WO2017216053A1

WO2017216053A1 - Longitudinal adjuster for a vehicle seat, and vehicle seat

Info

Publication number: WO2017216053A1
Application number: PCT/EP2017/064103
Authority: WO
Inventors: Piotr Mizerski; Karl Utzinger
Original assignee: Adient Luxembourg Holding S.à.r.l.
Priority date: 2016-06-17
Filing date: 2017-06-09
Publication date: 2017-12-21
Also published as: DE102016210905A1

Abstract

The invention relates to a longitudinal adjuster (10) for a vehicle seat (1), in particular a motor vehicle seat, comprising a seat part (3) and a backrest (5). The longitudinal adjuster (10) comprises an upper rail (12) and a lower rail (14), the upper rail (12) can move relative to the lower rail (14) in a longitudinal direction (x). The device also comprises a memory device (20) associated with the upper rail (12) and interacting with the lower rail (14), the memory device (20) detects a relative movement, from a longitudinal position of the seat defined as a memorised position, between the upper rail (12) and the lower rail (14), by means of a friction wheel (22) which comes into contact with a contact surface (14a) that can be moved with respect to the memory device (20) and which moves along said contact surface. The friction wheel (22) drives, during the relative movement, a mechanism (42) of the memory device (20), said mechanism (42) can be blocked when the memorised position has been reestablished. A rolling movement of the friction wheel (22) along the contact surface (14a) of the lower rail (14) can be slowed down for stopping a movement of the upper rail (12) relative to the lower rail (14) in the direction of the memorised position and a movement of the upper rail (12) over the memorised position is also prevented. The invention also relates to a vehicle sear (1) comprising a seat part (3), a backrest (5) and a longitudinal adjuster (10) connected to the seat part (3).

Description

Adient Holding Luxembourg S.à.r.l.

LENGTHER FOR A VEHICLE SEAT AND VEHICLE SEAT

The invention relates to a longitudinal adjuster with the features of the preamble of claim 1 and a vehicle seat.

State of the art

In the prior art, various easy-entry systems are known which allow easier entry into a second row of seats of a vehicle. The easy-entry system is actuated by an unlocking lever, which is usually arranged on a backrest of the vehicle seat, whereby the backrest of the vehicle seat pivots out of an access area. If the vehicle seat is arranged on rails, the vehicle seat may additionally or alternatively be in the direction of travel when the unlocking lever is actuated

Sliding out entry area.

In a manner known per se, an easy-entry adjustment device for a vehicle seat allows an adjustability of the vehicle seat between a vehicle seat

Use position and an easy-entry position. Such adjustability is especially advantageous for vehicles that have only one door per side of the vehicle. When transferring the vehicle seat from the

Use position in the easy-entry position, both a backrest fitting of the adjustment device, as well as a seat longitudinal locking of the adjustment device is achieved. The release of the backrest fitting allows pivoting of the seat back of the vehicle seat forward in the direction of a seat portion of the vehicle seat, while the release of the seat longitudinal locking allows advancement of the entire vehicle seat in the direction of travel. A vehicle occupant thus gains access to the rear seats of the vehicle. From DE 102 02 179 A1 and WO 2016/162280 A1 a generic longitudinal adjuster for a vehicle seat is generally known, which has a memory device for detecting a relative seat longitudinal displacement. The memory device is here in an inner, between a first

Seat rail and a second seat rail formed, space arranged and connected to the first seat rail. The memory device has a engageable with the second seat rail locking element, which in the case of

Actuation of the blocking function initiates all forces acting on the blocking element forces in the memory device. To stop the vehicle seat is the

Locking element engaged in a hole pattern of the lower rail or engaged in a fastened to the lower rail component, which has a hole pattern brought.

