WO2018077822A1

WO2018077822A1 - Headrest arrangement comprising a first and a second pivotable lifting element for adjusting a headrest body

Info

Publication number: WO2018077822A1
Application number: PCT/EP2017/077049
Authority: WO
Inventors: Gerald Terraz; Jürgen SCHUKALSKI
Original assignee: Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg
Priority date: 2016-10-24
Filing date: 2017-10-24
Publication date: 2018-05-03
Also published as: DE102016220880A1

Abstract

The invention relates to a headrest arrangement for a vehicle seat, having an adjustment device (1) for adjusting a headrest body (K) of a headrest of the vehicle seat, said headrest body being positionable above a backrest (R) of the vehicle seat. According to the invention, the adjustment device (1) comprises at least one first lifting element (12) and a second lifting element (13), which are mounted in a pivoting manner about various axes (G1, G2) on a carrier (11) that is to be associated with the backrest (R) in order to adjust the headrest body (K) and can be displaced relative to each other during pivoting about the various axes (G1, G2).

Description

Headrest assembly with first and second pivotable lever elements for the adjustment of a headrest body

description

The invention relates to a head restraint arrangement for a vehicle seat according to the preamble of claim 1.

Headrest assemblies on vehicle seats having an adjustable headrest body are well known. Usually, a headrest body positioned above the backrest of the vehicle seat is height adjustable. Optionally, the headrest body can also be adjusted by a seat occupant in its longitudinal position, i.e., forward and backward, and / or in its inclination. Usual here is the storage of the headrest body via two parallel support rods which are inserted in headrest bearings of the backrest and are held displaceable and lockable therein to extend the headrest body and retract can.

An adjusting device for adjusting the headrest body usually requires comparatively much installation space within the backrest and / or within the headrest body. Also, the previously implemented in practice Versteilvorrichtungen with their different adjustment mechanisms for adjusting the height of the headrest on the one hand and an adjustment of the longitudinal position of the headrest body on the other hand hardly freedom of design to vary the connection of the headrest assembly to the backrest of a vehicle seat. Page 2

The invention is therefore based on the object to provide an improved in this respect headrest assembly for a vehicle seat.

This object is achieved with a headrest assembly of claim 1.

An inventive head restraint assembly for a vehicle seat comprises an adjustment device for adjusting a positionable above a backrest of the vehicle seat head restraint body of a headrest of the vehicle seat. For the adjustment of the headrest body, the adjusting device comprises at least a first lever element and a second lever element, which are pivotally mounted about different axes on a backrest to be assigned carrier and during pivoting about the various axes relative to each other. The axes about which the first and second lever members are pivotally mounted on the carrier preferably extend parallel to one another, with the first and second lever members each extending substantially perpendicular to their respective (hinge / pivot) axis in the direction of the headrest body.

By providing for the adjustment of the headrest body at least two, first and second lever members which are pivotally mounted about different axes on a backrest to be assigned carrier and relative to each other during pivoting about the various axes are relatively displaced, a novel Kopfstützenverstellmechanik can be realized, the compact builds and comparatively high flexibility for the realization of different adjustment options for the headrest body offers.

The carrier on which the first and second lever elements are pivotally mounted, is in the intended mounted state of the head restraint assembly leaning. This includes in particular that the carrier is fixed as part of the headrest assembly to be mounted later on the backrest. Also included herein is that the carrier is formed by a part of the backrest to which the headrest assembly with its adjustment device is retrofitted. In this case, the carrier for the first and second lever elements may for example be integrated into a frame construction of the backrest. The carrier may in principle be fixed by means of separate fastening elements on a frame construction of the backrest, for example via screws, bolts or rivets. Likewise, a welding of the carrier to the frame structure of Page 3

Backrest possible. Likewise, the support may be a section of an upper backrest cross member of the backrest or a side support (for example in the form of a backrest spar) defining a backrest longitudinal side or a component fixed to such a cross member or side support.

The adjusting device can basically for the adjustment of the headrest

(A) implement a displacement of the first and second lever elements relative to each other in pivotal movements of the lever elements or

(B) allow pivotal movements of the first and second lever elements, which lead to a displacement of the first and second lever elements relative to each other.

A pivotal movement of the first and second lever elements takes place here in identical pivoting directions, ie, both for the first and the second lever element in the clockwise or counterclockwise direction to effect an adjustment of the headrest body. The abovementioned variants (a) and (b) are each suitable for both a manual and a power-operated headrest arrangement. In one exemplary embodiment, for example, the first variant (a) is provided for a power-operated adjustment of the headrest, in which the first and second lever elements are displaced by a headrest drive relative to each other displaced relative to each other, whereby pivotal movements of the lever elements are generated, which then lead to adjustment of the headrest body. The above-mentioned variant (b) is provided, for example, for a manually adjustable head restraint assembly in which a user engages the head rest body to displace it, for example, to adjust it in its longitudinal position, thereby introducing an adjustment force into the adjusting device that is to Pivoting movements of the first and second lever elements leads. With these pivotal movements then takes place a displacement of the first and second lever elements relative to each other to adjust the headrest body only along a predefined adjustment and preferably only translationally. In a variant embodiment, a parallelogram guide for the adjustable headrest body can be provided via the adjusting device. A lever mechanism of the adjusting device, which in particular includes the first and second lever elements, is thus arranged and provided, the headrest body with an adjustment relative to the carrier (and thus in the intended mounted state relative to the backrest of the vehicle seat) while maintaining its spatial position with respect to adjust the carrier to be assigned to the backrest. page 4

In particular, in this context it can be provided that at least one of the first and second lever elements is articulated to a headrest support, on which the headrest body is arranged. In one embodiment, the headrest body is immovably fixed to the headrest support. The headrest body can in this case be integrally formed with the headrest support or connected to a trained as a separate component headrest support. In an alternative embodiment, the headrest body is adjustably mounted on the headrest support, for example, for adjusting a height of the headrest when the headrest assembly is intended mounted on the vehicle seat.

By means of the adjusting device of the headrest body is in a variant on the vehicle seat, relative to a longitudinal axis, forward or backward adjustable and, relative to a distance to an upper end of the backrest of the vehicle seat, height adjustable when the headrest assembly is intended mounted on the vehicle seat. For the adjustment with respect to a longitudinal axis of the seat, by means of the adjusting device, a pivoting movement of the first and second lever elements can be converted into a translatory adjusting movement of the headrest body.

In the course of a compact design of the adjustment mechanism and a space-saving arrangement of the lever elements are the first and second pivotally mounted respectively on the backrest to be assigned carrier mounted lever elements in one embodiment to each other and thus are in direct contact. Alternatively or additionally, one of the lever elements can be accommodated at least partially in a cavity of the other lever element. In the last-mentioned variant, the lever element at least partially accommodated in the other lever element is then preferably held displaceably thereon in order to permit a relative movement between the first and second lever elements for the adjustment of the headrest body. The at least partially receiving the one lever element in the other lever element allows an aesthetically pleasing and constructive without additional housing components auskommende housing for parts of the lever mechanism formed by the first and second lever elements of the adjusting device. In this way, for example, in an intended mounted state of the headrest assembly only the one lever element which at least partially receives the other lever element, and the page 5

Headrest body to be visible on the backrest after proper installation of the headrest assembly.

In principle, a headrest arrangement according to the invention can be provided for a manual adjustment of the headrest body, or the headrest arrangement has a headrest drive for the power-operated adjustment of the headrest body. In the latter case, the head restraint drive, for example, the first and second lever elements adjustable relative to each other adjustable to pivot the lever elements and thereby the headrest body on the vehicle seat - based on a seat longitudinal axis - to move forward or back, if the headrest assembly intended on the vehicle seat is mounted. In this variant, an adjusting force is consequently generated by means of which the first and second lever elements are adjusted relative to one another in order thereby to effect pivoting movements of the first and second lever elements, which ultimately lead to the user-desired adjustment of the headrest body.

