DE102007026379A1 - Motor vehicle's seat has a backrest, a head-restraint linked to the backrest via supporting braces and an inflatable cushion surrounding the supporting braces - Google Patents

Abstract

An inflatable cushion (18) surrounds supporting braces (10,12) at the sides along its whole length and has continuous tubes (26,28), through which the supporting braces extend from a head-restraint (16) to a backrest (4). The inflatable cushion can be lengthened and shortened so that it is next to the backrest on one side and next to the head-restraint on the other side.

Description

The The present invention relates to a motor vehicle seat having a Backrest and a headrest, with the headrest over at least one support strut with the backrest connected is.

Out The prior art is a variety of motor vehicle seats known, consisting essentially of a seat part, one with the backrest connected to the seat part and one on the backrest assembled headrest, with the headrest to adapt to the size of the vehicle occupant is height adjustable relative to the backrest.

That's how it describes DE 198 06 535 C2 a motor vehicle seat, wherein the seat part and the backrest each comprise a padding and a plurality of arranged in the upholstery bubbles, which are filled with a fluid. To adjust seating comfort over the hardness of the seat and back, the bladders are connected to a fluid pressure adjustment system. In addition, a headrest is provided at the upwardly facing end of the backrest. The headrest can be adjusted in height via a linear actuator. How the headrest is connected to the backrest is not explained in detail.

Another motor vehicle seat with backrest and headrest is in the DE 299 24 138 U1 described. The known motor vehicle seat has a support strut which extends between the backrest on the one hand and the headrest on the other hand to support the headrest on the backrest and fasten. The struts are usually made of metal to maintain the necessary stability.

Another type of motor vehicle seat is from the DE 199 10 427 A1 known. This motor vehicle seat is composed of a seat frame, a base pad, which is arranged on the vehicle occupant side facing the seat frame, and a support of a plurality of interconnected vacuum pad together. The seat comfort can be increased by targeted evacuation of the support. The seat frame comprises the rear part of the backrest, a part of the headrest, which supports the base cushion and the support in the region of the head of the vehicle occupant from the rear, and the support strut arranged therebetween.

A similarly constructed motor vehicle seat is from the WO 01/13767 A1 known. Also, this motor vehicle seat is composed of a rigid seat shell and a cushion pad, wherein the seat shell comprises the rear part of the backrest, a part of the headrest, which supports the support in the region of the head of the vehicle occupant from behind, and the support strut arranged therebetween. The support has inflatable air cells, which are arranged inter alia on the vehicle occupant side facing the headrest and the support strut. The inflatable air cells should allow for an individual adjustment of the vehicle seat and increase the comfort of the seat by targeted control of the pressure in the air cells.

The known motor vehicle seats have the disadvantage that these no adequate protection against injury, especially in an accident, can guarantee.

It is therefore an object of the present invention, a motor vehicle seat with a backrest and a headrest too create that over at least one support strut is connected to a backrest, wherein the motor vehicle seat a safe protection of the vehicle occupants from injury, in particular in accidents, while maintaining a high level of comfort should ensure.

These The object is achieved by the features specified in claim 1 solved. Advantageous embodiments of the invention are the subject of the dependent claims.

Of the Motor vehicle seat according to the invention has a Backrest and a headrest on, with the Headrest with at least one support strut the backrest is connected. So, for example two metallic struts between the backrest and the headrest be provided. According to the invention further provided a ventilatable and / or inflatable cushion, which laterally encloses the at least one support strut. Under ventilated here is to understand that the possibility There is air to flow into or out of the pillow.

In the motor vehicle seat according to the invention, the support strut is laterally enclosed by the cushion and thus concealed on all sides. This has the advantage that not only the vehicle occupant seated on the motor vehicle seat, but also, for example, a vehicle occupant on a seat arranged behind it is protected from bumping with a body part against the sometimes hard support struts. This can protect against injury, especially in an accident or other critical driving situation, especially since the inflatable and / or ventilated cushion ensures a particularly soft support. In contrast, in the motor vehicle seats from the WO 01/13767 A1 and the DE 199 10 427 A1 only pillows provided on that side of the motor vehicle seat, which faces the user of this motor vehicle seat. The cushion of the invention Kraftfahr Thus, on the one hand seat allows increased comfort for the vehicle occupants sitting on the vehicle seat and on the other hand increased safety for all vehicle occupants.

