EP3437520B1 - Mécanisme basculant - Google Patents

Mécanisme basculant Download PDF

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Publication number
EP3437520B1
EP3437520B1 EP18000638.9A EP18000638A EP3437520B1 EP 3437520 B1 EP3437520 B1 EP 3437520B1 EP 18000638 A EP18000638 A EP 18000638A EP 3437520 B1 EP3437520 B1 EP 3437520B1
Authority
EP
European Patent Office
Prior art keywords
spring
seat support
support
chair
base 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
EP18000638.9A
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German (de)
English (en)
Other versions
EP3437520A1 (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
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 Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Priority to EP19000372.3A priority Critical patent/EP3590389A1/fr
Publication of EP3437520A1 publication Critical patent/EP3437520A1/fr
Application granted granted Critical
Publication of EP3437520B1 publication Critical patent/EP3437520B1/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
    • 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 simply structured 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 by means of the rocking mechanism about a pivot axis running transversely to the longitudinal direction of the chair when the user of the chair leans against the backrest. Such rocking mechanisms are often used instead of synchronous mechanisms in inexpensive visitor or conference chairs in order to implement a simple rocking function there.
  • rocking mechanisms of this type are often constructed very simply, they are not designed to be very space-saving, mostly for reasons of cost. On the contrary, they often require a comparatively large installation space, so that they can be recognized as an assembly clearly visible from the outside in the seat substructure. This results in disadvantages from both an aesthetic and a constructive point of view.
  • EP 0 281 749 A1 describes a rocking mechanism that requires a comparatively large installation space.
  • the spring element used viewed in the longitudinal direction of the chair, is arranged exclusively on one side of the pivot axis connecting the base support to the seat support.
  • One object of the invention is to avoid the above-mentioned disadvantages and to provide a chair which has a small rocking mechanism.
  • the rocking mechanism should preferably also be of simple construction.
  • the rocking mechanism accordingly comprises a base support which has a conical receptacle with the help of which it can be placed on a chair column of the chair, as well as a seat support which is pivotably connected to the base support via a pivot axis extending transversely to the longitudinal direction of the chair, the seat support both in the direction of can be pivoted back and forward.
  • the rocking mechanism comprises at least one spring element, which interacts with the seat support on the one hand and with the base support on the other, for returning the seat support from a pivoted position to an initial position.
  • the at least one spring element viewed in the longitudinal direction of the chair, is arranged exclusively on one side of the pivot axis.
  • rocking mechanism that is compact and at the same time relatively simple in terms of construction can be provided.
  • the rocking mechanism according to the invention can therefore be used particularly advantageously when only a limited installation space is available and / or a particularly simple structure is desired for reasons of cost.
  • the proposed rocker mechanism differs from the one-sided pivoting mechanisms known from the prior art in that the seat support can be pivoted (lowering, tilting, rocking or tilting) in the manner of a rocker to both sides, i.e. both backwards and forwards is.
  • the proposed rocker mechanism differs from the bilateral pivotable mechanisms known from the prior art in that the spring elements are arranged on one side in relation to the position of the pivot axis. While in the known bilaterally pivotable rocker mechanisms, spring elements must always be provided on both sides of the pivot axis, i.e. in front of and behind the pivot axis as seen in the longitudinal direction of the chair, this is not the case with the rocker mechanism according to the invention.
  • the proposed construction allows the use of spring elements only on one side of the pivot axis, without this leading to a reduced functionality of the rocker mechanism.
  • rocker mechanism according to the invention, a single spring element or a single spring package is sufficient, while with the known rocker mechanisms that pivot on both sides, a single spring element is never sufficient, but instead always several, spatially separated, clearly spaced spring elements are required to achieve the to realize the desired rocking function.
  • the bilateral pivotability with only one-sided arrangement of the spring elements is achieved in that a spring is arranged in a spring retainer which is moved with the seat support and has several mutually movable parts, at least one part of the spring retainer cooperating with the base carrier. According to the invention, both the movement of the spring receiving parts relative to one another and the movement of the spring receiving element relative to the base support are limited by stops.
