EP3649893A1 - Reglage de la resistance au pivotement d'un composant d'un meuble - Google Patents

Reglage de la resistance au pivotement d'un composant d'un meuble Download PDF

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Publication number
EP3649893A1
EP3649893A1 EP19000496.0A EP19000496A EP3649893A1 EP 3649893 A1 EP3649893 A1 EP 3649893A1 EP 19000496 A EP19000496 A EP 19000496A EP 3649893 A1 EP3649893 A1 EP 3649893A1
Authority
EP
European Patent Office
Prior art keywords
support
spring
backrest
component
pivoting
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
EP19000496.0A
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German (de)
English (en)
Other versions
EP3649893B1 (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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Filing date
Publication date
Application filed by Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Publication of EP3649893A1 publication Critical patent/EP3649893A1/fr
Application granted granted Critical
Publication of EP3649893B1 publication Critical patent/EP3649893B1/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
    • A47C1/03266—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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs

Definitions

  • the invention relates to a device for adjusting the pivoting resistance of a pivotable component of a piece of seating furniture.
  • An object of the present invention is to achieve a particularly comfortable adjustment of the pivoting resistance of a seating component in a piece of seating.
  • the invention is implemented by a device for adjusting the pivoting resistance of a pivotable component of a piece of seating furniture, which seating furniture has a Spring mechanism with a spring element influencing the pivoting resistance of the pivotable component and, in addition to the pivotable component, two further components, at least one of these two further components being moved by pivoting the pivotable component, the spring element moving with its one spring end or with one with this spring end cooperating functional element is supported simultaneously on two of the three components.
  • one of these two components used for support is the component which is also moved or which is pivotable.
  • the invention is also implemented by a mechanism for a piece of seating furniture, in particular a synchronous mechanism for a correlated movement of the seat-backrest of a piece of seating furniture, in particular an office chair, with a base support that can be placed on a chair column, with a seat support and with a backrest support, the backrest support with the seat support is connected in such a way that a pivoting movement of the backrest support from a basic position into a pivoted position to the rear induces a movement of the seat support relative to the base support, a spring mechanism being provided, which spring mechanism is at least one of the Has pivoting resistance of the backrest influencing spring element, one end of which is operatively connected to at least one functional element, the at least one functional element being supported on a support device which has both a support element arranged on the seat support and a support element arranged on the base support, which is supports at least one functional element on both support elements simultaneously.
  • the invention is also implemented by a piece of seating, in particular an office chair, with a device or with a mechanism, as described above.
  • the invention uses the principle of the so-called "powerless adjustment" which is already known in principle in the field of chair mechanics. This means that the initial force for pivoting the pivotable component can be changed without changing the pretension of the spring element involved.
  • This principle is implemented according to the invention in a particularly elegant manner, namely preferably with the aid of an adjustable, in particular position and / or position-changing support element, which can be adjusted, in particular when the pivotable component is in a non-pivoted state, without the spring element being compressed (static aspect of the invention), this supporting element providing one of two contact surfaces on which the spring element, either directly or via a with the spring element cooperating functional element, supported at the same time.
  • At least one of these two contact surfaces moves by pivoting the pivotable component relative to the other contact surface in such a way that the two contact surfaces act simultaneously on the spring end or the functional element when pivoting the pivotable component in the manner of closing arms of a pair of scissors and thereby compress the spring element depending on the previously set position and / or position of the adjustable support element.
  • the nature of the pivoting movement of the component can be varied (dynamic aspect of the invention).
  • the pivoting behavior of the component can be influenced in a simple manner and individually set by the user according to his wishes.
  • the relationship between spring force and spring travel can be set for the pivoting of the pivotable component by the design of the support surfaces of the support elements. More precisely, such different pivoting behavior can be achieved as can be achieved by using spring elements with a linear, progressive or degressive spring characteristic, without however having to replace the spring element used for this purpose.
  • the figures show a synchronous mechanism 1 for a correlated seat-backrest movement of an office chair, with one on one Chair column 2 placeable base support 3, with a seat support 4 and with a backrest support 5, wherein the backrest support 5 is connected to the seat support 4 such that a pivoting movement of the backrest support 5, as indicated by arrow 6, from one to the Fig. 1 and 3rd shown non-pivoted basic position in one of the Fig. 2 and 4th shown, pivoted rearward position induces a movement of the seat support 4 relative to the base support 3.
