Vehicle seat and assembly process

Abstract

Vehicle seat (1), comprising: - a seat base (2), - a seat part (3) mounted on the seat base (2) and adjustable relative to the seat base (2), - a backrest (4) pivotably mounted on the seat base (2) between an upright use position (4A) and a non-use position (4B) pivoted towards the seat part (3), - a locking lever (5) pivotably mounted on the seat base (2) between a locking position (5A) and an unlocking position (5B) and pre-tensioned in the direction of the locking position (5A), wherein - the locking lever (5) can be deflected from the locking position (5A) to the unlocking position (5B) by pivoting the backrest (4) from the non-use position (4B) to the use position (4A), - the locking lever (5) is in its locking position (5A) in the use position (4A) of the backrest (4) in order to lock the backrest (4) against pivoting from the use position (4A) to the non-use position (4B), and - the locking lever (5) can be deflected from the locking position (5A) into the unlocking position (5B) against the pretension in order to release the locking of the backrest (4) in the use position (4A) by means of an unlocking ramp (52) coupled to the seat part (3). The proposed solution also concerns an assembly method for a vehicle seat.

Description

[0001] The proposed solution relates to a vehicle seat with a backrest which can be pivoted between an upright use position and a non-use position pivoted towards a seat part, as well as to a method for assembling such a vehicle seat.

[0002] Such vehicle seats and assembly processes are generally known from the field of vehicle manufacturing.

[0003] In this case, pivoting the backrest into the non-use position serves primarily to reduce the space occupied by the vehicle seat installed in a vehicle. In contrast, pivoting the backrest into the use position serves primarily to provide a seat and backrest for a vehicle seat occupant.

[0004] As a result of the pivoting mounting of the backrest on the seat base, the backrest can be pivoted between the use and non-use positions by applying an adjustment force. This adjustment force can be initiated not only by an intentional action of a vehicle seat occupant, but also by unintentional actions. Furthermore, forces acting as an adjustment force can also be caused by a shifting load, particularly in the event of an accident.

[0005] For both user comfort and safety, unintentional pivoting, especially from the in-use position to the non-use position, should be preventable. Furthermore, for efficient installation, it is important that any solution to prevent unintentional pivoting does not disproportionately increase the installation effort of the vehicle seat.

[0006] The object is therefore to provide an improved vehicle seat with a pivoting backrest and an improved assembly method for a vehicle seat with a pivoting backrest.

[0007] This object is achieved by a vehicle seat having the features of claim 1 and by an assembly method having the features of claim 13.

[0008] Accordingly, the proposed vehicle seat must have at least: - a seat base, - a seat part mounted on the seat base and adjustable relative to the seat base, - a backrest pivoted on the seat base between an upright use position and a non-use position pivoted towards the seat part, - a locking lever pivotably mounted on the seat base between a locking position and an unlocking position and pre-tensioned in the direction of the locking position, wherein - the locking lever can be moved from the locked position to the unlocked position by pivoting the backrest from the non-use position to the use position, - the locking lever is in its locked position in the use position of the backrest to prevent the backrest from pivoting from the use position to the non-use position, and - the locking lever can be deflected from the locking position to the unlocking position against the pretension in order to release the backrest from being locked in the position of use by means of a release ramp coupled to the seat part.

[0009] The proposed vehicle seat thus comprises a pivoting backrest which, when in use, is locked in the locked position by the locking lever against adjustment towards the non-use position. When the backrest is adjusted from the non-use position to the use position, the locking lever is deflected by pivoting the backrest from the locked position to the unlocked position. To pivot the backrest from the non-use position to the use position, no further action is required by a vehicle seat user other than introducing an adjusting force into the backrest. In particular, the locking lever does not have to be adjusted separately. By pretensioning the locking lever towards the locked position, the locking lever is moved into the locked position as soon as the backrest reaches the use position.In the locked position, the locking lever prevents the backrest from pivoting from the in-use position to the non-use position. Forces applied to the backrest are transferred to the seat base via the locking lever and the backrest bearings. This prevents unintentional adjustment in the event of an accident.

[0010] By applying a preload force to the locking lever, it is also secured against unintentional pivoting from the locked position to the unlocked position. This allows the locking lever to be securely held in the locked position even during vibrations or in the event of a crash. This can increase safety for the vehicle seat occupant.

[0011] When the seat is adjusted, the unlocking ramp coupled to the seat part can apply an adjusting force to the locking lever, deflecting the locking lever from the locked position to the unlocked position against the preload. Thus, the vehicle seat user can release the backrest lock by adjusting the seat part. This can increase the comfort of use of the proposed vehicle seat.

[0012] The pivotable mounting of the backrest on the seat base can define a backrest pivot axis. The backrest can be pivotally mounted on the seat base in such a way that the adjustment range of the backrest is limited. For example, the backrest can rest against the seat base in the use position and / or the non-use position in such a way that pivoting from the non-use position toward the use position beyond the use position is blocked. Likewise, pivoting of the backrest from the use position toward the non-use position beyond the non-use position can be blocked.

[0013] To generate the preload, the locking lever can be equipped with a spring element. Such a spring element can be an elastic element connected to the locking lever and the seat base, which applies a preload force to the locking lever, so that deflection of the locking lever from the locked position is only possible against the preload force.

