EP3387957B1 - Mécanique synchrone pour un siège de bureau - Google Patents

Mécanique synchrone pour un siège de bureau Download PDF

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Publication number
EP3387957B1
EP3387957B1 EP18000336.0A EP18000336A EP3387957B1 EP 3387957 B1 EP3387957 B1 EP 3387957B1 EP 18000336 A EP18000336 A EP 18000336A EP 3387957 B1 EP3387957 B1 EP 3387957B1
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EP
European Patent Office
Prior art keywords
support
backrest
seat support
seat
guide element
Prior art date
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Active
Application number
EP18000336.0A
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German (de)
English (en)
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EP3387957A1 (fr
Inventor
Hermann Bock
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Bock 1 GmbH and Co KG
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Bock 1 GmbH and Co KG
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Publication of EP3387957A1 publication Critical patent/EP3387957A1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the invention relates to a mechanism for an office chair, with a base support that can be placed on a chair column, with a seat support arranged on the base support and movable relative to the base support, and with a backrest coupled to the seat support, pivoting the backrest relative to movement of the seat support the base carrier.
  • a kinematics is provided which brings about a certain relative movement of the seat and backrest with one another, so that there is a correlated movement of the seat backrest (“synchronous mechanism”) ,
  • 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 supports and backrest supports are usually articulated in such a way that a pivoting movement of the backrest to the rear, as can be caused, for example, by the chair user leaning against the backrest, induces a lowering movement of the rear edge of the seat downward.
  • a chair mechanism in which a lifting movement of the rear edge of the Seat can be induced upwards is in US2015 / 0296988 A1 described.
  • An object of the present invention is to achieve a more advantageous movement characteristic of the mechanics and thus of the office chair.
  • the synchronous mechanism according to the invention for a correlated seat-backrest movement of an office chair comprises a base support which can be placed on a chair column, a seat support arranged on the base support and movable relative to the base support, and a backrest support connected to the seat support, pivoting the backrest support causing a movement of the backrest support Seat carrier caused relative to the base carrier.
  • the backrest support which can be pivoted about a transverse axis, in particular by means of this transverse axis, is connected directly to the base support in an articulated manner and is thus pivotably mounted on the base support.
  • the backrest support is not directly and directly connected to the seat support, but via a coupling element, preferably provided in the region of the front end of the backrest support, the coupling element being articulated both to the backrest support and to the seat support, in particular in each case with the formation of a swivel joint is, wherein the force introduced into the seat support when the backrest support is pivoted is introduced into the seat support exclusively via the coupling element.
  • a first guide element is provided on the base support and a second guide element is provided on the seat support, the first guide element and the second guide element interacting to form a pair of guide elements in such a way that pivoting of the backrest support moves the second guide element moved together with the seat support along the together with the base support fixed first guide element and thus moving the seat support relative to the base support.
  • Such a construction of the mechanics makes it possible to vary the correlated movement of the seat and backrest relative to one another with particularly simple constructive means.
  • the synchronous course of the seat and backrest can be changed, for example, by simply changing the course of the second guide element.
  • only the position angle of a guide slot in the seat support has to be changed in order to obtain a different movement characteristic.
  • two pairs of guide elements spaced apart from one another in the longitudinal direction of the chair are provided, namely a pair of front guide elements as seen in the longitudinal direction of the chair and a pair of rear guide elements as seen in the longitudinal direction of the chair.
  • the base support is preferably connected to a front area of the seat support by the front pair of guide elements and preferably to a rear area of the seat support by the rear pair of guide elements. This also enables a separate movement curve of the front area of the seat support and the rear area of the seat support.
  • a pair of guide elements is understood to mean the respectively interacting pairing of sliding element and sliding track or rolling element and rolling track.
  • connection point of the coupling element to the seat support which serves as the location of the force introduction into the seat support when the backrest support is pivoted, wherein this is designed in particular as a swivel joint, is not identical to the connection point of the seat support serving as the place for guiding the seat support on the base support Base support, here formed by the second Guide element.
  • the two locations fall apart, that is to say the location of the introduction of force from the backrest support into the seat support is arranged or spaced apart from the location of the guidance of the seat support on the base support.
  • the synchronous movement desired in this mechanism can be achieved, in which the pivoting of the backrest support induces a movement sequence of the seat support in which, with the help of the coupling element , a non-constant, but constantly changing gear ratio between the two components of the backrest support and seat support.
