EP3345507B1 - Mécanisme pour une chaise - Google Patents

Mécanisme pour une chaise Download PDF

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Publication number
EP3345507B1
EP3345507B1 EP18000037.4A EP18000037A EP3345507B1 EP 3345507 B1 EP3345507 B1 EP 3345507B1 EP 18000037 A EP18000037 A EP 18000037A EP 3345507 B1 EP3345507 B1 EP 3345507B1
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EP
European Patent Office
Prior art keywords
support element
seat support
backrest
seat
chair
Prior art date
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Active
Application number
EP18000037.4A
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German (de)
English (en)
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EP3345507A1 (fr
Inventor
Hermann Bock
Martin Ballendat
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
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Bock 1 GmbH and Co KG
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Publication of EP3345507A1 publication Critical patent/EP3345507A1/fr
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    • 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
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • 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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests

Definitions

  • the invention relates to a mechanism for a chair, in particular for an office chair.
  • the invention relates to a chair with such a chair mechanism.
  • the term synchronous mechanism is understood to mean assemblies in the seat substructure of an office chair which ensure kinematics which are coupled to one another and bring about a certain relative movement of the seat and backrest with respect to one another.
  • the seat of the office chair which is usually provided with a padded seat, is mounted on the seat support.
  • the backrest support which extends backwards from the actual synchronous mechanism in a conventional manner, carries the backrest of the office chair on a cantilever arm.
  • Seat support and backrest support are usually articulated so that a pivoting movement of the backrest to the rear - as can be caused, for example, by leaning the chair user against the backrest - induces a lowering movement of the rear edge of the seat downward. This prevents the so-called "shirt pull-out effect" and increases seating comfort.
  • asynchronous mechanics means assemblies in which pivoting the backrest does not cause the seat support to move. In other words, when swiveling backwards, only that moves Backrest.
  • the seating comfort is reduced compared to synchronous mechanisms.
  • the so-called “shirt pull-out effect” can occur in asynchronous mechanisms due to the "divergence" of the movements of the backrest and seat.
  • such assemblies are significantly cheaper to manufacture than the synchronous mechanisms described above.
  • Rocker mechanisms are comparatively simple assemblies in the seat substructure of chairs, in which the backrest support is more or less rigidly connected to the seat support, the seat or the frame of the chair.
  • the resulting seat support-backrest support combination can be pivoted backward about a pivot axis running 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. Because of their comparatively simple structure, rocker mechanisms are usually significantly cheaper to manufacture than the mechanisms described above.
  • An object of the present invention is to improve the seating comfort of chair mechanisms.
  • the invention creates a chair mechanism with improved seating comfort.
  • a core idea of the invention is, as an alternative or in addition to the above-described swiveling movement to the front and to the rear, to enable individual or more mechanical components to be tilted to the right and left.
  • a two-part seat support is provided for this.
  • a two-part backrest support is additionally provided and the desired transverse movement of the seat support is transmitted to the backrest support by suitable means or vice versa.
  • Fig. 1 shows a mechanism 1 for an office chair in side view in the non-pivoted and not inclined state.
  • Fig. 2 shows mechanics 1 Fig. 1 in a cross section along the line II-II.
  • Fig. 3 shows mechanics 1 Fig. 2 with a laterally inclined seat support element.
  • the mechanism 1 has a base support 2, which is placed on the upper end of a chair column (not shown) by means of a cone receptacle 3.
  • the mechanism 1 comprises a seat support 4 which is arranged on the base support 2 and can be moved forwards and backwards in the longitudinal direction 8 of the chair relative to the fixed base support 2.
  • the seat (not shown) of the office chair which is usually provided with a padded seat, is mounted on the seat support 4.
