DE202004011387U1 - Rail system for adjustable car seat, comprising memory function for returning into prior position when backrest is released - Google Patents

Abstract

The seat can be longitudinally moved inside the vehicle with an inner rail (102) sliding in an outer rail (101) and the backrest folded towards the front in particular in order to let a passenger enter a rear seat. When moved the seat is temporarily secured in this position with a locking unit (103) comprising a spring supported bolt engaging with complementary openings. A memory unit assembled of a vertically movable bolt and a sliding element moving horizontally along the lower rail (101) returns the seat into its prior position.

Description

The The invention relates to a motor vehicle seat according to the preamble of claim 1.

One such motor vehicle seat comprises a seat frame; a backrest, which are mounted on the seat frame and from their respective, substantially upright Use position (in which they to support the back of a vehicle occupant is set) in the direction of a seat surface of the seat frame can be folded forward is; a rail longitudinal guide, with the seat frame for adjusting the seat longitudinal position in the rail longitudinal direction is movable; a locking device with at least one movably mounted Locking element for locking the rail longitudinal guide in a previously set Longitudinal seating position, the one along the rail longitudinal direction extended locking rail with a plurality in the rail longitudinal direction is assigned to consecutively arranged locking points, in which engage the locking element for locking the rail longitudinal guide can; one together with the seat frame in the rail longitudinal direction movable coupling mechanism between the locking device and the backrest, which unlocks the locking device when the backrest on the seat is folded forward; a memory device, by means of the seat frame during a movement in the rail longitudinal direction automatically in a predefinable, defined as memory position Longitudinal seating position can be stopped; Setting means of the memory device (eg. in the form of a slider), with which the memory position in the rail longitudinal direction is adjustable; and a locking device of the memory device for locking a set memory position.

such Seats are used as front seats in motor vehicles, especially in two-door Motor vehicles, used to by folding the backrest the boarding of a passenger or the insertion of an object into the rear of the motor vehicle. An additional Relief when boarding is thereby achieved that the seat after folding the backrest due to the unlocking the locking device can be moved forward.

To the Moving the seat frame is the rail longitudinal guide, which is a vehicle to be arranged guide rail and a seat-side guide rail supporting the seat frame includes. The two guide rails engage with each other in such a way that the seat-side guide rail along the extension direction of the rail longitudinal guide (rail longitudinal direction) can be moved on the guide rail to be arranged on the body, around the seat frame in the rail longitudinal direction to relocate, so the seat longitudinal position to reset.

Under the seat frame are present in each case all in the rail longitudinal direction understood movable components of the load-bearing seat construction, So in particular those components of the rail longitudinal guide, such as z. B. the seat-side guide rail (Upper rail), which when adjusting the seat longitudinal position in the rail longitudinal direction to be moved.

The a plurality in the rail longitudinal direction one behind the other arranged locking points having locking rail the rail longitudinal guidance, in the at least one locking element for locking the rail longitudinal guide in a certain seat longitudinal position can engage, is usually to be arranged with the body-mounted guide rail the rail longitudinal guidance too a unit summarized. In particular, the locking rail one piece be integrated into the bodywork guide rail to be arranged by having their locking points directly in the body to be arranged guide rail itself are formed.

One Motor vehicle seat of the type mentioned above is known from WO 00/5002 A1 known and offers on the one hand the possibility after folding the backrest towards the seat the seat frame, and thus the entire vehicle seat, forward to postpone boarding a passenger in the rear of a To facilitate motor vehicle (easy-entry function). On the other hand can the seat subsequently very easy to return to its original seat longitudinal position be moved if this seat longitudinal position by means of the space provided Memory device has been saved as a memory position. In this case will the seat frame when pushing back automatically stopped in the memory position, using one of the memory device associated stop with a seat frame associated counter-stop interacts.

Of the Invention is based on the problem, a motor vehicle seat of to improve the aforementioned type on.

This Problem is inventively the creation of a motor vehicle seat with the features of the claim 1 solved.

Thereafter, the locking device of the memory device on a locking element which is mounted for selectively engaging with the locking rail and lifting out of the locking rail slidably, in particular perpendicular to the extension direction the guide rails longitudinally displaceable.

By doing the locking element in the rail longitudinal direction movable and in a direction transverse to the rail longitudinal direction limited slidably on a rail in the longitudinal direction extended slide rail, the memory device can total by only two components, namely the locking element and the slide rail are formed. The Slide rail here preferably has a rail longitudinal direction extended guide section on, along which the locking element in the rail longitudinal direction is movable and on which the locking element in one direction transverse to the rail longitudinal direction is limited to the locking element in and out of engagement with to bring the locking rail.

Prefers has the locking device for locking the memory device in a certain seat longitudinal position a transverse to the rail longitudinal direction limited displaceable locking element, which is for locking the memory device with the locking points of the locking device associated locking rail is to be engaged.

