EP3437519B1 - Mécanisme basculant - Google Patents

Mécanisme basculant Download PDF

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Publication number
EP3437519B1
EP3437519B1 EP18000637.1A EP18000637A EP3437519B1 EP 3437519 B1 EP3437519 B1 EP 3437519B1 EP 18000637 A EP18000637 A EP 18000637A EP 3437519 B1 EP3437519 B1 EP 3437519B1
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EP
European Patent Office
Prior art keywords
seat support
chair
support
pivoted
pivot axis
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
EP18000637.1A
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German (de)
English (en)
Other versions
EP3437519A1 (fr
Inventor
Hermann Bock
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.)
Bock 1 GmbH and Co KG
Original Assignee
Bock 1 GmbH and Co KG
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Publication date
Application filed by Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Publication of EP3437519A1 publication Critical patent/EP3437519A1/fr
Application granted granted Critical
Publication of EP3437519B1 publication Critical patent/EP3437519B1/fr
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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
    • 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
    • A47C3/0255—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame pivotally mounted in the base frame, e.g. swings

Definitions

  • the invention relates to a rocker mechanism and a chair with a rocker mechanism, preferably a visitor or conference chair.
  • Rocker mechanisms are known from the prior art. These are comparatively simple assemblies in the seat substructure of chairs, in which the backrest support is rigidly connected to the seat support, the seat or the frame of the chair. The resulting seat support-backrest support combination can be pivoted backwards about a pivot axis extending transversely to the longitudinal direction of the chair by means of the rocker mechanism when the user of the chair is leaning against the backrest.
  • Such rocker mechanisms are often used instead of synchronous mechanisms in inexpensive visitor or conference chairs in order to implement a simple rocker function there.
  • An object of the invention is to avoid these disadvantages and to provide a chair which has a small rocking mechanism.
  • the rocker mechanism should also have a simple construction.
  • the rocking mechanism accordingly comprises a base support which has a cone receptacle with the aid of which it can be placed on a chair column of the chair, and a seat support which is pivotally connected to the base support via a pivot axis which is transverse to the longitudinal direction of the chair and is arranged eccentrically in the longitudinal direction of the chair , wherein the seat support can be pivoted both backwards and forwards.
  • the swivel axis is arranged in the longitudinal direction of the chair in the front area of the base support.
  • the rocking mechanism comprises a number of spring elements, which interact with the seat support on the one hand and with the base support on the other hand, for returning the seat support from a pivoted position to a starting position.
  • the number of spring elements seen in the longitudinal direction of the chair is arranged on both sides of the swivel axis and asymmetrically to the swivel axis.
  • rocking mechanism Since the spring elements are arranged asymmetrically to the pivot axis, a comparatively small rocking mechanism can be provided. At the same time, it is possible to make the structure structurally simple.
  • the rocking mechanism according to the invention can therefore be used particularly advantageously if only a limited installation space is available and / or a particularly simple construction is desired for reasons of cost.
  • the proposed rocking mechanism differs from the one-way pivoting mechanisms known from the prior art in that pivoting (lowering, tilting, rocking or tilting) of the seat support in the manner of a rocker is possible on both sides, i.e. both to the rear and to the front.
  • the proposed rocking mechanism differs from the mechanisms which can be pivoted on both sides from the prior art by the asymmetrical arrangement of the spring elements. While with the previous rocker mechanisms, the springs must always be arranged symmetrically to the swivel axis, as seen in the longitudinal direction of the chair, since otherwise the mechanical system, or more precisely the seat support in the initial position, will inevitably result, this is not the case with the rocker mechanism proposed here.
  • the structural restrictions existing in this regard in the prior art no longer apply. Since a symmetrical structure of the mechanics is no longer necessary, various design solutions can now be implemented, the implementation of which was previously impossible due to the constructional limitations mentioned.
  • the in Fig. 1 The conference chair 100 shown has a rocking mechanism 10, the rocking mechanism 10 being constructed with mirror symmetry with respect to its central longitudinal plane, as far as the actual kinematics are concerned. In this respect, the following description is generally based on construction elements of the rocking mechanism 10 which are present in pairs on both sides.
  • the rocking mechanism 10 comprises a fixed base support 1 which is placed on the upper end of a chair column 3 of the conference chair 100 by means of a cone receptacle 2.
  • the immovable base support 1 is essentially plate-shaped.
  • a seat support 4 is provided, which is also essentially plate-shaped and is directly or indirectly connected to a backrest support 5 with its rear end.
