Vehicle seat

Abstract

The present invention relates to a vehicle seat (100), comprising a seat part (102), a backrest (104), a kinematic system (110) for converting the vehicle seat (100) from a use position suitable for transporting a person to a non-use position and back, and a locking device, in particular a lock (120), for locking the kinematic system (110) in the use position, wherein the vehicle seat (100) can be converted from the use position to an access position when the locking device is unlocked, the kinematic system (110) can be coupled to a drive device (130) by means of a coupling device (150) in order to convert the vehicle seat (100) from the use position to the non-use position, and the coupling device (150) has an unlocking lever (172) for unlocking the locking device at least indirectly. In the use position of the vehicle seat (100), activation of the drive device (130) first produces a pivoting movement of the unlocking lever (172), and the kinematic system (110) can only be driven by the drive device (130) after the pivoting movement of the unlocking lever (172).

Description

Technical Field

[0001] The present invention relates to a vehicle seat, in particular a motor vehicle seat, having a seat part, having a backrest, having a kinematic mechanism for converting the vehicle seat from a use position in which the vehicle seat is adapted to transport a person to a non-use position and back again, and having a locking device, in particular a lock, for locking the kinematic mechanism in the use position, wherein, when the locking device has been unlocked, the vehicle seat can be converted from the use position to an access position, and wherein the kinematic mechanism for converting the vehicle seat from the use position to the non-use position can be coupled to a drive device by means of a coupling device. Background Art

[0002] DE102019133959A1 discloses a vehicle seat having a seat part, having a backrest, and having a kinematic mechanism for converting the vehicle seat from a use position in which the vehicle seat is suitable for transporting a person to an access position, in particular an access position facilitating access to a rear seat, wherein the vehicle seat can be converted from the use position to the access position by means of a drive device and vice versa, and wherein, for the drive conversion of the vehicle seat, the kinematic mechanisms of the drive device can be coupled to one another by means of a coupling device, and wherein, for manually converting the vehicle seat to the access position, the kinematic mechanism can be decoupled from the drive device by actuation of the coupling device. The coupling device has a coupling mechanism which is mounted such that it can pivot about a pivot axis. The coupling mechanism has a pawl operatively connected to a bolt and an unlocking lever interacting with the coupling mechanism. If actuation of the unlocking lever causes the coupling mechanism to be unlocked, then the pawl opens such that the bolt can be withdrawn from the coupling device. Summary of the Invention

[0003] Technical Problem

[0004] The problem solved by the present invention is to improve a vehicle seat of the type mentioned in the introduction, in particular to provide a vehicle seat for which at least one lock locking the kinematic mechanism can be opened by a drive device.

[0005] Solution

[0006] According to the invention, this problem is solved by a vehicle seat, in particular a motor vehicle seat, which has a seat part, a backrest, a kinematic mechanism for converting the vehicle seat from a use position in which the vehicle seat is adapted to transport a person to a non-use position and back again, and a locking device, in particular a lock, for locking the kinematic mechanism in the use position, wherein the vehicle seat can be converted from the use position to an access position when the locking device has been unlocked, and wherein the kinematic mechanism for converting the vehicle seat from the use position to the non-use position can be coupled to a drive device by means of a coupling device. The coupling device has an unlocking rocker for unlocking the locking device at least indirectly, wherein, in the use position of the vehicle seat, actuation of the drive device first causes the unlocking rocker to pivot, such that the locking device is unlocked. Only after the pivoting movement of the unlocking rocker can the kinematic mechanism be driven by the drive device to convert the vehicle seat to the non-use position. Since the coupling device has an unlocking rocker for unlocking the locking device at least indirectly, wherein, in the use position of the vehicle seat, activation of the drive device first causes the unlocking rocker to pivot, such that the locking device is unlocked, and only after the pivoting movement of the unlocking rocker can the kinematic mechanism be driven by the drive device to convert the vehicle seat to the non-use position, no additional actuator is required for unlocking the locking device.

[0007] The non-use position is in particular an access position which facilitates access to the rear seats and is also commonly referred to as an easy access position. In the access position, preferably the parts of the vehicle seat, in particular the backrest and the seat part, have pivoted forward to facilitate access to the rear seats. Here, the vehicle seat can also have a longitudinal adjuster which has at least two seat tracks and can be unlocked to assume the access position, such that the vehicle seat can be additionally pushed forward.

[0008] The vehicle seat can be a part of a multi-part bench which provides at least one seating position. The vehicle seat can be an undivided bench.

