EP0700651B1 - Nouvelle structure pour sièges de bureaux - Google Patents

Nouvelle structure pour sièges de bureaux Download PDF

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Publication number
EP0700651B1
EP0700651B1 EP94112645A EP94112645A EP0700651B1 EP 0700651 B1 EP0700651 B1 EP 0700651B1 EP 94112645 A EP94112645 A EP 94112645A EP 94112645 A EP94112645 A EP 94112645A EP 0700651 B1 EP0700651 B1 EP 0700651B1
Authority
EP
European Patent Office
Prior art keywords
seat
tilting
mobile
horizontal
assembly
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
EP94112645A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0700651A1 (fr
Inventor
Michel Lamart
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.)
Steelcase Strafor SA
Original Assignee
Steelcase Strafor SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41066324&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0700651(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Steelcase Strafor SA filed Critical Steelcase Strafor SA
Priority to ES94112645T priority Critical patent/ES2085178T3/es
Priority to DK94112645.0T priority patent/DK0700651T3/da
Priority to DE69400112T priority patent/DE69400112T2/de
Priority to EP94112645A priority patent/EP0700651B1/fr
Priority to AT94112645T priority patent/ATE135541T1/de
Priority to PCT/FR1995/001075 priority patent/WO1996004823A1/fr
Priority to JP8507071A priority patent/JPH10503947A/ja
Priority to AU31695/95A priority patent/AU3169595A/en
Publication of EP0700651A1 publication Critical patent/EP0700651A1/fr
Publication of EP0700651B1 publication Critical patent/EP0700651B1/fr
Application granted granted Critical
Priority to GR960401290T priority patent/GR3019914T3/el
Priority to US08/795,414 priority patent/US5755490A/en
Priority to HK98106474A priority patent/HK1007268A1/xx
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
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable 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
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs

Definitions

  • the present invention relates to a new structure for office chairs and the like, of the general type comprising, essentially, pivotally mounted front to rear on a vertical base column, a set, often made in a single piece, bringing together a generally horizontal seat and a generally vertical backrest.
  • a seat may or may not include armrests, and numerous variants have been proposed, so that it ensures the best comfort for the user, taking into account its size and position.
  • the structure according to the present invention represents both a simplification and an improvement to such prior embodiments.
  • a seat of the general type mentioned above means are provided for allowing the adjustment of said seat and said back, respectively in length and in height with respect to said tilting assembly, depending on the size and position of the user, to ensure the best comfort.
  • an office chair of the above type, comprising mounted tilting from front to back on a vertical base column, an assembly bringing together a seat of generally horizontal appearance and a generally vertical backrest, said seat comprising means for separately allowing the adjustment of said seat and of said backrest respectively in length and in height with respect to said assembly, according to the size and position of the user.
  • an office chair of the same type comprising, mounted tilting from front to back on a vertical base column, an assembly bringing together a seat of generally horizontal appearance and a generally vertical backrest, said seat comprising means for separately allowing the adjustment of said seat and of said backrest respectively in length and in height with respect to said assembly, according to the size and position of the user.
  • the present invention therefore relates to a seat of the same general type, but in which said adjustment means are simpler, more effective, and less costly to produce.
  • said adjustment means consist, for the backrest, in the combination of a pair of parallel slides, formed in said back portion of said tilting assembly, and corresponding plates projecting from the rear of said backrest, and for the seat portion, from the cooperation of guide plates of said movable seat portion with a transverse plate for reinforcing the horizontal portion of said tilting assembly.
  • said tilting assembly constitutes a single piece molded from plastic, and forming a hollow shell comprising a substantially horizontal wing open upwards and a substantially vertical wing open forwards, these two wings being connected by an angular zone. about 90 °, and each having side edges curved inward and in which slide respectively said movable portions forming the seat and the backrest.
  • the term “parallel” means that said slides are spaced apart by a constant distance, and can be both straight and curved. In the case where they are rectilinear, the plates have any length, but in the case where they are curved, the plates are either relatively flexible to conform constantly to the curvature of this curve, or relatively short, to follow said curvature without deformation.
  • the adjustment of the total length of the seat and the total height of the back therefore results from the degree of sliding forwards or backwards, and upwards and downwards, respectively, of the movable portions relative to the tilting assembly, considered fixed in this respect, although tilting relative to the base.
  • This sliding can be done by simple traction or thrust exerted in the desired direction on the mobile portion considered.
  • this portion should be locked in this position, for example by means of a pivoting eccentric cam controlled by a lever. This is particularly the case for the mobile portion of the seat.
  • the invention aims at a particularly simple and effective positive control.
  • a cursor in the "back" portion of the assembly, that is to say the fixed vertical outer face, a cursor can move along a substantially horizontal guide, while the end of this cursor projecting towards the interior passes through a slit made obliquely in the movable portion.
  • the latter exerts on said slot an action with a vertical component causing the vertical displacement of the movable portion, and blocking this displacement to any desired degree, or step by step, according to the profile of said slot.
  • the movement of the moving portions is guided essentially by the cooperation of the aforementioned adjustment means. It can be supplemented when the mobile portions have a certain volume, as will be explained below, by the guidance provided by the edges oriented towards the inside of the molded shell constituting the rocking assembly on the external surface, generally upholstered, mobile portions, to which they constitute an aesthetic framework.
  • the invention also relates to an additional improvement aimed at increasing the comfort of these seats. Indeed, at the time of the rearward tilting of the "fixed" seat / back assembly, the seat portion tends to rise, which can create some discomfort at the knees. To avoid this constraint, provision is made, according to the invention, to provide, in the movable portion of the seat, an anterior part maintained horizontal by sliding on an extension of the fixed base, by virtue of a zone of said movable portion forming a hinge. horizontal. Given the relatively small clearance due to tilting, said front part hardly lifts, whatever the degree of sliding of this movable portion of the seat.
  • said movable sliding portions of the seat and the back instead of being produced by injection or thermoforming as was the practice until now, which creates hard and uncomfortable parts, are produced by the technique known as extrusion - blowing, creating hollow volumes with relatively flexible walls, which it is possible to adapt in thickness so that these portions constitute real comfortable "cushions".
  • the amount of material used to produce such cushions is proportionally less important than for the solid parts obtained by injection, from which there results a substantial saving.
  • This assembly is pivotally mounted on the vertical column of a conventional base, which is not part of the invention.
