DE102013207027A1 - Vehicle seat, method for mounting a vehicle seat and seat fitting - Google Patents

Abstract

The present invention relates in particular to a vehicle seat with a so-called easy-entry function, which has at least the following: a seat frame which can be adjusted in the longitudinal direction, a locking device for seat longitudinal adjustment, a backrest (R.) Mounted pivotally on the seat frame via a seat fitting (B) ), - a locking device (V) for locking the backrest (R) in a use position, wherein the locking device (V) has a locking element (1) and a locking element (5) and the locking element (1) for locking the backrest (R) with the locking element (5) is engaged and for folding the backrest (R) in the direction of a seat surface of the seat frame out of engagement with the locking element (5) can be brought, and - a coupling mechanism (2, 6) for coupling the locking device (V) with the locking device, wherein the coupling mechanism (2, 6) at least one with the Verriegelungsvor direction (V) operatively connected driver element (2) and the driver element (2) when folding the backrest (R) on a coupling element (6) acts to solve the folding of the backrest (R), the locking of the locking device. According to the invention, inter alia, it is provided that the locking element (1) and the driver element (2) are arranged on one and the same fitting side of the seat fitting (B). Furthermore, a method for mounting a vehicle seat is disclosed in which a vehicle seat can be optionally equipped with different variants of seat fittings (B, B *), as well as a seat fitting for a vehicle seat.

Description

The present invention particularly relates to a vehicle seat according to the preamble of claim 1, which is equipped with a so-called easy-entry function, and a method for mounting a vehicle seat according to claim 13 and a seat fitting according to claim 16.

In the case of vehicle seats with an easy-entry function, it is provided to be able to fold a backrest of the vehicle seat for easier entry and exit from a vehicle toward a seat surface of the vehicle seat and at the same time permit longitudinal adjustment of the vehicle seat. The backrest is in principle mounted pivotally on a seat frame of the vehicle seat via a seat fitting, so that an inclination of the backrest can be adjusted in a position of use and a folding forward of the backrest from a use position is allowed. At such a seat fitting a locking device is provided on a regular basis, via which the backrest is locked in the use position and over which the backrest can be released for folding in the direction of the seat. Such a locking device should be designed so that it holds the backrest in a crash case in a defined position to the seat and secures the backrest against unintentional folding forward.

In order to allow a longitudinal adjustment of the vehicle seat when folding the backrest, the locking device is regularly coupled via a coupling mechanism with a locking device for the seat-length adjustment. About the locking device while the seat frame is locked in a seat longitudinal position. Through the coupling mechanism, an actuating force is transmitted to the locking device as a result of the adjustment when folding the backrest to release the locking of the locking device. For example, the coupling mechanism on a driver element which acts via a coupling element, such as a rotatably mounted actuating ring or a Bowden cable on the locking device, so that automatically after unlocking the locking device and folding the backrest and the locking on the locking device for the Seat longitudinal adjustment released and the vehicle seat with folded backrest in the seat longitudinal direction is adjustable, that is usually, along a seat longitudinal guide is displaced.

From the DE 20 2008 008 312 U1 are a generic vehicle seat with easy-entry function and an associated seat fitting known. Here, the essential components of a locking device are provided on an inner side of the backrest fitting to lock the backrest in a position of use crash-proof and fold when needed, while the essential components of a coupling mechanism for coupling the locking device with a locking device for seat longitudinal adjustment on the outside of the Seat fitting are arranged.

Thus, the locking device comprises the DE 20 2008 008 312 U1 Among other things, a pivotally mounted pawl, which is for crash-proof locking of the backrest in a use position via a locking toothing with a locking element in the form of a locking disc in engagement. About an actuator in the form of a Reibdaumes the pawl can be pivoted so that the pawls and the locking disc are no longer engaged with each other and thus the backrest can be folded forward. On the opposite outer side of the seat fitting, inter alia, a pivotally mounted driving element is arranged in the form of a pivot lever, which is connected via a Bowden cable with a coupling element in the form of a turntable in connection. This pivot lever is pivoted when pivoting the pawl to release the backrest about an axis of rotation which is different from the axis of rotation of the pawl. The pivot lever thereby transmits an adjusting force acting on it via a Bowden cable to the turntable, whereby the locking device of the seat-length adjustment is released.

From the DE 10 2006 061 037 B3 Also, a vehicle seat with easy-entry function and an associated seat fitting are known in which the essential components of a locking device and a coupling mechanism are arranged on different sides of the seat fitting. It is in the DE 10 2008 061 037 B3 proposed to form a pivotally mounted lever as a driving element of the coupling mechanism with two relative to each other in position mutually variable areas. It is a relative movement of sections of the lever allowed to each other, whereby at a possible malposition of the backrest - if, for example, the backrest was too far or excessively folded forward - should be prevented that the locking device is blocked and a folding back of the back no longer possible is.

In the known from the cited prior art, vehicle seats and seat fittings, for example, there is the problem that the assembly of the vehicle seats and the seat fittings is relatively expensive and the cooperating components of a Locking device and a coupling mechanism must be matched very closely to each other.

In addition, it is relatively expensive in seating platforms where different types of seat fittings are to be used for vehicle seats of different types, if the same backrest depending on the type of vehicle seat either with a seat fitting with locking device and coupling mechanism or with a seat fitting without locking device and no coupling mechanism to be provided on a seat frame.

For example, previously vehicle seats for a four- or five-door vehicle, which need not have an easy-entry function, equipped with a seat fitting a first variant, which does not require locking device and coupling mechanism and is designed and provided only for the inclination adjustment of the backrest. However, vehicle seats for a two- or three-door vehicle with seat fittings for an easy-entry function are also produced on the basis of the same seating platform. It is regularly provided that the reclining-side fixation of the respective seat fitting takes place at different locations of a backrest side part of the backrest, depending on which variant of the backrest fitting is to be used. To be used for both variants lateral backrest part (backrest side part) of a backrest, usually a side backrest spar, thus different areas for fixing the respective seat fittings must be provided for the different variants of seat fittings and vehicle seats. These are usually welds to which a fitting part or a backrest adapter of the respective seat fitting is welded to the backrest side part of the backrest.

The present invention is therefore an object of the invention to further improve a vehicle seat and a seat fitting of the type mentioned above and in particular to facilitate the assembly of vehicle seats to be produced with different variants of seat fittings (with or without easy-entry function) ,

This object is achieved both with the vehicle seats according to claim 1 and claim 10 and with the mounting method of claim 13 and the seat fitting of claim 16.

