EP3253255B1 - Mecanisme synchrone - Google Patents

Mecanisme synchrone Download PDF

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Publication number
EP3253255B1
EP3253255B1 EP16703255.6A EP16703255A EP3253255B1 EP 3253255 B1 EP3253255 B1 EP 3253255B1 EP 16703255 A EP16703255 A EP 16703255A EP 3253255 B1 EP3253255 B1 EP 3253255B1
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EP
European Patent Office
Prior art keywords
spring
support
backrest
coupling element
movement
Prior art date
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Active
Application number
EP16703255.6A
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German (de)
English (en)
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EP3253255A1 (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
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Bock 1 GmbH and Co KG
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Publication date
Priority claimed from DE102015101546.3A external-priority patent/DE102015101546B4/de
Application filed by Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Publication of EP3253255A1 publication Critical patent/EP3253255A1/fr
Application granted granted Critical
Publication of EP3253255B1 publication Critical patent/EP3253255B1/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
    • A47C1/03261—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
    • 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

Definitions

  • the invention relates to a synchronous mechanism for a correlated seat-backrest movement of an office chair, with a placeable on a chair column base support, a seat support and a backrest support.
  • synchronous mechanism assemblies are understood in the seat base of an office chair, which provide for a coupled, a certain relative movement of the seat and backrest with each other bringing kinematics.
  • On the seat support of the usually provided with a padded seat seat of the office chair is mounted.
  • the backrest support which extends in a conventional manner from the actual synchronizing mechanism to the rear, carries on an upwardly extending arm, the backrest of the office chair.
  • Such self-adjusting synchronous mechanisms are not only often comparatively complicated constructed, consist of a variety of cooperating components and / or are expensive to assemble, but often claim a comparatively large space.
  • installation space also requires a device for adjusting the pivoting resistance of the backrest.
  • An object of the present invention is to provide a structurally simple self-adjusting synchronous mechanism, which requires a small space, despite the pivoting resistance of the backrest is adjustable. This object is achieved by a synchronous mechanism according to claim 1.
  • Advantageous embodiments of the invention are specified in the subclaims.
  • a synchronizing mechanism as defined in claim 1 for a correlated seat-backrest movement of an office chair including a base support placeable on a chair column, a seat support and a seat back support, the back support pivotable about both a first transverse axis Base support as well as articulated to the seat support and wherein the seat support is pivotally connected via a coupling element with the base support, wherein the coupling element is pivotally connected both to a second transverse axis pivotally connected to the base support and the seat support, wherein a spring mechanism for adjusting the Pivoting resistance of the backrest is provided, which spring mechanism has at least one spring element, wherein the at least one spring element is supported with its one spring end on the coupling element.
  • the one spring end of the at least one spring element is supported on the coupling element, it is first ensured in a simple manner that the spring element at a pivoting of the backrest support from a basic position in a pivoted position back to a whole specific, advantageous manner is applied.
  • a particularly advantageous spring force setting possible.
  • the number of coupling elements in particular the number of seat support and backrest support connecting elements, reduced, thereby achieving a particularly simple structural design of the mechanism, without sacrificing the desired functionality of a synchronous mechanism.
  • a deviating from the usual lifting movement of the seat seat movement can be provided, in which nevertheless the so-called "shirt extraction effect" is avoided.
  • a particularly high level of comfort is achieved without the need for more expensive and expensive
  • the backrest support pivotally connected both about a transverse axis and thus the main pivot axis of the mechanism defining the base support, as well as the seat support directly, ie directly and without the interposition of an additional component, such that a pivoting movement of the backrest from an initial position into a position pivoted backwards, an immediate lowering movement of the rear area of the seat support seen rearward induced rearwards and the seat support is pivotally connected to the base support via a hinged to the seat support and the base support coupling element such that during the pivoting movement the backrest of the basic position in the pivoted backward position, an immediate lifting movement of the seen in chair longitudinal direction front portion of the seat support to the rear above done.
  • the user's weight directly affects the swing resistance felt by the user.
