Chairs and seats – Movable bottom – Interconnected with back for relative concurrent movement
Patent
1998-07-10
2000-08-01
Cuomo, Peter M.
Chairs and seats
Movable bottom
Interconnected with back for relative concurrent movement
297311, 297353, A47C 106
Patent
active
060956062
DESCRIPTION:
BRIEF SUMMARY
The invention concerns an adjusting device for chairs, wherein the seat portion and back portion in their approximately horizontal and vertical direction respectively are movable by means of adjusting mechanisms for synchronous movement by means of a common operating body.
A device of this type is known from EP-A-0539733. The chair described in this publication has a moveable seat portion which when depressed is moved downwardly and forwardly and thereby causes a lowering of the back portion of the chair in order to provide a more convenient sitting position.
The requirements for the design of chairs, and especially work and office chairs, are becoming increasingly stringent with regard to the correct adjustment of the chair, i.e. the individual adaptation to the user in order to achieve a correct and comfortable sitting position. This requirement is important since such chairs are used over a long period of time, with the result that an incorrect adjustment feels uncomfortable and leads to harmful sitting positions.
An increasing number of adjusting mechanisms for chairs have therefore been developed, which permit adjustment both of the back in the height direction and the seat portion forwards and backwards, thus enabling the chair to be adapted to the person's individual body size. Tilting chairs require adjustment of the spring resistance both for backward tilt and forward tilt. In addition further adjustments can be made both of sitting angles, seat heights, armrest heights, width between armrests, etc., with the result that it can often be a problem for the user to understand and operate the correct levers in order to obtain the required position. The result of this is that, after originally having found an approximately suitable position, the user often does not perform the further adjustments. With so many adjustment levers and wheels (one chair advertises over 20), the task of adjusting the chair can appear so complicated that the user does not even attempt to adjust it to his requirements, and to his size and weight.
There is therefore a requirement to simplify the adjustment, while still achieving the best possible functionality and preferably also means for resisting tilting.
The object of the present invention is to provide an adjusting device which permits such a simple adjustment. Thereby the size of the chairbody shall be adjusted to a depth to the size of the user.
This is achieved with an adjusting device of the type mentioned in the introduction, which is characterized by the features which are indicated in the patent claims.
In the invention the size of the chair body is adjusted to adapt to the size of the user. The basis for the invention is that most adjustments preferably should be capable of implementation with a simple adjusting mechanism, preferably a lever or a wheel. By turning such a wheel or moving such a lever it should therefore be possible to perform basic adjustments which will provide satisfactory functionality for most people. The parts move simultaneously in relation to one another in a "normal relationship". This adjustment, which automatically and simultaneously will adjust both the seat portion and the back portion, is based on the fact that large people require a large chair body, while a correspondingly smaller chair body is best for smaller people. The adjustment possibilities for the backrest and the seat portion have therefore been linked, these two main components of the chair either being pushed from each other or drawn towards each either by a simple rotating movement of the adjusting wheel or lever. Thus, by means of a simple hand maneuver, the user will be able to perform a principal adjustment of the chair (both of seat depth and backrest height). It is essential that both parts of the chair should move and not only the backrest, since the chair body's tilting point should be located directly below the body weight whether the user is small or large. It will be possible to achieve the same "normal relationship" displacement between these parts by locking t
REFERENCES:
patent: 2509102 (1950-05-01), Kuebler
patent: 4854641 (1989-08-01), Reinemann et al.
patent: 5007678 (1991-04-01), DeKraker
patent: 5131717 (1992-07-01), Kaminiski et al.
patent: 5193880 (1993-03-01), Keusch et al.
patent: 5354120 (1994-10-01), Volkle
patent: 5486035 (1996-01-01), Koepke et al.
patent: 5695250 (1997-12-01), Lin
patent: 5860701 (1999-01-01), Jungjohann et al.
patent: 5868468 (1999-02-01), Wang
Buck Brian H.
Cuomo Peter M.
Peter Opsvik AS
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