• – einem in Längsrichtung verstellbaren Sitzgestell,
• – einer Feststellvorrichtung für die Sitzlängsverstellung, um das Sitzgestell in einer Sitzlängsposition zu arretieren,
• – einer über einen Sitzbeschlag schwenkbar an dem Sitzgestell gelagerten Rückenlehne, wobei über den Sitzbeschlag ein Vorklappen der Rückenlehne auf die Sitzfläche im Rahmen einer Easy-Entry-Funktion ermöglicht wird und über den vorzugsweise auch eine Neigung der Rückenlehne bezüglich einer Sitzfläche des Fahrzeugsitzes eingestellt werden kann,
• – einer Verriegelungsvorrichtung zum Arretieren der Rückenlehne in einer Gebrauchsposition, wobei die Verriegelungsvorrichtung ein vorzugsweise verschwenkbares Verriegelungselement und ein Sperrelement aufweist und das Verriegelungselement zum Arretieren der Rückenlehne mit dem Sperrelement – zum Beispiel über eine sperrende Rastverzahnung – in Eingriff steht und zum Vorklappen der Rückenlehne in Richtung einer Sitzfläche des Sitzgestells außer Eingriff mit dem Sperrelement bringbar ist, und
• – einem Koppelmechanismus zur Kopplung der Verriegelungsvorrichtung für die Rückenlehne mit der Feststellvorrichtung für die Sitzlängsverstellung, wobei der Koppelmechanismus wenigstens ein mit der Verriegelungsvorrichtung wirkverbundenes und vorzugsweise verschwenkbares Mitnehmerelement und ein mit der Feststellvorrichtung wirkverbundenes Koppelelement aufweist und das Mitnehmerelement beim Vorklappen der Rückenlehne auf das Koppelelement einwirken kann, so dass mit dem Vorklappen der Rückenlehne die Arretierung der Feststellvorrichtung gelöst wird und das Sitzgestell in Längsrichtung verstellbar ist (Easy-Entry-Funktion).

According to a first aspect of the present invention, a vehicle seat is proposed with at least

• A longitudinally adjustable seat frame,
• A seat longitudinal adjustment lock to lock the seat frame in a seated longitudinal position,
• - A mounted on a seat fitting pivotally mounted on the seat backrest, wherein on the seat fitting a folding of the backrest on the seat under an easy-entry function is made possible and can be adjusted via the preferably also a tilt of the backrest with respect to a seat surface of the vehicle seat .
• - A locking device for locking the backrest in a use position, wherein the locking device comprises a preferably pivotable locking element and a locking element and the locking element for locking the backrest with the locking element - for example via a locking locking teeth - is engaged and for folding the backrest in the direction a seat surface of the seat frame can be brought out of engagement with the blocking element, and
• - A coupling mechanism for coupling the locking device for the backrest with the locking device for the seat longitudinal adjustment, wherein the coupling mechanism has at least one operatively connected to the locking device and preferably pivotable driver element and an operatively connected to the locking coupling element and the driver element when folding the backrest can act on the coupling element , so that the locking of the locking device is released with the folding forward of the backrest and the seat frame is adjustable in the longitudinal direction (easy-entry function).

According to the invention, it is additionally provided that the locking element of the locking device and the driving element of the coupling mechanism to be arranged on one and the same fitting side of the seat fitting, so that the locking element and the driver element thus both either in the region of an outside or in the region of an inner side of the seat fitting and a lateral backrest part the backrest are located.

By the two elements of the locking device on the one hand and the coupling mechanism on the other hand are arranged on the same fitting side of the seat fitting, the seat fitting can be made significantly more compact and greatly simplify the installation of a vehicle seat. Thus, only at one fitting side, the locking element and the driver element are adjustably mounted, so that the other opposite fitting side almost completely for the fixation on the backrest available stands. Here, it is preferable to arrange the locking element and the driver element on an outer side of the seat fitting and thus consequently in the region of an outer side of one of two backrest longitudinal sides of the backrest, between which the backrest cushion is provided. On the inside of the seat fitting, which faces the opposite backrest side of the backrest, thus a larger area for the fixation, in particular welding on a backrest side part is available.

Preferably, the fixation of the seat fitting takes place on a backrest part of the backrest via a backrest side adapter or backrest adapter of the seat fitting, wherein the locking element and the driver element are arranged on exactly one side of this backrest adapter. Consequently, on one side of this backrest adapter, the locking element and the entrainment element-as well as an actuation element controlling the release of the backrest and acting on the locking element-are adjustably mounted, preferably pivotable. The opposite side of the backrest adapter is thus almost completely available for fixing to a backrest side part of the backrest.

By providing essential components of the locking device and the coupling mechanism to the backrest adapter of the seat fitting and not more - such as in the DE 20 2008 008 312 U1 - In some cases also on an opposite (inner) fitting side on the backrest side part of the backrest itself, no components of the locking device or the coupling mechanism need to be adjustably arranged on the backrest side part of the backrest. As a result, areas for the welding can be readily formed on the backrest side part of the backrest with a part of the seat fitting, both for a seat fitting a first variant with locking device and coupling mechanism and for a seat fitting a second variant without locking device and coupling mechanism for a weld be used. It can thus be used, for example, the same welding areas on a backrest side part of the backrest, regardless of whether the vehicle seat is provided for a two- or three-door vehicle and is therefore equipped with an easy-entry function, or if the vehicle seat for a four- or five-door vehicle and thus provided without easy-entry function.

The locking element is coupled to the driver element such that during an adjustment of the locking element for releasing the backrest, an adjustment of the driver element is in a coupling position in which in a subsequent folding the backrest, the driver element can act on the coupling element to release the lock on the locking device , In this case, the locking element and the driver element are preferably mounted in each case pivotably and coupled to one another such that in a triggered by a user pivoting the locking element for releasing the backrest, the driver element is pivoted into its coupling position. Only through the pivoting of the locking element for releasing the backrest, therefore, the driver element is here transferred to a position in which it can act on folding the backrest on the coupling element to actuate the locking device of the seat longitudinal adjustment and to release the locking of the seat frame in the seat longitudinal direction.

For example, the driver element is designed as a driver pawl and has a driver hook, via which the driver pawl in its coupling position with a coupling element in the form of an actuating ring engages when the backrest is folded forward. Thus, the folding of the backrest and the engagement between the driving pawl and the actuating ring, the actuating ring is rotated, the rotational movement - in a conventional manner - leads to an actuation of the locking device for the seat-length adjustment.

