SEAT, ESPECIALLY VEHICLE SEAT

Abstract

Seat (100, 1000), in particular vehicle seat, comprising at least the following - a seat support structure (130) comprising at least one fixed base element (140), a seat shell (102) and a backrest (104) which are adjustable relative to the base element (140), and - a tilting mechanism (200) configured to move the seat support structure (130) between an upright sitting position (150) and at least one horizontal bed position (152), characterized in that - the tilting mechanism (200) comprises a first linkage mechanism (210) with which the seat shell (102) is coupled to the base element (140), and a second linkage mechanism (220) with which the backrest (104) is coupled to the base element (140), - wherein both linkage mechanisms (210, 220) are held in a decoupled state (202) relative to each other in the upright sitting position (150) and assume a coupled state (204) when the tilting mechanism (200) is actuated in order to transfer the seat support structure (130) into the horizontal bed position (152), - wherein the linkage mechanisms (210, 220) comprise coupling elements (310, 320) which are spaced apart from each other in the decoupled state (202) and engage with each other in the coupled state (204), - wherein the first linkage mechanism (210) comprises at least a first coupling element (310) which is movably guided in a guide element (146) which is arranged on the fixed base element (140).

Description

BACKGROUND OF THE REVELATION

[0001] The invention relates to a seat, in particular a vehicle seat, comprising at least one seat support structure and a tilting mechanism designed to move the seat support structure between an upright sitting position and at least one horizontal bed position.

[0002] A wide variety of adjustable, especially tiltable, seats, such as those used in transport vehicles or aircraft passenger seats, are known from the prior art. A vehicle seat, for example, comprises at least a seat shell and a backrest, the backrest being pivotably coupled to the seat shell. The backrest can be coupled to the seat shell via a driven tilting mechanism. Furthermore, the vehicle seat can include a rail assembly for adjusting the vehicle seat longitudinally.

[0003] For example, a lifting mechanism for an edge of a seat cushion is known from DE 10 2018 127 996 A1. SUMMARY OF THE REVELATION

[0004] An objective of the present disclosure is to provide an improved seat, in particular a vehicle seat, which is easily adjustable between at least one upright initial seating position, such as an entry / exit and sitting position, and at least one horizontal bed position in which the seat shell and backrest form an extended lying surface. In particular, an objective of the present disclosure is to provide a robust, less complex, and user-friendly seat that includes a tilting mechanism designed to transfer the seat with maximum comfort through an entire range of seat adjustment movements.

[0005] The object of the invention is achieved according to the invention by a seat having the features specified in claim 1.

[0006] Preferred embodiments of the invention are set forth in the dependent claims.

[0007] To achieve the above objectives, the present invention comprises a seat, in particular a vehicle seat, comprising at least one seat support structure, which includes at least one fixed base element, a seat shell, and a backrest adjustable relative to the base element, as well as a tilting mechanism configured to move the seat support structure between an upright sitting position and at least one horizontal bed position. The tilting mechanism comprises a first linkage mechanism by which the seat shell is coupled to the base element, and a second linkage mechanism by which the backrest is coupled to the base element, wherein both linkage mechanisms are held in a decoupled state relative to each other in the upright sitting position and assume a coupled state when the tilting mechanism is actuated in order to transfer the seat support structure into the horizontal bed position.

[0008] The advantages achieved with the invention consist of a uniform and smooth seat adjustment movement during the transfer of the seat support structure, i.e., the seat shell and the backrest, from the upright sitting position to the horizontal bed position. The linkage mechanisms can be coupled to perform a combined movement, particularly an adjustment movement. In one possible embodiment, fewer drive units, such as motor units, are therefore required to actuate the linkage mechanism.

[0009] Due to the large number of adjustment options, seat support structures, such as subframes, are often very complicated, which, however, leads to high material costs and high manufacturing costs for such seats.

[0010] The seat according to the invention provides two linkage mechanisms which are held in a decoupled state with respect to each other in the upright sitting position and assume a coupled state when the tilting mechanism is actuated in order to transfer the seat support structure into the horizontal bed position, whereby the seat can be designed to be essentially compact, with less weight and comparatively optimized in terms of components.

[0011] The tilting mechanism can comprise only one drive unit coupled to one of the linkage mechanisms, wherein the linkage mechanisms are moved by actuating one of the linkage mechanisms in such a way that it couples the other of the linkage mechanisms to perform a combined movement, in particular a tilting movement. It is understood that more than one drive unit can be used for the tilting mechanism, but this can be avoided.

