GB2622480A

GB2622480A - Vehicle seat with easy entry adjustment

Info

Publication number: GB2622480A
Application number: GB2311554.6A
Authority: GB
Inventors: Benke Martin
Original assignee: Faurecia Automotive GmbH
Current assignee: Faurecia Automotive GmbH
Priority date: 2022-08-16
Filing date: 2023-07-27
Publication date: 2024-03-20
Also published as: DE102022120657A1; CN117584821A; GB202311554D0

Abstract

An easy entry vehicle seat has a motorized longitudinally adjustable seat cushion (2, fig 1), a folding backrest (3, fig 1) which locks on the seat cushion, a switch unit 6 fastened to the backrest which detects forward-folding, and a formed component (25, fig 3) on a backrest recliner mechanism, the switch unit having a housing 7 and a pivotable lever 12 with a lever arm 28 moved by the formed component and a cam surface 29 actuating a micro switch 15 when the backrest is folded forward into the easy entry position. A detection circuit (figs 8 & 9) with resistors so the switch position is clearly detected. The formed component can have rotational symmetry to eliminate assembly errors, and fastened to a strike plate (24, fig 3)

Description

VEHICLE SEAT WITH EASY ENTRY ADJUSTMENT

[0001] The invention relates to a vehicle seat with easy entry adjustment.

[0002] Vehicle seats with easy entry adjustment generally enable access to a rear seat row. Thus, in the case of a three-door vehicle, after opening one of the lateral 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 by lower rails, fastened in the vehicle, and upper rails accommodated on the lower rails.

In this respect, motorized longitudinal adjustments are also known, in which, after the backrest has been folded forward into the easy entry position, the seat is automatically longitudinally adjusted forward. In order to return the vehicle seat, the user can generally fold the backrest rearward from the rear seat row, whereupon a motorized return of the vehicle seat rearward takes place. The automatic motorized longitudinal adjustment forward generally takes place after detection of the backrest unlocking or of the forward-folding.

[0003] In addition to the easy entry adjustment by folding the backrest forward, a comfort inclination adjustment in an angular range of, for example, approximately 20 degrees is generally provided, wherein the comfort inclination adjustment takes place when the backrest is locked. Such inclination adjustments of the backrest may accordingly not be misinterpreted as easy entry forward-folding.

[0004] Different systems are known for detecting the easy entry unlocking or a forward-folding of the backrest.

[0005] EP 1 587 706 Al describes a control system for a vehicle seat having a seat part, a seat part motor, a backrest, a manual inclination adjustment mechanism and a control circuit. The control circuit controls the motor as a function of a change in the inclination angle of the backrest, whereupon the seat part motor adjusts the seat part in the longitudinal direction.

[0006] Such inclination adjustment systems can generally not be used for easy entry unlocking.

[0007] 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. In this case, a backrest stop switch is provided, which is actuated at a partially folded-forward easy entry position of the backrest and outputs a signal to a control module for controlling a motor for a seat longitudinal adjustment in the forward and backward directions. 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.

[0008] DE 10 2004 061 960 Al describes an apparatus for limiting the pivoting angle of fitting parts for the backrest inclination adjustment on vehicle seats. In this case, inclination adjustment fittings are provided, which are force-coupled via a shaft and a reduction gear to a geared motor arranged in the backrest with a self-locking transmission. The pivoting 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 running onto the mechanical end stops of the inclination adjustment fittings by sensing the angular position of the fitting parts. For this purpose, a rotary encoder for sensing the angular position of the fitting parts is arranged on the shaft connecting the geared motor to the reduction gear When the angular end positions are overshot, the geared motor is switched off, wherein during the folding of the backrest, a sufficient residual pivoting angle for the fitting parts is available without the fitting parts running onto the end stops.

[0009]DE 10 2014 101 666 Al describes an unlocking apparatus for a vehicle seat which has an adjustable backrest that can be locked in at least one position. The unlocking apparatus has an actuating shaft for unlocking, an electrical switching device designed as a micro switch for detecting an unlocking operation, and a switching cam, connected to the actuating shaft, for actuating the switching device when the actuating shaft is rotated. A receiving part made of plastic or metal receives the switching cam rotatably in a bearing region and furthermore has a holder for the micro switch. During its rotation, the switching cam rotatable in the bearing region arrives, with a switching lug, at a switch lever of the micro switch and thus activates the micro switch so that the latter detects an actuation. This enables the electrical switching device to detect the unlocking operation.