This leads to a further considerable simplification of the structure of a motor vehicle seat with Easy-entry function, as for locking the locking device the rail longitudinal guidance on the one hand and the memory device on the other hand, only a single locking rail is used in both the locking elements of the locking device as well as the locking element of the memory device engage can.

These Development of the invention is based on the recognition that the Locking device of the rail longitudinal guide on the one hand and the locking device the memory device on the other hand, one and the same locking points use a locking rail for locking or locking can, without the function of the locking device or the locking device limit. Because according to her Task, the vehicle seat when pushed back from a vorverlagerten Position, which after folding the backrest to exercise the Easy-entry feature was approached, again in its previous Position (memory position) stop, the locking device the memory device only ever be locked when the Motor vehicle seat with pre-folded backrest displaced forward or is pushed back from the forward position. But so long the easy-entry function exercised is, there is no need for locking the rail longitudinal guide means the one for this provided locking device. Because the easy-entry function That's just because of the free mobility of the two guide rails characterized to one another after folding the backrest. Thus, must the locking points of the locking bar only after exercise of the easy-entry function again for a locking of the rail longitudinal guide means the locking device can be used; but then again no more need for a persistent locking of the memory device.

hereby will further reduce the number of necessary components for the Provision of both a lockable memory device achieved.

There the locking rail, which serves to lock the rail longitudinal guide and so that the seat frame in total in a certain seat longitudinal position is provided, is designed very stable, so they, for example It is able to absorb correspondingly high forces in a crash case advantageous, when approaching the memory position on the memory device occurring forces over the Locking element of the memory device directly into that locking rail. hereby the other components of the memory device are relieved, so that, for example, as an adjustment of the memory device Serving sliding slider and an associated slide, on the slider longitudinally displaceable is stored, inexpensive and can be made of plastic with little weight.

The Locking rail can easily in the Karroseriefest to be arranged guide rail integrated rail longitudinal guidance be by the locking points in or on that guide rail are provided.

Of the Engagement region of the locking element of the memory device, via the the locking element with the locking rail in engagement can be brought, is preferably designed such that the Engagement area either in a locking point or two spaced (adjacent) locking points of the locking rail form-fitting can intervene. For this purpose, the engagement region of the locking element for example, two along the extension direction of the guide rails (Rail longitudinal direction) spaced ratchet teeth on, to the geometry and spatial Arrangement of the locking points of the locking rail such They are adapted to both with their outer contour in one Locking point or each in each case a locking point engage, in the latter case of the engagement area one between two locking points of the locking rail located bridge overrun becomes.

To the Lifting the locking element from the locking rail preferably serves a pivotally mounted unlocking element, in particular in the form of a release hook, the locking element can underneath for lifting out of the locking rail.

Of the Unlocking hook preferably comprises an engagement region, with he permanently engages under the locking element, so also when the locking element engages with the associated one Locking rail is located and a pivoting movement of the release hook does not take place for lifting the locking element. by virtue of the permanent undershaping of the locking element by the Unlocking hook is achieved that upon actuation of the Unlocking hook for the purpose of lifting the locking element from the locking rail of the release hook already the Locking element engages underneath and thus a safe, reliable lifting guaranteed is.

At the engagement area of the release hook closes a Hubbereich, only in the recess of the locking element engages and thus engages under the locking element, if the Lift locking element from the associated locking rail is.

The Locking element is preferably elastic in the direction of the state prestressed, in which it engages in the locking rail and thus a memory position defined in which the seat frame when pushing back from the forward position can be stopped.

The elastic bias of the locking element is preferably carried out by means of two spaced-apart elastic elements, in particular in the form of spring elements, between which the unlocking element engages, so that when lifting the locking element off the locking rail against the bias of the two elastic Elements a symmetrical load on the two elastic elements he follows.

The Entriegelungselement is such with the folding backrest the motor vehicle seat in operative connection, in particular via a Bowden cable, that the pivotal position of the unlocking element in dependence It controls whether the backrest is in an upright position Use position or in a position folded forward on the seat located.

According to one concrete embodiment the unlocking element (eg by means of a torsion spring) is elastic biased toward a position in which it is the locking element from the locking rail lifts. In this state, that can Locking element when moving the vehicle seat (with upright, in use position befindlicher backrest) by a seat frame side, for example, on the seat-side guide rail set, drivers are taken to a new memory position adjust. Thus, when moving the seat frame with in Use position of the backrest, with the aim of a new comfort position for one Vehicle occupants, always at the same time a corresponding Readjustment of the memory position. This ensures that that at each readjustment of the seat longitudinal position of the seat frame a Corresponding readjustment of the memory position takes place. As a driver is suitable for e.g. a housing or leadership part the locking device of the rail longitudinal guide, regularly on the seat side guide rail is arranged so that they move the seat frame in seat longitudinal direction is moved to the then two guide rails in the newly set seat longitudinal position to be able to lock again.

