EP2364616B1 - Sitz - Google Patents

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Publication number
EP2364616B1
EP2364616B1 EP11156811A EP11156811A EP2364616B1 EP 2364616 B1 EP2364616 B1 EP 2364616B1 EP 11156811 A EP11156811 A EP 11156811A EP 11156811 A EP11156811 A EP 11156811A EP 2364616 B1 EP2364616 B1 EP 2364616B1
Authority
EP
European Patent Office
Prior art keywords
block
slide
back rest
chair according
seat support
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.)
Active
Application number
EP11156811A
Other languages
English (en)
French (fr)
Other versions
EP2364616A1 (de
Inventor
Henning Zöhner
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.)
Kinnarps AB
Original Assignee
Kinnarps AB
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 Kinnarps AB filed Critical Kinnarps AB
Priority to PL11156811T priority Critical patent/PL2364616T3/pl
Publication of EP2364616A1 publication Critical patent/EP2364616A1/de
Application granted granted Critical
Publication of EP2364616B1 publication Critical patent/EP2364616B1/de
Active 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
    • 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
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf 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
    • 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
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity

Definitions

  • the invention relates to a chair, particularly an office swivel chair, with a seat support arranged on a frame and a pivotably mounted back rest pressed into an upright initial position by at least one spring, the force of the spring being adjustable.
  • DE 198 10 768 discloses an office swivel chair having a back rest support mounted on a frame so that it can pivot around a horizontal axis, wherein by pivoting the back rest a seat support is shifted simultaneously. Underneath the seat a spring acts on the seat support to push the back rest into an upright position via an interconnection of the seat support.
  • an adjustment mechanism is provided having a rotating device arranged underneath the seat to adjust the force of the spring. The rotating device is not easily accessible for the user in the seated position, while exactly in the seated position an adjustment is desired, since the readjusted spring force can then be tested by the user. Moreover the rotating device only renders a finer adjustment.
  • EP 368 471 discloses a chair with a seat chassis member being pivotally mounted to a frame member about a horizontal axis.
  • An elastomeric block surrounding a rod urges the seat chassis member to a forwardly tilted position before a occupant tilts it to a reawardly tilted position.
  • the degree of compression of the elastomeric block can be altered by a cap mounted on the rod in the elastomeric block.
  • the object of the present invention is the provision of a chair in which the spring force bringing the back rest into an upright position is adjustable in an easy way.
  • the biasing mechanism comprises at least one spring with a block of elastomer material, which can be compressed by pivoting the back rest.
  • a block of elastomer material which can be compressed by pivoting the back rest.
  • An adjusting element is provided via which the compressible volume of the at least one block is adjustable.
  • the spring force can be changed in a simple way, the adjusting element having a contact surface contacting a lateral edge of the at least one elastomer block, wherein by moving the adjusting element the size of the contact surface on the block can be changed.
  • the adjusting element can comprise a slide which can be moved parallel to a lateral edge of the block, wherein the actuation of the slide can be carried out in a simple way while the user is seated, to adjust the desired return force.
  • the slide can be moved smoothly between different positions so that with one adjusting movement the spring force can be changed from a minimum position to a maximum position.
  • the slide is formed in the shape of a rail and comprises a recess adjacent to the contact surface into which the elastomer block can be pressed at least partially.
  • the volume of the material of the block provided for the compression can be changed in a simple way, wherein the non-compressible volume is pressed into the recess on the slide in a simple way.
  • At least one holding means is provided to fixate the chosen position.
  • the slide can comprise detents and/or teeth on the side opposite the contact surface, which cooperates with a holding device of the frame for fixation. Thus a fixation can be ensured particularly in the loaded position.
  • the seat support is shiftably mounted, and when the back rest is pivoted the seat support is shifted.
  • the at least one block of elastomer material can be supported on the frame or on the seat support and be compressed by the pushing movement of the seat so that a particularly compact construction results.
  • the slide is preferably shiftably guided in the upright position of the back rest with a clearance or form-fitting between the lateral edge of the block and a holding means. Then no clamping force by the elastomer block acts on the slide during the adjustment procedure.
