WO1995012338A1 - A working chair with synchronous seat and back adjustment - Google Patents

A working chair with synchronous seat and back adjustment Download PDF

Info

Publication number
WO1995012338A1
WO1995012338A1 PCT/DK1994/000395 DK9400395W WO9512338A1 WO 1995012338 A1 WO1995012338 A1 WO 1995012338A1 DK 9400395 W DK9400395 W DK 9400395W WO 9512338 A1 WO9512338 A1 WO 9512338A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
carrier frame
inclining
backwards
angle
Prior art date
Application number
PCT/DK1994/000395
Other languages
English (en)
French (fr)
Inventor
Willi Hensel
Original Assignee
Labofa A/S
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
Priority claimed from DK123393A external-priority patent/DK123393A/da
Priority claimed from DK123293A external-priority patent/DK123293D0/da
Priority to DK94931517T priority Critical patent/DK0726723T3/da
Priority to AU80574/94A priority patent/AU674801C/en
Priority to JP7512967A priority patent/JPH09504218A/ja
Priority to US08/591,599 priority patent/US6431649B1/en
Application filed by Labofa A/S filed Critical Labofa A/S
Priority to KR1019960702240A priority patent/KR960705494A/ko
Priority to EP94931517A priority patent/EP0726723B1/en
Priority to DE69414878T priority patent/DE69414878T2/de
Publication of WO1995012338A1 publication Critical patent/WO1995012338A1/en
Priority to NO961648A priority patent/NO961648D0/no
Priority to FI961845A priority patent/FI961845A/fi

