EP2298131A1 - Seating furniture with seat depth adjustment - Google Patents

Seating furniture with seat depth adjustment Download PDF

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Publication number
EP2298131A1
EP2298131A1 EP09011823A EP09011823A EP2298131A1 EP 2298131 A1 EP2298131 A1 EP 2298131A1 EP 09011823 A EP09011823 A EP 09011823A EP 09011823 A EP09011823 A EP 09011823A EP 2298131 A1 EP2298131 A1 EP 2298131A1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest frame
lumbar support
support
seating furniture
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
EP09011823A
Other languages
German (de)
French (fr)
Other versions
EP2298131B1 (en
Inventor
Mark Dipl. Ing. Wiese
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.)
HAWORTH GmbH
Original Assignee
HAWORTH GmbH
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 HAWORTH GmbH filed Critical HAWORTH GmbH
Priority to EP09011823.3A priority Critical patent/EP2298131B1/en
Publication of EP2298131A1 publication Critical patent/EP2298131A1/en
Application granted granted Critical
Publication of EP2298131B1 publication Critical patent/EP2298131B1/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/46Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/022Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023Reclining 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
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255Reclining 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

Abstract

The furniture item has a seat that is displaceable relative to a backrest frame (7) for changing seat depth by a lower backrest frame (17) that is connected at a rear part of the seat and mounted pivotably on the backrest frame. A lumbar support carrier is fastened at an end to the backrest frame and at another end to the lower backrest frame. The lumbar support carrier includes a transverse carrier (21) and a longitudinal carrier (23) that is connected to the transverse carrier and to the lower backrest frame, where a lumbar support (15) is displaceably mounted on the longitudinal carrier.

Description

  • The invention relates to a chair, in particular chair, with seat depth adjustment according to the preamble of patent claim 1.
  • Such seating, in which the seat is slidably mounted for adaptation to the leg length of the seated person, are well known. However, this results in the problem that in at least one extreme position of the seat, a horizontal gap is formed to frame parts of the chair, which can affect the comfort or in which objects can jam.
  • Although one could think of designing the seat itself in two parts and displaceable in itself, but this disturbs the overall picture and also affects the seating comfort.
  • From the DE 201 08 172 U1 is a chair with adjustable backrest for adjusting the seat depth known. In this known chair, the backrest is mounted on a pivotable carrier. However, this solution is relatively expensive and hardly usable with so-called synchronous mechanisms.
  • In contrast, the present invention seeks to provide a chair of the type mentioned, in which the seating comfort is not impaired, which is characterized by a simple structure and is also suitable for use with synchronous mechanisms.
  • The solution of this object is achieved by a chair with the features of claim 1; the dependent claims relate to advantageous developments of the invention.
  • According to the invention it is proposed to attach to the backrest frame a pivotable backrest subframe which is connected to the rear part of the seat. In this way, the sliding seat remains connected to the backrest, and there is no horizontal gap between the back and seat, which could affect the comfort and disturb the overall appearance of the chair.
  • Preferably, the seat is provided with a lumbar support, wherein the lumbar support is mounted on a Lordosestützenträger, which is mounted on the one hand on the backrest frame, on the other hand on the backrest frame. In this way, the lumbar support can follow a pivoting of the backrest subframe and so are held in an optimal position in relation to the seat even with an adjustment of the seat depth.
  • In order to allow easy adjustment of the lumbar support, the lumbar support is provided with a cross member and a longitudinal beam, which is connected to the cross member and the back frame, wherein the side member preferably has a telescopic structure and the lumbar support is slidably mounted on the side member.
  • For optimal adaptation to the physique of the seated person, the lumbar support is preferably provided with adjustment means for adjusting the support depth.
  • An embodiment of the invention will be explained with reference to the accompanying drawings. Show it:
  • FIG. 1
    a middle section of an office swivel chair,
    FIG. 2
    a side view of the office swivel chair without seat pad,
    FIG. 3
    a perspective view of the frame structure of the office swivel chair and
    FIG. 4
    a plan view of the frame construction.
  • It should be noted that in the above text and in the following text, the definitions of "front", "back", "top" etc. result from the normal position of a chair.
  • According to FIG. 1 an seat chair comprises a seat with a seat cushion support 5 and a seat cushion 3 and a back frame 7. The seat 1 is slidably mounted on a seat support 9 to the front or rear, wherein the seat support 9 and the back frame 7 are connected to a main support 11 which is attached to a chair column 13. Further shows FIG. 1 a seat mechanism 19, which allows a coordinated adjustment of backrest frame 7 and seat, but does not affect the adjustment of the seat depth and therefore will not be explained further.
  • On the back frame 7, a backrest frame 17 is pivotally mounted, which is connected at its lower end to the rear edge of the seat 1. Further, a lumbar support 15 is provided which is attached to a lumbar support of a cross member 21 and a longitudinal member 23.
  • The arrangement of the latter elements is in particular from the perspective view of FIG. 3 It can be seen that shows the frame construction of the chair without seat cushion. From this representation, it can be seen that the cross member 21 extends between two bars of the back frame 7. In the middle of the cross member 21 of the longitudinal member 23 is fixed, which extends to a transverse spar of the backrest subframe 17. Furthermore, the longitudinal member 23 has a telescopic connection 25.
  • The back frame 17 is in turn connected via a hinge joint 29 of lamellae with the back frame 7.
  • FIG. 3 shows that the seat cushion support 5 is formed as a plate which is made of flexible material and in the middle has a front-to-rear extending ridge 31. The web 31 rests on the seat support 9 ( FIG. 1 ) and may be connected to the seat mechanism 19. The support and flexibility allow for dynamic sitting with alternating right / left loading.
  • In the region of the ischial tuberosities, the seat cushion support is provided with slots 35 which extend parallel to the side edges of the seat cushion support and with slots 37 which extend parallel to its trailing edge to further increase flexibility.
  • In the region of the side edges of the seat cushion support 5 is provided with slots 39 which extend from the side edge in the direction of the web 31. The length of these slots 39 increases, the closer they are to the trailing edge of the seat cushion support 5.
  • The exact arrangement of the slots is in particular from the top view of FIG. 4 seen. This figure also shows adjusting means 41 for adjusting the depth of support of the lumbar support 15, that is, for adjustment in one direction of the seat depth. These adjustment means 41 are designed so that they allow a depth adjustment of the lumbar support 15 separated, right and left, such as eccentric.
  • As indicated by the double arrow in FIG. 2 is shown, which shows the chair without seat cushion, the seat cushion support 5 is slidably mounted in the depth direction in guides of the chair. In this case, the backrest subframe 17 follows a movement of the seat cushion carrier 5, so that no horizontal gap can arise. FIG. 2 shows the seat cushion carrier 5 in a middle position.
  • It should be noted that in the state of use of the chair, the backrest support is provided with a covering, padding or the like.
  • The seat 1 can be fixed in any of its intermediate positions between the rearmost position and the forwardmost position. For this purpose, a rack (not shown) is preferably provided on the seat cushion support 5, which can be brought into engagement with suitable tooth elements and which can be actuated via a button 43.
  • The invention has been explained with reference to an office swivel chair, but the seat depth adjustment according to the invention can also be used in other seating furniture such as four-legged chairs, armchairs, sofas.

