Vehicle seat with a guide on a rear coupling element

Abstract

The invention relates to a vehicle seat (1A-1E) for a vehicle (2), comprising: a seat part (10), a backrest (11), a base (12), and a support mechanism (13A-13E) with a front coupling element and a rear coupling element, via which the seat part (10) and the backrest (11) are supported on the base (12), wherein the rear coupling element is closer to the backrest (11) than the front coupling element, and the seat part (10) and the backrest (11) can be moved from an upright seating position (AP) into a relaxation position (RP), which is inclined further downwards, by means of the support mechanism (13). The rear coupling element is equipped with a blocked guide (F) which can be released such that the seat part (10) and the backrest (11) can be moved from the relaxation position (RP) into a safety position (SP), which is upright relative to the base (12), in a guided manner by means of the guide (F).

Description

[0001] Vehicle seat with a guide on a rear coupling element

[0002] Description

[0003] The proposed solution concerns a vehicle seat and a vehicle.

[0004] Vehicle seats are typically adjustable, e.g., to provide a comfortable seating position for different seat users and to accommodate different space requirements. For example, a vehicle seat can be mounted in a vehicle in a longitudinally adjustable manner using a longitudinal adjustment device to enable various seating positions along the vehicle's longitudinal axis. A vehicle seat can be adjustable using a height adjustment device to adjust the seat height. In a vehicle seat, the inclination of a backrest relative to a seat part can be adjustable, to name just a few examples.

[0005] In a vehicle crash, significant forces can act on a vehicle seat and the passenger sitting on it. DE 10 2021 202 560 A1 describes a lever with a deformation section that can dissipate crash energy in the event of a crash and allows the passenger to be decelerated more gently. To provide passengers, and in autonomous vehicles also drivers, with a particularly comfortable seating position while driving, vehicle seats can be designed to convert into a relaxed position in which a seat section and backrest are tilted far back.

[0006] However, in this position, the restraint of the occupant's pelvis would exert significant forces on the spine in the event of a frontal collision. Depending on the specific design of the vehicle seat, this could result in an increased risk of injury to the occupant. Therefore, such seating positions are now regularly limited to a stationary vehicle and cannot be adjusted while the vehicle is moving.

[0007] The task is to provide an improved vehicle seat.

[0008] This object is achieved by an article having the features of claim 1.

[0009] According to this, a vehicle seat for a vehicle is specified, comprising a seat part, a backrest, a base and a support mechanism. The support mechanism has a front coupling element, e.g. in the form of a front swing arm, and a rear coupling element, e.g. in the form of a rear swing arm, via which the seat part and the backrest are supported on the base, wherein the rear coupling element (e.g. the rear swing arm) is arranged closer to the backrest than the front coupling element (e.g. the front swing arm). It is provided that the seat part and the backrest can be moved by means of the support mechanism from a more upright sitting position into a more rearwardly inclined relaxed position, wherein on the rear coupling element (e.g.on the rear swing arm) a blocked guide is provided which can be released in such a way that the seat part and the backrest can be moved from the relaxed position into a more upright safety position relative to the base, guided by the guide.

[0010] This allows the vehicle seat to be moved into a different position in which the forces acting in a vehicle crash can be better absorbed. This makes it possible to move the vehicle seat into a more upright position so that the forces acting via the seat belt can be distributed over a wider area. This can reduce the strain on the spine, which can significantly lower the risk of injury. This enables a safe and at the same time comfortable vehicle seat. It is also possible to reduce the forces acting on the support mechanism, thereby supporting a lightweight construction. The result is an improved vehicle seat. The described support mechanism can in particular be provided on a left side and a right side of the vehicle seat.

[0011] It can be provided that in the relaxed position a torso angle and / or an angle of a longitudinal axis of the backrest is / are more than 25° (in particular more than 30°, more than 40° or even more than 50°) to the vertical (and to the vehicle's vertical axis of the vehicle coordinate system) when the base is aligned according to an installed state in the horizontally positioned vehicle. In the upright sitting position, the torso angle and / or the angle of the longitudinal axis of the backrest can be less than 25°. The torso angle is measured, for example, using the standardized H-point measuring machine SAE J826 H-POINT MANIKIN in accordance with E / ECE / 324 and / or E / ECE / TRANS / 505 (e.g. Regulation No. 14, REV. 1 / ADD. 13 / REF, 1 , ANNEX 4).