  • This is crucial for the self-adjusting effect of the chair mechanics and is advantageous for the kinematics felt by the user of the chair. With the invention, a more advantageous movement characteristic of the mechanics and thus of the office chair is achieved.
  • the coupling element provides an additional degree of freedom for the coupling of the backrest support to the seat support, which is required in order to enable the backrest support and seat support to move relative to one another at all. Without the coupling element, the desired relative movement of the seat support and backrest support would not be possible, since the two components would lock against each other due to their respectively predetermined movement paths relative to the base support.
  • the coupling element can be used to accomplish a special, advantageously synchronous movement sequence of the backrest support and seat support, which results in a desired variable transmission ratio.
  • the first guide element comprises a sliding or rolling element and the second guide element comprises a sliding or rolling path along which the sliding or rolling element moves.
  • the sliding or rolling element can be rigid or rotatable about an axis of rotation lying transversely to the longitudinal direction of the chair.
  • the slideway or taxiway can have any path curve, the choice of which allows the movement characteristics of the mechanics to be changed.
  • the second guide element comprises a sliding or rolling element and the first guiding element comprises a sliding or rolling path along which the sliding or rolling element moves.
  • the slide or taxiway is formed by a guide slot contained in a component of the mechanics.
  • the guide slot is preferably located in the seat support, in the case of kinematic reversal in the base support.
  • the guide slot preferably has opposing sliding or rolling surfaces in such a way that the sliding or rolling element, when executing a relative movement of the seat support and base support, is guided simultaneously in the slot against two contact surfaces.
  • the guide elements which connect the seat support to the base support, form a linear guide
  • the use of the coupling element does not result in a linear, but a desired, non-linear synchronous movement of the seat with the backrest.
  • other guideways are also possible. Due to the design of the guides, in particular their position, for example the choice of a suitable angle of inclination of the guide to the vertical, the synchronous movement of the seat support can be individually adapted in the simplest way.
  • the location of the force application seen in the longitudinal direction of the chair, always, i. H. in all swivel positions of the backrest support, located behind the front pair of guide elements. Furthermore, it has proven to be particularly advantageous that the location of the application of force is always between the front pair of guide elements and the rear pair of guide elements.
  • the coupling element is particularly important for the synchronous mechanism according to the invention.
  • An embodiment of the invention has proven to be particularly advantageous for the intended movement sequences of the components of the mechanical system, in which the position of the connection point of the coupling element with the seat support, in other words the location of the application of force, relative to the location of the connection point of the coupling element the backrest support changed depending on the angular position of the backrest support. In other words, the position of the body longitudinal axis of the coupling element defined by these two connection points is changed by the pivoting movement of the backrest support.
  • the coupling element moves from the initial position in which the longitudinal axis of the body of the coupling element points obliquely backwards (in particular from front bottom to back top) while the backrest support pivots from the non-pivoted position into the position pivoted backwards as far as possible , across the vertical into an end position in which the longitudinal axis of the body of the coupling element points obliquely to the front (in particular from the back down to the front up).
  • the position of the body longitudinal axis of the coupling element which changes when the backrest support swivels, deviates from the movement curve of the seat support defined by the interaction of the two guide elements, essentially during the entire pivoting movement of the backrest support.
  • the longitudinal axis of the body of the coupling element does not run on or parallel to the movement curve of the seat support relative to the base support.
  • pivoting the backrest support rearward causes the seat support to be raised in accordance with the movement curve defined by the interaction of the two guide elements.
  • pivoting the backrest support rearward induces an immediate lifting movement of the rear area of the seat support and at the same time an immediate lifting movement of the front area of the seat support.
  • the user of the office chair lifts himself upward by loading the backrest.
  • Complex mechanical constructions for achieving the desired movement of the seat support are therefore not necessary.
  • the desired movement path is realized by simple constructive means, namely an articulation of the backrest support to the seat support via a coupling and a number of guided connections between the seat support and base support.
  • the seat support is not only raised in its rear area, but also that the front area of the seat support is raised at the same time, the seat is synchronously carried along in a defined relationship to the backrest upwards. Since the user sitting on the seat surface performs a movement which follows the movement of the backrest when the backrest is pivoted into a rear position, the so-called "shirt pull-out effect" is particularly effectively prevented.
  • the synchronous mechanism 1 has a base support 2, which can be placed on the upper end of a chair column (not shown) by means of a cone receptacle 3.