In a preferred embodiment of the invention Motor vehicle seat, the cushion has at least one continuous Tube on which the support strut of the headrest extends to the backrest. The continuous tube, for example, from the wall of the Be formed cushion or a shell of the pillow. On this way the tube becomes equal in the production of the Pillow generated from a part of it.

at a height adjustment of the headrest opposite the backrest becomes the normally exposed section the struts extended or shortened. To ensure sufficient protection for this case To be able to, the headrest is in another preferred embodiment of the invention Motor vehicle seat height adjustable, the pillow in the extension direction of the at least one support strut can be extended and shortened. To this Way, the pillow can be adjusted to the height of the headrest be adjusted.

In a particularly preferred embodiment of the invention Motor vehicle seat, the pillow can be extended and be shortened that the pillow regardless of the height adjustment of the headrest on the one hand to the backrest and on the other hand to the headrest borders. The pillow is thus designed to be always the maximum possible length between the backrest on the one hand and headrest on the other hand.

Around to further enhance the aforementioned advantage is Cushion in a further particularly preferred embodiment of the motor vehicle seat according to the invention in such a way formed that the cushion, the at least one support strut encloses laterally along its entire length. This can be done, for example, by appropriate adaptation of the Pillow to the pillow facing sides of headrest and backrest can be achieved.

In an advantageous embodiment of the invention Motor vehicle seat, the cushion is removable on the motor vehicle seat arranged. This gives the vehicle owner a certain amount of leeway granted in the design of the vehicle seat. Thus, the vehicle owner can provide the originally intended Pillow through a pillow with a different design or other comfort features change.

According to one further advantageous embodiment of the invention Motor vehicle seat, the headrest is removable at the Backrest arranged, the pillow only after losing weight the headrest can be removed. An unintentional Solving the pillow in a dangerous situation is thus prevented, as long as the headrest still on the backrest is attached. For example, the headrest can be put together removed with the support struts from the backrest then remove the pillow.

In a particularly advantageous embodiment of the invention Motor vehicle seat, the cushion is designed such that it can be prolonged by aerating. The Extension therefore takes place automatically as soon as possible the pillow is ventilated. It does not need to add more energy become.

In a further particularly advantageous embodiment of the motor vehicle seat according to the invention the pillow is designed so that it ventilates and Compression can be shortened. So would have to the headrest only down towards the backrest be pressed to adjust the height of the headrest and a simultaneous length adjustment of the between the headrest and the backrest arranged cushion effect.

In a further particularly preferred embodiment of the The motor vehicle seat according to the invention has that Cushion a compressible foam filling with an initial shape, in which the cushion its maximum length has, wherein the foam filling is formed such that in the unloaded condition with ventilated air mat again assumes the initial form. So can the foam filling initially compressed by lowering the headrest become. This can be spoken of a stressed condition. If the headrest is later adjusted back up, so tries the foam filling, again their original Length to assume and widens in the longitudinal direction off to the support strut along its entire visible To cover length.

Around a particularly fast adaptation of the pillow to a modified one To allow head rest position or one Quick adjustment of the headrest with the help of the pillow To effect itself, is in a further advantageous embodiment of the Motor vehicle seat according to the invention a pump provided for inflating and / or evacuating the pad.

Thus, the cushion in a further advantageous embodiment of the force according to the invention Vehicle seat by pumping extendable and / or shortened by evacuation.

In a further preferred embodiment of the invention Motor vehicle seat, the headrest by the extension and / or shortening of the cushion höhenverstellt become. A separate height adjustment drive is thus not mandatory.

According to one further advantageous embodiment of the invention Motor vehicle seat is the cushion neither on the backrest still on the headrest or both on the backrest as also attached to the headrest. At the first alternative is thus at least a raising of the headrest with Help of the pillow easily possible and removability The pillow is also simplified. In the second alternative is both up and down the headrest with Help of the pillow simplifies, as the headrest of length change of the pillow must follow in both directions.

In a further advantageous embodiment of the invention Motor vehicle seat, the cushion has an air-tight shell with a closable opening for inflation and / or venting on. For example, in the opening a controllable valve may be arranged.

According to one further advantageous embodiment of the invention Motor vehicle seat, the pillow with the opening closed neither extended nor shortened. So would shortening an overpressure and lengthening counteract a negative pressure within the pad.

In a further advantageous embodiment of the invention Motor vehicle seat is a height adjustment for the headrest provided so with the pillow in Wirkverbindung stands that the pillow ventilated and / or inflated when the headrest is moved up, and vented and / or evacuated when the headrest is adjusted down. Through this interaction is always an adaptation of the cushion length to the respective headrest position guaranteed.