  • the in Fig. 1 The conference chair 100 shown has a rocker mechanism 10, the rocker mechanism 10 with respect to its The central longitudinal plane, as far as the actual kinematics are concerned, is mirror-symmetrical. In this respect, the following description should generally be based on construction elements of the rocker mechanism 10 that are present in pairs on both sides.
  • the rocker mechanism 10 comprises a stationary base support 1 which is placed on the upper end of a chair column 3 of the conference chair 100 by means of a conical mount 2.
  • the immovable base support 1 is constructed essentially in the form of a plate.
  • a seat support 4 is provided, which is also constructed essentially in the form of a plate and is connected with its rear end directly or indirectly to a backrest support 5.
  • 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 the sake of clarity.
  • the seat support 4 is pivotably connected to the base support 1 via a pivot axis 8 in the front area of the base support 1, as seen in the chair longitudinal direction 9.
  • This is preferably the only pivot axis 8 that connects the seat support 4 to the base support 1.
  • This pivot axis 8, apart from the at least one spring element, is preferably the only connection between the seat support 4 and the base support 1.
  • the entire seat 6 including the backrest 7 can be moved forwards and backwards relative to the base support 1 fixedly mounted on the chair column 3 be pivoted. Pivoting forward about the single pivot 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 seat support front edge 12.
  • Pivoting around the single pivot axis 8 means to the rear 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 seat support rear edge 13.
  • Figs. 2 and 3 an initial position is shown in which the seat support 4 assumes a substantially horizontal position.
  • Fig. 4 shows a rocker mechanism 10 in a maximally forwardly pivoted position
  • Fig. 5 shows this rocker mechanism 10 in a position that is pivoted backwards to the maximum.
  • 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, i.e. an asymmetrical arrangement of the pivot axis 8 and / or the spring elements. In contrast to the rocking mechanisms known from the prior art, in which the main pivot axis is necessarily arranged centrally, the eccentric arrangement results in increased seating comfort for the user. If one assumes an approximately central arrangement of the conical receptacle 2 in the base support 1, the pivot axis 8 is accordingly arranged next to the conical receptacle 2 as seen in the longitudinal direction 9 of the chair.
  • the pivot axis 8 is seen in the chair longitudinal direction 9, based on 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 at the rear end 15 thereof.
  • the pivot axis 8 is arranged in front of the cone receptacle 2 as seen in the longitudinal direction 9 of the chair.
  • the advantage of arranging 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 backwards.
  • the installation space of the mechanism 10 is better used.
  • the available installation space can optionally be used for other functions of the mechanism 10.
  • the asymmetrical arrangement of the pivot axis 8 compared to a symmetrical arrangement results in more design options for designing the chair 100.
  • the position of the pivot axis 8 of the mechanism 10 is defined, for example, by a bolt 16 firmly connected to the seat support 4, which 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 running transversely to the chair longitudinal direction 9 is arranged next to the cone receptacle 2, namely in front of the cone receptacle 2, as seen in the chair longitudinal direction 9.
  • the spring elements 18, 28 are arranged behind the pivot axis 8 as seen in the longitudinal direction 9 of the chair. In connection with a pivot axis 8 arranged in front of the cone receptacle 2 as seen in the longitudinal direction 9 of the chair, the spring elements 18, 28 are thus located next to the cone receptacle 2, preferably behind the cone receptacle 2.
  • a first exemplary embodiment of the rocking mechanism 10 according to the invention is described in more detail below.
  • the spring element 18 or the number of spring elements 18, which are supported with their spring ends on the base support 1 and on the seat support 4, are double-acting, that is, can be subjected to both tension and compression Springs 18, see Fig. 2 .
  • These have a spring end shape adapted to the application.
  • the spring element 18 is connected with its spring ends 19 to the base support 1 and / or the seat support 4 via screwed-in spring receiving elements 20.
  • These screwed-in assembly elements (for example in the form of threaded plugs) can be separate components or components integrated in the base support 1 or the seat support 4.
  • springs 18 with rolled-up assembly elements can also be used for assembly on the base support 1 or seat support 4.
