DE102019122542B4 - Vehicle seat and commercial vehicle cab with vehicle seat - Google Patents

Abstract

Vehicle seat (100) extending along a height axis (Z) and a width axis (Y), comprising a seat part (5) and a backrest element (4) which extends along a height axis (Z') and in a width axis (Y') wherein the backrest element (4) has a central structure (1) extending along the height axis (Z'), which is arranged centrally along the width axis (Y') and in a base structure extending essentially along the width axis (Y'). (2), the backrest element (4) having at least one stability element (8) which extends away from the central structure (1) along the width axis (Y'), the base structure (2) being in a holding structure (6) of the vehicle seat (100) is arranged pivotably, so that the backrest element (4) can be pivoted about a first pivot axis (3), characterized in that the first pivot axis (3) along the vertical axis (Z) of the vehicle seat (100) about a first distance (37) from the seat part (5), a headrest part (9) being arranged on the central structure (1) and being displaceable along the height axis (Z'), a guide device (39) being provided, in which a second arm element (40) of the headrest part (9) is guided along the height axis (Z'), the second arm element (40) being pivotable about a pivot axis (S) extending along the width axis (Y'), the pivoting of the second arm element (40), the headrest part (9) can be pivoted forward to a depth axis (X') of the backrest element (4).

Description

The invention relates to a vehicle seat according to the preamble of claim 1 and a commercial vehicle cab with a vehicle seat.

A vehicle seat of the type mentioned is made DE 11 2014 000 389 T5 famous. A commercial vehicle cab with a vehicle seat is in DE 10 2012 018 351 A1 described.

Vehicle seats with backrest elements are well known from the prior art. In utility vehicle cabs, it is often desirable for the interior space to be able to be used in a wide variety of ways, for example to provide a place to sleep or a place to cook. However, in commercial vehicle cabs that are built in series, the available interior space is often limited. The vehicle seats, in particular the front passenger seat, should therefore be stowable or foldable to save space.

In the case of commercial vehicles, it can be assumed that people will have to stay in the vehicle seats for long periods of time. It is therefore desirable that the vehicle seats avoid malpositions and ensure maximum comfort.

In addition, it is desirable for the vehicle seats to have as little dead weight as possible in order to reduce the weight of the commercial vehicle. Likewise, the vehicle seats should be able to be produced as cheaply as possible without impairing the stability and safety requirements.

It is therefore the object of the present invention to provide a vehicle seat and a commercial vehicle cab with a vehicle seat which solve the problems described at the outset.

The object relating to the vehicle seat is solved by a vehicle seat according to claim 1. Further preferred embodiments are described in the dependent claims.

The vehicle seat according to the invention, with an extension along a height axis Z and a width axis Y, comprises a seat part and a backrest element, which extends along a height axis Z′ and in a width axis Y′. The backrest element has a central structure that extends along a height direction Z1, which is arranged centrally along the width axis Y' and ends in a base structure that essentially extends along the width axis Y', with the backrest element having at least one stability element, which extends along the Width axis Y' extending away from the central structure, the base structure being arranged pivotably in a support structure of the vehicle seat, so that the backrest element can be pivoted about a first pivot axis, the first pivot axis being spaced apart from the seat part along a height axis Z of the vehicle seat.

The vehicle seat according to the invention can be provided as a driver's seat or as a passenger seat.

The vehicle seat thus extends along the height axis Z, the width axis Y and a depth axis X. Two directions can be assigned to the respective axes. Thus, the height axis Z includes the directions Z1 (up) and Z2 (down). The width axis Y includes the directions Y1 (to the right) and Y2 (to the left). The depth axis X includes the directions X1 (forward) and X2 (backward).

The backrest element extends along the height axis Z', the width axis Y' and a depth axis X'. Two directions can also be assigned to these respective axes. Thus, the vertical axis Z' includes the directions Z'1 (upward) and Z'2 (downward). The width axis Y' includes the directions Y'1 (to the right) and Y'2 (to the left). The depth axis X' includes the directions X'1 (forward) and X'2 (backward).

The term "essentially" used should be interpreted in such a way that minor tolerance deviations are also claimed. Thus, the deviation can be an angle of preferably less than 10°, more preferably less than 7.5°, even more preferably less than 5°. This also applies to the expressions "substantially" used below.

In a preferred initial state, the axes Z, Y, X of the vehicle seat, or the associated directions, would be parallel to the axes Z′, Y′, X′ of the backrest element, or to the correspondingly associated directions. In a pivoting according to the invention about the first pivot axis, the height axis of the vehicle seat and the height axis of the backrest element would enclose an angle α, which is preferably greater than 0° and preferably less than ±90°. Accordingly, the angle α would lie in the interval [0°, ±90°]. Likewise, the depth axes X and X' would enclose a corresponding angle.

A stability element is to be understood as meaning elements which serve to support/stabilize the person in the seat. the Such stability elements can be, for example, struts, strut elements or plate-like elements. The stability elements can preferably be provided to support certain body regions. For example, support for the lower back or the lumbar region, the upper back or the shoulder region, and the head can be provided. The stability elements extend away from the central structure or longitudinal structure. This central structure can advantageously absorb the forces acting on the stability elements and transfer them to the base structure, since this force-absorbing central structure is supported on the base structure. The base structure is firmly connected to the force-absorbing central structure or is formed integrally with it. “Integrally formed” is to be understood as meaning that the two elements are formed in one piece or in one piece. A fixed connection of the base structure to the central structure can be achieved, for example, by a fixation, for example by a screw connection, a plug connection, a rivet connection or a welded connection.

The first pivot axis advantageously runs at least in sections through the base structure and the holding structure. According to the invention, the centrally arranged rear central structure is supported on the underside on a pivot axis which is preferably aligned horizontally or along the width axis Y of the vehicle seat or based on the horizontal or the width axis Y. In this way, this rear central structure/longitudinal structure and the pivot axis are suitable for pivoting the backrest forwards and backwards, it being crucial that this pivot axis is elevated relative to the seat part in the support structure, which extends upwards from the seat part in its rear extends, is arranged.

According to the invention, the first pivot axis is spaced apart from the seat part in a vertical direction Z of the vehicle seat. The pivot axis preferably runs at least in sections through the base structure. Accordingly, it is also preferred that the base structure is spaced from the seat portion.

The distance between the pivot axis and the seat part is advantageously dimensioned in such a way that the pivot axis is located in the area of the lumbar spine.

Advantageously, the seat part comprises an upholstery element on which the person sits. Furthermore, the seat part can comprise a corresponding receiving element which receives or holds the upholstered element. Furthermore, it is advantageous if the backrest element is provided with at least one cushion element. The at least one cushion element is preferably held by the at least one stability element. The backrest element and the at least one upholstered element therefore advantageously form the backrest of the vehicle seat. Of course, it would also be conceivable for an upholstery element to be provided neither on the seat part nor on the backrest element. Accordingly, only a seat or a support surface would be provided, which would contact the user.

The preferred padding elements on the backrest element protrude forward along the depth direction X'1. Accordingly, it is preferred that a first distance between the pivot axis and the seat part corresponds to at least a second distance which exists between the upholstery surface in a lower third of the back surface and the pivot axis. In this case, the first distance is from the surface of the seat part which is in contact with the user and which is advantageously the surface of the corresponding upholstery element. Such a configuration of the first distance makes it possible to pivot the backrest or the backrest element forwards by -90°. The central structure would then be arranged essentially parallel to the seat part. Likewise, the height axis Z' of the backrest element would be arranged essentially parallel to the depth axis of the vehicle seat. The term "substantially" means a slight tolerance deviation. Such a deviation from the parallelism of the named elements or axes can be in a range from 0° to 10°, preferably in a range between 0° and 7.5°, more preferably in a range from 0° to 5° . The vehicle seat can be stowed in a particularly space-saving manner due to the backrest element being arranged essentially parallel to the seat part.

An advantageous passenger vehicle seat or driver's seat can therefore be stowed in the folded-down state in the rear area of the commercial vehicle cab in a space-saving manner. As a result, an increased space requirement can be made available in the front area of the commercial vehicle cab, for example for setting up a table for eating.

Such an advantageous passenger or driver's seat can be changed in such a way that the entire backrest element can be folded down onto the seat part, so that a rear side of the backrest element is arranged almost horizontally. This vehicle seat can then preferably be folded backwards move. A guide system can advantageously be provided for this purpose. This guide system can advantageously include rails embedded in the body floor or rails mounted on top. It is advantageous here for the seat to have rail elements or roller elements or sliding blocks or the like designed in a complementary manner on its underside, in order to enable the vehicle seat to be displaced in the forward and backward direction.

