WO2019110478A1

WO2019110478A1 - Vehicle seat

Info

Publication number: WO2019110478A1
Application number: PCT/EP2018/083292
Authority: WO
Inventors: Rolf Schueler; Tobias SCHAFFERT
Original assignee: Adient Engineering and IP GmbH
Priority date: 2017-12-05
Filing date: 2018-12-03
Publication date: 2019-06-13
Also published as: WO2019110477A1; DE112018006211A5; DE112018006209B4; DE112018006209A5

Abstract

The invention relates to a vehicle seat (1), in particular a motor vehicle seat, having a seat part (2), which is arranged on a seat substructure (6), and a backrest (4), which is arranged on the seat part (2) or the seat substructure (6) in a pivotal manner about a backrest pivot axis (A) by means of a backrest fitting, wherein the vehicle seat (1) has a seat belt (30) with a three-point design. The seat belt (30) is guided through a belt outlet (40) arranged in the upper lateral region of the backrest (4), and means are provided for reducing a moment load or force load acting in the region of the backrest fitting.

Description

VEHICLE SEAT

The invention relates to a vehicle seat, in particular motor vehicle seat,

having a arranged on a seat base seat part, a pivotable about a backrest pivot axis on the seat part or the seat base arranged backrest by means of a backrest fitting, wherein the vehicle seat has a seat belt in three-point construction, wherein the seat belt is guided by a arranged in the upper lateral region of the back belt exit.

State of the art

By far the largest number of seats used in vehicles today, the person sitting in the vehicle seat is held in the event of a frontal crash by a three-point belt system. Usually this is an upper one

Connection point connected to the B-pillar of the vehicle. The buckle and Gurtendbeschlag are usually connected in each case a connection point with an upper rail of the vehicle seat, so that a Lehnenneigungseinsteller and Sitzhöheneinstellsystem need only take a relatively small proportion of the forces occurring in the connection points.

A seat belt integral seat is a seat for a vehicle that incorporates all the desired functions of the seat, including the function of the seat belt.

This allows belt integral seats to be removed as a whole from a vehicle and used. Belt integral seats have a seat base with which they can be attached to a floor assembly of the motor vehicle. The seat substructure may comprise a longitudinal adjustment device with two pairs of rails. From the seat substructure the seat part is worn. The seat part can be adjustable by means of an adjusting device in the fleas and / or the seat inclination. A backrest of the

Belt integral seat is attached to the seat part or the seat base. Finally, the belt integral seat has a seat belt device with a Gurtaufrollautomaten. In this case, the prior art knows two different configurations: There are Gurtintegralsitze in which the Gurtaufrollautomat is arranged in the backrest. The belt winder is assigned there primarily to the shoulder belt. However, this arrangement of the Gurtaufrollautomaten takes away valuable space within the passenger compartment. The distance between passengers sitting behind each other is determined by the Gurturollautomaten. In another embodiment, the Gurtaufrollautomat associated with the seat base. The belt retractor is located in the rear side area of the seat base. This results in a favorable introduction of the accident-related forces and a space-saving arrangement.

From DE 43 30 011 A1 a Gurtintegralsitz is known in which a three-point seat belt is arranged on the vehicle seat, wherein for providing a Gurtumlenkpunktes a belt reel is attached directly to the frame, in the upper, lateral region of the seat back.

task

The invention is based on the object to improve a vehicle seat of the type mentioned, in particular, without the need for a reinforcement of a Lehneneinstellers, a load-carrying capacity of the vehicle seat in

Increase crash case.

solution

This object is achieved according to the invention by a vehicle seat, in particular for motor vehicles, having a seat part arranged on a seat substructure, a backrest fitting about a Lehnenschwenkachse pivotally mounted on the seat part or on the seat base back, wherein the vehicle seat has a seat belt in three-point construction, wherein the seat belt is guided by a arranged in the upper lateral region of the back Gurtaustritt, said means for reducing a in the region of the backrest fitting acting moment load or force load, in particular caused by acting in the region of the belt outlet belt force, are provided.