[0014] In a further embodiment of the vehicle seat according to the proposed solution, the unlocking ramp can be mounted on the seat base so that it can be displaced relative to the locking lever. This enables efficient unlocking of the backrest.

[0015] The unlocking ramp can be configured to be displaced relative to the locking lever during an adjustment movement of the seat part. In particular, the unlocking ramp can be configured to also be displaced toward the front of the vehicle seat when the seat part is displaced toward the front of the vehicle seat, and vice versa.

[0016] For example, the unlocking ramp can be configured to rest against the locking lever during an adjustment movement of the seat part and to introduce an adjustment force into the locking lever so that it is deflected from the locking position into the unlocking position against the preload.

[0017] In a further embodiment of the proposed solution, the unlocking ramp can be configured to displace a driver of the locking lever through the adjustment movement of the seat part, thereby deflecting the locking lever against the preload. This can further improve the unlocking mechanism.

[0018] For example, when the control element is adjusted, the release ramp can be brought into contact with the driver of the locking lever and move the driver. Moving the driver can cause the locking lever to deflect against the preload. Thus, the release ramp can be configured to interact with the driver of the locking lever when the seat part is adjusted.

[0019] In one conceivable embodiment, the driver of the locking lever can be designed in the form of a substantially cylindrical pin. This can reduce manufacturing costs and improve controlled interaction with the unlocking ramp.

[0020] By way of example, the unlocking ramp can have a support section which is configured to be supported on the driver of the locking lever when the unlocking ramp is displaced in such a way that a deflection force can be introduced into the locking lever by the displacement.

[0021] As a further example, the unlocking ramp can be configured to first deflect the locking lever from the locked position to the unlocked position during an adjustment movement of the seat part toward the rear of the vehicle seat and then slide along the locking lever. During the sliding movement, a return adjustment of the locking lever from the unlocked position to the locked position can be blocked by the unlocking ramp.

[0022] In one conceivable embodiment, the unlocking ramp can have a sliding section which, when the unlocking ramp is moved relative to the locking lever in contact with the locking lever, slides past the latter and thereby blocks the locking lever from pivoting into the locking position.

[0023] In one conceivable sequence, by adjusting the seat part towards the rear of the vehicle seat, the support section of the release ramp can first be brought into contact with the driver of the locking lever. When the seat part is adjusted further towards the rear of the vehicle seat, a deflection force can be introduced into the driver via the release ramp, whereby the locking lever is adjusted from the locked position to the unlocked position. As soon as the locking lever is deflected into the unlocked position, the release ramp and its guide section can guide along the driver of the locking lever as the seat part is further adjusted. The release ramp can block the locking lever from being adjusted back to the locked position. This can enable unhindered adjustment of the backrest.As soon as the sliding section is adjusted relative to the locking lever in such a way that the sliding section no longer rests against the locking lever, the locking lever can automatically pivot into the locking position due to the preload.

[0024] In a further embodiment of the solution according to the invention, the seat part can have a sliding element and the seat base can have a rail and the sliding element can be slidably mounted on the rail.

[0025] The sliding element can be translationally displaceable on the rail relative to the seat part. In particular, the sliding element can be translationally displaceable on the rail relative to the seat part by adjusting the seat part from the non-use position to the use position.

[0026] Adjusting the release ramp relative to the seat part can cause the locking lever to pivot between the locked position and the unlocked position. Thus, by adjusting the seat part, the locking lever can be pivoted from the locked position to the unlocked position of the locking lever against the preload.

[0027] In an alternative or additional embodiment, in order to connect the unlocking ramp to the sliding element, the unlocking ramp and the sliding element can each have an opening through which a fastening part can extend.

[0028] In principle, the release ramp can be detachably connected to the sliding element. This allows for adjustment of the mounting position. For example, a detachable connection can be implemented with a screw.

[0029] In a further embodiment, to define a plurality of possible mounting positions, at least one of the openings in the unlocking ramp or the sliding element can be an elongated hole. The at least one elongated hole can have an extension in at least one direction that is larger than a diameter of the fastening part.

[0030] The operative connection between the release ramp and the locking lever can be adjusted by selecting the mounting position. In particular, the section of the backrest intended for locking the backrest's pivoting motion can be fixed without play by selecting the mounting position.

[0031] In a further embodiment of the solution according to the invention, the release ramp and / or the sliding element can have at least one anti-rotation device to prevent the release ramp from rotating relative to the fastening part. This can simplify the installation of the vehicle seat.

[0032] For example, an anti-rotation device can be formed with a projection on the unlocking ramp and / or the sliding element, wherein the projection engages in the opening of the other of the unlocking ramp and the sliding element. In a further embodiment, the at least one anti-rotation device can also engage in a further recess in the other of the unlocking ramp and the sliding element.

[0033] In a further embodiment of the vehicle seat according to the proposed solution, the seat base can have a guide for guiding the backrest when pivoting between the use position and the non-use position.

[0034] By guiding the backrest in a guide during the pivoting movement, the backrest's degrees of freedom of movement can be restricted. This stiffens the system, particularly against forces directed in a different direction than the intended adjustment force. This can, for example, increase the deformation stability of the vehicle seat in the event of an accident and thus improve the safety of the vehicle seat occupant.

[0035] In an alternative or additional embodiment of the proposed vehicle seat, a guide element can be arranged on the backrest, which can be guided along the guide when pivoting the backrest from the use position to the non-use position. For example, such a guide can be designed with a guide slot.

