EP0784952A1 - Chaise, notamment chaise de bureau - Google Patents

Chaise, notamment chaise de bureau Download PDF

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Publication number
EP0784952A1
EP0784952A1 EP97100566A EP97100566A EP0784952A1 EP 0784952 A1 EP0784952 A1 EP 0784952A1 EP 97100566 A EP97100566 A EP 97100566A EP 97100566 A EP97100566 A EP 97100566A EP 0784952 A1 EP0784952 A1 EP 0784952A1
Authority
EP
European Patent Office
Prior art keywords
backrest
seat
guide
joint
chair
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.)
Granted
Application number
EP97100566A
Other languages
German (de)
English (en)
Other versions
EP0784952B1 (fr
Inventor
Peter Horn
Armin Sander
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.)
ITO DESIGN ARMIN SANDER
Original Assignee
Grammer 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 Grammer AG filed Critical Grammer AG
Publication of EP0784952A1 publication Critical patent/EP0784952A1/fr
Application granted granted Critical
Publication of EP0784952B1 publication Critical patent/EP0784952B1/fr
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
    • A47C1/031—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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • 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

Definitions

  • the present invention relates to a chair, in particular office chair, with the features of the preamble of claim 1.
  • the backrest of these known, generic chairs can be tilted.
  • the backrest tilt is continuously adjustable and can also be locked in one or more tilted positions.
  • the seat is also adjustable.
  • the inclination adjustment of the seat surface is carried out with the aid of a synchronous mechanism which is kinematically coupled to the backrest pivoting mechanism and controls the seat surface inclination mechanism.
  • the rear region of the seat adjacent to the backrest tilts downward about a pivot point arranged behind the front edge of the seat surface and below the seat surface. Because of this arrangement of the swivel joint, the front region of the seat surface facing away from the backrest rises. The seat is therefore pivoted a certain distance around the swivel joint arranged in the region of the front edge.
  • the object of the invention is to improve the generic chairs, in particular office chairs, with regard to their synchronous mechanism. This object is achieved by the combination of features of claim 1.
  • the invention is based on the anatomical finding that the torso is pivoted relative to the thighs by means of the hip joint. It would therefore be obvious to arrange a swivel joint as a backrest swivel mechanism in line with the axis of rotation of the hip joint. Such an arrangement is known, for example, from that under the label Aeron TM office chair from Herman Miller.
  • the basic idea of the invention is to design the synchronous mechanism as a coupling gear with four links.
  • Such coupling gears are known, for example, from W. Krause, construction elements of precision mechanics, 2nd edition, Carl Hanser Verlag, ISBN 3-446-16530-4, p. 724 ".
  • a four-swivel chain is used here, the swivel associated with the hip joint being used by using a push crank chain (see W. Krause loc. Cit., Table 13.11.2) is substituted by a pushrod, which to a certain extent creates a pushrod below the hip joint of the person sitting there virtual hip joint "in the synchronous mechanism.
  • the sliding joint couples the seat surface or the seat inclination mechanism directly to the backrest or backrest pivoting mechanism.
  • the virtual pivot point of the sliding joint is approximately congruent with the swivel joint of the hip joint.
  • the transmission ratio between backrest and seat is 2: 1 to 3: 1.
  • the attachment of the virtual joint also ensures a constant height of the ankle and thus prevents the soles of the feet from lifting off the floor.
  • the angle described by the calf and thigh in the knee joint either remains constant or is increased with increasing backrest inclination.
  • Claim 2 relates to the advantageous use of a four-link coupling gear.
  • This four-link coupling gearbox is simple in its construction and meets all kinematic requirements for the construction.
  • Claims 3 and 4 relate to advantageous configurations of both the backrest pivoting mechanism and the seat inclination mechanism.
  • the structure of both mechanisms is structurally simple and, in addition, they can easily be combined to form a sliding crank chain.
  • Claim 5 relates to an advantageous embodiment of the sliding joint.
  • the large guide surfaces promote a low-play and safe function of the push joint.
  • Claims 6 and 7 relate to an alternative embodiment of the sliding joint.
  • Claim 8 relates to a structurally simple configuration of the reset mechanism both for the backrest pivoting mechanism and for the seat inclination mechanism.
  • the inventive chair consists essentially of the backrest 1, the seat 2 and the bogie 3.
  • the bogie 3 consists of a frame base 4 with five star-shaped arms 5. At the outer end of each arm 5, a roller 6 is attached. With the help of the rollers 6, the chair can be moved anywhere on the floor.
  • the frame stand 8 projects from the frame base 4 in the direction of the vertical main axis of the chair (axial direction 7). The frame stand 8 supports the seat 2 and the backrest 1.