Around to prevent an extension or shortening if the height adjustment is not active, stands the height adjustment device for the headrest in a further advantageous embodiment of the invention Motor vehicle seat so in operative connection with the cushion that the closable opening is closed when the height adjustment device no height adjustment effected. An unintentional shortening of the pillow, without moving the headrest down, is thereby safely prevented.

In a further preferred embodiment of the invention Motor vehicle seat, the support strut is rigid. This does not exclude that the strut can be moved or moved, but retains the Support strut their shape or is stiff.

In a further particularly preferred embodiment of the The motor vehicle seat according to the invention has that Cushion on the vehicle occupant facing depression in the the neck of the vehicle occupant can be inserted. is.

The The invention will be described below with reference to exemplary embodiments with reference to the accompanying drawings explained. Show it:

1 a partial front view of the motor vehicle seat according to the invention in a first embodiment with the headrest in an upper position,

2 a plan view of the section line AA of 1 .

3 the motor vehicle seat of 1 with the headrest in a lower position,

4 a partial front view of the motor vehicle seat according to the invention in a second embodiment with the headrest in an upper position,

5 a plan view of the section line BB of 4 and

6 the motor vehicle seat of 4 with the headrest in a lower position.

The 1 to 3 show a first embodiment of the motor vehicle seat according to the invention 2 , The motor vehicle seat 2 has a backrest 4 on, from in 1 only the upper part is shown. In the upwards facing side 6 the backrest 4 are two mutually parallel recesses 8th provided, of which in 1 only one is cut free. The wells 8th serve as a guide for two mutually parallel rigid support struts 10 . 12 made of metal. The cross-sectionally round struts 10 . 12 extend on the one hand with its lower end in the wells 8th and can be in the longitudinal direction of the wells 8th be moved and on the other hand from the wells 8th out to the backrest 4 facing side 14 a headrest 16 on which the struts support 10 . 12 are fixed immovably. The headrest 16 is thus about the support struts 10 . 12 with the backrest 4 connected, wherein by the displaceability of the support struts 10 . 12 within the wells 8th a height adjustment of the headrest 16 opposite the backrest 4 is possible in principle.

Between the sides facing each other 6 and 14 the backrest 4 and the headrest 16 is a pillow 18 arranged. The pillow 18 includes an airtight shell 20 in which a chamber 22 is provided. In the chamber 22 is a squeezable foam filling formed as a continuous foam body 24 whose further characteristics will be explained in more detail later. The pillow 18 further comprises two continuous tubes 26 . 28 that from the shell 20 are formed. This is how the struts extend 10 . 12 from one side 30 of the pillow 18 that the lower side 14 the headrest 16 facing, through the continuous tubes 26 . 28 to the other side 32 of the pillow 18 , the upper side 6 the backrest 4 is facing to the depressions 8th to get. In this way, the pillow encloses 18 both the strut 10 as well as the strut 12 to the sides or laterally, as this particular in 2 you can see. By this shielding to the sides is the risk of injury, which on the mostly hard struts 10 . 12 is reduced.

The pillow 18 can be ventilated and / or inflated and evacuated. For this purpose, the airtight shell 20 of the pillow 18 a closable opening 34 for venting and / or inflation. To ensure the closeability is in the opening 34 a controllable valve 36 arranged.

The pillow 18 can in the extension direction of the support struts 10 . 12 be lengthened and shortened. The aforementioned foam filling 24 has for this purpose an initial form, which in 1 is shown. In this initial form has the compressible foam filling 24 the maximum length L = L _max , which is the distance between the page 30 and the page 32 of the pillow 18 describes. As long as the valve 36 is closed, the headrest can 16 not down towards the backrest 4 be moved because in the chamber 22 air present a squeezing of the pillow 18 prevented. Will the valve 36 opened, so causes the headrest 16 on the pillow 18 exerted pressure that the air through the opening 34 escapes from the pillow and the foam filling 24 is compressed, as in 3 is shown. The headrest 16 is now opposite the backrest 4 lowered while the pillow 18 was shortened from the length L = L _max to the length L = L _i .

The headrest 16 can be adjusted both manually and by means of a not shown height adjustment device, such as a motor, down. In the latter case, the height adjustment was so with the valve 36 interact with that open and the pillow 18 is vented when the headrest 16 is moved down.

