DE102013225123B4 - Vehicle seat with a height adjustment and swivel device - Google Patents

Abstract

Vehicle seat (1) with a height adjustment and swivel device (3) for the vehicle seat (1) and with a seat back (1.2) that can be swiveled relative to a seat part (1.1), the height adjustment and swivel device (3) having a joint arrangement (4) - a rocker (4.1) and a swivel joint (4.2) and - a coupling member (4.3) connecting the rocker (4.1) and the swivel joint (4.2) as well as a gear fitting (2) as a drive member for moving the swivel joint (4.2), wherein the swivel joint (4.2) is designed as a pin and slot guide and the gear fitting (2) acts on the coupling member (4.3) when the seat back (1.2) is pivoted via the pin and slot guide in such a way that a pivoting movement of the seat back (1.2 ) is decoupled in a slightly forward inclined position from a subsequent pivoting and lowering movement of the seat back (1.2) and the seat part (1.1) in a lowered and completely forward inclined position of the seat back, since ch characterized in that the coupling member (4.3) in the area of the swivel and sliding joint (4.2) has such an arc shape that a gear-side end of the coupling member (4.3) is designed corresponding to the gear bracket (2), the gear bracket (2) having a cover (2.1) which serves as a guide means for the coupling member (4.3) which slides on a region of the circumference of the cover (2.1).

Description

The invention relates to a vehicle seat with a seat back that can be pivoted relative to a seat part and a height adjustment and pivoting device for the vehicle seat according to the features of the preamble of claim 1.

A large number of motor vehicles are known whose interiors are designed for very different uses. A clever design and arrangement, in particular of the vehicle seats, can ensure that the space available in the vehicle can be adapted to different usage situations. So today are widely known vehicle seats whose backrests are not only adjustable in their inclination with respect to a seat, but whose backrests can be folded flat on the seat. A further gain in space is achieved by the fact that the seat can be lowered towards the floor when it is folded up. Such a seat is also referred to as a folding and diving seat (in English as a fold and dive seat) and is, for example, from the DE 10 2006 043 759 A1 and the EP 2 013 057 B1 known.

The object of the present invention is to provide a height adjustment and swivel device for a seat that is as simple as possible.

According to the invention, the object is achieved by a vehicle seat having the features specified in claim 1.

Advantageous embodiments of the invention are the subject of the subclaims.

The object is achieved according to the invention by a vehicle seat with a height adjustment and pivoting device for the vehicle seat with a seat back that can be pivoted relative to a seat part, the height adjustment and pivoting device being a joint arrangement with a rocker arm and a swivel joint and a coupling element connecting the rocker arm and the swivel and swivel joint comprises a gear fitting as a drive member for moving the swivel and slide joint, wherein the rotary slide joint is designed as a pin-and-slot guide and the gear-type fitting acts on the coupling member via the pin-and-slot guide.

Such a configuration of the height adjustment and pivoting device according to the invention enables the rocker arm (= output member) and the coupling member to be decoupled in some areas from the drive member, the gear fitting and the seat back, so that the seat back is pivoted, in particular folded or folded, relative to the seat part without moving the seat part can be tilted. In other words: the drive member and the seat back can be moved, in particular rotated or pivoted, relative to the output member and coupling member and independently of them over a distance that corresponds at most to the length of the slot.

In addition, such a simple and modular height adjustment and pivoting device has few and largely identical components and is therefore inexpensive and easy to design and assemble.

Furthermore, the invention enables a simple area-wise decoupling of the pivoting movement of the seat back in a slightly forward inclined position from a subsequent pivoting and lowering movement of the seat back and the seat part in a lowered and completely forward inclined position of the seat back, in particular in a floor or Table position in which the seat back is arranged largely parallel to the seat part. This improves the ease of use for a user, since, in particular, swiveling the seat back to the floor or table position too quickly is at least reduced or avoided, since when swiveling the seat back into the floor or table position, the user has an end stop of the swivel joint of the seat part must overcome the force of inertia of the seat part to be taken along.