  • the seat support 4 comprises a first seat support element 6 and a second seat support element 7, the second seat support element 7 relative to the first seat support element 6 transversely to the longitudinal direction 8 of the chair, i.e. to the right and left, is movable.
  • the first seat support element 6 is the seat support base which is attached separately from the actual seat, an element of the seat support 4 which interacts with the base support 2.
  • the second seat support element 7 is the seat mounting element, which either encompasses the seat with a seat surface or, for example, embodied as a mounting plate, offers the prerequisites necessary for seat mounting.
  • the mechanism 1 also includes a backrest support 5, the is connected to the seat support 4 and the base support 2. Connected to the backrest support 5 is the backrest (not shown) of the office chair, which is usually provided with a padded leaning surface.
  • the backrest support 5 comprises a first backrest support element 9 and a second backrest support element 11, the second backrest support element 11 being rotatable (tiltable) relative to the first backrest support element 8 about an axis of rotation 12 (tilt axis) lying in the longitudinal direction 8 of the chair.
  • the first backrest support element 9 is the backrest support base, an element of the backrest support 5 which interacts with the base support.
  • the second backrest support element 11 is the backrest mounting element, which either encompasses the backrest with the leaning surface or - for example as a mounting adapter - offers the conditions necessary for backrest mounting.
  • the backrest support 5 is pivotally connected both to the rear end 13 of the first seat support element 6, as seen in the longitudinal direction 8 of the chair, and to the rear end 14 of the base support 2 about rear axes of rotation 15, 16 extending transversely to the longitudinal direction 8 of the chair, the connection area of the backrest support 5 between them two axes of rotation 15, 16 serves as a rear coupling element 17 between base support 2 and seat support 4.
  • a front coupling element 18 is pivotally connected both to the front end 21 of the base support 2, as seen in the longitudinal direction 8 of the chair, and to the front end 19 of the first seat support element 6 about front axes of rotation 22, 23 extending transversely to the longitudinal direction 8 of the seat.
  • the backrest support 5 Due to the described connection of the backrest support 5 to the seat support 4, the backrest support 5 has to be pivoted backwards in the pivoting direction 24, ie from an upright starting position ( 1, 2 , 4th , 8th , 12th ) in a rear swivel position ( Fig. 5 , 9 , 13 ) of the mechanism 1, a movement of the entire seat support 4 relative to the fixed base support 2, the seat support 4 being lowered at the rear and raised at the front in the example described here.
  • the manner in which the pivotable backrest support 5 is coupled to the first seat support element 6 and / or the base support 2 is irrelevant to the present invention. It can be a direct or an indirect connection. The same applies to the articulation of the backrest support 5 to the base support 2 and the seat support 4 and thus the specific configuration of the synchronous movement between the backrest and the seat.
  • the mechanism 1 is with respect to the central longitudinal plane 25 (see Fig. 2 ), as far as the actual kinematics are concerned, mirror-symmetrical. In this respect, it is always to be assumed in this description that construction elements of mechanics 1 are present in pairs on both sides. In the Fig. 2 and 3rd parts of the mechanism 1, in particular parts of the base support 2, are not shown for reasons of clarity.
  • the terms “pivoting movement, pivoting, pivoting axis” etc. relate to the movement of the backrest support 5 and the seat support 4 about axes of rotation 15, 16, 22, 23 extending transversely to the longitudinal direction of the chair 8 when the backrest support 5 is pivoted.
  • the terms “tilting movement, incline””Tiltaxis” etc. refer to the movement of the second seat support element 7 or the second Backrest support element 11 about axes of rotation 12, 33, 34, 35, 36 extending in the longitudinal direction 8 of the chair, wherein the tilting movement can comprise a rotary and a translatory component.
  • tilting movement can comprise a rotary and a translatory component.
  • tilt refers to the rotary part of the tilt movement.
  • the longitudinal direction 8 of the chair extends from the front of the chair 26 in the direction of the rear 27 of the chair.
  • the two seat support elements 6, 7 are arranged one above the other, in particular such that the second seat support element 7 is arranged on the first seat support element 6 or is arranged above the first seat support element 6 or is carried by the first seat support element 6.