[0012] A deformation section can be provided, which initially blocks the guide and, upon release, can be deformed in a predetermined manner such that the seat part and the backrest can be moved from the relaxed position to the safety position. Thus, the deformation section can be used to dissipate crash energy in a vehicle crash by elastically and / or plastically deforming the material of the deformation section.

[0013] The rear swing arm can be pivotally mounted to the seat section with a first bearing section and / or pivotally mounted to the base with a second bearing section. This allows for a simple and secure design. The bearing sections each have, for example, a bearing opening and / or a bolt.

[0014] For example, the deformation section is attached to or formed on the rear swing arm. The rear swing arm can have the guide, which is blocked in an initial position of the bearing sections by the deformation section, which can be deformed upon the application of a force to release a movement guided by the guide to increase the distance between the first bearing section and the second bearing section. Integrating the deformation section into the rear swing arm allows for a particularly small footprint. For example, one of the bearing sections is guided along the guide.

[0015] According to a further development, the deformation section is fastened to or formed on a base body of the rear swing arm, which base body forms the guide and one of the two bearing sections. In this case, it can be provided that the other of the two bearing sections is arranged in the guide. In a further embodiment, it is provided that the deformation section is fastened to the base. In this case, the guide can be provided on the base (e.g. fastened to or formed thereon), which guide is blocked in an initial position of the second bearing section by the deformation section, which can be deformed as a result of the application of force in order to release a movement of the second bearing section guided by the guide. This enables particularly secure assembly of the deformation section.

[0016] In a further embodiment, the deformation section is attached to the seat part. The guide can be provided on the seat part, which is blocked in an initial position of the first bearing section by the deformation section, which can be deformed upon application of a force to release a movement of the first bearing section guided by the guide. This allows for space-saving accommodation of the deformation section and the guide in the seat part.

[0017] The deformation section can be arranged or formed on a deformation element, e.g. in the form of a pivot bearing device, which forms the guide for the rear swing arm and which is fastened to the base or to the seat part.

[0018] The applied force causes a deformation of the deformation section if it exceeds a predefined threshold. The deformation section remains intact as long as the force acting on it is less than the predefined threshold. If the applied force exceeds the threshold, a (particularly plastic) deformation of the deformation section begins.

[0019] The vehicle seat may have a seat belt mounted on the backrest. The seat belt is attached, for example, to an upper end of the backrest. In a frontal collision, the belt forces acting on it trigger a deformation of the deformation section. This enables particularly reliable deformation of the deformation section and transfer of the vehicle seat to the safety position.

[0020] Furthermore, an airbag mounted on the seat part can be provided. This can be designed to be inflated when the seat part and the backrest are moved from the relaxed position to the safety position by means of the guide and / or when the deformation section is deformed. This allows the legs of the seat occupant to be raised. This can significantly reduce the risk of "submarining", in which a seat occupant would slip under the seat belt. Furthermore, the vehicle seat can comprise a seat pan part that is movable, e.g. pivotable, relative to the rest of the seat part, particularly in a front region of the seat part. This can be pivoted upwards in the event of a crash to reduce the risk of submarining. The movement can occur by triggering an energy storage device (e.g. a spring), by a motor, or by means of a pyrotechnic actuator.

[0021] The vehicle seat can further comprise a lock, by means of which the guide and / or a deformation of the deformation section can be locked. This allows for quick release and prevents unintentional activation, e.g., due to incorrect operation.

[0022] The lock can be opened, for example, by a triggering device with an electric actuator, by a triggering device that can be triggered by an applied acceleration, or by a triggering device with a pyrotechnic actuator. Furthermore, the lock can be provided to open when moved into the relaxed position and to always remain open in the relaxed position. If, for example, a collision detection system detects an impending or already occurring impact, the lock can be opened. This enables the lock to be opened quickly. Opening by acceleration enables a particularly simple design without the need for an electrical connection. Opening in the relaxed position also allows for a particularly simple design. A pyrotechnic actuator allows the lock to be opened particularly quickly.

[0023] The vehicle seat can further comprise a control system configured to detect an impending or already occurring vehicle crash and, in response, to adjust the vehicle seat. This allows the vehicle seat to be moved into a particularly safe position and supports the function of the deformation section.

[0024] For example, the support mechanism is designed as a height adjustment device for adjusting the height of the seat and backrest relative to the base. This allows the support mechanism to offer multiple uses, enabling simple, yet safe, and comfortable assembly.

