DE102014202086B3 - 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) pivotally mounted relative to two coupling (3, 11) about a respective articulation point (22, 24, 26, 28) is, and a catching device, which in the rocker (7, 9) provided slot-shaped recess (36) and on the first coupling (11) arranged, the recess (36) protruding securing element (30). At the second coupling (3) a catch element (55) with a catch contour (57) is arranged, which cooperates with the securing element (30). The invention also relates to a vehicle seat (1), which comprises at least one height adjuster (5) according to the invention.

Description

The invention relates to a height 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 10.

State of the art

From the WO 2013/131813 A1 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. If the geared fitting is driven by means of a manual or electric drive device, it pivots two of the gearbox elements relative to one another. By this pivoting movement, the distance of the seat frame changes over the base and thus the height of the vehicle seat.

To increase the strength of the height adjuster in the event of a crash, a catching device is provided, which comprises an opening provided in the rocker slot-shaped recess and arranged on the seat frame, the recess protruding security element.

A similar height adjuster is from the JP 2010-052452 A known.

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, in particular to further increase the strength of the height adjuster in the event of a crash.

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.

A generic height adjuster for a vehicle seat comprises at least one rocker, which is pivotally mounted relative to two couplings about each pivot point, and a catching device, which includes an opening provided in the rocker slot-shaped recess and arranged on the first coupling, the recess protruding security element.

According to the invention a catch element is arranged with a catch contour on the second coupling, which cooperates with the securing element in the event of a crash.

As a result, the strength of the height adjuster is further increased in the event of a crash.

The height adjuster is advantageously designed so that the securing element is normally spaced from the catch element and arrives in the event of a crash in contact with the catch element. Thus, the fuse element does not hinder a height adjustment of the vehicle seat in the normal case. The normal case is the case of the usual operation of the vehicle seat and the vehicle. In the event of a crash, the vehicle and the vehicle seat experience a deformation.

According to an advantageous embodiment of the invention, the catch contour is designed such that normally the distance of the securing element remains the same to the catch contour at each height adjustment of the height adjuster.

Preferably, the securing element is configured at least approximately rotationally symmetrical to an axis of symmetry defining an axial direction and has a connection region, which is normally arranged at a distance perpendicular to the axial direction from the catching contour. In particular, the connection region of the securing element is preferably designed rotationally symmetrical to the axis of symmetry.

According to an advantageous embodiment of the invention, the securing element has a flange-like extension, wherein the catching contour is arranged in the axial direction between the rocker and the flange-like extension. The flange-like extension of the securing element is preferably designed rotationally symmetrical to the axis of symmetry.

In this case, the distance of the connection region from the catch contour in a direction perpendicular to the axial direction is preferably smaller than that Difference between the radius of the flange extension and the radius of the connection area.

According to an advantageous embodiment of the invention, the securing element has a flange projecting in the radial direction, which is arranged in the axial direction between the rocker and the catching contour. Also, the flange of the securing element is preferably designed rotationally symmetrical to the axis of symmetry.

In this case, the distance of the connection region from the catch contour in a direction perpendicular to the axial direction is preferably smaller than the difference between the radius of the flange and the radius of the connection region.

Preferably, the securing element is rotatably connected to the first coupling, in particular screwed, riveted or welded. It is also conceivable that the securing element is designed in one piece with the first coupling.

This object is also achieved by a vehicle seat with the features mentioned in claim 10, which has at least one height adjuster according to the invention.

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 drawings. However, the invention is not limited to this embodiment. Show it:

1 : a schematic representation of a vehicle seat,

2 a side view of a height adjuster of the vehicle seat,

3 : a perspective view of the height adjuster 2 .

4 : another perspective view of the height adjuster 2 .

5 : a 3D section of the height adjuster 2 .

6 : a sectional view of the height adjuster 2 and

7 : a top view of the height adjuster off 2 ,

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 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 forms a second coupling of the four-bar link, and the side panel 11 forms a first coupling of the four-jointed joint.

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 pivotally 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 pivotally mounted. At the side part 11 is in the rear area a third pivot point 26 provided on which the rear rocker 9 is pivotally 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 pivotally 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 arranged.

At the front swingarm 7 a catching device is arranged. This is indicated by the front swingarm 7 a recess 36 on, through which one on the side part 11 attached fuse element 30 protrudes. The fuse element 30 is rotationally symmetrical to a symmetry axis S executed and has an approximately circular cylindrical designed body 34 on. The symmetry axis S defines an axial direction and runs parallel to the center axes of the articulation points 22 . 24 . 26 . 28 , In the present case, the axial direction thus extends in the transverse direction.

