EP0574375B1 - Arbeitssessel, insbesondere Bürosessel - Google Patents

Arbeitssessel, insbesondere Bürosessel Download PDF

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Publication number
EP0574375B1
EP0574375B1 EP93890114A EP93890114A EP0574375B1 EP 0574375 B1 EP0574375 B1 EP 0574375B1 EP 93890114 A EP93890114 A EP 93890114A EP 93890114 A EP93890114 A EP 93890114A EP 0574375 B1 EP0574375 B1 EP 0574375B1
Authority
EP
European Patent Office
Prior art keywords
bearing
seat surface
seat
chair
disc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93890114A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0574375A1 (de
Inventor
Hedwig Froschauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0574375A1 publication Critical patent/EP0574375A1/de
Application granted granted Critical
Publication of EP0574375B1 publication Critical patent/EP0574375B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects

Definitions

  • the invention relates to a work armchair, in particular office armchair, with a seat, a backrest and a support frame, which has a preferably height-adjustable, resiliently flexible bearing for the seat.
  • Sitting for long periods on an immobile seat leads to strain on the spine in poor posture and, as a result, to pain, spinal disc damage and disorders of the musculoskeletal system. Only a constant change of the sitting postures can counteract static overloads. For this it is necessary to mount the seat flexibly and to ensure that the seat can be shifted with little effort. This enables rocking not only to allow natural muscle relaxation, but also to relieve the vertebral joints and improve nutrition of the intervertebral discs.
  • the bearing Since the bearing is located in the middle of the seat, the load line on the spine of an armchair user runs outside of this bearing, which, due to the horizontal distance between the center of gravity of the trunk and the center of the bearing, leads to a considerable shear load on the rubber body, especially when tipping backwards leads if these thrust forces can not be absorbed through the support column passing through the bearing.
  • the bearing loads that occur when the seat is tilted can be absorbed by the pretension of the rubber body, but this pretension causes considerable physical forces to adjust the inclination of the seat. This is particularly disadvantageous because the given transmission ratios require a higher force to tilt the seat surface from the outset, so that the spine is inevitably stressed in incorrect posture.
  • the invention is therefore based on the object of designing a work armchair of the type described at the outset in such a way that sitting in any sitting posture which is harmless to the body or posture is made possible with little construction effort.
  • the invention solves the problem in that the bearing for the seat is arranged in the rear third and that the load line of the spine in the neutral position of an armchair user runs approximately through the center of the bearing.
  • the advantageous position of the center of gravity of the fuselage relative to the bearing for the seat surface results in comparatively small horizontal distances of the center of gravity of the fuselage from the center of the bearing even at larger angles of inclination of the seat surface, which results in an advantageous reduction in the thrust forces acting on the bearing, so that the bearing is made from a simple, the height can consist of resilient, non-prestressed washer which does not have to be penetrated by a support column or the like.
  • the lack of pretension not only allows for a simplification of the design, but also supports the movement of the seat with little effort. There is also no need for special means for limiting the deflection and for reducing noise.
  • the disc yields in all directions, effectively represents an additional intervertebral disc and acts as an optimal pressure distribution medium.
  • the work chair has a support frame 1 with a star-shaped foot 2 and with a support column 3, which can be extended telescopically and can be fixed in the desired length for height adjustment of a seat 5 by means of a screw 4 or the like.
  • a separate backrest 6 is provided, the holder 7 of which is pivotally mounted on a cross member 8 of the support column 3 and can be pivoted backward against the force of a return spring in a stop-limited manner.
  • an elastically flexible, disc-shaped bearing 9 is provided on all sides, which is arranged in the rear third of the seat 5.
  • the load line 10 of the spine of an armchair user in its neutral position runs approximately through the center of the bearing.
  • FIGS. 1 to 4 From the representations of FIGS. 1 to 4 it follows that the seat 5, due to its special positioning, follows all body movements, the load line 10 of the spine seeking adaptation to the vertical if the body is not supported by the arms or the backrest, like this for posture after work Fig. 2 and for the reclined relaxation posture according to Fig. 3 is the case.
  • the seat 5 tilts forward and thus prevents the pressure on the thighs from being increased by the seat.
  • FIG. 4 there is a favorable, namely uniform loading of the intervertebral discs and vertebral joints due to the inclination of the seat surface 5 following the body.
  • FIG. 4 To better illustrate this situation, the illustration of the backrest 6 has been omitted in FIG.
  • the bearing 9 consists of a rubber washer 12 vulcanized between two metal plates 11, the two metal plates 11 each having two threaded bores 13 offset by 90 ° for connection to the support column 3 or the cross member 8 and the seat 5.
  • the bearing 9 according to FIG. 6 has a rubber body 15 divided into several chambers 14, the chambers 14 of which can be filled with water, air or a gel.
  • the filling pressure of the innermost chamber 14 can advantageously be chosen to be lower than the filling pressure of the outer chambers.
  • the bearing 9 can advantageously be arranged interchangeably between the seat surface 5 and the support frame 1 in order to be able to use bearings of different hardness to adapt to the body weight of the chair user.
  • the design of the bearing 9 is not important if there is only a corresponding resilience in height in order to ensure that the seat surface 5 can be pivoted to a limited extent, as is also the case when using annular disks or disks dissolved in elastic individual bodies is.
  • Another possibility of adapting the bearings 9 to the body weight of an armchair user is to provide resiliently flexible disks of different diameters. Different disc diameters can also be ensured, however, by providing additional rings 16, which are designed to be resilient in height and, for example, made of a rubber-elastic one Material. These additional rings 16 can enclose a base plate, as is indicated in FIG. 7. The width of the additional ring 16 can be different if the use of several additional rings 16 is avoided.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Saccharide Compounds (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Plural Heterocyclic Compounds (AREA)
EP93890114A 1992-06-10 1993-06-07 Arbeitssessel, insbesondere Bürosessel Expired - Lifetime EP0574375B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1181/92 1992-06-10
AT0118192A AT398160B (de) 1992-06-10 1992-06-10 Arbeitssessel, insbesondere bürosessel