In the course of a compact design of the seat fitting, the associated locking device and the associated coupling mechanism is provided in one embodiment that the locking element and the driver element are pivotable about the same axis of rotation. The physical axis of rotation for the two elements is defined here for example by a pin or bolt which is formed or fixed to a backrest side adapter.

The arrangement of locking element and driver element along a common axis of rotation is preferably such that the locking element and the driver element along the axis of rotation are adjacent. Here, for example, the driver element along the axis of rotation and with respect to a pointing away from the backrest and extending transversely to the seat longitudinal direction spatial direction is arranged in front of the locking element. Thus, the locking element is, for example, between a backrest side adapter of the seat fitting and the driver element.

It is of course also possible that a pivotally mounted locking element and a driver element coupled thereto and likewise pivotably mounted are pivotable about different, but preferably parallel, axes of rotation.

In a first embodiment, the locking element and the driver are rotatably connected to each other, so that a pivoting movement of the locking element, in particular for releasing the backrest, also leads directly to a synchronous rotational movement of the driver element by the same rotation or swivel angle.

In a second embodiment, the locking element and the driver element are at least slightly adjustable relative to each other, in particular mounted pivotably. Such a relative movement of the locking element to the driver element is possible.

This may be beneficial for folding back the seat back from a folded position. For example, it may be provided that the backrest is locked in a folded-forward position via the locking element so that a passenger does not have to hold the backrest in the folded-forward position when moving the vehicle seat. Such a comfort locking is usually only then released again when the vehicle seat assumes its original seat longitudinal position, which he had held before folding and moving the vehicle seat. If, however, an obstacle or a corresponding load of luggage behind the vehicle seat prevents the vehicle seat from returning to its original seat longitudinal position, a possibility must nevertheless be provided for the backrest to still be able to be folded back. For this purpose, it is provided that a user can act on an actuating element of an actuating mechanism on the locking element, so that the comfort locking is released, even without the vehicle seat has taken the original seat longitudinal position again. Due to the provision of at least slight adjustability of the locking element and the driver element to each other in the second embodiment, the driver is not necessarily mitzuverstellen in the required adjustment of the locking element for manual unlocking the comfort locking the driver or at least not over the entire adjustment path of the locking element and thus at most to relocate to a smaller swing angle.

In a refinement based thereon, the pivotable driver element via at least one spring element, for. B. in the form of a leg spring, biased in a pivoting direction. In order to limit a pivoting of the driver element in this pivoting direction, the locking element has a stop region. A pivoting of the driver element relative to the locking element in a pivoting direction, in which the driver element is biased, is thus limited by the locking element by the driver element over the stop region away (not) is adjustable in this pivoting direction. For example, for this purpose, the locking element and the driver element via a pin-slot pairing into each other, so that over the slot a maximum relative movement of the two elements is limited to each other. In one embodiment, the spring-loaded driver element on the slot, into which engages an engagement pin of a stop region of the locking element. A pivoting movement of the driver element is thus limited by the pin against the action of the spring element. A relative movement between the driver element and the locking element is possible only against the force acting on the driver spring, maximum up to the (second) end of the slot opposite the (first) end of the slot against which the pin rests in a position of use of the backrest ,

In the pivoting direction, in which the driver element is biased, this is preferably the coupling position, so that the driver element is automatically pressed or pulled over the spring element in the coupling position, as soon as this is permitted by the pivoting of the locking element to release the backrest. The spring element provided for prestressing the driver element preferably rests on the one hand on the driver element and on the other on a cover of the seat fitting. The provided for biasing the driver element spring element is therefore not supported here against another movable element of the locking device or the coupling mechanism, but against a relative to the backrest immovable component of the seat fitting.

As already indicated above, a vehicle seat according to the invention and a seat fitting according to the invention can also have, in addition to a locking element and a driver element, a comfort locking element with which the locking element for locking the backrest engages in a position of use in a folded-back position of the backrest Lock backrest in its folded position. Similarly, an actuating element can be provided, via which the locking element can be acted upon, to bring the locking element for folding the backrest out of engagement with the locking element.

In a possible embodiment, it is now provided not only to arrange the locking element and the driver element on a fitting side of the seat fitting, but also the actuating element and / or the comfort locking element. If all four mentioned elements arranged on a fitting side, a one-sided fitting structure is feasible, in which both a crash lock and a comfort lock and a (mechanical) control for the locking device of the seat-length adjustment are on the same side of the seat fitting.

According to a second aspect of the present invention, a vehicle seat according to claim 10 is provided.

In such a vehicle seat, the lock member not only has a first engagement portion for locking with the lock member in the use position of the seat back, but also a second engagement portion different from the first engagement portion adapted for locking with the comfort lock member in a folded-back position of the seat back and is provided. In this case, both the crash-proof locking of the backrest in a position of use and the comfort locking in a folded easy-entry position of the backrest are thus taken over by different areas of a single locking element.

In one possible embodiment, a locking element in a first engagement region forms a plurality of teeth for the teeth with a locking element and in a second engagement portion of a locking pin, which can be engaged behind by the comfort locking element, when the backrest is in a folded position.

Based on a vehicle seat according to the invention according to the first aspect of the present invention, a third aspect is the provision of a method according to claim 13 for mounting a vehicle seat, which can be mounted in different configurations or types, in particular with or without easy-entry function.

At least two different variants of seat fittings can be mounted on such a vehicle seat within the framework of an assembly method according to the invention, a first (easy-entry) seat fitting with locking device and coupling mechanism being provided and a further, second seat fitting without locking device and without coupling mechanism being provided. Thus, the one seat fitting may be provided for example for a version of the vehicle seat for a two- or three-door vehicle and the other version of the vehicle seat for a four- or five-door vehicle.

In the context of a method according to the invention it is now provided that the backrest has a backrest side part, on which in each case a part of the respective seat fitting to fix, in particular is to be welded, and that seat fitting is equipped with a locking device and a coupling mechanism with a locking element and a driver element, the are arranged on one and the same fitting side of the seat fitting. In an assembly method according to the invention can then be ensured hereby that a part of the respective seat fitting is always fixed to at least one matching specific area of the backrest side part - and in particular in the same place or at the same locations on an inside or outside of the backrest side part, regardless of Whether a locking device and a coupling mechanism and thus an easy-entry function are provided or not.

Consequently, in an assembly method according to the invention, an easy-entry seat fitting with locking device and coupling mechanism is fixed via a fitting side on an inside or outside of the backrest side part at least one area on which fixes a (other) part of a seat fitting without easy-entry function would, which has no locking device and no coupling mechanism. In an assembly method according to the invention thus identical areas of a backrest side part are used for lean-side fixation of a seat fitting, regardless of whether the respective seat fitting provides an easy-entry function or not.