  • the seat 6 carried by the seat support 4 and the backrest 7 carried by the backrest support 5 are only shown in FIG Fig. 1 indicated, but omitted in the further figures for reasons of clarity.
  • the seat support 4 is pivotally connected to the base support 1 in the front region of the base support 1, as seen in the longitudinal direction 9 of the chair.
  • This is preferably the only pivot axis 8 that connects the seat support 4 to the base support 1.
  • this pivot axis 8 is preferably the only connection between Seat support 4 and base support 1.
  • the entire seat 6 together with the backrest 7 can be pivoted forwards and backwards relative to the base support 1 fixedly mounted on the chair column 8. Swiveling forward about the only swivel axis 8 means tilting the seat support 4 and thus all components connected to the seat support 4 forwards, in other words lowering the front area of the seat support 4 or the front edge 12 of the seat support.
  • Swiveling about the single swivel axis 8 to the rear means a tilting of the seat support 4 and thus all components connected to the seat support 4 to the rear, in other words a lowering of the rear area of the seat support 4 or the rear edge of the seat support 13 Fig. 2 a starting position is shown, in which the seat support 4 assumes an essentially horizontal position.
  • Fig. 3 shows a rocker mechanism 10 in a position pivoted forward as far as possible
  • Fig. 4 shows this rocking mechanism 10 in a position pivoted backwards as far as possible.
  • the pivot axis 8 viewed in the longitudinal direction 9 of the chair, is arranged eccentrically with respect to the base support 1. This results in an asymmetrical structure of the mechanism 10 in the longitudinal direction 9 of the chair, ie an asymmetrical arrangement of the pivot axis 8 and / or the number of spring elements.
  • the eccentric arrangement results in increased seating comfort for the user. Assuming an approximately central arrangement of the cone receptacle 2 in the base support 1, the pivot axis 8 is accordingly arranged next to the cone receptacle 2 as seen in the longitudinal direction 9 of the chair.
  • the pivot axis 8 is seen in the longitudinal direction 9 of the chair, with respect to the base support 1, arranged in the front region of the mechanism 10 or in the front half of the mechanism 10 or in other words closer to the front end 14 of the base support 1 than to the rear end thereof End 15.
  • the pivot axis 8 is arranged in front of the cone receptacle 2 in the longitudinal direction 9 of the chair.
  • the advantage of the arrangement of the pivot axis 8 in the front area is that there is no or at least only a comparatively slight lifting of the front edge 12 of the seat support when the seat-backrest combination is pivoted to the rear.
  • the installation space of the mechanism 10 is better utilized.
  • the available installation space can, if necessary, be used for other functions of the mechanism 10.
  • the asymmetrical arrangement of the pivot axis 8 results in more design options for the design of the chair 100 compared to a symmetrical arrangement.
  • the position of the pivot axis 8 of the mechanism 10 is defined, for example, by a bolt 16 which is fixedly connected to the seat support 4 and is mounted in two bearings 17 provided on the base support 1.
  • the bearings 17 are arranged offset to the cone receptacle 2 in such a way that the pivot axis 8 extending transversely to the longitudinal direction 9 of the chair, viewed in the longitudinal direction 9 of the chair, is arranged next to the cone receptacle 2, namely in front of the cone receptacle 2.
  • These spring elements 18, 28 are seen in the longitudinal direction 9 of the chair on both sides of the pivot axis 8, i.e. arranged in front of and behind the pivot axis 8.
  • these spring elements 18, 28 are arranged asymmetrically to the pivot axis 8, as seen in the longitudinal direction 9 of the chair. This means that the springs 18, 28 have different distances from the pivot axis 8 in the longitudinal direction 9.
  • At least one front spring element 18 arranged in front of the pivot axis 8 as seen in the longitudinal direction 9 of the chair and at least one rear spring element 28 arranged behind the pivot axis 8 as viewed in the longitudinal direction 9 of the chair are provided, the front spring element 18 being used only when the seat support 4 is pivoted to the front and the rear spring element 28 is only acted upon by the seat support 4 when the seat support 4 is pivoted rearward.
  • the functions of the springs 18, 28 are thus clearly separated.
  • the rear spring element 28 is used solely, ie exclusively, to adjust the pivoting resistance when the seat carrier 4 is pivoted backwards and for returning the seat carrier 4 from the rear, that is to say from the position tilted backwards, back into the non-pivoted starting position.
  • the front spring element 18 is used solely, ie exclusively, to define the pivoting resistance when the seat carrier 4 is pivoted forwards and for returning the Seat carrier 4 from the front, that is, from the position tilted forward downward, back to the non-pivoted starting position.
  • a single spring element 18, 28 can be arranged both at the front and at the rear, which then preferably lies in the central longitudinal plane of the mechanism 10.
  • a plurality of spring elements 18, 28 are provided at the front and / or rear, preferably designed as elements of a single spring assembly, the springs of which are arranged, for example, to the right and left of the central longitudinal plane, but at the same distance from the pivot axis 8.
