EP3824766A1 - Siège - Google Patents

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Publication number
EP3824766A1
EP3824766A1 EP20208304.4A EP20208304A EP3824766A1 EP 3824766 A1 EP3824766 A1 EP 3824766A1 EP 20208304 A EP20208304 A EP 20208304A EP 3824766 A1 EP3824766 A1 EP 3824766A1
Authority
EP
European Patent Office
Prior art keywords
spring structure
hinge axis
seating furniture
seat
rear hinge
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
EP20208304.4A
Other languages
German (de)
English (en)
Other versions
EP3824766B1 (fr
Inventor
Yannick OSTER
Carsten Gehner
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.)
Wilkhahn Wilkening and Hahne GmbH and Co KG
Original Assignee
Wilkhahn Wilkening and Hahne GmbH and Co KG
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 Wilkhahn Wilkening and Hahne GmbH and Co KG filed Critical Wilkhahn Wilkening and Hahne GmbH and Co KG
Publication of EP3824766A1 publication Critical patent/EP3824766A1/fr
Application granted granted Critical
Publication of EP3824766B1 publication Critical patent/EP3824766B1/fr
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
    • A47C1/03294—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
    • 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 invention relates to a piece of seating furniture which can be pivoted at least from an upright basic position into a reclined position and vice versa.
  • Seating furniture of this type is used in particular as office chairs and has what is known as a synchronous mechanism in which the backrest and seat pivot at the same time, the pivoting angle of the backrest usually being set about twice as large as the pivoting lever of the seat.
  • Most of the synchronous mechanisms known on the market however, have a relatively large number of swivel or swivel joints.
  • Seating furniture has a support structure, a seat and a backrest arranged on a support arm, the seat being supported on a spiral spring connected to the support arm, which is arranged so that it can be elastically deflected transversely to its longitudinal extent when the seat is loaded is.
  • the seat is connected at its front end to the support structure via an approximately vertically extending slot on the support structure and a substantially horizontally extending slot on the seat, a shaft being passed through the two slots, which is located in the area of the free end of the spiral spring on this rests.
  • the spiral spring takes on the function of an energy store, by which a reclining movement defined by further hinge points is cushioned.
  • the seat of this office chair is lifted through the vertically aligned elongated hole on the support structure.
  • the DE 1 297 306 A discloses a tilting chair with a support part and a seat part pivotally connected to this by articulated means using a leaf spring, the rear end of the leaf spring being supported on the seat part, while the front end of the leaf spring is connected to the support part via a device for adjusting the spring tension .
  • the support part also has a pivotable stop which supports the leaf spring in a central area and causes the spring to bend when the spring is loaded.
  • a chair with a leaf spring is still out of the way DE 103 19 316 A1 known, wherein the leaf spring is pivotally mounted in a central area on a support unit and a seat is supported on the leaf spring at the front and rear ends. In the rear area, the seat is articulated to a connecting arm which is pivotably articulated to the support unit and which supports the backrest.
  • the invention is based on the object of creating a piece of furniture that realizes the function of the synchronous mechanism with a relatively small number of components.
  • the object is achieved by a piece of seating furniture with a support structure, a seat, a backrest and a spring structure, the spring structure forming a kinematic unit with the backrest and the seat being connected to the spring structure.
  • the spring structure is pivotably mounted in a central area about a rear hinge axis on the support structure and has a front hinge axis in a front area, which is movably supported on the support structure, so that the seating furniture at least tilts back from an upright basic position around the rear hinge axis Position is pivotable.
  • the spring structure is L-shaped in a side view, an essentially horizontally extending limb being provided for connecting the seat and an upwardly extending limb for connecting or forming the backrest.
  • the front and rear hinge axes are firmly connected to the spring structure, the front hinge axis being movably supported in a guide on the support structure and the guide being oriented in such a way that when the chair is pivoted from the upright basic position to the reclined position and vice versa a change in the distance between the two joint axes and a resulting elastic deformation of the spring structure results.
  • the spring structure is designed in the manner of a leaf spring at least in the area between the front and the rear hinge axis, but preferably over its entire length.
  • the leaf spring thus not only takes on the function of an energy store, but also the function of lifting kinematics, which in other product examples is implemented via a corresponding four-link chain ( DE 10 2014 103 780 B3 ).
  • the guide can in particular be formed by a link, a slot or a groove, the front joint axis being in a central position in the guide in the upright basic position and in a first end position in the tilted back position.
  • the seating furniture can then also assume a forwardly inclined position in which the front joint axis is in the other end position in the guide.
  • the seat is held on the spring structure via front seat connection means and rear seat connection means.
  • the front seat connection means can preferably be connected to the spring structure between the front and the rear hinge axis and the rear seat connection means behind the rear hinge axis.