Links

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
    • 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
    • A47C1/03255—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 invention relates to a working chair with a seat, a back and a lower frame, of which the frame com- prises a supporting pillar adjustable as to height and a carrier frame connected with the upper end of said pillar, the seat being pivotally connected with said carrier frame in the proximity of its front edge by a first pivot connection with a horizontal axis of rotation whereas a mounting arm in firm connection with a back support connected with the back is pivotally connected with the carrier frame as well as with the seat by a second pivot connection having axes of rotation mutually parallel and parallel with the axis of said first pivot connection, said pivot connections being designed for synchronous movement of the seat and the back, whereby the seat from a backwards inclining extreme position by rotation in said first pivot connection may be moved to a forwards inclining extreme position and the back synchronously therewith may be moved from a backwards inclining extreme position in which it forms a maximum angle with the seat towards a more upright position while gradually reducing its angle with the seat.
  • a continuous diminishing of the seat-back angle is effected through ⁇ out the range of adjustment of the seat from the back ⁇ wards inclining rest position to the forwards inclining supporting position, so that said angle in the forwards inclining extreme position of the seat is smaller than in the neutral position of the chair, in which the seat plane is substantially horizontal.
  • the Applicant has further developed a chair with a design of the synchron ⁇ ous mechanism which causes that the seat-back angle during the adjustment movement assumes its minimum value in the proximity of said neutral position with substan- tially horizontal seat plane, but increases again from said minimum value while continuously adjusting the seat towards the forwards inclining extreme position.
  • the object of the invention is to provide a further development of a synchronous chair with the last mentioned usefully advantageous variation of the seat- back angle during the adjustment movement so that an automatical setting of the seat depth is effected as well so that this increases at forwards as well as at backwards inclination of the seat.
  • said first pivot connection is provided to allow a substantially translatory movement of the seat perpen ⁇ dicular to the axis of rotation so that the front edge of the seat in said forwards and backwards inclining extreme positions is displaced forwards/upwards and backwards/downwards, respectively, in relation to the carrier frame.
  • a compara ⁇ tively simple adjustment mechanism may according to a further development of the invention be provided for simultaneous adjustment of the seat depth and the back height of the chair in that the back support comprises two substantially rectilinear parts forming an obtuse angle with each other, one of said parts being substan- tially vertical and connected with the back whereas the other is mounted in a back support holder positioned under the seat and connected with the carrier frame in such a manner that by means of an arrestable operating element it may be displaced in its longitudinal direc- tion and maintained in various adjustments in said back support holder for simultaneous adjustment of the seat depth and the height adjustment of the back in relation to the seat.
  • FIG. 1 shows a schematical side view of a compara ⁇ tively simple embodiment
  • Figs 2 and 3 are schematical side views of an embodiment with increased area of adjustment of the seat angle in a neutral position and in two extreme positions of the seat inclination, respectively,
  • Fig. 4 is a graphic illustration of the variation of the seat back angle as a function of the angular position of the seat
  • Fig. 5 is a side view of a modification of the embodiment shown in Figs 2 and 3 with a further adjust ⁇ ment mechanism for simultaneous adjustment of the seat depth and back height, and
  • Fig.6 is a section along the line VI-VI in Fig. 5.
  • a carrier frame 1 constitutes part of the lower frame of the chair, in that it is connected in a known manner with the upper end of a height-adjustable supporting pillar, not shown.
  • the seat 2 In the proximity of its front edge the seat 2 is pivotally connected with the carrier frame 1 by a first pivot connection 3.
  • the back 4 of the chair is mounted dis- placeably as to height on a back support 5 with a lower part 6 placed under the seat 2 which at its forward end is firmly connected with a mounting arm 7.
  • the mounting arm 7 is pivotally connected with the carrier frame 1 by a second pivot connection 8 and, in its central area, pivotally connected with the seat 2 by a third pivot connection 9.
  • Said pivot connections 3, 8 and 9 have horizontal mutually parallel axes of rotation and allow a synchron ⁇ ous adjustment movement of the seat 2 and the back 4 so that the seat 2 from a backwards inclining extreme position may be moved through a neutral position in which the seat plane is substantially horizontal to a forwards inclining extreme position and synchronously therewith the back may be moved from a backwards inclining extreme position in which it forms a maximum angle with the seat towards a more erect position while gradually reducing its angle with the seat.
  • the first pivot connec ⁇ tion 3 is formed so that during the synchronous adjust ⁇ ing movement of the seat and back it allows a simulta ⁇ neous, substantially translatory movement of the seat 2 perpendicular to the axis of rotation of the support ⁇ ing pillar not shown of the chair, so that the front edge of the seat in the forwards inclining extreme position is displaced forwards and upwards in relation to the carrier frame 1 and in the backwards inclining extreme position is displaced backwards and downwards in relation to the carrier frame 1.