There are also memory devices are known in which a displaceable in the lower rail in the longitudinal direction consisting of several components

Stop element is guided, which is stored at a resumable position in the lower rail. Either the stop element engages directly into

Hole pattern of the bottom rail, or it engages in with the bottom rail

connected, provided with a hole pattern additional component. The vehicle seat can thus be stopped by abutting and supporting it at this stop element, which is deposited on the position to be taken again.

task

The invention is based on the object to improve a longitudinal adjuster of the type mentioned, in particular a longitudinal adjuster with an arranged outside the seat rail pair memory device

to provide, which does not act on a arranged within the seat rail pair locking, and to provide a corresponding vehicle seat. solution

This object is achieved by a longitudinal adjuster for a seat part and a back having vehicle seat, in particular one

Motor vehicle seat, wherein the longitudinal adjuster an upper rail and a

Lower rail, wherein the upper rail is displaceable relative to the lower rail in a longitudinal direction, wherein one of the upper rail associated and cooperating with the lower rail memory device is provided, wherein the memory device one of a designated as a memory position

Seat longitudinal position outgoing relative movement between the upper rail and the lower rail detected by means of a friction wheel, which is a relative to

Memory device contacted and moved away movable contact surface, wherein the friction wheel during the relative movement drives a transmission of the memory device, wherein the transmission is blocked at a re-reaching the memory position, whereby a rolling movement of the friction wheel along the

Contact surface of the lower rail is braked such that a displacement of the upper rail is stopped relative to the lower rail in the direction of the memory position and a displacement of the upper rail on the memory position is also prevented.

Due to the fact that the transmission can be blocked when the memory position is reached again, as a result of which a rolling movement of the friction wheel along the

Contact surface of the lower rail is braked such that, in particular due to the friction between the friction wheel and lower rail, a displacement of the upper rail relative to the lower rail stopped in the direction of the memory position and a

Moving the upper rail beyond the memory position is prevented, it is possible to dispense with the use of a usually arranged within the enclosed by the upper rail and lower rail cavity and actuated by the memory device additional locking device. Consequently, there is no need to pass levers or links through one

corresponding passage opening in the upper rail, whereby this is not impaired by the passage opening in their stability and resilience. Furthermore, the memory position is independent of one by one Absetzverriegelung predetermined increment in almost every possible seat longitudinal position adjustable, and is also independent of an increment of the rail lock. Advantageous embodiments, which can be used individually or in combination with each other, are the subject of the dependent claims.

The friction wheel may further rotatable about a Reibradachse in a to a

Swingarm be mounted pivoting Reibradschwinge. Here, the Reibradschwinge may be spring-loaded in particular in the direction of the contact surface of the lower rail, in particular by generating a contact force between the friction wheel and the contact surface. This makes it possible that the friction wheel is subjected to a sufficient contact force to prevent slippage during the detection of the relative movement of the upper rail to the lower rail.

Further, it may be provided that in the case of manual adjustment of a deviating from the current seat longitudinal position seat longitudinal position while a rail lock is unlocked manually, the friction wheel by means of a on the

Reibradschwinge acting mechanism can be lifted from the contact surface, so that no detection of a relative movement of the upper rail to the lower rail during adjustment of the new seat longitudinal position or stored in the memory device relative movement can be reset to a zero value. A reset of a stored relative movement can be assisted in particular by means of a spring element acting on the friction wheel and / or the gear, in particular a so-called return spring. Such a mechanism is known for example from DE 10 2015 221 073 A1, the relevant disclosure of which is expressly incorporated.

Furthermore, provision may be made for the friction wheel axis to be arranged behind the rocker axis viewed in the longitudinal direction. This means that during a displacement of the vehicle seat forward in an easy-entry position, the friction wheel is pulled relative to the direction of movement, while at a displacement of the vehicle seat is pushed back into the position of use at the previous seat longitudinal position relative to the direction of movement in advance.

Furthermore, the Reibradachse may have a smaller distance from the contact surface than the swing axle. This has the consequence that the Reibradschwinge viewed from the swinging axis of view is inclined in the direction of the contact surface of the lower rail, whereby the advantage is allowed that the friction wheel at a

Moving the vehicle seat back into the position of use at the previous seat longitudinal position is comparatively stronger pressed against the contact surface of the lower rail, as if the Reibradschwinge would be inclined away from the contact surface.