For example, in a vehicle seat of a first type (with easy-entry function) with locking device and coupling mechanism, a certain portion of a backrest side part with an adapter of a seat fitting of a first variant welded and in a vehicle seat of a second type without locking device and coupling mechanism, the same area of the backrest side part a fitting part of a seat fitting of a second variant welded. Thus, for example, in the case of a seat platform with at least two variants for four / five and two / three-door vehicles, a backrest side part of a backrest designed identically for each vehicle seat type is always welded at the same points to a part of the respectively provided seat fitting become. The backrest side part and the associated seat fittings are thus matched to one another so that regardless of the particular variant of the seat fitting and the respective Fahrzeugitztyps always at least one matching area of the backrest side part is used for welding with a seat fitting.

Of course, this does not exclude that at least one additional welding area or an additional welding point is provided on the backrest side part, on which only the welding of a particular variant of a backrest fitting takes place. For example, it can be provided that the same welds are used on an inner side of the backrest side part for fixing different variants of seat fittings with or without locking device and coupling mechanism. In one of the seat fittings, for example, the easy-entry seat fitting, however, the one armrest side adapter of the seat fitting is welded outside the identical welds still at least one additional weld on the inside of the backrest side part with the backrest side part. In this case, the adjustable components of the locking device and the coupling mechanism (in particular the locking element and the driver element) are arranged on this adapter. Here, for example, the seat fitting without easy-entry function is welded directly to a fitting on a first or more first welds with the backrest side part, while the seat fitting with easy-entry function and an additional backrest adapter plate not only at the first weld or first welded to the backrest side part is welded, but in addition to at least a second weld.

Oriented on the basic idea of the present invention to design a seat fitting as compact as possible and compact and in particular to facilitate the installation of a vehicle seat with easy-entry function, a seat fitting according to claim 16 is provided according to another aspect of the present invention.

In a seat fitting according to the invention here are provided as part of the seat fitting at least one locking device for locking the backrest in a use position and a coupling mechanism for coupling the locking device with a locking device for seat longitudinal adjustment. The locking device also has a locking element and a locking element, wherein the locking element for locking the backrest with the locking element is engaged and for folding the backrest towards a seat surface of a vehicle seat frame out of engagement with the locking element can be brought. The coupling mechanism comprises at least one actively connected to the locking device entrainment member and a coupling element, wherein the coupling mechanism is configured so that when properly mounted the seat fitting, the driver element when folding the backrest can act on the coupling element, so that with the folding of the backrest on the coupling element the Arresting the locking device is released and the seat frame is adjustable in the longitudinal direction. About a backrest adapter of the seat fitting, which is to be fixed to a backrest side part of the backrest, in particular to be welded, parts of the locking device and / or the coupling mechanism (adjustable) are mounted.

According to the invention in this case is provided in accordance with the first aspect of the present invention that the locking element and the driver element on one and the same side of the backrest adapter - and thus on one and the same fitting side of the seat fitting - are arranged.

With a seat fitting according to the invention, the advantages stated above in connection with a vehicle seat according to the invention and a previously described mounting method according to the invention can thus be achieved. Accordingly, the advantages and features of a vehicle seat according to the invention and an assembly method according to the invention which have been explained above and are still described below also apply to a seat fitting according to the invention and vice versa.

For example, an inventive vehicle seat can be produced by a seat fitting according to the invention. Likewise, with an inventive seat fitting an inventive assembly method performed by an inventive seat fitting with easy-entry function is used as one of two possible variants of different seat fittings for the assembly of vehicle seats at least two different types.

Further advantages and features of the present invention will become apparent in the following description of exemplary embodiments with reference to the figures.

Show it:

1 a detail of an embodiment of a vehicle seat according to the invention with easy-entry function and a seat fitting according to the invention, in which both a locking element of a locking device and a coupling element of a coupling mechanism and an actuating element for actuating the Locking element are arranged on one and the same fitting side of the seat fitting;

2A - 2D in with the 1 matching perspective view different positions of the locking device and the coupling mechanism in folding a backrest of the vehicle seat;

3A - 3C Representation of different positions of the locking device and the coupling mechanism when folding back the backrest when an original seat longitudinal position has not been resumed;

4A - 4C a detail of a vehicle seat without easy-entry function with a seat fitting a first variant in different views;

5A - 5C the vehicle seat of 1 . 2A to 2D and 3A to 3C with easy-entry function and with the seat fitting of the other, second variant in different views.

The 1 shows a detail of an embodiment of a vehicle seat according to the invention, of which in particular the pivotally mounted on a seat frame, not shown here backrest R and a seat fitting B for connecting the backrest R are shown to the seat frame. About the illustrated seat fitting B can be set to a seat surface of the vehicle seat in a position of use of the backrest R an inclination of the backrest. In addition, a so-called easy-entry function is provided with the illustrated seat fitting B, in which the backrest R can be folded forward in the direction of the seat for facilitated entry and exit from a vehicle and the seat frame of the vehicle seat is displaceable in the seat longitudinal direction. In this case fall the pivot axes by which the backrest R is adjustable in its inclination and by which the backrest can be folded forward together.

To provide the easy-entry function, the seat fitting B on a locking device V, via which the backrest is locked crash-proof in a position of use and can release the backrest R for folding in the direction of the seat. The seat fitting B also has one of a driver element in the form of a driving pawl 2 and a coupling element in the form of an actuating ring 6 existing coupling mechanism, via which the locking device is coupled to a locking device, not shown here for the seat-length adjustment. About the locking device, the seat frame can be locked in a seat longitudinal position, via a rail longitudinal guide the seat frame is displaced in the longitudinal direction after releasing the locking device. Such a locking device may in particular have a memory device by means of which the vehicle seat automatically assumes the original seat longitudinal position again after a folding of the backrest and after a displacement of the seat frame as part of an easy entry entry or exit when the backrest R folded back and the seat frame is pushed back.

To fix the seat fitting B on a seat part on which the seat cushion is arranged for the seat and relative to the backrest about a pivot axis D1 in its inclination to be adjustable and pivotable, the seat fitting B has a seat side adapter AS. Parts of the fitting B for the inclination adjustment of the backrest R and, in particular, a blocking element of the locking device V in the form of a blocking disk are non-rotatably mounted on this seat part-side adapter AS designed here as an adapter plate 5 intended. This locking disc 5 has a portion with a plurality of ratchet teeth at a portion of its radial peripheral surface 15 on, with which a locking element of the locking device V in the form of a pawl 1 in a use position of the backrest R is engaged to lock the backrest R relative to the seat part of the vehicle seat crash-proof.

