EP3960032A1 - Chaise - Google Patents

Chaise Download PDF

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Publication number
EP3960032A1
EP3960032A1 EP21188406.9A EP21188406A EP3960032A1 EP 3960032 A1 EP3960032 A1 EP 3960032A1 EP 21188406 A EP21188406 A EP 21188406A EP 3960032 A1 EP3960032 A1 EP 3960032A1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
chair
spring
chair according
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.)
Withdrawn
Application number
EP21188406.9A
Other languages
German (de)
English (en)
Inventor
Michael Englisch
Henning Zöhner
Karsten Siegel
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 EP3960032A1 publication Critical patent/EP3960032A1/fr
Withdrawn legal-status Critical Current

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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
    • A47C1/03255—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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • 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
    • 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
    • A47C1/03288—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with resilient blocks

Definitions

  • the invention relates to a chair with a seat, a backrest, a seat mechanism and a support frame.
  • connection arrangement for a backrest in an office chair wherein the backrest is coupled to a cross-beam element so as to be rotatable about a vertical axis.
  • a connecting section is provided between the transverse support element and the backrest, which is arranged and designed in such a way that the backrest can be moved in a resilient manner relative to the transverse element.
  • the backrest of this known chair therefore also rotates when a user turns sideways.
  • the object of the invention is now to create a chair which on the one hand allows a user a high degree of freedom of movement, but on the other hand also ensures good functionality for heavy and light users.
  • the chair according to the invention provides a seat, a backrest, a seat mechanism and a support frame, the seat and the backrest being connected to the seat mechanism and the support frame carrying the seat mechanism.
  • the backrest is connected to the seat mechanism via a connection module, with the connection module providing a backrest rotation axis extending in a longitudinal center plane of the chair, which enables the backrest to be pivoted laterally transversely to the chair and independently of the seat, by moving the backrest from a central basic position to both sides against the force of at least one resilient restoring element can be deflected, it being further provided that the at least one resilient restoring element interacts with an adjusting element for adjusting the pretension.
  • the lateral pivoting mobility of the backrest increases the user's freedom of movement and thus contributes both to comfort in use and to the avoidance of muscle tension in the user caused by immobile sitting.
  • the lateral deflection also depends above all on the weight of the user, with heavier users having a greater deflection. However, if the deflection is too great, the user can get the uneasy feeling that the chair is no longer holding them. According to the invention, therefore, an adjusting element is provided for adjusting the prestressing of the at least one spring-elastic restoring element.
  • the spring-elastic restoring element can be set with a greater pretension, particularly in the case of heavier users, as a result of which the force for a lateral deflection also increases accordingly.
  • the adjustment element also serves to adjust a central position of the pivotable backrest in the sagittal direction in order to compensate for manufacturing tolerances, e.g. of the spring-elastic restoring elements.
  • the prestressing of the spring-elastic restoring elements is adapted not only for changing users, but also for changing use in different chair models with different requirements.
  • the at least one spring-elastic restoring element has a progressively increasing spring characteristic, as a result of which an increasing force is required with increasing deflection of the backrest. This gives the user the feeling that he is being held securely even in the event of a lateral deflection.
  • the spring-elastic restoring element can preferably be formed by a duroplastic material.
  • connection module with which the backrest is connected to the seat mechanism
  • a chair concept with a modular structure can be realized, which enables a high degree of adaptability to the respective customer needs.
  • different seat mechanisms can be used as required.
  • the independence of the pivoting movement within this connecting module enables a free combination with other functions in the seat, for example an optional independent pivoting of the two seat sides about a seat support rail axis of rotation arranged in a front area of the seat or the chair mechanism and aligned in the transverse direction.
  • the at least one spring-elastic restoring element is operatively connected to an adjustment element guided on the connection module for adjusting the pretension.
  • the connection module has a first connection surface for attaching the backrest and a second connection surface for fastening the connection module to the seat mechanism.
  • the first connection surface can be aligned perpendicular to the axis of rotation of the backrest and the second connection surface can be aligned parallel to the axis of rotation of the backrest. This results in a constructively simple way of storing the backrest pivot axis on the connection module.
  • first and second connection surfaces can be designed as screw-on surfaces with bores in order to enable quick and easy assembly of the connection module on the seat mechanism or the backrest on the connection module.
  • connection module has a pivoting element for connecting the backrest and a support element for attachment to the chair mechanism, the pivoting element being mounted on the support element so that it can pivot about the axis of rotation of the backrest.
  • This construction then also makes it possible for the at least one spring-elastic element to be arranged between the support element and the pivoting element.
  • Two spring-elastic elements are preferably provided, one spring-elastic element being responsible for the inclination to one side and the other spring-elastic element being responsible for the inclination to the other side.
  • connection module and the ability to move the backrest independently of the seat offer the option of designing the seat as a sliding seat, in order to be able to adjust the seat depth for the user.
  • the seat partially overlaps the connecting module in at least one position of use of the chair, preferably by at least 20%, more preferably by at least 40% and most preferably by at least 50%.
  • the seat is optionally designed as a sliding seat, it can be slid between a front and a rear position to adjust the seat depth, with the seat preferably in the front and/or rear position again partially, preferably by at least 20%, more preferably by at least 40% and most preferably at least 50% overlap.
  • the overlap enables a compact structure and at the same time ensures that the seat can be moved to adjust the seat depth.
  • the seat is arranged on two parallel seat support rails extending in the longitudinal direction of the chair, the seat support rails being pivotable independently of one another about an axis of rotation arranged in a front region of the seat and aligned in the transverse direction.
  • This allows the seat to tilt sideways at the rear, causing the seat to twist.
  • the ones in the front Pivotally articulated seat support rails are expediently spring-mounted in the rear area, so that a deflection takes place depending on the load exerted by the user.
  • the seat is designed as a sliding seat, it can be expediently moved on the seat support rails to adjust the seat depth, with notches being able to specify specific seat depths.
