Vehicle seat with Easy Entry adjustment

Abstract

Vehicle seat (1) with Easy Entry adjustment, which has: a lengthwise adjustable seat cushion (2), a backrest (3) which is attached to the seat cushion (2) in a foldable manner and which is locked to the seat cushion (2) via a backrest lock and can be folded forward into an Easy Entry position after the backrest lock has been unlocked, a switching device (11) which is designed to detect a folding of the backrest (3) and to output an electrical switching signal, wherein the switching device (11) has a switch unit (6) fastened to the backrest (3) and a shaped component (25) fixedly provided relative to the seat cushion (2), wherein the switch unit (6) comprises a housing (7) attached to the backrest (3), a pivotable lever (12) mounted on or in the housing (7) and a switch (15) accommodated on or in the housing (7), wherein the lever (12) has a lever arm (28) for adjustment by the shaped component (25) and a cam surface (29) for actuating the switch (15), wherein the lever arm (28) can be pivoted forwards into the Easy Entry position by the shaped component (25) when the backrest (3) is folded forwards in such a way that the switch (15) can be actuated by the cam surface (29), wherein the switch (15) has a spring-mounted switching tongue (30) and a switching plunger (32) adjustable by the switching tongue (30), wherein the switching tongue (30) is designed to bear against the cam surface (29) of the lever (12) and to be adjusted by the cam surface (29) of the lever (12).

Description

The invention relates to a vehicle seat with easy entry adjustment.Vehicle seats with easy entry adjustment generally allow access to a rear row of seats. Thus, in a three door vehicle, after opening one of the side vehicle doors, the user can unlock a backrest lock, fold the backrest of the vehicle seat forward into an easy entry position, and subsequently adjust the vehicle seat forward on a rail system which is generally formed from lower rails fastened in the vehicle and upper rails accommodated on the lower rails. In this case, motorized longitudinal adjustments are also known, in which the seat is automatically longitudinally adjusted forwards after the backrest has been folded forwards into the easy entry position. For the purpose of restoring the vehicle seat, the user can generally fold the backrest to the rear from the rear row of seats, whereupon the vehicle seat is restoring the vehicle seat in a motorized manner to the rear. The automatic longitudinal adjustment to the front by motor generally takes place after a detection of the backrest unlocking or the forward folding.In addition to the easy entry adjustment by folding the backrest forward, a comfort inclination adjustment is generally provided in an angle range of, for example, approximately 20 degrees, wherein the comfort inclination adjustment takes place when the backrest is locked. Such inclination adjustments of the backrest must accordingly not be misdesigned as easy entry forward flaps.Various systems are known for detecting easy entry unlocking or forward folding of the backrest.DE 10 2017 208 843 A1 discloses a seat adjuster for a vehicle seat, comprising a rotating mechanism including a rotating part and a rotating drive device driving the rotating part. In addition, the seat adjuster includes an engagement target part rotatably integrated with the rotating part and having engagement target portions formed along the rotation direction of the engagement target part.Furthermore, an engagement part is present which is designed such that, once one of the engagement target portions is arranged in a defined engageable position, it can be moved towards the engagement target part in order to engage this portion.EP 1 587 706 A1 describes a control system for a vehicle seat, which has a seat part, a seat part motor, a backrest, a manual reclining mechanism and a control circuit. The control circuit controls the motor in response to a change in the inclination angle of the seat back, and then the seat part motor longitudinally adjusts the seat part.Such reclining systems generally cannot be used for easy entry unlockings.DE 10 2004 044 713 B3 describes a control device for a longitudinal adjustment of a vehicle seat with an easy entry switch which is actuated when a backrest unlocking handle is actuated. A back stop switch is provided which is actuated at a partially forwardly folded easy entry position of the backrest and outputs a signal to a control module for actuating a motor for longitudinal adjustment of the seat in the forward and rearward direction. The control module is designed as a relay module with a plurality of motor outputs for controlling the motor with different polarities and with an