The pawl 1 is here pivotally mounted on a backrest side adapter AL here in the form of an adapter plate. The backrest-side adapter AL is assigned to the backrest R and fixed by welding to a backrest side part L of the backrest R. In the backrest side part L, which defines the backrest longitudinal side of the backrest R, it may be, for example, a backrest spar. The backrest side part adapter AL is here on an outer side of the backrest side part L and is welded on the inside of the backrest side part L with this, as will be explained in more detail below.

The arranged on the outside of the backrest side adapter AL pawl 1 has a storage section 10 on, on which it is pivotally mounted about a pivot axis or rotation D3 on the adapter AL. The pawl 1 also has two arms 13a . 13b on that over the storage section 10 connected to each other. A locking arm 13a in particular has a toothed first engagement area 15 on, over which the pawl 1 with the ratchet teeth 51 the locking disc 5 - as in 1 shown - is engaged to lock the backrest R in a use position. A curved release arm 13b the pawl 1 extends like a finger from the bearing section 10 , so that between the locking arm 13a and the release arm 13b a latch mouth is formed.

On the back part side adapter AL is also an actuator in the form of a Reibdaumens 3 mounted pivotably about a pivot axis D2. The pivot axis D2 of the Reibdaumens 3 runs parallel to the pivot axis D3 of the pawl 1 and parallel to the pivot axis D1 of the backrest R. The friction thumb 3 is designed cam-like and on a bearing section 30 pivoted. Next to the storage section 30 has the friction thumb 3 a circular segment-like in the plan view operating portion 31 on the inside between the locking arm 13a and release arm 13b formed latch mouth of the pawl 1 is included. Depending on the pivotal position of the friction thumb 3 can this over its operating section 31 on the locking arm 13a or the release arm 13b act. In the 1 is the operating section 31 on the locking arm 13a and thus ensures the meshing of the pawl 1 in the locking disc 5 ,

On the same side of the fitting as the pawl 1 is in this case the Mitnehmerklinke 2 the coupling mechanism 2 . 6 the seat fitting B arranged. The driving pawl 2 is here also about the pivot axis or rotation D3 pivotally mounted on the back part side adapter AL. The driving pawl 2 lies in this case of the backrest outside viewed in front of the pawl 1 along the pivot axis D3 and is with the pawl 1 coupled so that the driving pawl 2 in a pivoting or rotary movement of the pawl 1 is adjusted in the same direction of rotation or rotation about the axis of rotation D3.

In a variant not shown here, the pawl 1 and the driving pawl 2 be rotatably connected with each other for this purpose.

In the in the 1 illustrated embodiment are the pawl 1 and the driving pawl 2 At least slightly pivotable relative to each other. Here are the pawl 1 and the driving pawl 2 via a pin-slot pairing with each other, wherein on the bearing portion 10 the pawl 1 a parallel to the pivot axis D3 protruding engagement pin 12 is formed, in a slot 21 at a storage section 20 the driving pawl 2 intervenes. The engagement pin 12 the pawl 1 defines a stop area for the driving pawl 2 , beyond which the driving pawl 2 not relative to the pawl 1 can be pivoted. The driving pawl 2 is here also on a non-illustrated spring element - preferably in the form of a leg spring - in a pivoting direction (here clockwise) biased. The spring element is supported by a first spring arm on the driving pawl 2 and with another spring arm on a recliner-proof cover 7 (see 5A ) to the driving pawl 2 pretension. About the spring element is the driving pawl 2 thus against the engagement pin 12 the pawl 1 in a pivoting direction (here clockwise) biased. Through the pin-slot pairing between pawl 1 and driving pawl 2 and the springing of the driving pawl 2 becomes the Mitnehmerklinke 2 automatically adjusted in the preloaded pivoting direction when the pawl 1 and thus the engagement pin 12 is relocated. At the same time, a relative movement of the pawl via the pin-slot pairing 1 to the driving pawl 2 allowed, the relative movement mainly by the dimensions of the slot 21 is limited.

At the driving pawl 2 is a takeaway hook 26 formed when releasing the over the pawl 1 and the locking disc 5 provided locking and folding the backrest R in the direction of the seat on a ratchet counter surface 62 (see 2 B ) of the actuating ring 6 can attack. The actuating ring 6 is pivotally mounted on the seat part-side adapter AS about the pivot axis D1 and communicates with the locking device for the seat-length adjustment. By the attack of the driving pawl 2 over her takeaway hook 26 on the actuating ring 6 this is rotated when folding the backrest R about the pivot axis D1, whereby the locking device for the seat-length adjustment is actuated to release its locking.

On the seat part side adapter AS is still a comfort locking element 4 arranged pivotally. With this comfort locking element 4 arrives the pawl 1 in a folded position of the backrest (see 2C and 2D ) to lock the backrest R in the folded-forward position. The pawl 1 points for this purpose on her locking arm 13a an additional, second engagement portion with a locking pin 14 on. This locking pin 14 is at a front end of the lock arm 13a provided and can be in a folded position of the backrest R, in which the pawl 1 with her locking arm 13a to the comfort locking element 4 was introduced by the comfort locking element 4 be underrun. This is the locking pin 14 the pawl 1 on the comfort locking element 4 About a locking area 44 of the comfort locking element 4 behind (compare 5C ) to lock the backrest R in its pre-folded easy-entry position.

A folding back of the backrest R from the thus locked forward folded position is only possible again when the pawl 1 and the comfort locking element 4 be disengaged. This is the comfort locking element 4 coupled with the locking device for the seat-length adjustment, so that the comfort locking element 4 the locking pin 14 the pawl 1 automatically releases as soon as the seat frame of the vehicle seat reaches an original seat longitudinal position again, which had taken the seat frame before folding the backrest R and Nachvorneschieben the seat frame. Equally, in the present case, a possibility is provided by operating the Reibdaumens 3 the pawl 1 out of engagement with the comfort locking element 4 Even if the original seat long position has not been resumed. This is the locking area 44 of the comfort locking element 4 designed so that the locking pin 14 also by a (overstroke) pivoting movement of the pawl 1 in the release direction out of engagement with the locking area 44 brought and can be moved along this. This is intended as well as the easy-entry function of the illustrated vehicle seat and the illustrated seat fitting B with a view to the 2A to 2D and 3A to 3C will be explained in more detail.

With the 2A to 2D different successive phases when folding the backrest R and thus triggered release of the seat-length adjustment is illustrated.