[0009] The seat part can be connected to the vehicle structure at least indirectly. The vehicle seat can be connected to at least one seat track of a longitudinal adjuster. The longitudinal adjuster can have a seat track and a floor track which can be displaced relative to the seat track, and the two tracks can be locked to each other to adjust the longitudinal seat position. The longitudinal adjuster can be a motor-driven longitudinal adjuster. The longitudinal adjuster can be unlocked to manually convert the vehicle seat to the access position. The unlocking operation of the longitudinal adjuster can be coupled to the actuation of the coupling device such that the longitudinal adjuster is unlocked when the coupling device is decoupled from the drive device.

[0010] The drive device can have an electric motor. The drive device can have a transmission.

[0011] The coupling device can have a coupling member that can be driven by a drive device; a coupling device that is connected to a component of a kinematic mechanism, in particular a rocker arm of a kinematic mechanism; and also a pawl for locking the coupling member to the coupling mechanism. The locking occurs in at least one direction. The pawl preferably locks the coupling member to the coupling mechanism in a direction corresponding to the non-use position of the vehicle seat.

[0012] The coupling mechanism can be designed in the form of a pawl support device on which the pawl is pivotally mounted. The unlocking rocker arm is preferably pivotally mounted on the coupling mechanism.

[0013] The coupling member can have a mating element. The mating element can be a bolt. The mating element can be a clip. The mating element can be a bent wire. The coupling mechanism can have a seat for receiving the mating element. The unlocking rocker arm preferably extends over the seat. The unlocking rocker arm can be pivoted by the movement of the mating element within the seat. The unlocking rocker arm can be operatively connected to the locking device by a Bowden cable. The pivoting movement of the unlocking rocker arm can be transmitted to the locking device via the Bowden cable in order to open the locking device.

[0014] The seat can be in the form of a groove. The open end of the groove can be closed by the pawl such that the mating element cannot exit from the seat. The base can have an end region. The end region can be arranged at the end of the seat oriented away from the open end of the seat. In order to convert the vehicle seat from the use position to the access position, it is the case that once the locking device has been unlocked, the drive device can pivot the mating element towards the end region such that as the operation proceeds, the mating element drives the coupling mechanism and thus the kinematic mechanism.

[0015] The pawl is preferably in the form of a clamping pawl. The clamping pawl can lock to the mating element outside the self-locking region. The clamping pawl preferably has a clamping curve portion for interacting with the mating element, in particular with a bolt or a clip, wherein the slope of the clamping curve portion is selected such that there is no self-locking region, however, under normal loads on the vehicle seat, the opening torque applied to the clamping pawl is less than the torque in the opposite direction generated by a prestressing spring, which torque urges the clamping pawl in the closing direction.

[0016] At least in the use position of the vehicle seat, the mating element can be arranged within the seat, between the unlocking rocker arm and the pawl. The movement of the mating element within the seat in the direction of the end region of the seat preferably results in first contact with the unlocking rocker arm and pivoting of the unlocking rocker arm before contact with the end region.

[0017] The movement of the mating element within the support in the direction of the pawl preferably results in contact with the pawl. During normal operation of the vehicle seat (during the conversion between the use position and the non-use position by means of the drive device), the pawl prevents the mating element from exiting the support. The pawl fixes the mating element in the support such that the mating element does not leave the support until a limiting force acting on the pawl has been reached. Only the pawl can fix the mating element so that it does not leave the support. The vehicle seat can be pivoted manually away from the use position into the non-use position, during which process the mating element exits the support.

[0018] A storage device, in particular a spring, can prestress the pawl in the direction of the position in which the pawl fixes the mating element in the support (outside the self-locking region). By means of an actuating force applied to the vehicle seat, in particular to the backrest, the pawl can withstand an opening torque via the mating element, where, as long as the opening torque is greater than the closing torque exerted by the storage device on the pawl, the pawl can pivot via the mating element into the release position. Description of the Drawings

[0019] The invention will be explained in more detail below with reference to three advantageous exemplary embodiments shown in the drawings. However, the invention is not limited to these exemplary embodiments. In the drawings:

[0020] Figure 1 : shows a side view of a first exemplary embodiment of a vehicle seat according to the invention in the use position,

[0021] Figure 2 : shows Figure 1 the vehicle seat in the access position in the

[0022] Figure 3 : shows in a highly schematic and detailed form Figure 1 the perspective view of the vehicle seat in the

[0023] Figure 4 : shows in detail Figure 1 the perspective view of the vehicle seat in the use position in the

[0024] Figure 5 : shows in detail Figure 1 the side view of the vehicle seat in the use position in the

[0025] Figure 6 : shows in detail Figure 1 the side view of the vehicle seat in the use position in the