Further, a spindle-nut arrangement may be provided on a driven-side end of the transmission, which is drivable by means of the transmission.

In particular, the gear acts on a friction wheel opposite the end of a spindle-nut arrangement. In this case, a threaded spindle of the spindle-nut arrangement have a front side on the threaded spindle rotatably arranged gear. Furthermore, it can be provided with a screw threaded nut, wherein the nut has a straight outer toothing, in particular a longitudinal toothing, parallel to the axial extent of the threaded spindle. The front side of the threaded spindle arranged gear and the nut can be brought into engagement by means of respective mutually facing attacks such that the nut in the direction of the gear moving rotation of the threaded spindle is inhibited. The stops can be configured in the form of projections with each perpendicular to a direction of rotation of the nut extending contact surfaces. The nut may also be mounted linearly displaceable in a bearing portion, wherein the bearing portion has a cooperating with the straight external toothing of the nut internal teeth. In particular, this can be achieved in a simple manner blocking the transmission when the

Bearing is inhibited from twisting. An inhibition of the rotation of the bearing section can be achieved for example by a corresponding end stop or a fixed connection to a housing. Furthermore, the spindle-nut arrangement can act on a toothed rack by means of a toothed segment arranged on the output side on the bearing section, in order, for example, to control further functions of the vehicle seat via a movement of the toothed rack. In particular, a so-called comfort function of the vehicle seat can be controlled, which locks the backrest during the transfer of the vehicle seat in the easy-entry position in a folded position of the backrest by means provided in a backrest fitting locking device and the backrest in the folded position for the purpose of erecting the Lean back only releases when the vehicle seat was moved back to the original seat longitudinal position. In this case, the rack may be biased resiliently in particular by means of a spring element in the direction of a first end position of the rack.

The friction wheel can roll by means of a rotatably connected to the friction wheel gear, in particular a first gear on an adjacent gear of the transmission, in particular a second gear, when the transmission is blocked. Here, the second gear is preferably rotatably mounted about the rocker axis.

The Reibradachse and / or the rocker axis can parallel to a

Vertical direction run. This has the advantage that the entire memory device can be largely arranged laterally of the upper rail, or the lower rail, which can reduce the required space, especially a required height. Preferably, the memory device is in this case

Direction of an adjacent, as well as a bottom rail and a

Upper rail formed seat rail pair arranged.

The underlying object is further achieved according to the invention by a vehicle seat comprising a seat part, a backrest and a length adjuster connected to the seat part according to the preceding description.

In summary, and in other words, a memory device fixedly connected to the upper rail has a friction wheel which is in contact with the lower rail during an easy-entry operation. In an easy-entry Expiration of the vehicle seat to take an easy-entry position is first pushed forward with a folded back from a use position forward and then to re-take the position of use with pre-folded back of the easy-entry position to the rear.

The friction wheel drives a transmission, which in turn drives a spindle-nut arrangement which can serve to block the friction wheel when the memory device has again reached the memory position. The stopping is effected by the fact that the friction wheel is blocked by the end position of the transmission and the friction between the friction wheel and lower rail prevents displacement of the upper rail relative to the lower rail.

In the case of the Easy Entry procedure, the relative movement of the upper rail to the lower rail drives the friction wheel, which is displaceable with the upper rail, through contact with the lower rail. This rotational movement is transmitted to the threaded spindle. On the threaded spindle there is a nut which moves with a rotating threaded spindle by a screwing along the spindle axis.

If the vehicle seat is in the memory position, it is not possible to move the seat further to the rear, since the longitudinal movement of the nut is blocked by a stop between the nut and the threaded spindle, in particular between the nut and the gear connected to the threaded spindle, and a rotation of the nut together with the threaded spindle is prevented by the stop of the bearing section, the toothed segment or the rack on the housing or on the support member. As a result, a rotation of the friction wheel is also prevented. If the vehicle seat is pushed forward during the Easy Entry procedure, then the stop between the nut and the threaded spindle is released and the nut moves along the spindle axis. The maximum possible

Travel forward defined at a specified spindle pitch the

Thread length on the threaded spindle. If you drive the seat back again, you come back in the memory position in the state where the transmission is blocked by the stop and the vehicle seat thereby stops. Figures and embodiments of the invention

Before describing a possible embodiment of the invention in more detail with reference to drawings, it should be noted first that the invention is not limited to the components described. Furthermore, the terminology used is not limiting, but merely has

exemplary character. Insofar as the singular is used below in the description, the plural is included, unless the context explicitly excludes this.