  • spring ends 19 are screwed in or rolled up, not all turns of the spring 18 are resilient; the total number of turns must be adapted accordingly.
  • This example is characterized by a particularly simple structure, since only a single spring element 18, which is arranged between the seat support 4 and the base support 1 in the central longitudinal plane of the mechanism 10, is necessary, or a single spring package, the springs of which, for example, to the right and left of the central longitudinal plane, but at the same distance from the pivot axis 8, are arranged.
  • the pivoting forwards or backwards is either limited by the spring 18 itself, for example because its maximum expansion or compression has been reached or the spring rate is selected such that additional mechanical stops are not required; or the tilting or tilting movement of the seat support 4 or the seat support / backrest support combination is brought about by additional mechanical stops 23, 24 on the seat support 4 and / or the base support 1.
  • the double-acting spring 18 is preferably a double-acting spiral spring, more precisely a cylindrical helical spring which can be subjected to tension and compression. This is a spring 18 with turns that are not adjacent to one another. In other words, the pitch of the spring must be so great that (viewed from the side) adjacent turns have a suitable minimum distance 21 from one another in order to provide the desired functionality.
  • the spring rate 22 of the spring 18 or the spring assembly is the same in tension and compression, so that both in one When the seat support 4 is pivoted forward and when the seat support 4 is pivoted backward, the same pivoting resistance is always present and can be felt by the user of the chair 100, see Fig. 6 .
  • helical springs 18 As an alternative to the helical springs 18 shown here, other suitable, i.e. double-acting, spring elements can also be used, for example massive blocks made of elastic plastic material, which are attached to the seat support and the base support via suitable connections or are placed between them.
  • rocker mechanism 10 A second exemplary embodiment of the rocker mechanism 10 according to the invention is described in more detail below.
  • the at least one spring element 28 is placed in a spring holder 25 (spring holding and spring holding device) which is pivotably attached to the seat support 4 and thus moves with the seat support 4 and encompasses the spring 28, see Fig. 3 .
  • This spring receptacle 25 has a plurality of parts 26, 27 that are movable relative to one another, at least one (outer) part 26 of the spring receptacle 25 cooperating with the base support 1.
  • the spring element 28 is supported with its two ends 29, 30 in the spring receptacle 25, namely on different parts of the spring receptacle 25, whereby these are those parts 26, 27 of the spring receptacle 25 that are movable relative to one another. By moving these parts 26, 27 towards one another, the spring 28 is acted upon.
  • the spring 28 is a compression spring, more precisely a helical compression spring.
  • the spring ends 29, 30 act on spring plates 31, 32 (or other suitable components), which are designed as components of the respective spring receiving parts 26, 27 and which are not directly connected to either the seat support 4 or the base support 1.
  • the spring 28 presses with its upper end 29 pointing in the direction of the seat support 4 against one part 26 of the spring receptacle 25, while at the same time it presses with its lower end 30 pointing in the direction of the base support 1 against the other part 27 of the spring receptacle 25.
  • the two parts 26, 27 of the spring receptacle 25 are connected or coupled to one another exclusively via the spring 28.
  • both spring plates 31, 32 are movable, namely in the direction of the base support 1 or seat support 4 towards or away from the base support 1 or seat support 4, i.e. their position in the space between base support 1 and seat support 4 can be changed.
  • both the movement of the spring receiving parts 26, 27 with respect to one another and the movement of the spring receiving means 25 relative to the base support 1 are limited by stops 34, 35.
  • the lower spring end 30 which receives the lower spring end 30, which is directed towards the base support beats from the lower end 30 of the spring 28 in the direction of the base support 1 acted upon lower spring plate 32 or that (inner) spring receiving part 27, which comprises this lower spring plate 32, forming a first stop 34 against a movable, movable part 36 of the seat support 4, see Fig. 3 and 4th , whereby a stationary first stop 34 is formed.
  • This first stop 34 prevents a (further) change in position of the lower spring end 30 in the direction of the base support 1.
  • This part 36 of the seat support 4 in its function as a driver for the lower spring plate 32 can also be viewed as part of the spring receptacle 25.
  • the lower spring plate 32 or the spring receiving part 27 comprising this spring plate 32 is connected to a plunger 37 pointing in the direction of the seat support 4, which strikes against the driver 36 to realize the first stop 34.