The headrest drive can in principle comprise at least one spindle gear via which an adjusting force is transmitted to the power-operated adjustment of the headrest body. About such a spindle gear, for example, a rotational movement of a motor shaft can be converted into a translational adjustment, which leads to a relative displacement of the first and second lever elements and thus for pivoting the lever elements about their axes on the carrier. Part of the spindle gear are at least a spindle nut and a drive spindle. The spindle nut of the spindle gear is arranged, for example, on one of the first and second lever elements and meshes with the drive spindle, which is arranged on the other lever element. From one, for example, electromotive, drive unit of the headrest drive then either the spindle nut or the drive spindle are driven to control an adjustment of the headrest body. In a further development, for example, the spindle nut is fixed to one of the first and second lever elements, and the drive spindle meshing therewith is arranged rotatably mounted on the other lever element. A possible parallelogram, which is realized by the adjusting device for the headrest body, for example, provides that one of the first and second lever elements is articulated to a headrest support on which the page 6

Headrest body is held and on the two coupled to the first and second lever elements - and preferably in the headrest body in each case at least partially received - pivot lever of the adjusting device are mounted pivotably about different axes. About the additional pivot lever of the adjusting device can be given an additional adjustment for the headrest body and / or achieved that the pivotal movements of the first and second lever elements, at one of which the headrest support is held in a purely translational adjustment of the headrest support (together with the Headrest body) - preferably parallel to the (hinge / pivot) axes of the pivot lever - is implemented. In a variant based thereon, according to a parallelogram guide, a first plane runs in which

- The axis about which the first lever member is pivotally mounted on the carrier, and

- The axis about which a first pivot lever is pivotally mounted on the headrest support lie,

parallel to a second level, in the

- The axis about which the second lever member is pivotally mounted on the lean carrier, and

- The axis about which a second pivot lever is pivotally mounted on the headrest support lie.

In one embodiment, a coupling of the two pivoting levers is provided with the first and second lever members, via which the two pivoting levers are driven to pivot about their axes on the headrest support, when the first and second lever elements about its axis (lean in the mounted state) Carrier pivoted and relocated relative to each other. Such a coupling may in particular be mechanical, e.g. be given by means of at least one spindle gear for a power-operated displacement of the first and second lever elements relative to each other.

For example, can be implemented by the coupling of the two pivotally mounted on the headrest support pivot lever with the pivotally mounted on the carrier first and second lever elements pivotal movement of the first and second lever elements in a purely translational adjustment of the headrest support and the headrest body arranged thereon. As a result, it is ensured via the two pivoting levers and their coupling with the first and second lever elements that the headrest body can be adjusted in its longitudinal position, but at the same time Page 7 maintains its spatial position with respect to the carrier and thus does not incline further in a Voroder or reset.

In one embodiment, one of the pivot levers for carrying out a pivoting movement is coupled to the headrest support with a drive spindle of a spindle gear. About the drive spindle in this case a displacement of the first and second lever elements relative to each other and the pivoting of the first and second lever elements about its axis on the carrier to be assigned to the backrest can be controlled. About the spindle gear synchronization between the pivotal movements of the first and second lever elements and the adjustment movements, in particular the pivoting movements of the two pivot levers is achieved. For example, this means that the pivoting angle about which a lever element on the one hand and one or both of the pivot lever for an adjustment of the headrest body are pivoted to be largely identical to each other. The coupling can contribute, in particular in combination with a parallelogram guide, to the fact that the headrest support remains in a predetermined position relative to the wear-resistant support in the assembled state and is only translationally adjusted while maintaining its orientation. For example, an output shaft is provided for the connection of the drive spindle with the pivot levers. This output shaft is rotatably connected in one embodiment with the drive spindle and rotatably mounted on a (second) pivot lever and secured axially thereto. On the output shaft, an external thread is provided, which meshes with a fixed spindle nut on the other (first) pivot lever, so that the output shaft is rotated out of the spindle nut of the one (first) pivot lever out or into this upon rotation of the drive spindle - and thus the output shaft and thus the pivot levers are displaced relative to each other. Due to the pivotal mounting of the two pivot levers on one and the same component in the form of the headrest support, a pivoting motion is imposed on the headrest support to the two pivot levers, which in combination with the pivoting movements of the first and second lever elements causes the headrest support with respect to its spatial position the reclining-side support retains, and a purely translational adjusting movement of the headrest support and the headrest body arranged thereon occurs perpendicular to the pivot axes of the pivot lever. page 8

In a refinement based thereon, the drive spindle is non-rotatably connected to the drive shaft via a form-fit region, but at the same time, for example in the manner of a splined shaft, axially displaceable relative thereto. For example, a relative movement of the two pivot levers and the headrest support relative to the drive spindle and the lever member to which it is arranged, allowed to allow adjustment of the distance of the headrest support from the lean-side support (and thus an adjustment of a height of the headrest) , In one embodiment variant, one of the pivot levers is displaceable relative to at least one of the first and second lever elements. The respective pivot lever is thus pivotally mounted on the headrest support about a pivot axis and at the same time to at least one of the first and second lever elements - possibly also to both lever elements - displaceable. A displacement of this pivot lever relative to at least one of the first and second lever elements is usually accompanied by a pivoting about its headrest support side pivot axis. The relative to at least one of the first and second lever elements slidable pivot lever can in this case be adjustable relative to the first and second lever elements for adjusting a height of the headrest body together with the headrest support and the other pivot lever, in particular power-operated and, for example by means of a (further) spindle gear , A spindle nut of the spindle gear can be used for this purpose, e.g. be arranged on the pivot lever, while a meshing with the spindle nut drive spindle of the spindle gear is arranged on one of the first and second lever elements. In one embodiment, the spindle nut of the pivot lever is held immovably on the pivot lever, for example by a positive connection, while the drive spindle is rotatably mounted on one of the first and second lever elements.

In principle, provision can be made for a headrest drive of the headrest arrangement to comprise two spindle drives. These two spindle gears are then preferably independently controllable to one hand to adjust a height of the headrest body by means of a first spindle gear and on the other hand to adjust a longitudinal position of the headrest body by means of a second spindle gear.

In one embodiment variant, the pivot lever, which is displaceable relative to at least one of the first and second lever elements, is displaceable on one of the lever elements Side 9 out and at least partially received in a defined by this lever element cavity. Consequently, not only a physical guidance for the one pivot lever is provided by a corresponding lever element. Rather, he also provides a protective housing-like housing, in the cavity of which a part of the pivoting lever is protected and preferably not visibly housed in the mounted state of the headrest assembly on the vehicle seat from the outside.

In particular, in such an embodiment variant, one of the first and second lever elements defines a housing extending between the headrest body and the backrest to be assigned housing having a cavity in which are received between the headrest body and the carrier extending components of the adjustment device. For this purpose, the lever element defining the housing can be designed, for example, in the manner of a connecting spar which, in the mounted state, extends between the upper side of the backrest and the headrest body and in which parts of the adjusting mechanism are accommodated. Such acting as a connecting member lever member is then articulated, for example, with one end to the lean side support and at another end to the headrest support. The adjustment mechanism of the adjusting device can hereby be housed completely in the connecting spar and the head restraint body respectively formed with the headrest body head box of the headrest. The adjusting mechanism of the adjusting device for height and length adjustment of the headrest body is in other words completely housed above the backrest, which in the backrest no additional space for the adjustment device is more needed, as is the case with conventional head restraint arrangements in practice.

In one embodiment, the first and second lever elements in a relative position to each other (rigid) lockable to fix the first and second lever members together and secure against pivoting and thus to lock an adjustment of the headrest body. For an adjustment of the headrest body, the locking of the first and second lever elements is releasable, so that the first and second lever elements are pivotable and displaceable relative to each other. This embodiment variant of the solution according to the invention is preferably likewise based on the provision of a parallelogram guide for the headrest body to be adjusted. Here is a variant for a purely translational Page 10

Adjusting the longitudinal position of the headrest body without additionally pivotally mounted pivot lever, which are coupled to first and second lever elements. For example, for this purpose, both the first and the second lever elements are additionally articulated to the headrest support of the headrest body, wherein one of the lever elements not only pivotally but also in each case displaceably mounted on a respective articulated connection to the lean in the assembled state support and on the headrest support. As a result, the corresponding lever element in each case has an additional degree of freedom at each articulated connection in order to be displaceable relative to the other lever element.