  • the shell C is a single molded part which consists of a horizontal portion 1 and a vertical portion 2, shown here substantially perpendicular.
  • Each of the portions 1 and 2 has a bottom, respectively 1 'and 2', and rounded edges or wings, namely 3 for the horizontal portion 1 and 4 for the vertical portion 2.
  • the curvature of these wings is oriented towards the interior of the seat, and its thickness is adapted to the thickness of the seat A and of the backrest D in the "dressed" state, as explained in more detail below.
  • the bottom 1 ′ of the horizontal portion 1 of the shell C is fixed to the tilting element located at the top of the base column, this tilting element pivoting elastically around d 'a horizontal axis 5 ( Figures 3 and 6). Furthermore, on the upper part of said column are mounted a pair of fixed horizontal profiles 6 ( Figure 3) located at the front relative to the bottom 1 '.
  • the whole of the shell C can tilt backwards, as indicated in broken lines in FIG. 3, while the sections 6 remain horizontal.
  • the mobile seat A is adapted, as illustrated in FIGS. 4, 5 and 6.
  • This movable seat consists of a front portion 7 forming a "cushion" preferably obtained by the blowing extrusion technique, and of a rear portion 8, comprising lateral plates 9, and connected to the front portion 7 by a zone relatively thin 10, forming a hinge between the two.
  • a tab 11 having a series of lights 12 (FIG. 5), intended for adjusting the position of the seat A, by means of a stud 13 carried by a lever 14 pivotally mounted about a horizontal axis and can be operated from the outside by a button 15 ( Figures 1 'and 3).
  • the seat A is inserted in the horizontal portion 1 of the shell C as it appears in FIGS. 4 and 6, the guide plates 9 along the underside of the flanges 3 and the transverse reinforcement plate 16, and the front portion 7 being enveloped by said flanges 3, while the profiles 6 are housed in holes 17 provided in the thickness of said front portion 7, so that the thin zone 10 comes to be located approximately towards the front edge of the bottom 1 ′, according to the setting of seat A.
  • the seat A is therefore slidably mounted front to rear in the horizontal portion 1 of the shell C, the degree of this sliding dependent on that of the slots 12 in which the stud 13 is inserted, and the guidance of this sliding being ensured , on the rear part, by the edges 3 of the horizontal portion 1 of the shell C, and on the front part by the sliding of the profiles 6 in the holes 17.
  • the comfort of the user is ensured at the same time, whatever this degree of sliding forward or towards the rear, and whatever the degree of tilting of the shell C towards the rear, thanks to the thin zone 10 which ensures the transition between the horizontal part fixed by the profiles 6 and the tilting part, defined by the flanges 3.
  • the rearward stroke of the seat A is limited so as to leave a certain clearance 19 to allow the passage of the backrest D once dressed.
  • said backrest D is movable in height, independently of the seat A.
  • said folder D comprises an upper portion 20 and a lower portion 21.
  • the upper portion 20 is produced by blow molding in the form of a "cushion" whose shape corresponds to that of the edges 4 of the vertical portion 2 of the shell C, the lower portion 21, also produced by blow molding comprising, coming from molding projecting on its rear face, male parts or plates 22 sliding in corresponding grooves 23 of the front face of said vertical portion 2 of the shell C ( Figure 3).
  • the button 29 of the cursor 24, integral of the lug 25, has a vertical section in the shape of an inverted U, the bottom of which rests on the upper edge of said lower portion 28 and is guided by the lower edge of said upper portion 27, so that the cursor 24 cannot move only horizontally, that in this same horizontal movement, but that, during this same horizontal movement, the lug 25, exerting pressure on the upper or lower edge respectively of the groove 25 ', forces the backrest er D to be raised or lowered respectively, remaining guided vertically by the flanges 4 and the grooves 23.
  • the back D is intended to be "dressed", that is to say coated with a certain thickness of a decorative fabric. It's for this reason that the seat A is mounted in the horizontal portion 1 of the shell C with a certain clearance 19 at the rear (FIG. 4).
  • this system is applicable not only to chairs, as shown, but to armchairs having different arms or legs with tilting. It is also applicable to sled type seats, in which the seat is non-tilting, in which the hinge portion 10 (thin area) of part A is no longer useful.
  • the invention also relates, as an independent characteristic, to the height adjustment system of the backrest.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Graft Or Block Polymers (AREA)
  • Table Devices Or Equipment (AREA)
  • Laminated Bodies (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Hydrogenated Pyridines (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP94112645A 1994-08-12 1994-08-12 Nouvelle structure pour sièges de bureaux Expired - Lifetime EP0700651B1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ES94112645T ES2085178T3 (es) 1994-08-12 1994-08-12 Nueva estructura para asientos de oficina.
DK94112645.0T DK0700651T3 (da) 1994-08-12 1994-08-12 Ny kontorstolskonstruktion
DE69400112T DE69400112T2 (de) 1994-08-12 1994-08-12 Neue Struktur für Bürostühle
EP94112645A EP0700651B1 (fr) 1994-08-12 1994-08-12 Nouvelle structure pour sièges de bureaux
AT94112645T ATE135541T1 (de) 1994-08-12 1994-08-12 Neue struktur für bürostühle
JP8507071A JPH10503947A (ja) 1994-08-12 1995-08-10 新規な事務用椅子の構造
PCT/FR1995/001075 WO1996004823A1 (fr) 1994-08-12 1995-08-10 Nouvelle structure pour sieges de bureaux
AU31695/95A AU3169595A (en) 1994-08-12 1995-08-10 Novel office chair structure
GR960401290T GR3019914T3 (en) 1994-08-12 1996-05-15 Improved structure for office chairs
US08/795,414 US5755490A (en) 1994-08-12 1997-02-04 Office chair structure
HK98106474A HK1007268A1 (en) 1994-08-12 1998-06-24 Improved structure for office chairs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94112645A EP0700651B1 (fr) 1994-08-12 1994-08-12 Nouvelle structure pour sièges de bureaux