Claims (5)

  1. Seating furniture, in particular chair, having a seat (1) and a backrest frame (7), the seat (1) being displaceable relative to the backrest frame (7) for varying the seat depth, characterized by a backrest frame (17) connected to the backrest Part of the seat (1) is connected and pivotally mounted on the back frame (7).
  2. Seating furniture according to claim 1 with a lumbar support (21, 23) which is fastened on the one hand to the backrest frame (7), on the other hand to the backrest frame (17) and carries a lumbar support.
  3. Seating furniture according to claim 2, wherein the lordosis support carrier has a cross member (21) and a side member (23) which is connected to the cross member (21) and the back frame (17), wherein the lumbar support is slidably mounted on the side member.
  4. Seating furniture according to claim 3, wherein the longitudinal member (23) has a telescopic structure.
  5. Seating furniture according to one of claims 1 to 4, wherein the lumbar support (15) is provided with adjustment means (41) for adjusting the support depth.
EP09011823.3A 2009-09-16 2009-09-16 Seating furniture with seat depth adjustment Active EP2298131B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09011823.3A EP2298131B1 (en) 2009-09-16 2009-09-16 Seating furniture with seat depth adjustment

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
EP09011823.3A EP2298131B1 (en) 2009-09-16 2009-09-16 Seating furniture with seat depth adjustment
ES09011823T ES2363707T1 (en) 2009-09-16 2009-09-16 Seat furniture with seat depth adjustment.
US12/878,573 US20110062758A1 (en) 2009-09-16 2010-09-09 Item of Seating Furniture with Seat Depth Adjustment
CA 2714756 CA2714756A1 (en) 2009-09-16 2010-09-13 Item of seating furniture with seat depth adjustment
RU2010138240/12A RU2010138240A (en) 2009-09-16 2010-09-15 Seat furniture with seat depth change

Publications (2)

Publication Number Publication Date
EP2298131A1 true EP2298131A1 (en) 2011-03-23
EP2298131B1 EP2298131B1 (en) 2015-04-08

Family

ID=41800389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09011823.3A Active EP2298131B1 (en) 2009-09-16 2009-09-16 Seating furniture with seat depth adjustment

Country Status (5)