  • the transverse movement system according to the invention can be used with an existing chair mechanism without major structural adjustments.
  • a second seat support element 7 can be placed as an additional component on an existing mechanical component, the seat support of the conventional mechanism forming the first seat support component 6 of the mechanical system 1 according to the invention.
  • the first seat support element 6 can be designed as a mechanical component which is articulated to the base support 2 or the backrest support 5 via axes 22, 15 extending transversely to the longitudinal direction 8 of the chair.
  • the first seat support element 6 can also be designed as a seat slide that can be moved in the longitudinal direction 8 of the chair; in this case it can be suitable for seat depth adjustment, for example.
  • the second seat support element 7 can be moved relative to the first seat support element 6 on a path curve 28 which is shown in FIG a plane 29 lies transversely to the longitudinal direction 8 of the chair, this plane 29 preferably being a vertical plane (see Fig. 1 ) acts.
  • the plane 29 can also be at an angle to the vertical.
  • the seat carried by the second seat support element 7 inclines sideways in the longitudinal direction 8 of the chair.
  • the specific design of the seat is irrelevant to the invention.
  • the tilting movement of the second seat support element 7 preferably comprises a translation and a rotation.
  • a sideways movement that is to say a movement of the second seat support element 7 transversely to the longitudinal direction 8 of the chair, is combined with a tilting or tilting movement of the second seat support element 7 relative to the first seat support element 6.
  • the second seat support element 7 is connected to the first seat support element 6 via at least one link arrangement.
  • the handlebar arrangement comprises two links 31, 32 (coupling elements), one of which is provided on each side of the vertical central longitudinal plane 25 of the chair.
  • Each link 31, 32 is articulated both on a first axis of rotation 33, 35 on the first seat support element 6 and on a second axis of rotation 34, 36 on the second seat support element 7, with all axes of rotation 33, 34, 35, 36 parallel to one another lie and in Chair longitudinal direction 8 run.
  • all axes of rotation 33, 34, 35, 36 run below the seat surface of the seat.
  • connection of the two seat support elements 6, 7 to one another takes place with the formation of a four-bar mechanism, whereby for the second seat support element 7 there is a virtual pivot point 37 (instantaneous pole) as the intersection of the two straight lines running through the links 31, 32 (more precisely their articulation points). Due to the length of the links 31, 32 and / or the position of the articulation points or axes of rotation 33, 34, 35, 36 on the first and second seat support elements 6, 7, the distance between the instantaneous pole 37 and the seat support 4 can vary depending on the desired movement / inclination dynamics of the registered office.
  • the links 31, 32 are designed in the illustrated example as plate-shaped coupling elements, the pivot joints being provided for coupling to the first and second seat support elements 6, 7 on the lower and upper side edges of the links 31, 32, so that the axes of rotation 33, 43 , 35, 36 run parallel to the longitudinal direction of the links 31, 32.
  • the number of links 31, 32 on each side of the central longitudinal plane 25 can also be larger. Depending on the design, it is possible, for example, that two or three links are provided on each side instead of a single link 31, 32.
  • the instantaneous pole 37 is preferably located below the seat support 4, more precisely below the seat surface of the seat. At the in Fig. 18 illustrated variant, the instantaneous pole 37 is fixed as a real fulcrum in the seat support 4. There is no translation, only a tilting movement.
  • the instantaneous pole 37 of the seat support 4 changes during a movement of the second Seat support element 7 is always located so far from the seat support 4 transversely to the longitudinal direction 8 of the chair that the translation components of the movement are greater than the rotation components.
  • the instantaneous pole 37 is also preferably so far away from the seat support 4 that the translation component of the movement of the second seat support element 7 is greater than the rotation / inclination component of the movement.
  • the second seat support element 7 does not move on an extremely curved or steep, but instead on a rather flat path curve. This benefits increased seating comfort.
  • the instantaneous pole 37 is preferably located near the ground, that is to say in the vicinity of the chair carrier provided at the lower end of the chair column (not shown).