[0025] According to one aspect, a vehicle is provided, comprising the vehicle seat according to any embodiment described herein. Regarding the advantages, reference is made to the above information. The concept underlying the invention will be explained in more detail below with reference to the exemplary embodiments illustrated in the figures. They show:

[0026] Fig. 1A a vehicle seat with a support mechanism for adjusting the

[0027] Vehicle seat in a relaxed position and a relatively more upright position, the vehicle seat being shown in the relaxed position;

[0028] Fig. 1 B shows the vehicle seat according to Fig. 1 A in a safety position;

[0029] Fig. 2 further details of the vehicle seat according to Fig. 1A and 1B;

[0030] Fig. 3 is a view of a rear swing arm of the support mechanism of the

[0031] Vehicle seat according to Fig. 1A and 1B with a deformation section;

[0032] Fig. 4 is a partially cutaway view of the rear swing according to

[0033] Fig. 3;

[0034] Fig. 5 a pivot bearing device for the support mechanism of the

[0035] Vehicle seat according to Fig. 1 with a deformation section;

[0036] Fig. 6 a rear swing arm for the support mechanism of the vehicle seat according to Fig. 1;

[0037] Fig. 7A and 7B the vehicle seat according to Fig. 1A and 1B in the relaxed position and in the

[0038] security position;

[0039] Fig. 8A and 8B show another vehicle seat in a relaxed position and in a

[0040] security position;

[0041] Fig. 9A and 9B show another vehicle seat in a relaxed position and in a

[0042] security position;

[0043] Fig. 10 shows another vehicle seat in a safety position; and

[0044] Fig. 11A and 11B show another vehicle seat in a relaxed position and in a

[0045] Safety position. Fig. 1 shows a vehicle seat 1A with a seat part 10 and a backrest 11. The backrest 11 is pivotally mounted on the seat part 10 about a pivot axis by means of an arrangement of fittings 18.

[0046] The vehicle seat 1A further comprises a base 12 and a support mechanism 13A. In the present example, the base 12 comprises a longitudinal adjustment device with two floor rails 122, of which the left floor rail 122, as seen from the perspective of a seat occupant 3 sitting on the vehicle seat 1A, can be seen in the side view according to Fig. 1A. The corresponding right floor rail 122 is designed analogously (e.g., identically or as a mirror image) to the left floor rail 122. This also applies to the other components of the base 12 and the support mechanism 13A described below.

[0047] The floor rails 122 can be mounted on a vehicle floor 20 of a vehicle 2 and, in the mounted state, are fastened to the vehicle floor 20 as shown in Fig. 1A. A respective seat rail 121 engages each of the floor rails 122 in a longitudinally displaceable manner. The support mechanism 13A connects the seat part 10 to the seat rail 121. In this way, the vehicle seat 1A can be adjusted to various positions along the longitudinal extent of the floor rails 122. It should already be noted at this point that the vehicle seat 1A could also be designed without a longitudinal adjustment device. For example, the support mechanism could be mounted on a bracket fixed to the vehicle floor 20, or the vehicle floor 20 itself could serve as a base and, for example, have bearing points for mounting the support mechanism 13.

[0048] The seat part 10 and the backrest 11 are supported on the base 12 via the support mechanism 13A in a rear region adjacent to the backrest 11 and in a front region further away from the backrest 11. The support mechanism 13A has (on each side) a front coupling element in the front region, which in the present example is designed as a front rocker 130A, and a rear coupling element in the rear region, which in the example shown is designed as a rear rocker 131A, via which the seat part 10 and here also the backrest 11 are supported on the base 12. The rear rocker 131A is therefore arranged closer to the backrest 11 than the front rocker 130A. One or both of the coupling elements could alternatively be designed as a rocker, for example, as a guide rail or the like instead of as a rocker.

[0049] The seat part 10 and the backrest 11, which is pivotally mounted on the seat part 10, are supported on the base 12 by means of the support mechanism 13A. The support mechanism 13A forms a height adjustment device for adjusting the seat height of the seat part 10 relative to the base 12. By adjusting the front and / or rear rocker arms 130A, 131A relative to the base 12, the seat height can be adjusted relative to the base 12 (along the vertical Z).