Publications (2)

Publication Number Publication Date
EP0574375A1 EP0574375A1 (de) 1993-12-15
EP0574375B1 true EP0574375B1 (de) 1996-01-10

Family

ID=3508368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93890114A Expired - Lifetime EP0574375B1 (de) 1992-06-10 1993-06-07 Arbeitssessel, insbesondere Bürosessel

Country Status (4)

Country Link
EP (1) EP0574375B1 (da)
AT (2) AT398160B (da)
DE (1) DE59301389D1 (da)
DK (1) DK0574375T3 (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6176548B1 (en) 1998-10-23 2001-01-23 Haworth, Inc. Tilt mechanism for chair having adjustable spring characteristics
US6209958B1 (en) 1998-10-23 2001-04-03 Haworth, Inc. Universal tilt mechanism for a chair
CN101522075B (zh) * 2006-03-24 2012-03-28 Hni技术公司 增强可调节性的躺椅

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4421597A1 (de) * 1994-06-21 1996-01-04 Link Wilhelm Kg Stuhl, insbesondere Bürostuhl
DE19547964A1 (de) * 1995-12-21 1997-06-26 Wolfgang Dr Fitz Sitzelement
US5951109A (en) * 1997-04-30 1999-09-14 Haworth, Inc. Chairback with side torsional movement
US6059363A (en) * 1997-04-30 2000-05-09 Haworth, Inc. Chairback with side torsional movement
DE50006068D1 (de) * 1999-02-02 2004-05-19 Oliver Keller Dynamische sitzvorrichtung
DE10020668A1 (de) * 2000-04-27 2001-10-31 Fritz Curtius Sitzmöbel
CN101801241B (zh) 2007-03-13 2013-06-05 Hni技术公司 动态座椅靠背腰部支撑系统
CN107023096A (zh) 2010-05-05 2017-08-08 奥斯蒂尔公司 用于对接釉面墙板的可移动且可拆解墙板系统
CN102940396A (zh) * 2012-12-01 2013-02-27 郭现娟 一种多功能学习椅
CA2906736C (en) 2013-03-15 2021-11-02 Hni Technologies Inc. Chair with activated back flex
WO2015160693A1 (en) 2014-04-17 2015-10-22 Hni Technologies Inc. Flex lumbar support
USD731833S1 (en) 2014-04-17 2015-06-16 Allsteel Inc. Chair
US9801470B2 (en) 2014-10-15 2017-10-31 Hni Technologies Inc. Molded chair with integrated support and method of making same
USD743180S1 (en) 2014-10-15 2015-11-17 Hni Technologies Inc. Chair

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3309137A (en) * 1966-05-13 1967-03-14 Aaron A Wiebe Seating arrangement
US3547393A (en) * 1968-01-08 1970-12-15 Hickory Springs Mfg Co Inc Rocker-swivel device
DE2055684A1 (de) * 1970-11-12 1972-05-18 Walcher Geb Endrich E Sitzgelegenheit
DE2303442A1 (de) * 1973-01-25 1974-08-01 Fletcher Brothers Castings Ltd Moebel, insbesondere sitzmoebel
US4131260A (en) * 1977-05-09 1978-12-26 Center For Design Research And Development N.V. Chair seat mount which permits the seat to tilt forward
CH678388A5 (da) * 1989-04-25 1991-09-13 Hugo Degen
IT1234373B (it) * 1989-08-04 1992-05-15 Kairos Snc Bonetti Manete Mion Dispositivo di supporto del sedile di poltroncine e simili ad inclinazione autocontrollata.
US5048893A (en) * 1990-07-16 1991-09-17 Benjamin Cowan Ergonomic chair

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6176548B1 (en) 1998-10-23 2001-01-23 Haworth, Inc. Tilt mechanism for chair having adjustable spring characteristics
US6209958B1 (en) 1998-10-23 2001-04-03 Haworth, Inc. Universal tilt mechanism for a chair
CN101522075B (zh) * 2006-03-24 2012-03-28 Hni技术公司 增强可调节性的躺椅

Also Published As

Publication number Publication date
EP0574375A1 (de) 1993-12-15
AT398160B (de) 1994-10-25
ATA118192A (de) 1994-02-15
DK0574375T3 (da) 1996-05-20
DE59301389D1 (de) 1996-02-22
ATE132710T1 (de) 1996-01-15

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