In one possible embodiment of the invention, the seat back is part of the drive member and is designed as an articulated arm. In addition, the seat part can be part of the coupling member. Such a design of the invention advantageously keeps the number of components used low.

A further development of the invention provides that the coupling member is arcuate. In particular, the coupling member is bent in an S-shape. In this case, the coupling member in the area of the swivel and sliding joint has in particular such an arc shape that, according to the invention, it is designed to correspond to the gear fitting and enables a separate limited pivoting movement of the seat back relative to the seat part.

In one possible embodiment, the pin of the pin-slot guide is arranged on the backrest side and the slot is arranged on the seat part side. Alternatively, the pin can be designed on the seat part side, in particular fixed on the seat part, and the slot on the backrest side, in particular fixed on the backrest. The components of the pin-and-slot guide can be arranged directly on the seat part or on the seat back or indirectly on the latter via adapter elements.

A simple embodiment provides that the swivel joint is designed as part of the coupling member. The pin of the pin-slot guide can be arranged on the seat back and the slot in the coupling member. Alternatively, the pin of the pin-and-slot guide can be arranged on the coupling member and the slot in the seat back or in / on an adapter, in particular in / on a fitting part of the gear fitting.

A further development of the invention provides that the coupling member and / or the slot of the rotary sliding joint are or is arcuate. In particular, the coupling member is S-shaped and the slot is slightly bent into a C-shape. In this case, the coupling member in the area of the swivel and sliding joint has in particular such an arc shape that, according to the invention, it is designed to correspond to the gear fitting and enables a separate limited pivoting movement of the seat back relative to the seat part.

In one possible embodiment, the slot extends over an angular range of at least 30 ° to 50 °, in particular from 35 ° to 45 °.

In order to allow a sufficiently large distance of the independent movement of the seat back relative to the seat part, the arcuate slot extends over an angular range of at least 30 °, for example over an angular range of at least 40 ° or over an angular range of at least 60 °. The angular range is measured from the respective ends of the slot, starting from an axis of rotation of the associated joint, about which the associated articulated arm, in particular the seat back, can be rotated.

The angular range is determined depending on the requirements and wishes of the kinematics of the joint arrangement, according to which the angular range is designed to be larger in order to achieve a greater delay in the pivoting movement of the seat back.

According to the invention, the vehicle seat is equipped with such a height adjustment and swivel device. The height adjustment and pivoting device according to the invention includes the joint arrangement, which is designed as a coupling joint. The joint arrangement is designed in such a way that, in the coupling joint, a rigid dependence of the movements of the individual joint arms on one another is at least partially eliminated and thus decoupled.

It is very favorable to use the height adjustment and pivoting device according to the invention with such a joint arrangement for a vehicle seat that can be folded and lowered. Due to the partial decoupling of the movements of the seat part (or seat part frame) and seat back (or seat back frame), it is possible for the seat back to reach an intended position before its movement is coupled with a movement of the seat part. In this way, unwanted mutual blocking of the articulated arms can be reliably avoided and the movement of the seat back into a completely folded-down seat back position can be carried out in steps.

• 1 in Seitenansicht schematisch ein Ausführungsbeispiel einer erfindungsgemäßen Höhenverstell- und Schwenkvorrichtung,
• 2 schematisch in perspektivischer Darstellung ein Drehschubgelenk einer erfindungsgemäßen Höhenverstell- und Schwenkvorrichtung,
• 3A und 3B schematisch einen Fahrzeugsitz in einer Gebrauchs- oder Komfortposition mit einer erfindungsgemäßen Höhenverstell- und Schwenkvorrichtung in einer entsprechenden ersten Position und ein Drehschubgelenk der Höhenverstell- und Schwenkvorrichtung in einer entsprechenden ersten Gelenkposition,
• 4A und 4B schematisch einen Fahrzeugsitz in einer geneigten Position mit einer erfindungsgemäßen Höhenverstell- und Schwenkvorrichtung in einer entsprechenden zweiten Position und ein Drehschubgelenk in einer entsprechenden zweiten Gelenkposition,
• 5 schematisch einen Fahrzeugsitz in einer vollständig geklappten Position mit einer erfindungsgemäßen Höhenverstell- und Schwenkvorrichtung in einer entsprechenden dritten Position.