  • the rear spring element 28 is a compression spring, more precisely a helical compression spring.
  • the rear spring element 28 engages on the one hand directly or directly on a contact piece 19 of the seat support 4 and on the other hand on a counterpart 20 which is movably connected to the seat support 4 to form a rotational degree of freedom and is between these two components 19, 20 biased, the contact piece 19 in the helical spring 28 used in this example being designed as an upper spring plate 31 and the counterpart 20 as a lower spring plate 32.
  • the contact piece 19 can be designed only as an integrated part of the seat support 4 or as a separate component which is firmly connected to the seat support 4.
  • the rear spring 28 engages with its upper spring end 29 pointing in the direction of the seat support 4 directly, possibly via a suitable spring receiving or spring mounting element (not shown) on the seat support 4, while it has its lower spring end pointing in the direction of the base support 1 30 engages a counterpart 20 arranged between the seat support 4 and the base support 1.
  • This counterpart 20 which has the lower spring plate 32 or another suitable spring receiving or spring mounting element, is connected in an articulated manner to the seat support 4 and is tilted upward when the seat support 4 is tilted forward, i.e. away from the base support 1.
  • the counterpart 20 lies, for example, with a horizontal cross pin 21 in a receptacle 22 of the seat support 4, shaped in the manner of a bracket and starting from the underside of the seat support 4 and shaped downward in the direction of the base support 1, with a rotational degree of freedom.
  • the cross pin 21 is connected to the lower spring plate 32 via a web 23 running in the longitudinal direction of the spring. Both the bracket 22 and the web 23 with the bolt 21 are located in the interior 24 of the coil spring 28.
  • a vertical guide 25 provided for this purpose serves to ensure that the counterpart 20 with the rear spring element 28, which is carried forward by the seat support 4 when pivoted, and upwards away from the base support 1 is moved, is not removed uncontrollably from the base support 1. Instead, the vertical guidance ensures 25 that the spring element 28 again finds its original position on the base support 1 when the seat support 4 is returned to the neutral starting position.
  • the counterpart 20 when the seat support 4 is pivoted forwards, the counterpart 20 lifts at least partially from the base support 1 and / or the spring element 28 bends along its longitudinal axis. However, the counterpart 20 never loses reference to the base support 1.
  • the vertical guide 25 can be implemented, for example, by a tongue and groove combination or the like.
  • a guide pin 26 designed as part of the base support 1 and extending from the top of the base support 1 in the direction of the seat support 4 lies in a corresponding opening 27 on the underside or inside of the counterpart 20, the guide pin 26 being as long and the opening 27 is so deep that the pin 26 does not leave the opening 27 even when the seat support 4 is pivoted maximally forward, see Fig. 3 ,
  • the rear spring element 28 In the non-pivoted starting position, the rear spring element 28 is prestressed and is supported upwards on the seat support 4. At the same time, the rear spring element 28 presses the counterpart 20 downward against the base support 1. As a result, the seat support 4 is held in its non-pivoted starting position, in which the seat support 4 is arranged essentially horizontally in the illustrated example. Taking and leaving this starting position is noticeable for the user.
  • the front spring element 18 which is also functionally designed as a compression spring in accordance with the mode of operation of the rear spring element 28, is not preloaded. In the non-pivoted starting position, the seat support 4 lies more or less force-free on the front spring element 18. In other words, there is no or no significant loading of the front spring element 18 by the seat support 4 in the zero position.
  • the front spring element 18 is preferably a solid block made of a suitable elastic plastic material, e.g. an elastomer.
  • the front spring 18 is placed so that it acts directly between the base support 1 and seat support 4.
  • the front spring element 18 is compressed when the seat support 4 is pivoted forward. When the user stands up, it serves to independently reset the seat support 4 into its initial position.
  • a defined restoring force acts in accordance with the design of the spring 18.
  • the forward swivel angle is limited by separate stop elements on base support 1 and / or seat support 4, these stop elements preferably being arranged in the longitudinal direction 9 of the chair in front of the front spring element 18 (not shown).
  • the spring rate 34 of the front spring element 18 can differ from the spring rate 33 of the rear spring element 28, see Fig. 5 , so that when the seat support 4 is pivoted forward, a different pivoting resistance is present and can be felt by the user of the chair than when the seat support 4 is pivoted rearward.
  • the size of the bias 35 of the rear spring element 28 can vary depending on the application.
  • the rearward tilting movement is limited by separate stop elements on base support 1 and / or seat support 4, these stop elements preferably being arranged in the longitudinal direction 9 of the chair behind the rear spring element 28 (not shown).