[0012] In the case of a manually operated tilting mechanism, the tilting mechanism can be operated with one hand to rotate the seat support structure between the upright sitting position and the horizontal bed position. The invention provides improved seat adjustment functionality. The tilting mechanism helps to raise the seat shell like a seat cushion while simultaneously tilting the backrest. The user can, for example, push or pull the backrest; that is, the user can manually operate the second linkage mechanism to achieve a combined adjustment movement of the seat shell and backrest from the upright sitting position to the horizontal bed position and vice versa.The tilting mechanism is designed in such a way that the return of the seat support structure from the horizontal bed position to the upright sitting position can also be carried out as a combined adjustment movement, which is driven, for example, by the drive unit and / or by one-handed operation.

[0013] The linkage mechanisms, when coupled, can be designed to move the seat shell and backrest simultaneously. The seat shell and backrest can then comfortably and uniformly adjust between an upright sitting position, at least one inclined intermediate position, and a horizontal bed position.

[0014] The upright sitting position can be the starting position, in which the backrest is essentially perpendicular to the seat shell. An axis passing through the backrest can be, for example, arranged at an angle of approximately 3° to 17° to a vertical axis. The inclined intermediate position can be a comfort position, in which the backrest is arranged at a more inclined angle to the seat. The axis passing through the backrest can be, for example, arranged at an angle of approximately 17° to less than 80° to the vertical axis. The horizontal bed position can be a sleeping or reclining position, in which the backrest forms an essentially horizontal plane with the seat. Here, the axis passing through the backrest can be arranged at an angle of approximately 85° to 90° to a vertical axis.The axis passing through the backrest can, in particular, be arranged essentially parallel to a horizontal axis and form a horizontal lying plane with the seat shell.

[0015] The linkage mechanisms can be designed to raise the seat shell around a first horizontal pivot axis and tilt the backrest around a second horizontal pivot axis when coupled. The first horizontal pivot axis can be different from the second horizontal pivot axis.

[0016] The first horizontal pivot axis of the seat shell can be defined by a fixed pivot joint located in a front section of the seat shell. This front fixed pivot joint can be coupled to and / or located on the base element. The second horizontal pivot axis of the backrest can be defined by a fixed pivot joint located on and / or coupled to the base element, for example, in the area of ​​a crossbar and / or a fitting device, such as a common tilting system. The fixed pivot joint refers to a fixed position on the base element.

[0017] The tilting mechanism can be designed such that the coupled state of the linkage mechanisms is achieved by actuation such as manual actuation and / or motor-driven actuation of the second linkage mechanism with respect to the base element.

[0018] A drive unit can be coupled to the fixed pivot point of the backrest and / or to the crossbar and / or the fitting. By rotating the fixed pivot point, the second linkage mechanism can be pivoted around the fixed pivot point, which defines a horizontal pivot axis. Alternatively or optionally, the backrest can also include an actuating element, such as an operating lever, which the user can pull to initiate the movement of the second linkage mechanism.

[0019] The linkage mechanisms can include coupling elements that are spaced apart at the ends of the linkage mechanisms and, in the decoupled state, engage with each other when coupled. The coupling elements can be designed as corresponding detent elements, clip elements, projecting tabs, and recesses that can engage with each other in a detachable manner.

[0020] The first linkage mechanism can comprise at least one first coupling element movably guided in a guide element arranged on the defined base element. The second linkage mechanism can comprise at least one second coupling element with a receiving section that, in the coupled state, comes into contact, and in particular engages, with the first coupling element. Furthermore, the second linkage mechanism can comprise a third coupling element with a receiving section that, in the coupled state, comes into contact, and in particular engages, with the first coupling element.

[0021] The contact or engagement of the second coupling element with the first coupling element can, for example, initiate movement of the first linkage mechanism when the second linkage mechanism is actuated, particularly when moved, from the upright sitting position and / or the inclined intermediate position to the horizontal bed position. Similarly, the contact or engagement of the third coupling element with the first coupling element can, for example, initiate movement of the first linkage mechanism when the second linkage mechanism is actuated, particularly when moved, from the horizontal bed position to the inclined intermediate position and / or the upright sitting position.

[0022] The tilting mechanism can be designed to transfer the seat support structure from one position to another by moving the first coupling element along the guide element through movement of the second coupling element and optionally also the third coupling element.

[0023] The tilting mechanism can include a free-running section between the linkage mechanisms, allowing the backrest to be tilted from an upright sitting position to an intermediate inclined position before the linkage mechanisms engage to transfer the seat support structure to the horizontal bed position. This free-running section can be a predefined distance between the second coupling element and, optionally, the third coupling element of the second linkage mechanism and the first coupling element of the first linkage mechanism.