In the following the invention is based on one shown in the figures

advantageous embodiment explained in more detail. However, the invention is not limited to this embodiment. 1 is a schematic view of a vehicle seat with a

inventive longitudinal adjuster,

2 shows an exemplary illustration of a longitudinal adjuster according to the invention, FIG. 3 shows a perspective illustration of a pair of seat rails with a longitudinal section

Memory device

Fig. 4: an exploded view of the memory device, Fig. 5: a perspective view of the memory device of oblique

above,

Fig. 6: a perspective view of the memory device of oblique

below,

Fig. 7: a slightly oblique side view of the memory device without

Casing, 8 shows a side view of the memory device without housing from a different angle to FIG. 7, FIG.

9 is a longitudinal view of the seat rail pair of Fig. 3,

10 is a sectional view along the section line X-X in Fig. 9,

1: a sectional view along the section line XI-XI in FIG. 9, FIG. 12: a lateral view in cross direction of the seat rail pair from FIG. 3, FIG.

13 shows a sectional view along the section line XIII-XIII in Fig. 12,

14 shows a sectional view along the section line XIV-XIV in Fig. 12,

FIG. 15 is a vertical plan view of the pair of seat rails of FIGS. 3; and FIG

16 shows a sectional view along the bent section line XVI-XVI in FIG. 15.

A vehicle seat 1, shown schematically in FIG. 1, is subsequently produced using three mutually perpendicular spatial directions

described. A longitudinal direction x extends in a vehicle seat 1 mounted in the vehicle largely horizontally and preferably parallel to one

Vehicle longitudinal direction, which corresponds to the usual direction of travel of the vehicle. A transverse direction y extending perpendicularly to the longitudinal direction x is likewise horizontally aligned in the vehicle and runs parallel to one

Vehicle transverse direction. A vertical direction z is perpendicular to the

Longitudinal direction x and perpendicular to the transverse direction y. In a vehicle seat 1 installed in the vehicle, the vertical direction z runs parallel to the vehicle

Vehicle axis. The position and direction information used, such as front, rear, top and bottom relate to a viewing direction of a seated in the vehicle seat 1 occupant in normal seating position, the vehicle seat 1 installed in the vehicle, in a suitable for passenger transport use position with upright backrest. 5 and as usual in the direction of travel is aligned. However, the vehicle seat 1 according to the invention can also be installed in a different orientation, for example transversely to the direction of travel.

The vehicle seat 1 for a motor vehicle shown in FIG. 1 has a seat part 3 and a backrest 5 that is adjustable in its inclination relative to the seat part 3. An inclination of the back 5 can, for example, by means of a detent fitting or a

Getriebebeschlages be adjustable. The vehicle seat 1 is mounted on a longitudinal adjuster 10 for adjusting a seat longitudinal position. The longitudinal adjuster 10 of the vehicle seat 1 shown in FIG. 2 has two

Seat rail pairs, which are each formed of a lower rail 14, in particular a vehicle-fixed seat rail, and an upper rail 12, in particular a seat-fixed seat rail. The seat rails, each one

Sitzschienenpaares, engage around each other and are movable in the longitudinal direction x relative to each other. Further, the top rails 12 and the

Unterschienen 14 of the respective seat rail pair, by means of a

Rail lock 18 locked together, with the common

Actuation of the two rail locks 18 an actuator 16 with one of the two rail locks 18 wirkverbindenden