input for the backrest stop switch.DE 10 2004 061 960 A1 describes a device for limiting the pivot angle of fitting parts for the backrest inclination adjustment on vehicle seats. In this case, inclination adjustment fittings are provided, which are positively coupled to a geared motor with a self-locking gear arranged in the backrest via a shaft and a reduction gear. The pivot angle is mechanically limited by end stops. Since the inclination adjustment and the folding movement take place about the same pivot axis of the backrest, the fitting parts decoupled from the backrest are prevented from striking the mechanical end stops of the inclination adjustment fittings by the angular position of the fitting parts being detected. For this purpose, a rotary encoder for detecting the angular position of the fittings is arranged on the shaft which connects the geared motor to the reduction gear. When passing over angular end positions, the geared motor is switched off, wherein, when folding the backrest, a sufficient residual pivot angle is available for the fittings without the fittings running onto the end stops.DE 10 2014 101 666 A1 describes an unlocking device for a vehicle seat, which has an adjustable backrest that can be locked in at least one position. The unlocking device has an actuating shaft for unlocking, an electrical switching device designed as a microswitch for detecting an unlocking process, and a switching cam connected to the actuating shaft for actuating the switching device when the actuating shaft rotates. A receiving part made of plastic or metal receives the switching cam rotatably in a bearing region and furthermore has a holder for the microswitch. The switching cam, which is rotatable in the bearing region, reaches with a switching nose against a switching lever of the microswitch and thus activates the microswitch, so that the microswitch recognizes an actuation. This allows the unlocking process to be detected by the electrical switching device.US 2017 / 0210246 A1 describes a vehicle seat with a seat frame and a seat back frame rotatably mounted on the seat frame, wherein a stop-detecting switching arrangement is provided, which has a switch for preventing a rotation of the backrest when a limit switch is opened.US 2019 / 0381913 A1 describes a seat system with backrest and base part which are connected via an inclination adjuster, wherein a rail system for longitudinal adjustment and an electronic control unit are provided. The control unit causes an inclination adjustment into a non-passenger position if the longitudinal adjustment is within a designated range, wherein the control unit again adjusts the backrest into a passenger position if the longitudinal adjustment is within a designated range.DE 10 2018 216 473 A1 describes a vehicle seat for a motor vehicle having a frame, a backrest pivotably fastened to the frame and a signal transmitter which emits a signal as a function of a pivot position of the backrest relative to the frame, wherein a further seat component is provided which can be adjusted by means of an adjustment mechanism, wherein the adjustment mechanism receives the signal from the signal transmitter and adjusts the further seat component in dependence on the signal.When detecting a folding movement of the backrest, the tolerances of the components due to production and the tolerances during installation in the vehicle seat must generally be taken into account, so that such tolerances do not lead to incorrect switching.The object of the invention is to create a vehicle seat with easy entry adjustment, which permits reliable detection of the easy entry position with relatively little effort.This object is achieved by a vehicle seat according to claim 1. The dependent claims describe preferred refinements. The vehicle seat thus has a switching device for detecting the forward folding of the backrest into the easy entry position, wherein the switching device has, on the one hand, a switch unit, in particular as a microswitch unit, for fastening to the backrest or a backrest side member of the backrest, and, on the other hand, a shaped component for fastening to the seat cushion or to a rectal support fitting attached to the seat cushion.The switching device can thus be formed by relatively few components and with little manufacturing effort and enables precise detection of the folding process of the backrest. Unlike many conventional systems, the actuation of the backrest unlocking is not detected, but rather the folding process of the backrest into the easy entry position. Thus, the longitudinal adjustment does not take place prematurely, but only after the folding process of the backrest. The switch unit and the molded component can be formed and attached