjusted position. In other words, no separate locking device is required to secure the head section in the adjusted position.

[0072] If the link component 19 is guided on a non-linear path, a linear drive can be used, for example, which is mounted so that it can move, that a drive part can follow the link component 19.

[0073] In order to reduce the forces acting between the link 18 and the link element 25, at least two links 18, 18' or 18" and a corresponding number of adjusting elements 17, 17' or 17" can be provided in all exemplary embodiments. For example, a first movably guided link 18' interacts with an adjusting element 17' that is fixedly arranged on the first link device 15, and a second link 18' that is guided and moved parallel to the first link 18' interacts with an adjusting element 17' that is fixedly connected to the second link device 16 or to a link that is offset transversely to the direction of movement relative to the link 15 or 16.

Claims

1. Headrest with a head part (11) and with a holding device (33) comprising at least one holding element (13) for the immoveable or adjustable mounting of the head part (11) on a vehicle seat and with an adjustment device (20) comprising a four-articulation device (14) with at least one first control arm device (15) and one second control arm device (16) with which the head part (11) is connected to the holding element (13) so as to be moveable relative to the holding element (13) between a first position and a second position, with a drive device (30, 30') with which the position of the head part (11) can be altered and / or fixed relative to the holding element (13) between the first position and the second position, characterized in that the drive device (30, 30') comprises a link (18, 18') which is guided on a first component of the four-articulation device (14) so as to be moveable by means of a guide (21, 21') on a defined path and in that an adjusting element (17, 17') which engages in the link (18, 18') is fixedly arranged on a second component of the four-articulation device (14).

2. Headrest according to claim 1, characterized in that the link (18, 18') is guided so as to be moveable on the holding element (13) or on the head part (11) and the adjusting element (17, 17') is fixedly connected to one of the control arm devices (15, 16) or in that the link (18, 18') is guided so as to be moveable on one of the control arm devices (15, 16) and the adjusting element (17, 17') is fixedly connected to the holding element (13) or to the head part (11).

3. Headrest according to one of the preceding claims, characterized in that the link (18, 18') is guided so as to be moveable on a first of the control arm devices (15, 16) and the adjusting element (17, 17') is fixedly connected to a second of the control arm devices (15, 16).

4. Headrest, characterized in that each control arm device (15, 16) forms at least one pivot joint (G1, G3) with the holding element (13) and at least one pivot joint (G2, G4) with the head part (11).

5. Headrest according to one of the preceding claims, characterized in that the link (18, 18') is linearly moveable by means of the guide (21, 21').

6. Headrest according to one of the preceding claims, characterized in that the guide (21, 21') for a link component (19, 19', 19") of the link (18, 18') is configured in the form of at least one second link, the adjusting element (17, 17') being guided in both links.

7. Headrest according to one of the preceding claims, characterized in that a longitudinal centre axis (m3) of the link (18, 18') is constructed according to a movement path which an adjusting element (17, 17') follows relative to a link component (19, 19') or a link structure, during which the head part (11) moves between the first position and the second position and while at the same time the adjusting element (17, 17') or the link component (19') moves between a primary position and a secondary position within the guide (21, 21').

8. Headrest according to one of the preceding claims, characterized in that the control arm devices (15, 16) of the four-articulation device (14) are of different lengths (L1, L2).

9. Headrest according to one of the preceding claims, characterized in that longitudinal centre axes (m1, m2) of the control arm devices (15, 16) of the four-articulation device (14) are arranged parallel or non-parallel to one another.

10. Headrest according to one of the preceding claims, characterized in that each control arm device (15, 16) has at least two control arms (24a, 24b) arranged offset transversely to an adjustment direction (x1, x2), a first control arm (24) being articulated to a first side region (34a) of the head part (11) and a second control arm (24) being articulated to a second side region (34b) of the head part (11).

11. Headrest according to one of the preceding claims, characterized in that the holding device (33) is adjustably mountable on a vehicle seat.

12. Headrest according to one of the preceding claims, characterized in that at least two articulations (G1, G3, G2, G4) of the four-articulation device (14) are arranged one behind the other in the adjustment direction.

13. Headrest according to one of the preceding claims, characterized in that a head support plate (28) is mounted so as to be moveable on the extension (22) relative to an extension (22) of the head part (11).

14. Headrest according to one of the preceding claims, characterized in that the adjusting element (17, 17') or the link (18, 18') is driven by a drive device (23) which comprises a motor (25) and a gear (29).

15. Headrest according to one of the preceding claims, characterized in that the drive device (30, 30') can be operated with an operating device.