At the Folding the backrest from the use position, around the seat to facilitate boarding to be able to move in a forward position, then with the backrest (eg over a Bowden cable) coupled unlocking against his Preload operated in such a way that it is no longer the locking element in the out of the locking rail holds dug state. As a result the locking element under the action of the elastic provided for this purpose Elements automatically engaged with the locking rail, so that the current seat long position stored as a memory position. In a subsequent shift back the vorverlagerten motor vehicle seat this is then automatically in the seat longitudinal position stored as a memory position, in the a seat frame side stop, z. B. a housing or guide part the at the seat-side guide rail arranged locking device, with an associated stop the memory device, in particular the locking element of Memory device, contacts.

According to one embodiment of the invention, the unlocking element is preceded by an actuating element which (preferably via a Bowden cable) is in operative connection with the backrest of the motor vehicle seat and acts on the backrest for actuating the unlocking element when it is folded forward. For this purpose, the actuating element and the unlocking element can be positively coupled with each other, and preferably such that when an impact on the actuating element by folding the back rest, the unlocking element is only taken in a part of the triggered by the folding of the backrest movement of the actuating element. For example, the actuating element and the unlocking element may be coupled to each other via a slotted guide such that when an action on the actuating element as a result of folding the backrest first, the actuating element performs a relative movement to the unlocking without taking the unlocking, with a guide pin and a guide link, the are each provided on one of the two elements mentioned, are moved to each other by the guide pin slides along the guide slot. Only when the guide pin engages in this case with a lateral end of the guide slot, then the unlocking element is taken by the actuator.

hereby is achieved that a movement of the actuating element along a certain way, in particular a pivoting movement to a certain Angle, in a correspondingly lower movement of the unlocking element, So about a pivoting movement about a correspondingly smaller angle, is implemented. This is advantageous, for example, if by that with the backrest coupled actuator when folding the backrest at the same time the unlocking of the locking device is brought about should, in order to release the locking of the two guide rails and the necessary relative to the forward displacement of the seat-side guide rail relative movement the two guide rails to enable. Because the release the locking device for reliable recording of crash forces a ensure correspondingly firm locking of the two guide rails must, one regularly larger actuation path requires, as the latch of the memory device, the only one stop for Retrieving a previously set seat longitudinal position provides, open the described positive Coupling of the actuating element with the unlocking the possibility of the actuator both the release the locking device and - via the unlocking - the locking to initiate the memory device.

in this connection can the actuator as an operating lever be formed, which is pivotally mounted on the same axis like the unlocking element.

To the Engaging in the locking points preferably formed by locking openings the locking rail has the locking element at least two, preferably three (spaced apart in the rail longitudinal direction) Locking elements on, in pairs in one and the same place of the associated Interlocking rail engage or in each one of each engage two adjacent locking points while a overlap between the two locking points located bridge.

are exactly three locking elements on the locking element, in particular in Form of locking pin, provided so grab preferably two of the three locking pins in one and the same locking point and the third locking pin in another, adjacent locking point.

Further Features and advantages of the invention will become apparent in the following Description of exemplary embodiments be clear from the figures.

It demonstrate:

1 a perspective view of a section of a rail longitudinal guide for a motor vehicle seat with a locking device for locking the two guide rails of the rail longitudinal guide and with a memory device;

2a a representation of the coupling of a memory device associated unlocking hook with the backrest of a motor vehicle seat;

2 B a plan view of a pivotally mounted actuating lever, via which the unlocking hook is actuated when folding the backrest;

2c a representation of the engagement of the Entriegelungshakens in a locking element of the memory device;

3 a section through the rail longitudinal guide according to 1 in the area of the locking device and the memory device with locked locking device and locked memory device;

4 a cross section through the rail longitudinal guide according to 1 in the area of the locking device and the memory device with locked locking device and unlocked memory device;

5 a cross section through the rail longitudinal guide according to 1 in the area of the locking device and the memory device with still locked locking device and already locked memory device;

6a and 6b a schematic representation of the engagement of locking elements of the locking device and locking elements of the memory device in associated locking openings of a locking rail;

7 a schematic representation of a seat frame of a motor vehicle seat.

An in 7 in a side view schematically illustrated seat frame G (seat base) includes a seat-side guide rail 102 (Seat rail), the rail in the longitudinal direction L movable on a to be fastened to the vehicle body guide rail 101 (Bottom rail) superimposed, and a seat side part T, the front and rear toggle lever height adjustable on the seat rail 102 is articulated. On the other, in 7 unrecognizable long side, the seat frame G has a corresponding arrangement. Between the two seat side parts of the seat frame G extends a seat support for receiving a seat cushion, on the seat a vehicle occupant can take place.

Furthermore, the side parts T of the seat frame G each have a bearing LS for pivotally mounting a in 7 dashed lines indicated backrest R on.

In the present case are understood as parts of the seat frame in each case all those frame components that on the body-mounted bottom rail 101 in the rail longitudinal direction L are movable, ie in particular the seat rail 102 , the seat side part T and the other related components of the seat, such. B. the height adjustment serving articulated lever and the backrest R.