  • the synchronous mechanism 1 comprises an essentially frame-shaped seat support 4 and a backrest support 5 which is fork-shaped in plan view, the cheeks 6 of which are arranged on both sides of the base support 2.
  • Fig. 1 the basic position is shown, in which the backrest support 5 assumes an essentially vertical position.
  • a seat (not shown) with a padded seat is mounted on the seat support 4.
  • the assembly is carried out with the help of fasteners, not shown, in the usual way.
  • the seat is firmly mounted on the seat support 4, so that a movement of the seat support 4 also has a corresponding movement of the seat.
  • a backrest (not shown) is attached to the backrest support 5 and is height-adjustable in modern office chairs.
  • the backrest can also be connected in one piece to the backrest support 5.
  • the entire synchronous 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, the following description is always based on construction elements of the actual mechanics that are present on both sides in pairs.
  • Front or “front” means that a component is arranged in the longitudinal direction 7 of the chair at the front or refers to a component that extends in the direction of the front seat edge 8 or points in this direction
  • rear or “rear” means that a component is arranged in the longitudinal direction 7 of the chair at the rear or refers to a component extending in the direction of the backrest or the backrest support 5 or the rear seat edge 9 or pointing in this direction.
  • the information “above” or “below” refers to the intended use of the office chair or the mechanism 1.
  • the backrest support 5 is mounted on a pivot bearing 11 on the base support 2 such that the backrest support 5 directly and directly on the base support 2 via the pivot bearing 11 is articulated.
  • the backrest support 5 with the backrest can be pivoted backwards and downwards in the pivoting direction 13 about the pivot axis 12 which runs through the pivot bearing 11 and is transverse to the longitudinal direction 7 of the chair.
  • the pivot bearing 11 is formed in front of the front end 14 of the cheek 6 of the backrest support 5 which extends forward, more precisely at the rear end 15 of the base support 2.
  • Two pairs of guide elements 16, 17 spaced apart from one another in the longitudinal direction 7 of the chair are provided, namely a pair of front guide elements 16 seen in the longitudinal direction 7 of the chair, by which the base support 2 is connected to a front region 18 of the seat support 4, and a rear pair of guide elements 17, seen in the longitudinal direction of the chair 7. through which the base support 2 is connected to a rear region 19 of the seat support 4.
  • Each pair of guide elements 16, 17 is formed by a first guide element 21, 23 and a second guide element 22, 24 cooperating therewith.
  • a front first guide element 21 is provided on the base support 2 and a front second guide element 22 is provided on the seat support 4, the front first guide element 21 and the front second guide element 22 cooperating to form the front pair of guide elements 16.
  • a rear first guide element 23 is provided on the base carrier 2 and a rear second guide element 24 is provided on the seat carrier 4, the rear first guide element 23 and the rear second guide element 24 interacting to form the rear pair of guide elements 17.
  • the two pairs of guide elements 16, 17 work together in such a way that pivoting the backrest support 5 moves the second guide elements 22, 24 moved together with the seat support 4 along the first guide elements 21, 23 fixed on the base support 2 and thus causing the seat support 4 to move relative to the base support 2.
  • the first guide elements 21, 23 each comprise a slide element and the second guide elements 22, 24 each comprise a slide path along which the corresponding slide element moves.
  • rolling elements can also be provided, which can be moved along taxiways.
  • the slideways 22, 24 are formed by guide slots which are contained in the seat support 4. More precisely, the guide slots 22, 24 are provided in side walls 25 of the seat support 4, which extend laterally from the upper side 26 of the seat support, essentially parallel to the outer sides of the base support 2, vertically downward in the direction of the base support 2. Each guide slot 22, 24 has opposing sliding surfaces 27, so that the respective sliding element 21, 23 is guided in the slot 22, 24 adjacent to two contact surfaces 27, 28 when carrying out a relative movement of the seat support 4 and base support 2.
  • the slideways 22, 24 are designed as linear guides and are inclined to the horizontal 29 (symbolized in the figures by the lower end of the cone receptacle 3).
  • the inclinations of the slideways or guide slots 22, 24 determine the direction of movement 31 of the seat support 4 when the backrest support 5 is pivoted.
  • the slideways 22, 24 do not necessarily run parallel to one another. In the illustrated example, they have different inclinations.
  • the sliding elements 21, 23 can be designed, for example, in the form of sliding blocks or bolts.