  • This movement of the seat support 4 has at least one translational movement component, as seen in the longitudinal direction 8 of the chair.
  • the seat support 4 is carried along by the backrest support 5 during a swiveling movement to the rear, as indicated by arrow 7.
  • the seat support 4 in the present case with its rear end 9 seen in the longitudinal direction 8 of the chair, is pivotably connected to the backrest support 5 about a transverse axis 11.
  • the backrest support 5 is pivotally connected to the base support 3 about a further transverse axis 12 and the seat support 4, in the present case with its front end 13 seen in the longitudinal direction 8 of the chair, is connected to the base support 3 using a suitable connection, e.g. B. by means of a rotary / sliding joint 14. Connections are suitable which allow the desired relative movement of the seat support 4 to the base support 3 seen in the longitudinal direction 8 of the chair towards the rear.
  • connection between the mechanical components 3, 4, 5 can also be provided.
  • selected mechanical components for example the backrest support 5 and the base support 3 or the backrest support 5 and the seat support 4, can also be made in one piece and elastically connected to one another, as long as this allows the desired movements of the components with each other.
  • the mechanism 1 comprises a spring mechanism 15 which has at least one spring element 16 which influences the pivoting resistance of the backrest.
  • spring elements 16 two helical compression springs arranged between the seat support 4 and base support 3 inside the mechanism 1 are provided as spring elements 16, as in FIG Fig. 5 shown.
  • the mode of operation is explained below using one of these spring elements 16 as an example.
  • the entire mechanism 1 is constructed with mirror symmetry with respect to its central longitudinal plane, as far as the actual kinematics are concerned. In this respect, unless explicitly stated otherwise or shown in the figures, the following description is always based on construction elements of the actual swivel mechanism that are present in pairs on both sides.
  • the functional element 19 is clamped between the seat support 4 and the base support 3, that is, it is supported at the same time on the seat support 4 and the base support 3.
  • both a first support element 21 (upper support element) assigned to the seat support 4 and a second support element 22 (lower support element) assigned to the base support 3 are provided together form the support device.
  • Each support element 21, 22 has a support surface 23, 24.
  • the two support elements 21, 22 are preferably attached to their respective mechanical components 4, 3, i.e. either connected to them or designed as an integral part of them.
  • At least one of the support elements 21 is adjustable, namely, position and / or position changeable.
  • the purpose of this adjustability of the at least one support element 21 is to change a property of the movement of the spring end 18 of the spring element 21, which movement, in the present case, is directed rearward in the longitudinal direction 8 of the chair.
  • the purpose of the adjustability is in particular to adjust the extent of the change in position of the functional element 19 and thus the extent of the change in the pivoting resistance of the backrest when the backrest carrier 5 is pivoted into a pivoted position.
  • An adjustable support element 21 is preferably designed as a part of this mechanical component that is movable relative to the base body 25 of the corresponding mechanical component 4 or, as in the present example, as a separate component that is movably connected to this mechanical component 4.
  • the second support element 22 is a fixed, i.e. non-adjustable, integrated part of the base support 3 and thus designed to be stationary.
  • the support surface 24 of this second support element 22 has a defined surface configuration, so that there is a specific rolling path with a predetermined gradient.
  • the first support element 21 can be changed in position and position with the base body 25 of the seat support 4 connected so that the support surface 23 of the first support element 21 can have different angles to the support surface 24 of the second support element 22.
  • the support surface 23 of the first support element 21 also has a defined surface configuration, so that a specific rolling path with a predetermined gradient is obtained. The adjustability of the first support element 21 is discussed in more detail below.
  • the lower support element 22 can also be designed to be adjustable. This results in further possibilities for influencing the pivoting movement of the pivotable mechanical component 5, for example through the use of support surfaces 23, 24 with mutually coordinated gradient profiles.
  • the spring element 16 With its other end 26, seen in the longitudinal direction 8 of the chair, the spring element 16 is supported in a suitable manner on the base support 3.
  • a functional element 19 is attached to this end 18 of the spring element 16, which can act on the spring end 18 in the longitudinal direction 28 of the spring via a suitable coupling element 27, such as an eyelet or a hook.
  • the coupling element 27 strikes, for example, the end windings of the spring element 16 or is screwed into the spring element 16.
  • the functional element 19 comprises two bearings 31, 32, in particular nail bearings or ball bearings, which are movable independently of one another and are mounted on a common bearing axis 29.
  • the coupling element 27 connects the bearing axis 29 to the spring element 16, in the example illustrated here in that the eyelet or the hook of the coupling element 27 at least partially encompasses the bearing axis 29.
  • the bearings 31, 32 are arranged side by side on the bearing axis 29, only separated from one another by the coupling element 27.