  • a light user must overcome a significantly lower swing resistance when pivoting than a heavy user.
  • the special synchronous movement of the mechanism according to the invention is preferably achieved in a particularly simple manner that is defined by the positions of the pivot points of the backrest support on the base support on the one hand and on the seat support on the other hand rigidly connected to the backrest support or formed as an integral part of the backrest support coupling element , In other words, between backrest support and Seat support no mutually freely pivotable coupling element longer required. Instead, the backrest support itself serves as a coupling element.
  • a particularly suitable coupling geometry and a resulting synchronous movement is achieved in a preferred embodiment of the invention in that the pivot point of the rear coupling element seen in the seat longitudinal direction in the seat longitudinal direction in each position of the backrest support behind the pivot point of the rear coupling element to the base support and the pivot point of the front Coupling element on the seat support seen in the seat longitudinal direction in each position of the backrest support in front of the articulation point of the front coupling element is located on the base support.
  • the present synchronous mechanism is characterized in that it is particularly flat, so that a corresponding assembly requires very little space. This is true even if to support or influence the swivel resistance and / or to prevent the backrest tilts uncontrollably backwards and for a safe retrieval of the backrest from the pivoted position to the initial position as soon as the user no longer burdened the backrest ,
  • a spring mechanism is provided with one or more spring elements, since the spring mechanism can be designed such that the at least one spring element connects the coupling element with the base support or with the backrest support without needing beyond the already provided housing volume of the base support addition further additional space. This is especially true when the spring element with the coupling element on the one hand and with the rear region of the base support or is connected to the backrest support and thereby arranged comparatively flat lying in the interior of the assembly.
  • the spring mechanism comprises means for adjusting the spring force of the at least one spring element in such a way that the distance of the front end of the spring seen in chair longitudinal direction to the front transverse axis, ie to the connection axis of the base support and coupling element, is variable.
  • the effective lever arm which influences the actuation of the spring end and thus influences the pivoting resistance of the backrest carrier, namely the distance between the articulation point of the spring on the coupling element and the front transverse axis, can be lengthened or shortened.
  • the adjustment of the spring force is preferably carried out such that no work against the spring force must be performed.
  • the adjustment means are designed such that the variable-position front end of the spring is movable on a circular path with a substantially constant radius about the other, rear end of the spring. The bias of the spring element remains unchanged.
  • the adjusting means comprise a cam drive, which is connected to a cam carrier cam roller connected to the variable position spring end of the at least one spring element and by a manual or motorized by the user movement of the cam carrier in Positions of different spring force is movable.
  • a cam drive as adjusting means is advantageous because of the precisely defined by the predetermined curve slope movement curve of the spring end.
  • the adjusting means comprise a movement thread, with a threaded spindle and a threaded nut movably guided on the threaded spindle, wherein the threaded nut is connected to the spring element of the at least one spring element supported on the coupling element, and this spring end is moved by a movement of the threaded nut into positions of different spring force is movable.
  • the synchronous mechanism 100 has a base support 1, which by means of a cone seat 2 on the upper end of a chair column 10 (see Fig. 1 ) is set.
  • the synchronous mechanism 100 comprises a substantially frame-shaped seat support 3 and a fork-shaped in plan view backrest support 4, the cheeks 5 are arranged on both sides of the base support 1.
  • the seat support 3 is provided for receiving or mounting a preferably padded seat (not shown).
  • the assembly is done using not shown fasteners in the usual way.
  • a backrest not shown, is attached, which is height adjustable in modern office chairs.
  • the backrest can also be integrally connected to the backrest support 4.
  • the entire synchronous mechanism 100 is mirror-symmetrical with respect to its central longitudinal plane, as far as the actual kinematics is concerned. In that regard, in the following description is always based on both sides in pairs existing construction elements of the actual pivot mechanism.
  • Fig. 1 . 2 and 4 the basic position of the synchronizing mechanism 100 is shown, in which the seat support 3 assumes a substantially horizontal position.