  • the instantaneous pole 37 moves as in FIGS Fig. 2 and 3rd illustrated, with an inclination of the seat support 4 when using the handlebar arrangement 31, 32 (four-joint mechanism) also on a trajectory 38 (see Fig. 3 ) and is not fixed. This is perceived as particularly pleasant for the movement dynamics. With a pure tilting movement, as in Fig. 18 shown, the instantaneous pole 37 is fixed.
  • the articulation points of the two links 31, 32 defined by the position of the axes 33, 34, 35, 36 form (with a view in the longitudinal direction of the chair 8) in the undeflected state a symmetrical, in particular isosceles trapezoid.
  • the two links 31, 32 more precisely the connecting lines 41, 42 between the upper and lower articulation points (axis positions), the trapezoidal legs, the connecting line 43 between the upper articulation points form the upper trapezoid base side and the connecting line 44 between the lower articulation points the lower trapezoidal base side .
  • the upper base side of the trapezoid is longer than the lower base side.
  • the distance between the lower axes, that is, the axes 33, 35 of the joints connecting the links 31, 32 to the first (lower) seat support element 6, is less than the distance between the upper axes, that is, the axes 34, 36 of the joints of the Connection of the handlebars 31, 32 with the second (upper) seat support element 7. For this reason, it is an unstable system that tends to tip over.
  • spring elements (not shown) are therefore provided, which - attacking at suitable points - hold the second seat support element 7 in position in the non-inclined basic state in relation to the first seat support element 6 and, in the inclined state, support or return the second seat support element 7 to its basic position . causes.
  • spring elements are provided, which are connected on the one hand to the first seat support element 6 and on the other hand to the second seat support element 7 or to the links 31, 32 in order to hold the second seat support element 7 in its basic position not inclined to the right or left.
  • the second seat support element 7 is connected to the first seat support element 6 in that the second seat support element 7 slides on a surface 45 of the first seat support element 6 which defines the movement path of the second seat support element 7 ( Fig. 16 ) or rolling ( Fig. 17 ) rests, directly or indirectly, for example via ball bearings 46 or the like.
  • the shape of the surface 45 defines the path of movement of the second Seat support element 7 transversely to the longitudinal direction of the chair 8. Even when using such a roller or slideway, a wandering instantaneous pole 37 can be achieved by designing the surface 45 of the roller or slideway.
  • a surface 45 of the first seat support element 6 convexly curved in the direction of the second seat support element 7 interacts with a surface 47 of the second seat support element 7 concavely curved in the direction of the first seat support element 6.
  • first and second seat support elements 6, 7 are two separate components which are mechanically connected to one another, e.g. about the coupling elements described (handlebars 31, 32).
  • at least one elastic coupling element (not shown) can be arranged as a third component between the first and second seat support elements 6, 7, for example in the form of a cuboid or cylindrical buffer element, which ensures the required mobility of the two seat support elements 6, 7 relative to one another.
  • the buffer element is constructed, for example, in such a way that a rubber-elastic material is arranged between a base plate and a cover plate.
  • Such or similar buffer elements can also be provided between the mutually movable mechanical components 6, 7, etc. as stop elements for limiting movement.
  • a one-piece design of the two seat support elements 6, 7 is also possible, preferably using a suitable, flexible or elastic connecting material which allows the second seat support element 7 to move and / or incline relative to the first seat support element 6.
  • a suitable, flexible or elastic connecting material which allows the second seat support element 7 to move and / or incline relative to the first seat support element 6.
  • Such a variant is can be produced particularly advantageously, for example using a multi-component injection molding process with various suitable plastics.
  • the mechanical components are preferably designed to be resilient, that is to say in particular designed to return the moved or deflected element to the basic position.
  • the otherwise necessary spring elements for erecting the second seat support element 7 or for maintaining the equilibrium state of the second seat support element 7 in the unoccupied state can then be omitted.