[0036] By pivoting the backrest about the backrest pivot axis, the guide element can be pivoted along a trajectory curve. In one embodiment of the proposed solution, the guide slot can correspond to the trajectory of the guide element, which the guide element describes when the backrest is pivoted between the use position and the non-use position.

[0037] The guide element of the backrest can also, for example, rest against an edge of the guide slot. Such an edge can run parallel to the trajectory of the guide element. A backrest subjected to forces can thus be configured to transmit at least some of the forces into the seat base via the guide element resting against the edge of the guide slot.

[0038] In a further embodiment of the proposed solution, the guide element for limiting an adjustment path of the backrest can rest against a first end stop of the seat base in the use position and against a second end stop of the seat base in the non-use position.

[0039] Both the first end stop and the second end stop can be arranged orthogonally with respect to the trajectory of the guide element.

[0040] The first end stop can be configured such that pivoting of the backrest along the pivot direction from the non-use position to the use position can be blocked beyond the use position. By pivoting the locking lever from the unlocked position to the locked position, the remaining pivot direction of the backrest in the use position can also be blocked. Thus, depending on the position of the locking lever, the backrest can be pivoted in the use position either toward the non-use position or not.

[0041] In addition, the second end stop can be designed in such a way that pivoting of the backrest along the pivoting direction from the use position to the non-use position beyond the non-use position can be blocked.

[0042] In one embodiment of the proposed solution, the locking lever for locking the backrest in the locked position can engage the guide element. In particular, the locking lever can engage the guide element in such a way that movement of the guide element along its trajectory can be blocked. Thus, the guide element can be fixed via the locking lever.

[0043] In a further embodiment of the proposed solution, the guide element can be configured to slide along the locking lever when the backrest is pivoted from the non-use position to the use position, thereby deflecting the locking lever from the locked position. Thus, the backrest can be configured to introduce an adjustment force into the locking lever when pivoting from the non-use position to the use position. This can increase user comfort when adjusting the backrest from the non-use position to the use position.

[0044] For example, the backrest can be configured to engage the locking lever when pivoting from the non-use position to the use position and to deflect the locking lever from the locked position. In one conceivable and possible embodiment, the backrest can rest against the locking lever with the guide element. For example, when pivoting the backrest from the non-use position to the use position, the guide element can initially rest against the locking lever and deflect the lever against the preload upon further pivoting towards the use position. The guide element can slide along the locking lever.

[0045] As it slides along the locking lever, the guide element can be supported by a contour of the locking lever. The contour can be used to define the deflection of the locking lever when pivoting the backrest from the non-use position to the use position.

[0046] In a further embodiment, the proposed vehicle seat can have a coupling mechanism for coupling an adjustment movement of the seat part with a pivoting movement of the backrest. This can further increase user comfort. In particular, the proposed vehicle seat can have a coupling element for coupling the adjustment movement of the seat part with the pivoting of the backrest, which transmits the adjustment movement of the seat part to the backrest.

[0047] In one embodiment, a coupling element can be pivotally connected to the backrest, the seat part, and the upper rail. For example, the coupling element can be pivotally mounted on the backrest about a first coupling pivot axis and on the seat part about a second coupling pivot axis. For example, the first coupling pivot axis can run parallel to the second coupling element pivot axis. In a further embodiment, the first coupling element pivot axis and / or the second coupling element pivot axis can run parallel to the backrest pivot axis and / or the seat part pivot axis.

[0048] The coupling element can also be formed, for example, with a lever. In another exemplary embodiment, the coupling element can be formed with a toggle joint. In principle, a vehicle seat of the proposed solution can also have a plurality of coupling elements, in particular one on each side of the vehicle seat.

[0049] In a supplementary or alternative embodiment, the coupling element can be pivotally mounted on the sliding element. The coupling element can thus be translationally displaceable relative to the seat part via the sliding element.

[0050] In one embodiment, the coupling element can be translationally adjustable relative to the seat part by adjusting the seat part between the non-use position and the use position. For example, the backrest can be pivoted between the use position and the non-use position by translationally displacing the coupling element.

[0051] In a further embodiment of the proposed solution, the unlocking ramp can be arranged on the sliding element. The unlocking ramp can thus be translationally displaceable relative to the seat part via the sliding element. In particular, the unlocking ramp can be translationally adjustable relative to the seat part by adjusting the seat part between the non-use position and the use position.

[0052] In a further embodiment of the vehicle seat according to the proposed solution, the seat part can be mounted on the seat base in a rotationally adjustable manner relative to the seat base.

[0053] In a further alternative or additional embodiment of the seat part, the seat part can be translationally adjustable relative to the seat base.

[0054] In one embodiment, the seat part can also be adjustable between a non-use position and a use position. For example, in the use position, the seat part, when properly installed, can provide a seating surface for the vehicle seat occupant. Additionally, in the non-use position, the seat part can reduce the space occupied by the vehicle seat in the vehicle. For example, in the properly installed state of the vehicle seat, the seat part can be adjustable toward the vehicle floor when adjusting the seat part from the use position to the non-use position.

[0055] Thus, the load space provided in the vehicle interior with the properly installed vehicle seat can be increased through the translational adjustability of the seat section. Furthermore, getting in and out of the vehicle can be made easier.