[0010] US 2017/0210246 Al describes a vehicle seat with a seat frame and a backrest frame rotatably attached to the seat frame, wherein a switching arrangement detecting a stop is provided, which switching arrangement has a switch in order to prevent a rotation of the backrest when a limit switch is opened.

[0011]US 2019/0381913 Al describes a seat system with a backrest and a 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 brings about an inclination adjustment into a non-passenger position if the longitudinal adjustment is within a provided range, wherein the control unit in turn adjusts the backrest into a passenger position if the longitudinal adjustment is in a range provided for this purpose.

[0012]DE 10 2018 216 473 Al describes a vehicle seat for a motor vehicle with a frame, a backrest pivotably fastened to the frame, and a signal generator which outputs 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 generator and adjusts the further seat component as a function of the signal [0013] When a folding movement of the backrest is detected, the manufacturing-related tolerances of the components and the tolerances during installation into the vehicle seat are generally to be taken into account so that such tolerances do not lead to incorrect connections.

[0014] The invention is based on the object of creating a vehicle seat with easy entry adjustment, which seat enables reliable detection of the easy entry position with relatively little effort.

[0015] This object is achieved by a vehicle seat according to claim 1. The dependent claims describe preferred developments.

[0016] The vehicle seat thus has a switching apparatus for detecting the forward-folding of the backrest into the easy entry position, wherein the switching apparatus has, on the one hand, a switch unit, in particular as a micro switch unit, for fastening to the backrest or a backrest bar of the backrest and, on the other hand, a formed component for fastening to the seat cushion or to a recliner backrest fitting attached to the seat cushion.

[0017] Thus, the switching apparatus can be formed by relatively few components and with little manufacturing effort and enables precise detection of the folding operation of the backrest. Unlike in many conventional systems, not the actuation of the backrest unlocking but the folding operation of the backrest into the easy entry position is detected. Thus, the longitudinal adjustment does not take place prematurely but only subsequently to the folding operation of the backrest. The switch unit and the formed component may be designed and attached independently of the backrest unlocking so that a high degree of freedom in the design of the backrest is made possible.

[0018] When the backrest is folded forward, a lever of the switch unit is adjusted relative to the non-pivoted formed component. If the backrest is folded beyond the inclination adjustment range, a lever arm of the lever is grasped and pivoted by the formed component. Advantageously, contact of the lever arm with the formed component takes place only outside the inclination adjustment range. Due to this mechanical interaction, the folding angle is also sensed independently of the folding speed.

[0019] By suitably coordinating the position and shaping of the lever arm and of a formed curve of the formed component designed as a mating surface, on the one hand, and the shaping of the cam surface of the lever relative to a switching tongue of the switch on the other hand, a reduction and/or conversion is advantageously formed, by means of 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 is thus preferably used as a step-up gear between the two cam surface pairs.

[0020] This achieves the advantage that the relatively high manufacturing tolerances of the formed component and of the lever, furthermore also the tolerances of the installation of the formed component on the recliner backrest fitting or on another seat-cushion-side component 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 relative to one another with high precision.

[0021] Reliable and simple assembly is possible here. Thus, the switch unit can be attached as a prefabricated unit directly to the backrest frame, in particular to a side part or side bar of the backrest frame. It can in particular be attached, in particular screwed, to the door-side surface of the side part, which enables reliable and quick assembly.

[0022] The formed component may, for example, be placed directly onto the backrest axis, in particular onto a strike plate of the backrest bearing and fastened, for example clipped in or elastically positively inserted, so that reliable and quick assembly is enabled.

[0023] According to an advantageous embodiment, the formed curve on the formed component is formed several times or in multiple rotation symmetry, e.g., in three protrusions offset by 120°. For example, in the case of a positive reception of the formed component in triple symmetry on the strike plate, e.g., in three slots of the strike plate, correct assembly is thus achieved in each of the possible arrangements, which enables a poka-yoke formation or an arrangement preventing incorrect assembly, as a result of which quick and reliable assembly is possible.

[0024] The switch unit has a common housing, in or on which are formed or in or to which are attached its components. This achieves on the one hand cost-effective manufacture, furthermore simple assembly on the backrest, and thirdly 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 may, for example, be formed quickly, precisely and cost-effectively as an injection-molded part. One or more of the following elements can thus be formed in or on the housing: - screw holes and/or screw bosses for fastening to a backrest part, e.g., the lateral backrest bar of the backrest -a bearing boss for reliably receiving and mounting the lever and preferably a spring of the lever, - a latching receptacle for the positive and latching reception of the switch, in particular with elastic latching tongues which engage behind the switch, - a receptacle for a plug housing which is used to electrically contact the switch unit.