independently of the backrest unlocking mechanism, so that a high degree of design freedom is made possible in the design of the backrest.When the backrest is folded forward, a lever of the switch unit is adjusted with respect to the non-pivoted shaped component. When the backrest is folded beyond the inclination adjustment range, a lever arm of the lever is gripped and pivoted by the shaped component. Advantageously, contact of the lever arm with the molded component takes place only outside the inclination adjustment range. As a result of this mechanical interaction, the folding angle is also detected independently of the folding speed.By suitably adjusting the position and shape of the lever arm on the one hand and a shaped curve of the shaped component designed as a mating surface and the shape of the cam surface of the lever relative to a switching tongue of the switch on the other hand, a step-down and / or step-down is advantageously formed, with which the folding movement of the backrest is converted into the pivoting movement of the lever, as a result of which the switch actuation can be reliably adjusted. The lever thus preferably serves as a transmission between the two pairs of cam surfaces.This achieves the advantage that the relatively high manufacturing tolerances of the molded component and of the lever, and also the tolerances of the installation of the molded component on the differential seat back fitting or another component on the seat cushion side relative to the backrest, do not act directly on the switching mechanism. Since the lever and the switch are mounted in the common switch unit, in particular in or on the common housing of the switch unit, they can be positioned with respect to one another with high precision.In this case, a reliable and simple assembly is possible. Thus, the switch unit can be attached as a prefabricated unit directly to the backrest frame, in particular to a side part or side rail of the backrest frame. It can be attached, in particular screwed, in particular to the door-side surface of the side part, as a result of which secure and rapid assembly is made possible.The shaped component can be placed and fastened, for example clipped or inserted elastically in a form-fitting manner, directly on the backrest axle, in particular on a striking plate of the backrest bearing, so that a secure and rapid assembly is made possible.According to an advantageous embodiment, the forming curve is formed on the forming component multiple times or in multiple rotational symmetry, for example in three projections offset by 120°. In the case of, for example, a form-fitting reception of the shaped component in a triple symmetry on the striking plate, e.g. in three slots of the striking plate, correct assembly is thus achieved in each of the possible arrangements, whereby an arrangement preventing poka-yoke formation or misassembly is made possible, whereby rapid and secure assembly is possible.The switch unit has a common housing in or on which its components are formed or attached. This achieves, on the one hand, cost-effective production, furthermore simple mounting on the backrest, and, on the other hand, precise arrangement of the individual components, in particular of the switching tongue of the switch, relative to the cam surface of the lever. The housing can be formed, for example, as an injection-molded part, quickly, accurately and cost-effectively. Thus, one or more of the following elements can be formed in or on the housing:bolt holes and / or bolt domes for fastening to a backrest part, for example the lateral backrest spar of the backresta mounting dome for securely receiving and mounting the lever and preferably a spring of the lever,a latching receptacle for positively and latchingly receiving the switch, in particular with elastic latching tongues which engage behind the switch,a receptacle for a plug housing, which serves for the electrical contacting of the switch unit.In order to prevent incorrect detection of a comfort inclination adjustment as a folding process, an inclination adjustment range of the backrest, which serves for comfort adjustment, and an activation range, in which the lever is pivoted and / or the switch is actuated, are advantageously separated from one another, in particular separated by a spacing angle. Thus, for example, the inclination adjustment range can extend from a rearmost position at, for example, -38 degrees over the basic position of 0 degrees to a front position of 18 degrees, and the activation range for the switch only begin from 21 degrees, with respect to the basic position of the backrest, so that a sufficient angle of separation is present here. The easy entry position may be, for example, at an angle between 