[0056] In an alternative or additional embodiment, the inclination of the seat part relative to the backrest can be adjustable. The inclination of the seat part can be adjusted to a user-specific comfort position when the backrest is in use. Alternatively or additionally, the inclination of the seat part can also be adjustable when the backrest is not in use.

[0057] In a further embodiment of the vehicle seat, the seat part can be rotationally adjustable about a seat part pivot axis which runs parallel to a backrest pivot axis about which the backrest can be pivoted from the use position to the non-use position.

[0058] In a supplementary or alternative embodiment, the seat part can have a seat part lever. The seat part lever can be pivotally mounted on both the seat part and the seat base. In one embodiment, the seat part pivot axis can extend through the mounting of the seat part lever on the seat base.

[0059] In an alternative or additional embodiment, the vehicle seat can have an energy storage device. Such an energy storage device can be configured to cause a restoring force opposite to the applied force in response to a force applied to the energy storage device. The applied force can, for example, cause compression or expansion of the energy storage device.

[0060] For example, such an energy storage device can be connected to the seat part lever above or below the bearing of the seat part lever in order to introduce the restoring force into the seat part lever in response to a pivoting of the seat part lever from a predetermined neutral position of the seat part lever. In particular, the seat part lever can be preloaded by the energy storage device in one of the possible pivoting directions of the seat part lever.

[0061] In principle, the seat part can also have a plurality of seat part levers, in particular one on each side of the vehicle seat.

[0062] Furthermore, the proposed vehicle seat can also comprise a seat base on each side of the vehicle seat, with a locking lever of the proposed type being arranged on each seat base. Accordingly, the vehicle seat can also be designed with two unlocking ramps, each arranged on a respective side of the vehicle seat, for moving one of the locking levers from the locked position to the unlocked position.

[0063] In an alternative or additional embodiment, the coupling element can also be used to pivot the backrest from the non-use position to the use position by adjusting the seat part from the non-use position to the use position. The number of actions required to transfer the vehicle seat from the use position to the non-use position can thus be reduced. This can increase the operating comfort of the vehicle seat.

[0064] In principle, the pivoting of the backrest, the pivoting of the seat, or the coupled pivoting of the backrest and seat can be operated by external power. In one exemplary embodiment, the sliding element can be displaced along the rail by a motor via a linear drive.

[0065] The aforementioned problem is also solved by a car with at least one vehicle seat of the proposed type. Statements regarding the advantages and special embodiments of the vehicle seat therefore also apply analogously to the proposed car.

[0066] Furthermore, the aforementioned problem is also solved by an assembly method. The proposed assembly method therefore comprises at least the following steps: i. Providing a seat base with a backrest pivotably mounted on the seat base between an upright use position and a non-use position, as well as an adjustable seat part and a locking lever pivotably mounted on the seat base between a locking position and an unlocking position and pre-tensioned towards the locking position, ii. Temporarily fixing the locking lever in the locking position, whereby - the locking lever can be deflected from the locked position to the unlocked position when the vehicle seat is mounted by pivoting the backrest from the non-use position to the use position, - the locking lever is in its locked position in the use position of the backrest to prevent the backrest from pivoting from the use position to the non-use position, and - the locking lever can be deflected from the locking position to the unlocking position against the pretension to release the backrest in the use position by means of a release ramp coupled to the seat part, iii. Mounting the release ramp while the locking lever is temporarily fixed in the locked position, and iv. Releasing the temporary fixation of the locking lever so that the locking lever can pivot between its locked position and its unlocked position.

[0067] The proposed assembly method allows the installation of a vehicle seat whose backrest, when installed in the use position, is automatically locked against adjustment to the non-use position due to the pretensioning of the locking lever. By releasably locking the locking lever in the locking position, the pivoting of the locking lever is blocked during assembly. This can facilitate the installation of the vehicle seat.

[0068] To temporarily fix the locking lever, a detachable fixing element can be used, which is removed after the release ramp has been installed.

[0069] In one embodiment, to secure the locking lever in the locked position, a locking opening in the locking lever can be aligned with a locking opening in the seat base. By inserting the locking element into the aligned locking openings, the locking lever can thus be releasably secured. For example, a bolt can be inserted into the aligned locking openings for releasable securing.

[0070] Once installed, the locking element is removable. Removing the locking element can release the locking lever from the locked position. Thus, the locking lever can be pivoted between the locked and unlocked positions by removing the locking element.

[0071] In a further embodiment of the proposed assembly method, the unlocking ramp can be connected to a sliding element displaceably mounted relative to the locking lever via a fastening part in an assembly position.

[0072] The sliding element can be displaceably mounted on a rail of the seat base. In particular, the sliding element can be translationally displaceable on the rail relative to the seat base when the seat part is adjusted from the non-use position to the use position.

[0073] In a further embodiment, the fastening part can extend through an elongated hole in the unlocking ramp and / or the sliding element, wherein the elongated hole allows adjustment of the unlocking ramp relative to the sliding element, so that a plurality of further mounting positions of the unlocking ramp can be set.

[0074] For example, while the locking lever is temporarily fixed, the release ramp can be aligned on the sliding element to compensate for manufacturing tolerances such that the locking lever is deflected from the locked position by the adjustment movement of the seat part. The alignment can be achieved by selecting a mounting position from the plurality of mounting positions in which the release ramp can be attached to the sliding element.

