BACKREST DEVICE FOR A PIECE OF SEATING AND / OR LOADING FURNITURE

Description

[0001] The invention relates to a backrest device for a piece of furniture suitable for sitting and / or lying. The invention also relates to a piece of furniture for sitting and / or lying down with such a backrest device and with a seat or lying element.

[0002] Modern seating or reclining furniture sometimes provides adjustment options to increase comfort for the user. These adjustment options affect, for example, the user's head or back. The backrest device according to the invention is particularly aimed at providing a needs-based option for supporting the user's head and back while still offering an attractive appearance.

[0003] A vehicle seat with a backrest and a linearly adjustable headrest is known from US 4,350,389, US 2003 / 0098596 A1, and US 7,458,640 B1. Seating and / or reclining furniture with adjustable headrests are known from US 2019 / 0223606 A1 and DE 2020 106 922 U1.

[0004] The piece of seating and / or reclining furniture (piece of furniture) can, in particular, be an upholstered piece of furniture, such as an armchair, a sofa, a couch, a chaise longue, or a chaise longue. The backrest device accordingly comprises upholstered elements.

[0005] The backrest device according to the invention comprises a backrest and a headrest. The headrest is adjustable relative to the backrest between a first (retracted) position and a second (extended) position. Specifically, this involves the possibility of linear adjustment along a translation axis. The headrest has an overlap section that always overlaps with a part of the backrest, so that there is no gap between the backrest and the headrest when the headrest is in the first position, the second position, and an intermediate position (between the first and second positions). This means that, regardless of its position, the headrest always overlaps with a part of the backrest. Depending on the position of the headrest, the area of ​​overlap along the translation axis is larger or smaller.The smaller the overlap area, the more the headrest extends the backrest along the translation axis. Linear adjustment thus allows the backrest to be adjusted to the user's height. Since there is no gap between the headrest and the backrest in any headrest position, the appearance is harmonious and the modular design is not emphasized.

[0006] According to one embodiment, the overlapping section is flat and extends in a main extension plane. The overlapping section extends across the entire width of the headrest. At least in the viewing direction perpendicular to the main extension plane, the overlapping section always overlaps with a portion of the backrest. The overlapping section can be arranged with respect to the backrest such that the overlapping section conceals a portion of the backrest (as viewed from the side facing a user).

[0007] The translation axis can lie in the main extension plane of the overlapping section of the headrest. Alternatively, the translation axis and the main extension plane can form an angle of less than 90°. In particular, the translation axis can lie in the main extension plane of the overlapping section. If the backrest device is arranged as intended, the translation axis can be oriented vertically.

[0008] According to one embodiment, a plurality of intermediate positions are provided between the first position and the second position along the translation axis, which intermediate positions can be adjusted by linearly adjusting the headrest relative to the backrest along the translation axis. The headrest can be lockable or latchable in each of the first position, the second position, and any intermediate position.

[0009] In addition to linear adjustment, the headrest can be pivoted about a rotational axis. The rotational axis can be essentially perpendicular to the translational axis and extend across the width of the headrest. The pivoting of the headrest allows the inclination of the headrest relative to the backrest to be adjusted. Depending on the position of the headrest along the translational axis, the inclination can be adjusted for the head or for the upper body and the head as a whole.

[0010] It is conceivable that the linear adjustment can be performed manually in addition to the motor-driven linear adjustment described below. For example, by applying pressure to the backrest device along the translation axis from bottom to top, the headrest can be moved upwards to lock into one of the intermediate positions or into the second position. For the purpose of linear adjustment, at least one rack can be provided, which interacts with at least one gear. The at least one rack is aligned parallel to the translation axis. To achieve the locking function, a locking fitting can be provided, which enables locking in one of the aforementioned positions.

[0011] According to the invention, the backrest device comprises a motor for linearly adjusting the headrest, wherein the motor acts on the headrest via a support. The support comprises a first support part that is fixedly connected to the headrest, and a second support part that can be moved linearly by the motor. The first support part and the second support part are detachably connected to one another. This allows the two support parts to be moved independently of one another under certain circumstances. The detachable connection is such that the first support part and the headrest connected to it can be moved with the second support part when the first support part and the second support part are connected to one another by means of the detachable connection, and that the first support part and the headrest connected to it cannot be moved with the second support part when the first support part and the second support part are not connected to one another by means of the detachable connection.This configuration can prevent the headrest and the first support part from moving with the second support part during operation of the motor, which is about to effect a linear adjustment of the second support part from the second position to the first position, and, for example, from injuring a user holding the headrest. According to the invention, the detachable connection between the first support part and the second support part comprises a magnetic connection.