  • the movement of the second backrest support element 11 comprises only one rotation.
  • the central axis of rotation 12 (tilt axis) required for rotating the backrest support element 11 preferably runs below the seat surface of the seat.
  • the axis of rotation 12 of the backrest support 5 runs in the longitudinal direction 8 of the chair and parallel to the axes of rotation 33, 34, 35, 36 of the handlebar arrangement 31, 32, and thus perpendicular to the axes of rotation 15, 16, 22, 23 of base support 2, seat support 4 and backrest support 5.
  • the axis of rotation 12 is arranged in the vertical direction between the first axes of rotation 33, 35 of the links 31, 32 and the second axes of rotation 34, 36 of the links 31, 32.
  • the first and the second backrest support elements 9, 11 are preferably designed as two separate components which are mechanically connected to one another, for example via a butt joint with a rotational degree of freedom.
  • a one-piece design of the two backrest support elements 9, 11 is also possible, preferably using a suitable, flexible or elastic one Connection material that allows the second backrest support element 11 to be rotated about the axis of rotation 12.
  • the second backrest support element 11 is preferably designed as a central support arm, which extends centrally backwards away from the chair mechanism 1.
  • the second backrest support element 11 is designed as part of a frame 50 for the backrest, for example as a central connecting element between the backrest support 5 and a lower cross strut of the frame 50.
  • the second backrest support element 11 is coupled to the second seat support element 7 such that a movement of the second seat support element 7 relative to the first seat support element 6 a movement of the second backrest support element 11 relative to the first backrest support element 9, more precisely an inclination of the second backrest support element 11 to the right or left, effected (or vice versa).
  • the seat tilts to the right or left
  • the backrest A fixed backrest would be less comfortable with a reclining seat.
  • the lateral inclination of the seat or the backrest (without pivoting the seat support 4 backwards through the backrest support 5) is in the Fig. 3 , 6 , 10th , 14 shown.
  • the tilting movement of the backrest support 5, more precisely the tilting movement of the second backrest support element 11 and thus the backrest, is induced solely and exclusively by the articulation of the second backrest support element 11 to the second seat support element 7.
  • the second backrest support element 11 is connected to the second seat support element 7 in that a connecting arm 48 of the second backrest support element 11 engages with its free end 49 in a receiving opening 51 of the second seat support element 7 or lies in such a receiving opening 51.
  • the introduction of the force or the transmission of the torque from the second seat support element 7 to the second backrest support element 11 takes place exclusively via the connecting arm 48.
  • the connecting arm 48 is preferably not rotationally fixed, i.e. the free end 49 lies rotatably in the receiving opening 51.
  • the free end 49 is both axial, i.e. Can be moved in the longitudinal direction 8 of the chair and vertically in the receiving opening 51, so that the connecting arm 48 can move with limited degrees of freedom in accordance with the combined translation / rotation movement of the second seat support element 7 on the defined trajectory 28 relative to the first seat support element 6. that it causes a (pure) rotational movement of the second backrest support element 11 about its axis of rotation 12 relative to the first backrest support element 9.
  • This coupling is implemented, for example, by a sliding block 52 or the like attached to the free end 49 of the connecting arm 48, which is in the form of a groove in the setting or receiving opening 51 of the second seat support element 7 (lying there against the vertical side surfaces of the groove).
  • the movement of the link and thus the movement of the second seat support elements 7 is transmitted to the positively guided link block 52, the rotational degree of freedom being achieved by a suitable rotary connection of the link block 52 to the connecting arm 48.
  • the backrest support 5 is divided in such a way that the first backrest support element 9, like the front part of the backrest support 5 seen in the longitudinal direction 8 of the chair, realizes the connection of the backrest to the base support 2 and the first seat support element 6, while the second backrest support element 11, which extends in the longitudinal direction of the chair 8 seen to the rear connects to the first backrest support element 9, forms the transition to the backrest, but at the same time is coupled to the second seat support element 7.