  • Fig. 3 and 5 show the synchronous mechanism 100 in a maximum rearwardly pivoted position of the backrest support 4th
  • the backrest support 4 pivoting about a main pivot axis 11 of the synchronous mechanism 100 is pivotable in the pivoting direction 7 on the one hand with the rear area 9 of the base support 1 and on the other hand with the rear area 25 of the seat support 3 articulated.
  • the backrest support 4 is hinged with its extending in the direction of the front seat area 8 cheek 5 directly to the base support 1 and thus about a fixed main pivot axis of the synchronous mechanism 100 defining the first (rear) transverse axis 11 in the pivoting direction 7 pivotally. With an upwardly extending driver 12 of the cheek 5 of the backrest support 4 is connected to the seat support 3 directly articulated.
  • the defined by the articulation of the backrest support 4 on the base support 1 first hinge axis 13 is seen in the chair longitudinal direction 14 before the defined by the articulation of the backrest support 4 on the seat support 3 second hinge axis 15.
  • the second hinge axis 15 is indeed offset only slightly to the rear.
  • a zenith position immediately above the first hinge axis 13 can not be achieved.
  • a swinging out of the backrest support 4 from the basic position in a pivoted backward position is therefore always connected to a lowering S of the rear portion 25 of the seat support 3.
  • both axes of articulation 13, 15 are seen in the chair longitudinal direction 14 in front of the center of the cone seat 2.
  • the second hinge axis 15 seen in the chair longitudinal direction 14 behind the center of the cone seat 2, while the position of the first hinge axis 13 relative to the cone seat 2 is fixed.
  • a rigidly connected to the backrest support 4, formed as an integral part of the backrest support 4 coupling element 16 is defined as in Fig. 1 is shown symbolically with dotted line.
  • the coupling element 16 consists structurally exclusively of a part of the cheek 5.
  • the arrangement of the coupling element 16 immediately above the cone seat 2 contributes to an advantageous sequence of movement of the synchronous mechanism 100 at.
  • the front region 18 of the base support 1 is articulated to the front region 8 of the seat support 3.
  • a coupling element 21 is provided, on the one hand directly to the base support 1, namely about a second (front) transverse axis 19 pivotally, and on the other hand directly hinged to the seat support 3.
  • the pivot point of the coupling element 21 on the base support 1 and thus the third hinge axis 22 is located in the chair longitudinal direction 14 behind the articulation point of the coupling element 21 on the seat support 3 and thus behind the fourth hinge axis 23rd
  • the rear coupling element 16 shows in the chair longitudinal direction 14 seen from the first transverse axis 11 in each case obliquely upwards and to the rear and the front coupling element 21 shows seen in chair longitudinal direction 14, starting from the second transverse axis 19 in each case obliquely upwards and forwards.
  • the joint axes 15, 23 at the articulation points of the seat support 3 in the vertical direction always extend above the articulation axes 13, 22, which are defined by the articulation on the base support 1.
  • the coupling elements 16, 21 are arranged in a V-shape with each other, with the imaginary extension lines of the coupling elements 16, 21 intersecting below the base support 1.
  • the relative movement of seat support 3 and backrest support 4 to each other is determined by the position of the total of four by the ends of the two coupling elements 16, 21 extending, defined by the articulation points hinge axes 13, 15, 22, 23.
  • the described pivoting mechanism ensures that the backrest support 4 can be pivoted with the backrest about the rear transverse axis 11 serving as the main pivot axis, in this case the first articulation axis 13, in the pivoting direction 7.
  • the pivotal movement of the backrest to the rear induces an immediate lowering S of the rear portion 25 of the seat support 3 back down and the front portion 8 of the seat support 3 performs a lifting movement H to the rear top (see Fig. 1 ).
  • a pivoting of the backrest thus takes place at the same time a displacement of the seat support 3 to the rear, while the base support 1 with the pivot bearings 13, 22 remains fixed in position.
  • the mechanism has a spring mechanism for adjusting the pivoting resistance of the backrest.
  • This comprises at least one spring element 30, see Fig. 2 .
  • the spring element 30 exerts a spring force against the rearward Pivoting movement 7 of the backrest. In this case, the spring element 30 is acted upon pivoting of the backrest support 4.