Publications (2)

Publication Number Publication Date
EP0700651A1 EP0700651A1 (fr) 1996-03-13
EP0700651B1 true EP0700651B1 (fr) 1996-03-20

Family

ID=41066324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112645A Expired - Lifetime EP0700651B1 (fr) 1994-08-12 1994-08-12 Nouvelle structure pour sièges de bureaux

Country Status (11)

Country Link
US (1) US5755490A (xx)
EP (1) EP0700651B1 (xx)
JP (1) JPH10503947A (xx)
AT (1) ATE135541T1 (xx)
AU (1) AU3169595A (xx)
DE (1) DE69400112T2 (xx)
DK (1) DK0700651T3 (xx)
ES (1) ES2085178T3 (xx)
GR (1) GR3019914T3 (xx)
HK (1) HK1007268A1 (xx)
WO (1) WO1996004823A1 (xx)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
US5765914A (en) * 1995-06-07 1998-06-16 Herman Miller, Inc. Chair with a tilt control mechanism
US6598936B1 (en) 2001-04-11 2003-07-29 Michael N. Klein Multi-task mid-pivot chair control mechanism
US6688692B2 (en) 2001-06-15 2004-02-10 Hon Technology Inc. Locking device for chair seat horizontal adjustment mechanism
US6634711B2 (en) * 2001-06-15 2003-10-21 Hon Technology Inc. Adjustable chair seat with locking mechanism
US6890030B2 (en) 2001-07-31 2005-05-10 Haworth, Inc. Chair having a seat with adjustable front edge
US6682143B2 (en) * 2002-02-21 2004-01-27 Evenflo Company, Inc. Booster seat
US7341233B2 (en) * 2003-09-19 2008-03-11 L & P Property Management Company Horizontal adjustment mechanism for use on a chair seat
US7396078B2 (en) * 2004-02-05 2008-07-08 Wenger Corporation Music posture chair
US7159942B2 (en) * 2004-08-26 2007-01-09 L & P Property Management Company Seat slide adjustment mechanism
US7478880B2 (en) 2005-03-08 2009-01-20 L&P Property Management Company Multi-purpose adjustment chair mechanism
US7669935B2 (en) * 2005-11-14 2010-03-02 Michael John Crossley Protective chair
CN102772051B (zh) 2007-01-29 2016-05-18 赫尔曼米勒有限公司 座位结构及其使用方法
US8015981B2 (en) * 2007-08-19 2011-09-13 Anastasia Soare Stencils and gauging device for aesthetically pleasing eyebrow shaping
US20130062920A1 (en) * 2011-09-14 2013-03-14 Ron McDiarmid Chair with inflatable bladder system
USD697726S1 (en) 2012-09-20 2014-01-21 Steelcase Inc. Chair
US9380879B2 (en) 2014-02-24 2016-07-05 Knoll, Inc. Chair back swivel mechanism
US11589678B2 (en) 2019-01-17 2023-02-28 Hni Technologies Inc. Chairs including flexible frames
JP1660105S (xx) * 2019-07-11 2020-05-25
USD912422S1 (en) * 2019-12-05 2021-03-09 39F Usa Inc Chair

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Also Published As

Publication number Publication date
DK0700651T3 (da) 1996-08-19
JPH10503947A (ja) 1998-04-14
GR3019914T3 (en) 1996-08-31
ATE135541T1 (de) 1996-04-15
DE69400112D1 (de) 1996-05-23
ES2085178T3 (es) 1996-05-16
DE69400112T2 (de) 1996-10-24
HK1007268A1 (en) 1999-04-09
AU3169595A (en) 1996-03-07
EP0700651A1 (fr) 1996-03-13
US5755490A (en) 1998-05-26
WO1996004823A1 (fr) 1996-02-22

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