In this embodiment variant is particularly advantageous if the first and second lever elements at least partially abut directly against each other and thus - in the unlocked state - under abutment against each other are displaced relative to each other. The articulations of the first and second lever elements on the backrest to be assigned (leaning side) support and the headrest support but have spatially a greater distance from each other, so that the first and second lever elements in a cross-sectional view individually U- or C-shaped respectively in composite I- or X-shaped with the hinges provided on the lateral protruding portions. The respective axes about which the lever elements are pivotable and which are parallel to each other, are thus spaced from each other more spatially. In a side view thus, for example, the axes are provided on the right and left of a central axis along which portions of the two first and second lever elements abut each other. In side view thus have the first and second lever elements, for example, a left-side and right-side open C- or U-shaped contour respectively in combination an I- or X-shaped contour.

In one embodiment, the adjustment device comprises two pairs, each with a first and a second lever element, which can be locked together for locking the headrest body. A headrest support for the headrest body is in this case for example mounted on two pairs of first and second lever elements, which are each pivotally mounted on a back-side support. In this variant, therefore, in analogy to previously known from practice headrest assemblies two longitudinally extended at an upper edge of the backrest supports for the positioning of the headrest body is provided above the backrest. Each of these supports is, however, formed by a respective pair of first and second lever elements which are each pivotable and displaceable relative to each other, so that the adjustment mechanism is integrated into the supports themselves. Page 1 1

In a variant, at least one adjustable actuating element is provided on a headrest support for the headrest body in order to release the locking of the first and second lever elements. By adjusting the actuating element is thus a fixation of the first and second lever elements to each other solvable, so that the headrest body can be displaced by pivoting the first and second lever elements. The actuating element can in this case be translationally adjustable, for example. In one embodiment, the actuating element for releasing the lock in an actuating direction is adjustable and acts - optionally with the interposition of another element - together with at least one locking element by means of which the first and second lever elements are fixed to each other. In one embodiment variant, the locking element is adjustable in an actuating variant in the actuating direction in an adjustment direction extending substantially perpendicularly in order to release the fixing of the first and second lever elements to one another and to permit adjustment of the headrest body. The actuating element and the locking element are thus coupled to one another in this variant, that is adjusted by adjusting the actuating element in one direction, the locking element in the other, perpendicular thereto extending direction. In this way, the locking element can for example be arranged directly on the first and second lever elements in a region between the backrest-side support and the headrest support, while the actuating element is provided above thereof on the headrest body. The actuating element can be set up and provided in this context, for example, for a manual operation.

In a further development, a locking of the headrest body relative to the headrest support can be released via the actuating element. In this context, it can be provided that, by adjusting the actuating element in the actuating direction, both a locking of first and second lever elements is released to each other and in addition a locking of the headrest body is released relative to the headrest support. If, in this variant, an actuator is thus adjusted by a user, both a manual adjustment of the height of the headrest and a manual adjustment of the longitudinal positions of the headrest is possible, preferably as long as the actuator against a page 12

Neutral position remains adjusted and is held manually, for example, in an actuation or release position. In principle, the actuating element can in this case be resiliently biased into the neutral position, so that the actuating element automatically changes into its neutral position and again enables locking or even effects when no adjusting force in the direction of the actuating or release position is exerted more on the actuating element.

For a height adjustment of the headrest body of the headrest support integrated in a variant of an example bush-shaped guide for at least one rigidly connected to the headrest body support rod, which is guided in or on this guide slidably. About the actuator itself or a component cooperating therewith the adjusting device, the at least one support rod can be positively locked to the associated guide, so that upon actuation of the actuator and concomitant adjustment in the direction of actuation achieved this lock and the headrest body relative to the headrest support is adjustable.

For example, the actuating element engages via a locking section provided thereon, e.g. in the form of a latch, in a notch or latching opening on the rigidly connected to the headrest body holding rod. By adjusting the actuator then this locking portion is to be brought out of engagement with the support rod and an adjustment of the headrest body relative to the headrest support allowed. In particular, the solution according to the invention provides a vehicle seat with an improved head restraint assembly comprising an adjustment device for adjusting a head restraint body having at least a first lever member and a second lever member pivotally mounted about different axes on a lean carrier and pivoting about the various Axles are displaced relative to each other.

The attached figures exemplify possible embodiments of the invention. Hereby show: Page 13

1 shows a detail of a vehicle seat with a first

Embodiment of an inventive

Headrest assembly; Figures 2A - 2C in a sectional side view and in various

Longitudinal positions of a headrest body an adjusting device of the headrest assembly according to the first embodiment;

Figures 3A - 3C in matching with Figures 2A to 2C views the

Head restraint assembly having a headrest body at different distances from a recliner support of the adjustment device;

Figures 4A - 4C in a sectional side view of a development of

Headrest assembly according to the first embodiment with the lowered headrest body in different longitudinal positions;

FIGS. 5A-5C in views corresponding to FIGS. 4A to 4C show the further developed headrest arrangement with the headrest body in different longitudinal positions in a position raised with respect to FIGS. 4A to 4C;

Figures 6A-6C in with Figures 4A to 4C and 5A to 5C matching

Views the trained headrest assembly with the

Headrest body in different longitudinal positions with the headrest body maximally raised;

Figure 7 is a perspective view of the adjusting device of the further formed head restraint assembly including any

Connecting elements for fixing to a frame construction of the backrest;

FIGS. 8A-8C show different perspective views of the adjusting device without the connecting elements of FIG. 7; Page 14

Figure 9 is a cross-section of the further formed headrest assembly of

FIGS. 4A to 8C;

Figures 10A-10C taken along a section lines B-B of Figure 9 obtained lateral

Sectional views of the headrest assembly in different

Longitudinal positions of the headrest body;

Figures 1A-1C show the headrest assembly of Figures 4A to 10C in perspective and partially in section with the headrest body in different longitudinal positions;

Figures 12A-12C in with the views of Figures 1 1A to 1 1 C matching

Views the developed head restraint assembly with the headrest body at different distances to the lean carrier;

Figures 13A - 13C in matching with the sectional view of Figure 9

FIG. 12 shows the headrest assembly with the headrest body in the different positions of FIGS. 12A to 12C;

FIG. 14 shows a perspective view and a detail of a backrest of a vehicle seat with the carrier of the adjustment device fixed thereto; Figure 15 is an exploded view of the further formed

Head restraint assembly according to Figures 4A to 14;

FIGS. 16-23 perspective detailed views of individual components of the

Adjusting device of the further formed headrest assembly of Figure 15;

Figures 24A-24B in sectional view and schematically another

Embodiment of an inventive

Headrest assembly comprising two interlockable lever members for adjustment of a headrest body; Page 15

Figure 25 is a perspective and fragmentary view of a

Vehicle seat with a headrest assembly according to the further embodiment according to Figures 24A and 24B Figure 26 is a front view of Figure 25 with only schematic

Represent a backrest of the vehicle seat;

Figure 26A is a sectional view of the headrest assembly according to the further embodiment obtained along a section lines

A-A of Figure 26;

Figure 27 is a plan view of the headrest assembly of Figures 25 to

26A; Figure 27B is a sectional view of the head restraint assembly taken along a section line B-B of Figure 27.

Figures 1 to 23 illustrate different embodiments of a headrest assembly KA invention based on a first principle of operation of the solution according to the invention, while Figures 24A to 27B illustrate a variant of a headrest assembly KA invention based on a second operating principle of the inventive solution. The object here is in each case a head restraint arrangement KA for a vehicle seat F in a motor vehicle, which integrates an adjusting device 1 for the adjustment of a headrest body K with at least one pair of first and second lever elements 12 and 13 which are used to adjust the headrest body K by different (articulated) Axles G1 and G2 are pivotally mounted to a lean in the intended mounted state support 1 1 and during pivoting about the various axes G1 and G2 are relatively displaced. The adjusting device 1 hereby integrates in each case a 4-joint kinematics to allow an adjustment of the headrest body K in the manner of a parallelogram, so that the headrest body K while maintaining its spatial position relative to the lean carrier 1 1 on a backrest R of a vehicle seat F forward or backward can be adjusted in its longitudinal position.