  • connection or coupling of the second seat support element 7 to the second backrest support element 11 takes place via a number of links (not shown) articulatedly connected to the second seat support element 7 and the second backrest support element 11, which are preferably designed as the links between the two seat support elements 6, 7 in the manner of a four-bar mechanism, or via other coupling elements.
  • the connection or coupling of the second seat support element 7 to the second backrest support element 11 takes place via a one-piece design of the seat support element 7 and the backrest support element 11 using a suitable, flexible or elastic material.
  • a variant has proven to be particularly advantageous in which the inclination of the backrest or of the second backrest support element 11 is different from the inclination of the seat or of the second seat support element 7.
  • the invention it is therefore not only possible to exclusively implement a tilting movement of the second seat support element 7 to the right or left without this leading to a subsequent movement of the backrest support 5; for this purpose, only the coupling of the backrest support 5 to the second seat support element 7 has to be omitted.
  • the tilting movements of the elements involved can also differ from one another.
  • the inclination of the second backrest support element 11 and thus the backrest corresponds to the inclination of the second seat support element 7 and thus the seat.
  • the backrest preferably moves in a different ratio to the inclined seat, ie the two angles of inclination are not the same.
  • An uneven degree of inclination has turned out to be particularly user-friendly, in particular if an inclination of the second seat support element 7 by a certain inclination angle is followed by an inclination of the second backrest support element 11 by a larger inclination angle, as in FIGS Fig. 6 , 10th and 14 shown.
  • the position of the axis of rotation 12 of the backrest support 5 is preferably below the connection point of the free end 49 of the connection arm 48 with the seat support 4, that is to say below the point at which the sliding block 52 lies in the receiving opening 51. It is thereby achieved that the backrest tilts in the same direction as the seat. A counter-giving away of the backrest (pivoting in the opposite direction) can accordingly by a reverse order of these two points can be achieved.
  • the desired inclination ratio between seat and backrest can thus be set , in particular by the structural arrangement of the position of the axes 33, 34, 35, 36, by the defined setting of the distances between the axes 33, 34, 35, 36 to one another and / or by the arrangement of the real and virtual pivot points 37 of the components involved Chair mechanics 1.
  • a variant of the invention is particularly advantageous in which the backrest support 5, more precisely the first backrest support element 9, is coupled to the seat support 4, more precisely to the first seat support element 6, in such a way that pivoting of the backrest support 5 in the longitudinal direction 8 of the chair causes movement of the seat support 4 in the longitudinal direction 8 of the chair around a pivot axis running transversely to the longitudinal direction 8 of the chair relative to the base support 2 (“synchronous mechanism”).
  • synchronous mechanism instead of such a classic synchronous mechanism, the chair mechanism 1 which is provided with the invention can also be used to implement other mechanical types, such as asynchronous mechanisms, rocker mechanisms or mixed types.
  • the (tilting) movement of the second seat support element 7 relative to the first seat support element 6 is independent of any other movement of the seat support 4 in the longitudinal direction 8 of the chair, in particular independent of the (pivoting) movement of the seat support 4 caused by the backrest support 5 this constructive and functional independence of the movements by separating the seat support 4 into the two seat support elements 6, 7. Both movements are possible independently of one another, ie not coupled to one another, and also overlapping one another.
  • the entire seat support 4 is taken along when the backrest support 5 is pivoted backwards and a tilting movement of the second seat support element 7 to the right and left can be in the non-pivoted state of the mechanism 1 or in addition swivel the backrest.
  • the invention increases the number of degrees of freedom by providing additional degrees of freedom for the seat support 4 and optionally also for the backrest support 5. Compared to conventional solutions, there is an improved movement behavior of the chair on movements of the user.