  • any desired seat depth between a minimum and a maximum seat depth could be set using suitable clamping means.
  • the seat mechanism allows in particular an upright basic position with a substantially horizontal seat and vertical backrest and a reclined position with the backrest tilted backwards and the seat tilted backwards and downwards. It has been found to be advantageous if the backrest tilts about twice as much as the seat.
  • This seat mechanism can then have a return spring, with the chair being adjustable by a user against the force of the return spring from the upright basic position to the reclined position and with the force of the return spring from the reclined position to the upright basic position.
  • the chair shown has a seat 1, a backrest 2, a seat mechanism 3 and a support frame 4, the seat 1 and the backrest 2 being connected to the seat mechanism 3 and the support frame 4 carrying the seat mechanism 3.
  • the backrest 2 is connected to the seat mechanism 3 via a connection module 5, the seat mechanism 3 being in an upright basic position ( 1 ) with a substantially horizontal seat 1 and vertical backrest 2 and a reclined position ( 2 ) with the backrest 2 reclined and the seat 1 reclined and lowered.
  • the seat 1 is held at a front end about a front axis of rotation 9 on a base support 30 of the seat mechanism 3 .
  • the seat 1 In its rear area, the seat 1 is articulated with a hinge axis 10 on a swiveling lever 31 of the seat mechanism 3 , the swiveling lever 31 in turn being mounted on the base support 30 so as to be swivelable about a rear axis of rotation 11 .
  • the seat mechanism 3 has at least one restoring spring, not shown in detail, wherein the chair 1 can be moved from the upright basic position ( 1 ) to the reclined position ( 2 ) and can be adjusted from the reclined position to the upright basic position with the force of the return spring.
  • the restoring spring can be implemented, for example, in that the rear axis of rotation 11 is designed as a torsion spring shaft.
  • a solution using a compression or tension spring would also be conceivable.
  • the pivoting lever 31 has a support plate 31a for connecting the connection module 5 to which the backrest 2 is attached, so that the pivoting lever 31 can be pivoted about the rear axis of rotation 11 from the upright basic position 1 into the reclined position according to 2 on the one hand a movement of the seat 1 backwards and downwards and an inclination of the backrest 2 causes.
  • the lever ratios of the articulated lever 31 and the arrangement of the rotary and articulated axes 9, 11 and 10 are dimensioned in such a way that a synchronous mechanism results in which the backrest 2 tilts about twice as much as the seat 1.
  • connection module 5 has a pivoting element 50 with a first attachment surface 51 for attachment to the backrest 2 and a support element 52 with a second attachment surface 53 for attachment to the pivoting lever 31 of the seat mechanism 3 .
  • the swiveling element 50 is held on the support element 52 via a pivot pin connection 54 so as to be swivelable about a backrest axis of rotation 6 .
  • a bushing 54a is provided on the support element 52 and two bolt lugs 54b are provided on the pivoting element, with the bushing 54a and the two bolt lugs 54b being aligned with one another in the assembled state and a bolt 54c being able to be inserted and fastened through the bushing 54a and the two bolt lugs 54b.
  • the bolt 54c can have an external thread 54d at one end, which interacts with an internal thread provided on one of the bolt brackets 54b for fixing the bolt 54c.
  • the pivoting element 50 In the assembled state, the pivoting element 50 can be pivoted relative to the support element 52 about the bolt 54c, which defines the axis of rotation 6 of the backrest.
  • connection surface 51 is oriented perpendicularly to the axis of rotation 6 of the backrest and the second connection surface 53 is oriented parallel to the axis of rotation 6 of the backrest.
  • Both connection surfaces 51, 53 are designed as screw-on surfaces with bores to enable easy assembly.
  • the backrest 2 attached to the pivoting element 50 can be pivoted laterally about the backrest axis of rotation 6, ie transversely to the chair, and independently of the seat 1 by the backrest 2 being moved from a central basic position in accordance with Fig.5 can be deflected on both sides against the force of a spring-elastic restoring element 7, 8 ( 6 ).
  • a spring-elastic restoring element 7 or 8 is provided for each side. In principle, however, only one spring element would be conceivable, which can be loaded on opposite sides.
  • the two spring-elastic elements 7, 8 are arranged between the support element 52 and the pivoting element 50, with the backrest axis of rotation 6 being arranged between the two spring-elastic elements 7, 8.
  • the resilient restoring elements 7, 8 have a progressively increasing spring characteristic 12 ( 7 ) and are formed, for example, from a thermosetting material.
  • Adjusting elements 13, 14 are also provided, which interact with the spring-elastic restoring elements 7, 8 to adjust the prestress.
  • the adjusting elements 13, 14 are designed as screws that are guided in threaded holes on the pivoting element 50.
  • the adjusting elements 13, 14 act either directly or indirectly, for example via pressure plates 15, 16, on the spring-elastic restoring elements 7, 8 in order to be able to adjust the pretension.
  • the spring characteristic curve 17 results from an increased preload, with this setting in particular is suitable for heavier users of the chair, while the spring characteristic 12 (without preload) comes into consideration for lighter users.
  • connection module 5 in plan view.
  • the dashed lines 55, 56 indicate the expansion of the connection module 5, it being evident that the seat 1 covers the connection module 5 practically completely, resulting in a particularly compact design.
  • the Figures 8 and 9 show an optional embodiment of the chair, in which the seat 1 is designed as a sliding seat in order to be able to adjust the seat depth.
  • 8 shows the setting with the greatest possible seat depth, in which the seat 1 is in a forward position in relation to the seat mechanism 3 and the backrest 2, while in 9 the smallest seat depth is shown, in which the seat 1 is in a rear position, the backrest or the associated backrest support being recessed in the area of the seat so that the seat 1 can be pushed into the backrest ( 9 ).
  • the seat 1 overlaps the connection module 5 practically completely. In the rear position, the seat 1 clearly protrudes beyond the connecting module 5.
  • the seat 1 is arranged on two parallel seat support rails 18, 19 extending in the longitudinal direction of the chair, the seat support rails 18, 19 being arranged independently of one another around a seat support rail which is arranged in a front region of the seat 1 or the chair mechanism 3 and is aligned in the transverse direction.
  • Axis of rotation 20 are pivotable.
  • the seat support rails 18, 19 are spring-mounted in the vertical direction, the mobility being limited by a slotted-bolt connection 21.
  • the (left) seat support rail 19 is lowered while the (right) seat support rail is in its upper position.
  • the one on the The seat 1 mounted on the seat support rails 18, 19 will twist slightly to allow the seat 1 to recline sideways. If the user is in contact with the backrest 2 at the same time, it can also swivel to the left side and thus adapt to the movement of the user on the chair.
  • the seat support rails 18, 19 not only enable the seat 1 to be pivoted to the side, but are also suitable for realizing the sliding seat, in that the seat 1 can be slid on the seat support rails 18, 19 to adjust the seat depth, with notches 22 being provided which a not shown detent cooperate to fix a certain seat depth.
EP21188406.9A 2020-08-25 2021-07-29 Chaise Withdrawn EP3960032A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020122133.9A DE102020122133B4 (de) 2020-08-25 2020-08-25 Stuhl