[0026] Figure 7 : shows in detail Figure 1Side view of the drive and coupling devices of a vehicle seat in the use position,

[0027] Figure 8 : shown in detail Figure 1 The vehicle seat in is in the use position, and the unlocking rocker is shown in the initial angular position,

[0028] Figure 9 : shown in detail Figure 1 The vehicle seat in is starting to convert to the entry position, and the unlocking rocker is in the retracted angular position,

[0029] Figure 10 : shown in detail Figure 1 The vehicle seat in is in the entry position,

[0030] Figure 11 : shows corresponding to Figure 8 the illustration, where the pawl is in the position where the pawl support device is locked to the coupling member,

[0031] Figure 12 : shown in detail Figure 1 The vehicle seat in is in the process of being manually converted to the entry position, where the pawl is open,

[0032] Figure 13 : Side view showing in detail a second exemplary embodiment of a vehicle seat according to the present invention,

[0033] Figure 14 : shown in detail Figure 13 Side view of the vehicle seat in the use position, with the unlocking rocker shown in the initial angular position,

[0034] Figure 15 : shown in detail Figure 13 Side view of the vehicle seat in the process of starting to convert to the entry position, with the unlocking rocker in the retracted angular position,

[0035] Figure 16 : Perspective view showing in detail a third exemplary embodiment of a vehicle seat in the use position,

[0036] Figure 17 : shown in detail Figure 16 Side view of the vehicle seat in the use position,

[0037] Figure 18 : shown in detail Figure 16 Side view of the vehicle seat in the use position,

[0038] Figure 19 : shown in detail Figure 16Side view of the drive device and coupling device of the vehicle seat in the use position,

[0039] Figure 20 shown in detail; Figure 16 the vehicle seat in the use position, the unlocking rocker arm shown in the initial angular position,

[0040] Figure 21 shown in detail; Figure 16 the vehicle seat starting to convert to the entry position, the unlocking rocker arm in the retracted angular position,

[0041] Figure 22 shown in detail; Figure 16 the vehicle seat in the entry position,

[0042] Figure 23 showing corresponding to Figure 20 the illustration, the pawl in the position where the pawl support device is locked to the coupling member, and

[0043] Figure 24 shown in detail; Figure 16 the vehicle seat during manual conversion to the entry position, where the pawl is open. DETAILED DESCRIPTION

[0044] The present invention will be described in more detail with reference to three exemplary embodiments of vehicle seats 100; 200; 300 according to the present invention, wherein three-digit reference numerals starting with the digit 1 are assigned to the first exemplary embodiment, three-digit reference numerals starting with the digit 2 are assigned to the second exemplary embodiment, and three-digit reference numerals starting with the digit 3 are assigned to the third exemplary embodiment.

[0045] The vehicle seats 100; 200; 300 schematically shown in the drawings will be described below using three directions that extend perpendicular to each other in space. For the vehicle seats 100; 200; 300 installed in a vehicle, the longitudinal direction x extends substantially horizontally and preferably parallel to the longitudinal direction of the vehicle, and the longitudinal direction of the vehicle corresponds to the normal driving direction of the vehicle. The transverse direction y, which extends perpendicular to the longitudinal direction x, is also horizontally oriented in the vehicle and extends parallel to the transverse direction of the vehicle. The vertical direction z extends perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. For the vehicle seats 100; 200; 300 installed in a vehicle, the vertical direction z extends parallel to the vertical axis of the vehicle.

[0046] The information given regarding position and orientation, such as forward / front, backward, upward, and downward, relates to the viewing direction of an occupant sitting in vehicle seats 100; 200; 300 in the normal seating position, where the vehicle seats 100; 200; 300 are installed in a position in the vehicle suitable for transporting persons, and the backrests 104; 304 are upright and oriented in the conventional travel direction.

[0047] Vehicle seats 100; 200; 300, for example, in the form of outer seats of a central or rear seat in a motor vehicle such as a van, each having a seat part 102; 202; 302 and a backrest 104; 304. The backrests 104; 304 can be adjusted in their inclination about a backrest pivot axis L by means of at least one fitting 106 (in this case two fittings 106), respectively, thus defining a plurality of use positions. The term seat part 102; 202; 302 is intended to be understood as an integral assembly having a seat part structure 102a; 202a; 302a and a soft seat cushion. If components are hinged to the seat part 102; 202; 302, then these are understood to be hinged to the seat part structures 102a; 202a; 302a of the seat part 102; 202; 302. This also applies to the backrests 104; 304.

[0048] For the sake of simplicity, only one side of the vehicle seats 100; 200; 300, which are always substantially symmetric, will be described hereinafter, that is, unless otherwise described, in each case there are two (possibly in mirror-symmetric form) of the components mentioned hereinafter.