  • the synchronous movement (seat and backrest) takes place against a more or less large spring resistance.
  • a spring assembly provided with a centrally disposed helical compression spring 30, which on the one hand on a front abutment 31 and on the other hand on a rear abutment 37 by means of spring plates 32, 34 is supported (not shown in detail in all figures).
  • the spring 30, which in detail alone in Fig. 2 is shown, this encompasses guide rods 33 which have the spring plates 32, 34 at their respective ends.
  • the spring 30 on one side namely at its front end of the spring 28, charged. More specifically, the at least one spring element 30 with its one, viewed in the chair longitudinal direction 14 rear spring end 27 is directly connected to the backrest support 4 or the base support 1, namely at the pivot point 40 at or near the position of these two components connecting main pivot axis 11 of Mechanism 100. With its other, seen in the chair longitudinal direction 14 front spring end 28, the spring element 30 is connected to the coupling element 21 such that a movement of the backrest from a basic position in a pivoted rearward position, an application of this front spring end 28 causes.
  • the front end of the spring 28 is connected to form a lever arm 36 spaced from the front transverse axis 19 with the coupling element 21.
  • the spring element 30 is a compression spring.
  • the connection point 42 of the spring end 28 with the coupling element 21 is located above the front transverse axis 19 and thus between the front transverse axis 19 and the articulation point 23 of the coupling element 21 on the seat support 3.
  • the connection point 42 of the spring 30 with the coupling element 21 is then seen in chair longitudinal direction 14 is always above and in front of the front transverse axis 19.
  • the coupling element 21 performs as a kind of link during a pivoting movement of the backrest or the seat hinged thereto to the backrest support 4 directed pivoting movement 29, so that a between the backrest support 4 or the base support 1 and the coupling element 21 clamped compression spring 30 is acted upon from the front becomes.
  • the position of the front articulation point 42 of the spring element 30 on the coupling element 21 defines the length of a lever arm 36 to the front transverse axis 19 of the mechanism 100.
  • the spring mechanism comprises means for adjusting the spring force of the at least one spring element 30 by changing the position of the front spring end 28. For this purpose, the distance of the front spring end 28 is changed to the front transverse axis 19.
  • the adjusting means are designed such that the front spring end 28 is movable on a circular path with a substantially constant radius about the rear spring end 27 of the spring element 30.
  • the rear spring end 27 remains positionally changeable during this adjustment.
  • the cam drive 43 has a manually and / or motor-operated, movably mounted on the coupling element 21, in particular rotatably mounted, preferably eccentric cam carrier 44, which cooperates with a scanning element serving as a cam roller 45, the with the curve 46 of the cam carrier 44 cooperates or is engaged.
  • the cam carrier 44 is designed as a cam, as shown, the cam roller 45 runs on one side on the curve 46, to which it is pressed by the at least one spring element 30.
  • the cam roller 45 is connected to the front spring end 28.
  • the cam roller 45 and thus the there attached spring end 28 can be moved in positions relative to the front transverse axis 19, which have different spring forces result.
  • the cam roller 45 is provided in the illustrated embodiment of the invention with a slide shoe 51 and is guided on an opening provided in the coupling element 21 open link 47 (see Fig. 2 ) or is otherwise connected to the coupling element 21.
  • the gate 47 is bent, namely circular executed such that the cam roller 45 and thus the front end of the spring 28 is movable on a circular path with a substantially constant radius about the other spring end 27.
  • the front end of the spring 28 of the spring element 30 is connected to the coupling element 21 by a bolt or other suitable for scanning the curve component to which the spring end 28 attached, for example, is mounted, guided in the coupling element 21 and stored.
  • a bolt or other suitable for scanning the curve component to which the spring end 28 attached for example, is mounted, guided in the coupling element 21 and stored.
  • the scanning component for example, the cam roller 45, in particular in a guide groove, a curved link or the like and is based on a defined, dependent on its position on the curve 46, the spring force of the spring element 30 determining position of the coupling element 21, wherein it from the Coupling element 21 associated front transverse axis 19 is spaced.