In order to release the locking of the backrest R and freely pivot the backrest R relative to the seat portion of the vehicle seat and to be able to fold forward in the direction of the seat, an actuating mechanism is actuated, for example by a vehicle occupant, including the Reibdaumen 3 belongs. For this purpose, for example, an operating handle on the side or in the upper region of the backrest L are actuated, with the Reibdaumen 3 is in communication and to a rotation of the Reibdaumens 3 about its pivot axis D2 (here counterclockwise) leads. By this rotation of the Reibdaumens is the operating portion 31 of the friction thumb 3 no longer on the locking arm 13a and comes into contact with the release arm 13b the pawl 1 ,

By the force attack of the Reibdaumens 3 on the release arm 13b becomes the pawl 1 in one of the direction of rotation of the Reibdaumens 3 opposite pivoting direction pivoted about its pivot axis D3. This causes the pawl 1 out of engagement with the locking disc 5 , With the pivoting movement of the pawl 1 is caused by the springing of the driving pawl 2 a nearly synchronous pivoting movement of the driving pawl 2 triggered in the same pivoting direction (clockwise) about the common pivot axis D3. This takes the Mitnehmerklinke 2 a coupling position on the non-fixed adapter AL. In this coupling position engages the driving hook 26 the driving pawl 2 when folding the backrest R in the direction of the seat on the ratchet counter surface 62 of the actuating ring 6 on, which is rotatably mounted on the seat part fixed adapter AS and is in operative connection with the locking device for the seat-length adjustment. This is especially true in the 2 B illustrated.

When further folding the now no longer locked backrest R is the locking arm 13a the pawl 1 on a non-toothed, radial lateral surface 50 the locking disc 5 guided along until the backrest R occupies a maximum possible folded position. This maximum folded position is in the 2C shown. Here is by the co-rotation of the actuating ring 6 due to the engaging thereon Mitnehmerklinke 2 the lock on the locking device of the seat-length adjustment, so that the seat frame of the vehicle seat can be moved longitudinally forward to facilitate entry or exit from the vehicle for rear passengers.

In the maximum folded position of the backrest R is also the locking pin 14 the pawl 1 partly on the seat part side comfort locking element 4 passed so that the locking pin 14 by pivoting the comfort locking element 4 around a provided on the seat side adapter AS pivot axis D4 can be engaged behind. This is in the 2D shown.

Here is the backrest R starting from the position of use 2A To a maximum Vorklappwinkel of, for example, about 40 to 50 ° folded forward and completely solved a lock on the locking device of the seat-length adjustment. By the pawl 1 with her locking pin 14 with the comfort locking element 4 is engaged, the backrest R is also locked in its folded-forward position, so that the backrest R does not have to be manually held in the folded-forward position when the seat frame is moved.

The backrest R is over the comfort locking element 4 held in their maximum folded position until the seat frame resumes the original seat longitudinal position. The comfort locking element 4 this is the case with the locking device of the seat-length adjustment coupled, that upon retraction of the seat frame and upon reaching the originally occupied seat longitudinal position, the comfort locking element 4 pivoted back about its pivot axis D4 (here counterclockwise) and only then the pawl 1 releases again.

In order to avoid that a folding back of the backrest R is also possible if the original seat longitudinal position can not be taken again, the locking device V is presently designed so that on the Reibdaumen 3 on the pawl 1 can be acted upon the locking pin 14 out of engagement with the comfort locking element 4 bring to. So it may happen that the vehicle seat can not be pushed back into the original seat longitudinal position due to an obstacle, but still the backrest R should be folded back. This can be done via the friction thumb 3 in the folded position of the backrest R on the release arm 13b the pawl 1 be acted upon by the locking pin 14 in the overstroke from the lock with the comfort locking element 4 to lift. The pawl 1 This is pivoted by an overstroke swivel angle in the (release) pivoting direction, in which also the pivoting of the pawl 1 for releasing the lock with the locking disc 5 and thus to release the backrest R is done. This is in the 3A illustrated in more detail.

The locking pin 14 is here on the still located in the locking position comfort locking element 4 lifted, leaving the locking pin 14 no longer in engagement with the comfort locking element 4 stands and when folding back the backrest R to a guide surface 41 the comfort locking element is guided along ( 3B ).

In the course of the over-stroke movement of the pawl 1 for releasing the lock with the comfort locking element 4 If necessary, it is also coupled with the Mitnehmerklinke 2 pivoted. By the pawl 1 about the pin-slot pairing relative to the Mitnehmerklinke 2 is pivotable, the pawl can 1 but initially about one over the dimensions of the slot in the overtravel 21 predetermined adjustment can be pivoted without the spring-loaded driving pawl 2 is relocated. Although this is not absolutely necessary, but minimizes the friction and thus the applied adjusting force to release the comfort locking. Reached the backrest R according to the 3C again its use position, locks the pawl 1 again automatically with the locking disc 5 and is in the thus assumed locking position on the on the locking arm 13a attacking friction thumb 3 secured.

By the arrangement of pawl 1 , Driving pawl 2 , Friction thumb 3 and comfort locking element 4 only on the backrest outside of the backrest R and on a fitting side of the seat fitting B, an extremely compact seat fitting B is created, which greatly facilitates the installation of the seat fitting B and the vehicle seat. In addition, through the formation of different engagement areas on the pawl 1 , on the one hand for crash locking with the locking disc 5 and on the other hand for the comfort locking with the comfort locking element 4 are designed and provided, only the direct movement of the pawl 1 a direct impact on the easy-entry features. A tolerance-dependent dependence between crash locking and free pivoting of the backrest R and the comfort locking is thus significantly minimized.

The illustrated one-sided fitting structure also offers the advantage that an inner side of the backrest-side adapter AL, the backrest adapter plate, is completely available for fixing to the backrest side part L. Thus, on the outside of the adapter AL are the pawl 1 , the driving pawl 2 and the friction thumb 3 pivoted. The cooperating and adjustably mounted on the seat fitting B components of an actuating mechanism, the locking device V and the coupling mechanism 2 . 6 are thus completely on a backrest outside. Such need on the back inside of the backrest inner part L no components of the locking device V or the coupling mechanism 2 . 6 to be ordered.