  • the spring structure forms an arch with an apex between the front and rear joint axes. It has proven to be particularly advantageous if the front seat connection means are connected to the spring structure in front of or on the apex of the arching arch in order to ensure an optimal lifting of the front area of the seat when leaning back.
  • the rear hinge axis is mounted on the support structure in a laterally tiltable manner in order to realize a lateral pivotability of the chair.
  • This can take place in particular in that the rear hinge axis is mounted centrally on the support structure.
  • a convexly curved roll-off track is provided on the support structure, on which the rear hinge axis rolls when the chair moves sideways.
  • FIG. 1 Seating furniture shown in its upright basic position consists essentially of a support structure 1, a seat 2, a backrest 3 and a spring structure 4, the spring structure 4 forming a kinematic unit with the backrest 3 and the seat 2 being connected to the spring structure 4.
  • the spring structure 4 is mounted on the support structure 1 so as to be pivotable about a rear hinge axis 5 in a central region.
  • the spring structure 4 has a front hinge axis 6 in a front area, which is movably supported on the support structure 1.
  • the seating is from the in Fig. 1 upright basic position shown around the rear joint axis 5 in the in Fig. 2 shown tilted back position.
  • the two joint axes 5, 6 are firmly connected to the spring structure 4.
  • the front hinge axis 6 is movably supported in a guide 7 attached to the support structure 1.
  • the guide 7 is designed, for example, in the manner of a link, a slot or a groove in which the front hinge axis 6 is displaceably guided.
  • the guide 7 is slightly curved in the illustrated embodiment, but could in principle also be aligned straight. In any case, it is aligned so that the distance between the rear hinge axis 5 and the front hinge axis 6 differs from the one shown in FIG Fig. 1 shown upright basic position when leaning back in the in Fig. 2 shown leaning back position shortened. This is made possible by the fact that the spring structure 4 forms an increasing arching arc 8 with an apex between the front and rear joint axes 6, 5 when it is tilted back.
  • the seat 2 is held on the spring structure via front seat connection means 10 and rear seat connection means 11, the front seat connection means 10 preferably being connected to the spring structure between the front and rear hinge axes 6, 5 and the rear seat connection means 11 behind the rear hinge axis 5.
  • the front seat connection means 10 are in particular connected to the spring structure 4 in front of or on the apex 9 of the arch 8, as a result of which the front area of the seat 2 is lifted when tilting back.
  • the spring structure 4 is essentially L-shaped, the essentially horizontal leg being provided for connecting the seat 2, while the upwardly extending leg is provided for connecting or forming the backrest 3.
  • the backrest 3 can thus directly on the Spring structure 4 can be formed or is fastened to the spring structure 4 via suitable holding means.
  • the spring structure 4 is preferably designed as a leaf spring and is dimensioned such that the angle between the seat 2 and the backrest 3 when leaning back into the reclined position according to FIG Fig. 2 enlarged in order to set the desired synchro-ratio.
  • the angle of the backrest changes between the positions according to FIGS. 1 and 2 about twice as strong as the angle of the seat 2.
  • the guide 7 is designed in such a way that the front hinge axis 6 is in the upright basic position according to FIG Fig. 1 in a central position in the guide 7 and in the reclined position according to FIG Fig. 2 is in a first end position.
  • the seating furniture can be brought into a forward-inclined position, as in FIG Fig. 3 is shown.
  • the front joint axis assumes the other end position in the guide 7. This is achieved in that the leaf spring 4 in the upright basic position according to FIG Fig. 1 between the two joint axes 5, 6 also already forms a slight arching arc, which is then in the position according to FIG Fig. 3 is further flattened.
  • FIGS. 1 to 3 The position shown by the guideway of the guide 7 is decisively influenced.
  • the elasticity of the spring structure 4 and the location where the front seat connection means 10 and the rear seat connection means 11 are connected to the spring structure also have a great influence on the synchronous movement.
  • the front and rear seat connection means 10, 11 are each present in pairs and are attached to the side of the spring structure 4, which is designed as a leaf spring.
  • both the seat 2 can be provided with a suitable seat pad 12 and the backrest 3 can be provided with a backrest pad 13.
  • the support structure 1 also has one or more feet in the usual manner. When using a central column, this is usually telescopic and supports itself with a base 14 on the floor.
  • the seat 2 provides a seat frame on which the seat support 12 is stretched in a self-supporting manner.
  • the chair can be swiveled to the side in that the rear hinge axis 5 is mounted on the support structure 1 so that it can be tilted laterally.
  • the rear hinge axis 5 is preferably held centrally on the support structure 1, as shown in FIGS. 6 and 7 emerges.
  • a convexly curved roll-off track 15 is provided on the support structure 1, on which the rear hinge axis 5 is centrally mounted. So that the rear hinge axis 5 does not slip laterally, a toothed strip 16, for example, is applied to the roll-off track and engages with a toothed area 5a on the rear hinge axis 5.
  • the rear hinge axis 5 is also held in position in the longitudinal direction of the chair by a housing 17 in order to prevent the toothed area of the rear shaft 5 from disengaging from the toothed strip 16.
  • the momentary pivot point moves outwards when the chair is tilted to the side, which enables the chair to move laterally.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP20208304.4A 2019-11-21 2020-11-18 Siège Active EP3824766B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019131428.3A DE102019131428B4 (de) 2019-11-21 2019-11-21 Sitzmöbel