The fuse element 30 has a screw thread area 32 on, which in one on the side part 11 attached welding nut 38 is screwed. The fuse element 30 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 fuse element 30 is rotatable with the side part 11 connected.

It is also conceivable that the fuse 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. The fuse element 30 can also with the side part 11 riveted.

The drive device 20 Acts here with the rear swingarm 9 together, while the catcher present with the front rocker 7 works together. Thus, the drive device act 20 and the catcher with different wings 7 . 9 together.

The welding nut 38 in this case comprises an internal thread for receiving the Schraubgewindebereichs 32 of the fuse element 30 , 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 fuse element 30 rotatably with the side part 11 connected.

The recess 36 has the shape of a long hole in the form of a circular arc. The width the recess 36 is slightly larger than the diameter of the body 34 of the fuse element 30 , The radius of this circular arc corresponds to the distance of the central axis of the first articulation point 22 to the symmetry axis (S) of the fuse element 30 ,

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 fuse element 30 has a flange 33 on, whose diameter is greater than the width of the recess 36 , in the present case about three times as large. The flange 33 is in the axial direction at a Schraubgewindebereich 32 opposite end of the body 34 arranged and is in the radial direction of the main body 34 from. The flange 33 is thus on the side panel 11 opposite side of the front swingarm 7 arranged.

On the body 34 opposite side of the flange 33 has the fuse element 30 a connection area 35 on. The connection area 35 is designed approximately hollow cylindrical and has an internal thread. The outer diameter of the connection area 35 corresponds approximately to the diameter of the body 34 ,

Into the internal thread of the connection area 35 is a catch screw 50 eigedreht. The catch screw 50 includes a head 52 whose diameter is approximately equal to the diameter of the flange 33 of the fuse element 30 equivalent. The connection area 35 of the fuse element 30 is thus located between the flange 33 and the head 52 the catch screw 50 ,

Instead of the catch screw 50 , which in the internal thread of the connection area 35 is screwed in, is also another element on the connection area 35 attachable, which has a flange-like extension, similar to the head 52 the catch screw 50 , For example, a flat disc is at the flange 33 remote end face of the connection area 35 fastened, preferably by welding. Furthermore, a flange-like extension to the flange 33 remote end face of the connection area 35 integral with the securing element 30 be executed.

On the front adapter 16 and thus stationary in relation to the upper rail 17 as well as in terms of the base 3 is a catch element 55 appropriate. The catch element 55 is formed in the form of a flat sheet and on the front adapter 16 attached, welded here. It is also conceivable that the catch element 55 integral with the front adapter 16 is trained.

The catch element 55 extends flat perpendicular to the transverse direction and has a catch contour 57 on. The catch contour 57 is a border area of the catchment 55 , which is oriented parallel to the transverse direction. The catch contour 57 is arcuate and inclined to the vertical direction and inclined to the longitudinal direction. The catch contour 57 limits the catch element 55 in the vertical direction upwards and in the longitudinal direction to the rear.

It is also conceivable that the catch element 55 further extends in the vertical direction upwards and in the longitudinal direction to the rear as shown in the present embodiment. The catch element 55 in this case comprises an opening, in particular in the form of an arcuate slot. The catch contour 57 forms the edge contour of the opening in the catch element 55 ,

In the present embodiment, the catch contour 57 of the catchment 55 as well as the connection area 35 of the fuse element 30 one smooth surface each. It is conceivable that the surfaces of the catching contour 57 and / or the connection area 35 roughened or formed with a toothing. As a result, higher forces from the securing element can in the event of a crash 30 on the catch element 55 be transmitted and the strength of the height adjuster is further increased.

Seen in the transverse direction is the catch contour 57 of the catchment 55 between the flange 33 of the fuse element 30 and the head 52 the catch screw 50 , The connection area 35 of the fuse element 30 is in the vertical direction and in the longitudinal direction of the catch contour 57 spaced. The catch contour 57 is geometrically designed such that the distance of the connection area 35 to the catch contour 57 at every possible height adjustment of the height adjuster 5 stays the same.

On the front adapter 16 is also a side plate 59 provided, which is flat parallel to the catch element 55 extends. The side plate 59 is offset transversely to the catch element 55 arranged, wherein, seen in the transverse direction, the head 52 the catch screw 50 between the catch element 55 and the side plate 59 located. In the present case is the side plate 59 integral with the front adapter 16 educated. The side plate 59 but can also be a separate part, which with the front adapter 16 connected, preferably welded.