[0075] In principle, the proposed assembly method can relate to a vehicle seat of the proposed type. Statements regarding the advantages and specific embodiments of the vehicle seat therefore also apply analogously to the assembly method.

[0076] In principle, the proposed solution is not limited to the feature combinations discussed in the above embodiments. Rather, the proposed solution also encompasses combinations of different embodiments.

[0077] The attached figures illustrate possible embodiments of the proposed solution.

[0078] Here we show: Fig. 1A is a perspective view of a vehicle seat having a seat base, a seat portion, and a pivotable backrest in a use position; Fig. 1B shows a further perspective view of the vehicle seat from Fig. 1A; Fig. 2 a side view of a section of the seat base of the Fig. 1A shown vehicle seat; Fig. 3 a side view of the vehicle seat Fig. 1A; Fig. 4 a perspective view of a section of the seat base of the Fig. 1A with the backrest pivoted into a position of use; Fig. 5A to 5D Side views of the locking lever from Fig. 4 in different positions; and Fig. 6A to 6D perspective view of the Fig. Positions shown in Figures 5A to 5D.

[0079] In Fig. Figure 1A shows a perspective view of a vehicle seat 1 according to the proposed solution. Such a vehicle seat 1 comprises a seat base 2, a seat part 3 arranged on the seat base 2 and adjustable relative to the seat base 2, and a backrest 4 pivotably mounted on the seat base 2 between an upright use position 4A and a non-use position 4B pivoted toward the seat part 3. Furthermore, such a vehicle seat also comprises a locking lever 5 pivotable via the seat part 3 between a locking position 5A and an unlocking position 5B and pretensioned toward the locking position 5A. The locking lever 5 can be deflected from the locking position 5A into the unlocking position 5B by pivoting the backrest 4 from the non-use position 4B into the use position 4A and is in its locking position 5A due to the pretension in the use position 4A of the backrest 4.In the locking position 5A, the locking lever 5 locks the backrest 4 against pivoting from the use position 4A into the non-use position 4B. To release the locking of the backrest 4 in the use position 4A, the locking lever 5 can be deflected from the locking position 5A into the unlocking position 5B against the pretension by means of an unlocking ramp 52 coupled to the seat part 3.

[0080] The non-use position 4B of the backrest 4 serves in particular to reduce the space occupied by the vehicle seat 1 mounted in a vehicle. In contrast, the use position 4A serves in particular to provide a seat surface and a backrest 4 suitable for leaning against for a vehicle seat occupant.

[0081] In the Fig. In the embodiment shown in Figure 1A, the backrest 4 is pivotably mounted on the seat base 2 by means of two bearings 42 on either side of the backrest 4. The bearings 42 define the backrest pivot axis 4C, about which the backrest 4 can pivot from the illustrated use position 4A into a non-use position 4B (not shown). The seat base 2 has two guide slots 21 (not shown) on either side to guide the backrest 4 when pivoting between the use position 4A and the non-use position 4B. Furthermore, a guide element 41 is arranged on either side of the backrest 4, which guide element is guided along one of the guide slots 21 when pivoting the backrest 4 from the use position 4A to the non-use position 4B.

[0082] The seat base 2 has two rails 22, each with a longitudinal axis 211. The rails 22 are arranged with the longitudinal axes 211 orthogonal to the backrest pivot axis 4C on the seat base 2. In addition, two seat part levers 31 are pivotally mounted on the rails 22. The pivotable mounting of the seat part levers 31 defines the seat part pivot axis 3A, about which the seat part levers 31 are pivotable. In addition, the seat part levers 31 are also pivotally mounted on the seat part 3. Thus, the seat part 3 is in the Fig. 1A, the vehicle seat 1 is pivotally mounted on the seat base 2.

[0083] Furthermore, the seat part 3 is adjustable about the seat part pivot axis 3A, which runs parallel to the backrest pivot axis 4C, about which the backrest 4 can be pivoted from the use position 4A to the non-use position 4B. The seat part 3 is also adjustable between a non-use position and a use position. In this case, the seat part 3 is in the Fig. 1A, the seat part 3, when properly installed, provides a seating surface for the vehicle seat user.

[0084] A sliding element 32 is mounted on each of the rails 22 for translational displacement along the longitudinal axis 211 of the rails 22. The two sliding elements 32 are in turn pivotally mounted on the seat part 3. Thus, the seat part 3 is translationally adjustable relative to the seat base 2.

[0085] Fig. 1B shows a further perspective view of the vehicle seat 1 from the Fig. 1A in a rear view.

[0086] In an alternative embodiment deviating from the illustrated embodiment, the number of guide elements 41, rails 22, guide slots 21, locking levers 5, sliding elements 32, and seat part levers 31 may differ from the number illustrated here. In particular, alternative embodiments may comprise exactly one guide element 41, one guide slot 21, and one locking lever 5.

[0087] Fig. 2 shows a side view of a section of the left seat base 2 of the Fig. 1A shown vehicle seat 1. According to the Fig. 1A, the backrest 4 is pivotably mounted on the seat base 2 via the bearing 42. The backrest 4 is in the use position 4A. The guide element 41 arranged on the backrest 4 engages in the guide slot 21 of the seat base 2. Parts of the guide slot 21 are shown in the illustration in Fig. 2. In the concealed area, the course of the guide slot 21 is shown by dashed lines. The locking lever 5 is partially encompassed on its underside by a spring element 51, which preloads the locking lever 5 toward the locking position 5A. Here, the spring element 51 is supported on the seat base 2 in a manner not shown.