If such an adjustable in the longitudinal direction L vehicle seat used for a two-door vehicle, it is known to facilitate the entry into the rear of the vehicle, the backrest to the seat longitudinal adjustment that when folding the backrest R in the direction of the between the seat side parts T extending seat one of the rail longitudinal guide 101 . 102 assigned locking device is unlocked and the seat with pre-folded backrest can be moved forward. This entry-level facilitation is regularly referred to as easy-entry function.

Should the vehicle seat after folding the backrest on the seat and the subsequent Moving into a pre-displaced position facilitating entry back to his starting position (before the easy-entry function is exercised) pushed back become so a so-called memory device facilitates the retrieval the original one Seating position. By means of a memory device can when folding the backrest R on the seat a vehicle seat, the current seat longitudinal position of the seat frame G stored and the seat when pushing back from the forward Position automatically in the seat longitudinal position stored as a memory position again be stopped, with a counter - attack one together with the Seat frame G slidable assembly meets a stop the memory device.

such Motor vehicle seats with easy-entry function and memory function are known. For further Details will be given in this regard by way of example to WO 00/55 002 A1.

The following is based on the 1 to 6b a special embodiment of a memory device for a motor vehicle seat with ease of entry (easy-entry function) are explained in more detail.

1 initially shows a section of a rail longitudinal guide for a motor vehicle seat consisting of a lower rail 101 and a seat rail longitudinally displaceably guided in the rail longitudinal direction L 102 , which in the adjusted seat longitudinal position by means of a at the top rail 102 arranged locking device 103 can be locked.

The locking device 103 has in a known manner more in a housing 130 slidably mounted transversely to the extension direction L of the rail longitudinal guide, in 1 Not shown ratchet teeth, which with a body-mounted (eg., At the bottom rail 101 arranged) locking bar are engageable to lock the seat rail relative to the lower rail in the current seat longitudinal position. For safety reasons, the ratchet teeth are resiliently biased in the direction of that position in which they engage in the locking rail, so that in principle a proper locking of the rail longitudinal guide is ensured in the respective seat longitudinal position.

To release the locking of the seat rail 102 relative to the bottom rail 101 is at the locking device 103 a pivotally mounted triggering element 135 provided to a vehicle occupant by manually actuating a pivotally mounted on the seat rail 102 stored operating lever 136 can act. As a result, the locking device 103 unlocked and the seat longitudinal position of the corresponding motor vehicle seat can be by moving the seat rail 102 relative to the bottom rail 101 reset.

On the trigger element 135 can to Lö sen the locking device 103 also via a connecting rod 137 a about an axis A of a seat rail fixed bracket H pivotally mounted actuator 2 in the form of an actuating lever with a base body 20 acting through a Bowden cable 7 with the backrest R (compare 7 ) is coupled to a seat frame. The Bowden cable 7 has a shell 70 on that with an end section 75 is mounted in a Bowdeneinhängung the bracket H, and one in the shell 70 Guided soul in the form of a traction device 71 that with one end 76 on a lever arm 21 of the operating lever 2 is mounted. About this Bowden cable 7 is the operating lever 2 so coupled to the backrest of the vehicle seat, that in a folding forward of the backrest from its use position in the direction of the seat surface of the actuating lever 2 is pivoted and this with an operating section 23 such on the connecting rod 137 acts, that these the triggering element of the locking device 103 operated and the locking of the guide rails 101 . 102 solves. Thus, by folding the backrest on the seat, the locking of the guide rails can be 101 . 102 , by acting on the locking device 103 , and thus solve the required to facilitate entry forward displacement of the seat rail 102 together with the seat frame 101 initiate.

The pivoting of the operating lever 2 takes place against the action of a torsion spring 25 , by means of the operating lever 2 in a warehouse section 22 is resiliently biased so that it without the action of the Bowden cable 7 when folding the backrest no actuation of the trigger element 135 the locking device 103 causes.

To be able to stop the vehicle seat after a forward displacement for the purpose of facilitating entry in a subsequent pushing back from the vorverlagerten position back in the original seat longitudinal position, is the rail longitudinal guide 101 . 102 further provided with a memory device by means of which the seat frame is automatically stopped when pushed back in a stored as a memory position seat longitudinal position. This will be explained below with reference to 2a to 2c and 3 be explained in more detail, in each of which individual components of the memory device and hereby cooperating further modules of the rail longitudinal guide 101 . 102 are shown.

The memory device comprises as essential component a locking element 1 , on a along the rail longitudinal direction L extended and to be arranged with the body bottom rail 101 connected slide rail 110 is guided longitudinally displaceable.

The slide rail 110 includes a mounting portion 111 over which they (by riveting) with the bottom rail 101 is connected, a sliding section 112 on which the locking element 1 is guided longitudinally displaceable and one of the sliding portion 112 Angled support section 115 which is in a recess 15 of the locking element 1 protrudes and there to support two in the recess 15 arranged spring elements F is used.