  • the sliding elements 21, 23 which are in contact with the guideways 22, 24 and, more precisely, lie in the guide slots are stationary, but possibly rotatable about axes of rotation 32 lying transversely to the longitudinal direction 7 of the chair, arranged on the base support 2, more precisely firmly connected to the base support 2.
  • the lifting force is introduced into the seat support 4 by the backrest support 5, more precisely, its pivoting to the rear.
  • the front end 14 of the backrest support 5 is not directly connected to the seat support 4, more precisely to an arm 35 projecting downwards from the top 26 of the seat support 4 in the direction of the base support 2.
  • an articulated coupling element 36 is provided on the front end 14 of the backrest support 5, which is articulated on the one hand to the backrest support 5 and on the other hand articulated to the seat support 4, namely to the free end 37 of the arm 35.
  • the connecting line of the two pivot axes 38, 39 formed by these articulated connections and lying transversely to the longitudinal direction 7 of the chair forms the longitudinal axis 41 of the coupling element 36.
  • the backrest support 5 is connected to the front end 14 of the cheek 6 with the seat support 4 via a coupling element 36, wherein the coupling element 36 is articulated both with the backrest support 5 and with the seat support 4, in particular in each case with the formation of a swivel joint 42, 43, which when the backrest support 5 is pivoted into the seat support 4 introduced force is introduced via the first swivel joint 42 into the coupling element 36 and from there via the second swivel joint 43 connecting the coupling element 36 to the seat support 4 into the seat support 4.
  • the coupling element 36 extends from the arm 35 provided on the right-hand side of the seat support 4 to the arm provided on the left-hand side of the seat support 4 (not shown, on both sides of the central longitudinal plane of the mechanism 1, and is therefore, unlike most others, Components of the mechanics described here, not in pairs, but only available once.
  • connection of the coupling element 36 to the backrest support 5 can be provided as a simple, arbitrarily designed swivel joint 42.
  • the connection of the coupling element 36 to the seat support 4 is preferably carried out in such a way that the coupling element 36 has an opening 44 in which an axis 45 rigidly connected to the seat support 4 is mounted, that is to say the coupling element 36 is rotatably mounted on the axis 45.
  • the pivot axis 39 thus formed forms the actual connection point of the coupling element 36 and the seat support 4 and thus the location 34 of the force application, i. H. at this one point the coupling 36 is connected to the seat support 4 to form a swivel joint 43.
  • this is the only connection of the backrest support 5 to the seat support 4.
  • the backrest support 5 is also connected to the base support 2 only via a single point, namely via the main pivot axis 12 of the mechanism 1.
  • the seat support 4 When the backrest support 5 is pivoted backwards, the seat support 4 is pulled backwards by the backrest support 5 via the described articulated coupling, which results in a lifting movement of the seat support 4 due to the forced guidance.
  • the leading backwards The path of movement 31 of the seat support 4 results from the inclination of the guide slots 22, 24 in the seat support 4, in which the sliding elements 21, 23 of the fixed base support 2 lie.
  • the seat support 4 with the slots 22, 24 is moved relative to the fixed base support 2 with its sliding elements 21, 23.
  • connection point 43 of the coupling element 36 to the seat support 4, in particular designed as a swivel joint, which serves as the location 34 of the force introduction into the seat support 4 when the backrest support 5 is pivoted, is thus not identical to that as the location 33 for guiding the seat support 4 on the base support 2 serving connecting point of the seat support 4 with the base support 2, here formed by the guide element pairs 16, 17.
  • the two locations 33, 34 fall apart, ie the location 34 of the introduction of force from the backrest support 5 into the seat support 4 is located at a distance from the location 33 of the guidance of the seat support 4 on the base support 2.
  • the front swivel joint 43 of the coupling 36 which is furthest away from the main pivot axis 12 of the mechanism 1, directly engages with the seat support 4 and lifts it up, while the trajectory 31 of the seat support 4 traversed thereby at a location 33 remote from this location 34 of the force application is realized in that guide slots 22, 24 provided on the seat support 4 move relative to slide elements 21, 23 provided on the base support 2.
  • the location 34 of the force introduction is in no case on one of the two guideways 21, 23.
  • the location 34 of the force introduction into the seat support 4 is, seen in the longitudinal direction 7 of the chair, always, ie in all Pivotal positions of the backrest support 5, behind the front pair of guide elements 16.
  • the location 34 of the application of force is always between the front guide path 21 and the rear guide path 23 or between the front pair of guide elements 16 and the rear pair of guide elements 17.
