EP0559185A1 - Synchronverstelleinrichtung für Bürostühle - Google Patents

Synchronverstelleinrichtung für Bürostühle Download PDF

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Publication number
EP0559185A1
EP0559185A1 EP93103422A EP93103422A EP0559185A1 EP 0559185 A1 EP0559185 A1 EP 0559185A1 EP 93103422 A EP93103422 A EP 93103422A EP 93103422 A EP93103422 A EP 93103422A EP 0559185 A1 EP0559185 A1 EP 0559185A1
Authority
EP
European Patent Office
Prior art keywords
seat part
back support
articulation point
support
adjustment device
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.)
Withdrawn
Application number
EP93103422A
Other languages
German (de)
English (en)
French (fr)
Inventor
Eckhard Hansen
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.)
SDM Hansen AG
Original Assignee
SDM Hansen AG
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 SDM Hansen AG filed Critical SDM Hansen AG
Publication of EP0559185A1 publication Critical patent/EP0559185A1/de
Withdrawn legal-status Critical Current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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs

Definitions

  • the invention relates to a synchronous adjustment device for office chairs, seating or the like according to the preamble of claim 1.
  • synchronous mechanism or synchronous adjustment means the establishment of a combined or dependent back adjustment and seat adjustment, i. H.
  • the adjustment of the back inclination basically also results in an adjustment of the seat.
  • Known office chairs have a relatively complicated mechanical structure for the production of this synchronous adjustment, which of a variety of Articulation points is shaped to coordinate the sequence of movements between the seat part and back part.
  • the inclination of the back part should generally be adjusted in such a way that a counter pressure or a corresponding counter-torque is generated with increasing inclination.
  • the synchronous, ie simultaneous adjustment of the seat part serves to adapt the chair to the ergonomics of the user. Additional pressure units for influencing and damping the individual movements are usually required for the adjustment.
  • Special adjustment devices serve to adapt the chair to the weight of the user, among other things, since a large and heavy user exerts a much greater force on the back part than a lighter, smaller user. The same applies to the load on the seat part, the movement of which is connected to the movement of the back part.
  • a synchronous adjustment device for office chairs according to the preamble of claim 1 has become known from DE 35 20 188 A1.
  • the L-shaped back support is articulated in the middle to rear area of the seat part.
  • Another, lower pivot point is connected to the stationary seat support via a swivel lever.
  • the pivot lever performs a downward rotational movement with increasing inclination adjustment of the back part, so that the seat part is moved downward with increasing inclination adjustment of the back part. This movement is supported against the force of a pressure unit.
  • the seat part is connected to the seat support in a stationary manner via a swivel joint.
  • the synchronous adjustment device has a different kinimate than DE 40 41 157 A1 Sequence of movements, whereby an extremely simple mechanism is used. If one starts from the principle of a conventional deck chair, the fact arises that with increasing inclination of the back the pelvis of the user is not lowered but raised. This results in a certain hollow cross movement, which is perceived as very pleasant by the user.
  • the device according to the invention has a chair mechanism in which the seat part is raised to a small extent with increasing back inclination. This is also done by a pivot point of the back part or the back support on the seat part and a pivoting movement of the back support by means of a pivot lever or a corresponding link guide on the support frame.
  • the pivoting movement is such that there is an upward movement of the pivot point of the back support on the seat part and thus an upward movement of the seat part with increasing back adjustment.
  • This mechanism also automatically resets the back section due to the weight of the user on the seat section. This means that no additional forces are required in the chair. If an additional spring is used, this essentially serves to reset the backrest when the chair is not owned. The leaning force and the dead weight determine the movement of the chair. An additional body weight adjustment by means of an adjustable spring is not necessary.
  • the opening angle between the seat part and the back part is increased very quickly, which has the advantage of a rapid stretching of the body.
  • the working height and eye level are only slightly changed, ie the user does not perform an ergonomically disruptive downward movement in a relaxation position tilted backwards, which would normally have to be compensated for by adjusting the height of the chair.
  • the office chair 1 shown in Figures 1 and 2 exists from a stationary support frame 2 with a chair column 3 for mounting and fastening a seat part 4 and a back part 5.