Advantageously, the vehicle seat can be locked in the unfolded state, ie when it is arranged in the front area of the commercial vehicle cab in its normal driving state, by means of a locking device in order to ensure driving safety for the person. This locking device can be operated, for example, by means of a lever element or a Bowden cable.

The vehicle seat can preferably also be locked in the folded-in state when it is arranged to the rear in the rear region of the commercial vehicle cab underneath a sleeping bed or the like. This can be done by means of the locking device or by means of additional latching elements.

The first distance between the pivot axis and the seat part is advantageously in a range between 2 cm and 30 cm, more preferably the first distance is in a range between 5 cm and 25 cm. Even more preferably, the first distance is in a range between 5 cm and 15 cm.

The pivot axis is preferably arranged running in the horizontal direction behind the backrest element and at the same time holds the entire backrest element. The backrest element is preferably arranged separately from the seat part.

The holding structure of the backrest element, also known as the backrest construction, is advantageously a receiving frame. According to a preferred embodiment, the holding structure has two holding legs or U-legs extending along the vertical axis Z of the vehicle seat. Advantageously, the holding legs on the seat part are each arranged on an outer edge of the seat part along the width axis Y of the vehicle seat.

Advantageously, the holding structure is U-shaped. The holding structure preferably has a cross brace which extends along the width axis Y and connects the two holding legs. The cross brace of the U-shaped holding structure is advantageously integrated in the seat part or a section of the seat part.

The seat part advantageously comprises a receiving element for the upholstered element or the seat surface. This receiving element can be manufactured in such a way that it has a corresponding stability which is sufficient for a corresponding input of force through the holding legs. It would thus be conceivable for the holding structure to consist of the holding legs and a section of the seat part or the receiving element for the upholstered element or the seat surface, preferably a section which extends along the width direction Y. However, it would also be conceivable for the cross brace to be arranged in or on the seat part. This is particularly advantageous when the seat part or the seat for the upholstered element is not designed sufficiently for the application of force by the holding elements. The cross brace could advantageously be connected to a seat substructure, by means of which the seat is connected to the vehicle body.

The holding structure can therefore preferably be designed in one piece or in multiple pieces.

According to a further preferred embodiment, the backrest element comprises a lower part which is arranged along the height axis Z' below the first pivot axis and an upper part which is arranged along the height axis Z' above the first pivot axis. Since the first pivot axis increases, ie extends at a certain distance from the seat part, the backrest element or the rear central structure can pivot forwards and backwards with the at least one stability element. When the upper part of the backrest element located above the first pivot axis is pivoted backwards, i.e. in direction X2, the lower part of the backrest element located below the first pivot axis is pivoted forwards, i.e. along direction X1. This can bring about an advantageous lordosis/kyphosis support.

According to a further preferred embodiment, the base structure is dimensionally stable. This allows the forces to be introduced through the central structure and ensures appropriate stability. The base structure can be arched, so that the base structure extends to the rear, ie along the depth direction X′2. The base structure is preferably formed integrally, ie in one piece and/or in one piece with the central structure. Preferably, the base structure at its along the Width axis Y 'of the backrest element outer edges on a bearing shaft element, which is rotatably or pivotally arranged in a pivot bearing of a holding leg. It would be conceivable that a bearing shaft element runs through the base structure over the entire width of the base structure and is arranged in the pivot bearings of the two holding legs. However, it would also be possible for a receptacle to be provided on the respective edges of the base structure, in each of which a bearing shaft element is fixedly arranged. The respective bearing shaft element is then mounted in the corresponding pivot bearing of the holding leg. Advantageously, the pivot bearing on the respective holding leg includes a receptacle for the respective bearing shaft element, or for the respective end of the bearing shaft element running through. This receptacle is preferably designed in such a way that a smooth rotation of the bearing shaft element is made possible. This can be made possible, for example, by a ball bearing.

According to a preferred embodiment, the pivot mounting of the holding legs along the height axis Z is adjustable. As a result, the distance between the first pivot axis and the seat part can be adjustable. The lordosis/kyphosis support could thus be adapted to the user.

According to a further preferred embodiment, the vehicle seat includes a locking mechanism, by means of which the pivoting of the backrest element about the first pivot axis can be locked. By providing a locking mechanism, a desired inclination of the backrest element can be set. Such a locking mechanism can, for example, comprise a detachable toothing of a locking element in a toothed element. The toothed element advantageously has a section in the shape of a segment of a circle and the locking element is acted upon by a spring force. The toothing can be released via an operating element. Such an operating element could be a lever element, an actuator or a Bowden cable. Advantageously, the locking mechanism could be provided on the pivot bearing of the bearing shaft element or integrated into it.

According to a further preferred embodiment, the vehicle seat includes a resetting mechanism, by means of which a pivoting of the backrest element about the first pivoting axis can be reset to a starting position. This starting position could preferably be the position in which the backrest element is aligned essentially perpendicular to the seat part. The resetting mechanism can, for example, comprise an elastic element or a torsion spring. Advantageously, the resetting mechanism could be provided on the pivot bearing of the bearing shaft element or integrated into it.

According to a further preferred embodiment, the backrest element comprises a stability element in the form of a first plate-like element. The first plate-like element is preferably arranged along the height axis Z′ in a lower area of the central structure. The first plate-like element preferably extends along the height axis Z′ of the backrest element beyond the pivot axis in the direction of the seat part. The first plate-like element preferably extends along the height axis Z′ of the backrest element beyond the base structure in the direction of the seat part. Advantageously, the lower part of the backrest element is the lower section of the first plate-like element that protrudes beyond the pivot axis. The preferred extension of the first plate-like element is not unimportant. Advantageously, the first plate-like element extends at least two thirds of the distance between the pivot axis and the seat part or the seat part surface. More preferably, the first plate-like element extends at least three quarters of the distance between the pivot axis and the seat part or the seat part surface. Advantageously, the upholstery element arranged on the backrest element contacts the upholstery element of the seat part.

According to a further advantageous embodiment, the first plate-like element is arranged pivotably on the central structure and/or is designed to be flexible at least in sections. This advantageously enables pivoting and/or deformation of the first plate-like element in the radial direction about a second pivot axis. The second pivot axis preferably extends essentially along the vertical axis Z′. The term "essentially" used should be interpreted in such a way that minor tolerance deviations are also claimed. Thus, the deviation can be an angle of preferably less than 10°, more preferably less than 7.5°, even more preferably less than 5°. The second pivot axis preferably runs parallel to the vertical axis Z'. Pivoting of the first plate-like element can be made possible by providing a joint element or an elastically deformable element, by means of which the first plate-like element is attached to the central structure. Cumulatively or alternatively, the first plate-like element can fle at least in sections be equipped flexibly, so that twisting or torsion of the first plate-like element can take place about the second pivot axis. Due to the pivoting and/or the deformation, it is possible that when the user rotates, the first plate-like element lying against the user can follow this rotation. The lower back thus remains supported by the user's turning movement, which prevents the user from adopting an incorrect position and increases seating comfort.

According to a further preferred embodiment, the central structure has at least one support element extending along the height axis Z′. This support element is preferably connected to the base structure on the underside. The central structure advantageously has two support elements which extend along the height axis Z′ and are connected to the base structure on the underside. It is advantageous here that the support elements are spaced apart along the width axis Y′. As a result, an optimal introduction of force into the base structure can take place and optimal stability of the central structure is ensured. Furthermore, a central section of the base structure can preferably be reinforced in order to ensure sufficient stability for a corresponding introduction of force.

The backrest element advantageously has two stability elements which are designed in the form of rib elements. Advantageously, the rib elements are arranged along the height axis Z' above the first plate-like element. Preferably, the rib elements each have an extension along the width axis Y′. Preferably, a first rib element extends in the opposite direction to the second rib element. Thus, the first rib member would have an extension to the left along the width direction Y'2 and the second rib member would have an extension to the right along the width direction Y'1. These stability elements in the form of rib elements advantageously serve to support the shoulder area of the user. Advantageously, the rib elements are P-shaped. Furthermore, it is preferred if the rib elements also extend forward, ie along the depth direction X'1. This achieves better seating comfort.

The rib elements are preferably arranged on the central structure or formed integrally with it. Advantageously, one rib element is arranged on each support element or one rib element is formed integrally with a support element. Integrally designed means a one-piece design of the rib elements and the support elements. A rib element can be arranged on a support element, for example, by being fixed, for example by a screw connection, a plug-in connection, a rivet connection or a welded connection.