[0088] In the Fig. In the use position 4A of the backrest 4 shown in FIG. 2, the guide element 41 of the backrest 4 rests against a first end stop 21A. Furthermore, the seat base 2 has a second end stop 21B. By pivoting the backrest 4 from the use position 4A into the non-use position 4B (not shown), the guide element 41 is pivoted along the guide slot 21 from the first end stop 21A in the direction of the second end stop 21B.

[0089] A fixing opening 8 is provided in the seat base 2. The fixing opening 8 is aligned with a fixing opening 8 (not shown) of the locking lever 5 in its locked position. By inserting a fixing element into the aligned fixing openings 8, the locking lever 5 can thus be releasably fixed in the locked position 5A.

[0090] Furthermore, the seat rail 22 is arranged on the seat base 2, on which the sliding element 32 is mounted in a manner not shown so as to be translationally displaceable. The sliding element 32 is connected to the seat part 3 shown. The locking lever 5 is mounted on the seat base 2 via the bearing 54 so as to be pivotable between the locking position 5A and the unlocking position 5B. In the locking position 5A shown, the locking lever 5 locks the backrest 4 in the use position 4A. The locking lever 5 is in the Fig. 2 is obscured by the seat base 2. The guide element 41 is locked by the locking lever 5 with respect to pivoting in the direction of the second end portion 21B.

[0091] Fig. 3 shows a side view of the vehicle seat 1 from the Fig. 1A. The backrest 4 is as already shown in the Fig. 1A in the use position 4A is pivotally mounted on the seat base 2 via the bearing 42. The backrest 4 has a guide element 41 which is guided in the guide slot 21 of the seat base 2 between the first end stop 21A and a second end stop 21B. In the illustrated use position 4A of the backrest 4, the guide element 41 rests against the first end stop 21A. In this position, the guide element 41 is fixed in the locked position 5A via the locking lever 5. Pivoting of the backrest 4 is therefore not possible. In particular, pivoting of the backrest 4 is also not possible due to a force F introduced into the backrest 4. Thus, by fixing the guide element 41, the backrest 4 is locked against unintentional pivoting, for example due to slipping load in the event of an accident.

[0092] As in Fig. 1A, the seat part 3 is also adjustably mounted on the seat base 2. The seat part 3 is pivotally connected to the seat part lever 31. The seat part lever 31 is also pivotally mounted on the rail 22 connected to the seat base 2.

[0093] Fig. 4 shows a perspective view of a section of the left seat base 2 of the Fig. 1A in the use position 4A of the backrest 4. The backrest 4 is pivotably mounted about the backrest pivot axis 4C on the seat base 2 via the bearing 42 (not shown). Furthermore, the rail 22 is arranged on the seat part 2, on which the sliding element 32 of the seat part 3 is mounted so as to be translationally displaceable. The unlocking ramp 52 is connected to the sliding element 32. The unlocking ramp 52 has a support section 521 which is designed to be supported on a driver 55 of the locking lever 5 when the unlocking ramp 52 is displaced in the direction of a rear side of the vehicle seat in such a way that a deflection force 53 is introduced into the locking lever 5 by the displacement of the unlocking ramp 52.

[0094] Temporal snapshots of an adjustment process of the locking lever 5 by the unlocking ramp 52 are shown in the Fig. 5A to 5D and 6A to 6D. The Fig. 5A and Fig. 6A a side view, respectively a perspective view, of the locking lever 5 from the Fig. 4 in the locked position 5A. The backrest 4 is adjusted to the use position 4A. Accordingly, the locking lever 5 rests against the backrest 4 with a section facing the backrest 4, thus blocking the pivoting of the backrest 4 from the use position 4A towards the non-use position 4B. A spring element 51 designed as a torsion spring is arranged around the bearing 54 of the locking lever 5 on the seat base, which spring element is supported at one end on the seat base 2 and at the other end on the locking lever 5. This preloads the locking lever 5 in the direction of the locked position 5A. Furthermore, the locking lever 5 has a driver 55 designed as a cylinder. The unlocking ramp 52 rests against the driver 55 with the support section 521. When the unlocking ramp 52 is moved in the direction of the rear of the vehicle seat, the driver 55 of the locking lever 5 can be moved and the locking lever 5 can thus be deflected.In order to be able to move the release ramp 52 by an adjustment movement of the seat part 3, the release ramp 52 is attached to the sliding element 32 of the seat part 3 with a fastening part 71. The sliding element 32 is displaceably mounted on the rail 22 of the seat base 2. Thus, when the seat part 3 is moved toward the rear of the vehicle seat, the sliding element 32 slides along the rail 22 in the same direction, thus also displacing the release ramp 52 relative to the locking lever 5 toward the rear of the vehicle seat.