The locking element 1 points in its basic body 10 a slot extending in the rail longitudinal direction L. 12 on, from the sliding section 112 the slide rail 110 is penetrated so that the locking element 1 on the slide rail 110 in the rail longitudinal direction L can slide.

In addition, the locking element 1 on the slide rail 110 in the vertical direction z transversely to the rail longitudinal direction L slidably mounted and thereby by means of the two spring elements F, on the one hand on the support portion 115 the slide rail 110 and on the other hand on a bottom surface of the recess 15 of the locking element 1 support and are designed as compression springs in the form of coil springs, biased towards a state in which three at the bottom of the locking element 1 provided latching elements in the form of locking cams 11a . 11b . 11c have the tendency, in this provided locking openings O of the lower rail 101 intervene.

In the bottom rail 101 a plurality of such locking openings O in the rail longitudinal direction L are arranged one behind the other, these locking openings O are separated from each other by webs S and thereby one in the lower rail 101 form integrated locking rail. In the locking holes O in the lower rail 101 integrated locking rail can according to 3 in particular, the three perpendicular to the rail longitudinal direction L movably guided ratchet teeth 131 the locking device 103 with their front, conical end sections 131 . 131b respectively. 131c intervene, the distance between the ratchet teeth 131 the locking device 103 as well as the distance of the locking openings O along the rail longitudinal direction L is chosen and coordinated so that in each position of the seat rail 102 concerning the bottom rail 101 at least one of the ratchet teeth 131 with its conical end section 131 respectively. 131b respectively. 131c can engage in one of the locking openings O. This allows the seat rail 102 in each seat longitudinal position with respect to the bottom rail 101 lock.

As a result, the locking holes O serve in the lower rail 101 integrated locking rail not only for locking the seat rail 102 concerning the bottom rail 101 by engagement of the ratchet teeth 131 the locking device 103 in the locking holes O but at the same time also for locking the locking element 1 the memory device to set a specific seat longitudinal position as a memory position can. In this case, all three of the underside of the locking element 1 protruding locking cams 11a . 11b . 11c in locking holes O of the lower rail 101 one, namely two locking cams (eg. 11a and 11b ) in a locking opening O and another locking cam (eg. 11c ) in a further locking opening O of the lower rail 101 ,

For lifting the locking element 1 from the locking holes O of the lower rail 101 is the locking element 1 a release lever 3 associated with one in his main body 30 provided bearing opening 35 is pivotally mounted on the same axis A as the operating lever 2 ,

The release lever 3 is designed as a release hook and has an engagement region at its hook-shaped angled end 31 and a subsequent stroke area 32 on. The intervention area 31 is permanently engaged with one on the underside of the locking element 1 trained kidney-shaped recess 14 and engages under the locking element 1 , without this from the locking holes O of the lower rail 101 dig.

But will the unlocking hook 3 pivoted about its pivot axis A such that its stroke range 32 in the kidney-shaped recess 14 of the locking element 1 engages and thereby engages under this, this leads to a lifting of the locking cams 11a . 11b . 11c of the locking element 1 from the associated locking openings O of the lower rail 101 ,

Based 3 it becomes clear that the release hook 3 with his intervention area 31 and its stroke area 32 at a location of the locking element 1 attacks, which lies in the rail longitudinal direction L between the two springs F. The locking rail formed by the locking openings O and the intermediate webs S is thus directly in the lower rail 101 integrated.

The respective pivot position of the release hook 3 is determined by the position of the backrest R (cf. 7 ); it is more specifically dependent on whether the backrest R is in an upright position of use or in a position folded forward on the seat surface of the seat frame G. This is due to the fact that the release hook 3 over the actuator 2 and the on the actuator 2 attacking Bowden cable 7 is coupled to the backrest R of the seat frame G. These are the in 2 B in a plan view in detail illustrated actuator 2 and the release hook 3 positively engaged with each other and via a slotted guide 26 . 36 as in 2a shown.

The pivotally mounted about the axis A actuator 2 includes a main body 20 one of which is as an attachment of one end 76 of the traction device 71 of the Bowden cable 7 serving lever arm 21 , a for actuating the trigger element 135 the locking device 103 serving operating section 23 , one with the torsion spring 25 cooperative section 22 and one of the positive coupling with the release hook 3 serving coupling section 24 protrude. The coupling section 24 of the actuating element 2 has a guide setting 26 in which a guide pin 36 engages, that of the main body 30 of the release hook 3 projects. As a result, during a pivoting movement of the actuating element 2 the unlocking hook 3 be taken, but the entrainment of the release hook 3 not already at the beginning of the pivoting movement of the actuating element 2 takes place, but only after an initial free travel, which is characterized in that the guide pin 36 of the release hook 3 in the lead setting 26 of the actuating element 2 is moved.