Characterized in that means are provided for reducing an acting in the region of the backrest fitting moment load or force, caused by occurring belt forces, and acting on the backrest and backrest fittings moments can be reduced. As a result, the backrest fitting, compared with currently used backrest fittings, in the case of a crash in a particularly advantageous manner withstand higher belt forces, or the backrest fitting for the purpose of further weight reduction can be adjusted accordingly.

Advantageous embodiments, which can be used individually or in combination with each other, are the subject of the dependent claims.

All backrest fittings can be used as a snap fitting or as a

Be executed gearbox fitting. At least one backrest fitting can be a catch fitting. A catch fitting may have a first fitting part and a second fitting part. The first fitting part and the second fitting part may be rotatable relative to each other. The latching fitting may comprise at least one latch, which is movably guided in one of the two fitting parts between a locked state and an unlocked state, and which cooperates in the locked state with a toothed rim of the other of the two fitting parts. A catch fitting is for example from the

DE 10 2006 015 560 B3. A catch fitting is also referred to as a discontinuous backrest fitting. In particular for the electrification of the vehicle seat according to the invention, at least one backrest fitting can be designed as a geared fitting. A geared fitting is also available as a continuous backrest fitting or

Tumble fitting designated. A geared fitting is known for example from DE 10 2010 022 615 A1. In combination with an electric drive, for example, a geared fitting allows an electrically operated

Inclination adjustment of the backrest.

The vehicle seat may be a belt integral seat.

One end of the seat belt can by means of a Gurtendbeschlags am

Seat substructure to be fixed. The seat belt can with a on the

Gurtendbeschlag be arranged in the transverse direction opposite side of the seat base belt buckle connectable. At least on a tunnel side or a rocker side of the vehicle seat, a Gurtkrafteinleitungshebel may be provided. On the tunnel side and the sill side can each one

Gurtkrafteinleitungshebel be provided.

The Gurtkrafteinleitungshebel, especially on the tunnel side, a

Have a receptacle for fixing a Gurtendbeschlags. The

Gurtkrafteinleitungshebel, especially on the sill side, can one

Attachment point for attaching a buckle. The receptacle for fastening the Gurtendbeschlags can be spaced from the backrest fitting. The attachment point for fastening the buckle can of the

Lehnenbeschlag be spaced.

The Gurtkrafteinleitungshebel can be connected by means of a parallelogram mechanism with the backrest. The parallelogram mechanism can have two wings. The Gurtkrafteinleitungshebel may be connected to a gear ratio with the backrest. The Gurtkrafteinleitungshebel may be pivotally connected to the backrest. The Gurtkrafteinleitungshebel can by means of a

self-locking geared motor to be connected to the backrest. Here can be adjusted by means of the gear motor, an angular position of the Gurtkrafteinleitungshebels relative to the backrest, whereby the leverage of the attacking forces, in particular relative to each other, are adjustable. The Gurtkrafteinleitungshebel can be rotatably connected to the backrest.

The seat belt can be between the belt exit and one on the

Seat belt acting Gurtaufrollautomat be deflected in the area of the backrest fitting. The seat belt may be deflected between the belt exit and a belt retractor connected to the seat belt in the region of a rear upper portion of the seat base. A belt retractor connected to the seat belt may be connected to the upper seat rail. The belt retractor can in the area of a front rocker of

Height adjuster to be connected to the upper seat rail.

The inclusion of all belt forces above the seat rails is for the fulfillment of the requirements resulting from extended Einstellspektren in vehicle seats of autonomous or teilautautonom driving vehicles particularly advantageous. The occurring three belt forces on the upper edge of the backrest, on the buckle and on the Gurtendbeschlag, can in this way derat in the structure of

Vehicle seat are introduced that they partially compensate and thus the ultimately acting on the elements of the individual adjustment mechanisms, resulting forces or moments are not significantly higher than in only partially initiated in the seat belt forces.