According to a further advantageous embodiment, the rib elements are arranged pivotably on the central structure and/or are designed to be flexible at least in sections. This advantageously enables pivoting and/or deformation of the rib elements in the radial direction about a third pivot axis. The third pivot axis preferably extends essentially along the vertical axis Z′. The term "essentially" used should be interpreted in such a way that minor tolerance deviations are also claimed. Thus, the deviation can be an angle of preferably less than 10°, more preferably less than 7.5°, even more preferably less than 5°. The third pivot axis preferably runs parallel to the height axis Z′. Pivoting of the rib elements can be made possible by providing a joint element or an elastically deformable element, by means of which the rib elements are attached to the central structure. Cumulatively or alternatively, the rib elements can be made flexible at least in sections, so that twisting or torsion of the rib elements can take place about the third pivot axis. As a result of the pivoting and/or the deformation, it is possible for the rib elements lying against the user to at least partially follow this rotational movement during a rotational movement. The shoulder area thus remains supported by the user's rotational movement, which prevents the user from adopting a bad posture and increases seating comfort. It is advantageous here that the pivoting and/or deformation of the rib elements is independent of a pivoting and/or deformation of the first plate-like element.

According to the invention, a headrest part is arranged on the central structure. The headrest part is preferably arranged above the rib elements along the height axis Z′. The headrest part is preferably arranged on the central structure by means of a first arm element. The first arm element is preferably arranged between the support elements along the height axis Z'.

According to a further preferred embodiment, the headrest part has a second plate-like element. Such a second plate-like element serves to support the head. This second plate-like element can also be designed as a shell element.

According to the invention, the headrest part can be displaced along the vertical axis Z'. According to the invention, a guide device is provided, preferably on the first arm element, in which a second arm element is guided along the vertical axis Z′. A predetermined height position of the second arm element can preferably be fixed by a fixing device. Advantageously, the second plate-like element is arranged on the second arm element, on which an upholstery element can preferably be arranged. The height of the headrest part can therefore be adjusted by shifting the second plate-like element and the second arm element relative to the first arm element or the central structure. It is advantageous if the first arm element is firmly fixed to the central structure. Advantageously, the first arm member is firmly fixed between the support members.

According to a further embodiment, a displacement of the headrest part along the vertical axis Z′ could also be realized by a displacement of the first arm element along the vertical axis Z′ relative to the central structure or the support elements. It is advantageous if each support element has a rail structure on the side pointing towards the arm element, in which the arm element can be guided.

According to a further preferred embodiment, the vehicle seat includes a locking mechanism, by means of which the displacement of the headrest part can be locked relative to the central structure. A desired height of the headrest part can be set by providing a locking mechanism. Such a locking mechanism can, for example, comprise a detachable toothing of a bolt in a toothed element.

According to a further preferred embodiment, the vehicle seat includes a resetting mechanism, by means of which the displacement of the headrest part relative to the central structure can be reset to an initial position. The restoring mechanism can, for example, comprise an elastic element or a spring element.

The displacement of the first arm element can take place cumulatively or as an alternative to the displacement of the second arm element relative to the second arm element.

According to a further preferred embodiment, at least one guide pin is provided on the second arm element. The guide pin is preferably guided in the guide device. Advantageously, the guide device is U-shaped and has a guide groove or a guide rail on the two U-legs extending along the depth direction X′, in or on each of which a guide pin is guided. The fixing device preferably has a predetermined number of projections which are designed to complement a recess or groove provided on the guide pin. Advantageously, in a locking position, a spring device presses a projection into the recess of the guide pin. As a result, the second arm element and thus also the second plate-like element are held at a specific height position. In order to change the height position, the user can apply a corresponding force along the height axis Z', as a result of which the press connection between the recess of the guide pin and the projection, imposed by the spring device, is released. The guide pin can then be relocated to another projection that is below or above the original projection. Again, the respective projection can be accommodated in the recess of the guide pin, with the spring device again providing a corresponding press connection between the recess and the now selected projection. With this configuration, a simple adjustment of the height position of the headrest part is achieved.

According to a further preferred embodiment, the guide device comprises an end receptacle for the at least one guide pin, in which a rotation of the guide pin and the second arm element about a pivot axis S is made possible. According to the invention, the pivot axis S extends along the width axis Y'. Furthermore, it is advantageous that the end mount is located at an upper end of the guide groove or the guide rail. As a result of the pivoting of the second arm element, the second plate-like element can be pivoted forwards along the depth axis X'.

The vehicle seat can thus be brought into a stowed position in which, on the one hand, the backrest element has been displaced essentially parallel to the seat part, or parallel to the depth axis X of the vehicle seat. Furthermore, in this position, the headrest part can be pivoted in such a way that it extends essentially parallel to the depth axis X′. In the reference system of the entire vehicle seat, the headrest would then extend essentially along the height axis Z′. As a result, the vehicle seat can be folded up in a very space-saving manner and, if necessary, stowed away.

According to a further advantageous embodiment, the second plate-like element is arranged on the first or second arm element by means of a joint element. The second plate-like element can preferably be pivoted about a fourth pivot axis, which essentially runs along the vertical axis Z′. The plate-like element is preferably pivotable about a fifth pivot axis, which runs essentially along the width axis Y′. This configuration allows the head to be optimally supported. The pivoting of the headrest part is advantageously independent of the pivoting and/or deformation of the first plate-like element and the pivoting and/or deformation of the rib elements.

According to a further preferred embodiment, the vehicle seat comprises a substructure, by means of which it is arranged on the body of the vehicle. The substructure is preferably connected to the seat part and optionally to the backrest element. The substructure can include a damping and/or springing device for damping and/or springing of vertical vibrations or deflections. Furthermore, the substructure can include a damping and/or springing device for damping and/or springing of horizontal vibrations or deflections.

According to a further preferred embodiment, the backrest element is at least partially made of an aluminum alloy. Sufficient stability and weight reduction can be achieved by using this material.

With regard to the commercial vehicle cab, the object according to the invention is achieved by a commercial vehicle cab according to claim 15 .

The commercial vehicle cab can be equipped with all of the features already described above in connection with the vehicle seat, individually or in combination with one another, and vice versa.

• 1 eine isometrische Ansicht des Fahrzeugsitzes nach einer Ausführungsform;
• 2 eine Rückansicht des Rückenlehnenelementes nach einer Ausführungsform;
• 3 eine Rückansicht des Rückenlehnenelementes nach einer Ausführungsform;
• 4 eine Seitenansicht des Fahrzeugsitzes nach einer Ausführungsform;
• 5 eine Draufsicht von oben des Rückenlehnenelementes nach einer Ausführungsform;
• 6 eine Draufsicht von unten des Rückenlehnenelementes nach einer Ausführungsform;
• 7 eine Rückansicht des Kopfstützenteils nach einer Ausführungsform;
• 7a eine Schnittansicht eines Abschnitts des Kopfstützenteils nach einer Ausführungsform;
• 8 eine Schnittansicht eines Abschnitts des Kopfstützenteils nach einer Ausführungsform;
• 9 eine Seitenansicht eines Abschnitts des Kopfstützenteils nach einer Ausführungsform;
• 10 eine Seitenansicht eines Abschnitts des Kopfstützenteils nach einer Ausführungsform;
• 11 eine Seitenansicht eines Abschnitts des Kopfstützenteils nach einer Ausführungsform;
• 12 eine Explosionsdarstellung des Kopfstützenteils und eines Abschnitts des Rückenlehnenelementes nach einer Ausführungsform;
• 13 eine isometrische Ansicht des Fahrzeugsitzes nach einer Ausführungsform;
• 14 eine Explosionsdarstellung des Fahrzeugsitzes nach einer Ausführungsform;
• 15 eine Feststelleinrichtung zur Einstellung der Neigung des Rückenlehnenelementes nach einer Ausführungsform;
• 16 eine Feststelleinrichtung zur Einstellung der Neigung des Rückenlehnenelementes nach einer Ausführungsform;
• 17 eine Feststelleinrichtung zur Einstellung der Neigung des Rückenlehnenelementes nach einer Ausführungsform;
• 18 eine Seitenansicht des Fahrzeugsitzes nach einer Ausführungsform mit verschiedenen Neigungsposition der Rückenlehne;
• 19 eine Ansicht einer Nutzfahrzeugkabine mit einem Fahrzeugsitz nach einer Ausführungsform;
• 20 eine Ansicht einer Nutzfahrzeugkabine mit einem Fahrzeugsitz nach einer Ausführungsform;
• 21 eine Ansicht eines Fahrzeugsitzes nach einer Ausführungsform;
• 22 eine Ansicht eines Führungssystems für einen Fahrzeugsitz nach einer Ausführungsform;
• 23 eine Ansicht eines Führungssystems für einen Fahrzeugsitz nach einer Ausführungsform;
• 24 eine Ansicht einer Nutzfahrzeugkabine mit einem Fahrzeugsitz nach einer Ausführungsform;
• 25 eine Ansicht einer Nutzfahrzeugkabine mit einem Fahrzeugsitz nach einer Ausführungsform;
• 26 eine Ansicht einer Nutzfahrzeugkabine mit einem Fahrzeugsitz nach einer Ausführungsform;
• 27a,b Ansichten eines Führungssystems für einen Fahrzeugsitz nach einer Ausführungsform;
• 28 eine Ansicht eines Fahrzeugsitzes nach einer Ausführungsform von oben;
• 29 eine Ansicht eines Fahrzeugsitzes nach einer Ausführungsform von unten.