4 shows the locking device 103 and the memory device, formed essentially by the locking element 1 , in a state in which the seat frame is locked in a certain seat longitudinal position with upright in the use position, upright backrest. Here are two of the three ratchet teeth 131 the locking device 103 with their conical end sections 131b and 131c in each case a locking opening O in the lower rail 101 and lie with the oblique flanks of their conical end sections 131b and 131c such at the edges of the locking openings O to that a play-free locking of the seat rail 102 and thus of the seat frame G (cf. 7 ) at the bottom rail 101 is ensured.

Furthermore, engages under this condition, the release hook 3 with his in the kidney-shaped recess 14 of the locking element 1 introduced stroke range 32 the locking element 1 such that this from the locking openings O of the lower rail 101 is dug. In a displacement of the seat frame G together with the seat rail 102 concerning the bottom rail 101 in Seat longitudinal direction L can thus the locking element 1 through the seat rail side locking device 103 be taken with the locking element 1 along the associated sliding guide 110 is moved. This ensures that in a readjustment of the seat longitudinal position of the seat frame G with befindlicher in use position, upright back, which is the finding of a new comfort position for a vehicle occupant, the memory device forming the locking element 1 is taken.

Will now be the backrest by means of the locking device 103 in a defined seat longitudinal position locked seat frame G folded forward in the direction of the seat, so the Bowden cable acts on the actuator 2 and causes a pivoting of the actuating element 2 this is due to the action of the actuating element 2 about its operation section 23 and the downstream connecting rod 137 on the trigger element 135 the locking device 103 the locking of seat rail 102 and bottom rail 101 solved so that the seat frame G together with the seat rail 102 can be moved forward to facilitate boarding. The unlocking hook will also be included 3 pivoted about the axis A, but only after by a movement of the guide pin 36 of the release hook 3 in the associated guide slot 26 of the actuating element 2 the actuator 2 initially a relative movement with respect to the release hook 3 has executed. The extent of this relative movement is determined by the length of the guide slot 26 of the actuating element 2 certainly. After the guide pin 36 from one end to the other end of the guide slot 26 hiked, the unlocking hook will continue 3 in the pivoting movement of the actuating element 2 taken along, so that its stroke range 32 out of engagement with the locking element 1 the memory device and this device under the action of the associated spring elements in the form of compression springs with its locking cam in associated locking holes O of the lower rail 101 can engage.

This allows different swivel angle of the actuating element 2 on the one hand and the unlocking hook 3 on the other hand to realize the common axis A. This is useful because for lifting the locking elements of the locking device 103 typically a pivoting of the actuating element 2 50 ° is required while the release hook 3 for the required action on the locking element 1 eg only needs to be pivoted by 15 °. In this context, additionally or alternatively, a correspondingly large opening angle of the kidney-shaped recess 14 of the locking element 1 Be provided (eg 35 °), there is a free path of the release hook 3 (Movement without action on the locking element 1 ).

For example, in the concrete in the 2a shown state of the actuating element 2 and the release hook 3 , Which corresponds to a backrest which is in an upright position of use, by pulling the backrest forward onto the seat surface of the seat frame, a tensile force K on the traction means 71 of the Bowden cable coupled to the backrest 7 exercised, this initially leads to a pivoting movement B1 of the actuating element 2 (counterclockwise), in which the traction means 71 with one end 76 is mounted. Here, the moves in the actuator 2 provided backdrop 26 relative to the guide pin 26 of the release hook 3 along a corresponding direction B2 until the guide pin 36 at the opposite end of the scenery 26 strikes and in the following the unlocking hook 3 during pivoting of the actuating element 2 is taken. As a result, the unlocking hook pivoted in a direction B3 (counterclockwise), by the pivoting movement B1 of the directly with the traction means 76 coupled actuator 2 is predetermined. This is how the stroke range gets 32 of the release hook 3 out of engagement with the kidney-shaped recess 14 of the actuating element 1 and this can under the action of the compression spring F provided for this purpose in locking openings O of the lower rail 101 engage. As a result, the current seat longitudinal position of the seat frame and the seat rail 102 concerning the bottom rail 101 stored as memory position.

5 shows the arrangement in a state in which the locking element 1 the memory device already completely with its locking cams 11a . 11b . 11c in associated locking openings O of the lower rail 101 engaged, the ratchet teeth 131 the locking device 103 However, not fully excavated from the associated locking openings O are. This ensures that the locking element 1 is fully locked before releasing the locking device 103 by lifting the ratchet teeth 131 is completed and the seat frame with pre-folded backrest for ease of entry in the rail longitudinal direction forward (direction V) can be moved. Here, the seat rail side locking device 103 taken.

In a later pushing back of the seat frame from the vorverlagerten position out this automatically in the means of the locking element 1 Seat position saved as memory position stopped by the fixed adjusting device 103 with its housing with a stop provided for this purpose 19 of the locking element 1 in plant device and thus a further shift to the rear is not possible. The seat longitudinal position existing prior to the exercise of the easy-entry function (forward displacement of the seat frame to facilitate boarding) is therefore automatically retrieved by simple means.