40 and 45 degrees, e.g., 42.5 degrees.The cam surface of the lever is adapted to the shape of the counter surface of the switch, in particular of a switching tongue. Thus, the cam surface can have, for example, a first ramp surface or adjusting surface in which the radius of the surface increases during pivoting, and a subsequent receiving surface with a constant radius in which, when the backrest is folded further, the switching tongue thus remains in its pressed-in position and is securely received in the forwardly folded easy entry position.The switching signal output by the switching device is preferably output via a plug housing of the switching unit and an external line to a control device of the vehicle seat, which then activates the motor-driven longitudinal adjustment and adjusts the vehicle seat forward.The electrical detection of the switch is effected in particular via a two-pole plug, which thus enables a reliable and accurate reading of an electrical signal. In this case, the switch can in particular change its resistance value, so that the switching state can be detected via the electrical resistance value and thus with low current values. In this case, a series circuit of two or more resistors can preferably be connected to the connection contacts, which are detected as a series circuit in one switching position and of which, for example, a resistor is bridged in the other switching position, so that a different overall resistor is formed. By suitable dimensioning of the resistors, the switching positions can thus be read out unambiguously and reliably.The invention is explained below with reference to the attached drawings on the basis of an embodiment. The following are shown: FIG. 1 shows a vehicle seat with relevant structural parts; FIG. 2 shows the detail R from FIG. 1 ; FIG. 3 is an inner view of the region of attachment of the backrest to the differential mount, in the locked basic position of the backrest; FIGS. 4 a, b, c) show the forward folding of the unlocked backrest into the easy entry position; FIG. 5 shows the microswitch unit for mounting on a side rail of the backrest, FIG. 6 shows the microswitch unit in exploded view. FIG. 7 shows the adjustment regions of the backrest; FIG. 8 is an electrical schematic diagram of the unactuated microswitch in the reduced basic circuit; FIG. 9 is a circuit diagram of FIG. 8 when the microswitch is actuated in the easy entry position, FIGS. 10 a) to d) show the adjustment of the switching tongue when the backrest is folded forward.According to FIG. 1, a vehicle seat 1 has a seat cushion 2, a backrest 3 which is mounted on the seat cushion 2 in a backrest axis A and has a side member (backrest side part) 5, and a rail system 4 for longitudinally adjusting the seat cushion 2 in the vehicle seat 1. The backrest 3 is held here in a lockable and pivotable manner on a reliner fitting 22 or backrest fitting 22 shown in FIGS. 3 and 4. The seat cushion 2 is generally adjustable in height with respect to the rail system 4, wherein the rail system 4 is formed, for example, by lower rails mounted on the vehicle floor and upper rails mounted on the seat cushion 2, which rails are longitudinally adjustable by a motorized longitudinal adjustment 47 indicated in FIG. 1.FIG. 1 shows the vehicle seat 1 in its use position or normal position, in which the backrest 3 is locked to the retrieval liner fitting 22 in a backrest locking arrangement and is pivotable in the locked position within an inclination adjustment range 35 shown in FIG. 7. In order to get into a rear row of seats, in particular in the case of a three-door vehicle, the user can adjust the vehicle seat 1 into an easy entry position by actuating an unlocking handle (unlocking device) 31 indicated in FIG. 1, which releases the backrest locking, whereupon the user can fold the backrest 3 forward, so that the seat cushion 2 together with the backrest 3 is automatically adjusted on the lower rails of the rail system 4 into a foremost position. The backrest axis A represents the folding axis and the pivot axis of the backrest 3, i.e. for both adjustments.According to FIG. 2, a two-pole microswitch unit (switch unit) 6 is fastened, in particular screwed, to the inside of the side rail 5, which microswitch unit is shown in more detail in FIGS. 5 and 6. The microswitch unit 6 has a housing 7 which is formed as an injection-molded part from a plastics material and has:one or more fastening holes 8 and one or more screw domes 9 for fastening to the side rail 5, furthermore a cylindrical bearing 10 for a lever 12 and a spring 13, a microswitch latching receptacle (switch latching receptacle) 14 having two elastic latching tongues 18 for receiving a microswitch (switch) 15, and a plug receptacle 