Exemplary embodiments of the invention are explained in more detail with the aid of the attached schematic figures. Show:

• 1 in side view schematically an embodiment of a height adjustment and swivel device according to the invention,
• 2 schematically in a perspective view a swivel joint of a height adjustment and pivoting device according to the invention,
• 3A and 3B schematically a vehicle seat in a use or comfort position with a height adjustment and swivel device according to the invention in a corresponding first position and a swivel joint of the height adjustment and swivel device in a corresponding first joint position,
• 4A and 4B schematically a vehicle seat in an inclined position with a height adjustment and swivel device according to the invention in a corresponding second position and a swivel joint in a corresponding second joint position,
• 5 schematically, a vehicle seat in a fully folded position with a height adjustment and swivel device according to the invention in a corresponding third position.

Corresponding parts are provided with the same reference symbols in all figures.

The 1 shows a schematic side view of a vehicle seat 1 with a relative to a seat part 1.1 swiveling seat back 1.2 .
The components of the vehicle seat 1 like the seat part 1.1 and the seat back 1.2 , each comprise a support part which, as shown schematically, is designed to be padded.

The arrangement of the vehicle seat 1 In the vehicle, the coordinate system used below defines a vertical axis z, a longitudinal axis x and a transverse axis y, the vertical axis z being parallel to the vehicle's vertical orientation, the longitudinal axis x parallel to the vehicle's longitudinal direction and the transverse axis y being parallel to the vehicle's transverse direction.

The vehicle seat 1 is in particular a front or a rear seat that can be temporarily positioned or moved in such a way that either more storage space is available in the vehicle interior or a passenger can get in or out more easily.

The seat back can 1.2 from a first position P1 , in particular a use or sitting position, in a second position P2 , in particular an inclined position or entry position, or in a third position P3 , in particular a stowage, loading floor or table position, can be pivoted forward or vice versa. In the third position P3 is the seat back 1.2 fully folded forward into a generally horizontal position in which they rest on the seat surface and thus the seat part 1.1 rests. In the first position P1 , the position of use or sitting position, the vehicle seat 1 is the seat back 1.2 , as in 1 shown, placed in a substantially vertical / upright or slightly reclined position.

For swiveling the seat back 1.2 relative to the seat part 1.1 between a sitting position and a stowage or loading floor position is in the area of a pivot axis S. at least one shaft (not shown), a gear fitting 2 and a height adjustment and swivel device 3 arranged. The shaft is in the side bushings of the seat part by means of a bearing 1.1 stored, at least on one side of the vehicle seat 1 a gear fitting 2 as a drive element for adjusting and pivoting the seat back 1.2 and on the opposite side of the vehicle seat 1 a pivot bearing are provided. Alternatively, it can be on both sides of the vehicle seat 1 a gear fitting 2 be arranged, which are coupled via the shaft.

The height adjustment and swivel device 3 includes a hinge assembly 4th with a swing arm 4.1 and a swivel joint 4.2 and one swing arm 4.1 and the swivel joint 4.2 connecting coupling link 4.3 .

The joint arrangement 4th is at the bottom on floor-mounted bearing blocks 5.1 , 5.2 hinged.

The swing arm 4.1 is designed as a front rocker in the longitudinal direction of the vehicle and at the front of the seat part 1.1 and on the front bearing block 5.1 articulated and supported.