  • the first bearing 31 of the functional element 19 is supported on the support surface 23 of the upper support element 21 and the second bearing 32 of the functional element 19 on the support surface 24 of the lower support element 22, or the bearings 31, 32 roll simultaneously on the support surfaces 23 , 24 from when the components move towards one another, in particular when the seat support 4 carried by the backrest support 5 moves relative to the fixed base support 3.
  • the upper support element 21 is adjustable, more precisely designed to change its position.
  • the adjustable support element 21 is preferably arranged on the seat support 3 in such a way that an adjustment (change in position and position) of the support element 21 does not cause any loading, in particular no change in position, of the functional element 19 interacting with the spring element 16.
  • the outside 34 of the support element 21 is at least partially convex and lies there in a corresponding manner concave-shaped receiving shell 35 on the underside of the base body 25 of the seat support 4.
  • the support element 21 When the support element 21 and its associated change in position and location relative to the seat support 4 are adjusted, the support element 21 is guided in the receiving shell 35.
  • the support element 21 slides in the receiving shell 35 and rotates about an axis of rotation 36 lying transversely to the longitudinal direction 8 of the chair.
  • the upper support element 21 is rotatable about its axis of rotation 36 in the seat support 4.
  • bearing pins 37 are provided on the two lateral ends of the upper support element 21, which lie in corresponding bearing bushes (not shown), which are located on both sides of the seat support 4 are attached to the base body 25.
  • the bearing axis 29 serving for the storage of the bearings 31, 32 of the functional element 19, however, is exposed, i.e. it is neither firmly connected to the seat support 4 nor to any other mechanical component, so that, placed between the support surfaces 23, 24 of the upper and lower support elements 21, 22, it can move when acted upon by them.
  • the spring mechanism 15 and the mechanical components 3, 4, 5 are coordinated with one another in such a way that the axis of rotation 36 of the upper support element 21 in the non-pivoted state, ie when the backrest is not pivoted, when the seat support 4 is also is still in its basic position, lies on the bearing axis 29 of the functional element 19.
  • the upper support element 21 is adjusted in this non-pivoted state, it is possible to roll the support surface 23 of the support element 21 around the lateral surface of the bearing 31 of the functional element 19 without the position of the bearing 31 changing.
  • a "powerless adjustment” is possible, that is, an adjustment of the upper support element 21 without changing the pretension of the spring element 16.
  • a manually adjustable adjustment device 17 is preferably provided for adjusting the at least one support element, here for pivoting the upper support element 21 about its axis of rotation 36.
  • the adjusting device 17 can also be designed to be driven by a motor.
  • a lever arm 38 arranged at a distance from the axis of rotation 36 is provided as an integrated driver on the upper support element 21.
  • the lever arm 38 is made in two parts.
  • the two lever arm halves 39 are oriented in the same direction, but spaced apart from one another, on the outer side 34 of the upper support element 21 opposite the double bearing 31, 32.
  • a movement thread (spindle drive) of the adjusting device 17 is positioned between the lever arm halves 39, with a threaded spindle 41 and with a threaded nut 42 movably guided on the threaded spindle 41, the threaded nut 42 engaging in the lever arm halves 39 with pins 43 attached to it laterally.
  • recesses 44 are provided in each lever arm half 39 and are elongated holes and extend in the longitudinal direction of the lever arm. These recesses 44 ensure one rotational decoupling and thus the additional degree of freedom required to adjust the upper support element 21 by the spindle drive.
  • the rotational movement of the threaded spindle 41 arranged in the longitudinal direction 8 of the chair is transmitted via the threaded nut 42 with the aid of the lever arm 38 to the upper support element 21, so that the support element 21 pivots about its axis of rotation 36.
  • the threaded spindle 41 is driven, for example, via a bevel gear or the like with the aid of a drive device (not shown in more detail) which, for example, can have a handwheel or the like as a handle.
  • the spindle drive is self-locking. In other words, the design of the threaded spindle 41 prevents the upper support element 21 from moving automatically.
  • All means for influencing the mode of action of the spring mechanism, in particular for adjusting the spring force, in particular the adjustable support element 21 and the adjusting device 17, are, as in the example here, preferably arranged exclusively in the seat support 4 or assigned to the seat support 4.
  • the base support 3, which only provides the second support surface can be made lighter and structurally simpler than in conventional mechanisms in which the spring force is adjusted in the base support or by means of components attached to the base support.
  • the functional element 19 By supporting the spring element 16 on the two support elements 21, 22, due to the relative movement of the seat support 4 to the base support 3 when the backrest support 5 is pivoted into a pivoted position, the functional element 19, as seen in the longitudinal direction 8 of the chair, moves backwards or backwards below. This causes an action on the at least one spring element 16 and thus a change in the pivoting resistance of the backrest.
  • the two bearings 31, 32 of the functional element 19 are clamped between the support surfaces 23, 24 of the upper and lower support elements 21, 22.
  • the support surface 23 of the upper support element 21 forms a first point of engagement on the outer ring of the first bearing 31, while a second point of attack on the outer ring of the second bearing 32 is defined by its contact with the support surface 24 of the lower support element 22.