The example of a Lehneneinstellers the solution of the invention shows advantages, especially when compared to the load of a known from the prior art vehicle seat, in which only the upper Gurtpunkt acts on the upper edge of the backrest and consequently derived from the back torque in the event of a crash in full from the product of the size of the force and the

Lever arm for backrest adjuster results. According to an exemplary embodiment of the proposed solution, two further belt forces from the lap belt area, in particular through the Gurtendbeschlag and the buckle, effective, but due to the geometric arrangement of the respective attachment points of the Gurtendbeschlags and the buckle in close proximity to the point of attachment of the backrest to the seat part such that that exerted by the belt forces moment about the backrest pivot axis in the opposite direction of action to the moment at the top of the backrest is.

According to a further embodiment, it is provided that with

Additional measures the belt forces from the buckle and the end fitting are also introduced into the back and thus acting on the same component, the two opposing forces acting in opposite directions around the Lehnenschwenkachse mutually compensate at least partially, resulting in a much lower total moment load for the Lehneneinsteller. At low adjustment ranges of the Lehnenneigungswinkels you can extend the backrest in the lower area so down and forward that it reaches into the required area of the other Gurtanbindungspunkte (buckle and Endbeschlag), and there directly arrange the other belt points, which in different directions partially cancel the same component attacking moments.

Furthermore, instead of a joint compensation mechanism, of course, other principles of action such as planetary or differential gear for

Angle compensation and power transmission or torque transmission

Find application, as far as the associated effort and required

Space is in favorable ratio to the classic solution of reinforcement of existing Lehneneinsteller stands.

In addition to the use of such mechanisms for optimizing the respective local loads in blocking elements or blocking drives, the fact that such vehicle seats are electrically adjustable with respect to the Flaupteinstellfunktionen leads to mechatronic solutions. While in manual adjusters kinematic movements and elements for power transmission designed in such a way are that the function and load suspension is given at all times, even during a setting operation of a single adjustment function, in an all-electric design is also an automatic electrical tracking of a second adjustment during the adjustment of a first

Adjustment by the user possible.

In the case of an angle compensation, the parallelogram mechanism is replaceable by a self-locking geared motor between Gurtkrafteinleitungshebel and backrest. This gear motor is synchronized in electrical backrest adjustment operated in opposite directions, whereby the connection points of the Gurtendbeschlags and the buckle are held in their predetermined position. This principle of mechatronic compensation of relative movements in adjusting the inclination of the backrest can also be combined with other means for reducing the torque in the vehicle seat.

Figures and embodiments of the invention

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

Prior art known vehicle seats and advantageous

Embodiments explained in more detail. However, the invention is not limited to these

Embodiments limited. Show it:

1 shows a sketch of a generic vehicle seat without representation of a belt system,

2 shows an illustration of a generic vehicle seat according to FIG. 1 with an introduction of a belt force in the rear region of a vehicle

Longitudinal adjuster,

3 shows an illustration of a generic vehicle seat according to FIG. 1 with an introduction of a belt force in the rear region of a seat part, FIG. 4 shows a representation of the generic vehicle seat of FIG. 3 with an introduction of a belt force in the region of an upper edge of the backrest, FIG.

5 shows an illustration of a vehicle seat according to the invention according to a first exemplary embodiment, with an introduction of a belt force in the region of a lower edge and an upper edge of the backrest,

6 shows an illustration of a vehicle seat according to the invention according to a second embodiment, with a parallelogram mechanism, and

7 shows an illustration of a vehicle seat according to the invention in accordance with a third embodiment, with a Gurtaufrollautomaten in the region of a front foot of the height adjuster.

Several vehicle seats 1 shown schematically in the figures are described below using three mutually perpendicular spatial directions. In the case of a vehicle seat 1 installed in the vehicle, a longitudinal direction x extends largely horizontally and preferably parallel to a vehicle longitudinal direction which corresponds to the usual direction of travel of the vehicle. A transverse to the longitudinal direction x perpendicular transverse direction is also aligned horizontally in the vehicle and extends parallel to a

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

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

Vehicle axis.