Claims (10)

  1. Mécanisme (1) pour une chaise, en particulier pour une chaise de bureau,
    comprenant un support de base (2) pouvant être placé sur une colonne de chaise, avec un support de siège (4) disposé sur le support de base (2), pouvant être déplacé par rapport au support de base (2) dans la direction longitudinale de la chaise (8),
    et avec un support de dossier (5) connecté au support de siège (4),
    le support de siège (4) comprenant un premier élément de support de siège (6) et un deuxième élément de support de siège (7), le deuxième élément de support de siège (7) pouvant être déplacé par rapport au premier élément de support de siège (6) transversalement à la direction longitudinale de la chaise (8),
    ou
    le support de siège (4) comprenant un premier élément de support de siège (6) et un deuxième élément de support de siège (7), le deuxième élément de support de siège (7) pouvant être déplacé par rapport au premier élément de support de siège (6) transversalement à la direction longitudinale de la chaise (8), et le support de dossier (5) comprenant un premier élément de support de dossier (9) et un deuxième élément de support de dossier (11), le deuxième élément de support de dossier (11) pouvant tourner par rapport au premier élément de support de dossier (9) autour d'un axe de rotation (12) situé dans la direction longitudinale de la chaise (8),
    le déplacement du deuxième élément de support de siège (7) comprenant une translation et une rotation,
    caractérisé en ce que le deuxième élément de support de siège (7) est connecté au premier élément de support de siège (6) par le biais d'au moins un agencement de bras oscillant (31, 32), l'agencement de bras oscillant comprenant deux bras oscillants (31, 32), chaque bras oscillant (31, 32) étant articulé de manière à pouvoir tourner autour d'un premier axe de rotation (33, 35) au niveau du premier élément de support de siège (6) et de manière à pouvoir tourner autour d'un deuxième axe de rotation (34, 36) au niveau du deuxième élément de support de siège (7), tous les axes de rotation (33, 34, 35, 36) étant parallèles les uns aux autres et s'étendant dans la direction longitudinale de la chaise (8).
  2. Mécanisme (1) selon la revendication 1, dans lequel, dans le cas d'un déplacement du deuxième élément de support de siège (7) par rapport au premier élément de support de siège (6), le siège supporté par le deuxième élément de support de siège (7) s'incline latéralement, vu dans la direction longitudinale de la chaise (8).
  3. Mécanisme (1) selon la revendication 1 ou 2, dans lequel le centre instantané de rotation (37) du deuxième élément de support de siège (7), dans le cas d'un déplacement du deuxième élément de support de siège (7) transversalement à la direction longitudinale de la chaise (8), se trouve toujours éloigné du support de siège (4) dans une mesure telle que les proportions de translation du déplacement soient supérieures aux proportions de rotation.
  4. Mécanisme (1) selon l'une quelconque des revendications 1 à 3, dans lequel le deuxième élément de support de dossier (11) est accouplé au deuxième élément de support de siège (7) de telle sorte qu'un déplacement du deuxième élément de support de siège (7) par rapport au premier élément de support de siège (6) provoque un déplacement du deuxième élément de support de dossier (11) par rapport au premier élément de support de dossier (9).
  5. Mécanisme (1) selon l'une quelconque des revendications 1 à 4, dans lequel, dans le cas d'un déplacement du deuxième élément de support de siège (7) par rapport au premier élément de support de siège (6), le dossier supporté par le deuxième élément de support de dossier (11) s'incline latéralement, vu dans la direction longitudinale de la chaise (8).
  6. Mécanisme (1) selon l'une quelconque des revendications 1 à 5, dans lequel l'inclinaison du dossier est différente de l'inclinaison du siège.
  7. Mécanisme (1) selon l'une quelconque des revendications 1 à 6, dans lequel le deuxième élément de support de dossier (11) est connecté au deuxième élément de support de siège (7) par le fait qu'un bras de liaison (48) du deuxième élément de support de dossier (11) s'engage dans une ouverture de réception (51) du deuxième élément de support de siège (7).
  8. Mécanisme (1) selon l'une quelconque des revendications 1 à 7, dans lequel le support de dossier (5) est accouplé au support de siège (4) de telle sorte qu'un pivotement du support de dossier (5) provoque un déplacement du support de siège (4) dans la direction longitudinale de la chaise (8) par rapport au support de base (2).
  9. Mécanisme (1) selon la revendication 8, dans lequel le déplacement du deuxième élément de support de siège (7) par rapport au premier élément de support de siège (6) est indépendant du déplacement du support de siège (4) provoqué par le support de dossier (5).
  10. Chaise, en particulier chaise de bureau, comprenant un mécanisme (1) selon l'une quelconque des revendications 1 à 9.
EP18000037.4A 2017-01-04 2018-01-04 Mécanisme pour une chaise Active EP3345507B1 (fr)