  • the block of elastomer material is preferably formed from a foamed material and has a volume between 5 cm 3 and 120 cm 3 , preferably between 10 cm 3 and 100 cm 3 .
  • Several blocks of elastomer material can be provided on the chair, in particular two blocks, which enable a transmission of force symmetrical to the central plane of the seat support.
  • several springs can be provided for biasing the back rest which are only partly formed as blocks of elastomer material.
  • a chair 1 comprises a frame 2 on which a back rest 3 is pivotably mounted. To this end, a horizontal axle 5 is rotatably held on the frame 2. In addition, a seat support 4 is shiftably guided on the frame 2, the seat support 4 being movable via a cantilever 6 protruding from the back rest 3. By pivoting the back rest 3 to the rear, the seat support 4 is also shifted to the rear ( Fig. 2 ).
  • a first spring is provided in the form of a wire bracket 7, which can be tensioned or relaxed by means of an adjusting device 21.
  • Corresponding adjusting mechanisms for mechanical springs are known and will thus not be explained in detail.
  • the spring can also be formed as shown in DE 198 10 768 . Furthermore such a spring can be omitted within the present invention.
  • the chair 1 is constructed as an office chair, wherein a receptacle 20 for a foot is formed on the frame 2.
  • a block 9 of an elastomer material is provided, in particular of a foamed material, for instance of a cellular polyurethane elastomer, which is held between a contact rail 8 on the wire bracket 7 and a slide 10.
  • the block 9 has the shape of a cuboid, wherein a plate-shaped holder 11 fixed on the underside of the seat support 4 is provided on each opposing end face.
  • the holders 11 can be formed angularly to support the block 9 of elastomer material on the underside.
  • the chair 1 is formed symmetrically to a central vertical plane, wherein a block 9 of elastomer material is arranged on each side.
  • a slide 10 is provided which is supported by a rail-shaped holding means 14 on the side opposite the block 9.
  • the holding means 14 is connected to the seat support 4 and comprises an oblong hole 13 in which a grip portion 12 for adjusting the slide 10 is arranged.
  • the slide 10 can be moved in horizontal direction parallel to a lateral edge 90 of the block 9.
  • the slide 10 comprises a contact surface 91 which can contact the lateral edge 90 of the block 9 at least partially. By adjusting the position of the slide 10, the size of the contacting area of the contact surface 91 is adjusted. Adjacent to the contact surface 91 a recess 16 is formed on the slide, into which at least a part of the block 9 can be pressed.
  • the slide 10 comprises two cuboid protrusions 17 connected to one another via a web 18.
  • Fig. 4 the slide 10 is adjusted to minimum spring power.
  • the protrusions 17 of the slide 10 are disenganged from the two blocks 9 of elastomer material. If the back rest 3 is pivoted to the rear, the seat support 4 is also moved to the rear, so that the rail-shaped holding means 14 and the slide 10 are moved towards the elastomer blocks 9.
  • the elastomer block 9 on the right side can be inserted into the recess 16 so that the lateral edge 90 of the block 9 is not impinged by the contact surface 91.
  • On the left side the block 9 is arranged at a distance to the protrusion 17 and is not compressed either. A return force is exclusively created by the additional mechanical spring.
  • Fig. 5 the slide 10 is arranged in a position for creating a maximum return force.
  • the contact surface 91 on the protrusion 17 is arranged opposite the lateral edge 90 of the block 9 over the entire length, so that now when the back rest 3 is pivoted, the block 9 is compressed over the entire length.
  • the distance between the slide 10 and the contact surface 8 of the wire bracket 7 decreases, as can be seen in Fig. 2 .
  • the blocks 9 of elastomer material create a return force to bring the back rest 3 into an upright position.
  • two spaced-apart blocks 9 of elastomer material, particularly polyurethane, are provided, which renders a particularly flat construction of the seat support 4 possible.
  • elastomer material particularly polyurethane
  • the block 9 could then also be positioned centrally under the seat support.
  • the at least one block 9 of elastomer material can provide an additional spring force to return the back rest if at least one additional spring is provided to bring the back rest 3 in an upright position.
  • additional spring can be provided to bring the back rest 3 in an upright position.
  • the slide 10 is shifted parallel to the lateral edge 90 of the block 9, wherein a smooth guiding is possible in the unloaded state, particularly when the slide 10 is arranged with a clearance between the rail-shaped holding means 14 and the elastomer block 9. It is also possible to move the slide 10 in vertical direction to adjust the spring force by the elastomer block. Moreover, instead of the slide 10 a pivoting mechanism or another mechanism can be provided to vary the size of the contact surface on the elastomer block 9.