For the first operating principle is an adjusting device 1 for a power-operated adjustment of the headrest body K and for the second Page 16

Working principle is an adjusting device 1 for a manual adjustment of the headrest K exemplified. However, this definition is by no means mandatory. Thus, with the first operating principle, of course, a head restraint assembly K for a manually adjustable head restraint body K and, using the second operating principle, an adjusting device 1 for a headrest body K which can be adjusted by external force can also be implemented. Incidentally, an adjustment of the longitudinal position of the headrest body K is also possible in particular for each of the functional principles - in deviation from the purely translational adjustment of the headrest body K towards the front and the rear in detail - in which the first and second lever elements pivot 12, 13 also always the inclination of the headrest body K with respect to the backrest R changed, so the headrest body K is inclined at an adjustment to the front and more forward toward the backrest R of the vehicle seat F, respectively, vice versa in an adjustment to the rear and more towards the rear is inclined.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a perspective view and a detail of a vehicle seat F on whose backrest R a headrest arrangement KA constructed according to the first functional principle is mounted as intended. The headrest assembly KA superimposed above the backrest R a headrest body K, so that its distance to a backrest top of the backrest R and in particular a backrest support 1 1 is also adjustable as a longitudinal position of the headrest body K forward (+ x - direction) or backwards (- x direction). Consequently, a head restraint box formed by the head restraint body K can be adjusted in its height and its longitudinal position with respect to an occiput of a seat occupant of the vehicle seat F via the illustrated headrest arrangement KA.

As visible to the outside connection between the backrest R and the headrest body K of the headrest assembly KA is presently a single connecting bar visible, which is formed by a front, second lever member 13 of the adjusting device 1. This lever member 13 is pivotally mounted on the backrest support 11 via a bearing portion 130 to adjust the headrest body K forward or backward. At the same time the complete adjustment mechanism of the adjusting device for adjusting the headrest body 1 is housed within this lever member 13 and within the headrest body K, which on the one hand additional space within the backrest R is available, which is usually in practice for the accommodation of Page 17

Components of the adjustment mechanism is used. In addition, the connection of the headrest body K to the backrest R is implemented particularly aesthetically. It is also achieved by means of the adjusting device 1 explained in more detail below that with a pivoting movement of the elongated lever element 13 (and a lever element 12 which cooperates therewith and is displaceable relative thereto), the headrest body K is only rectilinear and perpendicular to a (hinge) axis G1 of the lever element 13 is adjusted.

As illustrated in greater detail with reference to FIGS. 2A to 2C and 3A to 3C, the adjusting device 1 comprises a further, likewise pivotally mounted rear, first lever element 12 in addition to the lever element 13 designed as a connecting bar. Axle G2, about which the first lever member 12 is pivotally mounted on the carrier 1 1, in this case is offset to the axis G1 of the second lever member 13 in -x - direction.

The first lever member 12 is articulated via a bearing arms 121 b on the carrier 1 1. The bearing arm 121b extends away from a base body 120 of the first lever member 12, which is received within a tubular, bushing or sleeve-shaped guide portion 131 of the second lever member 13 respectively a cavity defined thereby. In this guide portion 131 of the second lever member 13 also protrudes a main body 160 of a pivot lever 16. This pivot lever 16 is pivotally mounted about a bearing arm 161 b at one above the support 1 1 held headrest support in the form of a headrest support plate 14 about a (pivot) axis G4 , At this headrest support plate 14 of the headrest body K is fixed. This is also the second lever member 13 hinged, so that a further (hinge) axis G3 is defined for a hinge connection between the headrest support plate 14 and the second lever member 13. The second lever element 13 is arranged with an upwardly open end in an opening 140 of the headrest support plate 14, so that the open-top end of the second lever member 13 is present within the headrest body K. From this open end of the base body 160 of the pivot lever 16 projects and L-shaped extends over its bearing arm 161 b to its pivot axis G4 on the headrest support plate 14. The pivot lever 16 is on the one hand relative to the second lever member 13 along the longitudinal axis thereof displaceable when the second lever member 13 is pivoted about its axis G1 to the lean carrier 1 1 (see Figures 2A to 2C), and on the other hand relative to the first lever member 12 slidably when a Page 18

Height of the headrest body K with respect to the backrest R to be set (see Figures 3A to 13).

About the adjusting device 1 with the first and second lever elements 12 and 13 and the pivot lever 16, a lever assembly for a 4-joint kinematics is provided on the headrest body K on the one hand relative to the backrest R translationally substantially along a horizontal and beyond in its height along a vertical by pivoting the individual levers 12, 13 and 16 and / or a relative displacement of individual levers 12, 13, 16 is adjustable to each other.

In the adjusting device 1 of Figures 2A to 3C is for the displacement of the headrest body K forward and rearward displacement of the first and second lever members 12, 13 relative to each other in pivotal movements of the lever members 12 and 13 about the two (joint) axes G1 and G2 implemented on the carrier 1 1. For this purpose, the main body 120 of the rear, first lever member 12, which is received in the front, second lever member 13, displaced longitudinally, for example, power-operated by means of a rack or a spindle gear. This relative movement between the first and second lever elements 12 and 13 generates a rotational movement of the front, second lever member 13 about its axis G1 on the support 1 1 (in pivoting directions + S or -S), whereby the headrest support plate 14 - depending on the direction of displacement of the two lever elements 12 and 13 relative to each other - forwards in + x - direction or rear -x - direction is taken. About the hinge connection of the second lever member 13 on the headrest support plate 14 and the additional pivot lever 16, which is also hinged to the headrest support plate 14 and coupled to the first lever members 12, the headrest support plate 14 remains unchanged in this respect to their position relative to the backrest support 1 1 and is only translationally adjusted. For a height adjustment along a spatial axis Z in + z - upward or - z - downward direction, the current relative position of the first and second lever elements 12 and 13 remains unchanged relative to each other and only the pivot lever 16 is with its base 16 relative to the two first and second lever elements 12 and 13 along the longitudinal axis of the front, second lever member 13 is displaced, whereby the coupled with the pivot lever 16 headrest support plate 14 is adjusted with. The longitudinal adjustment of the pivot lever 16 is independent of a pivoting movement of the second lever member 13 in Page 19

Pivoting directions + S to the front or -S to the rear and in particular also independent of a pivotal position of the second lever member 13. Accordingly, a longitudinal position of the headrest body K in each height of the headrest body K and independently thereof can be varied.

A development of the embodiment of FIGS. 2A to 3C is illustrated with reference to FIGS. 4A to 3C, in which a parallelogram guide for the headrest body K of the headrest arrangement KA is formed by a lever arrangement with two first and second lever elements 12 and 13 and two pivot levers 15 and 16. The headrest body K is immovably fixed in this variant on a rigidly connected to the headrest support plate 14 retaining plate 17 relative to the headrest support plate 14. A displacement of the headrest body K also takes place here by displacement of the headrest support plate 14 by means of a pivoting of the first and second lever elements 12 and 13 and a longitudinal displacement of the pivot lever 16.

The first and second lever elements 12 and 13 are in this case analogous to the embodiment of Figures 2A to 3C pivotally mounted on a support fixed to the backrest 1 1 about axes G1 and G2 and displaceable relative to each other. The two pivoting levers 15 and 16 are pivotally mounted on a headrest support plate 14 positioned above the backrest-fixed support 11 about (pivoting) axes G3 and G4 and in each case partially (in the case of the pivoting lever 16) respectively completely (in the case of the pivoting lever 15) in one Headrest box of the headrest body K housed. The first and second lever members 12 and 13 are mechanically coupled to the two pivot levers 15 and 16 such that the two pivot levers 15, 16 are driven to pivot about their axes G3 and G4 on the headrest support plate 14 when the first and second lever members 12 and 13 pivoted about their axes G1 and G2 on the lean carrier 1 1 and relocated relative to each other. Here, a pivoting movement of the first and second lever members 12, 13 is also converted into a purely translational adjustment of the headrest support plate 14 and the headrest body K arranged thereon along a horizontal, as will be explained in more detail below.