6a shows a bottom view of the bottom rail 101 where exactly one ratchet tooth 131 the locking device 103 with its conical end 131 in a locking opening O of the lower rail 101 engages and being all three locking cams 11a . 11b . 11c of the locking element 1 engage in a total of two, separated by a web S locking openings O.

6b In contrast, shows a situation in which two ratchet teeth 131 with their conically tapered end sections 131b . 131c engage in each case a locking opening O, in which case the three locking cams 11a . 11b . 11c the locking device 1 again in a total of two locking openings of the lower rail 101 intervention.

In summary, the distances of the webs separated by webs S locking openings O in the rail longitudinal direction L and the corresponding distances of the ratchet teeth 131 and the locking cam 11a . 11b . 11c designed such that always a simultaneous locking of the locking element 1 the memory device and the ratchet teeth 131 the locking device 103 in the locking holes O of the lower rail 101 is possible when the seat frame is in its memory position, so the locking device 103 with her case 130 at the assigned stop 19 of the locking element 1 is applied.

An important advantage of the above based on the 1 to 6b The arrangement shown is the small number of components with which a memory function is realized in a motor vehicle seat, which can be relocated to facilitate entry with Vorklappter back forward. Because the memory device comprises as the only components a perpendicular to the extension direction L of the guide rails 101 . 102 sliding locking element 1 and an associated slide rail 110 , along which the locking element 1 in rail longitudinal direction L is entrained. The locking element 1 Thus, at the same time serves as a slider, which can be adjusted for a readjustment of the memory position in the rail longitudinal direction L. The usual division into a slide displaceable in the rail longitudinal direction and a separate, pivotally mounted thereto locking element is eliminated. Furthermore, the locking element 1 no separate locking bar assigned, but this is rather directly through the locking openings O and webs S in the lower rail 101 formed, in which the locking device 103 with their ratchet teeth 131 can intervene.

Claims (29)

