WO2014118034A1

WO2014118034A1 - Inclination adjuster for a vehicle seat, and vehicle seat

Info

Publication number: WO2014118034A1
Application number: PCT/EP2014/051123
Authority: WO
Inventors: Viktor Enns; Thomas Dill
Original assignee: Johnson Controls Components Gmbh & Co. Kg
Priority date: 2013-01-29
Filing date: 2014-01-21
Publication date: 2014-08-07
Also published as: DE102013001805B3

Abstract

The invention relates to an inclination adjuster (30) for a vehicle seat (1) having a seat frame (10) with two side parts (11), comprising a driving device (31) by means of which a crosspiece (54) is movable relative to the side parts (11), and an adjustment arm (40) which is pivotable about a pivot axis (58), wherein the crosspiece (54) is connected to the adjustment arm (40) in a region thereof which faces away from the pivot axis (58). The driving device (31) is arranged here on the adjustment arm (40) and between the two side parts (11) of the seat frame (10), and the driving device (31) comprises a pinion (32) which is in engagement with a toothed part (42) arranged on a side part (11). The invention also relates to a vehicle seat (1) which comprises an inclination adjuster (30) according to the invention.

Description

TILT ADJUSTMENT FOR A VEHICLE SEAT AND VEHICLE SEAT

The invention relates to a tilt adjuster for a vehicle seat with the features of the preamble of claim 1. The invention also relates to a vehicle seat with the features of claim 14.

State of the art

From DE 20 2008 014 720 U1 a generic inclination adjuster and a generic vehicle seat are known. The inclination adjuster has a tubular, transversely extending cross-beam, which is height adjustable by means of a geared impact. The geared fitting comprises two relatively pivotable fitting parts. One of the two

Fitting parts is connected to a side part of a seat frame of the vehicle seat. The other fitting part is connected to the cross-beam. The geared fitting is manually driven by means of a drive device designed as a handwheel.

If the geared fitting is driven by means of the drive device, it pivots the two fitting parts relative to one another. Through this

Swinging movement changes the height of the crossbar relative to the

Side part of the seat frame of the vehicle seat. A resting on the side part of the seat frame and on the crossbeam seat cushion with seat is raised or lowered by such a change in height of the crossbeam in the front region, whereby the inclination of the seat cushion is changed.

The trained as a handwheel drive means by which the

Tilt adjuster is adjustable, is arranged for an occupant easily accessible laterally from the seat cushion. The handwheel projects laterally out of the seat frame and towers over the seat cushion in the transverse direction. This increases the width of the vehicle seat.

From DE 10 2010 003 718 A1 an adjusting device for seat height or tilt adjustment of a vehicle seat is known, which has a drive device with a pinion, which is in engagement with a toothed part. The tooth part is arranged on a separate rack.

From DE 26 46 839 C2, a vehicle seat is known, which comprises a motor-adjustable and equipped with six movement possibilities seat holder. Among other things, a tilt adjustment is possible.

task

The invention is based on the object to improve a tilt adjuster and a vehicle seat of the type mentioned above and in particular to design and arrange the inclination adjuster such that the width of the vehicle seat is minimized.

solution

This object is achieved by an inclination adjuster with the features of claim 1 and by a vehicle seat with the features of claim 14, which comprises a tilt adjuster according to the invention. Advantageous embodiments, which can be used individually or in combination with each other, are the subject of the dependent claims. A generic inclination adjuster for a vehicle seat, which has a seat frame with two side parts, comprises a drive device, by means of which a crossbar is movable relative to the side parts, and a pivotable about a pivoting adjustment arm, wherein the crossbar in a pivot axis remote from the region of the adjustment with this is connected.

According to the invention, the drive device is arranged on the adjusting arm and between the two side parts of the seat frame, and the

Drive device comprises a pinion which engages with a toothed part arranged on a side part.

As a result, no part of the inclination adjuster projects laterally out of the seat frame. As a result, the width, ie the extension in the transverse direction of the seat part and the vehicle seat is minimized.