[0012] For aesthetic reasons, the motor may be concealed, in particular arranged in a housing formed in the backrest.

[0013] The invention is explained in more detail below using exemplary embodiments with reference to the figures. They show: Figure 1 shows a backrest device according to an embodiment of the invention with a headrest, wherein the headrest is in a first position; Figure 2 shows the backrest device fromFigure 1 , wherein the headrest is in a second position; Figure 3 shows the backrest device from Figure 1 , wherein the headrest is rotated about a rotation axis starting from the second position; Figure 4 shows the backrest device from Figure 3 in a rear view; Figure 5 the backrest device from the Figures 1 to 4 with a device for manual linear adjustment of the headrest of the backrest device between the first position and the second position, without upholstery cover; Figure 6Device made of Figure 5 , wherein the device assumes a configuration corresponding to the first position of the headrest; Figure 7Device of Figure 5 , the device assuming a configuration corresponding to the second position of the headrest; Figure 8 shows the backrest device from the Figures 1 to 4with a device for motor-driven linear adjustment of the headrest of the backrest device between the first position and the second position, without upholstery cover; Figures 9 and 10Device from Figure 8 , wherein the device assumes a configuration corresponding to the first position of the headrest; Figure 11Device from Figure 8 , wherein the device assumes a configuration corresponding to the second position of the headrest; Figure 12Device from Figure 8 with active pinch protection; Figure 13 the backrest device from the Figures 1 to 4 during the assembly process, whereby guide shafts of the headrest are guided into sockets of the backrest; Figure 14Socket made of Figure 13 for receiving and guiding a guide shaft of the headrest; and Figure 15Guide shafts made of Figure 13 with rat fittings.

[0014] Figure 1shows a perspective view of a backrest device 100 and a section of a seat element 200, which together with the backrest device 100 forms a piece of seating furniture 1 in the form of a sofa. The seat element 200 comprises a seat surface 201. The seat surface 201 is upholstered. The backrest device 100 comprises a backrest 110 and a headrest 120. The backrest 110 and the headrest 120 are also upholstered.

[0015] The headrest 120 is linearly displaceable relative to the backrest 110 along a translation axis T between a first (retracted) position and a second (extended) position. The headrest 120 can also assume one of several positions between the first and second positions and be locked in this position. Figure 1 the headrest 120 is shown in the first position. Figure 2 shows the backrest device 100 from Figure 1, but with the headrest 120 in the second position. As shown in the Figures 1 and 2 As can be seen, the headrest 120 always overlaps (both in the first and in the second position) in an overlap section 124 with the backrest 110. The extent of the overlap varies with the position of the headrest 120. The overlap section 124 always extends (i.e., regardless of the position of the headrest 120) over the entire width of the headrest 124. Only along the translation axis T does the extent of the overlap vary with the position of the headrest 120.

[0016] In addition to the Figures 1 and 2In the linear adjustment of the headrest 120 relative to the backrest 110 shown, the headrest 120 is pivotable about a rotation axis R to adjust the angle between the headrest 120 and the backrest 110. The rotation axis R extends substantially perpendicular to the translation axis T and along the width of the headrest 124. In the Figures 3 and 4 the headrest 120 is shown pivoted about the rotation axis R, wherein the rotation starts from the second position of the headrest 120 ( Figure 2). The angle between the headrest 120 and the backrest 110 can vary between 0° and 40°. Several intermediate positions are provided. The headrest 120 can be locked (latched) both in the intermediate positions and in the two outermost deflections. The angle between adjacent positions is 4° each. Accordingly, eleven different inclinations of the headrest 120 can be set by rotation about the rotation axis R. Even if the angle between the headrest 120 and the backrest 110 varies, the headrest 120 always overlaps with the backrest 110 in an overlap section 124.