[0049] The following will refer to Figures 1 to 12 describe the vehicle seat 100 of the first exemplary embodiment.

[0050] Figure 1 The vehicle seat 100 is shown in a specific use position, namely the design position, in which the backrest 104 is inclined backward relative to the vertical direction by, for example, 23°.

[0051] The base of the vehicle seat 100 can be connected to a structural member of a motor vehicle. The base here is configured in the form of a longitudinal adjuster 108, which enables the longitudinal adjustment of the vehicle seat 100. The base here has a floor rail 108b, which can be directly connected to the vehicle structure, and a seat rail 108a, which is connected to the seat part 102 and can be displaced relative to the floor rail 108b in the longitudinal direction x. These two profiled rails 108a, 108b engage alternately one after the other by means of their inwardly and outwardly angled longitudinal edges. The longitudinal adjuster 108 can preferably be displaced in a known manner by a spindle drive to any desired longitudinal adjustment position within a predetermined adjustment range. As an alternative, a longitudinal adjuster can be provided, the rails 108a, 108b of which can be locked to each other by a track locking mechanism known per se, wherein the track locking mechanism can be manually unlocked by the occupant of the vehicle seat 1 using a known unlocking clip, and when the track locking mechanism has been unlocked, the longitudinal adjustment position can be manually changed by the vehicle occupant.

[0052] The front foot 112 is mounted on the base. In this case, the front foot 112 is fixed to the seat rail 108a. As an alternative, the front foot 112 can also be locked to the seat rail 108a in a releasable manner.

[0053] The seat part 102 is articulated to the front end region of the front foot 112 by means of a rocker arm 114. The rocker arm 114 has two ends. In the region of each of these two ends, a swivel joint is provided. The first swivel joint I forms the mechanism for articulating the rocker arm 114 to the front foot 112. The second swivel joint II forms the mechanism for articulating the rocker arm 114 to the front end of the seat part 102. The rocker arm 114 on the left side of the vehicle seat can be connected to the rocker arm 114 on the right side of the vehicle seat via a transverse connecting member, in particular a cross tube.

[0054] The seat part 102 is also articulated to the front foot 112 by means of a connecting rod 116 arranged behind the rocker arm 114. The connecting rod 116 has two ends, and in the region of each of these two ends, a swivel joint is respectively provided. The third swivel joint III forms the mechanism for articulating the connecting rod 116 to the front foot 112. The fourth swivel joint IV forms the mechanism for articulating the connecting rod 116 to the seat part 102. Exactly one such connecting rod 116 is correspondingly arranged on both sides of the vehicle seat 100.

[0055] The front foot 112, the rocker arm 114, the connecting rod 116 and the seat part 102 form a kinematic mechanism 110, in particular a four-joint mechanism. The vehicle seat 100 can be moved along a predetermined movement path from the use position to the axis position shown in Figure 2 and back again by means of the four-joint mechanism.

[0056] On the base, in the present case on the seat track 108a of the longitudinal adjuster 108, it is also the case that the rear feet 118, which are formed separately from the front feet 112, are arranged behind the front feet 112, as seen in the longitudinal direction x. The rear feet 118 on the left side of the vehicle seat are connected via a transverse connecting member to the rear feet 118 on the right side of the vehicle seat. The rear feet 118 can be releasably locked to the base by a lock 120 fastened to the rear feet 118, more precisely, it can be locked to a locking element 121 mounted on the base. In the present example, the locking element is fastened to the seat track 108a. The rear feet 118 can thus be indirectly connected to the vehicle structure. The locking element 121 is, for example, a bolt or a clip.

[0057] In the state where the locking element is blocked by the lock 120, the locking element 121 is in the center of the slot-shaped receiving opening of the rear feet 118, or alternatively, in the center of the slot-shaped receiving opening of the housing of the lock 120, and is prevented from leaving the receiving opening by the rotary latch of the lock 120. In the use position of the vehicle seat 100, the receiving opening and the pawl of the lock 120 fix the rear feet 118 relative to the base.

[0058] The drive device 130 and the coupling device 150 are arranged in the region of one of the two rocker arms 114, for example, in the region of the left rocker arm 114. For reasons of illustration, the coupling device 150 is Figure 1 and Figure 2 invisible. The structure and function of the coupling device 150 will be specifically described below with reference to Figures 4 to 12 this.