Advantageously, the drive device is arranged at a distance from the pivot axis on the adjustment. As a result, the drive device moves with a tilt adjustment with the cross-beam and the seat cushion and thus retains, at least approximately, their position relative to an occupant of

Vehicle seat.

In this case, the drive device is preferably arranged near the crossbeam on the adjustment arm. According to an advantageous embodiment of the invention, the drive device is designed as a stepping gear. This allows the occupant of the Vehicle seat a relatively simple operation of the tilt adjuster below the seat cushion.

Preferably, the drive device in this case has a drive lever, which projects forward in the direction of travel, whereby the operation of the

Tilt adjuster is further simplified.

The tooth part preferably forms an edge of a slot introduced into a guide element.

Preferably, the tooth part is concave.

The tooth part has teeth which are arranged on a circular path, the center of which is preferably located on the pivot axis. The arrangement of the teeth then corresponds to the curve that passes through the adjusting arm in a pivoting movement relative to the side part.

Advantageously, the guide element is also arranged between the two side parts of the seat frame, and thereby does not protrude laterally out of the seat frame.

To prevent the pinion from moving out of the elongated hole of the guide element, a securing disk whose diameter is greater than the width of the elongated hole of the pinion is arranged on an end face of the pinion

Guide member.

The pinion is preferably rotatable about an axis of rotation which is parallel to the pivot axis, whereby the inclination adjuster is made relatively compact. According to an advantageous embodiment of the invention, the cross-beam is connected to the side facing away from the adjusting arm with a bearing arm, which is also pivotally mounted about the pivot axis.

If the vehicle seat also comprises a height adjuster which has a four-bar linkage, then the center axis of a pivot point of the height adjuster about which a front rocker of the four-bar joint pivots relative to the side part lies advantageously on the pivot axis of the adjusting arm. As a result, the same pivot point for the inclination adjuster and for the height adjuster can be used simultaneously, whereby an additional joint is saved and thus the required space is reduced.

Figures and embodiments of the invention

In the following the invention is explained in more detail with reference to an advantageous embodiment shown in the figures. However, the invention is not limited to this embodiment. Show it:

1 is a schematic representation of a vehicle seat,

2 is a perspective view of a seat part,

3 is a side view of the seat part of FIG. 2,

4 is a plan view of a tilt adjuster of the seat part of Fig. 2,

5 shows a perspective view of a drive device of the

Tilt adjuster of Fig. 4 and

6: a perspective view of the drive device

opposite side of the tilt adjuster of FIG. 4th A vehicle seat 1 for a motor vehicle has a seat part 2, which has a

Seat frame 10 includes, and attached thereto, tilt adjustable

Backrest 14 on. The arrangement of the vehicle seat 1 within the vehicle and its usual direction of travel define those used below

Directional information. In this case, a direction oriented perpendicular to the roadway is hereinafter referred to as vertical direction and a direction perpendicular to the vertical direction and perpendicular to the direction of travel is hereinafter referred to as

Transverse direction.

By means of a laterally arranged, manually, in particular by means of a

Handwheel, to use Lehneneinstellbeschlags 19, the backrest 14 is tilt-adjustable, that is, the angle between the seat part 2 and the backrest 14 is adjustable. As an alternative to the handwheel, an electric drive for the backrest adjustment fitting 19 is also conceivable.

At the upper end in the vertical direction of the backrest 14, which faces away from the seat part 2, is also a height adjustable and tilt adjustable

Headrest 13 attached.