[0025] In order to prevent an incorrect detection of a comfort inclination adjustment as a folding operation, an inclination adjustment range of the backrest, which is used for the 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 an angular distance.

For example, the inclination adjustment range may range from a rearmost position at, e.g., -38 degrees via the basic position of 0 degrees to a front position of 18 degrees, and the activation range for the switch may start only from 21 degrees, in relation to the basic position of the backrest, so that there is a sufficient angular distance here. The easy entry position may, for example, be at an angle between 40 and 45 degrees, e.g., at 42.5 degrees.

[0026] The cam surface of the lever is adapted to the shape of the mating surface of the switch, in particular of a switching tongue. For example, the cam surface may have a first run-on surface or adjustment surface in which the radius of the surface increases during pivoting, and a subsequent reception surface of a constant radius, in which reception surface the switching tongue thus remains in its pressed-in position during further folding of the backrest and is reliably received in the folded-forward easy entry position.

[0027] 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 control device thereupon activates the motorized longitudinal adjustment and adjusts the vehicle seat forward.

[0028] The electrical detection of the switch takes place in particular via a two-pole plug, which thus enables reliable and accurate readout 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 at low current values. In this case, a series connection of two or more resistors can preferably be connected to the connecting contacts, which resistors are detected in a switching position as a series connection and one resistor of which is, for example, bridged in the other switching position so that a different total resistance is formed. By suitably dimensioning the resistors, the switching positions can thus be read out unambiguously and reliably.

[0029] The invention is explained below with reference to the accompanying drawings and on the basis of an embodiment. In the drawings: Figure 1 shows a vehicle seat with relevant structural parts; Figure 2 shows detail R of Figure 1; Figure 3 shows an interior view of the region of the attachment of the backrest to the recliner fitting, in the locked basic position of the backrest; Figures 4 a, b, c) show the forward-folding of the unlocked backrest into the easy entry position; Figure 5 shows the micro switch unit for mounting on a side bar of the backrest; Figure 6 shows the micro switch unit in an exploded view; Figure 7 shows the adjustment ranges of the backrest; Figure 8 shows an electrical circuit diagram of the unactuated micro switch in the reduced basic circuit; Figure 9 shows the circuit diagram of Figure 8 of the actuated micro switch in the easy entry position; Figs. 10 a) to d) show the adjustment of the switching tongue when the backrest is folded forward.

[0030] According to Fig. 1, a vehicle seat 1 has a seat cushion 2; a backrest 3 attached to the seat cushion 2 in a backrest axis A, with a side bar (backrest side part) 5; and a rail system 4 for the longitudinal adjustment of the seat cushion 2 in the vehicle seat. The backrest 3 is in this case lockably and pivotably received on a recliner fitting 22, or backrest fitting 22, shown in Figs. 3 and 4. The seat cushion 2 is generally adjustable in height relative to the rail system 4, wherein the rail system is formed, for example, by lower rails, which are attached to the vehicle floor, and upper rails, which are mounted on the seat cushion and are longitudinally adjustable by means of a motorized longitudinal adjustment 47 indicated in Fig. 1.

[0031] Fig. 1 shows the vehicle seat 1 in its usage position or normal position, in which the backrest 3 is locked in a backrest lock with the recliner fitting 22 and can be pivoted in the locked position within an inclination adjustment range 35 shown in Fig. 7. In order to get into a rear seat row, 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 31, indicated in Fig. 1, which disengages the backrest lock, 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 frontmost position. The backrest axis A represents the folding axis and the pivot axis of the backrest, i.e., for both adjustments.

[0032] According to Figure 2, a two-pole micro switch unit 6, which is shown in more detail in Figures 5 and 6, is fastened, in particular screwed, to the inside of the side bar 5. The micro switch unit 6 has a housing 7, which is formed as an injection-molded part from a plastic material and comprises: [0033] one or more fastening holes 8 and one or more screw bosses 9 for fastening to the side barb, furthermore a cylindrical bearing 10 for a lever 12 and a spring 13, a micro switch latching receptacle 14 with two elastic latching tongues 18 for receiving a micro switch 15, and a plug receptacle 16 for receiving a plug housing 17. The elements 8, 9, 10, 14 and 16 are thus formed integrally in the housing 7 by injection molding.