  • the bearings 31, 32 and thus the entire functional element 19 are pressed forward by the upper support element 21, which moves backwards with the seat support 4, on the support surface 24 of the lower support element 22 (“scissor principle”).
  • the bearings 31, 32 and thus the points of attack of the bearings 31, 32 on the support surfaces 23, 24 are forced to move rearward in the longitudinal direction 8 of the chair.
  • the seat support 4 which is carried along by the backrest support 5 when the backrest support 5 is pivoted, moves downward to the rear.
  • the upper support element 21 is also carried or moved to the rear and acts on the spring element 16 via the functional element 19, so that the spring element 16 is compressed.
  • the user leaning against the backrest feels a swivel resistance.
  • Upper and lower support elements 21, 22, more precisely their support surfaces 23, 24, form the "arms" of a pair of scissors. While there would be no adjustment of the functional element 19 or spring stroke of the spring element 16 in a parallel position of these two support surfaces 23, 24 with a movement of the seat support 4 and thus the upper support element 21 to the rear, can be achieved by a targeted adjustment of the upper support element 21, preferably "without power”, achieve a defined angular position of the two support surfaces 23, 24 relative to one another (static aspect) and thus change the movement of the functional element 19 and thus the mode of operation of the spring element 16 (dynamic aspect).
  • the spring element 16 is only a little when the seat support 4 moves backwards compressed ( Fig. 2 ).
  • the functional element 19 performs only a small displacement, the spring stroke is small.
  • the path curve formed by the support surfaces 23, 24 can play a role on which the functional element 19 moves during a pivoting of the backrest.
  • the support surface 23 of the upper support element 21 is curved, in the present case both convex in sections and concave in sections.
  • the support surface 24 of the lower support element 22 is flat and runs obliquely, namely sloping from front to back as seen in the longitudinal direction 8 of the chair.
  • the design of the two support surfaces 23, 24, but in particular the design of the support surface 23 of the upper support element 21, results in a defined, non-linear trajectory of the functional element 19 when the backrest is pivoted to the rear. The pivoting resistance thus changes during the pivoting of the backrest.
  • the Support surfaces of the "sensed" sequence of mechanics are influenced by a user.
  • a slight progressiveness can be achieved in the swiveled state just before the backrest hits its maximum swivel.
  • the selected curvature of the support surface 23 results in a particularly pleasant movement characteristic of the mechanism 1.
  • the curved support surface 23 is designed in such a way that the effort felt by a user is always constant when the backrest is pivoted.
  • the degree of deflection of the functional element 19 and thus the degree of deflection of the front spring end 18, the spring stroke is influenced. It can thus be influenced whether the mechanism 1 behaves progressively, linearly or degressively.
  • the degree of deflection or the spring stroke is influenced by the closing angle of the scissor arms, more precisely by the angle of the support surfaces 23, 24 to one another.
  • Both a linear and a non-linear relationship can arise between the pivoting angle of the backrest support 5 on the one hand and the pivoting force required for this pivoting on the other hand.
  • This relationship is preferably linear, i.e. the effort required by the user to pivot the backrest is always the same regardless of the pivoting angle of the backrest.
  • the example described above uses a device for adjusting the pivoting resistance of a pivotable component of a piece of seating furniture.
  • the pivotable component is preferably the backrest support 5
  • Chair mechanism 1 of an office chair wherein the chair mechanism 1 is preferably a synchronous mechanism.
  • the seating furniture has a spring mechanism 15.
  • the spring mechanism 15 comprises a spring element 16 which influences the pivoting resistance of the pivotable component 5.
  • the seating furniture has two further components 3, 4. These two further components are preferably the base support 3 and the seat support 4 of the chair mechanism 1. At least one of these two further components, preferably the seat support 4, is adjusted by pivoting the pivotable component, here preferably by pivoting the backrest support 5 at the bottom, moved along.
  • the spring element 16 is supported with its one spring end 18 or with a functional element 19 cooperating with this spring end 18 simultaneously on two of the three components, namely preferably on the base support 3 and the seat support 4.
  • the rear end 26 of the spring element 16 is also supported on the backrest support 5.
  • One of these two components serving for support is the component which is also moved or which can be pivoted, that is to say preferably the seat support 4 or alternatively the backrest support 5.
  • This one component (which is moved or pivotable), preferably the seat carrier 4 or alternatively that Backrest support 5, and / or the other component serving for support, preferably thus the base support 3, is assigned a support element 21 for the purpose of supporting the spring end 18 or the functional element 19, its position and / or position for adjusting the pivoting resistance of the pivotable component 5 is changeable.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
EP19000496.0A 2018-11-06 2019-11-04 Réglage de la résistance au pivotement d'un composant d'un meuble Active EP3649893B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018127685.0A DE102018127685A1 (de) 2018-11-06 2018-11-06 Einstellen des Schwenkwiderstandes einer verschwenkbaren Komponente eines Sitzmöbels