The position and direction used, such as front, back, top and bottom refer to a line of sight in one

Vehicle seat 1 seated occupant in normal sitting position, the vehicle seat 1 installed in the vehicle, in a suitable for passenger transport Use position with upright back 4 and aligned as usual in the direction of travel. However, an inventive vehicle seat 1 can also be installed in a different orientation, for example, transversely to the direction of travel.

Fig. 1 shows a known from the prior art vehicle seat 1 in a side view, wherein no safety belt system is shown. The vehicle seat 1 has a seat part 2 arranged on a seat substructure 6 as well as a backrest 4 which is pivotally arranged on the seat part 2 or on the seat substructure 6. The back 4 is pivotally mounted about a backrest pivot axis A by means of a backrest fitting. For unlocking and tilt adjustment of the backrest 4 is manually, for example by means of an operating lever, a transmission rod rotated, which is arranged horizontally in the transition region between the seat part 2 and backrest 4. On one of the two sides of the vehicle seat 1, the transmission rod engages in a backrest fitting. On the other hand, the transmission rod is mounted in a pivot bearing or an identical second backrest fitting between the seat part 2 and backrest 4. The seat base 6 has a longitudinal adjuster 10 and a Flöheneinsteller 20. The height adjuster 20 carries a padded seat frame. The seat frame has a seat frame part 26 on both seat sides. The seat frame parts 26 may be interconnected by means of transverse tubes. The longitudinal adjuster 10 has an upper seat rail 14 and a guided in the upper seat rail 14 lower seat rail 12, wherein the upper seat rail 14 is displaceable in an unlocked state relative to the lower seat rail 12.

2, the vehicle seat 1 of Fig. 1 with a seat belt 30 in

Equipped with three-point construction, wherein the seat belt 30 is deflected in a arranged in the upper lateral region of the backrest 4 belt outlet 40. The webbing of the safety belt 30 is partially storable in a Gurtaufrollautomat, not shown in FIG. 2, which is preferably arranged in the backrest 4, storable. The safety belt 30 is fixed by means of a Gurtendbeschlages on the vehicle seat 1, in this case at a rear end of the longitudinal adjuster 10. The

Seat belt 30 is further secured to a buckle by means of a buckle 34. Attachment point fixable, which on the Gurtendbeschlag

opposite side of the vehicle seat 1 is arranged. The seat belt 30 is corresponding to its two sections, substantially between the

Gurtendbeschlag and the closed buckle 34 as a lap belt and between the closed buckle 34 and the belt outlet 40 as

Shoulder strap articulated. In this case, the safety belt 30 runs in the as

Shoulder belt designated first portion of the Gurtaufrollautomaten via a belt outlet 40 to a buckle 34. The safety belt 30 extends after a deflection on the buckle 34 on the designated as lap belt second section to a Gurtendbeschlag.

In the vehicle seat 1 of FIG. 2, the buckle 34 is attached to the upper seat rail 14. The Gurtendbeschlag opposite the belt buckle 34 viewed in the transverse direction is attached to one of the upper seat rails 14 parallel second upper seat rail of the longitudinal adjuster 10. A four - joint kinematics of the

Height adjuster 20 is defined by four pivot points I, II, III, IV. A front rocker 22 is connected in a first hinge point I with the seat part 2, in particular the seat frame part 26, and in a second hinge point II with the longitudinal adjuster 10, in particular the upper seat rail 14. Further, a rear one

Swingarm 24 in a third hinge point III with the seat part 2, in particular the seat frame part 26, and in a fourth hinge point IV with the longitudinal adjuster 10, in particular the upper seat rail 14, respectively. The four-joint kinematics can be driven and blocked, for example, by means of a drive known from WO 2014/057091 A1.

Fig. 3 shows a known from the prior art vehicle seat 1 with an introduction of the lap belt forces in the height adjuster 20, wherein the

Belt buckle 34 and the Gurtendbeschlag are fixed in a rear upper portion of the height adjuster 20. The remaining structure of the vehicle seat 1 shown in FIG. 3 corresponds to the vehicle seat 1 of FIG. 2 described above. Fig. 4 shows the vehicle seat 1 of Fig. 3, wherein an introduced by the seat belt 30 and in the region of the upper edge of the backrest 4 engaging first force F1, which acts on the backrest 4, is located. Also shown is a torque M1 resulting from the first force F1 about the backrest pivot axis A, which must be relayed by the backrest fittings into the seat part 2 or the seat base 6.