Transmission rod 16a is provided, wherein the transmission rod 16a cooperates with two rail locks 18. The actuator 16 further includes a handle 16b engaging the transmission rod 16a. Furthermore, the longitudinal adjuster 10 has a memory device 20. FIG. 3 shows an illustration of the pair of seat rails with the memory device 20, wherein the memory device 20 is assigned to the upper rail 12 and interacts with the lower rail 14. The memory device 20 is preferably fixedly connected to the upper rail 12, in the present case preferably by means of the upper rail 12 mounted threaded bolt 88 and nuts 90 mounted. By means of the memory device 20 is one of a designated as a memory position

Seat longitudinal position outgoing relative movement between the upper rail 12 and the lower rail 14 detected. For this purpose, the memory device 20 on a friction wheel 22, which contacts a relative to the memory device 20 movable contact surface 14a of the lower rail 14 and moves away. The friction wheel 22 is in one

Reibradschwinge 32 rotatably mounted. The memory device 20 also has a housing formed from a first housing part 78 and a second housing part 80.

4, the essential components of the memory device 20 are shown in an exploded view. Furthermore, Figures 5 to 8, the memory device 20 in the assembled state from different angles. For fixing the memory device 20 to the upper rail 12 serve a first and a second support member 38, 40, which connectable to each other,

especially riveted, are. The first and second carrier part 38, 40 are preferably made of a metallic material, in particular a metal sheet. The first and second carrier part 38, 40 are screwed by means of a respective threaded bolt 88 and a nut 90 with the upper rail 12. Here, between the carrier parts 38, 40 and the upper rail 12, a spacer 86th

provided, which can be configured differently thick and one

Adjustment of the position of the friction wheel 22 on the lower rail 14 due

differently designed rail profiles is used.

The friction wheel 22 has a rim 24, which is completely enclosed by a friction lining 26. The friction wheel 22 is by means of a bearing pin 30 in the

Reibradschwinge 32 held and rotatably mounted about a Reibradachse R. The Reibradschwinge 32 is pivotally mounted about a swing axis S.

In the present case, the friction wheel axis R and the swing arm axis S run parallel to a vertical direction z. The friction wheel 22 drives during the relative movement of a transmission 42 of the memory device 20 at. For this purpose, first a first gear 44 of the transmission 42 is rotatably mounted about the Reibradachse R and rotatably connected to the friction wheel 22. A rotational movement of the friction wheel 22 is thus transferable by means of the first gear 44 to an adjacently arranged second gear 46. The second gear 46 is preferably rotatably mounted about the swing arm axis S. In the present case, the second gear 46 is held together with a lower arm of the Reibradschwinge 32 by means of a first pin 34 in the first support member 38. An upper arm of the Reibradschwinge 32 is by means of a second bolt 36 in the second

Carrier part 40 held. A third gear 48 of the transmission 42 is a

Bearing pin 68 of a spindle-nut assembly 50 rotatably mounted and also rotatably connected to a threaded spindle 52 of the spindle-nut assembly 50. Thus, a rotational movement of the friction wheel 22 via the first and second

Gear 44, 46 are transmitted to the third gear 48 and the threaded spindle 52. The gears 44, 46, 48 of the transmission 42 are pairwise dimensioned according to predetermined reduction ratios and / or gear ratios.

The threaded spindle 52 is rotatably supported by the bearing pin 68 about the spindle axis G. On the output side, the spindle-nut assembly 50 acts by means of a rotationally fixed to a bearing portion 62 of the spindle-nut assembly 50th

arranged toothed rack 66 on a rack 70. The rack 70 can for example be used to actuate a lock of a backrest fitting, so that when leaving a memory position, the backrest 5 is locked in a pre-pivoted position and then re-reaching the memory position automatically in its pivoting movement is released.

Further, cooperating with the spindle-nut assembly 50 first stopper 54 is provided, which is in the memory position in abutment with a second stop 58 of a nut 56 mounted on an external thread of the threaded spindle 52. The first stop 54 is also shown in the sectional view of FIG. 14 and is presently formed on a portion of the threaded spindle 52. However, for example, the first stop 54 may also be a part of the front side of the threaded spindle 52 arranged third gear 48 may be formed. The nut 56 has an internal thread on the external thread of the

Threaded spindle 52 in the axial direction screwed up and down. Further, the nut 56 on the outside of a coaxial with the spindle axis G of the threaded spindle 52 oriented longitudinal teeth 60. This longitudinal toothing 60 of the nut 56 is in a likewise coaxial with the spindle axis G of the threaded spindle 52 oriented, designed as an internal toothing, spline 64 of a

Bearing portion 62 in accordance with this coaxial direction parallel to

Vertical direction z out.