[0059] It is not necessarily the case that more than one drive device 130 and one coupling device 150 are provided, and in this case they are not necessarily arranged symmetrically with respect to the central plane of the vehicle seat 100. Depending on the installation of the vehicle seat 100 in the vehicle, the drive device 130 and the coupling device 150 can be selectively arranged on the left or right side of the vehicle seat.

[0060] The vehicle seat 100 does not require any additional mechanical or electromechanical actuators in order to unlock the lock 120 of the rear feet 118 before the vehicle seat 100 can be pivoted from the use position to the access position by the kinematic mechanism 110. The lock 120 is unlocked by the interaction of the drive device 130 and the coupling device 150.

[0061] The drive device 130 has a motor 130a. The drive device 130 also has a transmission 130b connected to the motor 130a and has a main shaft 132. The main shaft 132, which can be driven by the motor 130a to rotate about the main shaft axis S, is arranged on the output side of the transmission 130b. The motor 130a is preferably held in a support in relation to the front foot 112 on the base of the vehicle seat 1. Since the main shaft 132 rotates about the main shaft axis S, the main shaft nut 134 held in the connecting member 136 can move along the main shaft 132 in the axial direction of the main shaft 132. When the main shaft 132 rotates, the main shaft nut 134 moves translationally along the main shaft 132. The connecting member 136 is pivotally connected to the coupling device 150, in particular by means of a connecting bolt.

[0062] The coupling device 150 has a coupling member 164. The coupling member 164 is mounted on the front foot such that it can pivot about the support bolt 180. The support bolt 180 is aligned with the first rotary joint I. The coupling member 164 has a bolt 166. The bolt 166 is preferably welded to the coupling member 164.

[0063] In addition to the coupling member 164, the coupling device 150 also includes a pawl 162, which is designed in the form of a clamping pawl and is mounted on a coupling mechanism designed in the form of a pawl support device 170 such that it can pivot about the support bolt 162a. The pawl support device 170 is fixed to the rocker arm 114, preferably screwed to the rocker arm 114. For this purpose, the pawl support device 170 has two through holes 170a for screws.

[0064] The pawl support device 170 has a pawl 162, an unlocking rocker arm 172 and a support 174. The unlocking rocker arm 172 has a control profile 172a and an interface portion 172b. One end of the Bowden cable 173 is fastened to the interface portion 172b, preferably fitted to the interface portion 172b. The other end of the Bowden cable 173 is fastened to one of the locks 120 on the rear foot 118 such that pivoting of the unlocking rocker arm 172 causes the lock 120 to be unlocked.

[0065] The support 174 is for receiving the bolt 166 of the coupling member 164. The support 174 is a slot with one end open in the support plate 176 of the pawl support device 170. The unlocking rocker arm 172 is pivotally mounted on the support plate 176. The control profile 172a of the unlocking rocker arm 172 extends over the support 174 such that displacement of the bolt 166 in the support 174 in the direction of the closed end region 174a of the support 174 causes the unlocking rocker arm 172 to pivot from the initial angular position to the displaced angular position.

[0066] During the displacement of the bolt 166 in the support 174 in the direction of the closed end region 174a, the control contour 172a of the unlocking rocker 172 slides along the bolt 166, so that the unlocking rocker 172 pivots and the lock 120 of the rear foot 118 opens. Due to the displacement of the engaging element 166 in the support 174 in the direction of the end region 174a of the support 174, the engaging element 166 pivots the control contour 172a of the unlocking rocker 172 downward.

[0067] Until the pawl 162 is subjected to a limit force defined by the spring 163, the pawl 162 can lock the bolt 166 so that it does not withdraw from the support 174. As in the exemplary embodiment described above, the pawl 162 is a clamping pawl.

[0068] In the vehicle seat 100's in-use position, the bolt 166 is located within the support 174, at a distance from the end region 174a of the support 174. Activation of the drive device 130 causes the coupling member 164 to pivot, resulting in the bolt 166 initially moving as far as the end region 174a of the support 174 without pivoting the pawl support 170. Thus, initially, the kinematic mechanism 110 remains inactive, but the pivoting of the unlocking rocker 172 unlocks the lock 120, thereby releasing the rear foot 118 from the seat track 108a. As the operation proceeds, the bolt 166 abuts the end region 174a, moving the pawl support 170 along with it, causing the rocker arm 114 of the kinematic mechanism 110 to pivot, thereby shifting the vehicle seat into the entry position.

[0069] To shift vehicle seat 100 back from the entry position to the use position, drive device 130 pivots coupling member 164 in the corresponding direction after idle tension. After idle tension within support 174, bolt 166 reaches pawl 162. As the operation progresses, bolt 166 acts on pawl 162, driving pawl support 170 and, consequently, pivoting rocker arm 114 of kinematic mechanism 110, ultimately shifting vehicle seat 100 to the use position. If the force exerted by bolt 166 on pawl 162 exceeds a limit, pawl 162, designed to clamp, opens.