In the rear area of the seat part 1.1 is the gear fitting 2 at the back of the seat part 1.1 and fixed to the floor on the rear bearing block 5.2 attached and supported.

The coupling link 4.3 is in the longitudinal direction of the vehicle at the front of the upper part of the swing arm on the seat part side 4.1 and on the backrest side on a lower part of the seat back 1.2 hinged as well as on the gear fitting 2 stored. In one possible embodiment, the coupling element is 4.3 arched or curved. In particular, the coupling element is 4.3 S-shaped or banana-shaped (also called banana link) curved.

The coupling link 4.3 in the area of the swivel joint 4.2 such an arc shape that the relevant transmission-side end of the coupling link 4.3 corresponding to the gear hardware 2 is formed and a separate limited pivoting movement of the seat back 1.2 relative to the seat part 1.1 enables.

As shown, the gear bracket 2 a cover 2.1 on that as a guide means for the coupling link 4.3 serves on an area of the perimeter of the cover 2.1 slides and so a canting of a slot 4.2.2 and a tenon 4.2.1 a pin and slot guide is avoided.

The gear fitting 2 serves as a drive element for moving the swivel joint 4.2 the joint arrangement 4th .

2 shows the swivel joint 4.2 in detail. The swivel joint 4.2 is as a tenon-slot guide with a backrest-side tenon 4.2.1 and a slot on the seat part 4.2.2 formed, the gear fitting 2 via the pin-and-slot guide of the swivel joint 4.2 and the cover 2.1 at least in sections on the coupling link 4.3 acts.

Here is the seat back 1.2 Part of the drive member and designed as an articulated arm, the seat back 1.2 at least with one component of the gear fitting 2 is coupled non-rotatably in a manner not shown.

The coupling link 4.3 couples the seat back 1.2 and the seat part 1.1 and their relative movement to each other.

As in 2 shown is the spigot 4.2.1 backrest fixed in the form of one of the seat backs 1.2 protruding pin or pins. The pin can 4.2.1 via an adapter 4.2.3 on the seat back 1.2 be attached. For example, the adapter 4.2.3 through a fitting upper part of the gear fitting 2 be educated.

The slot 4.2.2 is part of the coupling link 4.3 and formed in these arc-shaped. In particular, the slot 4.2.2 a slight C-shape.

Alternatively, the tenon 4.2.1 in a manner not shown in detail on the seat part side, in particular seat part fixed on the coupling member 4.3 , and the slot 4.2.2 on the backrest, in particular firmly on / in the seat back 1.2 or on / in the adapter 4.2.3 be trained.

The integration of the swivel joint 4.2 into the height adjustment and swivel device 3 of the vehicle seat 1 enables a separate limited pivoting movement of the seat back 1.2 relative to the seat part 1.1 without the seat part 1.1 is pivoted forward.

To allow the seat back to move independently a sufficient distance 1.2 opposite the seat part 1.1 to enable the arcuate slot extends 4.2.2 over an angular range α of at least 30 °, for example over an angular range α of at least 40 ° or over an angular range α of at least 60 °. The angular range α is done by the respective ends of the slot 4.2.2 measured, starting from the swivel axis S. of the associated swivel joint 4.2 to which the associated articulated arm, i.e. the seat back 1.2 , is rotatable.

The size of the angular range becomes α in particular by the delay to be achieved in the pivoting movement of the seat part 1.1 and thus the requirements placed on the kinematics of the joint arrangement 4th determined: the larger the angular range α , the more delayed the seat part becomes 1.1 emotional.

The clear width of the slot 4.2.2 is consistently larger than a diameter of the pin 4.2.1 so that this occurs when the seat back is moved 1.2 as an articulated arm in the direction of the course of the slot 4.2.2 along the slot 4.2.2 is guided and a possible pivoting of the seat back 1.2 relative to the coupling link 4.3 and the seat part 1.1 upon reaching the front end of the slot 4.2.2 is limited. Due to the limitation of the movement of the pin 4.2.1 is the seat back 1.2 over an angular range α limited by 45 ° around the swivel axis S. freely rotatable without affecting the coupling link 4.3 is transmitted.