[0017] In Figure 5The backrest device 100 is shown without upholstery. The backrest 110 and the headrest 120 each comprise a solid base body. The base body of the backrest 110 defines a receptacle 113. Two through-openings 111 are incorporated into the base body of the backrest 110, each of which serves to receive a guide shaft 121 arranged on the headrest 120. In each through-opening 111, a plug-in sleeve 112 is arranged, which covers the corresponding through-opening 111 and offers defined sliding properties with respect to the guide shaft 121. The plug-in sleeve 112 is connected to the through-opening 111 in a form-fitting manner, for example by a (spring-mounted) projection 1121 at one end and a projecting decorative cap 1122 at another end ( Figure 13 ). The plug-in sleeve 112 is shown in detail in Figure 14 shown. Figure 15shows a detailed view of the guide shafts 121. At their end facing the headrest 120, fittings 122 are arranged, which serve to fasten the respective guide shaft 121 to the headrest 120. Each fitting 122 is fastened to the respective guide shaft 121 via a joint 123. The fitting 122 and the joint 123 together are designed as a locking fitting. To mount the headrest 120 to the backrest 110, the guide shafts 121 are, as in Figure 13 shown, into the through-openings 111 with the plug-in sleeves 112.

[0018] In the embodiment of the Figure 5 The linear adjustment of the headrest 120 is carried out manually. An embodiment of the translation mechanism 130 used for the manual linear adjustment is shown in the Figures 6 and 7shown in more detail. Accordingly, the translation mechanism 130 comprises two racks 131, each cooperating with a gear 132. The racks 131 extend along the translation axis T. While the racks 131 are stationary, the gears 132 are adapted to move along the racks 131. The racks 131 are arranged at a distance from one another and are connected to one another via a first cross member 133. The cross member 133 is according to the Figures 6 and 7for example, arranged in an end region of the racks 131. However, it is also conceivable to provide more than one cross strut, for example, one in each end region. The gears 132 are connected to one another via a second cross strut 134. The second cross strut 134 extends parallel to the first cross strut 133. The second cross strut 134 can thus move with the gears 132. In contrast, the first cross strut 133 is stationary. The first and second cross struts 133, 134 are connected to one another via a locking fitting 135. This serves to hold the gears 132 in one of several predetermined positions relative to the racks 131. Figure 6 shows the translation mechanism 130 corresponding to the first position of the headrest 120. That is, when the headrest 120 is retracted. In this position, the second cross member 134 is in its lowest position. Figure 7shows the translation mechanism 130 corresponding to the second position of the headrest 120. That is, when the headrest 120 is extended. In this position, the second cross strut 134 is in its uppermost position. With the help of the locking fitting 135, the second cross strut 134 can assume a variety of positions between the uppermost and lowermost positions, and thus the headrest 120 can be locked (locked) at different heights. For example, the locking fitting 135 can comprise 23 locking positions. The height difference between the uppermost position of the second cross strut 134 and the lowermost position of the second cross strut 134 can be 15 cm. Other height differences are also conceivable.

[0019] To move the headrest 120 from a lower position to a higher position, it is sufficient to pull the headrest 120 upward. To move the headrest 120 from a higher position to a lower position, the headrest 120 must first be moved to its second position (uppermost position of the second cross strut 134) to release the locking fitting 135 from its locked state, so that the headrest 120 can then move downward to its first position (lowest position of the second cross strut 134).

[0020] Alternatively to the Figures 5 to 7In addition to the described translation mechanism 130 for manual linear adjustment of the headrest 120, the backrest device 100 may comprise a translation mechanism 140 for a motor-driven linear adjustment of the headrest 120. This translation mechanism 140 is, in its state installed in the base body of the backrest 110, in Figure 8 shown. Figure 9 shows the translation mechanism 140 from Figure 8 alone. The translation mechanism 140 comprises a bracket 141, which is provided for fastening the translation mechanism 140 in the backrest 110. A motor 143 is fastened to the bracket 141 via a linear guide 142. The linear guide 142 extends along the translation axis T. The linear guide serves to guide a carrier 144, which in the embodiment of the Figures 9 to 12is formed in two parts. The support 144 comprises a first support part 1441, which is connected to a cross strut 145 to which the headrest is attached, and a second support part 1442, which is linearly displaceable by the motor 143. The cross strut 145 extends transversely to the translation axis T and along the width of the headrest 124.

[0021] Figure 9 illustrates the translation mechanism 140 in a configuration corresponding to the first position of the headrest 120. Figure 10 shows the translation mechanism 140 from Figure 9 without the bracket 141 and in a view rotated by 180° around the translation axis T. Figure 11 shows the translation mechanism 140 from Figure 10 , but the configuration corresponds to that of the second position of the headrest 120. In the Figures 10 and 11The first and second support parts 1441, 1442 are clearly visible. During normal operation of the translation mechanism 140, the motor 143 drives the second support part 1442. The first support part 1441, which is connected to the second support part 1442 via a detachable connection, moves together with the second support part 1442 ( Figures 10 and 11 ).