[0024] At a backrest angle of approximately 65° to 80°, for example, approximately 78°, the coupling elements of both linkage mechanisms come into contact, specifically engaging, thereby leveling the backrest and seat shell to a sleeping or lying surface, specifically the horizontal bed position. This means that the backrest can be tilted by up to 65° to 80° without any combined movement of the seat shell to assume an inclined intermediate position, specifically a reclined comfort position. The seat shell can remain in its original upright sitting position. Further movement of the backrest towards its horizontal bed position causes the linkage mechanisms to come into contact with each other, so that the seat shell is raised with the movement of the backrest to assume the horizontal bed position.

[0025] The first linkage mechanism can comprise two fixed pivot joints, between which a first number of relatively pivotable linkage links are arranged, the fixed pivot joints coupling the seat shell to the base element.

[0026] The second linkage mechanism may include a fixed pivot joint that couples the backrest to the base element, as well as a second number of pivoting linkage links that can pivot around the fixed pivot joint.

[0027] The linkage components can be rods or bars, or similar. The first linkage mechanism can be located in the back of the seat shell.

[0028] The further scope of applicability of the present invention, as well as advantageous embodiments that can be used individually or in combination, will become apparent from the detailed description below. It should be understood, however, that while the detailed description and specific examples indicate preferred embodiments of the invention, they serve only for illustrative purposes, since various changes and modifications in the spirit and scope of the invention will be obvious to those skilled in the art from this detailed description. DETAILED DESCRIPTION OF PREFERRED EXECUTION FORMS

[0029] The present invention will be better understood with reference to the following description and the accompanying drawings, which serve only for illustration and thus do not limit the present invention. They show: Fig. 1: a seat, in particular a vehicle seat, from the state of the art, Fig. 2: a seat according to a first embodiment comprising a seat support structure and a tilting mechanism to move the seat support structure between an upright sitting position and at least one horizontal bed position, Fig. 3: the seat to Fig. 2 in an inclined intermediate position, Fig. 4: the seat to Fig. 3 in the horizontal bed position, Fig. 5: a tilting mechanism according to a second embodiment comprising two linkage mechanisms which are in a decoupled state in an upright sitting position of the seat, Fig. 6: Possible sequences of movements of the tilting mechanism according to Fig. 5, Fig. 7: the tilting mechanism according to Fig. 5 in an inclined intermediate position and Fig. 8: the tilting mechanism according to Fig. 5 in a horizontal bed position.

[0030] Corresponding parts are designated with the same reference symbols in all figures.

[0031] A schematic in Fig. The prior art vehicle seat 100 shown in Figure 1 is described below using three spatial axes or directions extending perpendicular to each other. A longitudinal axis x runs horizontally and preferably parallel to a longitudinal direction of a vehicle with a vehicle seat 100 installed in the vehicle. The longitudinal direction corresponds to the usual direction of travel of the vehicle. A transverse axis y is also oriented horizontally in the vehicle and extends perpendicular to the longitudinal direction and parallel to a transverse direction of the vehicle. A vertical axis z runs perpendicular to the longitudinal direction and perpendicular to the transverse direction. In the case of a vehicle seat 100 installed in the vehicle, the vertical axis z preferably runs parallel to a vehicle height direction.

[0032] The position and direction terms used, such as front, rear, top, and bottom, refer to the viewing direction of an occupant sitting in an upright position 150, as in a normal sitting position on the vehicle seat 100. The vehicle seat 100 is installed in the vehicle in a suitable position for passenger transport with an upright backrest 104, and is oriented in the direction of travel as usual. However, the vehicle seat 100 can also be installed or moved in a different orientation, for example, perpendicular to the direction of travel. Unless otherwise specified, the vehicle seat 100 is designed to be mirror-symmetrical with respect to a plane perpendicular to the transverse direction y.

[0033] The backrest 104 can be pivotably mounted on a seat shell 102 of the vehicle seat 100. For this purpose, the vehicle seat 100 can optionally include a fitting 106, in particular an adjustment fitting, a swivel fitting, a locking fitting or a wobble fitting.

[0034] The position and direction specifications used, such as radial, axial, and circumferential, refer to a rotation axis 108 of the fitting device 106. Radial means perpendicular to the rotation axis 108; axial means in the direction of the rotation axis 108 or parallel to it.

[0035] The vehicle seat 100 can optionally include a longitudinal adjustment device 110. The longitudinal adjustment device 110 has, for example, a rail assembly 112 with a first rail element 114 and a second rail element 116. The first rail element 114 is adjustable in a longitudinal direction relative to the second rail element 116. The first rail element 114 is attached to the seat shell 102. The second rail element 116 is attached to a structural element of a vehicle, for example, a vehicle floor.