As the movement of the seat back continues 1.2 towards the second position P2 becomes the spigot 4.2.1 towards the other end of the slot 4.2.2 pressed, with further movement of the seat back 1.2 towards the third position P3 the coupling link 4.3 through the tenon 4.2.1 is pushed. The end of the coupling link on the backrest side is optionally 4.3 slightly raised and slides at least in some areas on or on the outer circumference of the cover 2.1 along.

Such a configuration of the height adjustment and pivoting device according to the invention 3 is a partial decoupling of the front swing arm 4.1 (= Output link) and the coupling link 4.3 from the drive member, such as the gear fitting 2 and the seat back 1.2 , allows so that the seat back 1.2 without moving the seat part 1.1 relative to the seat part 1.1 pivoted, in particular inclined, can be. In other words: the drive link and the seat back 1.2 can cover a distance that is a maximum of the length of the slot 4.2.2 corresponds, relative to the output member (rocker 4.1 ) and coupling link 4.3 and moved independently of these, in particular rotated or pivoted.

The modular height adjustment and swivel device 3 few and largely identical components and is therefore inexpensive and easy to set up and assemble.

3A and 3B show the vehicle seat 1 and the height adjustment and swivel device 3 in the first position P1 , in which the seat back 1.2 largely perpendicular to the ground at an angle β of approx. 85 ° in a sitting or use position. The swivel joint 4.2 has a corresponding first joint position for this purpose G1 on in which the tenon 4.2.1 Seen in the vehicle longitudinal direction at the rear end stop of the slot 4.2.2 strikes.

4A and 4B show the vehicle seat 1 and the height adjustment and swivel device 3 in the second position P2 , in which the seat back 1.2 Seen in the longitudinal direction of the vehicle, slightly forward into the second position P2 for example, is inclined to an entry position. The swivel joint 4.2 has a corresponding second joint position for this purpose G2 on in which the tenon 4.2.1 Seen in the longitudinal direction of the vehicle at the front end stop of the
Slot 4.2.2 strikes.

Thus is the seat back 1.2 along the entire length of the slot 4.2.2 and thus over a corresponding angular range α pivoted forward by about 30 °, for example, without the seat part 1.1 moved or adjusted.

This results in a simple decoupling of the pivoting movement of the seat back in certain areas 1.2 into a slightly forward inclined position for easier entry from a subsequent pivoting and lowering movement of the seat back 1.2 and the seat part 1.1 into a lowered and completely forward tilted position of the seat back 1.2 , especially in the third position P3 , in a floor or table position, as shown in 5 is shown.

The seat part 1.1 together with another swiveling of the seat back 1.2 forward towards the seat part 1.1 by pivoting the front swing arm 4.1 in a given angular range δ pivoted by corresponding stops, not shown, for the rocker 4.1 is limited. The angular range δ is for example approx. 30 °, 35 °, 40 ° or 45 ° or 50 °.

In the starting position of the swing arm 4.1 especially in the first position P1 , the position of use, the vehicle seat 1 is the swing arm 4.1 at an angle γ for example positioned from about 75 ° or 80 ° or 85 °.

In the third position P3 of the vehicle seat 1 is the seat back 1.2 largely parallel to the seat part 1.1 arranged. When swiveling the seat back 1.2 in the floor or table position one must therefore be at the front end stop of the swivel joint 4.2 of the seat part 1.1 applied inertial force of the seat part to be taken along 1.1 to be overcome. This improves the ease of use for a user, in particular because the seat back is pivoted too quickly 1.2 in the floor or table position (= third position P3 ) is at least reduced or avoided, as the seat back is swiveled forward 1.2 in this floor or table position one on the front end stop of the swivel joint 4.2 , ie at the end stop of the slot 4.2.2 , applied inertial force of the seat part to be taken 1.1 must be overcome.