[0070] The pawl 162 is prestressed by the spring 163 in the direction of its locking position with respect to the bolt 166. The pawl 162 is formed outside the self-locking region. Under load, the bolt 166 exerts an opening torque on the pawl 162. The force of the spring 163 counteracts this opening torque by the locking action until the opening torque is greater than the counter-torque generated by the force of the spring 163. In particular, the opening torque can be achieved by applying a force manually to the upper edge region of the backrest 102. If the torque exerted by the bolt 166 on the pawl 162 exceeds the counter-torque, then the pawl opens and releases the bolt 166. In the open state of the pawl 162, the coupling member 164 can pivot relative to the rocker arm 114 such that the rocker arm 114 can pivot independently of the coupling member 164. Thus, a manual conversion of the vehicle seat 100 to the entry position can be performed, especially for an emergency evacuation from a row of seats behind the vehicle seat 100.

[0071] Figure 3 A Bowden cable device 190 for synchronously unlocking two locks 120 by means of an operating lever 196 is shown. For a manual conversion of the vehicle seat 100 to the entry position, since a force is applied to the backrest 102, the locks 120 must be unlocked before the pawl 162 opens.

[0072] The Bowden cable device 190 includes a first Bowden cable 192, a second Bowden cable 194, and an operating lever 196. The two locks 120 can be unlocked synchronously with each other by the first Bowden cable 192. The second Bowden cable 194 connects the operating lever 196 to one of the two locks 120. Since the operating lever 196 is actuated, the two locks 120 can be unlocked synchronously via the Bowden cables 192, 194. The Bowden cable device 190 serves to provide an emergency exit by being manually unlockable via the locks 120. Thus, the above-described electromechanical drive device 130 does not need to be powered for the purpose of an emergency evacuation.

[0073] In a variant of the exemplary embodiment not shown in the drawings, for manually unlocking the two locks 120, the operating lever 196 is replaced by two pull tabs, especially made of textile tape. The first pull tab is guided backward and is especially used for unlocking the two locks 120 by a person sitting on another row of seats behind the vehicle seat 100. The second pull tab is guided forward and is especially used for unlocking the two locks 120 from the front by a person located next to or in front of the vehicle seat 100.

[0074] Figures 13 to 15A second exemplary embodiment of a vehicle seat 200 according to the present invention is described, which corresponds to the vehicle seat 100 described above unless otherwise stated hereinafter. Identical or equivalent components are denoted by reference numerals increased by the value 100. Thus, the vehicle seat of the second exemplary embodiment is denoted, for example, by the reference numeral 200 (vehicle seat 200), which is increased by the value 100 with respect to the vehicle seat 100 of the first exemplary embodiment. If a component of the second exemplary embodiment is not described hereinafter but is shown in the drawings, then the description of the corresponding component of the first exemplary embodiment applies.

[0075] The vehicle seat 200 differs from the above-described vehicle seat 100 specifically in that the unlocking rocker 272 has an unlocking rotation direction opposite to the unlocking rotation direction of the first exemplary embodiment. As a result, the Bowden cable 273 can withstand a tension acting in a direction opposite to that of the first exemplary embodiment. The changed unlocking rotation direction is achieved by a correspondingly changed control profile 272a. The movement of the engaging element 266 in the direction of the end region 274a of the support 274 within the support 274 causes the engaging element 266 to pivot the control profile 272a of the unlocking rocker 272 upward.

[0076] In the second exemplary embodiment, the engaging element 266 for interacting with the unlocking rocker 272 and the pawl 262 is designed in the form of a clip.

[0077] Figures 16 to 24 A third exemplary embodiment of a vehicle seat 300 according to the present invention is described, which corresponds to the vehicle seat 100 described above unless otherwise stated hereinafter. Identical or equivalent components are denoted by reference numerals increased by the value 200. Thus, the vehicle seat of the third exemplary embodiment is denoted, for example, by the reference numeral 300 (vehicle seat 300), which is increased by the value 200 with respect to the vehicle seat 100 of the first exemplary embodiment. If a component of the third exemplary embodiment is not described hereinafter but is shown in the drawings, then the description of the corresponding component of the first exemplary embodiment applies.

[0078] The vehicle seat 300 differs from the above-described vehicle seat 100, in particular by a differently designed drive device 330 and also a differently designed coupling member 364.

[0079] The drive device 330 has a motor 330a. The drive device 330 also has a transmission 330b connected to the motor 330a. The transmission 330b has a pinion 331 on the output side. Such a drive device 330 is known, for example, from DE19709852C2.