[0050] Fig. 1A shows the vehicle seat 1A in a relaxed position RP (or position), in which the seat occupant 3 can, for example, rest or sleep in the vehicle seat. An upright position (or position) AP is also illustrated in Fig. 1A with dashed lines. In the upright position AP, the seat occupant 3 can, for example, drive the vehicle 2 with the vehicle seat 1A as a driver. In the relaxed position RP, both the seat part 10 and the backrest 11 are inclined further backwards than in the upright position AP (from the perspective of the seat occupant 3 sitting on the vehicle seat 1 and looking straight ahead), in this case so far that a torso angle α and an angle of a longitudinal axis L of the backrest 11 are more than 25° to the vertical Z when the base 12 is aligned according to an installed state in the vehicle 2 placed on a horizontal surface.The torso angle a corresponds, for example, to the angle of a straight torso line LT from the hip joint to the shoulders of a seat occupant 3 sitting in the vehicle seat 1A to the vertical Z. The longitudinal axis L of the backrest 11 extends, for example, from the pivot axis of the backrest 11 on the seat part 10 to the upper end edge of the backrest 11.

[0051] The torso angle is measured, for example, using the standardized H-point measuring machine SAE J826 H-POINT MANIKIN according to E / ECE / 324 and / or E / ECE / TRANS / 505 (e.g. Regulation No. 14, REV. 1 / ADD. 13 / REF, 1 , ANNEX 4).

[0052] Furthermore, Fig. 1A shows a seat pan angle ß, which describes, for example, the angle between a seat pan line LS (or the thigh 31 resting on the seat part 10) and the horizontal X. The seat pan line LS corresponds, for example, to a straight line from the hip joint to the knees of the seat occupant 3. A crash test dummy according to the SAE J 826 standard of the Society of Automotive Engineers and / or the VDA 304 recommendation serves as a benchmark.

[0053] The seat part 10 and the backrest 11 can be moved by means of the support mechanism 13 from an upright sitting position AP into a further backward inclined relaxation position RP and vice versa.

[0054] Since in the relaxed position RP the torso 30 of the seat occupant 3 is inclined relatively far backwards, e.g. at an angle of more than 35 degrees to the vertical Z or even at an angle of more than 45 degrees to the vertical Z, very high forces would be introduced into the spine of the seat occupant 3 in the event of a frontal impact.

[0055] In the present example, a belt exit point of a safety belt for seat occupant 3 is located at an upper end of the backrest 11 (facing away from the seat part 10). In the event of a frontal crash, the weight of seat occupant 3 pulls on the backrest 11 via the safety belt and exerts a force Fa on the backrest 11. Furthermore, a force Fb acts on the seat part 10 in the area of ​​the belt buckle. The forces F1 and Fb are directed forward and upward, respectively.

[0056] Fig. 1B shows the vehicle seat 1A in a safety position SP, which is more upright than the relaxed position RP. The torso angle α2 (and also the angle of the longitudinal axis L of the backrest 11 to the vertical axis Z) is smaller than in the relaxed position RP. The seat pan angle β2 is also smaller than in the relaxed position RP.

[0057] The seat part 10 and the backrest 11 are pivoted forward and upward, as illustrated by an arrow in Fig. 1 B. Thus, the acting forces can be transmitted more gently via the safety belt into the torso 30 of the seat occupant 3.

[0058] In order to enable the seat part 10 and the backrest 11 to be transferred from the relaxed position RP into the safety position SP, the vehicle seat 1A comprises, in the region of the rear rockers 131A, a guide F which will be described in more detail below and which is initially blocked, in this case by a deformation section 136 which is deformable as a result of the application of a force, wherein the blocking can be released (here, for example, by the deformation of the deformation section) in order to release the movement guided by the guide into the safety position SP.

[0059] Before possible designs and arrangements of the respective deformation section are discussed in detail below, a possible design of the support mechanism 13A and further details of the vehicle seat 1A will now be explained with reference to Fig. 2.

[0060] The rear swing arm 131A is pivotally mounted on the base 12 about a pivot axis S1, here on the seat rail of the base 12. Furthermore, the rear swing arm 131A is pivotally connected to the seat part 10 about a pivot axis S2. The front swing arm 130A is pivotally mounted on the base 12 about a pivot axis S3, here on the seat rail of the base 12. Furthermore, the front swing arm 130A is pivotally connected to the seat part 10 about a pivot axis S5.

[0061] According to Fig. 2, the front swing arm 130A comprises a first arm 132 and a second arm 133. The first arm 132 is pivotally mounted on the base 12, the second arm 133 on the seat part 10. The first and second arms 132, 133 are pivotally connected to one another via a further pivot axis S4.

[0062] A motor unit 135 (e.g., with an electric motor and a gear) is configured to adjust the seat part 10 and the backrest 11 between the upright position AP and the relaxed position. The motor unit 135 is pivotally mounted on the base 12 and drives, for example, a spindle pivotally mounted on the seat part 10. Alternatively, the motor unit 135 can act on the rear rocker arm 131A.