By means of a longitudinal adjuster, which two with the vehicle floor of the

Motor vehicle has connected lower rails 15 and two connected to the vehicle seat 1 upper rails 17, the vehicle seat 1 is longitudinally adjustable. This means that the seat part 2 is together with the backrest 14 in

Longitudinal direction, which corresponds approximately to the direction of travel, adjustable. For this purpose, each of the top rails 17 is slidably guided in each case one of the parallel extending in the longitudinal direction of the bottom rails 15. Each of the two

Top rails 17 forms each with the associated bottom rail 15 a

Pair of seat rails. The longitudinal adjuster thus comprises two parallel seat rail pairs. By means of a locking device, each of the two upper rails 17 with the respective lower rail 15 can be locked. By means of a Entriegelungsbügels 21, the locking device can be unlocked. Alternatively, an electric drive is also conceivable here.

The longitudinal direction is perpendicular to the transverse direction, but present slightly inclined relative to the direction of travel, and thus also approximately perpendicular to the vertical direction. The vehicle seat 1 is adjustable by means of a height adjuster 5 in height. The height adjuster 5 of the vehicle seat 1 has in this case on both

Vehicle seat sides depending on a four-bar, which is formed from a base 3, a front rocker 7, a rear rocker 9 and a side part 1 1, which are each connected by means of articulation points.

The two side parts 1 1 are part of the seat frame 10, which as a

Foam part formed seat cushion 12 and in the present case, the backrest 14 carries. The backrest 14 is formed with a foam part

Padded backrest cushion 6 and is, as well as the seat cushion 12, covered with a cover, in particular made of fabric or leather. The seat cushion 12 and the backrest cushion 6 significantly increase the seating comfort for an occupant of the vehicle seat. 1

Each base 3 of the two four joints of the height adjuster 5 is presently connected to one of the two seat rail pairs, which are part of the longitudinal adjuster, and which are fastened by means of the respective lower rail 15 to the vehicle floor of the motor vehicle. Each base 3 is connected to the respective upper rail 17 of a pair of seat rails or formed integrally with the respective upper rail 17 of the longitudinal adjuster. In the present case, the respective upper rail 17 forms the base 3 of the height adjuster 5. Alternatively, the base 3 may also be fastened directly to the vehicle floor, or the vehicle floor may form the base 3. By means of the height adjuster 5, the height of the seat part 2 and thus also of the seat cushion 12 and present at the same time the backrest 14 of the vehicle seat 1 above the vehicle floor and thus also over the base 3 is adjustable. To drive the height adjuster 5 is presently a manually operated

Lever drive provided. Alternatively, an electric drive for the height adjuster 5 is conceivable.

On each side part 1 1, a first articulation point 22 is provided in the front region, on which the front rocker 7 is pivotally mounted. The

Base 3 comprises in the front region a front adapter 16 to which the front rocker 7 is also pivotally mounted at a second articulation point 24. On each side part 1 1, a third articulation point 26 is provided in the rear region, on which the rear rocker 9 is pivotally mounted.

Likewise, the base 3 in the rear region comprises a rear adapter 18, on which the rear rocker 9 is also pivotally mounted at a fourth articulation point 28.

The articulation points 22, 24, 26, 28 are joints of the four joints of the

Height adjuster 5. The center axes of the articulation points 22, 24, 26, 28, about which the rockers 7, 9 can pivot relative to the base 3 and to the side part 1 1, parallel to each other in the transverse direction.

In the present case, the articulation points 22, 24, 26, 28 each comprise a screw bolt which projects through a corresponding bore in the rockers 7, 9. Each of the said bolts is screwed into a thread, which is provided on the side part 1 1, or on one of the adapters 16, 18 of the base 3.

The seat frame 10 includes in addition to the two side parts 1 1 and a cross tube 53 and a crossbeam 54. The cross tube 53 is in the transverse direction

extending in a rear direction in the direction of travel of the side parts 1 1 arranged and attached to this. The cross-beam 54 is relative to the

Side parts 1 1 movable.

At the right in the direction of travel side part 1 1 present a bearing arm 46 is pivotally mounted about a pivot axis 58 extending in the transverse direction. At the left side part 1 1 in the direction of travel, an adjusting arm 40 is pivotally mounted about the pivot axis 58 in the present case. In the present case, the central axis of the first articulation point 22 of the height adjuster 5, about which the front rocker 7 pivots relative to the side part 11, is also located on the pivot axis 58.