  • the support frame 2 is designed as a kind of triangular plate, the front chair area 6 being connected in a fixed manner to the support frame 2 at the articulation point 7.
  • the back part 5 is fastened to a back support 8, wherein the back support 8 can be guided outside or inside the back part 5.
  • the back part 5 can itself form the rear region of the back support 8.
  • an upper joint 9 for connecting the back part 5 to the back support 8 is shown.
  • the back support 8 is L-shaped between the seat part and the back part and is Z-shaped in the exemplary embodiment according to FIGS. 1 and 2.
  • the rear longer, approximately vertical leg 10 is used to articulate the back part 5 via the hinge point 9.
  • the lower, approximately horizontal leg 11 of the back support 8 is provided in its front area with a hinge point 13 which connects the rear area 14 of the seat part 4 with the Back support 8 connects.
  • the horizontal leg 11 is followed by a further, approximately vertical leg 12 of the back support 8 which is arranged almost at right angles thereto.
  • the respective center lines are drawn in the legs 10 to 12 in FIG. 1.
  • the angle is ⁇ ⁇ ⁇ ⁇ 90 °, d. H.
  • the back support 8 is formed with its legs 10 to 12 approximately Z-shaped.
  • the lower break point between the vertical leg 10 and the horizontal leg 11 is designated by reference number 15.
  • the distance a between the point 15 and the articulation point 9 is approximately twice as large as the distance b between the point 15 and the articulation point 13 as the articulation point of the back support 8 on the seat part 4.
  • the further downward leg 12 of the Z-shaped back support has a length c, where c ⁇ (0.5 to 1) x b.
  • the lower articulation point of the leg 12 is identified by reference number 16.
  • the articulation of the back support 8 on the support frame 2 takes place via the lower articulation point 16, this articulation point 16 being guided such that it is guided on an arcuate curve 17 over an angular range ⁇ .
  • the curved curve 17 is guided in an upward movement in the direction of the arrow 18, i. H. the center of rotation 19 is in the vicinity of the connecting line 13, 16.
  • This pivoting movement of the articulation point 16 along the curved curve 17 occurs either by means of the pivot lever 20, which is mounted in the pivot point 19 on the support frame 2.
  • the articulation point 16 of the back support can also be guided in a link 21 which is guided along the arcuate curve 17 over the angular range ⁇ .
  • the pivot lever 20 is shown in Fig. 1b, the backdrop 21. However, only one of the two measures is required.
  • the back support 8 is pivoted backwards by a corresponding angle ⁇ 2. This also tilts the lower leg 12 by the angle ⁇ 2 from the vertical position, the lower pivot point 16 moving to the position 16 '. Due to the upward movement of the curve 17, the articulation point 16 rises to the position 16 'by the amount d.
  • the articulation point 13 on the seat part 4 is also shifted upwards on an almost vertical line on the arc 22 with the radius r around the pivot point 7 and by the angle of rotation ⁇ .
  • the seat part 4 is raised by the amount d by lifting the articulation point 13 into the position 13 '.
  • the back part 5 is reset by relieving the back force R by merely loading the seat part 4 with the seat force P, which acts in the articulation point 13 ′ and shifts the articulation point 16 ′ into the lower position 16. Due to the weight of the user, the back part is constantly reset. If the chair is not owned, the hinge point 16 'in FIG. 2 is moved into the lower position 16 by means of an additional compression spring 23, as shown in FIG. 1. Instead of a compression spring 23, a tension spring or a wrap spring can of course also be attached to the pivot lever 20 on the opposite side.
  • the opening angle between the seat part and the back part is greatly increased. Furthermore, a lowering of the eye level is avoided by the downward head movement when leaning backwards.
  • the seat part 4 can also be easily connected in one piece to the back part 5, an elastic intermediate member 24 being provided between the parts.
  • the back support 8 can be connected directly to the back part 5 or form a unit.
  • FIG. 3 shows a movement diagram of the movement sequence of the chair mechanism, the different positions of the back support 8 with the legs 10 to 12, the seat part 4 and the swivel lever 20 being shown. From this representation of the figures, in particular, the upward movement of the articulation point 13 of the back support 8 on the seat part 4 along the path curve 22 and the upward movement of the lower articulation point 16 along the Path curve 17 recognizable.
  • An embodiment according to FIG. 3 with an articulation point 25 also has a leg 12 in order to have a point of application for the restoring moment on the chair mechanism by means of the compression spring 23 or the like.
  • the lever 20 or the backdrop 21 can, however, be omitted.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP93103422A 1992-03-03 1993-03-03 Synchronverstelleinrichtung für Bürostühle Withdrawn EP0559185A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4206612 1992-03-03
DE4206612 1992-03-03