This offers the advantage that on the inside of the backrest side part L of the backrest R matching areas can be used for fixing a seat fitting, regardless of whether a vehicle seat should be equipped with an easy-entry function or not. For example, the seat fitting B of 1 . 2A - 2 B and 3A - 3C be welded on its back part adapter AL at the same welding areas with a backrest side part L, where a seat fitting would be welded, which only allows a tilt adjustment of the backrest and no easy-entry function provides. In an assembly process in which vehicle seats of a seat platform are to be produced in different types, for example for two- or three-door vehicles with easy-entry function on the one hand and for four- or five-door vehicles without easy-entry function on the other hand, thus matching welding areas an inside of the backrest side part to Welding be used with the respective seat fitting. This is explained in the following 4A to 4C and 5A to 5C illustrated in more detail.

The 4A . 4B and 4C show in perspective view overlooking the back outside, in sectional view and in perspective view overlooking the back inside a detail of a vehicle seat of a first type with a first variant of a seat fitting B *, in which no easy-entry function is provided. Consequently, here the vehicle seat or the seat fitting B * no locking device V and no coupling mechanism 2 . 6 to the locking device for the seat longitudinal adjustment. Rather, the seat fitting B * only serves to adjust the inclination of the backrest R in a position of use relative to a seat part, not shown here, with the seat surface of the vehicle seat. It is only one designed as an adapter plate seat side adapter AS * of the seat fitting B * provided, which is to be fixed to the seat part of the vehicle seat, and no second part-side adapter.

The seat fitting B * has in a known manner for inclination adjustment two fittings B1 and B2, which are respectively associated with the backrest R or the seat part. In the present case, one fitting part B2 of the backrest R is assigned and welded directly to the backrest side part L. The fitting part B2 thus forms that part of the seat fitting B * over which the reclining side fixing of the fitting B * takes place. For this purpose, a plurality of welds S1 in the region of a fitting opening of the backrest side part L are provided on the inside of the backrest side part L, to which the externally attached fitting part B2, for example, by means of laser welding to the backrest side part L is welded.

Both 5A . 5B and 5C is also a perspective view overlooking the back outside, in sectional view and in perspective view overlooking the back inside the embodiment of the previously explained 1 . 2A to 2D and 3A to 3C with a vehicle seat with easy-entry function and the seat fitting B shown. Due to the one-sided fitting structure of the seat fitting B and thus the lack of necessity, on the inside of the backrest side part L components of the locking device V or the coupling mechanism 2 . 6 to have to provide, the same welds S1 can be used to fix the seat fitting B as for the fixation of the seat fitting B * of the backrest side part L. 4A to 4C without easy-entry function.

On the inside of the backrest side part L additional welds S21 and S22 are still provided, on which a welding with the back part side adapter AL of the Easy-entry seat fitting B takes place. These welds S21 and S22 remain unused in a seat fitting B * without easy-entry function for a vehicle seat for a four- or five-door vehicle.

For the installation of vehicle seats of different types - for example, for two- or three-door vehicles on the one hand and four- or five-door vehicles on the other - thus the same welds S1 can be used for the fixation of the respective seat fitting B or B *. In the case of a seat fitting B * for a vehicle seat without an easy-entry function, no backrest-side adapter, for example in the form of a backrest adapter sheet, also has to be used. This is otherwise regularly necessary if for the different types of vehicle seats to be mounted no matching (welding) areas for the fixation of different seat fittings on the backrest side part L can be used.

LIST OF REFERENCE NUMBERS

1

Pawl (locking element)

10

bearing section

12

Engaging pin (stopper area)

13a

lock

13b

release arm

14

locking pin

15

1. Intervention area

2

Driving pawl (driving element)

20

bearing section

21

Long hole

26

driving hook

3

Friction thumb (actuator)

30

bearing section

31

actuating section

4

Comfort locking element

41

guide surface

44

locking area

5

Locking disc (blocking element)

50

lateral surface

51

ratchets

6

Actuating ring (coupling element)

62

Pawl counter surface

7

cover

AL

Adapter (backrest side)

AS, AS *

Adapter (seat side)

B, B *

seat fitting

B1, B2

fitting part

D1, D2, D3, D4

Rotary / swivel axis

L

Backrest side part

R

backrest

S1, S21, S22

weld

V

locking device

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202008008312 U1 [0004, 0005, 0016]
• DE 102006061037 B3 [0006]
• DE 102008061037 B3 [0006]

Claims (16)