[0034] In this case, the spring 13 and the lever 12 are accordingly placed in Fig. 6 from above onto the bearing 10. The micro switch 15 is likewise inserted in Fig. 6 from above into the micro switch latching receptacle 14 and latches there by means of the elastic latching tongues 18. The plug housing 17 is in particular inserted in Figure 6 in the longitudinal direction of the housing 7. The micro switch unit 6 formed in this way can subsequently be fastened to the side bar 5 via screws which are placed through the screw hole 8 and the screw bosses 9, whereupon an electrical plug is inserted into the plug housing 17 in order to contact and read out the micro switch unit 6.

[0035] Figure 4 shows the installation situation of the micro switch unit 6 and various folding positions of the backrest 3, wherein Fig. 42 corresponds to Fig. 3, Fig. 4b shows the initial folding, and the backrest 3 is folded forward and the micro switch unit 6 is unlocked in Fig. 4c. An electric motor (not shown here) is seated on a motor shaft 20 shown as a rectangular design and, upon actuation, rotates the motor shaft 20 in order to achieve a comfort adjustment of the backrest 3 relative to the recliner fitting 22 and thus to the seat cushion 2. The backrest 3 is mounted on the recliner fitting 22 and secured inward via a strike plate 24. A formed component 25 is placed onto and fastened to the strike plate 24. Assembly by attaching the formed component 25 to the strike plate 24 in the axial direction is thus enabled so that the formed component 25 is rigidly received on the recliner fitting 22. The formed component 25 has at least one formed curve 26. According to the embodiment shown here, the formed component 25 is designed in triple symmetry and can thus be equivalently installed in three receiving slots of the strike plate 24 in three angular positions offset by 120 degrees so that a poka-yoke principle is fulfilled and an incorrect installation of the formed component 25 on the strike plate 24 is avoided.

[0036] The micro switch unit 6 and the formed component 25 together form a switching apparatus 11 for detecting the forward-folding of the backrest 3 into the easy entry position: [0037] The lever 12 has a lever arm 28 projecting downward in the basic position of Figure 3 and Figure 4 a) and has, on its upper region, a cam surface 29 interacting with a switching tongue 30, designed, for example, as a sheet metal strip, of the micro switch 15, as described in particular with reference to Fig. 10. In Figs. 10 a) to d), the switching tongue 30 is in each case shown in all positions for illustrative purposes. In the basic position of Figure 3 and Figure 4 a), the lever arm 28 projects downward in its spring-biased basic position [0038] If the user unlocks the backrest lock, the user can fold the backrest 3 forward according to Figures 4b), c). In this folding movement, the backrest bar 5 thus pivots forward accordingly with the micro switch unit 6, i.e., in the clockwise direction in the figures, so that the lever arm 28 also pivots forward and arrives at the formed component 25 and its formed curve 26 so that the lever 12 pivots on the bearing 10 of the housing 7.

[0039] When the lever 12 is pivoted, according to Figs. 10 b) and 10 c), a run-on surface 45 of the cam surface 29, which has an increasing radius or distance to the lever axis of rotation, first arrives at the switching tongue 30 of the micro switch 15 so that the switching tongue 30 slides on the run-on surface 45 and is pressed upward against its spring bias so that it subsequently actuates a switch plunger 32 of the micro switch 15. Subsequently, the switching tongue 30 slides and rests on a contact surface 46 of the cam surface 29 of a constant radius and remains there in the easy entry position.

[0040] Figure 7 shows the adjustment ranges of the backrest 3: The locked backrest 3 is adjustable in inclination within its inclination adjustment range 35, which, for example, extends from a 0 degree basic position rearward to a rearmost position of -38 degrees, indicated by arrows in Fig. 7, and forward to a +18 degrees position, wherein in this inclination adjustment range 35 with a pivoting angle of a total of 18° + 38° = 56°, the lever arm 28 of the lever 12 does not arrive at the formed component 25. After actuation of the backrest unlocking 31, the backrest 3 can be folded forward and arrives in the activation range 36, which is formed, for example, from an adjustment angle of 21 degrees relative to the basic position or design position of zero degrees. The ranges 35 and 36 are thus sufficiently spaced apart from one another with an angular distance 37 of, for example, 3 degrees or even more, so that tolerances also do not lead to incorrect activation. The backrest 3 thus folds further forward and, according to Figure 7, arrives in the activation range 36, in which the micro switch 15 is actuated, and in the easy entry position provided, for example, at an angle of 42.5 degrees.