After moving the headrest 16 in the lower position ( 3 ), the valve becomes 36 closed again. The air inside the pillow 18 prevents both a further shortening and an extension of the pillow 18 , The foam filling 24 is in the lower position of the headrest 16 compressed, but has a dimensional stability, which leads to the foam filling 24 again the in 1 shown initial shape assumes when the pillow 18 unloaded and ventilated. Will the headrest 16 So again moved up to the upper position and at the same time the valve 36 opened to the pillow 18 to aerate, so urges the foam filling 24 back to the original shape and causes an extension of the pillow 18 , In a specific embodiment, the restoring force of the foam filling 24 also be used for the headrest 16 move upwards. In this way, neither a height adjustment for the headrest to activate, nor a manual adjustment would be required, but would only need the pillow 18 be ventilated.

When adjusting the headrest 16 becomes the pillow 18 so lengthened and shortened that the upper side 30 of the pillow 18 always on the lower side of the headrest 18 and the bottom side 32 of the pillow 18 always on the upper side 6 the backrest 4 regardless of the position of the headrest 16 borders. Here are the adjacent sides 14 . 30 ; 6 . 32 adapted to each other so that both support struts 10 . 12 along its entire visible length, sideways from the pillow 18 are enclosed. The total visible length here denotes the length of that portion of the support struts 10 . 12 that is between the upper side 6 the backrest 6 and the bottom side 14 the headrest 16 extends. Thus, regardless of the headrest position at any time secure lateral shielding of the support struts 10 . 12 guaranteed.

In the illustrated embodiment of the motor vehicle seat 2 is the pillow 18 removable on the motor vehicle seat 2 arranged. The pillow 18 however, can only be removed and replaced if necessary, even if the headrest 16 that together with the struts 10 . 12 removable on the backrest 4 is arranged from the backrest 4 was removed. The lower one page 14 the headrest 16 is not on the upper side 30 of the pillow 18 attached, as well as the upper side of the backrest 4 not on the bottom side 32 of the pillow 18 is attached, leaving the pillow 18 easily removed and replaced. Basically, the pages mentioned 14 . 30 ; 6 . 32 but also be attached to each other. However, the latter offers itself primarily in the following with reference to the 4 to 6 described embodiment of the motor vehicle seat.

The 4 to 6 show a second embodiment of the motor vehicle seat according to the invention 38 , wherein below only the differences from the first embodiment will be discussed, so that the above description applies otherwise correspondingly. For similar or identical parts, the same reference numerals are used.

In the second embodiment, the motor vehicle seat 38 a pillow 40 on, which in contrast to the cushion of the first embodiment, no foam filling 24 so that the chamber 22 only filled with air. To inflate and / or evacuate the pillow 40 Furthermore, a pump, not shown, which is provided via an air line 42 with the opening 34 or the valve 36 in the opening 34 connected is. So can the chamber 22 be evacuated to the pillow by means of the pump 40 To shorten ( 6 ). To the pillow 40 then extend again, via the same pump inflates the pad 40 ,

Also in this second embodiment, the height adjustment of the headrest 16 by lengthening and shortening the pillow 40 be effected. So it would be in the sense of a quick adjustment of the headrest 16 for example, if the lower side 14 the headrest 16 on the upper side 30 of the pillow 18 and the upper side 6 the backrest 4 at the bottom 32 of the pillow 18 is attached. Also in this second embodiment, a separate height adjustment (not shown) may be provided, which in such a way with the cushion 40 is in operative connection that the pillow 40 is inflated when the headrest 16 is moved up and evacuated when the headrest 16 is adjusted down. In this case, the adjacent pages must be 14 . 30 ; 6 . 32 not be attached to each other. Furthermore, the height adjustment should so with the pillow 40 or the valve 36 are in operative connection, that the closable opening 34 is closed when the height adjustment causes no height adjustment, so that an unintentional change in length of the pad 40 regardless of the position of the headrest 16 is prevented.

The pillows 18 . 40 Both embodiments further include a recess facing the vehicle occupant 44 on. In the depression 44 The vehicle occupant may insert his neck or part of the back of his head. The depression 44 is designed as a running from top to bottom, central groove, so that the neck of the vehicle occupant can be supported to the sides.