The lean in the assembled state support 1 1, as is illustrated in more detail, for example in Figures 7 to 8C and 14, plate-shaped and connected as a separate component with the frame structure of the backrest R. In this case, the carrier 1 1 with the adjusting device 1 for the headrest body K on the backrest Page 20

To be able to fix R, connecting elements 10a and 10b are provided. The connecting elements 10a and 10b form for this purpose longitudinally extending connecting webs 100a and 100b, which can be plugged into bush-shaped headrest bearings Ra, Rb on the frame structure of the backrest R. Such a connection of a headrest assembly KA according to the invention is e.g. on conventional backrests R possible. Incidentally, the connecting elements 10a and 10b are laterally fixed to the carrier 11 by way of bearing bolts L1 to L4, which at the same time provide the articulated connection of the first and second lever elements 12 and 13 with the carrier 11.

The subsequently to be attached to the backrest R and in this embodiment to be fixed carrier 1 1 forms a bearing opening 1 10, in which a bearing portion 130 of the front, second lever member 13 is pivotally received. For the pivotable mounting of the sleeve-shaped here and acting as a connecting spar to the headrest body K second lever element 13 bearing journals are formed on the bearing portion 130 laterally. For example, in FIG. 17, a speaking bearing journal 130b can be seen, in which one of the bearing bolts L1 to L4 engages in order to support the second lever element 13 pivotably about a (hinge) axis G1 on the carrier 11.

Within a sleeve-shaped guide section 131 of the second lever element 13, a base body 120 of the first, rear lever element 12 is accommodated. This main body 120 is present in cross-section C-shaped and integrally formed with an angled bearing portion, are formed on the bearing arms 121 a and 121 b for the pivotal mounting of the first lever member 12 on the support 1 1. The bearing arms 121 a and 121 b are formed like tabs and have a through hole for a bearing sleeve Ha or Hb. In a sheave Ha or Hb engages in the mounted state of the head restraint assembly KA each one of the bearing pin L1 to L4 and thereby supports the first lever member 12 about its (joint) axis G2 on the support 1 1 (see for example Figures 8B, 8C and 16).

On the two lever elements 12 and 13, components of a head restraint drive 2 are arranged within a cavity defined by the second lever member 13, via which a power-operated adjustment of the head restraint body K is controlled relative to the backrest support 1 1 and by means of the pivot lever 15 and 16 with the lever elements 12 and 13 are mechanically coupled. The headrest drive 2 includes, among other things, a drive housing 20 with a lid Page 21

21, which is fixed within the second lever member 13 on the main body 120 of the first lever member 12, e.g. via separate fasteners, such as screws or bolts. In the drive housing 20 electromotive drive units 3.1 and 3.2 are arranged, which cooperate with a respective spindle gear. Each spindle gear in this case has a drive spindle 4.1 or 4.2 and a with the respective drive spindle 4.1 or 4.2 meshing spindle nut 5.1 or 5.2. A first spindle nut 5.1, which meshes with a first drive spindle 4.1, is fixed to the (second) pivoting lever 16 in the present case. The other, second spindle nut 5.2, which meshes with the other, second drive spindle 4.2, is fixed to the second lever element 13. For this purpose, a connecting pin 8 extending transversely to the longitudinal axis of the second drive spindle 4.2 is guided by the second spindle nut 5.2 and fixed to the second lever element 13. This connecting pin 8 extends through a through hole 560 in a mounting portion 56 of the second spindle nut 5.2 and is simultaneously positively received on opposite side walls of the second lever member 13 (see in particular Figures 7.8 A to 8C and 22). Via a rotatably connected to the second drive spindle 4.2 output shaft 6 is also the (second) spindle gear with the second drive spindle 4.2 and the lever element fixed second spindle nut 5.2 coupled to the other, first pivot lever 15. This is illustrated in more detail in particular in conjunction with FIGS. 9, 10A to 10C, 1 1A to 11C, 12A to 12C and 13A to 13C.

About the (first) spindle gear with the schwenkhebelfesten first spindle nut 5.1 of the second lever member 13 displaceable second pivot lever 16 in its position relative to the second lever member 13 is adjustable. By rotation of the first drive spindle 4.1 as a result of the fixation of the first spindle nut 5.1 on the second pivot lever 16 of the pivot lever 16 along the spindle axis of the first drive spindle 4.1 adjusted and recorded in the second lever member 13 base 160 of the second pivot lever 16 further into the second lever member thirteenth into or out of this. In this longitudinal adjustment of the second pivot lever 16 takes the headrest support plate 14, to which the second pivot lever 16 is articulated. As is illustrated in particular with reference to FIGS. 7, 8A to 8C, 13A to 13C and 18, the base body 160 of the second pivoting lever 16 is likewise sleeve-shaped and accordingly hollow, so that the components of FIGS Page 22

Spindle gear can be incorporated herein. The bearing on the headrest support plate 14 about a pivot axis G4 physically defined bearing axis 9.2 via two laterally on the base body 160 down (in -z - direction) protruding and to the rear (in -x - direction) angled running bearing arms 161 a and 161 b.

At an upper end of the pivot lever 16, a recess 162 is provided in which a fixing portion 56 of the first spindle nut 5.1 is inserted positively. In this recess 162, the first spindle nut 5.1 is held in a form-fitting manner and fixed on the second pivoting lever 16 via a locking pin 7 extending transversely to the longitudinal axis of the first drive spindle 4.1. This locking pin 7 extends through a through hole in the second pivot lever 16 and is also guided through a through hole 560 in the mounting portion 56 of the first spindle nut 5.1 so that the first spindle nut 5.1 secured thereto in position on the recess 162 and relative to the second Swivel lever 16 is not displaced. Details of the first spindle nut 5.1 are here also apparent from the enlarged individual representation of the spindle nut 5.1 of FIG. 21. In particular, from this detailed representation is also a through hole 54 with a defined by a threaded sleeve 540 internal thread can be seen. The first drive spindle 5.1 meshes with this internal thread in order to displace the first spindle nut 5.1 together with the second pivot lever 16 relative to the first and second lever elements 12 and 13 upon rotation of the first drive spindle 5.1 and to set a height of the headrest body K. In order to avoid a collision of the base body 160 of the second pivot lever 16 with the transverse to the adjustment direction connecting pin 8 at a corresponding driven by the first drive unit 3.1 displacement of the second pivot lever 16 along the first and second lever members 12 and 13, by means of which the second spindle nut 5.2 is fixed to the second lever member 13, the base body 160 of the second pivot lever 16 on two opposite side walls each have a slot-shaped longitudinal opening 1600, 1601 on. Through this longitudinal opening 1600 and 1601, a front and rear end of the connecting pin 8 is guided, so that the main body 160 of the second pivot lever 16 along the longitudinal openings 1600 and 1601 along relative to the connecting pin 8 can be moved. Page 23

Laterally next to the recess 162 for the positive fixing of the first spindle nut 5.2, the second pivot lever 16 has a bearing opening 163 for the output shaft 6, which is rotatably connected to the second drive spindle 5.2. Via the second, arranged on the first lever member 12, rotatable drive spindle 4.2 is in conjunction with the second lever element 13 fixed second spindle nut 5.2, with the second drive spindle 4.2 meshes, a relative displacement of the two lever members 12 and 13 generated to each other, in Pivoting movements of the two lever members 12 and 13 are converted to their axes G1 and G2 on the lean carrier 11. Thus, upon rotation of the second drive spindle 4.2, it is rotated out of the spindle nut 5.2 fixed to the second lever element 13 or rotated out of it. Due to the pivotable mounting of the two lever elements 12 and 13 and the restriction of the degrees of freedom on the respective (joint) axes G1 and G2 forces such a relative displacement of the two lever members 12 and 13 relative to each other along a - defined here by the second drive spindle 4.2 - longitudinal axis the lever elements 12 and 13 each have a pivoting movement about their respective axes G1 and G2 on the lean carrier 1 1 in a pivoting direction + S forward or -S backwards - depending on the direction of rotation of the second drive spindle 4.2. In order not to block a relative displacement of the first and second lever elements 12 and 13 by the connecting pin 8 extending transversely through the cavity of the second lever element 13, the first lever element 12 also has a slot-shaped longitudinal opening 1200 at its base body 120 accommodated in the second lever element 13 on.