[0063] A further motor unit 134 (e.g., with an electric motor and a gear) is configured to adjust the inclination of the seat part 10 and the backrest 11 relative to the base. For this purpose, the motor unit 134 acts on the first arm 132 of the front swing arm 130A.

[0064] Fig. 2 also shows the aforementioned safety belt 19. A retractor mechanism 191 is mounted at the upper end of the backrest 11. Alternatively, the retractor mechanism 191 can also be mounted at a different location, and the safety belt 19 is redirected, for example, at a deflection bracket at the upper end of the backrest 11. An exit point 190 for the safety belt 19 is provided at the upper end of the backrest 11, facing away from the seat part 10. Pulling on the safety belt 19 thus exerts a force on the upper end of the backrest 11.

[0065] Furthermore, a belt buckle 192 is attached to the seat part 10 (alternatively, for example, to the base 12).

[0066] As can be seen in Fig. 2, the vehicle seat 1A further has an airbag 15. The airbag 15 is in the form of an inflatable bag which is mounted in a folded state. The airbag 15 is here mounted on the seat part 10, specifically in the example shown on a front region of the seat part 10. The airbag 15 is arranged beneath a cushion 101 of the seat part 10. The airbag 15 is arranged beneath the thighs 31 of the seat occupant 3 when the occupant is sitting on the vehicle seat 1A as intended. The airbag 15 is connected to a gas generator 150, e.g. via an air line, and can be inflated by means of the gas generator 150. The gas generator 150 can be ignited by an ignition signal from a control system 16. The control system 16 detects, for example, an impending or incipient frontal crash. For this purpose, it can be provided that the control system 16 receives a corresponding signal from an external device.Alternatively, it can be provided that the control system 16 measures, for example, an acceleration and outputs the ignition signal when a predetermined threshold value is exceeded. The control system 16 can be configured to cause the airbag 15 to inflate when the deformation section is deformed. For this purpose, it can be detected, for example, that the deformation section is deformed, or an event can be detected that (also) leads to the deformation of the deformation section.

[0067] When the gas generator 150 is ignited, it releases a gas, e.g., by burning a fuel and thus generating gas or by opening a valve. The released gas then inflates the airbag 15, which can also be referred to as a gas bag.

[0068] After the gas generator 150 is ignited, the inflated airbag 15 raises the thighs 31 of the seat occupant 3 relative to their upper body. This further reduces the risk of submarining.

[0069] The rear rocker arm 131A, shown separately in Fig. 3, has a deformation section 136 which can be deformed in a predetermined manner such that the seat part 10 and the backrest 11 can be moved from the relaxed position RP into the more upright safety position SP relative to the base 12 compared to the relaxed position RP. The deformation section 136 is fastened to a base body 137 of the rear rocker arm 131A. The base body 137 is elongated. The deformation section 136 has weakenings which, above a predetermined force, lead to failure of the deformation section 136. The first bearing section L1 is formed on the base body 137. The second bearing section L2 is arranged within the guide F. The guide F is concealed by the deformation section 136 in the initial state. The deformation section 136 is elongated.In the present case, the deformation section 136 has weakenings which can be in the form of openings or indentations. In this way, the deformation section 136 allows particularly precise and uniform deformation. The deformation section 136 can have a smaller material thickness and / or a material with a lower strength than the base body 133. Furthermore, the rear rocker 131A forms a first bearing section L1 and a second bearing section L2. One of the two bearing sections L1, L2 forms the pivot axis S1 with the base 12 in the assembled state and the other of the two bearing sections L1, L2 forms the pivot axis S2 with the seat part 10 in the assembled state (e.g. in each case with a bolt arranged in the corresponding bearing section L1, L2). In the present case, each of the two bearing sections L1, L2 is designed in the form of a bearing opening.

[0070] The rear swing arm 131A further has (on the base body 137) a guide F which, in an initial position of the bearing sections L1, L2, is blocked by the deformation section 132A. The deformation section 136 is deformable as a result of a force acting on the bearing sections L1, L2 in order to release a movement guided by the guide F for changing, in this case an increase, a distance D1, D2 (cf. Figs. 7A and 7B) between the first bearing section L1 and the second bearing section L2. In the initial position, the bearing sections L1, L2 are arranged at a first, smaller distance D1 from one another. As the second bearing section L2 is guided along the guide F in a deforming manner along the deformation section 136, the distance increases until the second bearing section L2 reaches an end position EL in which the bearing sections L1, L2 have a larger, second distance D2 from one another. The guide F is designed as a slot in the base body 137.The guide F is straight in this case, but could alternatively be curved.

