DE102012013174A1 - Height adjuster for a vehicle seat and vehicle seat - Google Patents

Abstract

The invention relates to a height adjuster (5) for a vehicle seat (1), comprising at least one rocker (7, 9) which is rotatable relative to a coupling about an articulation point (22, 24, 26, 28). The articulation point (22, 24, 26, 28) is associated with a catching device (40), which is designed as a link control.

Description

The invention relates to a height adjuster for a vehicle seat having the features of the preamble of claim 1. The invention also relates to a vehicle seat having the features of claim 8.

State of the art

From the DE 10 2009 014 376 B3 are a generic height adjuster and a generic vehicle seat known. The height adjuster has on each side of the vehicle seat depending on a four-bar linkage, wherein each four-bar link of a base, a front rocker, a rear rocker and a seat frame is formed. The gear members, so the base, the front rocker, the rear rocker and the seat frame are connected by means of joints.

The height adjuster is manually drivable for height adjustment by means of a gear shifter and a drive device. If the transmission fitting is driven by the drive means, it pivots two of the gear members relative to each other. By this pivoting movement, the distance of the seat frame changes over the base and thus the height of the vehicle seat.

In the event of a crash, in particular during a side crash, the rockers may experience a deformation or a change in position. This deformation or change of position can take place in all spatial directions and is relatively difficult to control.

From the DE 199 44 866 B4 is also a generic height adjuster known. In order to stabilize the height adjuster in the event of a crash, a disk is slipped onto the drive shaft of the height adjuster arranged on the seat frame and held by a nut which cooperates with a support part provided on the rocker in the event of a crash.

task

The invention is based on the object to improve a height adjuster of the type mentioned above, in particular to reduce a deformation and a change in position of the wings of the height adjuster with a simple structure.

solution

This object is achieved by a height adjuster with the features mentioned in claim 1. Advantageous embodiments, which can be used individually or in combination with each other, are the subject of the dependent claims.

Accordingly, a height adjuster according to the invention for a vehicle seat comprises at least one rocker, which is rotatable relative to a coupling about an articulation point, wherein the articulation point is associated with a catching device. The catching device comprises a slot-shaped recess provided in the rocker and a guide element arranged on the coupling and protruding through the recess. The guide element is rotatably connected to the coupling.

The fact that the guide element is rotatably connected to the coupling, the strength of the height adjuster is increased, whereby an uncontrollable change in position of the rocker is reduced relative to the coupling, in particular under crash load. At the same time a movement for height adjustment is not hindered or impeded by the capturing device. Furthermore, this allows a relatively simple construction of the catching device.

Advantageously, the recess in this case only smooth edge areas. This means, in particular, that no toothing is provided on any of the edge regions. The smooth edge regions ensure that the guide element does not catch on to this edge region even when touching such an edge region when adjusting the height.

Preferably, the recess is formed in the form of a circle segment, since thereby the rotational movement of the rocker is not hindered relative to the coupling.

The radius of the circular segment corresponds advantageously to the distance of the central axis of the articulation point to the central axis of the guide element.

The guide element advantageously comprises a screw and is therefore relatively easy to install.

In this case, the screw advantageously comprises a shaft with a distal region, which has an external thread, and with a proximal region, which has a cylindrical contour without thread. The length of the distal area thus specifies the possible depth of engagement and prevents the screw from being screwed in too far during assembly.

According to an advantageous embodiment of the invention, the screw is screwed into a welding nut. The weld nut points to it the external thread of the screw matching internal thread.

According to an alternative embodiment of the invention, the screw is screwed into a collar, which has a matching to the external thread of the screw internal thread.

This object is also achieved by a vehicle seat with the features mentioned in claim 8, which has at least one height adjuster according to the invention.

The height adjuster of the vehicle seat preferably has a four-bar linkage or a scissors frame.

Figures and embodiments of the invention

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

1 : a schematic representation of a vehicle seat and

2 : A perspective view of a capture device.

A vehicle seat 1 for a motor vehicle has a seat part 2 which is a seat frame 10 includes, and an attached, tilt-adjustable backrest 14 on.

The arrangement of the vehicle seat 1 Within the vehicle and its usual direction of travel define the directional information used below. In this case, a direction oriented perpendicular to the ground is referred to below as the vertical direction and a direction perpendicular to the vertical direction and perpendicular to the direction of travel is referred to below as the transverse direction.

By means of a laterally arranged, manually operated Lehneneinstellbeschlags 19 is the backrest 14 tilt adjustable, that means the angle between the seat part 2 and the backrest 14 is adjustable. Alternatively, an electric drive is conceivable.

At the vertically upper end of the backrest 14 which is the seat part 2 is remote, is also a height adjustable and tilt adjustable headrest 13 appropriate.

By means of a Längseinstellers, which two connected to the vehicle floor of the motor vehicle Unterschienen 15 as well as two with the vehicle seat 1 connected top rails 17 has, is the vehicle seat 1 along adjustable. That means the seat part 2 is together with the backrest 14 in the longitudinal direction, which corresponds approximately to the direction of travel, adjustable. This is each of the top rails 17 in each case one of the parallel longitudinally extending lower rails 15 slidably guided. Each of the two top rails 17 forms each with the associated lower rail 15 a seat rail pair. The longitudinal adjuster thus comprises two parallel seat rail pairs.