In order to take along the headrest body K during the pivoting movements of the first and second lever elements 12 and 13, the second spindle mechanism also acts on the first pivot lever 15 and thereby couples the two pivot levers 15 and 16 to the headrest support plate 14 with the first and second lever elements 12 and 13. The second drive spindle 4.2 extends for this purpose through a through hole 54 of the second spindle nut 5.2 therethrough. In this through hole 54, a threaded sleeve 540 is provided for defining a meshing with the second drive spindle 4.2 internal thread according to the figure 22. With a protruding from the through hole 54 of the second spindle nut 5.2 form-fitting region in the form of a hexagonal shaft portion 42 controls the second drive spindle 4.2 at a rotation beyond but also a relative displacement of the two pivot levers 15 and 16. The hexagonal shaft section 4.2 is rotationally fixed, but axially displaceable with a Form-fitting portion 62 of the output shaft 6 is connected by the hexagonal shaft portion 42 in a bore of the Page 24

Output shaft 6 is inserted with a corresponding cross-section. The second drive spindle 4.2 thus has, in contrast to the first drive spindle 4.1, not only an external thread 40 meshing with the respective spindle nut 5.1 or 5.2 and a drive element meshing with a motor shaft of the respective drive unit 3.1 or 3.2 in the form of a drive worm 41, but additionally also a drive worm 41 Positive locking portion 42 for the rotationally fixed, but axially displaceable connection with the output shaft. 6

In the bearing opening 163 of the second pivot lever 16, the output shaft 6 is axially at its locking portion 61 via the locking pin 7 in the bearing opening 163 of the second pivoting lever 16 stored in the manner of a constriction secured. Consequently, the output shaft 6 can not be displaced along a longitudinal axis of the output shaft 6 or a longitudinal axis of the second drive spindle 4.2 relative to the second pivot lever 16. For a longitudinal displacement of the second pivot lever 16 relative to the first and second lever elements 12 and 13, however, the output shaft 16 is axially displaceable along the second drive spindle 4.2 along the hexagonal shaft section 42. The output shaft 6 also protrudes with a shaft portion having an external thread 60 from the bearing opening 163 of the second pivot lever 16. About this shaft portion, the rotatable output shaft 6 is coupled to the first pivot lever 15 by the protruding shaft portion with the external thread 60 meshes with a spindle nut 152 at the upper end of the lever 151 of the first pivot lever 15. Thus, above the bearing opening 163 of the second pivoting lever 16 extends a functioning as coupling upper end 151 of the first, rear pivot lever 15. This upper end of the lever 151 is spaced from a bearing portion 150 of the first pivot lever 15, via which the first pivot lever 15 by means of laterally projecting journals 150a of the bearing portion 150 is pivotally mounted on the headrest support plate 14. About the laterally projecting bearing pin 150 a of the first pivot lever 15 is pivotally held on two opposing lever bearings 141 a and 141 b of the headrest support plate 14, in each case a bearing pin 9.1 a or 9.1 b engages in an associated bearing pin 150 a of the pivot lever 15. The lever bearings 141 a and 141 b are formed according to the figure 23 to a bearing frame 141 of the headrest support plate 14, which bounds the opening 140 through which the upper end of the Page 25

Guide portion 131 of the second lever member 13 and the base 160 of the second pivot lever 16 extends.

The cooperating with the output shaft 6 coupling portion 151 of the first pivot lever 15 is connected to the bearing portion 150 via a central portion 153 and engages over the second pivot lever 16 within the headrest body K. Thus, the pivot axis G3 of the first pivot lever 15, the headrest support plate 14 to the pivot axis G4 of the second pivot lever 16 is spaced, crossing the adjustment axis, along which the second pivot lever 16 is longitudinally displaceable. A relative movement between the two pivoting levers 15 and 16 can thus be generated by way of the output shaft 6 and a spindle nut 152 which engages in the coupling section 151, in which the main body 160 of the second pivot lever 16 in a central opening in the bearing section 150 of the first pivot lever 15 and is displaced within the guide portion 131 of the second lever member 13. As a result, pivot the two pivoting levers 15 and 16 (in identical pivoting directions in or against the clockwise direction) about its pivot axis G3 and G4 on the headrest support plate 14 and thus keep the headrest support plate 14 in unaltered alignment with the lean carrier 11, when the two lever members 12 and 13th displaced relative to each other and pivoted about their (joint) axes G1 and G2.

As illustrated with reference to FIGS. 4A to 4C, FIGS. 5A to 5C, FIGS. 6A to 6C, 9, 10A to 10C, FIGS. 1A to 1C, FIGS. 12A to 12C and FIGS. 13A to 13C in detail with reference to different adjustment positions of the headrest body K, the adjusting device is 1 arranged to move the headrest body K (a) forward or backward with respect to a seat longitudinal axis, the headrest body K being adjusted only horizontally, and (b) adjusted in height to the backrest R. About the second spindle gear with the second drive spindle 4.2, the spindle nut 5.2 and the spindle nut 152 of the first pivot lever 15 meshing and rotatably connected to the second drive spindle 4.2 and axially displaceably connected drive shaft 6 are the two pivotally mounted on the backrest support 1 1 lever elements 12th and 13 displaceable relative to each other as well as the two pivotally mounted on the headrest support plate 14 pivot lever 15 and 16 within the headrest body K, whereby pivotal movements of the first and second lever members 12 and 13 can be effected on the reclining support 1 1 to the headrest body K while maintaining its spatial position to the lean carrier 1 1 only to translate along a horizontal translational. For an adjustment of the Page 26

Headrest support plate 14 along with the headrest body K on the guide portion 131 of the second lever member 13 acts on the first drive spindle 4.1 driven by the drive unit 3.1 with a first spindle nut 5.1 fixed to the second pivot lever 16.

In order to avoid a collision of the top of the first spindle nut 5.1 projecting drive spindle 4.1 in a maximum lowered position of the headrest body K with the second pivot lever 16 cross first pivot lever 15, the first pivot lever 15 at its the second pivot lever 16 cross-upper end 151 a Through opening 154. In or through this passage opening 154, the first drive spindle 4.1 can protrude with its free end, in particular in a maximally lowered position of the headrest body K.

In deviation from the illustrated embodiment, it is of course not mandatory that the head restraint assembly KA is fixed on the carrier 1 1 on an upper cross member of the frame structure of the backrest R. Likewise, for example, a fixation on a side support, for example in the form of a side member, the backrest R possible. Also, the carrier 11 supporting the lever elements 12, 13 may already be integrated into the frame construction of the backrest R and / or be welded to the frame construction. Even with such a variant, the illustrated embodiment of a headrest assembly KA invention provides the advantage that the entire adjustment device 1 with the lever mechanism for adjusting the headrest body K on the one hand in the formed by the second lever member 13 connecting member between lean carrier 1 1 and the headrest body K and inside of the headrest box defined by the headrest body K can be accommodated. Space in the upper region of the backrest R is not required for this purpose.