The distance of the connection area 35 to the catch contour 57 is smaller than the difference from the radius of the head 52 the catch screw 50 and the radius of the connection area 35 , The distance of the connection area 35 to the catch contour 57 is also smaller than the difference from the radius of the flange 33 and the radius of the connection area 35 , The catch contour 57 protrudes into one of the flange 33 , the connection area 35 and the head 52 the catch screw 50 inside the room.

The catching device has a stabilizing effect on the front rocker 7 , Under crash load, especially in a side crash, the flange passes 33 of the fuse element 30 in plant the front swingarm 7 and in particular reduces deformation of the front rocker 7 in the transverse direction, but also in the longitudinal direction and in the vertical direction.

Additionally comes under Crashlast, especially in a side crash, the head 52 the catch screw 50 laterally in contact with the catch element 55 and thereby also prevents deformation of the rocker 7 in the transverse direction.

Under Crashlast, especially in a frontal crash, enters the connection area 35 of the fuse element 30 in contact with the catch contour 57 of the catchment 55 and thereby prevents deformation of the rocker 7 in the longitudinal direction and in the vertical direction.

LIST OF REFERENCE NUMBERS

1

 vehicle seat

2

 seat part

3

 Base (second paddock)

5

 Height adjuster

6

 Backrest cushion

7

 front swingarm

9

 rear swingarm

10

 seat frame

11

 Side panel (first paddock)

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

 fuse element

32

 screw threaded

33

 flange

34

 body

35

 terminal area

36

 recess

38

 weld nut

50

 capture screw

52

 head

55

 catching element

57

 Fang contour

59

 Page sheet

S

 axis of symmetry

Claims (10)

Height adjuster ( 5 ) for a vehicle seat ( 1 ), comprising at least one rocker ( 7 . 9 ), which are relative to two couplers ( 3 . 11 ) by a respective Anlenkstelle ( 22 . 24 . 26 . 28 ) is pivotally mounted, and a catching device, which one in the rocker ( 7 . 9 ) provided slot-shaped recess ( 36 ) and one at the first paddock ( 11 ), the recess ( 36 ) projecting fuse element ( 30 ), characterized in that at the second coupling ( 3 ) a catch element ( 55 ) with a catch contour ( 57 ) is arranged, which with the securing element ( 30 ) cooperates. Height adjuster ( 5 ) according to claim 1, characterized in that the securing element ( 30 ) in the normal case of the catch element ( 55 ) is spaced and in the event of a crash in contact with the catch element ( 55 ). Height adjuster ( 5 ) according to claim 2, characterized in that the catch contour ( 57 ) is configured such that normally the distance of the securing element ( 30 ) to the catching contour ( 57 ) at each height adjustment of the height adjuster ( 5 ) remains the same. Height adjuster ( 5 ) according to one of the preceding claims, characterized in that the securing element ( 30 ) is configured at least approximately rotationally symmetrical to an axis of symmetry (S) defining an axial direction and has a connection region ( 35 ), which is normally perpendicular to the axial direction of the catch contour ( 57 ) is arranged at a distance. Height adjuster ( 5 ) according to one of the preceding claims, characterized in that the securing element ( 30 ) a flange-like extension ( 52 ), wherein the catch contour ( 57 ) in the axial direction between the rocker ( 7 . 9 ) and the flange-like extension ( 52 ) is arranged. Height adjuster ( 5 ) according to claims 4 and 5, characterized in that the distance of the connection area ( 35 ) to the catching contour ( 57 ) perpendicular to the axial direction is smaller than the difference between the radius of the flange-like extension ( 52 ) and the radius of the connection area ( 35 ). Height adjuster ( 5 ) according to one of the preceding claims, characterized in that the securing element ( 30 ) a radially projecting flange ( 33 ), which in the axial direction between the rocker ( 7 . 9 ) and the catch contour ( 57 ) is arranged. Height adjuster ( 5 ) according to claims 4 and 7, characterized in that the distance of the connection area ( 35 ) to the catching contour ( 57 ) perpendicular to the axial direction is smaller than the difference between the radius of the flange ( 33 ) and the radius of the connection area ( 35 ). Height adjuster ( 5 ) according to one of the preceding claims, characterized in that the securing element ( 30 ) rotatably with the first coupling ( 11 ) connected is. Vehicle seat ( 1 ) comprising at least one height adjuster ( 5 ) according to any one of the preceding claims.

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