Publications (2)

Publication Number Publication Date
EP3649893A1 true EP3649893A1 (fr) 2020-05-13
EP3649893B1 EP3649893B1 (fr) 2024-07-03

Family

ID=68468527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19000496.0A Active EP3649893B1 (fr) 2018-11-06 2019-11-04 Réglage de la résistance au pivotement d'un composant d'un meuble

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EP (1) EP3649893B1 (fr)
DE (1) DE102018127685A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220087425A1 (en) * 2020-09-18 2022-03-24 Dinkar Chellaram Synchronous-tilt reclining chair

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1358821A1 (fr) * 2002-04-30 2003-11-05 Klöber Gmbh & Co. Chaise avec un accumulateur d'energie dépendant du poids d'utilisateur
DE102015101546A1 (de) * 2015-02-03 2016-08-04 Bock 1 Gmbh & Co. Kg Synchronmechanik

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1358821A1 (fr) * 2002-04-30 2003-11-05 Klöber Gmbh & Co. Chaise avec un accumulateur d'energie dépendant du poids d'utilisateur
DE102015101546A1 (de) * 2015-02-03 2016-08-04 Bock 1 Gmbh & Co. Kg Synchronmechanik

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220087425A1 (en) * 2020-09-18 2022-03-24 Dinkar Chellaram Synchronous-tilt reclining chair
US11690455B2 (en) * 2020-09-18 2023-07-04 Dinkar Chellaram Synchronous-tilt reclining chair

Also Published As

Publication number Publication date
EP3649893B1 (fr) 2024-07-03
DE102018127685A1 (de) 2020-05-07

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