[0071] While the seat part 10 and the backrest 11 can be moved together into the relaxed position RP by means of the support mechanism 13 when the bearing sections L1, L2 are arranged in the starting position (at the smaller first distance D1 from one another), the seat part 10 and the backrest 11 can be moved from the relaxed position RP by increasing the distance D1, D2 of the first bearing section L1 to the second bearing section L2 into a more upright safety position SP relative to the base 12 compared to the relaxed position RP.

[0072] The rear swing arm 131A here comprises a lock 14. As long as the force acting on the rear swing arm 131A is less than a minimum value, the rear swing arm 131A is not deformed. If the minimum value is exceeded, the deformation section 136 deforms, so that the first bearing section L1 can be moved in the guide F. The lock 14 can be used to lock the guide F independently of the deformation section 136. When the lock 14 is closed, the deformation section 136 does not deform even if the acting force (in the direction of the deformation section 136) exceeds the minimum value. The minimum value serves as the trigger threshold and can be set above a typical misuse load.

[0073] Fig. 4 shows the rear rocker arm 131A in a partially cutaway view, with the lock 14 shown in an open state. It can be seen that the lock 14 includes a claw 140 (alternatively, at least one latch) pivotally mounted on the rear rocker arm 131A. In the locked state, the claw 140 engages the deformation section 136, thus preventing its deformation.

[0074] A triggering device 17 is configured to unlock the lock 14. For this purpose, the triggering device 17 comprises an electrical (or pyrotechnic) actuator 170, the actuation of which disengages the claw 140 from the deformation section 132A. The triggering device 17 is triggered by the control system 16. The control system 16 can detect an impending or actual crash and open the lock 14 in response. The control system 16 optionally detects a position of the vehicle seat 1 and opens or closes the lock 14 depending thereon. In the present case, the control system 16 opens the lock 14 when the vehicle seat 1A is arranged in the relaxed position RP and closes it in other positions. The control system 16 can be configured to open or close the lock 14 depending on an inclination of the seat part 10 and / or the backrest 11 (e.g., relative to the base).It should be noted that the lock 14 can also be opened by a triggering device that can be triggered by an applied acceleration. For example, the claw 140 could simply be pulled out of engagement with the deformation section 132A as a result of the acceleration in the event of a frontal crash.

[0075] Optionally, the deformation section 136 has increasing material thickness, strength, and / or stability along its length. This allows for people of varying weights to be safely intercepted. Such a progression can be provided alternatively or additionally before the end position EL to prevent a hard impact.

[0076] Alternatively, the deformation section could be formed by opposite edges of the guide F. By exceeding the minimum force, the bolt of the second bearing section L2 can bend the edges and thus enable displacement in the guide F.

[0077] Fig. 5 shows a pivot bearing device with a base body having two fastening points B1, B2 and forming a guide F. A deformation section 136 is fastened to the guide F. The guide F is arranged between the fastening points B1, B2. A bearing section L3 is arranged in the guide.

[0078] Fig. 6 further shows an alternatively designed rear rocker arm 131B. This rear rocker arm 131B has two bearing sections L1, L2 formed on a base body (here again in the form of receptacles for one bolt each). The rear rocker arm 131B does not have a deformation section.

[0079] Fig. 7A shows the vehicle seat 1A in the relaxed position RP, with the bearing sections L1, L2 (see Figs. 3 and 4) arranged at the first distance D1 from each other. As a result of the force applied in the event of a crash, the deformation section 136 is deformed, and the bearing sections L1, L2 increase their distance to the second distance D2. This brings the vehicle seat 1A into the safety position SP, as illustrated in Fig. 7B.

[0080] The vehicle seat 1B according to Fig. 8A and 8B is constructed similarly to the vehicle seat 1A according to Fig. 7A and 7B, but the vehicle seat 1B comprises a support mechanism 13B with the (rigid) rear rocker arm 131B according to Fig. 6. The deformation section 136 of the pivot bearing device 139 is arranged on this rocker arm. For this purpose, the pivot bearing device 139 is fastened to a holder 120A of the base 12 (with the two fastening points B1, B2). One of the bearing sections L1, L2 of the rear rocker arm 131B is coupled (e.g. via a bolt) to the bearing section L3 in the guide F of the pivot bearing device 139. The pivot bearing device 139 is arranged such that the bearing section L3 is displaced obliquely forward and upward when the deformation section 136 is deformed. Fig. 8A shows the relaxation position, Fig. 8B the safety position SP.