Vehicle seat comprising at least: - a seat frame which is adjustable in the longitudinal direction; - a seat adjustment device for locking the seat frame in a seated longitudinal position; - a seat backrest (R) pivotally mounted to the seat frame via a seat fitting (B) about a pivot axis (D1); , - a locking device (V) for locking the backrest (R) in a use position, wherein the locking device (V) is a locking element ( 1 ) and a blocking element ( 5 ) and the locking element ( 1 ) for locking the backrest (R) with the locking element ( 5 ) is engaged and for folding the backrest (R) in the direction of a seat surface of the seat frame out of engagement with the locking element ( 5 ), and - a coupling mechanism ( 2 . 6 ) for coupling the locking device (V) for the backrest (R) with the locking device for the seat-length adjustment, wherein the coupling mechanism ( 2 . 6 ) at least one with the locking device (V) operatively connected driver element ( 2 ) and with the locking device operatively connected coupling element ( 6 ) and the driver element ( 2 ) when folding the backrest (R) on the coupling element ( 6 ) can act, so that with the folding forward of the backrest (R), the locking of the locking device is released and the seat frame is adjustable in the longitudinal direction, characterized in that the locking element ( 1 ) and the driver element ( 2 ) on one and the same fitting side of the seat fitting (B) are arranged, which defines either an inside or one of the inside in the direction of the pivot axis (D1) of the backrest (R) opposite the outside of the seat fitting (B). Vehicle seat according to claim 1, characterized in that the locking element ( 1 ) and the driver element ( 2 ) are arranged on an outer side of the seat fitting (B). Vehicle seat according to claim 1 or 2, characterized in that the locking element ( 1 ) and the driver element ( 2 ) are arranged on one side of a backrest adapter (AL) of the seat fitting (B), which is fixed to the backrest (R). Vehicle seat according to one of claims 1 to 3, characterized in that the locking element ( 1 ) with the driver element ( 2 ) is coupled such that during an adjustment of the locking element ( 1 ) for releasing the backrest (R) an adjustment of the driver element ( 2 ) takes place in a coupling position in which in a subsequent folding forward of the backrest (R), the driver element ( 2 ) on the coupling element ( 6 ) can act. Vehicle seat according to one of the preceding claims, characterized in that the locking element ( 1 ) and the driver element ( 2 ) are pivotable, in particular about the same axis of rotation (D3). Vehicle seat according to one of the preceding claims, characterized in that the driver element ( 2 ) relative to its axis of rotation (D3) next to the locking element ( 1 ) is arranged. Vehicle seat according to one of the preceding claims, characterized in that the locking element ( 1 ) and the driver element ( 2 ) are at least slightly adjustable relative to each other, in particular pivotally mounted. Vehicle seat according to claim 7, characterized in that the pivotable driving element ( 2 ) is biased in at least one spring element in a pivoting direction and the locking element ( 1 ) a stop area ( 12 ), which pivoting of the driver element ( 2 ) is limited in this pivoting direction. Vehicle seat according to one of the preceding claims, characterized in that a comfort locking element ( 4 ) is provided, with which the locking element ( 1 ) in a folded-back position of the backrest (R) engages to lock the backrest (R) in the folded-forward position. Vehicle seat, in particular a vehicle seat according to one of claims 1 to 9, having at least - a seat frame, - a backrest (R) pivotally mounted on the seat frame via a seat fitting (B), - a locking device (V) for locking the backrest (R) in a use position, wherein the locking device (V) is a locking element ( 1 ) and a blocking element ( 5 ) and the locking element ( 1 ) for locking the backrest (R) with the locking element ( 5 ) is engaged and for folding the backrest (R) in the direction of a seat surface of the seat frame out of engagement with the locking element ( 5 ), and - a comfort locking element ( 4 ), with which the locking element ( 1 ) in a folded-back position of the backrest (R) in order to lock the backrest (R) in the folded-forward position, characterized in that the locking element ( 1 ) a first intervention area ( 15 ) for locking with the locking element ( 5 ) in the use position of the backrest (R) and a different second engagement region for locking with the comfort locking element ( 4 ) in a folded-back position of the backrest (R). Vehicle seat according to one of the preceding claims, characterized in that the locking device (V) is an actuating element ( 3 ), via which on the locking element ( 1 ) can be acted to the locking element ( 1 ) out of engagement with the blocking element ( 5 ) and to be able to fold the backrest (R) in the direction of the seat. Vehicle seat according to one of claims 9, 10 or 11, characterized in that the locking element ( 1 ), the driver element ( 2 ), the actuating element ( 3 ) and / or the comfort locking element ( 4 ) are arranged on the same fitting side. A method for mounting a vehicle seat having at least one longitudinally adjustable seat frame and a seat fitting (B, B *) pivotally mounted on the seat frame backrest (R) and with different variants of seat fittings (B, B *) with or without Locking device (V) and coupling mechanism ( 2 . 6 ) is mountable, wherein - by means of the locking device (V), the backrest (R) can be locked in a use position by a locking element ( 1 ) of the locking device (V) with a blocking element ( 5 ) of the locking device (V) is engaged, and by means of the locking device (V), a folding forward of the backrest (R) in the direction of a seat surface of the seat frame is made possible by the locking element ( 1 ) out of engagement with the blocking element ( 5 ), - by means of the coupling mechanism ( 2 . 6 ) the locking device (V) for the backrest (R) with a locking device for the seat longitudinal adjustment can be coupled and the coupling mechanism ( 2 . 6 ) for this purpose at least one with the locking device (V) operatively connected driver element ( 2 ) and with the locking device operatively connected coupling element ( 6 ), so that the driver element ( 2 ) when folding the backrest (R) on the coupling element ( 6 ) can act and with the folding forward of the backrest (R) the locking of the locking device is released, - at least one seat fitting (B) with locking device (V) and coupling mechanism ( 2 . 6 ) and a seat fitting (B *) without locking device (V) and coupling mechanism ( 2 . 6 ), with which the vehicle seat is optionally mountable, and - the backrest has a backrest side part (L) on which a part (AL, B2) of the respective seat fitting (B, B *) to fix, in particular to be welded, characterized in that - a seat fitting (B) with a locking device (V) and a coupling mechanism ( 2 . 6 ) is provided, wherein the locking element ( 1 ) and the driver element ( 2 ) are arranged on the same fitting side of the seat fitting (B), and - a part (AL, B2) of the respective seat fitting (B, B *) is always fixed to a certain area of the backrest side part (L), regardless of whether a Locking device (V) and a coupling mechanism ( 2 . 6 ) are provided or not. A method according to claim 13, characterized in that in a vehicle seat of a first type with locking device (V) and coupling mechanism ( 2 . 6 ) a specific area of a backrest side part (L) is welded to an adapter of a seat fitting (B) of a first variant and in a vehicle seat of a second type without locking device (V) and coupling mechanism ( 2 . 6 ) the same area of the backrest side part (L) with a fitting part (B2) of a seat fitting (B *) of a second variant is welded. A method according to claim 13 or 14, characterized in that for fixing different variants of seat fittings (B, B *) with or without locking device (V) and coupling mechanism ( 2 . 6 ) the same welds (S1) on an inner side of the backrest side part (L) can be used. Seat fitting for a vehicle seat with a longitudinally adjustable seat frame and a backrest (R) which can be folded forward in the direction of a seat surface of the vehicle seat about a pivot axis (D1), wherein the seat fitting (B) is designed and provided for the backrest (R) in a use position to lock relative to the seat and to allow folding of the backrest (R), and comprising at least the following: - a locking device (V) for locking the backrest (R) in a use position, wherein the locking device (V) is a locking element ( 1 ) and a blocking element ( 5 ) and the locking element ( 1 ) for locking the backrest (R) with the locking element ( 5 ) is engaged and for folding the backrest (R) in the direction of a seat surface of the seat frame out of engagement with the locking element ( 5 ), - a coupling mechanism ( 2 . 6 ) for coupling the locking device (V) for the backrest (R) with a locking device for the seat-length adjustment, wherein the coupling mechanism ( 2 . 6 ) at least one with the locking device (V) operatively connected driver element ( 2 ) and a Coupling element ( 6 ) and the driver element ( 2 ) when folding the backrest (R) on the coupling element ( 6 ) can act, so that with the folding forward of the backrest (R) via the coupling element ( 6 ) the locking of the locking device is released and the seat frame is adjustable in the longitudinal direction, and - a backrest adapter (AL) to be fixed to a backrest side part (L) of the backrest (R), in particular to weld and on the parts of the locking device (V) and / or the coupling mechanism ( 2 . 6 ), characterized in that the locking element ( 1 ) and the driver element ( 2 ) are arranged on one and the same side of the backrest adapter (AL), which in intended arrangement of the seat fitting (B) on a vehicle seat either an inside or one of the inside in the direction of the pivot axis (D1) of the backrest (R) opposite the outside of the backrest adapter ( AL).

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