Claims (9)

  1. Stuhl (1), insbesondere Bürodrehstuhl, mit einem auf einem Gestell (2) angeordneten Sitzträger (4) und einer verschwenkbar gelagerten Rückenlehne (3), die durch mindestens eine Feder in eine aufrechte Ausgangsposition gedrückt ist, wobei die Kraft der Feder einstellbar ist, der Sitzträger (4) verschiebbar gelagert ist und beim Verschwenken der Rückenlehne (3) der Sitzträger (4) verschoben wird, als Feder mindestens ein Block (9) aus elastomerem Material vorgesehen ist, der durch Verschwenken der Rückenlehne (3) zusammendrückbar ist und ein Verstellelement (10) vorgesehen ist, mittels dem das komprimierbare Volumen des mindestens einen Blockes (9) verstellbar ist dadurch gekennzeichnet, dass das Verstellelement (10) eine Anlagefläche (91) aufweist, die an einer Seitenkante (90) des mindestens einen elastomeren Blockes (9) anliegt, und durch Bewegen des Verstellelementes (10) die Größe der an dem Block (9) anliegenden Anlagefläche (91) veränderbar ist.
  2. Stuhl nach Anspruch 1, dadurch gekennzeichnet, dass das Verstellelement (10) einen Schieber (10) aufweist, der parallel zu einer Seitenkante (90) des Blockes (9) bewegbar ist.
  3. Stuhl nach Anspruch 2, dadurch gekennzeichnet, dass der Schieber (10) leistenförmig ausgebildet ist und benachbart zu einer Anlagefläche (91) eine Aussparung (16) aufweist, in die zumindest teilweise der elastomere Block (9) eindrückbar ist.
  4. Stuhl nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Schieber (10) mindestens ein Haltemittel (15) aufweist, um die eingestellte Position zu fixieren.
  5. Stuhl nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Schieber (10) auf der zur Anlagefläche (91) gegenüberliegenden Seite eine Rastung und/oder Verzahnung (15) aufweist, die zur Fixierung mit einer Halteeinrichtung (14) des Gestells zusammenwirkt.
  6. Stuhl nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der mindestens eine Block (9) aus elastomerem Material an dem Gestell (2) oder dem Sitzträger (4) gehalten ist und durch eine Schiebebewegung des Sitzträges (4) zusammendrückbar ist.
  7. Stuhl nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass der Schieber (10) in der aufrechten Position der Rückenlehne (3) im Spiel zwischen der Seitenkante (90) des Blockes (9) und einem Haltemittel (14) verschiebbar geführt ist.
  8. Stuhl nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Block (9) aus elastomerem Material aus Schaumstoff gebildet ist und ein Volumen zwischen 5 cm3 bis 120 cm3, vorzugsweise 10 cm3 bis 100 cm3, aufweist.
  9. Stuhl nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass mindestens zwei voneinander beabstandete Blöcke (9) aus elastomerem Material vorgesehen sind.
EP11156811A 2010-03-09 2011-03-03 Sitz Active EP2364616B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11156811T PL2364616T3 (pl) 2010-03-09 2011-03-03 Krzesło

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010015866.6A DE102010015866B4 (de) 2010-03-09 2010-03-09 Stuhl

Publications (2)

Publication Number Publication Date
EP2364616A1 EP2364616A1 (de) 2011-09-14
EP2364616B1 true EP2364616B1 (de) 2012-11-28

Family

ID=43983697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11156811A Active EP2364616B1 (de) 2010-03-09 2011-03-03 Sitz

Country Status (3)

Country Link
EP (1) EP2364616B1 (de)
DE (1) DE102010015866B4 (de)
PL (1) PL2364616T3 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10070727B2 (en) 2012-10-17 2018-09-11 Formway Furniture Limited Chair and supports

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374350A (en) * 1941-10-01 1945-04-24 Bassick Co Posture chair
GB8825077D0 (en) 1988-10-26 1988-11-30 Phr Furniture Ltd Pedestal chair
DE4212573A1 (de) * 1992-04-15 1993-10-21 Claus Uredat Stuhl
DE4421597A1 (de) * 1994-06-21 1996-01-04 Link Wilhelm Kg Stuhl, insbesondere Bürostuhl
DE19810768B4 (de) 1998-03-06 2009-09-24 Drabert Gmbh Bürostuhl
DE10356190B4 (de) 2003-12-02 2007-10-04 Christian Erker Sitzlehnenregulierung
DE202007006762U1 (de) * 2006-10-13 2008-02-14 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl

Also Published As

Publication number Publication date
DE102010015866A1 (de) 2011-09-15
DE102010015866B4 (de) 2022-01-20
PL2364616T3 (pl) 2013-05-31
EP2364616A1 (de) 2011-09-14

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