EP0669816B1 - Stuhl, insbesondere bürostuhl - Google Patents

Stuhl, insbesondere bürostuhl Download PDF

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Publication number
EP0669816B1
EP0669816B1 EP94925442A EP94925442A EP0669816B1 EP 0669816 B1 EP0669816 B1 EP 0669816B1 EP 94925442 A EP94925442 A EP 94925442A EP 94925442 A EP94925442 A EP 94925442A EP 0669816 B1 EP0669816 B1 EP 0669816B1
Authority
EP
European Patent Office
Prior art keywords
seat
chair
axis
frame
chair according
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
EP94925442A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0669816A1 (de
Inventor
Fredi Dubach
Jürgen Schraysshuen
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 EP0669816A1 publication Critical patent/EP0669816A1/de
Application granted granted Critical
Publication of EP0669816B1 publication Critical patent/EP0669816B1/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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/446—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with fluid springs

Definitions

  • the invention relates to a chair, in particular an office chair, according to the preamble of claim 1.
  • the movement of the user is determined on the one hand by the shape and arrangement of the joints, which determine the direction and the angle of rotation of the movement, and on the other hand by the swivel radius, which results from the length of the limbs that are moved around a body joint.
  • pivot movements allow different angles.
  • the swiveling movements and pivot points of the person must match those of the chair mechanics as far as possible.
  • Axle constructions can generally be dispensed with if you note that a swivel angle range of at most 25 ° is sufficient for such chairs. This makes it possible to use a swivel mechanism that allows swiveling around a virtual axis lying outside the chair construction. This virtual axis coincides with the relevant movement joints of the human body.
  • the ankle becomes the fulcrum for moving the body in a relaxed position.
  • the pivot about this pivot point Lower leg with the same angle as the seat back. Swiveling reduces the distance between the floor and lower leg. If the chair is now to take this movement completely and informally, the following requirements apply to the movement of the seat surface: If the seat is loaded in the rear area, the seat surface must pivot pivoting back and down around the ankle joint. So the reference system for the seat movement lies in the ankle joint and not - as usual - in the front, lower area of the seat.
  • a chair of the type presupposed in the preamble is already known (WO 87/06810), in which the axis of the swiveling backrest runs through the hip joints of the user.
  • the pivot axis of the seat part coincides with the pivot axis of the backrest.
  • Such a construction cannot meet the requirement that the support area of the user should be guided backwards and downwards when swiveling back in order to achieve a comfortable, relaxed position of the back. To achieve a comfortable position, the user must change his foot position and also adjust the seat height.
  • the invention has for its object to provide a chair that enables dynamic sitting while taking the relevant ergonomic aspects into account as fully as possible.
  • the chair according to the invention corresponds completely, at least but almost completely, the ergonomic necessities resulting from the described conditions.
  • the desired and ergonomically favorable movement sequences can be implemented in the constructive design of chairs with comparatively little effort.
  • FIG. 1 Two different user positions are symbolized in FIG.
  • the user In the starting position, in which the lower legs are substantially perpendicular to the floor, the user is shown with an upright spine with a blackened overall contour.
  • the solid lines of the only indicated chair with armrest correspond to this position; in a second, bent back position, only the outlines of the user are shown, while the chair contours are indicated by dashed lines.
  • This joint through the ankles is also the first axis of the chair.
  • the knee joint is labeled G when the user is upright and the hip joint is labeled H when the user is in an upright position.
  • FIG. 2 The basic structure of a chair without an armrest can be seen from FIG.
  • the perspective representation according to FIG. 2 shows the complete chair, the representation of the seat and backrest upholstery as well as the star base with casters and the central area of the star base, which continues in the standpipe 3, are missing.
  • a seat support counterpart 6 is attached to the standpipe 3.
  • the seat support 5 engages in the seat support counterpart 6.
  • the seat support 5 is attached centrally to the seat frame 1a.
  • the backrest frame 2a can be pivoted relative to the seat frame 1a.
  • the structure of the chair according to Figure 3 is similar.
  • the connection between the backrest frame 2a and the seat frame 1a is different, however.
  • the curved regions 11a of the armrests 11 are pushed into the upwardly bent rear ends 1c of the seat frame 1a.
  • the double arrow 12 symbolizes the pivoting mobility of the armrests 11.
  • 1 denotes the entire seat, which consists of a seat frame 1a and a seat cushion 1b.
  • the seat frame 1a consists of rectangular tubes, of course, other materials with other cross sections are also conceivable.
  • the two side, rectangular tubes of the seat frame 1a are bent upward at their rear region with the radius r 2 .
  • the radius r 2 corresponds to the distance between the second axis H, which coincides with the hip joint, and the center line 14 of the curved region 1c.
  • a bent or curved area 2c of the backrest designated as a whole by 2, engages in the bent area 1c.
  • the backrest 2 essentially consists of a backrest frame 2a and a backrest cushion 2b.
  • the center line 14 of the curved portion 1c of the seat and the curved portion 2c of the backrest frame 2a coincide.
  • the regions 1c and 2c curved with the same radius r 2 are slidably connected to one another via curved bearings, for example curved longitudinal ball bearings.
  • the standpipe 3 is adjustable in height with respect to the base 4 provided with castors.
  • the seat support counterpart 6, into which the seat support 5 is immersed, is attached to the standpipe 3.
  • Seat support 5 and seat support counterpart 6 have a coincident center line 13 which is curved with the radius r 1 about the first axis K, which runs through the user's ankles.
  • the curved seat support 5 is slidably guided in the curved seat support counterpart 6 with the aid of only schematically indicated longitudinal ball bearings. All other types of slide guides can also be used, for example plastic guides.
  • a spring element 9 is arranged, which shortens under load.
  • This spring element is an energy accumulator, which can be designed, for example, as a conventional gas pressure spring can.
  • a corresponding spring element 10 is arranged between the backrest frame 2a and the curved region 1c of the seat frame, and is shortened when the backrest is pivoted backwards, as can be seen, for example, from a comparison of FIG. 4 with FIG. 5.
  • FIGS. 8 and 9 which corresponds to the schematic representation of FIG. 3, the basic structure of the chair is the same.
  • an armrest 11 which consists of a support 11b and an armrest down tube 11c.
  • the armrest down tube is curved in its rear area, with the same radius as the rear curved piece 1c of the seat frame.
  • Figure 8 shows the armrest in the use situation.
  • FIG. 9 shows the swiveled-up armrest, in which the down tube 11c forms an extension of the contour of the backrest frame 2a.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Hydrogenated Pyridines (AREA)
  • Chairs Characterized By Structure (AREA)
EP94925442A 1993-09-21 1994-08-10 Stuhl, insbesondere bürostuhl Expired - Lifetime EP0669816B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4331987A DE4331987A1 (de) 1993-09-21 1993-09-21 Stuhl, insbesondere Bürostuhl
DE4331987 1993-09-21
PCT/EP1994/002642 WO1995008284A1 (de) 1993-09-21 1994-08-10 Stuhl, insbesondere bürostuhl