[0081] The vehicle seat 1C according to Figs. 9A and 9B is constructed similarly to the vehicle seat 1B according to Figs. 8A and 8B. However, in the support mechanism 13C of the vehicle seat 1C, the deformation section 139 is arranged at the end of the rear rocker arm 131B, which is pivotally connected to the seat part 10. For this purpose, the pivot bearing device 139 is attached to the seat part 10. Fig. 9A shows the relaxed position, Fig. 9B the safety position SP. The other end of the rear rocker arm 131B is pivotally mounted on a bracket 120B of the base 12.

[0082] The vehicle seat 1D according to Fig. 10 is constructed in the same way as the vehicle seat 1C according to Figs. 9A and 9B, except that the front rocker arm 130A of the support mechanism 13D is constructed in one piece. Here, the front and rear rockers 130B, 131B form a simple four-bar linkage with the seat part 10 and the base 12.

[0083] The vehicle seat 1E according to Figs. 11A and 11B, with a support mechanism 13E, is again constructed similarly to the vehicle seat 1A according to Figs. 7A and 7B. However, the seat part 10 of the vehicle seat 1E also includes a seat pan part 100, which folds up in the event of a crash to prevent submarining. For this purpose, an energy storage device, e.g., an electrical or pyrotechnic actuator or a spring-loaded device, is triggered, e.g., by the control system 16. Optionally, the movement of the seat pan 100 is kinematically coupled to the deformation of the deformation section 136.

[0084] Thus, the vehicle seat 1A-1 E and thus the seat occupant 3 can be raised and brought into a crash-compatible position in a simpler and safer manner using the belt forces acting in the frontal crash.

[0085] Alternatively or additionally, a deformation section can also be provided in one of the motor units 134, 135 or a component driven thereby. In the event of a crash (imminent or already occurred), the control system 16 can also additionally control one (or more) of the motor units 134, 135 and move the vehicle seat 1A-1E into a more advantageous position, in particular by means of a fast transmission and / or a brushless drive (e.g., a BLDC motor). Such an adjustment can be effected by means of the support mechanism or by means of kinematics independent of it.

[0086] Alternatively or in addition to a change in the length of the rear swing arm 131 A, a change in the angle of the swing arm can also be provided.

[0087] List of reference symbols

[0088] 1A-1E Vehicle seat 10 Seat part 100 Seat pan part 101 Upholstery 11 Backrest 12 Base

[0089] 120A, 120B Bracket 121 Seat rail 122 Floor rail 13A-13E Support mechanism 130A, 130B Front swing arm 131A-131B Rear swing arm 132 First arm 133 Second arm 134, 135 Motor unit 136 Deformation section 137 Main body 139 Pivot bearing device 14 Lock 140 Claw 15 Airbag 150 Gas generator 16 Control system 17 Triggering device 170 Actuator 172 Lock 18 Fitting 19 Safety belt 190 Belt exit point 191 Retractor mechanism 192 Belt buckle 2 Vehicle 20 Vehicle floor 3 Seat occupant 30 Torso 31 Thigh a, a2 Torso angle ß, ß2 Seat pan angle

[0090] AP upright position B1, B2 attachment point

[0091] D1 , D2 first, second distance

[0092] EL end position

[0093] F Leadership

[0094] Fa, Fb Force L Longitudinal axis

[0095] LS seat pan line

[0096] LT torso line

[0097] L1, L2, L3 bearing section

[0098] RP Relaxation position SP Safety position

[0099] S1-S5 swivel axis

[0100] X Horizontal

[0101] Z Vertical

Claims

Claims 1. A vehicle seat (1A-1E) for a vehicle (2), comprising: a seat part (10), a backrest (11), a base (12), and a support mechanism (13A-13E) with a front coupling element, in particular a front rocker (130A, 130B), and a rear coupling element, in particular a rear rocker (131A, 131B), via which the seat part (10) and the backrest (11) are supported on the base (12), wherein the rear coupling element is arranged closer to the backrest (11) than the front coupling element, characterized in that the seat part (10) and the backrest (11) can be moved by means of the support mechanism (13) from an upright sitting position (AP) into a further rearwardly inclined relaxed position (RP), wherein a guide (F) is provided on the rear coupling element, which guide can be released in such a way thatthat the seat part (10) and the backrest (11) are guided by the guide (F) and can be moved from the relaxed position (RP) into a more upright safety position (SP) relative to the base (12).