Between the pivot axis 58 facing away from the ends of the adjusting arm 40 and the bearing arm 46 has a transversely extending cross member 54 is attached. The adjusting arm 40, the bearing arm 46 and the cross-beam 54 are part of a tilt adjuster 30, by means of which the inclination of the seat cushion 12 relative to the seat frame 10 is adjustable.

The seat frame 10 carries a seat 50, on which the seat cushion 12 rests. Thus, the seat frame 10 supports the seat cushion 12 indirectly. The seat shell 50 is pivotally connected to the side parts 1 1 in a rear region in the direction of travel about a respective bearing point 52. In a front region in the direction of travel, the seat shell 50 rests on the crosspiece 54.

In a pivoting movement of the adjusting arm 40 and the bearing arm 46 relative to the side parts 1 1 about the pivot axis 58, the cross-beam 54 moves predominantly in the vertical direction. By such a change in height of

Crossbar 54 relative to the side parts 1 1, the seat 50 is raised together with the seat cushion 12 in the front region, or lowered, and thereby the inclination of the seat cushion 12 is changed. At the bottom of the seat 50, two headband 56 are fixed, which are penetrated by the cross-beam 54. The headband 56 serve one

positive locking of the seat 50 on the cross-beam 54 and allow at the same time a length compensation between the cross-beam 54 and the seat 50 in the longitudinal direction.

The inclination adjuster 30 also includes a drive device 31 attached to the adjustment arm 40. The drive device 31 is present as

Stepping gear executed. Structure and function of such

Stepping gear are described for example in DE 10 2009 014 376 B3, the relevant disclosure of which is expressly incorporated. The drive device 31 is arranged between the two side parts 1 1 of the seat frame 10.

To drive the drive device 31, this comprises a drive lever 36, which in the present case is a drive axis extending in the transverse direction

is pivotable. The output of the drive device 31 forms a

externally toothed pinion 32, which in the present case is rotatable about a transverse output axis extending in the transverse direction.

The drive lever 36 protrudes, in the vertical direction below the seat cushion 12 and below the seat shell 50, in the direction of travel forward and is thus easily accessible to an occupant of the vehicle seat. By panning the

Driving lever 36 from an initial position upward, the pinion 32 undergoes a rotation in one direction, which is referred to as the upward direction. When pivoting back of the drive lever 36 in the initial position, the pinion 32 remains in its current position.

By pivoting the driving lever 36 from an initial position downward, the pinion 32 undergoes a rotation in a direction which will be referred to as a downward direction. When pivoting back of the drive lever 36 in the initial position, the pinion 32 remains in its current position.

The inclination adjuster 30 further comprises a guide element 44, which in the present case on the left in the direction of travel side part 1 1 of the seat frame 10th is appropriate. The guide element 44 has a toothed part 42, which forms an edge of an introduced into the guide member 44 elongated hole. The teeth of the tooth part 42 lie on a circular path whose center lies on the pivot axis 58. The tooth part 42 is thus slightly concave. The teeth of the tooth part 42 are arranged approximately in the vertical direction one above the other.

The tooth part 42 is engaged with the pinion 32. The pinion 32 extends through the introduced in the guide member 44 slot. A lock washer 33, which is fastened to an end face of the pinion 32 remote from the drive device 31, prevents the pinion 32 from moving out of the lock washer

Slot of the guide member 44 in the transverse direction, in particular in the event of a crash. The diameter of the lock washer 33 is greater than the width of the

Long hole of the guide member 44 and in this case also larger than that

Outer diameter of the pinion 32.

By a rotation of the pinion 32 generated by the drive means 31, the pinion 32 moves along the tooth part 42 within the oblong hole of the guide member 44. When the pinion 32 rotates in the upward direction, the pinion 32 moves vertically upward. When the pinion 32 rotates in the downward direction, the pinion 32 moves vertically downward.