  • the exact connection location 43 of the backrest carrier 5 and the seat support 4, also seen in the longitudinal direction 7 of the chair, is always in front of the cone seat 3.
  • pivot axis 12 of the connection of the backrest support 5 to the base support 2 is seen in the longitudinal direction 7 of the chair behind the pivot axis 39 of the connection of the coupling 36 of the backrest support 5 to the seat support 4 arranged.
  • both pivot axes 38, 39 of the connection of the backrest support 5 to the seat support 4 are located above the position of the pivot axis 12 of the connection of the backrest support 5 to the base support 2 by means of the coupling 36.
  • the location 34 of the application of force changes relative to the location of the connection point 42 of the coupling element 36 with the backrest support 5 as a function of the angular position of the backrest support 5.
  • the position of the body longitudinal axis 41 of the coupling element 36 defined by the two connection points 42, 43 is determined by the pivoting movement of the backrest support 5 changed.
  • the seat support 4 By pivoting the backrest support 5 downward to the rear, the seat support 4 is carried in the pivoting direction 13 and raised due to the guide means 21, 22, 23, 24.
  • the coupling element 36 moves while the backrest support 5 pivots from the non-pivoted position into the maximum pivoted position backwards, from a starting position in which the body longitudinal axis 41 of the coupling element 36 slants backwards (namely in particular from the front down to the back up) points over the vertical 46 extending through the pivot axis 39 into an end position in which the body longitudinal axis 41 of the coupling element 36 points obliquely to the front (namely from the bottom down to the front up).
  • the position of the longitudinal body axis 41 of the coupling element 36 which changes when the backrest support 5 is pivoted, deviates from the movement curve of the seat support 4 defined by the guide element pairs 16, 17, essentially during the entire pivoting movement of the backrest support 5.
  • the body longitudinal axis 41 runs of the coupling element 36 not on or parallel to the movement curve of the seat support 4 relative to the base support 2.
  • Swiveling the backrest support 5 backwards causes the seat support 4 to be raised in accordance with the movement curve defined by the interaction of the pairs of guide elements 16, 17. Swiveling the backrest support 5 backwards induces an immediate lifting movement of the rear area 19 of the seat support 4 and at the same time an immediate lifting movement of the front area 18 of the seat support 4.
  • the seat carrier 4 Due to the arrangement of the guideways 22, 24, not only the rear region 19 of the seat carrier 4 performs a lifting movement when the backrest is loaded and the backrest carrier 5 performs a pivoting movement in the pivoting direction 13 towards the bottom.
  • the front area 18 of the seat support 4 is raised linearly in a synchronous manner. In other words, there is a simultaneous lifting movement of the front and rear ends of the seat. The seat as a whole is raised. At the same time, the lifting movement of the front area 18 of the seat support 4 takes place stronger than the lifting movement of the rear region 19 of the seat carrier. The seat is thus raised more at the front than at the rear. In other words, when the backrest support 5 is pivoted, the seat support 4 also performs a tilting movement to the rear.
  • the seat support 4 moves backwards in the pivoting direction 13 with the backrest support 5 coupled to the seat support 4. At the same time, the seat support 4 is raised. The movement of the seat support 4 in the longitudinal direction 7 of the seat is superimposed by a tilting or swiveling movement of the seat support 4 (to the rear).
  • the front guideway 22 runs in the starting position of the backrest support 5, which is not pivoted backwards, in the example illustrated here at an angle of approximately 45 degrees to the horizontal 29 from the front down to the back up, seen in the longitudinal direction 7 of the chair, that is to say rising towards the rear. Angles of inclination 47 of the front guideway 22 to the horizontal 29 between 40 and 50 degrees have proven to be particularly advantageous.
  • the rear guideway 24 with the horizontal 29 encloses an angle which is approximately 20 to 25 percent smaller than the front guideway 22.
  • the rear guideway 24 extends at an angle of approximately 35 degrees to the horizontal 29, otherwise the same as the front guideway 22, so rising to the rear. Tilt angles 48 of the rear guideway 24 between 30 and 40 degrees have proven to be particularly advantageous.
  • the coupling element 36 lies in the example illustrated here, otherwise aligned as well as the first and second guideways 22, 24, about 25 degrees to the horizontal 29.