[0041] By activating the micro switch 15, a motorized longitudinal adjustment is activated, which adjusts the seat cushion 2 forward in the longitudinal direction on the rail system 4. After the user has sat down in the rear seat row, the user can directly fold the backrest 3 rearward so that the backrest bar 5 with the micro switch unit 6 in turn pivots rearward, and the lever 12 pivots back due to the spring bias of the spring 13, i.e., in turn arrives in front of the activation range 36 according to Figure 7 and releases the lever 12. As a result, the micro switch 15 is in turn released and returned from the actuated position into the unactuated position so that the longitudinal adjustment in turn adjusts the seat cushion 2 rearward on the rail system.

[0042] Figures 8 and 9 show a preferred electrical detection of the switching position of the micro switch 15. The switch plunger 32 adjusts a switching contact 40 against the spring bias thereof. In the basic position in the backrest 3, in which the micro switch 15 is unactuated, the electrical resistors R1 and R2 are connected in series and are read out as a total resistance R3, i.e., as a series connection, via connecting contacts 41. With resistance values of, for example, R1 = 750 ohms and R2 = 3920 ohms, a total resistance R3 = 4670 ohms is thus obtained. When the switch plunger 32 is actuated, the switching contact 40 is placed between the resistors R1 and R2 so that only the first resistor R1 is applied to the connecting contacts 41 and a total resistance R4 = R1 = 750 Ohm is detected by, for example, a control device 48 indicated here. These resistance values are far enough apart so that the switching position can be clearly detected. The control device 48 can thus control the motorized longitudinal adjustment 47.

[0043] Simple production with relatively few, inexpensively formable components and simple and reliable assembly are thus enabled. This initially results in greater tolerances between the formed component 25 and the lever 12 or lever arm 28. Due to the shaping of the formed curve 26 and the position of the lever arm 28, in which the lever 12 is pivoted with a high degree of reduction during the forward-folding according to Figures 4 a), 4 b) and 4 c), the large tolerances of the pivoting system of the backrest bar 5 with the micro switch unit 6 relative to the formed component 25 can be reduced into a pivoting operation within the micro switch unit 6. This pivoting operation of the lever 12 relative to the micro switch 15 takes place within the micro switch unit 6, i.e., two components received in the common housing 7 are adjusted relative to one another so that a pivoting operation of two components with low tolerances is enabled here.

LIST OF REFERENCE SIGNS

1 Vehicle seat 2 Seat cushion 3 Backrest 4 Rail system Backrest bar, backrest side part 6 Micro switch unit 7 Housing of the micro switch unit 8 Screw hole 9 Screw boss Bearing 11 Switching apparatus 12 Lever 13 Spring of the lever 12 14 Micro switch latching receptacle Micro switch 16 Plug receptacle for the plug housing 17 17 Plug housing 18 Elastic latching tongues Motor shaft 22 Backrest fitting, in particular recliner fitting, attached to the seat cushion 24 Strike plate of the backrest bearing 25 Formed component 26 Formed curve of the formed component 25 28 Lever arm of the lever 12 29 Cam surface Switching tongue of the micro switch 15 31 Unlocking handle 32 Switch plunger of the micro switch 15 Inclination adjustment range of the backrest 3 36 Activation range for the micro switch 15 37 Angular distance 40 Switching contact 41 Connecting contacts Run-on surface, adjustment surface of the cam surface 29 46 Contact surface of the cam surface 29 47 Motorized longitudinal adjustment 48 Control device A Backrest axis, both for inclination adjustment and folding R1, R2 Electrical resistors R3, R4 Total resistance

