EP2974620B1 - Stuhl - Google Patents

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Publication number
EP2974620B1
EP2974620B1 EP15177024.5A EP15177024A EP2974620B1 EP 2974620 B1 EP2974620 B1 EP 2974620B1 EP 15177024 A EP15177024 A EP 15177024A EP 2974620 B1 EP2974620 B1 EP 2974620B1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
limit
supporting structure
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.)
Not-in-force
Application number
EP15177024.5A
Other languages
English (en)
French (fr)
Other versions
EP2974620A1 (de
Inventor
David Stephen Bonneywell
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.)
Boss Design Ltd
Original Assignee
Boss Design Ltd
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 GBGB1412733.6A external-priority patent/GB201412733D0/en
Application filed by Boss Design Ltd filed Critical Boss Design Ltd
Publication of EP2974620A1 publication Critical patent/EP2974620A1/de
Application granted granted Critical
Publication of EP2974620B1 publication Critical patent/EP2974620B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
    • 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
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs

Definitions

  • the present invention relates to a chair of the kind used in an office environment.
  • WO 00/67615 by Bujaryn describes a chair comprising a seat pan and an armrest support pivotably attached to a mounting assembly comprising a lower and an upper rail.
  • the potential maximum rearward tilt of the seat pan is limited by the tilt of the mounting assembly, and if the mounting assembly is not fully titled, the seat pan cannot achieve its maximum rearward tilt.
  • the chair comprises a backrest, a seat, a supporting structure for supporting the backrest and/or the seat and a base support, wherein the supporting structure, the seat and the backrest are each pivotably mounted to permit the supporting structure, the seat and the backrest to each tilt over a predetermined range, to allow the chair to move into and out of a reclined position.
  • the seat is free to pivot over its predetermined range relative to the supporting structure independently of any tilt of the supporting structure.
  • the backrest is free to pivot over its predetermined range relative to the supporting structure independently of any tilt of the supporting structure.
  • the supporting structure is pivotably mounted with respect to the base support, the seat is pivotably mounted with respect to the supporting structure and the backrest is pivotably mounted with respect to the supporting structure.
  • the chair further comprises a backrest tilt mechanism that permits the backrest to pivot about a pivot point with respect to the supporting structure such that the backrest is tiltable between a first limit in a first direction and a second limit in a second and opposite direction, the first limit and the second limit defining the predetermined range of the backrest.
  • the backrest tilt mechanism comprises a component for regulating or dampening the motion and return of the backrest during tilting.
  • the component may be or comprise a pre-tensioned or resiliently deformable component that is deformable when the backrest is tilted in one or each direction.
  • the component is or comprises a spring steel member, a spring, an elastomeric member, or a hydraulic dampener.
  • the first and second limits may be defined by stop positions on the supporting structure.
  • the backrest may be tiltable from a neutral position to the first limit of approximately -12°.
  • the cradle 28 In a neutral (or starting) position, e.g. before a person sits on the chair 10, the cradle 28 is in position 'A', the seat 36 is in position 'C' and the backrest is in position 'F'.
  • the cradle 28 is pivoted with respect to the shaft 22 and base 12 at pivot point 'I', the seat 36 is pivoted with respect to the cradle 28 at pivot points J and the backrest 44 is pivoted with respect to the cradle 28 at pivot points 'K'.
  • Figures 2a, 2b , and 4 to 6 show that regardless of the tilt of the cradle 28, the seat 36 retains its full range of movement (tilt about joint J). Regardless of the tilt of cradle 28, the backrest 44 retains its full range of movement (tilt about joint K).
  • the full range of movement may be referred to as "full-range tilt” for brevity.