When the first stop 54 of the threaded spindle 52 comes in a re-reaching the memory position in abutment with the second stop 58 of the nut 56, the threaded spindle 52 is not further rotatable about the spindle axis G and blocked via the third gear 48, the transmission 42. Bei In the present case, such a blocking of the transmission 42 is fixed to the second and third gears 46, 48 and the rigid shafts S, G. Due to its mounting in the friction-wheel rocker 32, the first gear 44 can continue to pivot about the rocker axis S together with the friction-wheel rocker 32. When the transmission 42 is locked, the first gear 44 may be together with the friction wheel 22, due to the rotationally fixed

Connection between the friction wheel 22 and the first gear 44, on the

External teeth of the blocked second gear 46 roll along. In other words, the first gear 44 is driven along the second gear 46 about the swing axis S when the friction wheel 22 due to a in the

Memory position not yet braked relative movement is subjected to a rotational force. By this rolling of the blocked second gear 46, the friction wheel 22, in particular the Reibradachse R, is pivoted in the direction of the contact surface 14 a of the lower rail 14, whereby the pressing force of the friction wheel 22 increases on the contact surface 14 a and whereby a rolling movement of the ung

Friction wheel 22 is decelerated along the contact surface 14a of the lower rail 14, that a displacement of the upper rail 12 is stopped relative to the lower rail 14 in the direction of the memory position and a displacement of the upper rail 12 is prevented beyond the memory position addition. The Reibradschwinge 32 is spring-loaded by means of a spring for illustrative reasons, not shown, with generation of a contact force between the friction wheel 22 and the contact surface 14a in the direction of the contact surface 14a of the lower rail 14. As a result, during a state in which the vehicle seat 1 is not to be slowed down and blocked in its movement, the memory device 20 can be set up to act on the friction wheel 22 to produce a comparatively lower pressure force, which merely prevents unwanted lifting of the friction wheel 22 from the contact surface 14a and a secure detection of the relative movement of the upper rail 12 relative to the lower rail 14 allows. Furthermore, this serves to protect unintentional lifting off of the friction wheel 22 from the contact surface 14a, which may cause rattling noises. An intentional lifting of the friction wheel 22 from the contact surface 14 a can also be done for example by means of a reset mechanism, not shown, wherein the memory device 20 by means of an example acting on the gear 42

Return spring to a zero value corresponding to a memory position

is resettable. Such a reset can be carried out, for example, when manually setting a new seat longitudinal position.

FIG. 9 essentially serves to reproduce the position of the two

Sectional lines of the shown in the following figures 10 and 1 1

Sectional views.

In Fig. 10 it is shown that the spindle-nut assembly 50 by means of

On the output side arranged on the bearing portion 62 arranged toothed segment 66 with the rack 70. The rack 70 is in one in the second

Housing part 80 shaped guide slidably held. The guide has an opening for the passage for the toothed segment 66. The longitudinal x outer edges of the opening serve each as an end stop for the toothed segment 66. At one end portion of the rack 70, for example, a receptacle 76 for a Bowden cable for operative connection with a locking of a detent fitting of the backrest 5 may be provided. The rack 70 is preferably by means of a representation of technical reasons, not shown spring element in the direction of a representation of the first end position of the rack 70th resiliently biased. This first end position of the rack 70 corresponds to a state in which the toothed segment 66 at a corresponding

End stop of the guide of the rack 70 is applied. Fig. 1 1 shows a view of the transmission 42 of the memory device 20 wherein the Reibradachse R a smaller distance to the contact surface 14a than the