Claims

Claims 1. Vehicle seat (1) with easy entry adjustment, comprising: a longitudinally adjustable seat cushion (2), a backrest (3) which is foldably received on the seat cushion (2), locks on the seat cushion (2) via a backrest lock and, after unlocking the backrest lock, can be folded forward into an easy entry position, a switching apparatus (11) designed to detect a forward-folding of the backrest (3) and to output an electrical switching signal, characterized in that the switching apparatus (11) has a switch unit (6) fastened to the backrest (3) and has a formed component (25) fixedly provided relative to the seat cushion (2), wherein the switch unit (6) has a housing (7) attached to the backrest (3), a pivotable lever (12) mounted on or in the housing (7), and a switch (15) received on or in the housing (7), wherein the lever (12) has a lever arm (28) for adjustment by the formed component (25) and a cam surface (29) for actuating the switch (15), wherein when the backrest (3) is folded forward into the easy entry position, the lever arm (28) can be pivoted by the formed component (25) in such a way that the switch (15) can be actuated by the cam surface (29).
2. Vehicle seat (1) according to claim 1, characterized in that the switch unit (6) furthermore comprises a plug housing (17), which is received on or in the housing (7) and is electrically contacted with the switch (15), for external electrical contacting and for outputting the switching signal.
3. Vehicle seat (1) according to claim 1, characterized in that an unlocking device (31) to be actuated by the user is provided for unlocking the backrest lock, wherein the switch unit (6) is provided independently, in particular spatially separately, from the unlocking device (31) and/or the backrest lock.
4. Vehicle seat (1) according to claim 1, characterized in that the formed component (25) is fastened to a backrest fitting (22) attached to the seat cushion (2), in particular a recliner backrest fitting, and remains rigidly and/or non-adjustably on the backrest fitting (22) when the backrest (3) is folded.
5. Vehicle seat (1) according to claim 1, characterized in that the backrest (3) can be pivoted in an inclination adjustment range (35) when the backrest lock is locked, wherein a common backrest axis (A) is provided for the inclination adjustment and the easy entry folding operation, wherein the lever arm (28) is not adjustable by the formed component (25) during an inclination adjustment in the inclination adjustment range (35), and an activation range (36) of the backrest (3), in which the lever arm (28) can be pivoted by the formed component (25), is different from the inclination adjustment range (35) and is spaced apart by an angular distance (37).
6. Vehicle seat (1) according to claim 1, characterized in that one or more of the following elements are formed integrally, in particular integrally by injection molding, in the housing (7) of the switch unit (6): one or more screw holes (8) for fastening to the backrest (3), in particular a side bar (5) of the backrest (3), one or more screw bosses (9) for receiving fastening screws for fastening to the backrest (3), in particular a side bar (5) of the backrest (3), a switch latching receptacle (14) with one or more latching tongues (18) for receiving and positively engaging behind the micro switch (15), a bearing (10), in particular as a cylindrical bearing design, for pivotably mounting the lever (12) and/or a spring (13) for resetting the lever (12), a receptacle for the plug housing (17).
7. Vehicle seat (1) according to claim 1, characterized in that the switch (15) has a resiliently received switching tongue (30) and a switch plunger (32) which can be adjusted by the switching tongue (30), wherein the switching tongue (30) is designed to rest on the cam surface (29) of the lever (12) and to be adjusted by the cam surface (29) of the lever (12).
8. Vehicle seat (1) according to claim 7, characterized in that the cam surface (29) has a front run-on region (45) for actively adjusting the switching tongue (30) and an adjoining, substantially arcuate contact region (46) for receiving the switching tongue (30) in the easy entry position.
9. Vehicle seat (1) according to claim 1, characterized in that the switch (15) has a two-pole connection with two connecting contacts (41) for outputting the electrical switching signal as a resistance value, and the switch (15) forms different values of a total resistance (R3, R4) between the two connecting contacts (41) in its switching positions.
10. Vehicle seat (1) according to claim 9, characterized in that a series connection of at least two resistors (R1, R2) is provided in the switch (15) and can be connected differently to the two connecting contacts (41) in the two switching positions of the switch (15), in particular by bridging one (R2) of two resistors (R1, R2) in one of the switching positions.
11. Vehicle seat (1) according to claim 1, characterized in that the formed component (25) is placed onto and fastened to a strike plate (24) of a backrest bearing of the backrest (3).
12. Vehicle seat (1) according to claim 1, characterized in that the formed component (25) has a plurality of formed curves (26), e.g in radially protruding protrusions, wherein the plurality of formed curves (26) are each suitable for interacting with the lever arm (28), wherein only one of the plurality of formed curves (26) interacts with the lever arm (28) when the formed component (25) is attached to the backrest fitting (22) or the seat cushion (2), in particular as a rotationally symmetrical formation of the formed component (25) for selectively attaching in different rotational positions.
13. Vehicle seat (1) according to claim 1, characterized in that the formed component (25) is designed as a plate made of a plastic material or metal and has: the one or more formed curves (26), a central shaft receptacle for passing through a motor shaft (22), and fastening means, in particular fastening holes and/or screw bosses for receiving screws.
14. Vehicle seat (1) according to claim 1, 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), preferably with upper rails, forward in the longitudinal direction.
15. Vehicle seat (1) according to claim 1, characterized in that the switch unit (6) is attached to a door-side backrest bar (5) of the backrest (3).