[0036] For clarity, the first rail element 114 will be referred to as the upper rail 114 in the following description. This upper rail 114 (also referred to as the running rail or slide) is associated with the vehicle seat 100 and is designed to support the vehicle seat 100. The second rail element 116 will be referred to as the lower rail 116. The lower rail 116 is fixed and is, for example, connected to the floor of a vehicle.

[0037] The known vehicle seat 100 with the fitting device 106 is designed such that the fitting device 106, in particular its axis of rotation 108, couples the seat shell 102 and the backrest 104 with respect to each other. The backrest 104 can be pivotable about the axis of rotation 108. The seat shell 102 can be stationary with respect to the axis of rotation 108.

[0038] Furthermore, the commonly known stationary seat shell 102 comprises a front section 118, for example, a padded front section, which is raised from and / or projects outwards from a horizontal central surface of the seat shell 102. Such a front section 118 can form a thigh support, in particular a front cushion and / or a side cushion. Alternatively or additionally, the front section 118 of the seat shell 102, which supports the thighs of a passenger, can be raised and / or angled relative to a lower rear section 120, which, for example, supports the buttocks of the passenger.

[0039] To provide greater comfort for the passenger, it is desirable to provide a seat 1000 as described below, which offers a horizontal bed position 152 in which the seat shell 102 and the backrest 104 can form an essentially horizontal lying or sleeping surface, as shown in Fig. 4, Fig. 6 and Fig. 8 shown, can be assumed. For greater comfort, it is desirable to provide a movable, for example swiveling, and in particular liftable, seat shell 102. It is particularly desirable to provide a movable, for example swiveling, and in particular liftable, rear section 120 of the seat shell 102, while maintaining a thigh support function of the front section 118 when the seat 1000 is arranged in the upright sitting position 150.

[0040] Fig. Figure 2 shows a seat 1000 according to a first embodiment, comprising a seat support structure 130 and a tilting mechanism 200 to move the seat support structure 130 between an upright sitting position 150 and at least one horizontal bed position 152.

[0041] The seat support structure 130 comprises the backrest 104 and the seat shell 102. The seat support structure 130 can be a seat frame structure. The seat support structure 130 can include a backrest frame that supports upholstery forming an upholstered backrest 104. The seat support structure 130 can include a seat shell frame that supports upholstery forming an upholstered seat shell 102.

[0042] Furthermore, the seat support structure 130 comprises a defined base element 140. The defined base element 140 can be a base structure that, for example, supports or couples the seat support structure 130 to the vehicle floor, a vehicle structure, and / or the rail assembly 112. The defined base element 140 can be a frame structure. The defined base frame 140 can include a defined rear base section 142. The defined base frame 140 can include a defined front base section 144. The defined base sections 142 and 144 can be vertically extending frame elements that connect the seat shell 102 to the vehicle floor, a vehicle structure, and / or the rail assembly 112, in particular to the movable first rail element 114.The base sections 142, 144 can be coupled to each other via a horizontally extending base section and / or a frame element, which are not shown further.

[0043] The tilting mechanism 200 comprises a first linkage mechanism 210 that couples the seat shell 102 to the base element 140, and a second linkage mechanism 220 that couples the backrest 104 to the base element 140, with both linkage mechanisms 210, 220 being held in a decoupled state 202 with respect to each other in the upright sitting position 150.

[0044] When one of the linkage mechanisms 210, 220, i.e., the first linkage mechanism 210 or the second linkage mechanism 220, is actuated, the actuated linkage mechanism 210, 220 can be continuously moved from the upright sitting position 150 to the horizontal bed position 152. Along a path of a predetermined adjustment distance, for example, at an adjustment angle, the linkage mechanisms 210, 220 can remain in the decoupled state 202, so that the backrest 104 can be tilted from the upright sitting position 150 to at least one inclined intermediate position 154 without affecting the position of the seat shell 102.

[0045] In the inclined intermediate position 154, which is in Fig. 3, Fig. 6 and Fig. As shown in Figure 7, the linkage mechanisms 210, 220 can, for example, assume a coupled state 204. In the coupled state 204, both linkage mechanisms 210, 220 are coupled together, i.e., connected to each other, so that a further actuation, i.e., movement of the same linkage mechanism 210, 220 that was previously actuated, results in a common or combined movement of both linkage mechanisms 210, 220 into the horizontal bed position 152. The actuation can be motor-driven and / or manual.