Publications (2)

Publication Number Publication Date
EP3824766A1 true EP3824766A1 (fr) 2021-05-26
EP3824766B1 EP3824766B1 (fr) 2022-08-17

Family

ID=73475955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20208304.4A Active EP3824766B1 (fr) 2019-11-21 2020-11-18 Siège

Country Status (2)

Country Link
EP (1) EP3824766B1 (fr)
DE (1) DE102019131428B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114027661A (zh) * 2021-11-25 2022-02-11 安吉富和家具有限公司 一种椅子倚靠结构及椅子

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297306B (de) 1965-07-23 1969-06-12 Dare Inglis Products Ltd Kippstuhl
DE10319316A1 (de) 2003-02-18 2004-08-26 Hansen, Eckhard, Dipl.-Ing. Stuhl
EP1989963A1 (fr) 2007-05-07 2008-11-12 Provenda Marketing AG Siège doté d'une assise et d'un dossier
AT506292A4 (de) * 2008-04-22 2009-08-15 Eckhard Dipl Ing Hansen Sitzmöbel
DE102014103780B3 (de) 2014-03-19 2015-06-18 Wilkhahn Wilkening + Hahne Gmbh + Co. Stuhl

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297306B (de) 1965-07-23 1969-06-12 Dare Inglis Products Ltd Kippstuhl
DE10319316A1 (de) 2003-02-18 2004-08-26 Hansen, Eckhard, Dipl.-Ing. Stuhl
EP1989963A1 (fr) 2007-05-07 2008-11-12 Provenda Marketing AG Siège doté d'une assise et d'un dossier
AT506292A4 (de) * 2008-04-22 2009-08-15 Eckhard Dipl Ing Hansen Sitzmöbel
DE102014103780B3 (de) 2014-03-19 2015-06-18 Wilkhahn Wilkening + Hahne Gmbh + Co. Stuhl

Also Published As

Publication number Publication date
DE102019131428B4 (de) 2022-02-03
DE102019131428A1 (de) 2021-05-27
EP3824766B1 (fr) 2022-08-17

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