Seat backing having an inclined sitting face

Abstract

A seat backing formed by a closed hollow plastic jacket defining a chamber fillable with a fluid and a valve, provided in the jacket, serving for feeding the fluid to the chamber. The invention includes a bearing region for holding a seat; a sitting region for receiving a sitting person; and a transition region formed between the bearing and sitting regions. The sitting region includes an upper sitting region and a lower sitting region. The transition region includes upper and lower sections formed around the sitting region and the bearing region to be integrally interconnect the bearing region and the sitting region. The area of sitting and bearing regions increases when the seat backing is used.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application is a Continuation-in-Part of U.S. Ser. No. 10 / 0918,375, filed Aug. 16, 2004, which claims priority of DE 202004011087.3, filed Jul. 15, 2004, which applications are incorporated herein by reference in their entirety.TECHNICAL FIELD [0002] The present invention relates to a seat backing, Specifically, the present invention relates to a hollow seat backing having a particularly designed seat- and bearing region. A generic seat backing is already known from EP 705549 B1. RELATED INFORMATION [0003] Various seat backings are known which are bolster-like and are therefore also referred to as seat bolsters. Such seat bolsters are either filled with elastic or resilient materials such as feathers, foam or the like, or their elastic stiffness is achieved by an enclosed fluid- or gas volume such as water or air. Also known are so-called seat bolsters which have a special wedge-shaped design and hence provide an inclined sitting fa...

AI Technical Summary

Benefits of technology

[0005] Therefore, the present invention provides a seat backing which stands out for simple design and handling and which effects an ergonomically advantageous sitting position or posture of the person sitting thereon and also promotes dynamic sitting as is known to be advantageous and simultaneously allows tilting of the pelvis. It is further intended that the seat backing should provide a stable as well as largest possible sitting area for persons.

[0007] The fluid in the chamber is fed by means of a valve which is located on the plastic jacket and is integrated therein. The seat backing comprises a bearing region and a sitting region which is intended for receiving the sitting person. The bearing region and the sitting region are connected to a transition region provided therefor. The inclination of the sitting region in comparison with the bearing region according to the invention produces a top or upper and a bottom or lower sitting section of the sitting region. The inclination of the sitting region with respect to the bearing region according to the invention allows a slightly inclined sitting posture which fits in with the needs and habits of the sitting person which facilitates rocking of the spine of a person sitting on the sitting region proximate to the upper sitting region while substantially fixing the legs of the person sitting on the sitting region. The transition region according to the invention comprises an upper section and a lower section which are respectively formed around the sitting and bearing regions so that these sections mainly enclose the bearing face and the sitting face integrally and interconnect them. The faces of the upper and lower sections according to the present invention define in the upper and in the lower sitting region at least partially a sitting face which is increased when the seat backing is used, as the user deforms by his / her weight the transition region and uses the sitting region as a sitting face.

[0008] The inclined face of the sitting region causes a greater elastic deformation of the transition region for a same weight of the user as compared with conventional seat backings or hollow bodies, namely particularly in the upper sitting region and the upper section of the transition region.

[0014] It is preferred that the transition region forms a continuous marginal edge in the region of the lower sitting section to provide a low height dimension.

[0016] It is preferred that the plastic jacket has protrusions made of the same material. It is preferred that the protrusions made of the same material result in improved elastic properties of the seat backing.

[0019] It is preferred that the sitting region and the bearing region are substantially flat in the unloaded state. This prevents bulging and a deformation of the faces which is unfavorable to convenience. Moreover, a flat or substantially flat design provides an elastic deformation of the transition region.

Problems solved by technology

These known seat backings lead, however, to an ergonomically incorrect sitting posture and to incorrect active or dynamic sitting, as they comprise a direct, substantially vertical face having a low elastic concavity or curvature in the junction region between the sitting face and the bearing face.

This vertical joining region of the seat backing does not allow a sufficient movement mobility of the sitting person when the pelvis moves laterally or forwards and backwards.

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