[0095] The Fig. 5B and Fig. 6B show the locking lever 5 from the Fig. 5A and Fig. 6A in another of the Fig. 5A and Fig. 6A different positions of the seat part 3. In this case, compared to the Fig. 5A and Fig. 6A, the seat part 3 of the vehicle seat 1 is displaced towards the rear of the vehicle seat. As a result, the locking lever 5 is deflected from the locking position 5A via the driver 55 by the unlocking ramp 52. The Fig. 5B and Fig. The deflection of the locking lever 5 from the locking position 5A shown in Figure 6B is not sufficient to allow the backrest 4 to pivot from the use position 4A to the non-use position 4B. The backrest 4 is therefore also in the position shown in the Fig. 5B and Fig. 6B, the locking lever 5 is locked against pivoting. However, the lock can be released by further moving the unlocking ramp 52 and thus further deflecting the locking lever 5.

[0096] The Fig. 5C and Fig. 6C a side view, or rather a perspective view, of the locking lever 5 fully deflected into the unlocking position 5B. Compared to the Fig. 5B and Fig. 6B, the seat part 3 is shifted further towards the rear of the vehicle seat. As shown in particular in the Fig. 6C, the release ramp 52 is displaced relative to the locking lever 5 in such a way that the release ramp 52 and the locking lever 5 no longer have contact. Rather, the release ramp 52 is displaced during the adjustment movement of the seat part 3 between the Fig. 5B and Fig. 6B and the arrangement shown in the Fig. 5C and Fig. 6C, the locking lever 5 is slid along the locking lever 5. During the sliding movement, the locking lever 5 is supported by the driver 55 on the sliding section 522 of the unlocking ramp 52. As a result, the locking lever 5 is fixed in the unlocking position 5B as long as the driver 55 is in contact with the sliding section 522. In the Fig. 5C and Fig. 6C, the unlocking ramp 52 is displaced relative to the locking lever 5 to such an extent that the unlocking ramp 52 has slid along with the sliding section 522 under the driver 55 and is separated from it again. The locking lever 5 is thus in the Fig. 5C and Fig. 6C, the arrangement shown is no longer held in the unlocking position 5B by the unlocking ramp 52. However, due to the adjustment movement of the seat part 3 with the backrest 4, which is coupled via the coupling element 6, Fig. 5C and Fig. 6C, the backrest 4 is also pivoted from the use position 4A towards the non-use position. When pivoting the backrest 4, the guide element 41 of the backrest 4 is pivoted in an area above the locking lever 5. Thus, the backrest 4 prevents the locking lever 5 from being returned to the locked position 5A due to the pretension. When the backrest 4 is further adjusted towards the non-use position, the guide element 41 slides on a Fig. 5C and Fig. 6C above, along the contour of the locking lever 5. As soon as the guide element 41 of the backrest 4 has slid completely along the locking lever 5, the latter is no longer fixed in the unlocked position by the unlocking ramp 52 or by the backrest 4 and is moved into the locked position 5A by the pretension.

[0097] The Fig. 5D and Fig. 6D a side view, respectively a perspective view, of the locking lever 5 from the Fig. 5C and Fig. 6C. In contrast to the Fig. 5C and Fig. In the arrangement shown in Figure 6C, the backrest 4 is in the Fig. 5D and Fig. 6D is completely pivoted into the non-use position 4B. As a result, the unlocking ramp 52 is also displaced relative to the locking lever 5 via the coupling to the seat part 3, whereby the unlocking ramp 52 neither rests against the locking lever 5 with its support section 521 nor with its sliding section 522. The locking lever 5 is therefore adjusted to the locking position 5A due to the pretension.

[0098] Since the locking lever 5 does not rest on the backrest 4, the pivoting of the backrest 4 is not blocked. In particular, the backrest 4 can be pivoted from the position shown in the Fig. 5D and Fig. 6D in the direction of the use position 4A. This brings the Fig. 5D and Fig.6D, the guide element 41 of the backrest 4, arranged above the locking lever 5, rests against the upper contour of the locking lever 5. When the backrest 4 is pivoted, the guide element 41 is supported on the locking lever 5 in such a way that the locking lever 5 is deflected against the pretension from the spear position 5A into the unlocked position 5B. As soon as the backrest 4 reaches the use position 4A, the guide element 41 of the backrest 4 has slid completely along the upper contour of the locking lever 5 and can therefore no longer fix the locking lever 5 in the unlocked position 5B. Due to the coupling of the adjustment movement of the backrest 4 with the adjustment movement of the seat part 3, the seat part 3 is displaced relative to the locking lever 5 in the direction of the front of the vehicle seat when the backrest 4 is pivoted into the use position 4A. As a result, the unlocking ramp 52 is also displaced in the direction of the front of the vehicle seat.As soon as the backrest 4 reaches the use position 4A, the locking lever 5 is not fixed in the unlocked position 5B by either the unlocking ramp 52 or the backrest 4 and is therefore automatically adjusted to the locked position 5A by the pretension. A renewed adjustment of the backrest 4 toward the non-use position 4B is only possible after the locking lever 5 is again deflected via the seat part 3. List of reference symbols 1 vehicle seat F Force 2 seat base 21 Guide backdrop 21A, 21B End stop 22 rail 221 Longitudinal axis of the rail 3 Seat part 3A Seat part swivel axis 31 Seat part lever 32 sliding element 4 backrest 4A Usage position 4B Non-use position 4C Backrest swivel axis 41 Guide element 42 Backrest storage 5 locking levers 5A Locked position 5B Unlocking position 51 spring element 52 Unlocking ramp 521 support section 522 sliding section 53 Deflection force 54 Bearing of the locking lever 55 drivers 6 coupling element 7 Opening 71 Fastening part 8 Fixing opening