Fig. 5 shows symbolically a first embodiment for reducing the effective Lehneneinstellermomente. There are those on the vehicle seat 1 with

Belt integration acting belt forces shown. The moments M1, M2 acting around the backrest pivot axis A of the backrest adjuster, in the present case the backrest fitting, are shown. As can be seen from the orientations of the moments M1, M2, any solution that does not direct the pelvic forces directly into the fleas adjuster 20 but produces an effect about the backrest pivot axis A will thus result in an addition of the two moments and due to their different orientations a reduction of a resulting moment around the

Backrest pivot axis A. In an ideal case, those around the

Lehnenschwenkachse A acting moments M1, M2 the same size so that they completely compensate each other.

In this case, a Gurtkrafteinleitungshebel 42, in the present case in the form of an integrally ausgestaltetten extension of the backrest 4, in the area of

Gurtanbindungspunkte, in this case the Gurtendbeschlag and the buckle 34. The connection of the Gurtendbeschlags and the buckle 34 with the backrest 4 takes place in this area. The schematic representation shows a force arrow F2 corresponding to a force acting through the lap belt.

Fig. 6 shows a detail of a vehicle seat 1 according to a second

Embodiment with a parallelogram mechanism having compensation mechanism. A transfer of the over the lap belt

introduced force F2 in the backrest 4 is not to reduce the torque in the backrest fitting over the entire adjustment range of the backrest inclination of For example, 50 degrees to the rear required, since in very far backward pivoted back 4 according to the reclining positions the torque M1 in the backrest fitting causing force F1 to the Lehnenoberkannte is significantly lower than in the usual position of use of the backrest 4 at about 25 degrees inclination Vertical direction z. A mechanism functioning only in the range of about 30 degrees relative to the vertical direction z for compensating the force F1 on the upper edge of the backrest and for transmitting the force F2 acting on the lap belt into the backrest 4 is therefore already of great advantage for the overall design and thus already makes it possible the use of a backrest fitting developed for standard seats in belt integral seats with such an additional mechanism.

The parallelogram mechanism acts between an eccentric to

Lehnenschwenkachse A stored Gurtkrafteinleitungshebel 42 and the

pivotable back 4. In the backrest 4 is a belt force introduction lever 42 from the acting on the Gurtendbeschlag and the buckle 34

Belt forces combined individual force F2 is initiated and thus generates a reducing counter-torque to the force F1 on the Lehnenoberkannte.

Preferably, the Gurtkrafteinleitungshebel 42 is preferably a single, over the entire width of the vehicle seat 1 extending component to the in

Connection point of the buckle 34 acting forces on the inner side of the seat and acting in the Gurtendbeschlag forces spatially summarized on the outer side of the seat and generate on the side of the application of force of the shoulder belt the counter-torque. Likewise, it is conceivable to arrange a bilateral separate compensation kinematics between the connection points of the lap belt and the backrest 4 and thus to avoid the use of an inevitably rigid and torsionally rigid component in the small available space.

Fig. 7 shows symbolically a second embodiment of the vehicle seat 1 according to the invention with a seat belt 30, which in the upper region of

Belt outlet 40 of the backrest 4 is deflected at a Gurtumlenkpunkt 38, guided in the rear region of the back 4 down, in the region of the rear, upper Joint of the height adjuster 20 is deflected again and finally secured by means of a Gurtaufrollautomaten 36 in the region of the front rocker 22 on the upper seat rail 14. This arrangement acts in such a way that the seat belt 30, which is deflected downwards in the rear region of the back 4, at least slightly reduces the torques in the backrest fitting. The deflection around the rear upper hinge point of the Höheneinstellers 20 also holds the change in length of the seat belt 30 during an adjustment of the seat height in a tolerable for the user measure. The attachment of the Gurtaufrollautomaten 36 front of the upper seat rail 14 allows short ways to dissipate the forces in a vehicle floor. The Gurtaufrollautomat 36 preferably has a belt tensioner.