Further advantages, aims and properties of the present invention are explained on the basis of the following description of the appended figures. Similar components can have the same reference numbers in the different embodiments. In the figures show:

• 1 an isometric view of the vehicle seat according to an embodiment;
• 2 a rear view of the backrest element according to an embodiment;
• 3 a rear view of the backrest element according to an embodiment;
• 4 a side view of the vehicle seat according to an embodiment;
• 5 Figure 12 is a top plan view of the backrest member according to one embodiment;
• 6 12 is a bottom plan view of the backrest member according to one embodiment;
• 7 a rear view of the headrest part according to an embodiment;
• 7a a sectional view of a portion of the headrest part according to an embodiment;
• 8th a sectional view of a portion of the headrest part according to an embodiment;
• 9 a side view of a portion of the headrest part according to an embodiment;
• 10 a side view of a portion of the headrest part according to an embodiment;
• 11 a side view of a portion of the headrest part according to an embodiment;
• 12 an exploded view of the headrest part and a portion of the backrest element according to an embodiment;
• 13 an isometric view of the vehicle seat according to an embodiment;
• 14 an exploded view of the vehicle seat according to an embodiment;
• 15 a locking device for adjusting the inclination of the backrest element according to an embodiment;
• 16 a locking device for adjusting the inclination of the backrest element according to an embodiment;
• 17 a locking device for adjusting the inclination of the backrest element according to an embodiment;
• 18 a side view of the vehicle seat according to an embodiment with different inclination positions of the backrest;
• 19 a view of a commercial vehicle cabin with a vehicle seat according to one embodiment;
• 20 a view of a commercial vehicle cabin with a vehicle seat according to one embodiment;
• 21 a view of a vehicle seat according to an embodiment;
• 22 a view of a guidance system for a vehicle seat according to an embodiment;
• 23 a view of a guidance system for a vehicle seat according to an embodiment;
• 24 a view of a commercial vehicle cabin with a vehicle seat according to one embodiment;
• 25 a view of a commercial vehicle cabin with a vehicle seat according to one embodiment;
• 26 a view of a commercial vehicle cabin with a vehicle seat according to one embodiment;
• 27a,b Views of a guidance system for a vehicle seat according to an embodiment;
• 28 a view of a vehicle seat according to an embodiment from above;
• 29 12 is a bottom view of a vehicle seat according to one embodiment.

In the 1 until 29 a vehicle seat 100 or a backrest element 4 is shown. The vehicle seat 100, which extends along a height axis Z and a width axis Y, comprises a seat part 5 and a backrest element 4, which extends along a height axis Z' and a width axis Y', the backrest element 4 extending along a height axis Z'. extending central structure 1, which is arranged centrally along the width axis Y' and ends in a base structure 2 extending essentially along the width axis Y', wherein the backrest element 4 has at least one stability element 8, which extends along the width axis Y' from the central structure 1, the base structure 2 being pivotably arranged in a holding structure 6 of the vehicle seat 100, so that the backrest element 4 can be pivoted about a first pivot axis 3, the first pivot axis 3 being spaced apart from the seat part 5 along the vertical axis Z of the vehicle seat 100.

The vehicle seat 100 thus extends along the height axis Z, the width axis Y and a depth axis X. Two directions can be assigned to the respective axes. Thus, the height axis Z includes the directions Z1 (up) and Z2 (down). The width axis Y includes the directions Y1 (to the right) and Y2 (to the left). The depth axis X includes the directions X1 (forward) and X2 (backward).

The backrest element 4 extends along the height axis Z', the width axis Y' and a depth axis X'. Two directions can also be assigned to these respective axes. Thus, the vertical axis Z' includes the directions Z'1 (upward) and Z'2 (downward). The width axis Y' includes the directions Y'1 (to the right) and Y'2 (to the left). The depth axis X' includes the directions X'1 (forward) and X'2 (backward).

A pivoting of the backrest element 4 according to the invention about the first pivot axis 3 can thus take place forwards and backwards or along the directions X1 and X2 of the vehicle seat 100 . In the figures, these pivoting directions are marked with the arrows 3a and 3b.

Upholstery elements 20, 20a, 20b can be arranged on the backrest element 4. The backrest element 4 and the upholstery elements 20, 20a, 20b thus form the backrest 21. The seat part 5 can also comprise an upholstery element 22. Finally, the headrest part 9 can also comprise a padding element 31 . The configuration with the upholstery elements is, for example, in the 1 , 2 and 7 clearly visible.

The holding structure 6 has two holding legs 6a, 6b extending along the vertical axis Z. These holding legs 6a, 6b are arranged on the seat part 5 on an outer edge 5a, 5b of the seat part 5 along the width axis Y in each case. The holding structure 6 has a cross brace 6c which extends along the width axis Y and which connects the holding legs 6a, 6b along the horizontal width axis Y. This cross brace 6c can be formed in one piece or in one piece with the holding legs 6a, 6b. The holding legs 6a, 6b can also be connected to the cross brace 6c by means of a screw connection, a rivet connection, a welded connection or some other type of connection. The holding structure 6 is thus U-shaped.

The seat part 5 has a receiving element 23 for the upholstery element 22 or the seat surface. This receiving element 23 can be manufactured in such a way that it has a corresponding stability which is sufficient for a corresponding input of force through the holding legs 6a, 6b. The cross brace 6c could thus be a section of the receiving element 23 which extends along the width direction Y. Alternatively, the cross brace 6c could be a single component which is arranged in or on the receiving element 23 . This cross brace 6c could also be additionally connected to a seat substructure 32 of the vehicle seat 100 in order to transmit a corresponding force input to it.

The backrest element 4 comprises a lower part 4a, which is arranged along the height axis Z' below the first pivot axis 3, and an upper part 4b, which is arranged above the first pivot axis 3 along the height axis Z'. When pivoting in accordance with the pivoting direction 3a, the upper part 4b is pivoted backwards. At the same time, the lower part 4a is pivoted forward. This can bring about lordosis/kyphosis support.

The base structure 2 is dimensionally stable and extends along the width axis Y′. How out 6 As can be seen, the base structure 2 can have an arc-like structure which extends backwards, ie in the depth direction X'2. The base structure 2 has a middle section 25 . This central portion 25 is parallel to the first pivot axis 3 and spaced from the first pivot axis 3 along the depth direction X'2. The middle section 25 of the base structure 2 can be reinforced in order to ensure sufficient stability for a corresponding introduction of force. From the middle section 25, a lateral section 26a, 26b extends linearly toward the pivot axis 3. These lateral sections 26a and 26b open out at the respective outer edges 2a, 2b of the base structure 2 into a preferably circular receiving section 27a, 27b. A bearing shaft element 17a, 17b is arranged on each of the receiving sections 27a, 27b. The pivot axis 3 runs centrally through the bearing shaft elements 17a, 17b.

The bearing shaft elements 17a, 17b are rotatably mounted in a pivot bearing 7a, 7b of the holding legs 6a, 6b. It would be advantageous if the bearing shaft elements 17a, 17b extend through the holding legs 6a, 6b along the width axis Y and end in a securing element 28a, 28b. Such a securing element 28a, 28b could be integrated, for example, in an armrest 29a, 29b, such as in 3 implied. In such an embodiment, the bearing shaft elements 17a, 17b could also serve as pivot bearings for the armrests 29a, 29b.

The vehicle seat 100 can also include a locking mechanism, by means of which the pivoting of the backrest element 4 about the first pivot axis 3 can be locked.

Furthermore, the vehicle seat 100 can include a reset mechanism, by means of which a pivoting of the backrest element 4 about the first pivot axis 3 can be reset to a starting position.

The backrest element 4 comprises a stability element 8 in the form of a first plate-like element 12. The first plate-like element 12 extends along the width direction Y' and the height direction Z'. It may have a cup shape in which the user's lower back can be accommodated. To this end, the outer edges of the first plate-like element 12 would extend forwards in the depth direction X'1.

The first plate-like element 12 is arranged in a lower area 1c of the central structure 1 along the height axis Z′. The first plate-like element 12 extends along the height axis Z' of the backrest element 4 beyond the pivot axis 3 in the direction of the seat part 5. The lower part 4a of the backrest element 4 thus corresponds to a lower section 12a of the first plate-like element 12, which projects beyond the pivot axis 3. When pivoting along the pivoting direction 3a, an upper section 12b of the first plate-like element 12 would therefore pivot backwards and the lower section 12a would pivot forwards. As already mentioned, this brings about lordosis/kyphosis support.