Claims

[1] Vehicle seat (1), comprising: - a seat base (2), - a seat part (3) mounted on the seat base (2) and adjustable relative to the seat base (2), - a backrest (4) pivotably mounted on the seat base (2) between an upright use position (4A) and a non-use position (4B) pivoted towards the seat part (3), - a locking lever (5) pivotably mounted on the seat base (2) between a locking position (5A) and an unlocking position (5B) and pre-tensioned in the direction of the locking position (5A), wherein - the locking lever (5) can be deflected from the locking position (5A) to the unlocking position (5B) by pivoting the backrest (4) from the non-use position (4B) to the use position (4A), - the locking lever (5) is in its locking position (5A) in the use position (4A) of the backrest (4) in order to lock the backrest (4) against pivoting from the use position (4A) to the non-use position (4B), and - the locking lever (5) can be deflected from the locking position (5A) into the unlocking position (5B) against the pretension in order to release the locking of the backrest (4) in the use position (4A) by means of an unlocking ramp (52) coupled to the seat part (3). [2] Vehicle seat (1) according to claim 1, characterized by that the unlocking ramp (52) is mounted on the seat base (2) so as to be displaceable relative to the locking lever (5). [3] Vehicle seat (1) according to claim 1 or 2, characterized by that the unlocking ramp (52) is designed to displace a driver (55) of the locking lever (5) by the adjusting movement of the seat part (3) in order to deflect the locking lever (5) against the pretension. [4] Vehicle seat (1) according to one of the preceding claims, characterized by that the locking lever (5) in the locking position (5A) for locking the backrest (4) in the use position (4A) rests against a section of the backrest (4). [5] Vehicle seat (1) according to one of the preceding claims, characterized by that the seat part (3) has a sliding element (32) and the seat base (2) has a rail (22) and the sliding element (32) is slidably mounted on the rail (22). [6] Vehicle seat (1) according to claim 5, characterized by that the unlocking ramp (52) is arranged on the sliding element (32). [7] Vehicle seat (1) according to claim 5 or 6, characterized by in that, in order to connect the unlocking ramp (52) to the sliding element (32), the unlocking ramp (52) and the sliding element (32) each have an opening (7) through which a fastening part (71) extends. [8] Vehicle seat (1) according to claim 7, characterized byin that, in order to define a plurality of possible mounting positions, at least one of the openings (7) in the unlocking ramp (52) or the sliding element (32) is an elongated hole. [9] Vehicle seat (1) according to one of the preceding claims, characterized by in that the backrest (4) has a guide element (41) which, in order to limit an adjustment path of the backrest (4), rests against a first end stop (21A, 21B) of the seat base (2) in the use position (4A) and against a second end stop (21A, 21B) of the seat base (2) in the non-use position (4B). [10] Vehicle seat (1) according to one of the preceding claims, characterized by that the guide element (41) is designed to slide along the locking lever (5) and to deflect the locking lever (5) out of the locking position (5A) by pivoting the backrest (4) from the non-use position (4B) into the use position (4A). [11] Vehicle seat (1) according to one of the preceding claims, characterized by that the vehicle seat (1) has a coupling element (6) for coupling the adjustment movement of the seat part (3) with the pivoting of the backrest (4), which coupling element transmits the adjustment movement of the seat part (3) to the backrest (4). [12] Vehicle seat (1) according to claim 11, characterized by that the coupling element (6) is pivotally connected to the backrest (4), the seat part (3) and the upper rail (22). [13] Assembly method for a vehicle seat (1), comprising at least the following steps: i. Providing a seat base (2) with a backrest (4) pivotably mounted on the seat base (2) between an upright use position (4A) and a non-use position (4B), as well as an adjustable seat part (3) and a locking lever (5) pivotably mounted on the seat base (2) between a locking position (5A) and an unlocking position (5B) and pre-tensioned in the direction of the locking position (5A), ii. Temporarily fixing the locking lever (5) in the locking position (5A), whereby - the locking lever (5) can be deflected from the locking position (5A) to the unlocking position (5B) in the mounted state of the vehicle seat (1) by pivoting the backrest (4) from the non-use position (4B) to the use position (4A), - the locking lever (5) is in its locking position (5A) in the use position (4A) of the backrest (4) in order to lock the backrest (4) against pivoting from the use position (4A) to the non-use position (4B), and - the locking lever (5) can be deflected from the locking position (5A) into the unlocking position (5B) against the pretension in order to release the locking of the backrest (4) in the use position (4A) by means of an unlocking ramp (52) coupled to the seat part (3), iii. Mounting the release ramp (52) while the locking lever (5) is temporarily fixed in the locking position (5A), and iv. Releasing the temporary fixation of the locking lever (5) so that the locking lever (5) can be pivoted between its locking position (5A) and its unlocking position (5B). [14] Assembly method according to claim 13, characterized bythat the locking lever (5) and the seat base (2) each have a fixing opening (8) through which a fixing element is releasably inserted for temporarily fixing the locking lever (5) to the seat base (2). [15] Assembly method according to claim 13 or 14, characterized by that the unlocking ramp (52) is connected to a sliding element (32) displaceably mounted relative to the locking lever (5) via a fastening part (71) in an assembly position. [16] Assembly method according to claim 15, characterized by that the fastening part (71) extends through an elongated hole in the unlocking ramp (52) and the sliding element (32).

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