  • the driver 36 which can also be regarded as part of the seat support 4, is articulated, namely suitably mounted on the seat support so that it can pivot about a transverse axis 33, is connected to the seat support 4 in such a way that it always hangs vertically downwards in the direction of the base support 1.
  • This first stop 34 prevents a (further) movement of the plunger 37 and thus of the lower spring plate 32 downwards in the direction of the base support 1 and thus at the same time a movement of the driver 36 downwards.
  • the plunger 37 connected to the lower spring plate 32 protrudes upwards into the driver 36, the plunger 37 having a stop surface 38 pointing downwards in the direction of the base support 1, against which a stop surface 38 pointing upwards in the direction of the seat support 4 Stop surface 39 of driver 36 strikes.
  • stops 34, 35 strike one another.
  • the upper spring end 29, which is directed towards the seat support 4 and is acted upon by the upper end 29 of the spring 28 in the direction of the seat support 4 strikes the upper spring plate 31 or that (outer) spring receiving part 26 which includes this upper spring plate 31, forming a second stop 35 against a stationary, ie fixed and immovable part 41 of the base support 1, whereby a stationary second stop 35 is formed.
  • This second stop 35 prevents a (further) change in position of the upper spring end 29 in the direction of the seat support 4.
  • a tilting of the seat support 4 forwards is only possible if the lower spring end 30 is moved away from the base support 1 by moving it away from the on the seat support 4 attached driver 36 is taken.
  • the stop element 41 designed as part of the base support 1 or firmly connected to the base support 1 protrudes upward from the top of the base support 1 and has a stop surface 42 pointing downwards in the direction of the base support 1.
  • the at least one spring element 28 is pretensioned here.
  • the bias of the at least one spring element 28 is provided in such a way that, in the non-pivoted state of the seat support 4, both stops 34, 35 are effected simultaneously and a zero position (starting position) is defined as a result, see Fig. 3 , from which the seat support 4 can be pivoted or tilted. In order to leave this defined zero position, force must be applied against the spring 28. The user of the chair 100 therefore feels both taking in and leaving the Starting position, which is given by the construction described as a neutral rest position.
  • the seat support 4 When the seat support 4 is pivoted forwards, i.e. when the front edge 12 of the seat support 4 tilts about the pivot axis 8 downwards in the direction of the base support 1, the seat support 4 removes the lower spring plate 32 from the base support 1, the upper spring plate 31 and thus the second stop 35 of the spring receptacle 25 on the base support 1 serves as an abutment for the action of the spring element 28.
  • the seat support 4 pulls the plunger 37 with the lower spring plate 32 upwards against the force of the spring 28 via the driver 36 and thus the first stop 34.
  • the spring element 28 is acted upon and leaves the neutral position of equilibrium. As a result, the spring 28 is compressed against the upper spring plate 31, see Fig. 4 .
  • both stops 34, 35 are thus effected simultaneously, i.e. in addition to the stationary second stop 35 also the first stop 34, which is moved with its two stop surfaces 38, 39 in the direction of the seat support 4 and the lower spring plate 32 in this case takes away.
  • Push-button 44 can be designed as an integrated part of the seat support 4 or as a separate component connected to the seat support 4.
  • Both the pusher element 44 and the spring receiving part 26 have curved contact surfaces 54, 56 complementary to one another for the purpose of depressing, which are designed such that secure mechanical contact is ensured during the entire process of pivoting backwards.
  • a limitation of the tilting or tilting movement of the seat support 4 or the seat support / backrest support combination is also here preferably brought about by additional mechanical stops 23, 24 on the seat support 4 and / or the base support 1 (only in Fig. 3 drawn).
  • the spring rate 47 of the spring 28 or of the spring assembly is always the same, since the spring 28 is only ever subjected to pressure. Therefore, both when the seat support 4 is pivoted forwards and when the seat support 4 is pivoted backwards, the same pivoting resistance is always present and can be felt by the user of the chair 100, see Fig. 7 .
  • the size of the bias 48 can vary depending on the application.
  • Suitable spring elements 28 can also be used in this exemplary embodiment, as long as they define a suitable pivot resistance and are suitable for returning the seat support 4 from the pivoted position to the starting position.
  • Common to both embodiments is, inter alia, the always vertical arrangement of the spring 18, 28 between base support 1 and seat support 4, regardless of the inclination or pivot angle of seat support 4.
  • the longitudinal axis of the spring 18, 28 used is always perpendicular to the base support 1 or perpendicular to the horizontal.