The first plate-like element 12 can be arranged pivotably on the central structure and/or be flexible at least in sections. A pivoting and/or a deformation of the first plate-like element 12 in the radial direction along the direction of the arrow 11 about a second pivot axis 10a can thus be made possible. The second pivot axis 10a extends essentially along the height axis Z′. A turning movement of the user can thus be followed to a certain extent by a pivoting or twisting of the first plate-like element 12 . Since the lower back is thus further supported, increased seating comfort is made possible.

On the first plate-like element 12, a cushion element 20a is further arranged. The first plate-like element 12 or the upholstery element 20a can preferably be designed such that the lower section 12a or the lower section of the upholstery element 20a arranged thereon contacts the seat part 5 or the upholstery element 22 . However, it could also be provided that a small free space is provided between the cushion element 22 and the lower section 12a or the lower section of the cushion element 20a arranged thereon. Such a distance is preferably in a range between 0 cm and 7.5 cm, more preferably in a range between 0 cm and 5 cm, more preferably in a range between 0 cm and 2.5 cm.

The central structure 1 has at least one support element extending along the vertical axis Z′ ment 1a, 1b, which is connected to the base structure 2 on the underside. The 1 until 3 It can be seen that the central structure 1 has two support elements 1a, 1b which extend along the height axis Z′ and which are connected to the base structure 2 on the underside. The support elements 1a, 1b are spaced apart along the width axis Y'. Furthermore, the support elements 1a, 1b open into the middle section 25 of the base structure 2. The width of the middle section 25 is predetermined by the spaced-apart support elements 1a, 1b.

The backrest element 4 has two stability elements 8, which are designed in the form of rib elements 18a, 18b. The rib elements 18a, 18b are arranged along the height axis Z' above the first plate-like element 12 and each have an extension along the width axis Y'. A first rib element 18a extends along the width direction Y'2 and is thus opposite to the second rib element 18b which extends along the width direction Y'1. The rib elements 18a, 18b are P-shaped and also extend slightly forward, ie in direction X'1. These rib elements 18a, 18b serve to support the shoulder area of the user. Furthermore, the rib elements 18a, 18b can be arranged on the central structure 1, which is formed integrally with them. Accordingly, a rib element 18a, 18b is arranged on a support element 1a, 1b or a rib element 18a, 18b is formed integrally with a support element 1a, 1b. Conceivable connections between the rib elements 18a, 18b and the support elements 1a, 1b are screw connections, welded connections, rivet connections, etc. Likewise, as mentioned, a rib element 18a, 18b can be integrally formed with a support element 1a, 1b Casting methods or similar methods are produced.

A cushion element 20b is also arranged on the rib elements 18a, 18b.

In addition, a headrest part 9 is arranged on the central structure 1 . The headrest part 9 is arranged along the height axis Z′ above the rib elements 18a, 18b by means of a first arm element 13. The first arm element 13 is arranged between the support elements 1a, 1b along the vertical axis Z'. This can be a fixed arrangement. Alternatively, this arrangement can be provided in such a way that the headrest part 9 can be displaced along the arrow 15, ie along the vertical axis Z'. For this purpose, the headrest part 9 is arranged on the central structure 1 by means of a first arm element 13 or an arm. The arm element 13 is arranged between the support elements 1a, 1b so as to be displaceable along the vertical axis Z'. For this purpose, a rail device could be provided on the side surfaces 30a, 30b of the support elements 1a, 1b pointing towards the first arm element 13, by means of which the first arm element 13 can be guided. It would also be conceivable for a locking mechanism to be provided, by means of which a certain height of the headrest can be fixed. It would also be conceivable for a reset mechanism to be provided, by means of which a reset to an initial height is undertaken.

According to a further embodiment, a guide device 39 is provided on the first arm element 13, in which a second arm element 40 is guided along the height axis Z′. A predetermined height position of the second arm element 40 can be fixed by a fixing device 41 . The displacement of the first arm element 13 can take place cumulatively or as an alternative to the displacement of the second arm element 40 relative to the first arm element 13 . It would also be possible for the first arm element 13 to be firmly fixed to the central structure 1 .

Two guide pins 42 are preferably provided on the second arm element 40 . The guide device 39 is U-shaped and has a guide groove 47 or a guide rail on the two U-legs 39a, 39b extending along the depth direction X', in or on each of which a guide pin 42 is guided. This embodiment is in the 7 until 12 shown. The U-shaped guide device 39 is arranged on an upper portion 13c of the first arm element 13 . This upper section 13c of the first arm element 13 is arranged offset to the rear along the depth axis X′ (depth direction X′2) with respect to a lower section 13a of the first arm element 13 . With this offset, the second arm member 40 occupies substantially the same position along the depth axis X' as the lower portion 13a of the first arm member 13 . The lower portion 13a of the first arm member 13 is connected to the upper portion 13c via a transition portion 13b. This transition section 13b and the lower section 13a enclose an angle α. This can be clearly seen in 10 . The angle α is preferably in a range between 10° and 80°, more preferably between 25° and 65°, more preferably between 35° and 55°, more preferably between 40° and 50°, more preferably at 45°.

Furthermore, the locking device 41 has a predetermined number of projections 43 . The projections 43 are arranged in the guide groove 47 inwards. Furthermore, the projections 43 are designed to complement a recess 44 of the guide pins 42 . The locking device 41 also includes a spring device 45, which has a rail 45a, which is pressed in the direction of the projections 43 by means of at least one, preferably several, spring element(s) 45b. The rail 45a extends essentially over the entire length of the guide groove 47. The rail 45a is also arranged on the U-leg via two pins 48, which are each guided in a guide 49. The maximum displacement path of the rail 45a in the direction of the projections 43 is predetermined by the length of the guide.

In the 7 , 7a and 8th the guide pin 42 is in the lowest position of the guide groove 47. This corresponds to the lowest position of the headrest part 9. The guide pin 42 is in a locking position in which the spring device 45 presses a projection 43 into the recess 44 of the guide pin 42. As a result, the second arm element 40 and thus also the second plate-like element 19 are held at this specific height position.

In order to change the height position, the user can apply a corresponding force along the height axis Z′, as a result of which the press connection between the recess 44 of the guide pin 42 and the projection 43 imposed by the spring device 45 is released. The guide pin 42 can then be moved to a further projection 43 which is below or above the original projection 43. Again, the respective projection 43 can be accommodated in the recess 44 of the guide pin 42, with the spring device 45 in turn providing a corresponding press connection between the recess 44 and the projection 43 now selected. With this configuration, a simple adjustment of the height position of the headrest part 9 is achieved. In the 7 , 7a for example, a lowermost position of the headrest part 9 can be seen. In the 9 , 10 and 11 an uppermost position of the headrest part 9 can be seen.

The guide device 39 has an end receptacle 46 for the one guide pin 42, in which a rotation of the guide pin 42 and the second arm element 40 about a pivot axis S is made possible. The end socket 46 is arranged along the height axis Z′ at the upper end of the guide groove 47 and has a substantially circular shape. In the 9 and 10 it can be seen that the guide pin 42 is located in the end receptacle 46 of the guide groove 47 . At the same time, the headrest part 9 is pulled out as far as possible. Accordingly, the pivot axis S extends along the width axis Y'. Thus, the second arm member 40 and the second plate-like member 19 are allowed to pivot forward (in the X'1 direction) along the depth axis X'. This is good in 10 recognizable. On the guide device 39 there is also a locking device 50 which comprises a sheet-like element 51 . Prestressing, generated for example by means of a spring element, presses this sheet-like element 51 into the recess 44 of the guide pin 42, as a result of which the latter is locked in the pivoted forward position. When a user exerts force, the sheet-like element 51 can be displaced against the spring force and the guide pin 42 can be displaced back into the guide groove 47 .

The vehicle seat 100 can thus be brought into a stowed position in which, on the one hand, the backrest element 4 has been displaced essentially parallel to the seat part 5 or parallel to the depth axis X of the vehicle seat 100 . This is for example in the 13 , 19 , 20 , 25 and 26 recognizable. Furthermore, in this position, the headrest part 9 can be pivoted in such a way that it extends essentially parallel to the depth axis X′. In the reference system of the entire vehicle seat 100, the headrest part 9 would then extend essentially along the vertical axis Z′. As a result, the vehicle seat 100 can be folded up in a very space-saving manner and, if necessary, stowed away. This is for example in the 13 , 19 , 20 , 25 and 26 shown. The vehicle seat 100 can then be shifted under a shelf or a bed 64 (along arrow 53) and stowed there, for example by means of a guide system 52. The advantageously folded vehicle seat 100 takes up very little storage space there.