2

Automotive seat (first embodiment)

4

backrest

6

upper Side of the backrest

8th

wells

10

support strut

12

support strut

14

lower Side of the headrest

16

headrest

18

pillow

20

airtight shell

22

chamber

24

foam filling

26

through tube

28

through tube

30

upper Side of the pillow

32

lower Side of the pillow

34

opening

36

Valve

38

Automotive seat (second embodiment)

40

pillow

42

air line

44

deepening

L

length of the pillow

L _max

maximum Length of the pillow

L _i

length of the compressed pillow

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19806535 C2 [0003]
• - DE 29924138 U1 [0004]
• - DE 19910427 A1 [0005, 0011]
• WO 01/13767 A1 [0006, 0011]

Claims (20)

Motor vehicle seat ( 2 . 38 ) with a backrest ( 4 ) and a headrest ( 16 ), the headrest ( 16 ) via at least one support strut ( 10 . 12 ) with the backrest ( 4 ), characterized in that a ventilatable and / or inflatable cushion ( 18 . 40 ) the at least one support strut ( 10 . 12 ) encloses laterally. Motor vehicle seat according to claim 1, characterized in that the cushion ( 18 . 40 ) at least one continuous tube ( 26 . 28 ), through which the support strut ( 10 . 12 ) from the headrest ( 16 ) to the backrest ( 4 ). Motor vehicle seat according to one of claims 1 or 2, characterized in that the headrest ( 16 ) is adjustable in height, the cushion ( 18 . 40 ) in the extension direction of the at least one support strut ( 10 . 12 ) is renewable and shortenable. Motor vehicle seat according to claim 3, characterized in that the cushion ( 18 . 40 ) is so extensible and shortenable that the cushion ( 18 . 40 ) regardless of the height adjustment of the headrest ( 16 ) on the one hand to the backrest ( 4 ) and on the other hand to the headrest ( 16 ) adjoins. Motor vehicle seat according to claim 4, characterized in that the cushion ( 18 . 40 ) is designed such that the cushion ( 18 . 40 ) the at least one support strut ( 10 . 12 ) encloses laterally along its entire length. Motor vehicle seat according to one of claims 1 to 5, characterized in that the cushion ( 18 . 40 ) is arranged detachably on the motor vehicle seat. Motor vehicle seat according to claim 6, characterized in that the headrest ( 16 ) detachable on the backrest ( 4 ) is arranged, wherein the cushion ( 18 . 40 ) only after removing the headrest ( 16 ) is removable. Motor vehicle seat according to one of claims 1 to 7, characterized in that the cushion ( 18 . 40 ) is designed such that it can be extended by venting. Motor vehicle seat according to one of claims 1 to 8, characterized in that the cushion ( 18 . 40 ) Is designed such that it can be shortened by venting and compression. Motor vehicle seat according to one of claims 8 or 9, characterized in that the cushion ( 18 ) a compressible foam filling ( 24 ) having an initial shape in which the cushion ( 18 ) has its maximum longitudinal extent, wherein the foam filling ( 24 ) is designed such that the foam filling ( 24 ) in the unloaded condition with ventilated cushion ( 18 ) again assumes the initial form Motor vehicle seat according to one of claims 1 to 7, characterized in that a pump for inflating and / or evacuating the pad ( 40 ) is provided. Motor vehicle seat according to claim 11, characterized in that the cushion ( 40 ) by pumping extendable and / or can be shortened by evacuation. Motor vehicle seat according to one of claims 3 to 12, characterized in that the headrest ( 16 ) is height adjustable by the extension and / or shortening of the cushion. Motor vehicle seat according to claim 13, characterized in that the cushion ( 18 . 40 ) on the backrest ( 4 ) still on the headrest ( 16 ) or on the backrest ( 4 ) as well as on the headrest ( 16 ) is attached. Motor vehicle seat according to one of the preceding claims, characterized in that the cushion ( 18 . 40 ) an airtight envelope ( 20 ) with a closable opening ( 34 ) for inflating and / or aerating. Motor vehicle seat according to claim 15, characterized in that the cushion ( 18 . 40 ) with the opening closed ( 34 ) is neither renewable nor shortenable. Motor vehicle seat according to one of the preceding claims, characterized in that a height adjustment device for the headrest ( 16 ) provided in such a way with the cushion ( 18 . 40 ) is in operative connection that the cushion ( 18 . 40 ) is ventilated and / or inflated when the headrest ( 16 ) and is ventilated and / or evacuated when the headrest ( 16 ) is adjusted downwards. Motor vehicle seat according to one of the preceding claims, characterized in that the height adjustment device for the headrest ( 16 ) so with the pillow ( 18 . 40 ) is in operative connection that the closable opening ( 34 ) is closed when the height adjustment causes no height adjustment. Motor vehicle seat according to one of the preceding claims, characterized in that the support strut ( 10 . 12 ) is rigid. Motor vehicle seat according to one of the preceding claims, characterized in that the cushion ( 18 . 40 ) a recess facing the vehicle occupant ( 44 ), in which the neck of the vehicle occupant can be inserted.