The joint arrangement 4th is designed according to the embodiment as a coupling joint, with a rigid dependence of the movements of the individual articulated arms (rocker 4.1 and seat back 1.2 ) is at least partially canceled from each other and thus decoupled. Due to the partial decoupling of the movements of the seat part 1.1 (or seat frame) and seat back 1.2 (or seat back frame) it is possible that the seat back 1.2 a designated second position P2 achieved before a coupling their movement with a movement of the seat part 1.1 he follows. This can lead to an unwanted mutual blocking of the articulated arms, namely the rear seat back 1.2 and the front swing arm 4.1 , reliably avoided and the movement of the seat back 1.2 in the fully folded third position P3 be executed in stages.

List of reference symbols

1

Vehicle seat

1.1

Seat part

1.2

Seat back

2

Gear fitting

2.1

cover

3

Height adjustment and swivel device

4th

Joint arrangement

4.1

Swing arm

4.2

Swivel joint

4.2.1

Cones

4.2.2

slot

4.2.3

adapter

4.3

Coupling link

5.1, 5.2

Bearing block

G1

first joint position

G2

second joint position

P1

first position

P2

second position

P3

third position

S.

Swivel axis

α

Angular range of the slot

β

Angle between seat back and floor

γ

Angle between swing arm and floor

δ

Angular range of the swing arm

Claims (9)

Vehicle seat (1) with a height adjustment and swivel device (3) for the vehicle seat (1) and with a seat back (1.2) that can be swiveled relative to a seat part (1.1), the height adjustment and swivel device (3) having a joint arrangement (4) - a rocker (4.1) and a swivel joint (4.2) and - a coupling member (4.3) connecting the rocker (4.1) and the swivel joint (4.2) as well as - a gear fitting (2) as a drive member for moving the swivel joint (4.2), wherein the swivel joint (4.2) is designed as a pin and slot guide and the gear fitting (2) acts on the coupling member (4.3) when the seat back (1.2) is pivoted via the pin and slot guide in such a way that a pivoting movement of the seat back (1.2 ) is decoupled from a subsequent pivoting and lowering movement of the seat back (1.2) and the seat part (1.1) in a lowered and completely forward inclined position, since characterized in that the coupling member (4.3) in the area of the rotary thrust joint (4.2) has an arc shape such that a gear-side The end of the coupling member (4.3) is designed to correspond to the gear fitting (2), the gear fitting (2) having a cover (2.1) which serves as a guide means for the coupling member (4.3) which extends over a region of the circumference of the cover (2.1) slides. Vehicle seat (1) according to Claim 1 , characterized in that the coupling member (4.3) is arcuate. Vehicle seat (1) according to Claim 2 , characterized in that the coupling member (4.3) is bent into an S-shape. Vehicle seat (1) according to one of the preceding claims, characterized in that a pin (4.2.1) of the pin-slot guide is arranged on the backrest side and a slot (4.2.2) is arranged on the seat part side or vice versa. Vehicle seat (1) according to one of the preceding claims, characterized in that the swivel joint (4.2) is designed as part of the coupling member (4.3). Vehicle seat (1) according to one of the preceding claims, characterized in that a pin (4.2.1) of the pin-slot guide is arranged on the seat back (1.2) and a slot (4.2.2) in the coupling member (4.3) or vice versa are. Vehicle seat (1) according to one of the preceding Claims 4 to 6th , characterized in that the slot (4.2.2) is arcuate. Vehicle seat (1) according to one of the preceding Claims 4 to 6th , characterized in that the slot (4.2.2) extends over an angular range (α) with an angle of at least 30 ° to 50 °. Vehicle seat (1) according to Claim 8 , characterized in that the slot (4.2.2) extends over an angular range (α) with an angle of 35 ° to 45 °.

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