The headrest part 9 has the second plate-like element 19 on which the cushion element 31 is arranged. The second plate-like member 19 is arranged on the first arm member 13 or the second arm member 40 by means of a hinge member 14 . This joint element 14 allows the headrest part 9 to pivot about a fourth pivot axis 10c, which runs essentially along the height axis Z', and pivoting about a fifth pivot axis 10d, which runs essentially along the width axis Y'. Pivoting about the fourth pivot axis 10c is represented by the double arrow 16b and pivoting about the fifth pivot axis 10d is represented by the double arrow 16a.

The joint element 14 connects the first arm element 13 or the second arm element 40 with a rib structure 9a which is V-shaped is designed and on which the second plate-like element 19 is arranged.

In the 14 until 18 Embodiments are shown in which a locking device 54 can be used to adjust the inclination of the backrest element 4 relative to the seat part 5 . This locking mechanism 54 can be integrated into the holding structure 6 or the holding legs 6a, 6b. The locking device 54 comprises a base element 55 which is arranged or fastened to the holding structure 6 or the holding legs 6a, 6b. An actuating element 56 is rotatably fastened to this base element 55 . Furthermore, a toothed element 57 is rotatably arranged on the base element 55 . This toothed element 57 is firmly connected to the central structure 1 . In particular, the toothed element 57 is connected to the base structure 2 . The toothed element 57 is mechanically firmly connected to a receiving section 27a, 27b. This can be done, for example, by welding.

At a lower end, the toothed element 57 has a toothed section 57a in the form of a segment of a circle. Furthermore, a locking element 58 is arranged on the base element 55 . This locking element 58 also has a toothed section 58a which can engage in the toothed section 57a of the toothed element 57 . In a locking position, the toothed section 58a engages with the toothed section 57a, as a result of which the toothed element 57 is fixed. A rotation of the toothed element 57 about an axis of rotation 60 is thus prevented, as a result of which the inclination of the backrest element 4 relative to the seat part 5 is also fixed.

Actuation of the actuating element 56 in the direction of the arrow 61 ( 15 ) causes the actuating element 56 to rotate about the axis 59. A rear section 56a of the actuating element 56 is accordingly moved counter to the direction of the arrow 61. As a result, a projection 62 is pressed against the locking element 58, so that an upper section 58b of the locking element 58 outwards, or along the direction of the arrow 63 ( 16 ) is bent. In 16 the locking element 58 is indicated in this deformed state with dashed lines. Due to this deformation of the locking element 58, the toothed section 58a no longer engages in the toothed section 57a of the toothed element 57. The toothed element 57 can then be rotated with the backrest element 4, as a result of which the inclination of the backrest element 4 relative to the seat part 5 can be adjusted. After the desired inclination has been set, the actuating element 56 is displaced in the opposite direction to the arrow 61 . This can also be done automatically by applying a spring force. The locking element 58 can reversibly return to its original position, as a result of which the toothed section 58a again engages in the toothed section 57a of the toothed element 57, optionally at a different area of the toothed section 57a.

If the vehicle seat 100 is to be placed in a stowable state, after unlocking the backrest can be pivoted forward in direction X1 until the backrest element 4 is arranged essentially parallel to the seat part 5 . This is for example in the 19 until 21 and 24 until 26 shown.

Due to the stability elements 8, which can be swiveled or deformed independently of one another, in the form of the first plate-like element 12 and the rib elements 18a, 18b and the headrest part 9, which can be swiveled independently of them, swiveling and deformation can take place during a rotary movement in three planes, thereby optimally supporting the user can be done. As a result, incorrect posture can be avoided and a high level of seating comfort can be guaranteed.

In addition, the pivoting about the first pivot axis 3 provides lordosis/kyphosis support. The first distance 37 between the first pivot axis 3 can accordingly be selected in such a way that such a lordosis/kyphosis support can be generated. The first distance 37 between the first pivot axis 3 and the seat part 5 is advantageously in a range between 2 cm and 30 cm, more preferably the first distance 37 is in a range between 5 cm and 25 cm. Even more preferably, the first distance 37 is in a range between 5 cm and 15 cm.

It would also be conceivable if the pivot bearing 7a, 7b of the holding legs 6a, 6b were adjustable along the vertical axis Z. In this way, the first distance 37 between the first pivot axis 3 and the seat part 5 would be adjustable, as a result of which the lordosis/kyphosis support could thus be adapted to the user. This could be done, for example, with a latching device, with the bearing shaft elements 17a, 17b being held in latching devices which are arranged at different heights.

Since the upholstery element 20a, which is arranged on the first plate-like element 12, occupies a certain second distance 38 from the first pivot axis 3 through the backrest 21, in conventional seats the backrest cannot be pivoted so far forward that the backrest and the seat portion are substantially parallel. Due to the first distance 37 according to the invention between Pivoting axis 3 and the seat part 5 or the seat part surface that comes into contact with the user, the backrest 21 or the backrest element 4 can be swiveled forward so far that the central structure 1 or the backrest element 4 are essentially parallel. As a result, the vehicle seat 100 can take up a much smaller storage space. The first distance 37 would therefore have to correspond at least to the second distance 38 .

In 4 the seat substructure 32 is shown, which connects the seat part 5 to the vehicle body 33 . This seat substructure 32 comprises a scissor frame 34 with a suspension device 35, for example an air spring and a damping device 36. Horizontal suspension can also be provided. The seat base 32 may also include a cover assembly 24 covering the noted components

In the 19 until 27 the vehicle seat 100 is designed as an advantageous passenger seat, which can be installed in a commercial vehicle cab 65 (see also 13 ) is arranged. Such a commercial vehicle cab 65 can be provided in a truck, for example. In the 19 and 24 An unfolded state of the vehicle seat 100 is shown in each case, in which the vehicle seat 100 is arranged in a front region of the utility vehicle. In the 20 , 21 , 25 and 26 the vehicle seat 100 is in a folded state. The backrest element 4 is essentially parallel to the seat part 5. This is made possible by the inventive spacing of the first pivot axis 3 along the vertical axis Z of the vehicle seat 100 from the seat part 5.

Due to the advantageous embodiment of the headrest part 9 already described, in which the second arm element 40 can be displaced in the guide device 39, the headrest part 9 can advantageously be folded down along the vertical direction Z2. After the vehicle seat 100 has been folded up, the headrest part 9 would protrude beyond the seat part 5 and would be considered a nuisance due to the limited interior space. Due to the advantageous folding over of the headrest part 9, the length of the seat is reduced considerably in the folded state.

In many commercial vehicle cabs 65 , a bed or shelf 64 is provided behind the vehicle seats 100 . The advantageous collapsible vehicle seat 100 can according to the embodiments according to the 13 and 19 until 27 stowed under the bed or shelf 64. A guide system 52 or a rail system is provided for this purpose. The vehicle seat 100 is connected to the body floor or the floor of the commercial vehicle cab 65 by means of this guide system 52 . At least one, preferably two, lower rail element(s) 66 is/are provided, which is/are let into the body floor or cabin floor or is/are attached to it. At least one, preferably two, upper rail element(s) 67 is/are provided on this lower rail element 66, which is/are connected to the vehicle seat 100. The two lower rail elements 66 advantageously run parallel.

A locking device 68 is also provided on the upper rail elements 67, by means of which the vehicle seat 100 can be locked in a corresponding position. A Bowden cable 69 can be provided to operate the locking device 68 . This is in the 19 until 23 shown. Alternatively, a lever element 70 can be provided ( 24 until 27 ). In the 19 and 24 1 shows a maximum forward position of the upper track members 67 in which the vehicle seat 100 would be in a corresponding maximum forward position. In the 21 and 26 1 shows a maximum rearward position of the upper track members 67 in which the vehicle seat 100 would be in a corresponding maximum rearward position. In this case, this would be folded under the bed or under the shelf 64 .

The vehicle seat 100 can only be displaced while the locking device 68 is being actuated. Once the actuator is released, the locking device 68 engages and locks the vehicle seat 100 in place. The shift can be done by muscle power of the user. However, an actuator could also be provided, which moves the vehicle seat 100 to the desired position. Such an actuator can be driven electrically or hydraulically, for example.

In the 23 and 27a (Front side), 27b (back side) the locking device 68 is shown. This includes a lever element 71 which can be rotated about an axis of rotation. The lever member 71 is fixed to the upper rail member 67 by a fastener 72 . Latch elements are provided on the lever element 71 and engage in a rack provided on the lower rail element 66 . The engagement results in a firm latching between the upper rail element 67 and the lower rail element 66. A restoring element 73 in the form of a spring element is also provided, by means of which the rotation of the lever element 71 can be reset. After the locking device 68 has been actuated, this restoring element 73 returns the locking device to the latched state.