16 for receiving a plug housing 17.In this case, the spring 13 and the lever 12 are correspondingly placed on the bearing 10 from above in FIG. 6. The microswitch 15 is likewise inserted in FIG. 6 from above into the microswitch latching receptacle 14 and latches there by means of the elastic latching tongues 18. the plug housing 17 is inserted in particular in FIG. 6 in the longitudinal direction of the housing 7. The microswitch unit 6 thus formed can be subsequently fixed to the side rail 5 by means of screws inserted through the screw hole 8 and the screw domes 9, whereupon an electrical plug is inserted into the plug housing 17 to contact and read out the microswitch unit 6.FIG. 4 shows the installation situation of the microswitch unit 6 and various folding positions of the backrest 3, wherein FIG. 4 acorresponds to FIG. 3, FIG. 4 bshows the initial folding and FIG. 4 cshows the backrest 3 folded forward and the microswitch unit 6 is unlocked. An electric motor, not shown here, is seated on a motor shaft 20 that can be seen as a rectangular configuration, which motor motor shaft 20 rotates when actuated in order to achieve a comfort adjustment of the backrest 3 with respect to the reliner fitting 22 and thus the seat cushion 2. The backrest 3 is mounted on the differential mount 22 and secured inward via a closure plate 24. A shaped component 25 is placed on and fastened to the striking plate 24. Consequently, an assembly is made possible by fitting the shaped component 25 onto the striking plate 24 in the axial direction, so that the shaped component 25 is rigidly accommodated on the reliner fitting 22. The molded component 25 has at least one molding curve 26. According to the embodiment shown here, the shaped component 25 is configured in a triple symmetry and can thus be installed in each case equivalently in three angular positions offset by 120 degrees in three receiving slots of the striking plate 24, such that a Poka-Yoke principle is fulfilled and an erroneous installation of the shaped component 25 on the striking plate 24 is avoided.The microswitch unit 6 and the shaped component 25 together form a switching device 11 for detecting the forward folding of the backrest 3 into the easy entry position:The lever 12 has a lever arm 28 which projects downwards in the basic position of FIGS. 3 and 4 a ) and, at its upper region, a cam surface 29 which interacts with a switching tongue 30 of the microswitch 15, which switching tongue is designed, for example, as a sheet metal strip, as is described in particular with reference to FIG. 10. For the sake of clarity, FIGS. 10 a) to d) show the switching tongue 30 in all positions. In the basic position of FIGS. 3 and 4 a), the lever arm 28 projects downward in its spring-biased basic position.When the user unlocks the backrest lock, he can fold the backrest 3 forward according to FIGS. 4 b), c). During this folding movement, the side rail or backrest rail 5 thus correspondingly pivots forward with the microswitch unit 6, i.e. clockwise in the figures, so that the lever arm 28 pivots forward and reaches against the shaped component 25 and its shaped cam 26, so that the lever 12 pivots on the bearing 10 of the housing 7.When the lever 12 is pivoted, as shown in FIGS. 10 b) and 10 c), a run-on surface 45 of the cam surface 29, which has an increasing radius or distance from the lever axis of rotation, first reaches against the switching tongue 30 of the microswitch 15, so that the switching tongue 30 slides on the run-on surface 45 and is pressed upward against its spring prestress, so that it subsequently actuates a switching plunger 32 of the microswitch 15. Subsequently, the switching tongue 30 slides and rests on a bearing surface 46 of the cam surface 29 with constant radius and remains there in the easy entry position.FIG. 7 shows the adjustment ranges of the backrest 3: The locked backrest 3 is adjustable in inclination within its inclination adjustment range 35, which extends, for example, from a 0 degree basic position to the rear up to a rearmost position, indicated by arrows in FIG. 7, of -38 degrees and to the front up to a +18 degree position, wherein in this inclination adjustment range 35 the lever arm 28 of the lever 12 does not reach the molded component 25 with a pivot angle of a total of 18°+38°=56°. After actuation of the unlocking handle or backrest unlocking 31, the backrest 3 can be folded forward and reaches the activation region 36, which is formed, for example, from an adjustment angle of 21 degrees with respect to the basic position or design position of zero degrees. Thus, the regions 35 and 36 are sufficiently spaced apart from one another with a spacing angle 37 of, for example, 3 degrees or even more, so that