[0080] The coupling member 364 has a toothed section 364a that meshes in a toothed manner with the pinion 331. Rotation of the pinion 331 causes the coupling member 364 to pivot about a rotation axis defined by the first rotary joint.

[0081] In other respects, the structure and function of the vehicle seat 300 correspond to those of the above-described vehicle seat 100 of the first exemplary embodiment.

[0082] List of reference numerals

[0083] 100; 200; 300 Vehicle seats

[0084] 102; 202; 302 Seat components

[0085] 102a; 202a; 302a Seat component structures

[0086] 104; 304 Backrests

[0087] 106 Fittings

[0088] 108 Longitudinal adjusters

[0089] 108a Seat tracks

[0090] 108b Floor tracks

[0091] 110; 210; 310 Kinematic mechanisms

[0092] 112; 212; 312 Front legs

[0093] 114; 214; 314 Rocker arms

[0094] 116 Linkages

[0095] 118; 318 Rear legs

[0096] 120; 320 Locks

[0097] 121; 321 Locking elements

[0098] 130; 230; 330 Drive devices

[0099] 331 Pinions

[0100] 130a; 230a; 330a Motors

[0101] 130b; 230b; 330b Transmissions

[0102] 132; 232; 332 Main shafts

[0103] 134; 234; 334 Main shaft nuts

[0104] 136; 236; 336 Connecting members

[0105] 150; 250; 350 Coupling device

[0106] 162; 262; 362 Pawl

[0107] 163; 263; 363 Spring

[0108] 164; 264; 364 Coupling member

[0109] 364a Toothed section

[0110] 166; 266; 366 Fitting element, bolt, clip

[0111] 170; 270; 370 Coupling mechanism, pawl support device

[0112] 172; 272; 372 Unlocking rocker

[0113] 172a; 272a; 372a Control profile

[0114] 172b; 272b; 372b Interface section

[0115] 173; 273; 373 Bowden cable

[0116] 174; 274; 374 Support

[0117] 174a; 274a; 374a End region

[0118] 176; 276; 376 Support plate

[0119] 180; 280; 380 Support bolt

[0120] 190 Bowden cable device

[0121] 192 First Bowden cable

[0122] 194 Second Bowden cable

[0123] 196 Operating lever

[0124] I First rotary joint

[0125] II Second rotary joint

[0126] III Third rotary joint

[0127] IV Fourth rotary joint

[0128] L Backrest pivot axis

[0129] S Spindle axis

[0130] x Longitudinal direction

[0131] y lateral direction

[0132] z vertical direction

Claims

1. A vehicle seat (100; 200; 300), comprising: a seat part (102; 202; 302), a backrest (104; 304), a kinematic mechanism (110; 210; 310) for converting the vehicle seat (100; 200; 300) from a use position suitable for transporting a person to a non-use position and back again, a locking device for locking the kinematic mechanism (110; 210; 310) in the use position, and a coupling device (150; 250; 350), Among them, when the locking device has been unlocked, the vehicle seat (100; 200; 300) can be converted from the use position to the non-use position, wherein, in order to convert the vehicle seat (i00; 200; 300) from the use position to the non-use position, the kinematic mechanism (110; 210; 310) can be coupled to a drive device (130; 230; 330) via the coupling device (150; 250; 350), characterized in that the coupling device (150; 250; 350) has an unlocking rocker (172; 272; 372) for unlocking the locking device at least indirectly, wherein, in the use position of the vehicle seat (100; 200; 300), activation of the drive device (130; 230; 330) first causes the unlocking rocker (172; 272; 372) to pivot, so that the locking device is unlocked, and only after the pivoting movement of the unlocking rocker (172; 272; 372) can the kinematic mechanism (110; 210; 310) be driven by the drive device (130; 230; 330) in order to convert the vehicle seat (100; 200; 300) to the non-use position.

2. The vehicle seat (100; 200; 300) according to claim 1, characterized in that, The coupling device (150; 250; 350) has a coupling member (164; 264; 364) that can be driven by the drive device (130; 230; 330); a coupling mechanism (170; 270; 370) that is connected to a component of the kinematic mechanism (110; 210; 310); and also a pawl (162; 262; 362) for locking the coupling member (164; 264; 364) to the coupling mechanism (170; 270; 370) in at least one direction.

3. The vehicle seat (100; 200; 300) according to claim 2, characterized in that, The component of the kinematic mechanism (110; 210; 310) to which the coupling mechanism (170; 270; 370) is connected is the rocker arm (114; 214; 314) of the kinematic mechanism (110; 210; 310).