  • the first pivot connection 3 comprises in the embodiment shown in Fig.l a pivot pin 3a which is firmly mounted on the carrier frame 1 and is pivotally arranged and translato- rily displaceable in a track 3b which is formed in connection with the support of the seat 2, e.g. in a flange portion connected therewith.
  • the track 3b may as shown be substantially recti ⁇ linear and directed obliquely upwards towards the front edge of the seat so that it for instance forms an angle of about 55° with the vertical axis of the supporting pillar not shown of the chair.
  • Fig.l a pivot pin 3a which is firmly mounted on the carrier frame 1 and is pivotally arranged and translato- rily displaceable in a track 3b which is formed in connection with the support of the seat 2, e.g. in a flange portion connected therewith.
  • the track 3b may as shown be substantially recti ⁇ linear and directed obliquely upwards towards the front edge of the seat so that it for instance forms
  • the variation range of the angle of the seat 2 with horizontal may typically extend from about -7° to about +3° while the accompany ⁇ ing adjustment area of the angle of the back 4 with the seat typically extends from a value of up to 15° larger than the seat back angle in the neutral position with substantially horizontal seat plane to a value corre ⁇ sponding to the angle in the neutral position which typically amounts to about 98°.
  • the variation area of the seat inclination is, on one hand, increased through a modified design of the pivot connections between the carrier frame 11 and the seat 12, and, on the other hand, the back support 15 connected with the back 14.
  • the first pivot connection 13 between the carrier frame 11 and the seat 12 in the proximity of its front edge may be designed in the same manner as in the embodiment in Fig. 1 and include a pivot pin 13a firmly mounted in the carrier frame 11 in translatorily displaceable engagement with a track 13b in connection with the seat 12.
  • the lower part 16 of the back support 15 positioned under the seat 12 is connected with the carrier frame 11 through two mounting arms 17 an 18 one mounting arm 17 comprising two mutually pivotally arm portions 17a and 17b of which arm portion 17a at its front end is pivotally connected with the carrier frame 11 in a pivot connection 19, whereas the second part 17b of the arm 17 is firmly connected with the back support 15 at the front end thereof.
  • the arm 17 is further by a pivot connection 21 pivotally connected with the seat 12, in that the pivot connection may comprise a pivot pin 21a connected with the seat and journalled in journals 21b in each of the arm parts 17a and 17b.
  • the other arm 18 is at its front end connected with the carrier frame 11 by a pivot connection 20 and at its rearwards end it is pivotally connected with the arm part 17b by a pivot connection 22.
  • the variation range of the seat inclination will be increased so that the seat angle with horizontal in the backwards and forwards inclining extreme positions e.g. will be -10° and + 10°, respecti ⁇ vely.
  • the variation area may e.g. as sown in Fig 4 extend from a value which in the backwards inclining extreme position is about 7° larger than the seat-back angle in the neutral position and in the forwards inclining extreme position is increased by 3° larger.
  • the two members 15 and 16 of the back support may as shown in Fig.5, be substantially rectilinear and form an obtuse angle V.
  • the lower part 16 positioned under the seat is mounted in a back support holder 23 connected with the mounting arms 17 and 18, so that by means of an arrestable operating member it may be displaced in its longitudinal direction shown by the arrows A-A in the holder 23 and maintained in various adjustments in relation thereto.
  • the longitudinally displaceable and arrestable mounting of the back support holder 16 in holder 23 is in the illustrated embodiment provided in that the back support part 16 is formed with an elongated rack member 24 which is in engagement with a toothed wheel 25 mounted in the back support holder 23.
  • the toothed wheel 25 By turning the toothed wheel 25 clockwise the rack member 24 and the back support 16 will thus be displaced in the forwards direction whereby the seat depth will be reduced.
  • rotation of the wheel 25 counterclockwise will cause a backwards displacement of the rack member 24 and the back 14, thereby increasing the seat depth.
  • the arrestability of the engagement between the rack member 24 and the toothed wheel 25 may as shown in Fig. 6 be obtained by means of a releasable spring- biassed coupling, e.g.
  • an intermediate wheel 30 may be inserted between the toothed wheel 25 and the clutch 26.
  • the obtuse angle V between the two back support parts 15 and 16 may in dependence on the other possibil ⁇ ities of adjustment of the chair vary between about 100° and about 120°.
  • An advantageous size of the angle V is in practice 110°.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Special Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Exchange Systems With Centralized Control (AREA)
PCT/DK1994/000395 1993-11-01 1994-10-27 A working chair with synchronous seat and back adjustment WO1995012338A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE69414878T DE69414878T2 (de) 1993-11-01 1994-10-27 Bürostuhl mit synchroner verstellung von sitz und rückenlehne
EP94931517A EP0726723B1 (en) 1993-11-01 1994-10-27 A working chair with synchronous seat and back adjustment
AU80574/94A AU674801C (en) 1993-11-01 1994-10-27 A working chair with synchronous seat and back adjustment
JP7512967A JPH09504218A (ja) 1993-11-01 1994-10-27 座部および背もたれ同期調節装置を有する作業用椅子
US08/591,599 US6431649B1 (en) 1993-11-01 1994-10-27 Working chair with synchronous seat and back adjustment
DK94931517T DK0726723T3 (da) 1993-11-01 1994-10-27 Arbejdsstol med synkron sæde- og rygindstilling
KR1019960702240A KR960705494A (ko) 1993-11-01 1994-10-27 동기식(synchronous) 좌석 및 등받이 조절부를 갖는 작업의자(A WORKING CHAIR WITH SYNCHRONOUS SEAT AND BACK ADJUSTMENT)
NO961648A NO961648D0 (no) 1993-11-01 1996-04-25 Arbeidsstol med synkron innstilling av sete og rygg
FI961845A FI961845A (fi) 1993-11-01 1996-04-30 Työtuoli, jossa on synkroninen istuimen ja selkänojan säätö