Publications (1)

Publication Number Publication Date
EP0559185A1 true EP0559185A1 (de) 1993-09-08

Family

ID=6453084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103422A Withdrawn EP0559185A1 (de) 1992-03-03 1993-03-03 Synchronverstelleinrichtung für Bürostühle

Country Status (2)

Country Link
EP (1) EP0559185A1 (da)
DE (1) DE4306546A1 (da)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4403123A1 (de) * 1994-02-02 1995-08-03 Link Wilhelm Kg Stuhl, insbesondere Bürostuhl
US6386634B1 (en) 1992-06-15 2002-05-14 Herman Miller, Inc. Office chair
EP2100539A1 (en) * 2008-03-10 2009-09-16 Savo AS Back rest device
USD707995S1 (en) 2012-05-23 2014-07-01 Hni Technologies Inc. Chair
US9198514B2 (en) 2012-05-23 2015-12-01 Hni Technologies Inc. Chair with pivot function and method of making
EP3476254A1 (de) * 2017-10-25 2019-05-01 EB-invent GmbH Sitzmöbel, insbesondere bürostuhl
CN111511252A (zh) * 2017-10-20 2020-08-07 埃科尼斯股份公司 座椅模块
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7207629B2 (en) 2003-06-23 2007-04-24 Herman Miller, Inc. Tilt chair
DE10356190B4 (de) * 2003-12-02 2007-10-04 Christian Erker Sitzlehnenregulierung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247312A2 (de) * 1986-05-26 1987-12-02 Drabert Söhne GmbH & Co. Stuhl
WO1992020262A1 (de) * 1991-05-24 1992-11-26 Equus Marketing Ag Arbeitsstuhl, insbesondere bürostuhl

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247312A2 (de) * 1986-05-26 1987-12-02 Drabert Söhne GmbH & Co. Stuhl
WO1992020262A1 (de) * 1991-05-24 1992-11-26 Equus Marketing Ag Arbeitsstuhl, insbesondere bürostuhl

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6386634B1 (en) 1992-06-15 2002-05-14 Herman Miller, Inc. Office chair
DE4403123A1 (de) * 1994-02-02 1995-08-03 Link Wilhelm Kg Stuhl, insbesondere Bürostuhl
DE4403123C2 (de) * 1994-02-02 2003-06-18 Link Wilhelm Kg Stuhl, insbesondere Bürostuhl
EP2100539A1 (en) * 2008-03-10 2009-09-16 Savo AS Back rest device
US9743773B2 (en) 2012-05-23 2017-08-29 Hni Technologies, Inc. Method of making a chair with pivot function
US9198514B2 (en) 2012-05-23 2015-12-01 Hni Technologies Inc. Chair with pivot function and method of making
USD707995S1 (en) 2012-05-23 2014-07-01 Hni Technologies Inc. Chair
US10448742B2 (en) 2012-05-23 2019-10-22 Hni Technologies Inc. Chair with pivot function
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11825955B2 (en) 2017-06-09 2023-11-28 Steelcase Inc. Seating arrangement and method of construction
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
AU2018351425B2 (en) * 2017-10-20 2020-12-10 Ekornes Asa A seat module
US11122900B2 (en) 2017-10-20 2021-09-21 Ekornes Asa Seat module and tilt mechanism
US10827842B1 (en) 2017-10-20 2020-11-10 Ekornes Asa Seat module
CN111511252A (zh) * 2017-10-20 2020-08-07 埃科尼斯股份公司 座椅模块
CN111511252B (zh) * 2017-10-20 2023-09-19 埃科尼斯股份公司 座椅模块
EP3476254A1 (de) * 2017-10-25 2019-05-01 EB-invent GmbH Sitzmöbel, insbesondere bürostuhl
US10973326B2 (en) 2017-10-25 2021-04-13 Eb-Invent Gmbh Seating furniture
US11602223B2 (en) 2019-02-21 2023-03-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11910934B2 (en) 2019-02-21 2024-02-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11786039B2 (en) 2019-12-13 2023-10-17 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11805913B2 (en) 2019-12-13 2023-11-07 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Also Published As

Publication number Publication date
DE4306546A1 (da) 1993-09-09

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