[0046] Thus, it may be sufficient to equip the tilting mechanism 200 with a single drive unit 230 or a single actuator to achieve the adjustment of the seat support structure 130 from its upright sitting position 150 to the horizontal bed position 152 and vice versa. Furthermore, to successfully tilt the seat support structure 130, it may be sufficient to manually operate the seat shell 102 or the backrest 104, for example, by moving, pulling, or pushing it, to achieve a complete adjustment of the seat support structure 130 from its upright sitting position 150 to the horizontal bed position 152 and vice versa.

[0047] The first linkage mechanism 210 can include a first fixed pivot joint 212, which is attached to the base element 140 in a region of the front base section 144. The first linkage mechanism 210 can include a second fixed pivot joint 214, which is attached to the base element 140 in a region of the rear base section 142. Fig. Figures 4 to 8 reveal the second fixed pivot joint 214. The first linkage mechanism 210 can comprise a first number of relatively pivotable linkage links 216a to 216d, also known as rods, arranged between the fixed pivot joints 212 and 214. The linkage links 216a to 216d are coupled to one another via a number of pivot joints 218a to 218d. The first linkage mechanism 210 can be a so-called multi-link linkage, such as a four-link, five-link, or six-link linkage. In this embodiment, the first linkage mechanism 210 is configured as a four-link linkage. The second linkage mechanism 220 is designed as a single linkage arm or a single linkage lever.

[0048] A first linkage 216a is movably coupled to the base element 140, particularly in a region of the rear base section 142, via a first pivot joint 218a. A second linkage 216b is pivotally coupled to the first linkage 216a via a second pivot joint 218b. The second linkage 216b can be a linkage plate, which is, for example, essentially L-shaped and designed to pivotally couple linkages 216a to 216d to the second fixed pivot joint 214. A third linkage 216c is pivotally coupled to the second linkage 216b, and a fourth linkage 216d is also pivotally coupled to the second linkage 216b. The third link 216c is coupled to the second link 216b via a third pivot joint 218c. The fourth link 216d couples the link links 216a to 216d to the first fixed pivot joint 212. The fourth link 216d is coupled to the third link 216c via a fourth pivot joint 218d.

[0049] The second linkage mechanism 220 can include a fixed pivot joint 222, which is attached to the base element 140 in a region of the rear base section 142. The fixed pivot joint 222 can be provided by a known crossbar (not shown) that couples two structural sides, for example, frame sides, of the seat support structure 130. The second linkage mechanism 220 can include a second set of pivotable linkage links 224a, 224b, which are pivotable about the fixed pivot joint 222. In the embodiment shown, the second linkage mechanism 220 includes a first linkage link 224a that defines a backrest surface. The second linkage mechanism 220 includes a second linkage link 224b that is coupled to a lower side of the first linkage link 224a.The rod links 224a, 224b can be designed as a one-piece part, which is designed as a backrest frame and / or as a backrest fitting part.

[0050] The linkage mechanisms 210, 220 comprise corresponding coupling elements 310, 320, which are spaced apart from one another in the uncoupled state 202 and engage in the coupled state 204. The first pivot joint 218a of the first linkage mechanism 210 can form a first coupling element 310. The first coupling element 310 can be a bolt projecting in the transverse direction. The second linkage mechanism 220 can comprise a second coupling element 320. The second coupling element 320 can be arranged on an opposite, in particular lower, side of the backrest 104. The second coupling element 320 can be fixedly arranged on one of the linkage links 224a, 224b. In the embodiment shown, the second coupling element 320 is arranged on the second linkage link 224b and is designed as a projecting tab or lug. The second coupling element 320 can project radially with respect to the defined pivot joint 222.The rod links 224a, 224b are attached to each other.

[0051] The base element 140, in particular the rear base section 142, can comprise a guide element 146. The guide element 146 can be provided on an upper side of the base element 140, in particular the rear base section 142. The guide element 146 can have a bent or curved shape. The guide element 146 can be bent or curved such that a center point of the arc or curvature can be arranged coaxially with the defined pivot joint 222.

[0052] The first coupling element 310, in particular the first pivot joint 218a, is movably guided in the guide element 146, which is arranged on the fixed base element 140. The guide element 146 can be a slotted hole, in particular a longitudinal hole, which forms a sliding fixation for the first coupling element 310. The second coupling element 320 can comprise a receiving section 322, which engages with the first coupling element 310 in the coupled state. The tilting mechanism 200 is configured to transfer the seat shell 102 and the backrest 104 from one position 150 to another 154 by moving the first coupling element 310 along the guide element 146 via movement of the second coupling element 320 when the coupling elements 310 and 320 are in the coupled state 204.