Landscapes

  • Chairs Characterized By Structure (AREA)

Claims (4)

  1. Mécanisme basculant (10) pour un siège (100), comprenant
    - un support de base (1) qui présente un logement conique (2) par lequel il peut être placé sur une colonne de siège (3) du siège (100),
    - un support d'assise (4) qui est relié de manière pivotante au support de base (1) par un axe de pivotement (8) s'étendant transversalement à la direction longitudinale de siège (9),
    le support d'assise (4) pouvant pivoter à la fois vers l'arrière et vers l'avant, et
    - au moins un élément faisant ressort (18, 28) qui coopère d'une part avec le support d'assise (4) et d'autre part avec le support de base (1) pour ramener le support d'assise (4) d'une position de pivotement à la position de départ,
    ledit au moins un élément faisant ressort (18, 28) étant disposé exclusivement sur un côté de l'axe de pivotement (8), vu dans la direction longitudinale de siège (9),
    ledit au moins un élément faisant ressort (28) étant placé dans un logement de ressort (25) déplacé conjointement avec le support d'assise (4) et présentant plusieurs pièces (26, 27) mobiles les unes par rapport aux autres, au moins une partie (26) du logement de ressort (25) coopérant avec le support de base (1),
    caractérisé en ce qu'à la fois le mouvement des pièces de logement de ressort (26, 27) les unes par rapport aux autres et le mouvement du logement de ressort (25) par rapport au support de base (1) sont limités par des butées (34, 35).
  2. Mécanisme basculant (10) selon la revendication 1, dans lequel l'axe de pivotement (8) est disposé de manière décentrée, vu dans la direction longitudinale de siège (9).
  3. Mécanisme basculant (10) selon la revendication 2, dans lequel l'axe de pivotement (8) est disposé dans la partie avant du support de base (1), vu dans la direction longitudinale de siège (9).
  4. Siège (100), comprenant un mécanisme basculant (10) selon l'une quelconque des revendications 1 à 3.
EP18000638.9A 2017-08-05 2018-07-31 Mécanisme basculant Active EP3437520B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19000372.3A EP3590389A1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017117803.1A DE102017117803A1 (de) 2017-08-05 2017-08-05 Wippmechanik

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP19000372.3A Division EP3590389A1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant
EP19000372.3A Division-Into EP3590389A1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant

Publications (2)

Publication Number Publication Date
EP3437520A1 EP3437520A1 (fr) 2019-02-06
EP3437520B1 true EP3437520B1 (fr) 2021-01-27

Family

ID=63113313

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19000372.3A Pending EP3590389A1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant
EP18000638.9A Active EP3437520B1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19000372.3A Pending EP3590389A1 (fr) 2017-08-05 2018-07-31 Mécanisme basculant

Country Status (2)

Country Link
EP (2) EP3590389A1 (fr)
DE (1) DE102017117803A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022113759B3 (de) 2022-05-31 2023-10-05 Elsa Domaß Schwingstuhl

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125284B (en) * 1982-08-16 1985-08-07 Metalstand Co Adjustable chairs
DE3638273A1 (de) * 1986-10-13 1988-04-21 Thonet Geb Gmbh Sitzmoebel
NO160406C (no) * 1987-01-23 1989-04-19 Opsvik Peter As Vippemekanisme, fortrinnsvis for stolsete eller lignende.
AT386517B (de) * 1987-02-10 1988-09-12 Zuend & Co Ag K Stuhl, insbesondere arbeitsstuhl
DE4238276A1 (de) * 1992-11-13 1994-05-19 Oskar Winkler Gmbh & Co Kg For Sitzmöbel, insbesondere Schreibtischstuhl

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP3437520A1 (fr) 2019-02-06
EP3590389A1 (fr) 2020-01-08
DE102017117803A1 (de) 2019-02-07

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