tolerances also do not lead to a faulty activation. The backrest 3 thus folds further forward and, according to FIG. 7, reaches the activation region 36, in which the microswitch 15 is actuated, until the easy entry position provided at an angle of 42.5 degrees, for example.By activating the microswitch 15, the motorized longitudinal displacement 47 is activated, which displaces the seat cushion 2 forwards in the longitudinal direction on the rail system 4. After the user has seated himself in the rear row of seats, he can fold the backrest 3 directly to the rear, so that the backrest side member 5 with the microswitch unit 6 pivots back again, and the lever 12 pivots back on account of the spring prestress of the spring 13, that is to say, according to FIG. 7, reaches in turn in front of the activation region 36 and releases the lever 12. As a result, the microswitch 15 is again released and returned from the actuated position to the unactuated position, so that the longitudinal adjustment 47 again adjusts the seat cushion 2 rearward on the rail system 4.FIGS. 8 and 9 show a preferred electrical detection of the switching position of the microswitch 15. In the basic position in the backrest 3, in which the microswitch 15 is unactuated, the electrical resistors R1 and R2 are connected in series and are read out via connection contacts 41 as a total resistor R3, that is to say as a series circuit. For example, with resistance values of R1=750 Ohm and R2=3.920 Ohm, a total resistance of R3=4.670 Ohm is thus obtained. When the switching plunger 32 is actuated, the switching contact 40 is placed between the resistors R 1 and R 2, so that only the first resistor R 1 is present at the connection contacts 41 and a total resistance R 4=R 1=750 OHM is detected by a control device 48 indicated here, for example. These resistance values are far enough apart so that the switching position can be detected unambiguously. The control device 48 can thus actuate the motorized longitudinal adjustment 47.This allows simple production with relatively few and cost-effectively configurable components and simple and secure assembly. In this case, larger tolerances are initially produced between the shaped component 25 and the lever 12 or lever arm 28. Due to the shape of the shaped curve 26 and the position of the lever arm 28, in which the lever 12 is pivoted with a high reduction during the folding forward according to FIGS. 4 a), 4 b) and 4 c), the large tolerances of the pivoting system comprising backrest spar 5 with microswitch unit 6 with respect to the shaped component 25 can be reduced into a pivoting process within the microswitch unit 6.

Claims

Vehicle seat (1) with easy entry adjustment, comprising: a longitudinally adjustable seat cushion (2), a backrest (3) accommodated in a foldable manner on the seat cushion (2), which backrest is locked to the seat cushion (2) via a backrest lock and is pre-foldable into an easy entry position after unlocking the backrest lock, a switching device (11) which is designed to detect a pre-folding of the backrest (3) and to output an electrical switching signal, wherein the switching device (11) comprises a switch unit (6) fastened to the backrest (3) and a shaped component (25) provided fixedly with respect to the seat cushion (2), wherein the switch unit (6) comprises a housing (7) fastened to the backrest (3), a pivotable lever (12) mounted on or in the housing (7) and a switch (15) accommodated on or in the housing (7), the lever (12) having a lever arm (28) for displacement by the shaped component (25) and a cam surface (29) for actuating the switch (15), the lever arm (28) being pivotable by the shaped component (25) when the backrest (3) is folded forwards into the easy entry position in such a way that the switch (15) can be actuated by the cam surface (29), the switch (15) having a resiliently accommodated switching tongue (30) and a switching plunger (32) which can be displaced by the switching tongue (30), the switching tongue (30) being designed to bear against the cam surface (29) of the lever (12) and to be displaced by the cam surface (29) of the lever (12).Vehicle seat (1) according to Claim 1, characterized in that the switch unit (6) furthermore has a plug housing (17) which is accommodated on or in the housing (7) and is electrically contacted by the switch (15), for the external electrical contacting and output of the switching signal.Vehicle seat (1) according to one of the preceding claims, characterized in that an unlocking device (31), which is to be actuated by the user, is provided for unlocking the backrest lock, wherein the switch unit (6) is provided independently of the unlocking device (31) and / or the backrest lock, in particular spatially