By means of a locking device, each of the two upper rails with the respective lower rail 15 lockable. By means of an unlocking bracket 21 the locking device is unlocked. Alternatively, an electric drive is also conceivable here.

The longitudinal direction is perpendicular to the transverse direction, but in the present case slightly inclined relative to the direction of travel, and thus also approximately perpendicular to the vertical direction.

The vehicle seat 1 is by means of a height adjuster 5 adjustable 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 linkage, which consists of a base 3 , a front swingarm 7 , a rear swingarm 9 and a side part 11 is formed, which are connected to each other by means of joints. The base 3 and the side part 11 each form a coupling of the four-bar linkage.

The side parts 11 are part of the seat frame 10 , which is designed as a foam part seat cushion 12 and in the present case also the backrest 14 wearing. Also the backrest 14 is with a trained as a foam part backrest cushion 6 upholstered and is, as well as the seat cushion 12 covered with a cover. The seat cushion 12 and the foam part of the backrest 10 significantly increase the seating comfort for an occupant of the vehicle seat 1 ,

Every base 3 the two four-links of the height adjuster 5 is in this case connected to one of the two pairs of seat rails, which are part of the longitudinal adjuster, and which by means of the respective lower rail 15 are attached to the vehicle floor of the motor vehicle. There is every basis 3 with the respective upper rail 17 a seat rail pair connected. There is every basis here 3 of the height adjuster 5 integral with the respective upper rail 17 formed of the longitudinal adjuster. Alternatively, the base 3 also be attached directly to the vehicle floor.

By means of the height adjuster 5 is the height of the seat part 2 and thus also 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 above the base 3 adjustable. To drive the height adjuster 5 is presently a manually operated drive device 20 intended. Such a drive device for a height adjuster of a vehicle seat is for example in the document DE 10 2009 014 376 B3 described, the related disclosure of which is expressly incorporated. Alternatively, an electric drive for the height adjuster 5 conceivable.

At the side part 11 is in the front area a first articulation point 22 provided, on which the front rocker 7 is rotatably mounted. The base 3 includes in the front area a front adapter 16 at which the front swingarm 7 at a second point of articulation 24 is also rotatably mounted. At the side part 11 is in the rear area a third pivot point 26 provided on which the rear rocker 9 is rotatably mounted. Likewise, the base includes 3 in the rear area a rear adapter 18 at which the rear swingarm 9 at a fourth point of articulation 28 is also rotatably mounted.

The articulation points 22 . 24 . 26 . 28 are joints of the four-link of the height adjuster 5 , The center axes of the articulation points 22 . 24 . 26 . 28 around which the wings swing 7 . 9 relative to the base 3 as well as to the side part 11 can pivot, parallel to each other in the transverse direction.

The articulation points 22 . 24 . 26 . 28 in the present case each comprise a screw bolt, which has a corresponding hole in the rocker arms 7 . 9 projects through. Each of the said bolts is screwed into a thread which on the side part 11 , or on one of the adapters 16 . 18 the base 3 is provided.

The first articulation point 22 is a catching device 40 assigned, which is designed similar to a slotted guide or slide control. This is indicated by the front swingarm 7 a recess 36 on, through which one on the side part 11 attached guide element 30 protrudes. The guide element 30 in this case comprises a screw 32 , which in one on the side part 11 attached welding nut 38 is screwed. The screw 32 is with a relatively high moment in the weld nut 38 screwed and thus, in particular due to frictional forces on the weld nut 38 secured and secured. That means the screw 32 is rotatable with the side part 11 connected.

It is also conceivable that the guide element 30 is designed as a bolt, which on the side part 11 is welded. The bolt is also rotatable with the side part in this case 11 connected.

In the present case is the drive device 20 the third point of articulation 26 assigned while the catching device 40 in this case, the first articulation point 22 assigned. Thus, the drive device 20 and the catcher 40 different articulation points 22 . 26 assigned. The drive device 20 Acts here with the rear swingarm 9 together while the catching device 40 in this case with the front rocker 7 works together. Thus, the drive device act 20 and the catcher 40 with different wings 7 . 9 together.

The welding nut 38 In the present case, it comprises an internal thread for receiving a corresponding external thread of a shaft 34 the screw 32 , The welding nut 38 is on the side panel 11 welded. It is also conceivable that in the side panel 11 directly a corresponding internal thread is introduced. In particular, the side part 11 have a collar, which is equipped with an internal thread. Also in this case is the screw 32 rotatably with the side part 11 connected.

The recess 36 has the shape of a slot in the form of a circle segment with a diameter of the shaft 34 the screw 32 approximately corresponding width. The radius of this circle segment corresponds to the distance of the central axis of the first articulation point 22 to the central axis of the screw 32 , The screw 32 has a head 33 on, whose diameter is greater than the width of the recess 36 , in the present case about three times as large. The central axis of the screw 32 also runs in the transverse direction.