Country Link
US (1) US20110062758A1 (en)
EP (1) EP2298131B1 (en)
CA (1) CA2714756A1 (en)
ES (1) ES2363707T1 (en)
RU (1) RU2010138240A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9913540B2 (en) 2012-09-21 2018-03-13 Steelcase Inc. Chair construction
USD707976S1 (en) 2013-06-07 2014-07-01 Steelcase Inc. Chair
USD704487S1 (en) 2013-06-07 2014-05-13 Steelcase Inc. Chair
USD706547S1 (en) 2013-06-07 2014-06-10 Steelcase Inc. Chair
USD703988S1 (en) 2013-06-07 2014-05-06 Steelcase Inc. Chair
EP3005905B1 (en) * 2013-06-07 2018-10-31 Okamura Corporation Chair
USD721529S1 (en) 2013-06-07 2015-01-27 Steelcase Inc. Handle apparatus
USD703987S1 (en) 2013-06-07 2014-05-06 Steelcase Inc. Chair
US10463153B2 (en) 2016-06-09 2019-11-05 Steelcase Inc. Seating arrangement
USD852524S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851417S1 (en) 2017-05-25 2019-06-18 Steelcase Inc. Seating arrangement
USD852525S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851952S1 (en) 2017-05-25 2019-06-25 Steelcase Inc. Seating arrangement
USD846294S1 (en) 2017-05-25 2019-04-23 Steelcase Inc. Seating arrangement
USD852526S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851418S1 (en) 2017-05-25 2019-06-18 Steelcase Inc. Seating arrangement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162051U (en) * 1980-05-01 1981-12-02
EP0277870A1 (en) * 1987-01-23 1988-08-10 Tousalon France S.A. Operating device for an adjustable chair, seat or couch with a lumbar support
JPH10179315A (en) 1996-12-24 1998-07-07 Itoki Crebio Corp Structure for supporting back rest of chair
JPH10179313A (en) * 1996-12-24 1998-07-07 Itoki Crebio Corp Structure for supporting back rest of chair
DE20108172U1 (en) 2001-05-11 2001-08-09 Mayer Sitzmoebel Gmbh & Co Kg Chair with backrest which is adjustable for adjusting the seat depth relative to the seat part
WO2008018117A1 (en) * 2006-08-07 2008-02-14 Itoki Corporation Chair

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301578A (en) * 1961-09-21 1962-08-17 Chair or chair curved backrest
DE8025516U1 (en) * 1980-09-24 1981-01-15 Zapf, Otto, 6240 Koenigstein SITZMOEBEL
DE8702174U1 (en) * 1987-02-12 1987-04-30 Kemmann & Koch, 5620 Velbert, De
US5582459A (en) * 1993-09-30 1996-12-10 Itoki Crebio Corporation Chair having tiltable seat back
DE29617154U1 (en) * 1996-10-02 1996-12-05 Koinor Polstermoebel Gmbh & Co Upholstered chair or cushion element with adjustable seat and back cushions
NL1014412C2 (en) * 2000-02-17 2001-08-20 Staarink Henricus Antonius M The device for supporting a seated person and a method for the design and / or manufacture of such a facility.
CA2395445C (en) * 2000-10-16 2007-07-31 Yojiro Kinoshita Chair for supporting the pelvis and lumbar
WO2002032262A1 (en) * 2000-10-16 2002-04-25 Kokuyo Co., Ltd. Chair
US7134722B2 (en) * 2002-02-08 2006-11-14 Kokuyo Co., Ltd. Chair
DE102004047619A1 (en) * 2004-09-30 2006-04-13 Hukla-Werke GmbH Matratzen- und Polstermöbelfabriken Reclining chair has cushion which presses back rest against lower back when chair is upright and is mounted on swiveling arms attached at their lower ends to seat cushion so that it moves away from back rest when it is reclined
US7490904B2 (en) * 2007-06-06 2009-02-17 Hogg Mark G Decreased skin shear device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56162051U (en) * 1980-05-01 1981-12-02
EP0277870A1 (en) * 1987-01-23 1988-08-10 Tousalon France S.A. Operating device for an adjustable chair, seat or couch with a lumbar support
JPH10179315A (en) 1996-12-24 1998-07-07 Itoki Crebio Corp Structure for supporting back rest of chair
JPH10179313A (en) * 1996-12-24 1998-07-07 Itoki Crebio Corp Structure for supporting back rest of chair
DE20108172U1 (en) 2001-05-11 2001-08-09 Mayer Sitzmoebel Gmbh & Co Kg Chair with backrest which is adjustable for adjusting the seat depth relative to the seat part
WO2008018117A1 (en) * 2006-08-07 2008-02-14 Itoki Corporation Chair

Also Published As

Publication number Publication date
RU2010138240A (en) 2012-03-20
US20110062758A1 (en) 2011-03-17
ES2363707T1 (en) 2011-08-12
EP2298131B1 (en) 2015-04-08
CA2714756A1 (en) 2011-03-16

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