[0053] The tilting mechanism 200 can include a free-running range 240 between the first coupling element 310 and the second coupling element 320, allowing the backrest 104 to be tilted from the upright sitting position 150 into an inclined intermediate position 154 before the coupling elements 310 and 320 engage in the coupled state 204 to transfer the seat shell 102 and the backrest 104 into the horizontal bed position 152. The free-running range 240 can define a distance between the first coupling element 310 and the second coupling element 320 in which both coupling elements 310 and 320 can be in the uncoupled state 202.

[0054] Fig. 3 shows the seat 1000 degrees to Fig. 2 in an inclined intermediate position 154.

[0055] The tilting mechanism 200 is designed such that the coupled state 204 of the linkage mechanisms 210, 220 is achieved by actuation, such as manual actuation and / or motor-driven actuation, of the second linkage mechanism 220 with respect to the base element 140. The second linkage mechanism 220 can be coupled to the drive unit 230. The drive unit 230 can be a tilting drive or actuator. The drive unit 230 can be coupled to the fixed pivot joint 222 to pivot the linkage links 224a, 224b. By rotating the fixed pivot joint 222, for example a backrest fitting or a fitting rod and / or the linkage links 224a, 224b, the second linkage mechanism can be pivoted about the fixed pivot joint 222, which defines a second horizontal pivot axis y2, which runs, for example, parallel to the transverse axis y.

[0056] The linkage mechanisms 210, 220 are designed in the coupled state 204 to raise the seat shell 102 about a first horizontal pivot axis y1, which runs parallel to the transverse axis y, for example.

[0057] Fig. 4 shows the seat 1000 degrees to Fig. 3 in the horizontal bed position 152.

[0058] The linkage mechanisms 210, 220 are specifically designed to raise the seat shell 102 by raising the third and fourth linkage links 216c, 216d, as shown in Fig. Figure 4 shows that this allows the rear section 120 of the seat shell 102 to be raised in a continuous movement while maintaining the thigh support function of the front section 118 of the seat shell 102. The fixed pivot joints 212, 214 of the first linkage mechanism 210 are spaced apart from each other vertically and longitudinally. The first to third linkage links 216a to 216c are located below the rear section 120 of the seat shell 102. The linkage links 216a to 216d are pivoted relative to each other between two fixed pivot joints 212, 214, so that both the rear section 120 and a seat surface provided between the rear section 120 and the front section 118 of the seat shell 102 are raised with respect to the first horizontal pivot axis y1.

[0059] For moving the seat support structure 130 back from the horizontal bed position 152 to the upright sitting position 150 or to the inclined intermediate position 154, the second linkage mechanism 220 can include a third coupling element 330, which has a receiving section 332 that comes into contact, and in particular engages, with the first coupling element 310, i.e., with the first linkage mechanism 210, during a return movement. The tilting mechanism 200 is designed to transfer the seat shell 102 and the backrest 104 from the horizontal bed position 152 to the inclined intermediate position 154 and / or the upright sitting position by moving the first coupling element 310 along the guide element 146 by moving the third coupling element 330.

[0060] Alternatively or optionally, the first linkage mechanism 210 can be spring-loaded so that the first coupling element 310, and thus the first linkage mechanism 210, follows the return movement by spring force when the second coupling element 320 is moved away from the first coupling element 310. The third coupling element 330 may not be required.

[0061] Fig. Figure 5 shows a tilting mechanism 200 according to a second embodiment, comprising two linkage mechanisms 210, 220 which are in a decoupled state 202 in an upright sitting position 150 of the seat 1000.

[0062] The tilting mechanism 200 comprises a first linkage mechanism 210, which couples the seat shell 102 to the base element 140, and a second linkage mechanism 220, which couples the backrest 104 to the base element 140, with both linkage mechanisms 210, 220 being held in a decoupled state 202 relative to each other in the upright sitting position 150. When one of the linkage mechanisms 210, 220, i.e., the first linkage mechanism 210 or the second linkage mechanism 220, is actuated, the actuated linkage mechanism 210, 220 can be simultaneously moved from the upright sitting position 150 to the horizontal bed position 152.

[0063] The first linkage mechanism 210 can be a so-called multi-link linkage such as a four-link linkage, a five-link linkage or a six-link linkage.

[0064] The second linkage mechanism 220 can include a fixed pivot joint 222, which is attached to the base element 140 in a region of the rear base section 142. In the embodiment shown, the second linkage mechanism 220 includes a first link 224a, which defines a backrest surface. The second linkage mechanism 220 includes a second link 224b, which is coupled to a lower side of the first link 224a. The link 224a and 224b can be configured as a single part, which is designed as a backrest frame and / or as a backrest fitting. The linkage mechanisms 210, 220 include corresponding coupling elements 310, 320, which are spaced apart from each other in the decoupled state 202 and engage in the coupled state 204.