  • This also means that there is no fixed angular relationship between the seat 36 and the backrest 44.
  • the backrest 44 may be inclined fully back, to a position 'H' (or 'G', or 'F'), and the seat 36 may, independently of the backrest, swivel at any angle, e.g. between positions 'D' and 'E'.
  • the seat 36 may be inclined at any one of positions 'C', 'D', or 'E', and the backrest 44 is free to swivel independently of the tilt of seat 36.
  • the support block 26 comprises two apertures 58, in each of which is provided an annular bearing 60.
  • An axle 62 e.g. formed of steel
  • Each end of the axle 62 is located within one of the end portions 52 of the cradle arm 30 so as to couple the cradle arms 30 to the support block 26 and permit relative movement therebetween.
  • the cradle 30 can thus pivot with respect to the support block 26 which is fixed relative to the shaft 22 and base 12.
  • the pivoting motion is dampened or regulated by two coiled steel springs 64.
  • Bearings 66 are provided at each end of the springs 64 to help constrain the motion of the spring and reduce friction between the springs 64 and the support block 26.
  • Rubber buffers 70, 72 are provided on the upper surface of the support block 26, to act as movement limiters or stops.
  • a first pair of buffers 70 is provided along a first edge 74 of the support block 26 and a second pair of buffers 72 are provided along a second edge 76 of the support block 26.
  • Figure 7d represents the cradle in a "neutral" position at substantially 0° with respect to the horizontal.
  • the spring 64 is in an uncompressed, or primarily uncompressed state. The spring 64 thus urges the cradle end 52 away from the support block on one side of the support block (in the vicinity of the second edge 76) and the cradle end 52 is spaced from the stops 72.
  • Figure 8a is an external view showing the portion of the backrest frame 46 where it is coupled to the armrest portion 34 of the cradle 28.
  • the remaining Figures 8b to 8f show the interior of the portion of the backrest frame 44.
  • An annular bearing 80 is secured within an aperture 82 of the armrest 34.
  • a connector 84 is provided that is fixed with respect to the armrest 34.
  • the connector 84 may be secured within the armrest 34 with a grub screw (not visible in the Figures).
  • the connector 84 is preferably formed of sintered steel.
  • a first stop 86 is provided that can be brought into contact with a first end 84a of the connector 84.
  • a second stop 88 is provided that can be brought into contact with a second end 84b of the connector 84. Movement between the stops 86 and 88 is achieved through pivoting of the backrest frame 44 with respect to the connector 84 and the armrest 34.
  • the stops 86, 88 may be formed of glass filled nylon.
  • a resiliently biased component 90 is also provided with the backrest frame 44, e.g. in the form of a spring steel bar.
  • a first end 92 thereof is received in and supported by a recess 94 in the connector 84 (as can be seen in Figure 8c ).
  • the recess 94 acts as a stop or movement limiter. Movement of the opposite end 96 is limited by a stop 98.
  • Figure 9a is an external view showing the portion of the seat frame 36 where it is coupled to the upright portion 32 of the cradle 28.
  • the remaining Figures 9b to 9f show the interior of the portion of the seat frame 36.
  • a connector 100 couples the seat frame 38 to the cradle 28.
  • the connector 100 comprises a shaft 102 receivable within a bearing 104 provided within an aperture 106 of the cradle 28.
  • a cap 108 helps to secure, via fastenings 110, the connector 100 in place and provide a continuous/flush surface within the seat frame 36.
  • An embodiment of a chair 10 according to the present invention has undergone an ergonomics assessment.
  • the seat height was adjusted so that all the users were able to sit on the chair with their feet flat on the floor (no undue pressure at the back of knees).
  • the ergonomics assessment consisted of 10 people (4 females and 6 males) with varying stature from 5th to 95th centile UK population sitting on the chair which was part of a rig. Subjects sat on a pressure map on the seat pad 40 and backrest 44 and their pressure profiles were recorded.