  • Fig. 2 the partially pivoted state is shown, in which the body longitudinal axis 41 of the coupling element 36 is in a precisely tangential position to the circular path, which results from the pivoting of the backrest support 5 downward about the main pivot axis 12.
  • the movement vectors of the pivot axes 38, 39 are directed in the same way, so that the force introduced by the backrest support 5 via the pivot axis 38 into the coupling element 36 is transmitted without loss via the pivot axis 39 from the coupling element 36 into the seat carrier 4.
  • the seat support 4 experiences the maximum power transmission and thus speed.
  • the maximum pivoted backward position of the backrest support 5 the longitudinal axis 41 of the coupling element 36 with the horizontal 29 includes an angle of approximately 100 degrees.
  • the coupling element 36 is thus inclined or pivoted forward over the vertical 46, the vertical position of the coupling element 36.
  • the connection point 42 between the coupling element 36 and the backrest support 5 is thus, seen in the longitudinal direction 7 of the chair, in front of the force introduction point 34, the connection point 43 of the coupling element 36 with the seat support 4.
  • a number of suitable spring elements can be provided between the base support 2 and the seat support 4, attached to suitable articulation points, which serve to bring the seat support 4 back from the pivoted position back to the starting position or support such a return.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (8)

  1. Mécanisme synchrone (1) destiné à un mouvement dossier-siège corrélé d'une chaise de bureau, le mécanisme synchrone comprenant
    un support de base (2) pouvant être placé sur une colonne de chaise,
    un support de siège (4) disposé sur le support de base (2) et mobile par rapport au support de base (2),
    et un support de dossier (5) relié au support de siège (4), le pivotement du support de dossier (5) provoquant le mouvement du support de siège (4) par rapport au support de base (2),
    le support de dossier (5), qui peut pivoter sur un axe transversal (12), étant relié directement au support de base (2) de manière articulée,
    le support de dossier (5) étant relié au support de siège (4) par le biais d'un élément d'accouplement (36), l'élément d'accouplement (36) étant relié de manière articulée au support de dossier (5) et au support de siège (4), la force introduite dans le support de siège (4) lors du pivotement du support de dossier (5) étant introduite exclusivement dans le support de siège (4) par le biais de l'élément d'accouplement (36),
    un premier élément de guidage (21, 23) étant prévu au niveau du support de base (2) et un deuxième élément de guidage (22, 24) étant prévu au niveau du support de siège (4), le premier élément de guidage (21, 23) et le deuxième élément de guidage (22, 24) coopérant l'un avec l'autre en formant une paire d'éléments de guidage (16, 17) de telle sorte que le pivotement du support de dossier (5) cause le déplacement du deuxième élément de guidage (22, 24) le long du premier élément de guidage (21, 23) et donc le mouvement du support de siège (4) par rapport au support de base (2),
    deux paires d'éléments de guidage (16, 17) espacées l'une de l'autre dans la direction longitudinale (7) de la chaise étant prévues, à savoir une paire d'éléments de guidage avant (16) vue dans la direction longitudinale (7) de la chaise, et une paire d'éléments de guidage arrière (17) vue dans la direction longitudinale (7) de la chaise, caractérisé en ce que le point de liaison (43) de l'élément d'accouplement (36) au support de siège (4), lequel point de liaison servant lors d'un pivotement du support de dossier (5) de lieu (34) d'introduction de force dans le support de siège (4), n'est pas identique au point de liaison (16, 17) du support de siège (4) au support de base (2), lequel point de liaison servant de lieu (33) de guidage du support de siège (4) sur le support de base (2).
  2. Mécanisme synchrone (1) selon la revendication 1,
    caractérisé en ce que
    le premier élément de guidage (21, 23) comprend un élément coulissant ou roulant et le deuxième élément de guidage (22, 24) comprend une piste de coulissement ou de roulement le long de laquelle l'élément coulissant ou roulant se déplace,
    ou le deuxième élément de guidage comprend un élément coulissant ou roulant et le premier élément de guidage comprend une piste de coulissement ou de roulement le long de laquelle l'élément coulissant ou roulant se déplace.
  3. Mécanisme synchrone (1) selon la revendication 1 ou 2, caractérisé en ce que le lieu (34) d'introduction de force vu dans la direction longitudinale (7) de la chaise est toujours visible derrière la paire d'éléments de guidage avant (16), de préférence toujours entre la paire d'éléments de guidage avant (16) et la paire d'éléments de guidage arrière (17).