Swing axis S has. The Reibradachse R is viewed in the longitudinal direction x behind the swing arm S arranged. The dimensioning of the friction wheel 22, in particular an arrangement of

Reibradachse R relative to the swing arm axis S, was chosen so that when locked gear 42, the friction wheel 22 by the contact force between the teeth of the second gear 46 and the teeth of the non-rotatably connected to the friction wheel 22 first gear 44, an increase in the pressing force between the friction wheel 22 and the contact surface 14a of the lower rail 14 takes place. As a result, in the case of braking the movement of the vehicle seat 1, an increased

Frictional force can be achieved. Together with the effect that the first gear 44 can roll together with the friction wheel 22 on the external teeth of the blocked second gear 46 when the gear 42 is blocked, is characterized by such geometrical dimensioning of the first and second gear 44, 46 and the rocker axis S, the Reibradachse R and a diameter of the friction wheel 22, the pressing force of the friction wheel 22 on the contact surface 14a when braking the relative movement of the upper rail 12 to the lower rail 14 increases. FIG. 12 essentially serves to reproduce the position of the two

Cutting lines of the shown in the following figures 13 and 14

Sectional views.

The section shown in Fig. 13 is perpendicular to the spindle axis G of

Threaded spindle 52 and shows the radial sequence of the spindle axis G

inter-bearing and / or guided bearing pin 68, the threaded spindle 52, the nut 56 and the bearing portion 62nd The section shown in Fig. 14 is perpendicular to the spindle axis G of the threaded spindle 52 and shows the two stops 54, 58 in detail.

FIG. 15 essentially serves to reproduce the position of the section line of the sectional representation shown in the following FIG.

The section shown in FIG. 16 runs along a kinked section line, which in a left part perpendicularly through the spindle axis G and the

Swinging axis S, as well as in a right part vertically through the

Swingarm axis S and the Reibradachse R, runs. In this sectional view, the connection of the Reibradschwinge 32 to the first and second support member 38, 40, each with the first and second bolts 34, 36 shown in detail again. Furthermore, the spindle-nut assembly 50 is shown in a section, whereby an internal structure of the spindle-nut assembly 50 is recognizable by the different threads.

The features disclosed in the foregoing description and drawings may be significant to the realization of the invention in its various forms both individually and in combination.

Although the invention has been described in detail in the drawings and the foregoing description, the illustrations are illustrative and exemplary and not limiting. In particular, the choice of the proportions of the individual elements shown in the drawing should not be construed as necessary or restrictive. Furthermore, the invention is not limited in particular to the illustrated embodiments. Other variants of the invention and their execution will be apparent to those skilled in the art from the foregoing

Revelation and the figures. Terms used in the claims, such as "comprising,""having,""including,""containing," and the like, do not exclude other elements or steps. The use of the indefinite article does not exclude a majority. A single device may perform the functions of several units or devices mentioned in the claims.

LIST OF REFERENCE NUMBERS

1 vehicle seat

3 seat part

5 backrest

10 longitudinal adjuster

12 upper rail

14 lower rail

14a contact surface

16 actuator

16a transmission rod

16b handle

18 rail lock

20 memory device

22 friction wheel

24 rim

26 friction lining

30 bearing pin

32 friction wheel swing

34 first bolt

36 second bolt

38 first carrier part

40 second carrier part

42 gearbox

44 first gear

46 second gear

48 third gear

50 Spindle nut arrangement

52 threaded spindle

54 first stop

56 mother 58 second stop

60 longitudinal toothing

62 bearing section

64 spline 66 toothed segment

68 bearing bolts

70 rack

76 recording

78 first housing part 80 second housing part

86 spacer

88 threaded bolt

90 Nut R Friction wheel axis

S swing axle

G spindle axis x longitudinal direction y transverse direction z vertical direction

Claims

claims

Longitudinal adjuster (10) for a seat part (3) and a backrest (5) having vehicle seat (1), in particular a motor vehicle seat, wherein the