The features disclosed in the foregoing description, the claims and the drawings may, both individually and in combination for the realization of the invention in its various embodiments of

Meaning.

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

Revelation, the figures and the claims.

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

1 vehicle seat

2 seat part

4 backrest

6 seat substructure

10 longitudinal adjuster

12 lower seat rail

14 upper seat rail

20 height adjusters

22 front swingarm

24 rear swingarm

26 seat frame part

30 seat belt

34 buckle

36 Belt Winder

38 belt deflection point

40 belt exit

42 Gurtkrafteinleitungshebel

I first pivot point

11 second hinge point

III third pivot point

IV fourth hinge point

F1 first force

F2 second force

M1 moment (about the backrest pivot axis)

M2 moment (about the backrest pivot axis)

A backrest pivot axle

x longitudinal direction

z vertical direction

Claims

claims

1. Vehicle seat (1), in particular motor vehicle seat, comprising a seat part (2) arranged on a seat substructure (6), pivotable on the seat part (2) or on the backrest fitting about a backrest pivot axis (A)

Seat backrest (4), wherein the vehicle seat (1) has a safety belt (30) in three-point construction, wherein the seat belt (30) through a in the upper lateral region of the backrest (4) arranged belt outlet (40) is guided,

characterized in that

Means are provided for reducing an acting in the region of the backrest fitting moment load or force load.

2. Vehicle seat (1) according to claim 1, wherein the vehicle seat (1) a

Belt integral seat is.

3. Vehicle seat (1) according to one of claims 1 or 2, wherein at least on a tunnel side or a rocker side of the vehicle seat (1) a Gurtkrafteinleitungshebel (42) is provided.

4. Vehicle seat (1) according to claim 3, wherein on the tunnel side and the

Threshold side ever a Gurtkrafteinleitungshebel (42) is provided.

5. Vehicle seat (1) according to one of claims 3 or 4, wherein the

Gurtkrafteinleitungshebel (42), in particular on the tunnel side, a

Receiving attachment for fastening a Gurtendbeschlags.

6. Vehicle seat (1) according to one of claims 3 to 5, wherein the

Gurtkrafteinleitungshebel (42), in particular on the sill side, a connection point for attachment of a buckle (34).

7. Vehicle seat (1) according to one of claims 5 or 6, wherein the receptacle for fastening the Gurtendbeschlags and / or the connection point for fastening the buckle (34) is spaced from the backrest fitting.

8. Vehicle seat (1) according to one of claims 3 to 7, wherein the

Gurtkrafteinleitungshebel (42) is connected by means of a parallelogram mechanism with the backrest (4).

9. Vehicle seat (1) according to one of claims 3 to 7, wherein the

Gurtkrafteinleitungshebel (42) pivotally connected to the backrest (4) is connected.

10. Vehicle seat (1) according to one of claims 3 to 7, wherein the

Gurtkrafteinleitungshebel (42) with a gear ratio with the backrest (4) is connected.

11. Vehicle seat (1) according to one of claims 3 to 7, wherein the

Gurtkrafteinleitungshebel (42) by means of a self-locking gear motor with the back (4) is connected.

12. Vehicle seat (1) according to claim 11, wherein by means of the geared motor, an angular position of the Gurtkrafteinleitungshebels (42) relative to the backrest (4) is adjustable.

13. Vehicle seat (1) according to one of claims 3 to 7, wherein the

Gurtkrafteinleitungshebel (42) rotatably connected to the back (4) is connected.

14. Vehicle seat (1) according to one of claims 1 to 12, wherein the

Seat belt (30) between the belt outlet (40) and one with the

Seat belt (30) connected Gurtaufrollautomaten (36) in the region of the backrest fitting or in the region of a rear upper portion of the seat base (6) is deflected.

15. Vehicle seat (1) according to claim 14, wherein the Gurtaufrollautomat (36) in the region of a front rocker (22) of the height adjuster (20) with the upper seat rail (14) is connected.