  4. Mécanisme de synchronisation (1) selon l'une des revendications 1 à 3, caractérisé en ce que la position du point de liaison (43) de l'élément d'accouplement (36) au support de siège (4) varie par rapport au lieu (42) du point de liaison (42) de l'élément d'accouplement (36) au support de dossier (5) en fonction de la position angulaire du support de dossier (5) .
  5. Mécanisme synchrone (1) selon l'une des revendications 1 à 4, caractérisé en ce que l'élément d'accouplement (36) se déplace, lors du pivotement du support de dossier (5) depuis la position non-pivotée jusque dans la position pivotée au maximum vers l'arrière par rapport à une position de départ dans laquelle l'axe longitudinal de corps (41) de l'élément d'accouplement (36) pointe obliquement vers l'arrière, au-delà de la verticale (46) jusque dans une position d'extrémité dans laquelle l'axe longitudinal de corps (41) de l'élément d'accouplement (36) pointe obliquement vers l'avant.
  6. Mécanisme synchrone (1) selon l'une des revendications 1 à 5, caractérisé en ce que la position de l'axe longitudinal de corps (41) de l'élément d'accouplement (36), laquelle varie lors du pivotement du support de dossier (5), s'écarte sensiblement de la courbe de mouvement (31) du support de siège (4) pendant tout le mouvement de pivotement du support de dossier (5).
  7. Mécanisme synchrone (1) selon l'une des revendications 1 à 6, caractérisé en ce que l'axe transversal (12), vu dans la direction longitudinale (7) du siège, est disposé derrière l'élément d'accouplement (36).
  8. Mécanisme synchrone (1) selon l'une des revendications 1 à 7, caractérisé en ce que le pivotement du support de dossier (5) vers l'arrière soulève le support de siège (4) conformément à la courbe de mouvement (31) du support de siège (4).
EP18000336.0A 2017-04-10 2018-04-09 Mécanique synchrone pour un siège de bureau Active EP3387957B1 (fr)

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DE102017107636.0A DE102017107636A1 (de) 2017-04-10 2017-04-10 Synchronmechanik für einen Bürostuhl

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IT201900002723A1 (it) * 2019-02-26 2020-08-26 Brado S P A Sedia
DE102020101033A1 (de) 2020-01-17 2021-07-22 Bock 1 Gmbh & Co. Kg Träger für ein Sitzmöbel
WO2022018644A1 (fr) 2020-07-22 2022-01-27 Formway Furniture Limited Chaise
US11690455B2 (en) 2020-09-18 2023-07-04 Dinkar Chellaram Synchronous-tilt reclining chair
DE102020129709B4 (de) 2020-11-11 2023-01-26 Bock 1 Gmbh & Co. Kg Schwenkmechanik

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DE10126001A1 (de) * 2001-05-18 2002-11-21 Bock 1 Gmbh & Co Vorgespannte Federanordnung, insbesondere zur Federbeaufschlagung von Synchronmechaniken von Bürostühlen
DE602006017384D1 (de) * 2005-08-18 2010-11-18 Itoki Corp Stuhl
TW200950726A (en) * 2008-06-06 2009-12-16 Fon Chin Ind Co Ltd Front-and-back reciprocating, reclining, lifting and lowering apparatus for a chair back
AU2010354307B2 (en) * 2010-05-26 2014-10-02 Takano Co., Ltd. Reaction Force Mechanism for Backrest of Chair and Chair Mounted with the Same
US9364091B2 (en) * 2010-08-25 2016-06-14 L&P Property Management Company Tilt mechanism for a chair and chair
TWM421757U (en) * 2011-09-20 2012-02-01 Wen-Shan Ke Guiding mechanism of seat cushion of chair
DE202011108433U1 (de) 2011-11-18 2012-01-05 Joachim Rainer Brüske Sitzmöbel bzw. Bürostuhl mit Synchron Mechanik
EP2772156B1 (fr) * 2013-02-27 2020-04-29 L&P Property Management Company Mécanisme d'inclinaison pour chaise et chaise
CN106455821A (zh) * 2014-04-17 2017-02-22 Hni技术公司 椅子和椅子控制组件、系统和方法
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DE102015111946A1 (de) * 2015-07-22 2017-01-26 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl

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DE102017107636A1 (de) 2018-10-11
US20180289159A1 (en) 2018-10-11
EP3387957A1 (fr) 2018-10-17
US10610019B2 (en) 2020-04-07

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