2. Vehicle seat (1A-1E) according to claim 1, characterized in that in the relaxed position (RP) a torso angle (a) and / or an angle of a longitudinal axis (L) of the backrest (11) is / are more than 25° to the vertical (Z) when the base (12) is aligned according to an installed state in the horizontally placed vehicle (2).

3. Vehicle seat (1A-1E) according to claim 1 or 2, characterized in that a deformation section (136) is provided which can be deformed to release the guide (F) in such a way that the seat part (10) and the backrest (11) can be moved from the relaxed position (RP) into the safety position (SP).

4. Vehicle seat (1A-1E) according to one of the preceding claims, characterized in that the rear rocker (131A, 131B) is provided with a first Bearing section (L1) is pivotally mounted on the seat part (10) and is pivotally mounted on the base (12) with a second bearing section (L2).

5. Vehicle seat (1 A, 1 E) according to claim 3 and claim 4, characterized in that the deformation section (136) is fastened or formed on the rear rocker (131 B), the rear rocker (131 B) having the guide (F) which is blocked in an initial position of the bearing sections (L1, L2) by the deformation section (136) which is deformable as a result of a force in order to release a movement guided by the guide (F) to increase a distance (D1, D2) of the first bearing section (L1) to the second bearing section (L2).

6. Vehicle seat (1A, 1E) according to claim 5, characterized in that the deformation section (136) is fastened to or formed on a base body (137) of the rear rocker (131B), which forms the guide (F) and one of the two bearing sections (L1, L2), the other of the two bearing sections (L1, L2) being arranged in the guide (F).

7. Vehicle seat (1 B) according to claim 3 and claim 4, characterized in that the deformation section (136) is fastened to the base (12), the guide (F) being provided on the base (12), which guide (F) is blocked in an initial position of the second bearing section (L2) by the deformation section (136), which is deformable as a result of a force in order to release a movement of the second bearing section (L2) guided by the guide (F).

8. Vehicle seat (1 C, 1 D) according to claim 3 and claim 4, characterized in that the deformation section (136) is fastened to the seat part (10), the guide (F) being provided on the seat part (10), which guide (F) is blocked in an initial position of the first bearing section (L1) by the deformation section (136), which is deformable as a result of the action of a force in order to release a movement of the first bearing section (L1) guided by the guide (F).

9. Vehicle seat (1A-1E) according to claim 7 or 8, characterized in that the deformation section (136) is arranged or formed on a pivot bearing device (139) which forms the guide (F) for the rear swing arm (131 A, 131 B) and which is fastened to the base (12) or to the seat part (12).

10. Vehicle seat (1A-1E) according to one of claims 5 to 9, characterized in that the force action causes a deformation of the deformation section (136) if it exceeds a predetermined threshold value.

11. Vehicle seat (1A-1E) according to one of the preceding claims, characterized by a safety belt (19) mounted on the backrest (11).

12. Vehicle seat (1A) according to one of the preceding claims, characterized by an airbag (15) mounted on the seat part (10) which is designed to be inflated when the seat part (10) and the backrest (11) are moved from the relaxed position (RP) to the safety position (SP) guided by the guide (F).

13. Vehicle seat (1 E) according to one of the preceding claims, characterized by a seat pan part (100) which is movable, in particular pivotable, relative to the remaining seat part (10).

14. Vehicle seat (1A-1E) according to one of the preceding claims, characterized by a lock (14) by means of which the guide (F) can be locked.

15. Vehicle seat (1) according to claim 14, characterized in that the lock (14) can be opened by a triggering device (17) with an electric actuator (170), by a triggering device that can be triggered by means of an acting acceleration or a triggering device with a pyrotechnic actuator or that the lock (14) opens in the relaxed position (RP).

16. Vehicle seat (1A-1E) according to one of the preceding claims, characterized by a control system (16) which is designed to detect an impending or already occurred vehicle crash and to effect an adjustment of the vehicle seat (1A-1E) in response thereto.

17. Vehicle seat (1A-1E) according to one of the preceding claims, characterized in that the support mechanism (13A-13E) is designed in the form of a height adjustment device for adjusting the seat height of the seat part (10) and the backrest (11) relative to the base (12).

18. Vehicle (2) comprising the vehicle seat (1A-1E) according to one of the preceding claims.

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