Claims (6)

  1. Mécanisme à bascule (10) destiné à une chaise (100), le mécanisme à bascule comprenant
    - un support de base (1) qui comporte un logement conique (2) qui permet de placer ledit support de base sur une colonne (3) de la chaise (100),
    - un support de siège (4) relié de manière pivotante au support de base (1) par le biais d'un axe de pivotement (8) s'étendant transversalement à la direction longitudinale (9) de la chaise et disposé de manière excentrée par référence à la direction longitudinale (9) de la chaise,
    le support de siège (4) pouvant pivoter vers l'arrière et vers l'avant, et
    - un certain nombre d'éléments à ressort (18, 28) qui coopèrent d'une part avec le support de siège (4) et d'autre part avec le support de base (1) pour ramener le support de siège (4) d'une position pivotée dans une position de départ,
    le nombre d'éléments à ressort (18, 28) étant disposés des deux côtés de l'axe de pivotement (8) et de manière asymétrique par rapport à l'axe de pivotement (8) par référence à la direction longitudinale (9) de la chaise, caractérisé en ce que l'axe de pivotement (8) est disposé dans la région avant du support de base (1) par référence à la direction longitudinale (9) de la chaise.
  2. Mécanisme à bascule (1) selon la revendication 1, au moins un élément à ressort avant (18) étant prévu qui est disposé devant l'axe de pivotement (8) par référence à la direction longitudinale (9) de la chaise et au moins un élément à ressort arrière (28) étant prévu qui est disposé derrière l'axe de pivotement (8) par référence à la direction longitudinale (9) de la chaise, l'élément à ressort avant (18) étant sollicité exclusivement lors du pivotement du support de siège (4) vers l'avant et l'élément à ressort arrière (28) étant sollicité exclusivement lors du pivotement du support de siège (4) vers l'arrière du support de siège (4) .
  3. Mécanisme à bascule (10) selon la revendication 1 ou 2, l'élément à ressort arrière (28) s'engageant d'une part sur une pièce d'appui (19) du support de siège (4) et d'autre part sur une pièce homologue (20) reliée de manière mobile au support de siège (4) et étant précontraint entre ces deux composants (19, 20).
  4. Mécanisme à bascule (10) selon l'une des revendications 1 à 3, la pièce homologue (20) se soulevant au moins partiellement du support de base (1) lors du pivotement du support de siège (4) vers l'avant.
  5. Mécanisme à bascule (10) selon l'une des revendications 1 à 4, la pièce homologue (20) venant en appui sur le support de base (1) servant de butée lors du pivotement du support de siège (4) vers l'arrière.
  6. Chaise comprenant un mécanisme à bascule selon l'une des revendications 1 à 5.
EP18000637.1A 2017-08-05 2018-07-31 Mécanisme basculant Active EP3437519B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017117806.6A DE102017117806A1 (de) 2017-08-05 2017-08-05 Wippmechanik

Publications (2)

Publication Number Publication Date
EP3437519A1 EP3437519A1 (fr) 2019-02-06
EP3437519B1 true EP3437519B1 (fr) 2020-01-29

Family

ID=63113312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18000637.1A Active EP3437519B1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant

Country Status (2)

Country Link
EP (1) EP3437519B1 (fr)
DE (1) DE102017117806A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT525504A1 (de) * 2021-09-22 2023-04-15 Joka Kapsamer Gmbh Sitzmöbel mit einer Aufstehhilfe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2022525A1 (de) * 1970-05-08 1971-11-25 Vogel Ignaz Kg Schaukellagerung
NO160406C (no) * 1987-01-23 1989-04-19 Opsvik Peter As Vippemekanisme, fortrinnsvis for stolsete eller lignende.
GB2340746B (en) * 1998-07-27 2002-02-13 Ashfield Eng Co Wexford Ltd A chair
US20070252419A1 (en) * 2004-09-03 2007-11-01 Yukie Takahashi Seating Mechanism and Chair
GB2513153B (en) * 2013-04-17 2015-06-03 Deep Thought Ltd Improvements in office furniture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102017117806A1 (de) 2019-02-07
EP3437519A1 (fr) 2019-02-06

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