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  • Chairs Characterized By Structure (AREA)

Claims (13)

  1. Zentralsäule-Bürostuhl (10), umfassend eine Rückenlehne (44), einen Sitz (36), eine Tragstruktur (28) zum Tragen der Rückenlehne (44) und des Sitzes (36) und eine Basisabstützung (12), wobei die Tragstruktur (28) relativ zur Basisabstützung (12) schwenkbar gelagert ist, und der Sitz (36) und die Rückenlehne (44) jeweils relativ zur Tragstruktur (28) schwenkbar gelagert sind, um der Tragstruktur (28), dem Sitz (36) und der Rückenlehne (44) zu ermöglichen, jeweils in einem vorbestimmten Bereich zu schwenken, um dem Stuhl (10) zu ermöglichen, sich in eine und aus einer zurückgelehnten Position zu bewegen, wobei der Sitz (36) in seinem vorbestimmten Bereich relativ zur Tragstruktur (28) unabhängig von einer Neigung der Tragstruktur (28) relativ zur Basisabstützung (12) frei schwenkbar ist, und wobei die Rückenlehne (44) in ihrem vorbestimmten Bereich relativ zur Tragstruktur (28) unabhängig von einer Neigung der Tragstruktur (28) relativ zur Basisabstützung (12) frei schwenkbar ist.
  2. Zentralsäule-Bürostuhl (10) nach Anspruch 1, ferner umfassend einen Sitzschwenkmechanismus, welcher dem Sitz (36) ermöglicht, um einen Schwenkpunkt und relativ zur Basisabstützung (12) zu schwenken, sodass der Sitz (36) zwischen einer ersten Begrenzung in einer ersten Richtung und einer zweiten Begrenzung in einer zweiten entgegengesetzten Richtung schwenkbar ist, wobei die erste und die zweite Begrenzung den vorbestimmten Bereich des Sitzes (36) definieren.
  3. Zentralsäule-Bürostuhl (10) nach Anspruch 2, wobei der Sitzschwenkmechanismus eine Komponente zur Regulierung oder Dämpfung der Bewegung und des Zurückkehrens des Sitzes (36) während des Schwenkens umfasst.
  4. Zentralsäule-Bürostuhl (10) nach Anspruch 3, wobei der Sitz von einer neutralen Position bei 0° bis zur ersten Begrenzung bei etwa +5° und bis zur zweiten Begrenzung bei etwa -5° schwenkbar ist.
  5. Zentralsäule-Bürostuhl (10) nach einem der vorhergehenden Ansprüche, ferner umfassend einen Rückenlehnenschwenkmechanismus, welcher der Rücklehne (44) ermöglicht, um einen Schwenkpunkt relativ zur Tragstruktur (28) zu schwenken, sodass die Rückenlehne (44) zwischen einer ersten Begrenzung in einer ersten Richtung und einer zweiten Begrenzung in einer zweiten entgegengesetzten Richtung schwenkbar ist, wobei die erste und die zweite Begrenzung den vorbestimmten Bereich der Rückenlehne (44) definieren.
  6. Zentralsäule-Bürostuhl (10) nach Anspruch 5, wobei der Rückenlehnenschwenkmechanismus eine Komponente zur Regulierung oder Dämpfung der Bewegung und des Zurückkehrens der Rückenlehne (44) während des Schwenkens umfasst.
  7. Zentralsäule-Bürostuhl (10) nach Anspruch 5 oder 6, wobei die Rückenlehne (44) von einer neutralen Position bis zur ersten Begrenzung bei etwa -12° schwenkbar ist.
  8. Zentralsäule-Bürostuhl (10) nach einem der vorhergehenden Ansprüche, ferner umfassend einen Schwenkmechanismus, welcher der Tragstruktur (28) ermöglicht, um einen Schwenkpunkt relativ zur Basisabstützung (12) zu schwenken, sodass die Tragstruktur (28) zwischen einer ersten Begrenzung in einer ersten Richtung und einer zweiten Begrenzung in einer zweiten entgegengesetzten Richtung schwenkbar ist, wobei die erste und die zweite Begrenzung den vorbestimmten Bereich der Tragstruktur (28) definieren.
  9. Zentralsäule-Bürostuhl (10) nach Anspruch 8, wobei der Schwenkmechanismus eine Komponente zur Regulierung oder Dämpfung der Bewegung und des Zurückkehrens der Rückenlehne (44) während des Schwenkens umfasst.
  10. Zentralsäule-Bürostuhl (10) nach Anspruch 3, 6 oder 9, wobei die Komponente eine vorgespannte oder elastisch verformbare Komponente ist oder umfasst, welche verformbar ist, wenn die Rückenlehne (44) in einer oder in jeder Richtung geschwenkt wird.
  11. Zentralsäule-Bürostuhl (10) nach Anspruch 10, wobei die Komponente ein Federstahlglied, eine Feder, ein elastomeres Glied oder ein hydraulisches Dämpfungsmittel ist oder umfasst.
  12. Zentralsäule-Bürostuhl (10) nach einem der Ansprüche 8 bis 11, wobei die erste und die zweite Begrenzung durch einen oder mehreren Puffer (70, 72) definiert sind, welche innerhalb des Schwenkmechanismus bereitgestellt sind.
  13. Zentralsäule-Bürostuhl (10) nach einem der Ansprüche 8 bis 12, wobei die Tragstruktur (28) von einer neutralen Position bis zu einer ersten Begrenzung bei etwa -9° schwenkbar ist.
EP15177024.5A 2014-07-17 2015-07-16 Stuhl Not-in-force EP2974620B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1412733.6A GB201412733D0 (en) 2014-07-17 2014-07-17 Chair
GB1506323.3A GB2528349B (en) 2014-07-17 2015-04-14 Chair

Publications (2)

Publication Number Publication Date
EP2974620A1 EP2974620A1 (de) 2016-01-20
EP2974620B1 true EP2974620B1 (de) 2018-08-29

Family

ID=53758009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15177024.5A Not-in-force EP2974620B1 (de) 2014-07-17 2015-07-16 Stuhl

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EP (1) EP2974620B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711329U1 (de) * 1997-06-19 1997-08-28 Peter Opsvik A/S, Oslo Anordnung an kippbarem Stuhl
US6935962B1 (en) * 2004-08-23 2005-08-30 Taiwan Shin Yeh Enterprise Co., Ltd. Swing with an extension frame
WO2013131753A1 (de) * 2012-03-08 2013-09-12 Inno-Motion Ag Gleichgewichtsliege

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4911501A (en) * 1989-06-09 1990-03-27 Harter Corporation Suspension mechanism for connecting chair backs and seats to a pedestal
DE29802360U1 (de) * 1998-02-12 1999-06-10 Vogtherr, Burkhard, Mulhouse Funktionsstuhl
US6523895B1 (en) * 1999-02-05 2003-02-25 Davis Furniture Industries, Inc. Ergonomic chair

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29711329U1 (de) * 1997-06-19 1997-08-28 Peter Opsvik A/S, Oslo Anordnung an kippbarem Stuhl
US6935962B1 (en) * 2004-08-23 2005-08-30 Taiwan Shin Yeh Enterprise Co., Ltd. Swing with an extension frame
WO2013131753A1 (de) * 2012-03-08 2013-09-12 Inno-Motion Ag Gleichgewichtsliege

Also Published As

Publication number Publication date
EP2974620A1 (de) 2016-01-20

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