Longitudinal adjuster (10) has an upper rail (12) and a lower rail (14), wherein the upper rail (12) relative to the lower rail (14) in a longitudinal direction (x) is displaceable, wherein one of the upper rail (12)

associated and with the lower rail (14) cooperating memory device (20) is provided, wherein the memory device (20) emanating from a seat longitudinal position referred to as memory position

Relative movement between the upper rail (12) and the lower rail (14) by means of a friction wheel (22) detects, which contacts a relative to the memory device (20) movable contact surface (14a) and moves away, wherein the friction wheel (22) during the relative movement a transmission (42) of the memory device (20) drives,

characterized in that

the transmission (42) can be blocked when the memory position is reached again, as a result of which a rolling movement of the friction wheel (22) along the contact surface (14a) of the lower rail (14) can be braked such that a displacement of the upper rail (12) relative to the lower rail (14) 14) stopped in the direction of the memory position and a displacement of the upper rail (12) beyond the memory position is prevented.

A longitudinal adjuster (10) according to claim 1, wherein the friction wheel (22) is rotatable about a friction wheel axis (R) in an about a swing axis (S).

pivotable Reibradschwinge (32) is mounted.

Longitudinal adjuster (10) according to claim 2, wherein the Reibradachse (R) in

Longitudinal direction (x) considered behind the rocker axis (S) is arranged. Long adjuster (10) according to one of claims 2 or 3, wherein the

Reibradachse (R) has a smaller distance to the contact surface (14a) than the rocker axis (S).

A longitudinal adjuster (10) according to any one of claims 2 to 4, wherein the

Friction wheel rocker (32) to generate a contact force between the friction wheel (22) and the contact surface (14a) in the direction of the contact surface (14a) of the lower rail (14) is spring-loaded. 6. longitudinal adjuster (10) according to any one of claims 2 to 5, wherein in the case of manual adjustment of a deviating from the current seat longitudinal position seat longitudinal position while a rail lock (18) is unlocked manually, the friction wheel (22) by means of a Reibradschwinge (32 ) acting mechanism of the contact surface (14a) is lifted, so that no detection of a relative movement of the upper rail (12) to the lower rail (14) during adjustment of the new seat longitudinal position and / or stored in the memory device (20) relative movement a zero value can be reset.

A longitudinal adjuster (10) according to any one of claims 2 to 6, wherein the

Reibradachse (R) in the longitudinal direction (x) considered behind the swing arm axis (S) is arranged.

Longitudinal adjuster (10) according to one of claims 1 to 7, wherein the gear (42) acts on a friction wheel (22) opposite end of a spindle-nut assembly (50).

Longitudinal adjuster (10) according to claim 8, wherein a threaded spindle (52) of the spindle-nut arrangement (50) has a front side on the threaded spindle (52) rotatably arranged third gear (48).

10. A longitudinal adjuster (10) according to claim 9, wherein a with the threaded spindle (52) screwed nut (56) is provided, wherein the nut (56) is a straight External toothing, in particular a longitudinal toothing (60), parallel to the axial extent of the threaded spindle (52).

Long adjuster (10) according to claim 10, wherein the front side of the

Threaded spindle (52) arranged third gear (48) and the nut (56) by means of respective mutually facing stops (54, 58) are engageable such that a nut (56) in the direction of the third gear (48) moving rotation the threaded spindle (52) is inhibited.

Longitudinal adjuster (10) according to claim 1 1, wherein the nut (56) is mounted linearly displaceably in a bearing section (62), wherein the bearing section (62) cooperates with the straight external toothing of the nut (56) internal toothing, in particular a longitudinal toothing (64 ), having.

The longitudinal adjuster (10) according to any one of claims 1 to 12, wherein the friction wheel (22) by means of a non-rotatably connected to the friction wheel (22) first gear (44) on an adjacent second gear (46) of the transmission (42) rolls when the Transmission (42) is blocked.

Longitudinal adjuster (10) according to claim 13, wherein the adjacent second gear (46) of the transmission (42) is rotatably mounted about the rocker axis (S).

15. Vehicle seat (1) comprising a seat part (3), a backrest (5) and a longitudinal part (10) connected to the seat part (3) according to one of the preceding claims.