In 29 the underside of the vehicle seat 100 is shown. The upper rail elements 67 (not labeled in this figure) of the guide system 52 can be seen here.

Folding in the vehicle seat 100 makes it possible for a larger area to become free in the front area of the commercial vehicle cab 65 either on the passenger side or on the driver's side or in both areas, in order to arrange a table or other desired additional construction modules or components here, for example, which can then be used elsewhere Allow temporary use of the commercial vehicle cabin 65. Another sleeping area can then also be arranged in this area, for example.

The vehicle seat 100 according to the invention with the novel backrest structure 4 is characterized in that struts/strut elements or lateral stability elements 4, which can certainly also be arranged pivotably, are attached to the left and right of a central, force-absorbing longitudinal structure (support structure 1 ) stretch away. This centrally arranged rear longitudinal structure is supported on the underside on the first pivot axis 3, which is preferably aligned horizontally or based on the horizontal, and is firmly connected thereto. In this way, this rear central structure (longitudinal structure) 1 and the first pivot axis 3 are suitable for pivoting the backrest 21 forwards and backwards, it being crucial that this first pivot axis 3 is elevated relative to the seat part 5 in a U- shaped profile (support structure 6), which extends upwards from the seat part 5 in its rear, is arranged. As a result, when said first pivot axis 3 is fixed on the left and right in upstanding U-legs (holding limbs 6a, 6b), a pivoting movement is carried out, for example in the area of the lumbar vertebrae or even above or below it can be. This resulting tilting movement of the backrest 21 allows the backrest part located below the first pivot axis 3 to pivot forward when pivoted, thereby providing lordosis/kyphosis support.

In 1 the vehicle seat 100 is shown in a perspective rear view. It can be seen from this illustration that the back structure of the vehicle seat 100 is completely new. This back structure consists of a central longitudinal support structure and, from top to bottom, individual components (stability elements 8) or a single component (stability element 8).

The structural elements, which extend from top to bottom and are designed here as support elements 1a, 1b, which preferably run vertically, are force-absorbing support elements 1a, 1b, which are connected to the first pivot axis 3 on the underside. In this way, when pivoting about the first pivot axis 3 according to the arrows 3a, 3b, the entire back structure extending above the pivot axis 3 is pivoted forwards or backwards. This applies in the opposite direction for the lower part 4a, which extends towards the seat part 5. The upper part 4b and the headrest part 9 of this backrest 21 can therefore be pivoted in the opposite direction to the lower part 4a with respect to the pivot point.

This pivoting movement is achieved in that the first pivot axis 3 is arranged elevated, i.e. higher than the seat part 5. This is achieved by arranging a U-shaped receiving frame in the rear area of the seat part 5 in order to use the U-legs 6b to arrange to achieve the first pivot axis 3 in a higher state.

The backrest structure also has lateral rib elements 18a and 18b and the headrest part 9, which could also be pivoted about a vertically running pivot axis/force axis 10a, 10b, 10c along the direction of the arrow 11, but does not have to be. This goes out 2 , which shows the backrest 21 in perspective. A high degree of flexibility of the backrest 21 is achieved as a result.

This flexibility is also achieved in that the first plate-like element 12 is not inflexible. Rather, this plate-like element 12 has the function that it is arranged flexibly in relation to the first pivot axis 3 and possibly the longitudinal support structure for supporting the back and can also twist in the lateral direction backwards and forwards. This makes the separate part according to the sections in the upper shoulder area movable or just not movable independently of the underlying area according to the first plate-like element 12 .

At the central up along the force axis 10 a, 10 b, 10 c extending 13, the headrest part 9 is arranged, which of course also forwards or backwards in a 14 joint element not shown here for Tilting a head forwards or backwards can be pivoted. Likewise, this headrest part 9 can also be arranged so that it can be pivoted laterally to the left and right about a vertical axis.

In the 2 , 3 and 4 this is shown in more detail. It can also be clearly seen here that the first pivot axis 3 can be pivoted about the pivot directions 3a, 3b, so that the entire backrest structure, including the innovatively designed lateral rib elements 18a, 18b, which extend obliquely upwards and also slightly forward, pivot leaves. These rib elements 18a, 18b are also formed in a similar form in the headrest part 9 as a rib structure 9a.

Also in 4 the headrest part 9 is shown, which on the one hand could be moved up and down along the arrow 15, on the other hand could also be pivoted forwards and backwards, as shown by the double arrow 16a.

Likewise, the headrest part 9 can pivot to the left and right according to the double arrow 16b, if this is desired. This will in 5 shown, which reproduces a partial top view of the vehicle seat 100 .

In a representation according to 2 and 3 the first pivot axis 3 is shown with its pivot mount opposite the U-shaped mounting part, which is not shown here and extends from bottom to top. A swivel or rotary bearing is arranged in this area. Both the first pivot axis 3 and the rest of the back structure according to the invention preferably have an aluminum alloy for reasons of stability and weight.

In 1 the vehicle seat 100 is shown with the back structure according to the invention and the innovative U-shaped mounting by means of two upwardly extending U-shaped arms.

The vehicle seat 100 was developed as a passenger vehicle seat, which can also be designed as a driver's seat, which can be stowed away to save space in the rear area of the commercial vehicle cab 65 when folded down, in order to reduce the need for more space in the front area of the commercial vehicle cab 65, for example for setting up a table to make a meal available.

Such a passenger or driver's seat can be changed in such a way that the entire backrest area can be folded down onto the seat part 5, so that a rear side of the backrest area is arranged almost horizontally. This vehicle seat 100 can then be moved backwards in the folded state by being pushed backwards on rails embedded in the body floor or on rails attached.

For this purpose, the vehicle seat 100 has rail elements 66, 67 or roller elements or sliding blocks or the like of complementary design on its underside in order to enable the vehicle seat 100 to be displaced in the forward and backward direction.

Of course, such a vehicle seat 100 can be locked in the unfolded state, ie when it is arranged in the front area of the commercial vehicle cab 65 in its regular driving state, by means of additional elements, not shown here, in order to ensure driving safety for the person.

Likewise, this vehicle seat 100 can also be locked in the folded state when it is arranged backwards in the rear area of the commercial vehicle cab 65 below a sleeping bed or the like. This can be made possible, for example, by means of levers and correspondingly designed latching elements.

The first pivot axis 3, about which the backrest element 4 is folded forward onto the seat part 5, is arranged in a raised position. This means that the first pivot axis 3 is held in the present case with bearing legs extending upwards on the left and right, so that the first pivot axis 3 is at a distance from the seat part 5 in the height direction Z.

This is the only way to find upholstered elements 20 of the backrest element 4 and upholstered elements 22 of the seat part 5 when the backrest element 4 is folded down. This makes it possible for the backrest element 4 to actually be in the horizontal direction and for the cushion elements 20, 22 not to oppose one another when the backrest element 4 is folded down or when the backrest element 4 is pivoted down.

The first pivot axis 3 is arranged to run in the horizontal direction behind the backrest element 4 and at the same time holds the entire backrest element 4 . The backrest element 4 is arranged separately from the seat part 5 . This is also clearly reflected in the figures, which also show a central structure which is characterized in that it differs from the first th pivot axis 3 in the lower area extending upwards and thus enables a handy and space-saving backrest structure through a centrally arranged central structure with laterally extending structural elements. The shoulder area and the underlying backrest area are formed separately with shell elements.

The backrest element 4 is preferably made of aluminum or an aluminum alloy in order to obtain a correspondingly low weight. The already mentioned upwardly extending laterally arranged holding legs 6a, 6b have bearing elements on their upper side, for example in the form of ball bearings, in order to be able to store the first pivot axis 3, or the base structure 2, therein at the ends. Likewise, the holding legs 6a, 6b, which extend upwards, are optionally provided with armrests 29a, 29b. These can also be pivoted. The upwardly extending leg elements can also be connected in a U-shape as a one-piece element together with parts of the seat part 5 or a seat plate.

In 28 the vehicle seat 100 is shown from above. The backrest can be clearly seen, which has the structural elements in the rear area of the backrest. Also shown is the first pivot axis 3 journalled in the upwardly extending leg members. The seat part 5 can also be seen.

All features disclosed in the application documents are claimed to be essential to the invention, provided they are new compared to the prior art, either individually or in combination.

