Chairs and seats – Bottom or back with means to alter contour – Providing support for lower back region
Patent
1996-10-17
2000-06-27
Nelson, Jr., Milton
Chairs and seats
Bottom or back with means to alter contour
Providing support for lower back region
2972841, A47C 3025
Patent
active
060797835
DESCRIPTION:
BRIEF SUMMARY
The invention concerns a back-rest for seats of all kinds, especially for car seats, office chairs and armchairs, with an essentially flat support piece and an adjustable lordosis support, where the flat support piece is constructed, at least in the area where the lordosis support is located, as a tub-like bulge, which contains protrusions as holding devices and/or guides for attaching and guiding the lordosis support.
From the EP-A1-0 011 396, the U.S. Pat. No. 4,182,533 and the DE-A-23 46 125, back-rests for seats in accordance with the characterizing portion of claim 1 are known.
In these cases, the flat support piece is always of a large size and thus it is difficult to handle during the mounting of the adjustable lordosis support.
It is the objective of the invention to construct the back-rest of a seat with a flat support piece and with an adjustable lordosis support in such a manner that the production and mounting are simplified.
This objective is being achieved by a back-rest having the characteristics of claim 1.
Information concerning advantageous embodiments of the invention can be gathered from the subordinate claims.
The invention will be explained below in more detail on the basis of different examples of its embodiments and by reference to the drawings. The following is shown:
FIG 1 a support piece for a back-rest in the form of a channel, which is disposed at a frame and contains a lordosis support, which can be adjusted with regard to its height and its curvature;
FIG. 2 the same as in FIG. 1 in a longitudinal section;
FIG. 3 the same as in FIG. 1 in a transverse section;
FIG. 4 a support piece for a back-rest, which has been integrated into a bowl with a bulge;
FIG. 5 the same as in FIG. 3 in a longitudinal section;
FIG. 6 the same as in FIG. 3 in a transverse section;
FIG. 7 a support piece for a back-rest with a recess, in which a separate formed part with a bulge has been disposed;
FIG. 8 a section along line VIII--VIII in FIG. 7;
FIG. 9 a section along line IX--IX in FIG. 7;
In FIGS. 7 to 9, examples of an embodiment in accordance with the claims are shown, whereas the example of the embodiment shown in FIGS. 1 to 6 only show individual characteristics of the claims.
The example of the embodiment of a back-rest shown in FIGS. 1 to 3 includes a support piece 1 in the shape of a channel 1a with a central plate 2 and with side pieces 3, which are disposed at an angle to it, while their free edges 4, which are at an angle, are supported on the lateral bars of a frame 5 of a back-rest.
The support piece 1 consists of an essentially rigid material, for example of a plastic material, while the frame 5 consists preferably of a metal and can be constructed in a U-shaped form. The support piece 1 is additionally attached to the cross-struts 6 and 7--preferably made of metal--of the frame 5 by means of fastening elements 8, which are disposed at the rear side of the support piece 1. In the example of the embodiment, the cross-struts 6, 7 have a circular cross-section, and the fastening elements 8 (FIG. 2 and 3) on the rear side of the support piece 1 are constructed as snap connections for receiving the cross-struts 6, 7. By means of this type of snap connection, the support piece 1 can be attached to the frame 5 in a simple and rapid manner without the use of a tool.
In the central plate 2, two guides 9 are provided, both at the top and at the bottom, on which guides the upper and the lower end of the lordosis support 10 are positioned in such a manner that they are both movable. The guides 9 are preferably made in such a way that the lordosis support 10 can be inserted in them or placed upon them without a tool, preferably in the form of any type of known slide and/or snap connections. The guides 9 can, for example, be made as protruding rails or in the form of recesses, and they have the purpose of placing the ends of the lordosis supports 10 in or upon them in such a manner that they are movable.
In the central plate 2, two guides 9 are provided, both at the top and at the bottom, on which
REFERENCES:
patent: 4182533 (1980-01-01), Arndt et al.
patent: 4541670 (1985-09-01), Morgenstern et al.
patent: 4632454 (1986-12-01), Naert
patent: 5217278 (1993-06-01), Harrison et al.
English language translation of the abstract of DE 2,346,125.
Klingler Knud
Schuster, Sr. Wilhelm
Jr. Milton Nelson
Wilhelm Schuster, Senior
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