The edge regions of the recess 36 , So the surfaces which are oriented parallel to the transverse direction, in the present case are smooth. In particular, is at the said edge regions of the recess 36 no gearing provided.

The shaft 34 the screw 32 includes a distal portion having the aforementioned external thread. Furthermore, the shaft comprises 34 the screw 32 a proximal portion having a cylindrical non-threaded contour. The proximal part of the shaft 34 the screw 32 lies in the axial direction between the distal portion of the shaft 34 and the head 33 the screw 32 ,

The length of the proximal portion of the shaft 34 the screw 32 , So its expansion in the axial direction, approximately corresponds to Thickness of the front swingarm 7 near the recess 36 , ie their extension in the transverse direction. When assembling the screw 32 until it stops in the weld nut 38 screwed. Thereafter, the external thread of the distal portion of the shaft is located 34 completely in the internal thread of the weld nut 38 ,

The proximal part of the shaft 34 remains outside the welding nut 38 and thereby gives the distance of the head 33 the screw 32 to the welding nut 38 in front. The proximal part of the shaft 34 thus penetrates the recess 36 in the front swingarm 7 which thus transversely between the head 33 the screw 32 and the welding nut 38 is located.

In the present case, the front swingarm points 7 the slot 36 on and the guide element 30 is on the side panel 11 attached. Of course, this arrangement is also reversible, in which case the side part 11 has a slot through which a then on the front rocker 7 attached guide member protrudes.

The catcher 40 has a stabilizing effect on the front swingarm 7 , Especially under crash load, the guide element acts 30 as a catch element and reduces deformation of the front rocker 7 , The head of the screw 32 in particular reduces deformation of the front rocker 7 in the transverse direction, but also in the longitudinal direction and in the vertical direction.

Alternatively or in addition to that at the first point of articulation 22 provided catching device 40 Such a catching device is also the second point of articulation 24 , the third articulation point 26 as well as fourth articulation point 28 assignable.

The height adjuster 5 may also comprise a scissors-type frame, which comprises a sub-frame, a top frame arranged above the same and a pair of crossed first wings and second wings on both sides, wherein a transverse tube connects the two crossing points and defines a scissor axis about which the wings can pivot relative to each other. A vehicle seat with such a trained scissors frame is for example in the DE 10 2010 046 489 B3 described, the related disclosure of which is expressly incorporated.

In such a vehicle seat with a Scherengstell the respective articulation points of the wings on the side parts of the upper frame and the lower frame is also a catcher 40 assignable.

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

1

vehicle seat

2

seat part

3

Base

5

Height adjuster

6

Backrest cushion

7

front swingarm

9

rear swingarm

10

seat frame

11

side panel

12

seat cushions

13

headrest

14

backrest

15

bottom rail

16

front adapter

17

upper rail

18

rear adapter

19

Lehneneinstellbeschlag

20

driving means

21

Entriegelungsbügel

22

first articulation point

24

second articulation point

26

third articulation point

28

fourth articulation point

30

guide element

32

screw

33

head

34

shaft

36

recess

38

weld nut

40

catcher

QUOTES INCLUDE IN THE DESCRIPTION

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

Cited patent literature

• DE 102009014376 B3 [0002, 0032]
• DE 19944866 B4 [0005]
• DE 102010046489 B3 [0048]

Claims (10)

Height adjuster ( 5 ) for a vehicle seat ( 1 ), comprising at least one rocker ( 7 . 9 ), which are relative to a coupling ( 3 . 11 ) around an articulation point ( 22 . 24 . 26 . 28 ) is rotatable, wherein the pivot point ( 22 . 24 . 26 . 28 ) a catching device ( 40 ), which one in the rocker ( 7 . 9 ) provided slot-shaped recess ( 36 ) and one at the paddock ( 3 . 11 ), the recess ( 36 ) projecting guide element ( 30 ), characterized in that the guide element ( 30 ) rotatably with the coupling ( 3 . 11 ) connected is. Height adjuster ( 5 ) according to claim 1, characterized in that the recess ( 36 ) has only smooth edge areas. Height adjuster ( 5 ) according to one of the preceding claims, characterized in that the recess ( 36 ) is formed in the form of a circle segment. Height adjuster ( 5 ) according to one of the preceding claims, characterized in that the guide element ( 30 ) a screw ( 32 ). Height adjuster ( 5 ) according to claim 4, characterized in that the screw ( 32 ) a shaft ( 34 ) having a distal portion having an external thread and a proximal portion having a cylindrical non-threaded contour. Height adjuster ( 5 ) according to one of claims 4 or 5, characterized in that the screw ( 32 ) in a weld nut ( 38 ) is screwed. Height adjuster ( 5 ) according to one of claims 4 or 5, characterized in that the screw ( 32 ) is screwed into a collar. Vehicle seat ( 1 ) comprising at least one height adjuster ( 5 ) according to any one of the preceding claims. Vehicle seat ( 1 ) according to claim 8, characterized in that the height adjuster ( 5 ) has a four-bar linkage. Vehicle seat ( 1 ) according to claim 8, characterized in that the height adjuster ( 5 ) has a scissors rack.

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