Reference List

100

vehicle seat

1

central structure

1a, 1b

support elements

1c

lower part of the central structure

2

base structure

2a, 2b

outer edge of the base structure

3

first pivot axis

3a, 3b

pan direction

4

backrest element

4a

lower part of the backrest element

4b

upper part of the backrest element

5

seat part

5a, 5b

outer edge of the seat

6

holding structure

6a, 6b

holding leg

6c

Cross bracing of the support structure

7a, 7b

swivel bearing

8th

stability element

9

headrest part

9a

rib structure

10a

second pivot axis with respect to the pivoting of the first plate-like element

10b

third pivot axis related to the pivoting of the rib elements

10c

fourth pivot axis related to the pivoting of the second plate-like element

10d

fifth pivot axis related to the pivoting of the second plate-like element

11

arrow direction

12

first plate-like element

12a

lower portion of the first plate-like element

12b

upper portion of the first plate-like element

13

first arm element

13a

lower portion of the first arm member

13b

transition section

13c

upper portion of the first arm member

14

joint element

15

arrow

16a, 16b

double arrow

17a, 17b

bearing shaft element

18a, 18b

rib elements

19

second plate-like element of the headrest part

20

upholstery element

20a

upholstery element

20b

upholstery element

21

backrest

22

Upholstery element of the seat part

23

Receiving element of the seat part

24

Cover device of the seat base

25

middle section of the base structure

26a, 26b

lateral sections of the base structure

27a, 27b

receiving sections of the base structure

28a, 28b

fuse element

29a, 29b

armrest

30a, 30b

side surfaces of the support elements

31

upholstery element

32

seat base

33

vehicle body

34

scissor frame

35

suspension device

36

damper device

37

first distance

38

second distance

39

guide device

39a, 39b

U leg

40

second arm element

41

locking device

42

guide pin

43

protrusions

44

recess

45

spring device

45a

rail

45b

spring elements

46

final shot

47

guide groove

48

pencils

49

guide

50

locking device

51

leafy element

52

guidance system

53

arrow

54

locking mechanism

55

basic element

56

actuator

56a

rear section of the actuator

57

tooth element

57a

Tooth section of the tooth element

58

locking element

59

axis of rotation

60

axis of rotation

61

arrow

62

head Start

63

arrow

64

shelf or bed

65

commercial vehicle cabin

66

lower rail element

67

upper rail element

68

locking device

69

bowden cable

70

lever element

71

lever element

72

fastener

73

return element

X

depth axis

Y

latitude axis

Z

elevation axis

X'

depth axis

Y'

latitude axis

Z'

elevation axis

S

pivot axis

a

angle

Claims (15)

Vehicle seat (100) extending along a height axis (Z) and a width axis (Y), comprising a seat part (5) and a backrest element (4) which extends along a height axis (Z') and in a width axis (Y') wherein the backrest element (4) has a central structure (1) extending along the height axis (Z'), which is arranged centrally along the width axis (Y') and in a base structure extending essentially along the width axis (Y'). (2), the backrest element (4) having at least one stability element (8) which extends away from the central structure (1) along the width axis (Y'), the base structure (2) being in a holding structure (6) of the vehicle seat (100) is arranged pivotably, so that the backrest element (4) is pivotable about a first pivot axis (3), characterized in that the first pivot axis (3) along the vertical axis (Z) of the vehicle seat (100) by a first distance (37) from the seat part (5), wherein a headrest part (9) is arranged on the central structure (1) and along the vertical axis ( Z'), a guide device (39) being provided, in which a second arm element (40) of the headrest part (9) is guided along the height axis (Z'), the second arm element (40) being displaced by a distance along the Width axis (Y') extending pivot axis (S) is pivotable, by pivoting the second arm element (40) the headrest part (9) to a depth axis (X') of the backrest element (4) can be pivoted forward. Vehicle seat (100) according to claim 1 , characterized in that the holding structure (6) has two holding limbs (6a, 6b) extending along the height axis (Z), the holding limbs (6a, 6b) on the seat part (5) at one end along the width axis (Y). edge (5a, 5b) of the seat part (5), the holding structure (6) being U-shaped, the holding structure (6) having a cross brace (6c) which extends along the width axis (Y) and which supports the holding legs (6a, 6b) connects. Vehicle seat (100) according to claim 2 , characterized in that the backrest element (4) has a lower part (4a) which is arranged along the height axis (Z') below the first pivot axis (3) and an upper part (4b) which is arranged along the height axis (Z') is arranged over the first pivot axis (3), includes. Vehicle seat (100) according to claim 2 or 3 , characterized in that the base structure (2) is dimensionally stable, wherein the base structure (2) along the width axis (Y ') outer edges (2a, 2b) has a bearing shaft element (17a, 17b) which in a pivot bearing ( 7a, 7b) of the holding leg (6a, 6b). Vehicle seat (100) according to one of the preceding claims, characterized in that the vehicle seat (100) comprises a locking mechanism by means of which the pivoting of the backrest element (4) about the first pivot axis (3) can be locked. Vehicle seat (100) according to one of the preceding claims, characterized in that the vehicle seat (100) comprises a resetting mechanism, by means of which a pivoting of the backrest element (4) about the first pivot axis (3) can be reset to a starting position. Vehicle seat (100) according to one of claims 3 until 6 , characterized in that the backrest element (4) comprises a stability element (8) in the form of a first plate-like element (12), the first plate-like element (12) along the vertical axis (Z') in a lower region (1c) of the central structure (1), the first plate-like element (12) extending along the height axis (Z') of the backrest element (4) beyond the pivot axis (3) in the direction of the seat part (5), the lower part (4a) of the backrest element (4) is the lower section (12a) of the first plate-like element (12) which projects beyond the pivot axis (3). Vehicle seat (100) according to claim 7 , characterized in that the first plate-like element (12) is arranged pivotably on the central structure (1) and/or is flexible at least in sections, with pivoting and/or deformation of the first plate-like element (12) in the radial direction by one second pivoting axis (10a) is made possible, wherein the second pivoting axis (10a) extends essentially along the vertical axis (Z'). Vehicle seat (100) according to one of the preceding claims, characterized in that the central structure (1) has at least one support element (1a, 1b) which extends along the height axis (Z') and which is connected to the base structure (2) on the underside, wherein the central structure (1) has two support elements (1a, 1b) which extend along the height axis (Z') and are connected to the base structure (2) on the underside, the support elements (1a, 1b) being spaced along the width axis (Y'). are. Vehicle seat (100) according to claim 9 , characterized in that the backrest element (4) has two stability elements (8) which are designed in the form of rib elements (18a, 18b), the rib elements (18a, 18b) along the height axis (Z') above the first plate-like element (12), the rib elements (18a, 18b) each having an extension along the width axis (Y'), a first rib element (18a) extending in the opposite direction to the second rib element (18b), the rib elements ( 18a, 18b) are arranged on the central structure (1) or are formed integrally with it, one rib element (18a, 18b) each being arranged on a support element (1a, 1b) or one rib element (18a, 18b) each with a support element (1a, 1b) is integrally formed. Vehicle seat (100) according to claim 10 , characterized in that the headrest part (9) is arranged along the vertical axis (Z') above the rib elements (18a, 18b), the headrest part (9) being displaceable along the vertical axis (Z'), the headrest part (9) is arranged on the central structure (1) by means of a first arm element (13), the first arm element (13) being arranged displaceably between the support elements (1a, 1b) along the vertical axis (Z'). Vehicle seat (100) according to claim 11 , characterized in that the guide device (39) is provided on the first arm element (13), in which the second arm element (40) is guided along the height axis (Z'), a predetermined height position of the second arm element (40) being defined by a Locking device (41) can be fixed, a second plate-like element (19) being arranged on the second arm element (40). Vehicle seat (100) according to claim 12 , characterized in that at least one guide pin (42) is provided on the second arm element (40), the guide pin (42) being guided in the guide device (39), the fixing device (41) having a predetermined number of projections (43) which are designed to complement a recess (44) provided on the guide pin (42), with a spring device (45) pressing a projection (43) into the recess (44) of the guide pin (42) in a locking position, the guide device (39) an end socket (46) for the at least one guide pin (42) in which the guide pin (42) and the second arm element (40) are allowed to rotate about the pivot axis (S),. Vehicle seat (100) according to claim 11 , characterized in that the headrest part (9) has a second plate-like element (19), the second plate-like element (19) being arranged on the first arm element (13) or the second arm element (40) by means of a joint element (14), wherein the second plate-like element (19) can be pivoted about a fourth pivot axis (10c) which runs essentially along the height axis (Z'), the second plate-like element (19) about a fifth pivot axis (10d) which runs essentially along the width axis (Y') is pivotable. Commercial vehicle cabin (65) with a vehicle seat (100) according to one of the preceding Claims 1 until 14 , The vehicle seat (100) being displaceably arranged in the commercial vehicle cab (65) by means of a guide system (52).

Images