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK123393A DK123393A (da) 1993-11-01 1993-11-01 Arbejdsstol med synkron sæde-rygindstilling
DK123293A DK123293D0 (da) 1993-11-01 1993-11-01 Arbejdsstol med kombineret saededybde- og hoejderegulering
DK1233/93 1993-11-01
DK1232/93 1993-11-01

Publications (1)

Publication Number Publication Date
WO1995012338A1 true WO1995012338A1 (en) 1995-05-11

Family

ID=26065429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1994/000395 WO1995012338A1 (en) 1993-11-01 1994-10-27 A working chair with synchronous seat and back adjustment

Country Status (11)

Country Link
US (1) US6431649B1 (da)
EP (1) EP0726723B1 (da)
JP (1) JPH09504218A (da)
KR (1) KR960705494A (da)
AT (1) ATE173591T1 (da)
CA (1) CA2174511A1 (da)
DE (1) DE69414878T2 (da)
DK (1) DK0726723T3 (da)
FI (1) FI961845A (da)
NO (1) NO961648D0 (da)
WO (1) WO1995012338A1 (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1868467B1 (de) * 2005-04-13 2014-12-17 Bock 1 GmbH & Co. KG Vorrichtung zur sitzneigeverstellung eines stuhles
ITUA20164261A1 (it) * 2016-06-10 2017-12-10 Co Fe Mo Ind S R L Sistema di articolazione per sedie

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CA2302063C (en) * 2000-03-23 2010-08-17 Cke Technologies Inc. Ergonomic chair
ATE287229T1 (de) * 2000-03-24 2005-02-15 Giroflex Entwicklungs Ag Sitz- und rückenlehnenanordnung bei sitzmöbeln, insbesondere bürostühlen
DE10048783A1 (de) * 2000-09-29 2002-05-29 Stoll Sedus Ag Stuhl mit neigbarem Sitz
DE10122948C1 (de) * 2001-05-11 2003-03-13 Armin Sander Stuhl, insbesondere Bürostuhl
DE10122946C1 (de) * 2001-05-11 2003-01-30 Armin Sander Stuhl, insbesondere Bürostuhl
DE10125994A1 (de) * 2001-05-18 2002-11-21 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
US6890030B2 (en) * 2001-07-31 2005-05-10 Haworth, Inc. Chair having a seat with adjustable front edge
US6644741B2 (en) * 2001-09-20 2003-11-11 Haworth, Inc. Chair
AUPR869101A0 (en) * 2001-11-06 2001-11-29 Frisina, Matthew Stephen Aquatic seat
US6811218B2 (en) * 2001-12-14 2004-11-02 Kimball International, Inc. Chair with conforming seat
US6805322B2 (en) * 2002-08-15 2004-10-19 The Boeing Company Multiple-position seat
US6945602B2 (en) * 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for chair
US7461774B2 (en) * 2004-09-10 2008-12-09 Advantage Branch & Office Systems, Llc Customer interaction process and system
GB2421429A (en) * 2004-12-23 2006-06-28 James Robert Farrell Seat with downward angled seating surface
US20060138833A1 (en) * 2004-12-29 2006-06-29 Kerry Brodrecht Chair control for synchronized movement of chair seat and back, and chair having same
DE202005006980U1 (de) * 2005-04-28 2006-09-07 Bock 1 Gmbh & Co. Kg Sitzmöbel, insbesondere Bürostuhl
US7806478B1 (en) * 2006-01-04 2010-10-05 Sava Cvek Task chair with dual tilting capabilities
ATE422315T1 (de) * 2006-10-06 2009-02-15 Stoll Giroflex Ag Synchron-bürostuhl
DE102006047889B4 (de) * 2006-10-10 2008-10-23 Interstuhl Büromöbel GmbH & Co. KG Sitzmöbel, insbesondere Bürostuhl
DE102006049676B4 (de) * 2006-10-18 2008-12-11 Sedus Stoll Ag Stuhl mit neigbarem Sitz
ITTO20070398A1 (it) * 2007-06-06 2008-12-07 Malenotti S R L "sedia con schienale oscillante"
KR100968540B1 (ko) * 2008-03-27 2010-07-08 듀오백코리아 주식회사 의자의 슬라이딩 방식 틸팅 장치
KR100968547B1 (ko) * 2008-03-27 2010-07-08 듀오백코리아 주식회사 의자의 틸팅 장치
US8646839B2 (en) * 2008-06-17 2014-02-11 Co.Fe.Mo. Industrie S.R.L. Adjustment device for chairs
KR100903215B1 (ko) * 2008-10-10 2009-06-18 주식회사 시디즈 틸팅 가능 의자
JP5433832B2 (ja) * 2008-11-25 2014-03-05 有限会社ビューティフルライフ 椅子
US8944507B2 (en) * 2009-10-13 2015-02-03 Herman Miller, Inc. Ergonomic adjustable chair mechanisms
US20110304192A1 (en) * 2010-06-15 2011-12-15 Augustat Betty A Ergometric Chair Apparatus
JP2012070787A (ja) * 2010-09-27 2012-04-12 Panasonic Corp 椅子式マッサージ機
US20130207427A1 (en) * 2010-10-19 2013-08-15 Okamura Corporation Chair with armrest
IT1403471B1 (it) * 2010-12-03 2013-10-17 Imarc Spa Meccanismo per sedie da ufficio provvisto di dispositivo di regolazione della forza di oscillazione.
DE102011010099A1 (de) * 2011-02-01 2012-08-02 Bock 1 Gmbh & Co. Kg Synchronmechanik
DE102011001811A1 (de) * 2011-04-05 2012-10-11 Wilkhahn Wilkening + Hahne Gmbh + Co. Kg Stuhl
USD697726S1 (en) 2012-09-20 2014-01-21 Steelcase Inc. Chair
US9706845B2 (en) 2012-09-20 2017-07-18 Steelcase Inc. Chair assembly
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
JP6150597B2 (ja) * 2013-04-19 2017-06-21 コイト電工株式会社 座席装置
CN106455821A (zh) 2014-04-17 2017-02-22 Hni技术公司 椅子和椅子控制组件、系统和方法
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
CN107708491B (zh) 2015-04-13 2022-02-22 斯迪尔科斯公司 座位布置
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
WO2023086245A1 (en) * 2021-11-09 2023-05-19 Steelcase Inc. Tilt control system for a chair

