Chairs and seats – Bottom or back with means to alter contour
Reexamination Certificate
1998-09-02
2001-09-04
Nelson, Jr., Milton (Department: 3624)
Chairs and seats
Bottom or back with means to alter contour
Reexamination Certificate
active
06283547
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a back rest of a motor vehicle seat. The back rest has a back rest support, which provides the mechanical stability and which is linked in the usual way to the seat support or directly at the underframe of the motor vehicle seat. Furthermore, it has an upholstery body. The already known back rest is embodied in a foldable manner for a better adjustment of the back rest to the back of a user and according to the wishes of the person. An upper section can be adjusted within a certain angle to a lower section.
The invention aims to a further development of such a back rest. It is the aim to have a back rest, with which the separate adjustment of the upper section of the back rest has as little relevance as possible with regard to the safety, namely can be embodied in a mechanical manner, because other sections will take over the safety function. This fact enables an embodiment of light weight of the additional adjustment device for the area of the upper back rest.
SUMMARY OF THE INVENTION
According to this, it is the task of the invention to further develop the already known back rest of a motor vehicle seat in such a way that the components, which are necessary for the adjustment device are simple, of light weight and of little relevance with regard to safety and the additional adjustment functions can be added to the already existing construction of the back rest in the most possible simple manner.
This task is solved according to the invention by a back rest of a motor vehicle seat, which comprises a back rest support, onto which a shoulder rest for a separate adjustment of an upper section of the back rest is provided, whereby the shoulder rest is linked to the back rest support and that an adjustment device is allocated to it, which is embodied as an air bag, which can be filled and emptied in a controlled manner and which is arranged between the back rest support and the shoulder rest and that re-adjusting means are provided, which are arranged between the shoulder rest and the back rest support and which stress the shoulder rest in one of its two extreme positions, for example the position of the smallest distance from the back rest support.
According to the invention, the back rest support is embodied in the usual way as with a motor vehicle seat, which is not provided with the additional adjustment function. The shoulder rest is linked onto it. The shoulder rest can be moved and adjusted in a relative manner to the back rest support via an adjustment device. In a relative position between the shoulder rest and the back rest support, for example in the furthest position to the back, a configuration is given in the same manner as it is given with a back rest, which is not embodied with the additional adjustment function. Opposite this point of reference the upper area of the back rest can be additionally tilted slightly to the front under all circumstances, but possibly also towards the back, by tilting the shoulder rest opposite the back rest support.
An air bag, which can be filled and emptied in a controlled manner, is arranged between the back rest support and the shoulder rest for the adjustment device. It effects an adjustment in only one direction, for example in the sense of a swing-out of the shoulder rest out of the back rest support. The opposite direction is served by the piece of re-adjusting means. It can be embodied in a passive way, for example as a piece of elastic means, for example via springs. It may also be active, for example it may comprise a second air bag.
The air bags can either be vacuum cushions or pressure cushions. With a motor vehicle the vacuum cushions have the advantage, that a vacuum is usually available.
Preferably, the shoulder rest is embodied as a U-shape strap, which is linked to the back rest support on both sides. It can be strung with springs, which support the upholstery, for example springs, which extend between its arms. It can also embody a supporting surface for an upholstery body.
Hereby, in a preferred development of the invention, the back rest takes over the task of supporting the upholstery body above the swiveling point, while the upholstery body of the back rest is arranged at the back rest support below the swiveling point.
In an especially preferred development the head rest of the back rest is connected with the shoulder rest in a mechanical manner. An adjusting movement of the shoulder rest is transferred to the head rest in such a way that the latter always has the same distance with regard to the shoulder rest. Due to that, it is avoided that the head rest has to be re-adjusted separately, when adjusting the shoulder rest. Thereby the head rest preferably remains arranged mechanically to the back rest support all the same and it is only tilted in an angular adjustment towards the same in such a way that the head rest cushion always remains in the same distance to the upper edge of the shoulder rest.
As an alternative it may be more simple with regard to the construction, to appoint the head rest to the back rest support and to not make its position adjustable with the shoulder rest.
REFERENCES:
patent: 4626028 (1986-12-01), Hatsutta et al.
patent: 5058953 (1991-10-01), Takagi et al.
patent: 5082326 (1992-01-01), Sekido et al.
patent: 5370443 (1994-12-01), Maruyama
patent: 5826937 (1998-10-01), Massara
patent: 5836651 (1998-11-01), Szerdahelyi et al.
Bauer Heinz
Becker Burckhard
Frohnhaus Ernst-Reiner
John Lezdey & Assoc
Jr. Milton Nelson
LandOfFree
Back rest of a motor vehicle seat, which has an adjustable... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Back rest of a motor vehicle seat, which has an adjustable..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Back rest of a motor vehicle seat, which has an adjustable... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2477903