Regardless of the connection to the backrest R is with the inventive solution a purely translational adjustment of the headrest body K and thus a contact surface of the headrest body K, on which a seat user with his back of the head rest body K rests reached, without requiring a part of the headrest body K itself would have to be designed to be displaced and thus without a head box would have to increase during a corresponding adjustment, as is the rule in practice usual headrests. Page 27

The embodiment variant of FIGS. 24A to 27B likewise makes use of a parallelogram guide of the headrest body K, in which first and second lever elements 12 and 13 are not only pivotable about different (joint) axes G1 and G2 on a support 1 1 which is lean in the mounted state , but also relative to each other are displaced. A difference from the variant described above is in particular the mounting of the headrest support plate 14 via two pairs of levers 123a and 123b, each with first and second lever members 12 and 13. Here is consequently not only the outside a second lever member 13 as a connection between the backrest R and the headrest body K. visible, noticeable. Rather, two spaced-apart pairs of levers 123a and 123b for the storage and adjustment of the head restraint body K above the backrest R are provided, which are each hinged to its own lean carrier 1 1 a or 1 1 b.

Here, as schematically illustrated in FIGS. 24A and 24B, the first and second lever elements 12 and 13 are articulated with different degrees of freedom on the one hand to the backrest-fixed support 11a or 11b and to a headrest support in the form of a headrest support plate 14. While one (first, rear) lever element 12 is held here exclusively pivotable about the respective joint axes G2 and G4, the other (front, second) lever element 13 has an additional degree of freedom on its (joint / pivot) axes G1 and G3 on and is about lever bearings 12.2 and 12.4, each with a bearing opening L01 or L03 and relative to the carrier 1 1 a, 1 1 b respectively of the headrest support plate 14 slidably. Thus, the two lever members 12 and 13 of each pair of levers 123a, 123b in a pivoting movement about their joint axes G1 and G2 on the lean carrier 1 1 a or 1 1 b also move relative to each other longitudinally and thus move the headrest support plate 14 only horizontally when the two lever members 12 and 13 are pivoted.

In order to secure the first and second lever elements 12 and 13 in each case against pivoting and thus to lock an adjustment position of the headrest body, the first and second lever elements 12 and 13 are each rigidly locked together. For this purpose, a locking element 321 between the respective lean carrier 1 1 a or 1 1 b and the headrest support plate 14 is provided. If this, displaced for example on the rear lever elements 12 displaceably mounted locking element and brought out of engagement with the second lever member 13, a relative displacement of the two lever members 12 and 13 is allowed relative to each other and the headrest body K can by pivoting the Page 28 first and second lever members 12 and 13 are moved forward or backward. By the joint axes G1 to G4 are each further apart in pairs than the along the Z-axis therebetween abutting portions of the first and second lever members 12 and 13, the adjustment mechanism can be compactly housed in two bush-shaped housings, extending between the headrest support plate 14 and the lean carrier 1 1 a or 1 1 b extends.

In the embodiment variant illustrated in more detail with reference to FIGS. 25 to 27B, a manual head restraint adjustment is furthermore provided, in which two locking elements 321 on the two pairs of levers 123a and 123b can be released synchronously by pressing an actuating element BE on the head restraint body K, in order subsequently to effect manual adjustment of the Headrest body K under pivoting the first and second lever members 12 and 13 of the two pairs of levers 123a and 123b and each allow relative displacement of the first and second lever members 12 and 13. Here, too, it is ensured via the lever mechanism of the adjusting device 1 that only a horizontal adjustment of the headrest body K with the headrest support plate 14 is always permitted in the front or rear direction in the + x direction or - x direction. The actuating element BE displaceably mounted on the headrest support plate 14 parallel to the (articulated / pivoting) axes G1 to G4 acts via two actuation ramps BR on two unlocking elements EE, which are each arranged on a pair of levers 123a, 123b. By pressing the actuating element BE the unlocking elements E are longitudinally displaced on a respective rear lever element 12, in this case substantially perpendicular to an actuating direction of the actuating element BE and thus in the direction of the respective carrier 1 1 a or 1 1 b. As a result of this adjusting movement, each unlocking element EE acts on an associated locking element 321 and displaces it in the direction of a fixed ramp section RA (compare in particular FIG. 26A). At this ramp section RA slides a respective locking element 321 and is displaced transversely to the adjustment of the respective unlocking EE.

Here, provided on the locking element 321 locking pins with locking holes 132 are disengaged, which are provided on the other, second lever member 13. As long as these locking pins (in the present case at least two per locking elements 321) engage in the locking openings 132, the first and second lever elements 12 and 13 are rigidly fixed to one another. Will this Page 29

Locking achieved by means of the actuating element BE, a relative displacement of the two lever members 12 and 13 of each pair of levers 123a and 123b is possible as well as a pivoting of the two lever members 12 and 13. For a longitudinal guide of the two lever members 12 and 13 of a pair of levers 123a or 123b to each other are on the lever elements 12 and 13 mutually longitudinally guided connecting elements 18.1 to 18.4 provided. Here, each lever member 12 or 13 on the one hand a longitudinal opening or a slot in which a pin or pin as a connecting element 18.1 to 18.4 slidably engages, and on the other hand, such a connecting element 18.1 to 18.4, in a longitudinal opening or a slot of the other lever member 13 or 12 slidably engages.

A headrest body 12 of the embodiment of FIGS. 24A to 27B is also height-adjustable along the Z-axis in the + z-direction and -z-direction. For this purpose, the headrest support plate 14 forms 2 locking sleeves 14.1 and 14.2, in which with the headrest body K firmly connected support rods HS1 and HS2 are held displaceably. The support rods HS1 and HS2 are in accordance with intent mounted headrest body K completely within the same and are therefore not visible from the outside. For locking in a desired vertical position, each holding rod HS1, HS2 on a plurality of indentations or latching openings KE, in which a locking portion VA of the actuating element BE, for example in the form of a latch, can engage positively to the headrest body K relative to the headrest support plate 14 to lock the locking bushes 14.1 and 14.2 in one of several possible adjustment position.

The actuating element BE fulfills a double function in this context. In the illustrated in the figures neutral position of the actuating element BE this is adjustable along the headrest support plate 14 in an actuation or release position to release both a lock of the two pairs of levers 123a and 123b as well as a locking of the support rods HS1 and HS2 to the locking sleeves 14.1 and 14.2 , Upon actuation of the actuating element BE, both an adjustment of the headrest body K in the longitudinal direction horizontally to the front or rear and a vertical adjustment is then allowed vertically up and down. For the sake of easier assembly, the headrest body K in the present case is otherwise made in two parts. At a first headrest part KT, the support rods HS1 and HS2 are fixed. After proper connection with the headrest support plate 14th Page 30 and the adjusting device 1, the headrest box is closed by a second (not shown here) headrest part, which is determined via a latching mechanism R on the headrest part KT. Although the adjusting device 1 is arranged in a head restraint assembly KA of Figures 24A to 27B for manual adjustment, of course, while maintaining the illustrated design principle and in particular the arrangement of the two lever members 12 and 13 of the two pairs of levers 123a and 123b, a power-operated adjustment implemented For example, by means of at least one electric motor driven spindle gear.