  • the backrest 1 In its upright inclined position, the backrest 1 is essentially in the plane spanned by the axial direction 7 and the transverse direction 9 extending at right angles to the axial direction 7. In its upright inclination position, the seat surface 2 extends in the plane spanned by the transverse direction 9 and the longitudinal direction 10 extending at right angles to both the transverse direction 9 and the axial direction 7. Both the seat 2 and the backrest 1 are mounted on the frame stand 8 with the interposition of the synchronous mechanism. To support the backrest 1, the two backrest levers 11 are fixedly connected to the backrest 1 with their backrest free ends 12 in the exemplary embodiment shown.
  • the backrest levers 11 extend in the longitudinal direction 10 and are connected to one another by their lever-free ends 13 facing away from the backrest ends 12 by means of a lever shaft 14 extending in the transverse direction 9.
  • the lever shaft 14 is an element of a backrest hinge 15 fixed to the frame stand 8.
  • the backrest 1 is consequently mounted on the backrest hinge 15 by means of the backrest lever 11 and by means of the backrest hinge 15 relative to the frame stand 8 in the one shown in FIGS. 2 and 3, of which Longitudinal direction 10 and the axial direction 7 spanned plane pivotable.
  • the pivot arrow 16 indicates this schematically in FIGS. 2 and 3.
  • the seat surface 2 is mounted on the frame stand 8 by means of a seat swivel joint 17 adjacent to the backrest swivel joint 15 in the longitudinal direction 10.
  • the seat 2 rests on a seat stool.
  • the seat surface stool is pivotally mounted on a seat surface link 19 by means of a pivot hinge 18.
  • the link shaft 20 is here an element of the pair of elements forming the seat swivel 17.
  • the pivot joints 18 are arranged. Both seat link 19 are connected by means of the pivot stirrups 18 to one seat stool each.
  • the inclination adjustment of the seat surface 2 takes place by an up and down movement of the seat surface link 19 in the plane spanned by the longitudinal direction 10 and the axial direction 7. This inclination movement of the seat surface 2 is indicated graphically by the inclination arrow 21.
  • the link between the backrest swivel mechanism consisting essentially of the backrest levers 11 and the backrest pivot joint 15 and the seat inclination mechanism consisting essentially of the seat surface link 19, the bolster pivot joint 18 and the seat pivot joint 17 is formed by the thrust joint 22 designed as a prismatic thrust guide Fig. 1, Fig. 2, Fig. 3 and Fig. 4 illustrated embodiment of an arcuate prism slide guide.
  • This prismatic slide guide consists of a double-articulated arch.
  • a portion of the backrest lever 11 is designed as a bowl-like guide pan 23 for this purpose.
  • the arcuate guide stool 25 which at the same time forms the seat surface stool, is slidably supported in the pivoting direction 24.
  • the arcuate guide socket 23 and the arcuate guide stool 25 consequently form the double-articulated arch according to claim 5 Stool pivot 18 with connected to the seat link 19.
  • the arm 26 and the seat link 25 thus form the pair of elements forming the pivot hinge 18.
  • the lumbar region 28 therefore does not change its relative position in relation to the backrest 1 in the lumbar region, which on the one hand favors an ergonomically correct sitting and on the other hand prevents the shirt pull-out effect described at the beginning.
  • the arcuate guide socket 23 is replaced by two slot-like guide links 40 which are arranged on a virtual curved line.
  • the guide links 40 are firmly connected to one another by means of the longitudinal rod 41.
  • the backrest lever 11 pivotably mounted on the backrest pivot joint 15 thus consists of two partial backrest levers 11, two intermediate guide links 40 and a longitudinal bar 41 connecting the guide links 40 to one another.
  • the seat surface stool is formed by two axial bars 42 formed on the underside of the seat surface.
  • the axial spars 42 carry the guide bolts 43 which extend in the transverse direction 9.
  • the inclination of the seat surface 2 can be adjusted by displacing the guide bolts 43 in the guide link 40.
  • the guide pins 43 are positively guided by a relative pivoting of the guide links 40 as a result of the pivoting of the backrest lever 11 around the backrest pivot joint 15 when the trunk 38 is leaning back shown.
  • the invention is based on the basic idea of arranging a hinge joint 44 running in line with the hip joint 37 in the region of the hip joint 37. According to the invention, this hinge joint 44 is substituted by the thrust joint 22, the lever extension 45 assigned to the backrest lever 11 and the boom extension 46 assigned to the arm 26 being eliminated in the invention.
  • the substitution of the hinge joint 44, the lever extension 45 and the extension arm 46 by the Slide joint 22 effects a virtual hinge joint of the chair in the area of the hip joint 37.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP97100566A 1996-01-18 1997-01-16 Chaise, notamment chaise de bureau Expired - Lifetime EP0784952B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29600821U DE29600821U1 (de) 1996-01-18 1996-01-18 Stuhl, insbesondere Bürostuhl
DE29600821U 1996-01-18