Motor vehicle seat with - a seat frame (G), - a backrest (R) which is pivotally mounted on the seat frame (G) and can be folded forward in the direction of a seat surface of the seat frame, - a rail longitudinal guide ( 101 . 102 ), with which the seat frame (G) for adjusting the seat longitudinal position in the rail longitudinal direction (L) is movable, - a locking device ( 103 ) for locking the rail longitudinal guide in a previously set seat longitudinal position with at least one movably mounted locking element, which is associated with a along the rail longitudinal direction (L) extending locking rail (O, S) with a plurality along the rail longitudinal direction (L) successively arranged locking points (O), with which the locking element for locking the rail longitudinal guide ( 101 . 102 ) is engageable, - a jointly with the seat frame (G) in the rail longitudinal direction (L) movable coupling mechanism ( 7 ), which the locking device ( 103 ) unlocked when the backrest (R) is folded forward on the seat, - a memory device by means of which the seat frame (G) during a movement in the rail longitudinal direction (L) can be automatically stopped in a predetermined, defined as memory position seat longitudinal position , - adjusting means ( 1 . 110 ) of the memory device with which the memory position in the rail longitudinal direction (L) is adjustable and - a locking device of the memory device for locking a set memory position, characterized in that the locking device for locking the memory device, a locking element ( 1 ), which is displaceable for engaging and disengaging with the locking rail (O, S). Motor vehicle seat according to claim 1, characterized in that the locking element ( 1 ) with at least one locking point (O) of the locking device ( 103 ) associated locking rail (O, V) can be brought into engagement. Motor vehicle seat according to claim 1, characterized in that the locking element ( 1 ) for longitudinally displaceable in and out of engagement with the locking rail (O, S). Motor vehicle seat according to claim 2 or 3, characterized in that the Verriegelungsele ment ( 1 ) is displaceable in and out of engagement with the locking rail (O, S) perpendicular to the rail longitudinal direction (L) is displaceable. Motor vehicle seat according to one of the preceding claims, characterized in that the locking element ( 1 ) in the rail longitudinal direction (L) movable and in one direction (z) transversely to the rail longitudinal direction (L) limited slidably on a rail in the longitudinal direction (L) extending slide rail ( 110 ) stores. Motor vehicle seat according to claim 6, characterized in that the slide rail ( 110 ) extending in the rail longitudinal direction (L) guide portion ( 112 ), along which the locking element ( 1 ) in the rail longitudinal direction (L) is movable and on which the locking element ( 1 ) is displaceable in a direction (z) transversely to the rail longitudinal direction limited to the locking element ( 1 ) into and out of engagement with the locking rail (O, S) to bring. Motor vehicle seat according to one of the preceding claims, characterized by a pivotally mounted unlocking element ( 3 ) for lifting the locking element ( 1 ) from the locking rail (O, S). Motor vehicle seat according to claim 6, characterized in that the unlocking element ( 3 ) is formed by a release hook, which in a recess ( 14 ) of the locking element ( 1 ) intervenes. Motor vehicle seat according to claim 7 or 8, characterized in that the unlocking element ( 3 ) the locking element ( 1 ) for lifting out of the locking rail (O, S) engages under. Motor vehicle seat according to one of claims 7 to 9, characterized in that the unlocking element ( 3 ) an intervention area ( 31 ), which is permanently engaged with the locking element ( 1 ) is located. Motor vehicle seat according to one of claims 7 to 10, characterized in that the unlocking a Hubbereich ( 32 ), which only for lifting the locking element ( 1 ) from the locking rail (O, S) with the locking element ( 1 ) is engaged. Motor vehicle seat according to one of the preceding claims, characterized in that the locking element ( 1 ) is resiliently biased toward a state in which it engages in the locking rail (O, S). Motor vehicle seat according to claim 10, characterized in that the locking element ( 1 ) is resiliently biased by means of two in the rail longitudinal direction (L) spaced-apart elastic elements (F), in particular in the form of spring elements. Motor vehicle seat according to claim 7 and 11, characterized in that the unlocking element ( 3 ) on the locking element ( 1 ) in one place ( 14 ), which lies in the rail longitudinal direction (L) between the two elastic elements (F). Motor vehicle seat according to one of claims 7 to 11 and one of claims 12 to 14, characterized in that the unlocking element ( 3 ) is coupled to the backrest (R) in such a way that, when the backrest (R) is in the use position, it is in contact with the locking element (R) ( 1 ) to hold it in a position raised from the locking rail (V, O). Motor vehicle seat according to one of claims 7 to 15, characterized in that the unlocking element is coupled to the backrest (R) in such a way that it is brought into a spatial position when the backrest (R) is folded onto the seat surface of the seat frame (G). in which there is an engagement of the locking element ( 1 ) in the locking rail (O, S) allows. Motor vehicle seat according to claim 15 or 16, characterized in that the unlocking element ( 3 ) via a Bowden cable ( 7 ) is coupled to the backrest (R). Motor vehicle seat according to one of claims 15 to 17, characterized in that the unlocking element ( 3 ) an actuating element ( 2 ) is connected upstream, which is in operative connection with the backrest (R) and on the backrest (R) when folding on the unlocking ( 3 ) acts. Motor vehicle seat according to claim 16, characterized in that the unlocking element ( 3 ) and the actuating element ( 2 ) are positively connected with each other. Motor vehicle seat according to claim 18 or 19, characterized in that the unlocking element ( 3 ) and the actuating element ( 2 ) in such a way that during a movement of the actuating element ( 2 ) by folding the backrest (R) first a limited relative movement of the unlocking element ( 3 ) with respect to the actuating element ( 2 ) and in a further movement of the actuating element ( 2 ) the unlocking element ( 3 ) is taken. Motor vehicle seat according to claim 19 or 20, characterized in that the unlocking element ( 3 ) and the actuating element ( 2 ) via a link guide ( 26 . 36 ) communicate with each other. Motor vehicle seat according to one of claims 18 to 21, characterized in that the actuating element ( 2 ) is formed by an actuating lever. Motor vehicle seat according to one of claims 18 to 22, characterized in that the actuating element ( 2 ) and the unlocking element ( 3 ) are pivotally mounted on the same axis (A). Motor vehicle seat according to one of the preceding claims, characterized in that the locking element ( 2 ) at least two locking elements ( 11a . 11b . 11c ), which are engageable with locking points (O) of the locking rail (O, S). Motor vehicle seat according to claim 24, characterized in that the locking element ( 1 ) three locking elements ( 11a . 11b . 11c ), which are engageable with the locking rail (O, S). Motor vehicle seat according to claim 24 or 25, characterized in that during an engagement of the locking element ( 1 ) in the locking rail (O, S) two locking elements ( 11a . 11b ; 11b . 11c ) engage in a locking point (O). Motor vehicle seat according to one of the preceding Claims, characterized in that the locking points (O) of the locking rail (O, S) through locking holes be formed. Motor vehicle seat according to one of the preceding claims, characterized in that the distances of the locking points (O) in the rail longitudinal direction (L) in such a way to the distances of the locking elements ( 11a . 11b . 11c ) of the locking element ( 1 ) as well as the blocking elements ( 31 ) of the locking device ( 103 ) are matched in the rail longitudinal direction (L) that both the locking element ( 1 ) via its locking elements ( 11a . 11b . 11c ) as well as the locking device ( 103 ) via their blocking elements ( 131 ) with the locking points (O) of the locking rail (O, S) can be engaged when the locking device ( 103 ) at a stop ( 19 ) of the locking element ( 1 ) is present. Motor vehicle seat according to one of the preceding claims, characterized in that the locking points (O) in or on a guide rail to be arranged on the body ( 101 ) of the rail longitudinal guide ( 101 . 102 ) are provided.