4. The vehicle seat (100; 200; 300) according to claim 2, characterized in that, The coupling mechanism (170; 270; 370) is designed in the form of a pawl support device, and the pawl (162; 262; 362) is pivotally mounted on the pawl support device.

5. The vehicle seat (100; 200; 300) according to any one of claims 2 to 4, characterized in that, The unlocking rocker (172; 272; 372) is pivotally mounted on the coupling mechanism (170; 270; 370).

6. The vehicle seat (100; 200; 300) according to any one of claims 2 to 4, characterized in that, The pawl (162; 262; 362) is designed in the form of a clamping pawl.

7. The vehicle seat (100; 200; 300) according to claim 2, characterized in that, The coupling mechanism (170; 270; 370) has a support (174; 274; 374) for receiving the mating element of the coupling member (164; 264; 364).

8. The vehicle seat (100; 200; 300) according to claim 7, characterized in that, The mating element is a bolt (166; 366) or a clip (266).

9. The vehicle seat (100; 200; 300) according to claim 7, characterized in that, The unlocking rocker arm (172; 272; 372) extends over the support (174; 274; 374), and the unlocking rocker arm (172; 272; 372) can pivot by the movement of the mating element (166; 266; 366) within the support (174; 274; 374).

10. The vehicle seat (100; 200; 300) according to any one of claims 7 to 9, characterized in that, The support (174; 274; 374) has an end region (174a; 274a; 374a), wherein, in order to convert the vehicle seat (100; 200; 300) from the use position to the non-use position, once the locking device has been unlocked, the drive device (130; 230; 330) pivots the mating element (166; 266; 366) towards the end region (174a; 274a; 374a), and as the operation progresses, the mating element (166; 266; 366) drives the coupling mechanism (170; 270; 370) and thus drives the kinematic mechanism (110; 210; 310).

11. The vehicle seat (100; 200; 300) according to any one of claims 7 to 9, characterized in that, At least in the use position of the vehicle seat (100; 200; 300), the mating element (166; 266; 366) is arranged within the support (174; 274; 374), between the unlocking rocker arm (172; 272; 372) and the pawl (162; 262; 362).

12. The vehicle seat (100; 200; 300) according to any one of claims 7 to 9, characterized in that, The pawl (162; 262; 362) fixes the mating element (166; 266; 366) in the support (174; 274; 374) so that it does not leave the support (174; 274; 374).

13. The vehicle seat (100; 200; 300) according to any one of claims 7 to 9, characterized in that, The pawl (162; 262; 362) fixes the mating element (166; 266; 366) in the support (174; 274; 374) such that the mating element does not leave the support (174; 274; 374) until a limit force acting on the pawl (162; 262; 362) has been reached.

14. The vehicle seat (100; 200; 300) according to any one of claims 7 to 9, characterized in that, Only the pawl (162; 262; 362) can fix the mating element (166; 266; 366) so that it does not leave the support (174; 274; 374).

15. The vehicle seat (100; 200; 300) according to any one of claims 7 to 9, characterized in that, The energy storage device prestresses the pawl (162; 262; 362) in the direction of the position where the pawl (162; 262; 362) fixes the mating element (166; 266; 366) in the support (174; 274; 374) outside the self-locking region.

16. The vehicle seat (100; 200; 300) according to claim 15, characterized in that, The energy storage device is a spring (163; 263; 363).

17. The vehicle seat (100; 200; 300) according to claim 15, characterized in that, By means of an actuating force applied to the vehicle seat (100; 200; 300), the pawl (162; 262; 362) can withstand an opening torque via the engagement element (166; 266; 366), wherein when the opening torque is greater than the closing torque applied by the energy storage device to the pawl (162; 262; 362), the pawl (162; 262; 362) can pivot to the release position via the engagement element (166; 266; 366).

18. The vehicle seat (100; 200; 300) according to claim 17, characterized in that, By means of an actuating force applied to the backrest (104; 304), the pawl (162; 262; 362) can withstand an opening torque via the engagement element (166; 266; 366).

19. The vehicle seat (100; 200; 300) according to claim 17, characterized in that, In the release position of the pawl (162; 262; 362), the vehicle seat (100; 200; 300) can be manually pivoted from the use position to the non-use position, wherein the engagement element (166; 266; 366) disengages from the support (174; 274; 374).

20. The vehicle seat (100; 200; 300) according to any one of claims 1 to 4, characterized in that, The locking device is a lock (120; 320).

21. The vehicle seat (100; 200; 300) according to any one of claims 1 to 4, which is a motor vehicle seat.

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