Publications (2)

Publication Number Publication Date
EP0784952A1 true EP0784952A1 (fr) 1997-07-23
EP0784952B1 EP0784952B1 (fr) 2000-03-01

Family

ID=8018212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97100566A Expired - Lifetime EP0784952B1 (fr) 1996-01-18 1997-01-16 Chaise, notamment chaise de bureau

Country Status (2)

Country Link
EP (1) EP0784952B1 (fr)
DE (2) DE29600821U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10121227C1 (de) * 2001-04-30 2002-09-05 Klaus Seeliger Rückenlehnen- und Sitzflächen-Mechanismus, insbesondere für Fahrzeugsitze
US6644741B2 (en) 2001-09-20 2003-11-11 Haworth, Inc. Chair
US6945602B2 (en) 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for chair

Families Citing this family (1)

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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844102A1 (de) * 1988-12-28 1990-07-05 Sondergeld Horst Dipl Designer Sitz fuer einen buerostuhl od. dgl.
GB2271053A (en) * 1992-09-30 1994-04-06 Edward L Stulik Reclining chair
DE9300997U1 (de) * 1993-01-26 1994-05-26 Sondergeld Horst Verstellbarer Sitz

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4209049C2 (de) * 1992-03-20 1995-05-11 Kloeber Gmbh & Co Arbeitssessel mit flachbauender Synchronmechanik
DE4331987A1 (de) * 1993-09-21 1995-03-23 Fredi Dubach Stuhl, insbesondere Bürostuhl

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844102A1 (de) * 1988-12-28 1990-07-05 Sondergeld Horst Dipl Designer Sitz fuer einen buerostuhl od. dgl.
GB2271053A (en) * 1992-09-30 1994-04-06 Edward L Stulik Reclining chair
DE9300997U1 (de) * 1993-01-26 1994-05-26 Sondergeld Horst Verstellbarer Sitz

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10121227C1 (de) * 2001-04-30 2002-09-05 Klaus Seeliger Rückenlehnen- und Sitzflächen-Mechanismus, insbesondere für Fahrzeugsitze
US6644741B2 (en) 2001-09-20 2003-11-11 Haworth, Inc. Chair
US6945602B2 (en) 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for chair

Also Published As

Publication number Publication date
EP0784952B1 (fr) 2000-03-01
DE29600821U1 (de) 1997-05-28
DE59701156D1 (de) 2000-04-06

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