Applications Claiming Priority (2)

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DE102017100117 2017-01-04
DE202017102909.3U DE202017102909U1 (de) 2017-01-04 2017-05-15 Stuhl mit einteiliger Sitzschale

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EP3420853A4 (fr) * 2016-02-23 2019-10-16 Kokuyo Co., Ltd. Mécanisme de support de siège et chaise
US10702066B2 (en) * 2018-11-19 2020-07-07 Profim SP. ZO.O Office chair
DE102020124975A1 (de) 2020-09-24 2022-03-24 Bock 1 Gmbh & Co. Kg Mechanik für einen Stuhl

Citations (1)

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DE10106791A1 (de) * 2001-02-12 2002-08-14 Sdm Hansen Gmbh St Margrethen Sitzmöbel

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CH666171A5 (de) * 1984-10-03 1988-07-15 Giroflex Entwicklungs Ag Stuhl mit rueckwaerts neigbarem sitz- und rueckenlehnentraeger.
US5538326A (en) * 1994-11-14 1996-07-23 Milsco Manufacturing Company Flexible unitary seat shell
EP1191863A4 (fr) * 1999-06-17 2004-06-09 Steelcase Inc Construction de fauteuil
ITMI20022194A1 (it) * 2002-10-16 2004-04-17 Icf Spa Sedia avente sedile e schienale mobili.
CA2646948A1 (fr) * 2006-03-24 2007-10-04 Herman Miller Inc. Meuble
DE102008011309B3 (de) * 2008-02-27 2009-06-04 Thonet Gmbh Bürostuhl
NO328092B1 (no) * 2008-03-10 2009-12-07 Efg Europ Furniture Group Ab Ryggestotteanordning
AT12867U1 (de) * 2011-05-04 2013-01-15 Eckhard Dipl Ing Hansen Sitzmöbel
DE202012002288U1 (de) * 2012-03-08 2012-05-11 Walter Knoll Ag & Co. Kg Funktionsstuhl
DE102012107778B4 (de) 2012-08-23 2018-08-16 Haworth Gmbh Stuhl, insbesondere Bürostuhl
EP2910147B1 (fr) * 2012-10-18 2018-11-07 Okamura Corporation Chaise
DE102014103780B3 (de) * 2014-03-19 2015-06-18 Wilkhahn Wilkening + Hahne Gmbh + Co. Stuhl
DE202014101592U1 (de) * 2014-04-04 2014-06-30 Wilkhahn Wilkening + Hahne Gmbh + Co. Stuhl
DE102014119612A1 (de) * 2014-12-23 2016-06-23 Recaro Aircraft Seating Gmbh & Co. Kg Sitzvorrichtung mit längsgeteilter Sitzbodeneinheit

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DE10106791A1 (de) * 2001-02-12 2002-08-14 Sdm Hansen Gmbh St Margrethen Sitzmöbel

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US10499742B2 (en) 2019-12-10
EP3345508A1 (fr) 2018-07-11
EP3345508B1 (fr) 2020-06-17
DE202017102909U1 (de) 2018-04-05
US20180184809A1 (en) 2018-07-05

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