separated.Vehicle seat (1) according to one of the preceding claims, characterized in that the shaped component (25) is fastened to a backrest fitting (22), in particular a reliner backrest fitting, which is attached to the seat cushion (2) and remains rigidly and / or non-displaceably on the backrest fitting (22) when the backrest (3) is folded.Vehicle seat (1) according to one of the preceding claims, characterized in that the backrest (3) can be pivoted in an inclination adjustment region (35) when the backrest is locked, wherein a common backrest axis (A) is provided for the inclination adjustment and the easy entry folding process, wherein the lever arm (28) is not adjustable by the shaped component (25) when the inclination is adjusted in the inclination adjustment region (35), and an activation region (36) of the backrest (3), in which the lever arm (28) is pivotable by the shaped component (25), is different from the inclination adjustment region (35) and is spaced apart by a spacing angle (37).Vehicle seat (1) according to one of the preceding claims, characterized in that one or more of the following elements are formed in one piece in the housing (7) of the switch unit (6), in particular in one piece by injection moulding: one or more screw holes (8) for fastening to the backrest (3), in particular a side rail (5) of the backrest (3), one or more screw domes (9) for receiving fastening screws for fastening to the backrest (3), in particular the side rail (5) of the backrest (3), a switch latching receptacle (14) having one or more latching tongues (18) for receiving and engaging behind the microswitch (15) in a positive-locking manner, a bearing (10), in particular in the form of a cylindrical bearing configuration, for pivotably mounting the lever (12) and / or a spring (13) for resetting the lever (12), a receptacle for the plug housing (17).Vehicle seat (1) according to Claim 6, characterized in that the cam surface (29) has a front run-on region (45) for active adjustment of the switching tongue (30) and a subsequent, substantially circular-arc-shaped bearing region (46) for receiving the switching tongue (30) in the easy entry position.Vehicle seat (1) according to one of the preceding claims, characterized in that the switch (15) has a two-pole connection with two connection contacts (41) for outputting the electrical switching signal as resistance value, and the switch (15) forms different values of a total resistance (R3, R4) between the two connection contacts (41) in its switching positions.Vehicle seat (1) according to Claim 8, characterized in that the switch (15) is provided with a series circuit of at least two resistors (R1, R2) which, in the two switching positions of the switch (15), can be connected differently to the two connection contacts (41), in particular with bridging of one of two resistors (R1, R2) in one of the switching positions.Vehicle seat (1) according to one of the preceding claims, characterized in that the shaped component (25) is placed and fastened on a striking plate (24) of a backrest bearing of the backrest (3).Vehicle seat (1) according to one of the preceding claims, characterized in that the shaped component (25) has a plurality of shaped curves (26), for example in radially protruding projections, wherein the plurality of shaped curves (26) are each suitable for cooperation with the lever arm (28), wherein when the shaped component (25) is attached to the backrest fitting (22) or the seat cushion (2), only one of the plurality of shaped curves (26) cooperates with the lever arm (28), in particular as a rotationally symmetrical configuration of the shaped component (25) for selective attachment in different rotational positions.Vehicle seat (1) according to claim 11, characterised in that the moulded component (25) is formed as a plate made of a plastic material or metal and comprises: the one or more moulded curves (26), a central shaft receptacle for passing through a motor shaft (20) and fastening means, in particular fastening holes (8) and / or screw domes (9) for receiving screws.Vehicle seat (1) according to one of the preceding claims, characterized in that the vehicle seat (1) has a control device (48) and a motorized longitudinal adjustment (47), wherein the control device (48) is designed to detect the electrical switching signal and to activate the motorized longitudinal adjustment (47), which automatically adjusts the seat cushion (2) forwards, preferably with upper rails, in the longitudinal direction.Vehicle seat (1) according to one of the preceding claims, characterized in that the switch unit (6) is attached to a backrest side member (5) of the backrest (3) on the door side.

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