[0065] The first pivot joint 218a of the first linkage mechanism 210 can form a first coupling element 310. The first coupling element 310 can be a bolt projecting in the transverse direction. The second linkage mechanism 220 can include a second coupling element 320. The second coupling element 320 can be fixedly arranged on one of the linkage links 224a, 224b. In the embodiment shown, the second coupling element 320 is arranged on the second linkage link 224b and is designed as a receptacle. The second coupling element 320 can be a recess formed in the second linkage link 224b. The second linkage link 224b projects radially with respect to the fixed pivot joint 222. The linkage links 224a, 224b are attached to one another.

[0066] Fig. Figure 6 shows possible movement sequences of the tilting mechanism 200°. Fig. 5.

[0067] The upright sitting position 150 can be the starting position, in which the backrest 104 can be arranged substantially perpendicular to the seat shell 102. The first link 224a can, for example, be arranged at a first angle α1 of approximately 3° to 17° (more or less) to the vertical axis z. The inclined intermediate position 154 can be a comfort position, in which the backrest 104 can be arranged at a more inclined position relative to the seat shell 102. The first link 224a can, for example, be arranged at a second angle α2 of approximately 17° to less than 80° to the vertical axis z. The horizontal bed position 152 can be a sleeping or reclining position, in which the backrest 104 forms a substantially horizontal plane with the seat shell 102. Here, the first linkage element 224a can be arranged at a third angle α3 of approximately 85° to 90° to the vertical axis z.In the upright seating position 150, the seat shell 102 can be arranged essentially parallel to a vehicle floor. The seat shell 102 can be pivoted about the first fixed pivot joint 212 from the upright seating position 150 to the horizontal bed position 152 between an angle β1 of approximately 5° to 20°. It is understood that the angle ranges are intended only for better understanding, but are not limited to them.

[0068] Furthermore, the movement paths 412 to 418 of the linkage links 216a to 216d and / or the pivot joints 218a to 218d of the first linkage mechanism 210 from the upright sitting position 150 to the horizontal bed position 152 or vice versa are marked with dashed lines. Additionally, the movement paths 422 to 424 of the linkage links 224a, 224b of the second linkage mechanism 220 are marked with dashed lines.

[0069] A first movement path 412 is assigned to a movement of the first pivot joint 218a and the at least one coupled linkage link 216a to 216d. A second movement path 414 is assigned to a movement of the second pivot joint 218b and the at least one coupled linkage link 216a to 216d. A third movement path 416 is assigned to a movement of the third pivot joint 218c and the at least one coupled linkage link 216a to 216d. A fourth movement path 418 is assigned to a movement of the fourth pivot joint 218d and the at least one coupled linkage link 216a to 216d.

[0070] A fifth movement path 422 is assigned to a movement of the linkage links 224a, 224b of the second linkage mechanism 220 with respect to the fixed pivot joint 222 from the upright sitting position 150 to the inclined intermediate position 154. A sixth movement path 424 is assigned to a movement of the linkage links 224a, 224b of the second linkage mechanism 220 with respect to the fixed pivot joint 222 from the upright sitting position 150 to the horizontal bed position 152.

[0071] Fig. Figure 7 shows the tilting mechanism 200 degrees. Fig. 5 in an inclined intermediate position 154 and Fig. Figure 8 shows the tilting mechanism 200 degrees. Fig. 5 in a horizontal bed position 152.

[0072] The first linkage mechanism 210 comprises at least one first coupling element 310, which is movably guided in a guide element 146 arranged on the fixed base element 140. The second linkage mechanism 220 comprises at least one second coupling element 320 with a receiving section 322, which, in the coupled state 204, comes into contact, in particular engages, with the first coupling element 310, as shown in Fig. Figure 7 shows that the coupled state 204 is assumed in the inclined intermediate position 154.

[0073] For example, when the second coupling element 320 contacts or engages with the first coupling element 310, a movement of the first linkage mechanism 210 can be initiated when the second linkage mechanism 220 is actuated, in particular moved, from the inclined intermediate position 154 to the horizontal bed position 152. The tilting mechanism 200 can be configured to transfer the seat support structure 130 by moving the first coupling element 310 along the guide element 146 via movement of the second coupling element 320.