Publications (1)

Publication Number Publication Date
EP3960032A1 true EP3960032A1 (fr) 2022-03-02

Family

ID=77126612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21188406.9A Withdrawn EP3960032A1 (fr) 2020-08-25 2021-07-29 Chaise

Country Status (2)

Country Link
EP (1) EP3960032A1 (fr)
DE (1) DE102020122133B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021124418A1 (de) 2021-09-21 2023-03-23 Recaro Aircraft Seating Gmbh & Co. Kg Flugzeugsitzvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6059363A (en) * 1997-04-30 2000-05-09 Haworth, Inc. Chairback with side torsional movement
DE102014006058A1 (de) 2014-04-26 2015-10-29 Grupo Forma 5, S.L.U. Bürostuhl mit Synchronmechanik
DE102015216058A1 (de) * 2015-08-21 2017-02-23 Armin Sander Bürostuhl
EP3443866A1 (fr) 2017-08-16 2019-02-20 Sedus Stoll AG Dispositif de raccordement pour un dossier et siège de bureau ou de conférence

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5951109A (en) 1997-04-30 1999-09-14 Haworth, Inc. Chairback with side torsional movement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6059363A (en) * 1997-04-30 2000-05-09 Haworth, Inc. Chairback with side torsional movement
DE102014006058A1 (de) 2014-04-26 2015-10-29 Grupo Forma 5, S.L.U. Bürostuhl mit Synchronmechanik
DE102015216058A1 (de) * 2015-08-21 2017-02-23 Armin Sander Bürostuhl
EP3443866A1 (fr) 2017-08-16 2019-02-20 Sedus Stoll AG Dispositif de raccordement pour un dossier et siège de bureau ou de conférence

Also Published As

Publication number Publication date
DE102020122133A1 (de) 2022-03-03
DE102020122133B4 (de) 2022-04-07

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