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US3720443A (en) * 1970-04-27 1973-03-13 Modern Tube Sa Seats
EP0418731A1 (de) * 1989-09-16 1991-03-27 Rolf Völkle Sessel

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US4854641A (en) * 1989-01-23 1989-08-08 Reineman Richard G Adjustable chair
DE3916474A1 (de) * 1989-05-20 1990-11-22 Roeder Soehne Sitzmoebelfab Stuhl, insbesondere arbeits- oder buerostuhl
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US3720443A (en) * 1970-04-27 1973-03-13 Modern Tube Sa Seats
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EP0418731A1 (de) * 1989-09-16 1991-03-27 Rolf Völkle Sessel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1868467B1 (de) * 2005-04-13 2014-12-17 Bock 1 GmbH & Co. KG Vorrichtung zur sitzneigeverstellung eines stuhles
ITUA20164261A1 (it) * 2016-06-10 2017-12-10 Co Fe Mo Ind S R L Sistema di articolazione per sedie
WO2017212361A1 (en) * 2016-06-10 2017-12-14 Co.Fe.Mo. Industrie S.R.L. Articulation system for chairs
EP3468416B1 (en) * 2016-06-10 2021-06-09 CO.FE.MO. Industrie S.R.L. Articulation system for chairs
EP3903642A1 (en) * 2016-06-10 2021-11-03 CO.FE.MO. Industrie S.R.L. Articulation system for chairs

Also Published As

Publication number Publication date
AU674801B2 (en) 1997-01-09
ATE173591T1 (de) 1998-12-15
AU8057494A (en) 1995-05-23
CA2174511A1 (en) 1995-05-11
EP0726723B1 (en) 1998-11-25
DE69414878T2 (de) 1999-06-24
NO961648L (no) 1996-04-25
DE69414878D1 (de) 1999-01-07
EP0726723A1 (en) 1996-08-21
DK0726723T3 (da) 1999-08-09
FI961845A0 (fi) 1996-04-30
FI961845A (fi) 1996-04-30
NO961648D0 (no) 1996-04-25
US6431649B1 (en) 2002-08-13
JPH09504218A (ja) 1997-04-28
KR960705494A (ko) 1996-11-08

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