By the described movement of the pinion 32 relative to the tooth part 42 of the adjusting arm 40 pivots relative to the side part 1 1 about the pivot axis

58. The adjusting arm 40 takes the cross-member 54 in the vertical direction and the cross-beam 54 takes the bearing arm 46, which then a

Pivoting movement about the pivot axis 58 performs. By this movement of the cross-beam 54 relative to the side parts 1 1, as already described, the inclination of the seat cushion 12 is changed. The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in combination for the realization of the invention in its various forms.

LIST OF REFERENCE NUMBERS

vehicle seat

seat part

Base

Height adjuster

Backrest cushion

front swingarm

rear swingarm

seat frame

side panel

seat cushions

headrest

backrest

bottom rail

front adapter

upper rail

rear adapter

Lehneneinstellbeschlag

Entriegelungsbügel

first articulation point

second articulation point

third articulation point

fourth articulation point

Tilt adjuster

driving means

pinion

lock washer

drive lever Adjusting arm tooth part

Guide element bearing arm

Seat shell bearing point cross tube

Cross-beam headband swivel axis

Claims

claims

1 . Tilt adjuster (30) for a seat (10) with two side parts (1 1) having vehicle seat (1), comprising

a drive device (31), by means of which a cross-member (54) is movable relative to the side parts (1 1), and

a pivoting about a pivot axis (58) adjusting arm (40), wherein the cross-beam (54) in a pivot axis (58) facing away from the adjustment arm (40) is connected thereto,

characterized in that

the drive device (31) is arranged on the adjustment arm (40) and between the two side parts (11) of the seat frame (10),

and in that the drive device (31) comprises a pinion (32) which engages with a toothed part (42) arranged on a side part (11).

2. tilt adjuster (30) according to claim 1, characterized in that the drive means (31) from the pivot axis (58) spaced from the adjusting arm (40) is arranged.

3. tilt adjuster (30) according to any one of the preceding claims, characterized in that the drive means (31) near the cross-member (54) on the adjusting arm (40) is arranged.

4. tilt adjuster (30) according to any one of the preceding claims, characterized in that the drive means (31) is designed as a stepping gear.

5. tilt adjuster (30) according to any one of the preceding claims, characterized in that the drive device (31) has a drive lever (36) which projects in the direction of travel forward.

6. tilt adjuster (30) according to any one of the preceding claims, characterized in that the toothed part (42) has an edge of a in one

Guiding element (44) introduced slot.

7. tilt adjuster (30) according to claim 6, characterized in that the toothed part (42) is concave.

8. tilt adjuster (30) according to any one of claims 6 to 7, characterized

characterized in that the tooth part (42) has teeth which are arranged on a circular path.

9. tilt adjuster (30) according to claim 8, characterized in that the center of the circular path on the pivot axis (58).

10. tilt adjuster (30) according to any one of claims 6 to 9, characterized

in that the guide element (44) is arranged between the two side parts (11) of the seat frame (10).

1 1. An inclination adjuster (30) according to any one of claims 6 to 10, characterized

characterized in that at one end face of the pinion (32) has a

Locking washer (33) is arranged, whose diameter is greater than the width of the elongated hole of the guide element (44).

12. tilt adjuster (30) according to any one of the preceding claims, characterized in that the pinion (32) is rotatable about an axis of rotation which is parallel to the pivot axis (58).

13. tilt adjuster (30) according to any one of the preceding claims, characterized in that the cross-beam (54) with a bearing arm (46) is connected, which is pivotally mounted about the pivot axis (58).

14. Vehicle seat (1) comprising at least one inclination adjuster (30) according to one of the preceding claims.

15. Vehicle seat (1) according to claim 14, comprising a height adjuster (5), characterized in that the central axis of a pivot point (22) of the height adjuster (5) about which a rocker (7) relative to the side part (1 1) pivots , lies on the pivot axis (58).