[0022] Due to the detachable connection between the first and second support parts 1441, 1442, the movement of the second support part 1442 can be decoupled from that of the headrest 120 (connected to the first support part 1441 via the cross strut 145) by applying a force ( Figure 12). In particular, the detachable connection is such that, on the one hand, the first support part 1441 and the headrest 120 connected to it are displaceable with the second support part 1442 when the first support part 1441 and the second support part 1442 are connected to one another by means of the detachable connection, and that, on the other hand, the first support part 1441 and the headrest 120 connected to it are not displaceable with the second support part 1442 when the first support part 1441 and the second support part 1442 are not connected to one another by means of the detachable connection. By releasing the detachable connection, during operation of the motor 143, which causes a linear adjustment of the second support part 1442 in the direction of the first position of the headrest 120, the headrest 120, the cross strut 145 and the first support part 1441 can be prevented from moving with the second support part 1442.This can, for example, prevent a user holding the headrest 120 from being injured, particularly by the lowering headrest 120, from becoming trapped. The detachable connection thus functions as a pinch guard. The detachable connection is designed, for example, as a magnetic connection. In particular, the magnetic connection can be designed such that it releases upon a counterforce of 9 kg, so that although the second support part 1442 can be adjusted linearly by the motor 142, the first support part 1441 does not move with the second support part 1442.

[0023] The translation mechanism 130, 140 is arranged in the receptacle 113 of the backrest 110.

Claims

1. A backrest device (100) for a piece of seating and / or reclining furniture (1) comprising a backrest (110) and a head rest (120), wherein the head rest (120) is linearly adjustable along a translation axis (T) with respect to the backrest (110) between a first position and a second position, and wherein the head rest (120) includes an overlapping portion (124) which always overlaps with a part of the backrest (110) so that no gap is formed between the backrest (110) and the head rest (120) when the head rest (120) is in the first position, the second position and an intermediate position, wherein the backrest device (100) comprises a motor (143) for the linear adjustment of the head rest (120), wherein the motor (143) acts on the head rest (120) via a carrier (144), wherein the carrier (144) comprises a first carrier part (1441) which is firmly connected with the head rest (120) and a second carrier part (1442) which is linearly shiftable by the motor (143), wherein the first carrier part (1441) and the second carrier part (1442) are releasably connected with each other, wherein the first carrier part (1441) and the head rest (120) connected with the same are shiftable with the second carrier part (1442) when the first carrier part (1441) and the second carrier part (1442) are connected with each other via the releasable connection, and wherein the first carrier part (1441) and the head rest (120) connected with the same are not shiftable with the second carrier part (1442) when the first carrier part (1441) and the second carrier part (1442) are not connected with each other via the releasable connection, and characterized in that the releasable connection between the first carrier part (1441) and the second carrier part (1442) comprises a magnetic connection.

2. The backrest device (100) according to claim 1, characterized in that the overlapping portion (124) extends in a main plane of extension and that at least in the viewing direction perpendicularly to the main plane of extension the overlapping portion (124) always overlaps with a part of the backrest (110).

3. The backrest device (100) according to claim 1 or 2, characterized in that the overlapping portion (124) always overlaps with a part of the backrest (110) over the entire width of the head rest (120).

4. The backrest device (100) according to any of the preceding claims, characterized in that the translation axis (T) and the main plane of extension of the overlapping portion (124) of the head rest (120) include an angle unequal to 90°.

5. The backrest device (100) according to any of the preceding claims, characterized in that between the first position and the second position a plurality of intermediate positions are provided, which can be set by linearly adjusting the head rest (120) with respect to the backrest (110) along the translation axis (T).

6. The backrest device (100) according to any of the preceding claims, characterized in that the head rest (120) can be pivoted about a rotation axis (R) which substantially is directed perpendicularly to the translation axis (T) so that an inclination of the head rest (120) with respect to the backrest (110) can be set.

7. The backrest device (100) according to any of the preceding claims, characterized in that the linear adjustment is effected manually and that for the linear adjustment at least one toothed rack (131) is provided, which cooperates with at least one gear wheel (132).

8. The backrest device (100) according to any of the preceding claims, characterized in that the motor (143) is arranged in a receptacle (113) which is formed in the backrest (110).

9. A piece of seating and / or reclining furniture (1) comprising a backrest device (100) according to any of the preceding claims and comprising a seating and / or reclining element (200), respectively.