Page 31

LIST OF REFERENCE NUMBERS

1 adjustment device

100a, 100b connecting bridge

10a, 10b connecting element

1 1, 1 1 a, 1 1 b carrier

1 10 bearing opening

12 (rear, first) lever element

12.2, 12.4 Lever bearings

120 basic body

1200 longitudinal opening

121 a, 121 b bearing arm

123a, 123b lever pair

13 (front, second) lever element

130 bearing section

130b bearing journal

131 leadership section

132 locking opening

14 headrest support plate (headrest support)

14.1, 14.2 locking bush

140 opening

141 bearing arm

141 a, 141 b Lever bearing

15 (rear) pivot lever

150 storage section

150a bearing journal

151 Upper Lever End / Coupling Section 52 Spindle Nut

153 middle section

154 passage opening

16 (front) pivot lever

160 basic body

1600, 1601 longitudinal opening

161 a, 161 b bearing arm

162 recess

163 bearing opening

17 retaining plate

18.1 - 18.4 Connecting element Page 32 Headrest drive

0 drive housing

1 lid

3.1, 3.2 drive unit

321 locking element

4.1, 4.2 Drive spindle

40 external thread

41 drive worm (drive element)

42 Hexagonal shaft section (positive locking area) 5.1, 5.2 Spindle nut

54 Through hole

540 threaded sleeve

56 attachment section

560 through hole

6 output shaft

60 external thread

61 locking area

62 positive-locking area

7 locking pin

8 connecting pin

9.1 a, 91. b Bearing pin

9.2 bearing axis

BE actuator

BR actuation ramp

EE unlocking element

F vehicle seat

G1, G2, G3, G4 (articulated / swivel) axis

Ha, Hb bearing sleeve

HS1. HS2 handrail

K headrest body

KA headrest arrangement

KE notch / notch opening

KT headrest part

L1, L3, L4 bearing pin

L01. L03 bearing opening

R backrest

RA ramp section Page 33

Ra, Rb headrest bearings

RM locking mechanism

+ S, -S swing direction

VA locking section

Claims

Page 34 claims

A head restraint assembly for a vehicle seat, comprising an adjustment device (1) for adjusting a head restraint body (K) positionable above a seat back (R) of the vehicle seat of a headrest of the vehicle seat, characterized in that the adjustment device (1) comprises at least a first lever element (12 ) and a second one

Lever element (13) pivotally mounted for adjustment of the headrest body (K) about different axes (G1, G2) on a backrest (R) to be assigned carrier (1 1) and during pivoting about the various axes (G1, G2) are displaced relative to each other.

2. head restraint assembly according to claim 1, characterized in that the adjusting device (1) for the adjustment of the headrest body (K)

(A) a displacement of the first and second lever elements (12, 13) relative to each other in pivotal movements of the lever elements (12, 13) converts or (b) pivotal movements of the first and second lever elements (12, 13) permits, resulting in a displacement of the first and second lever elements (12, 13) relative to each other.

3. headrest assembly according to claim 1 or 2, characterized in that on the adjusting device (1) with its first and second lever elements (12, 13) a parallelogram for the adjustable headrest body (K) is provided.

4. Headrest arrangement according to one of claims 1 to 3, characterized in that at least one of the first and second lever elements (12,

13) is articulated to a headrest support (14) on which the headrest body (K) is arranged.

5. Headrest arrangement according to one of the preceding claims, characterized in that by means of the adjusting device (1) of the headrest body (K) on the vehicle seat - based on a seat longitudinal axis - is adjustable forward or backward and - based on a distance to an upper end of Page 35

Backrest (R) of the vehicle seat - is height adjustable when the head restraint assembly (KA) is intended mounted on the vehicle seat.

6. head restraint assembly according to one of the preceding claims, characterized in that the first and second pivotally mounted respectively on the carrier

(1 1) mounted lever elements (12, 13) abut each other and / or one of the lever elements (12, 13) is at least partially received in a cavity of the other lever element (13).

7. Headrest arrangement according to one of the preceding claims, characterized in that the headrest assembly (KA) for manual adjustment of the headrest body (K) is provided or the headrest assembly (KA) has a headrest drive (2) for power-operated adjustment of the headrest body (K).

8. headrest assembly according to claim 7, characterized in that on the headrest drive (2) the first and second lever elements (12, 13) are externally operated actuated relative to each other to pivot the lever members (12, 13) and thereby the headrest body (K) on the vehicle seat - relative to a longitudinal axis of the seat - to be adjusted forwards or backwards, if the

Headrest assembly (KA) is intended to be mounted on the vehicle seat ..

9. headrest assembly according to claim 7 or 8, characterized in that the headrest drive (2) comprises at least one spindle gear.

10. head restraint assembly according to claim 9, characterized in that a spindle nut (5.2) of the spindle gear on one of the first and second lever elements (12, 13) is arranged and a hereby meshing drive spindle (4.2) on the other lever element (12) is arranged.

1. Headrest arrangement according to one of the preceding claims, characterized in that one of the first and second lever elements (12, 13) on a headrest support (14) is articulated, on which the headrest body (K) is held and on the two with the first and second lever elements (12, 13) coupled pivoting lever (15, 16) of the adjusting device (1) to different

Axles (G3, G4) are pivotally mounted. Page 36

12. Headrest arrangement according to claim 1 1, characterized by a coupling of the two pivot levers (15, 16) with the first and second lever elements (12, 13) via which the two pivot levers (15, 16) to pivotal movements about their axes (G3, G4) are driven on the headrest support (14) when the first and second lever members (12, 13) are pivoted about their axes (G1, G2) on the support (11) and displaced relative to one another.

13. Headrest assembly according to claim 1 1 or 12, characterized in that by the coupling of the two on the headrest support (14) pivotally mounted pivot lever (15, 16) with the pivotally mounted on the carrier (1 1) mounted first and second lever elements (12 , 13) a pivoting movement of the first and second lever elements (12, 13) in a purely translational adjusting movement of the headrest support (14) and the headrest body (K) arranged thereon can be implemented.

14. Headrest assembly according to claim 9 or 10 and one of claims 1 1 to 13, characterized in that one of the pivot lever (15, 16) for performing a pivoting movement on the headrest support (14) is coupled to a drive spindle (4.2) of the spindle gear , via which a displacement of the first and second lever elements (12, 13) relative to each other and the pivoting of the first and second lever elements (12, 13) about their axes (G1, G2) on the carrier (1 1) is controllable.

15. Headrest arrangement according to one of claims 1 1 to 14, characterized in that one of the pivot levers (15, 16) relative to at least one of the first and second lever elements (12, 13) is displaceable.

16. Headrest arrangement according to claim 15, characterized in that relative to at least one of the first and second lever elements (12, 13) displaceable pivot lever (16) on one of the first and second lever elements (12, 13) displaceably guided and at least partially in one is received by this lever element (13) defined cavity.

17. Headrest arrangement according to claim 15 or 16, characterized in that relative to at least one of the first and second lever elements (12, 13) displaceable pivot lever (16) for adjusting a height of the headrest body (K) together with the headrest support (14) and the other Page 37

Pivot lever (15) relative to the first and second lever elements (12, 13) is adjustable.

18. Headrest arrangement according to claim 17, characterized in that the relative to at least one of the first and second lever elements (12, 13) displaceable

Pivot lever (16) by means of a spindle gear is operated by power-operated adjustable.

19. headrest assembly according to 18, characterized in that a spindle nut (5.1) of the spindle gear on the relative to at least one of the first and second lever members (12, 13) slidable pivot lever (16) may be arranged with one of the first and second Lever elements (12, 13) arranged drive spindle (4.1) of the spindle gear meshes.

20. Headrest arrangement according to one of claims 9 or 10 and one of claims 18 and 19, characterized in that the headrest drive (2) comprises two spindle gears.

21. Headrest arrangement according to one of the preceding claims, characterized in that one of the first and second lever elements (12, 13) extending between the headrest body (K) and the carrier (1 1) extending

Housing defined with a cavity in which between the headrest body (K) and the support (1 1) extending components of the adjustment device (1) are added.

22. Headrest arrangement according to one of claims 1 to 7, characterized in that the first and second lever elements (12, 13) in a relative position to each other are locked together to fix the first and second lever members to each other and secure against pivoting and thus to lock an adjustment position of the headrest body (K), and for an adjustment of the headrest body (K) a locking of the first and second lever elements (12, 13) is releasable, so that the first and second lever elements (12, 13) pivotally and relatively displaceable are.

23. Headrest arrangement according to claim 4 and claim 22, characterized in that both the first and the second lever element (12, 13) are additionally articulated on the headrest support (14), wherein one of the lever elements (12, 13) via a respective hinge connection on the carrier (1 1) and on Side 38 of the headrest support (14) not only pivotable, but also slidably mounted and thus each having an additional degree of freedom to be relative to the other lever member (12) to be displaced.

24. Headrest arrangement according to one of claims 22 to 23, characterized in that the adjusting device (1) comprises two pairs (123a, 123b) each having a first and a second lever element (12, 13).

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