[0074] The tilting mechanism 200 can include a free-running range 240 between the first coupling element 310 and the second coupling element 320, allowing the backrest 104 to be tilted from the upright sitting position 150 into an inclined intermediate position 154 before the coupling elements 310 and 320 engage in the coupled state 204 to transfer the seat shell 102 and the backrest 104 into the horizontal bed position 152. The free-running range 240 can define a distance between the first coupling element 310 and the second coupling element 320 in which both coupling elements 310 and 320 can be in the uncoupled state 202. Reference number list 100, 1000 seats 102 Seat shell 104 Backrest 106 Fitting device 108 Rotation axis 110 Longitudinal adjustment device 112 Rail assembly 114 first rail element (upper rail) 116 second rail element (lower rail) 118 front section 120 rear section 130 seat support structure 140 basic element 142, 144 Basic section 146 Guide element 150 position, especially upright sitting position 152 Position, especially horizontal bed position 154 Position, in particular inclined intermediate position 200 tilting mechanism 202 decoupled state 204 coupled state 210 Linkage mechanism, in particular first linkage mechanism 212 fixed pivot joint, in particular first fixed pivot joint 214 fixed pivot joint, in particular second fixed pivot joint 216a to 216d Linkage 218a to 218d Swivel joint 220 Linkage mechanism, in particular second linkage mechanism 222 fixed pivot joint 224a to 224b Linkage 230 drive unit 240 free-running area 310 Coupling element, in particular first coupling element 320 Coupling element, in particular second coupling element 322 Recording section 330 Coupling element, in particular third coupling element 332 Recording section 412 to 424 Movement path α1 to α3, β1 angle y1, y2 horizontal swivel axis x Longitudinal axis y transverse axis z vertical axis

Claims

[1] Seat (100, 1000), in particular vehicle seat, comprising at least the following - a seat support structure (130) comprising at least one fixed base element (140), a seat shell (102) and a backrest (104) which are adjustable relative to the base element (140), and - a tilting mechanism (200) designed to move the seat support structure (130) between an upright sitting position (150) and at least one horizontal bed position (152), characterized by , that - the tilting mechanism (200) comprises a first linkage mechanism (210) with which the seat shell (102) is coupled to the base element (140), and a second linkage mechanism (220) with which the backrest (104) is coupled to the base element (140), - wherein both linkage mechanisms (210, 220) are held in a decoupled state (202) relative to each other in the upright sitting position (150) and assume a coupled state (204) when the tilting mechanism (200) is actuated in order to transfer the seat support structure (130) into the horizontal bed position (152), - wherein the linkage mechanisms (210, 220) comprise coupling elements (310, 320) which are spaced apart from each other in the decoupled state (202) and engage with each other in the coupled state (204), - wherein the first linkage mechanism (210) comprises at least a first coupling element (310) which is movably guided in a guide element (146) which is arranged on the fixed base element (140). [2] Seat (100, 1000) according to claim 1, characterized by, that the linkage mechanisms (210, 220) are designed in the coupled state (204) to move the seat shell (102) and the backrest (104) simultaneously. [3] Seat (100, 1000) according to claim 1 or 2, characterized by , that the linkage mechanisms (210, 220) are configured in the coupled state (204) to raise the seat shell (102) about a first horizontal pivot axis and to tilt the backrest (104) about a second horizontal pivot axis, wherein the first horizontal pivot axis is different from the second horizontal pivot axis. [4] Seat (100, 1000) according to one of the preceding claims, characterized by , that the tilting mechanism (200) is designed such that the coupled state (204) of the linkage mechanisms (210, 220) can be produced by actuating the second linkage mechanism (220) relative to the base element (140). [5] Seat (100, 1000) according to one of the preceding claims, characterized by, that the second linkage mechanism (220) comprises at least a second coupling element (320) with a receiving section (322) which engages with the first coupling element (310) in the coupled state (204). [6] Seat (100, 1000) according to one of the preceding claims, characterized by , that the tilting mechanism (200) is designed to transfer the seat support structure (130) from one position to another by moving the first coupling element (310) along the guide element (146) by moving the second coupling element (320). [7] Seat (100, 1000) according to one of the preceding claims, characterized by, that the tilting mechanism (200) includes a free-running area (240) between the linkage mechanisms (210, 220) by which the backrest (104) can be tilted from the upright sitting position (150) into an inclined intermediate position (154) before the linkage mechanisms (210, 220) enter the coupled state (204) to transfer the seat support structure (130) into the horizontal bed position (152). [8] Seat (100, 1000) according to one of the preceding claims, characterized by , that the first linkage mechanism (210) comprises two fixed pivot joints (212, 214) between which a first number of relatively pivotable linkage links (216a to 216d) are arranged, wherein the fixed pivot joints (212, 214) couple the seat shell (102) to the base element (140). [9] Seat (100, 1000) according to one of the preceding claims, characterized by, that the second linkage mechanism (220) comprises a fixed pivot joint (222) that couples the backrest (104) to the base element (140), and a second number of pivotable linkage links (224a, 224b) that are pivotable about the fixed pivot joint (222).

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