Publications (2)

Publication Number Publication Date
EP0669816A1 EP0669816A1 (de) 1995-09-06
EP0669816B1 true EP0669816B1 (de) 1997-12-03

Family

ID=6498162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94925442A Expired - Lifetime EP0669816B1 (de) 1993-09-21 1994-08-10 Stuhl, insbesondere bürostuhl

Country Status (6)

Country Link
EP (1) EP0669816B1 (ja)
JP (1) JPH08503644A (ja)
AT (1) ATE160682T1 (ja)
CA (1) CA2149898A1 (ja)
DE (2) DE4331987A1 (ja)
WO (1) WO1995008284A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257666B1 (en) 1999-01-08 2001-07-10 Andreas Struppler Office chair

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29600821U1 (de) * 1996-01-18 1997-05-28 Grammer Ag Stuhl, insbesondere Bürostuhl
CA2302063C (en) 2000-03-23 2010-08-17 Cke Technologies Inc. Ergonomic chair
DE10109624C1 (de) * 2001-02-28 2002-09-12 Interstuhl Bueromoebel Gmbh Stuhl, insbesondere Bürostuhl
DE10115501C2 (de) * 2001-03-29 2003-03-27 Struppler Associates Design Gm Stuhl, insbesondere Bürostuhl
DE102006023981A1 (de) 2006-05-22 2007-12-06 Wilkhahn Wilkening + Hahne Gmbh & Co. Kg Stuhl
DE102008011309B3 (de) * 2008-02-27 2009-06-04 Thonet Gmbh Bürostuhl
EP3691497B1 (en) * 2017-10-05 2024-04-24 Godrej & Boyce Mfg. Co. Ltd. Posture adaptive work chair

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2448770C3 (de) * 1974-10-12 1979-03-01 Daimler-Benz Ag, 7000 Stuttgart Schwenkbare Armstütze
US4408800A (en) * 1980-06-11 1983-10-11 American Seating Company Office chairs
NO160896C (no) * 1986-05-09 1989-06-14 Jurek Buchacz Stillbar sitteanordning.
DE3616475C1 (de) * 1986-05-15 1987-06-11 Kusch Co Sitzmoebel Hoehenverstellbarer,mit Gasdruckfeder ausgestatteter Drehstuhl,insbesondere Buerostuhl oder -sessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6257666B1 (en) 1999-01-08 2001-07-10 Andreas Struppler Office chair
DE19900454C2 (de) * 1999-01-08 2001-10-25 Andreas Struppler Stuhl, insbesondere Bürostuhl

Also Published As

Publication number Publication date
DE4331987A1 (de) 1995-03-23
EP0669816A1 (de) 1995-09-06
JPH08503644A (ja) 1996-04-23
WO1995008284A1 (de) 1995-03-30
CA2149898A1 (en) 1995-03-30
DE59404723D1 (de) 1998-01-15
ATE160682T1 (de) 1997-12-15

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