  • a suitable component for example in the form of a bolt, is used, on the one hand with an adjustable cam carrier 44, for example, the cam to cooperate and as cam follower 45 to scan the cam 46 of the cam 44, and at the same time on the other hand as a kind of sliding block act or cooperate with a shoe 51 or the like, which is supported on a sliding track, for example in the form of a curved link 47 on the coupling element 21.
  • an adjustable cam carrier 44 for example, the cam to cooperate and as cam follower 45 to scan the cam 46 of the cam 44, and at the same time on the other hand as a kind of sliding block act or cooperate with a shoe 51 or the like, which is supported on a sliding track, for example in the form of a curved link 47 on the coupling element 21.
  • the local course of the curve 46 defining troughs 48, 49 are provided, which at defined points of the curve 46 a sufficiently large self-locking, so a sufficient resistance against slipping of the cam roller 45 on the Curve 46, ensure.
  • the cam roller 45 remains in place, even if a cam carrier 44 is used to achieve the shortest possible adjustment in the adjustment of the spring force of the spring element 44, which has a curve 46 as steep as possible, ie a steep curve angle.
  • An advantage of the wells 48, 49 is that thereby a stepped adjustment of the spring force is possible, which is often considered advantageous from a user perspective, since the adjustment of the spring end with a more or less strong engagement of the cam roller 45 in the respective trough 48, 49 connected is, whereby the user receives a tactile feedback on a successfully completed adjustment.
  • it is also a version with continuous smooth edge of the curve possible.
  • the cam plate 44 is rotatably mounted about an axis of rotation 52 in the coupling element 21, wherein the axis of rotation 52 is located approximately centrally between the front transverse axis 19 and the articulation point 23 of the coupling element 21 on the seat support 3.
  • the rotation of the cam carrier 44 in the actuating direction 50 takes place, for example, by means of a manually operable handle, for example with a rotary handle or a handwheel (not shown).
  • This handle is mounted on the coupling element 21 and moves with the coupling element 21, so performs as well as the coupling element 21 during pivoting of the backrest support 4, a pivoting movement 41 to the rear.
  • the cam carrier 44 can also be driven via levers, Bowden cables, etc.
  • a (electric) motor drive can be provided instead of a manual operation.
  • the cam carrier 44 is designed such that the cam roller 45 is forcibly guided on or in the curve 46 of the cam carrier 44.
  • the cam carrier 44 preferably has a guide groove designed as a spiral curve for the cam roller 45.
  • the adjustment can be made stepless in any case.
  • a large or small cam 46 can be used.
  • curve 46 can be used with a low or a steep slope.
  • the adjustment characteristic of the pivoting resistance can be set.
  • FIG. 6 and 7 the basic position of the synchronizing mechanism 101 is shown, in which the seat support 3 occupies a substantially horizontal position.
  • Fig. 8 and 9 show the synchronous mechanism 101 in a maximum rearwardly pivoted position of the backrest support 4th
  • a spring arrangement with a centrally disposed helical compression spring 30 which is supported on the one hand on a front abutment 31 and on the other hand on a rear abutment 37 by means of spring plates 32, 34.
  • the spring 30 (only in Fig. 6 indicated) surrounds guide rods 33 which have the spring plates 32, 34 at their respective ends.
  • the spring 30 Upon pivoting of the backrest support 4, the spring 30 on one side, namely at its front end of the spring 28, charged.
  • the rear spring end 27 is directly connected to the base support 1.
  • the spring element 30 With its front spring end 28, the spring element 30 is connected to the coupling element 21 such that a movement of the backrest from a basic position to a rearward pivoted position causes an actuation of this front spring end 28.
  • the front end of the spring 28 is again connected to the formation of a lever arm 36 spaced from the front transverse axis 19 with the coupling element 21.
  • the connection point 42 of the spring end 28 with the coupling element 21 is thus again seen in the chair longitudinal direction 14 above and in the untwisted state in front of the front transverse axis 19th
  • the coupling element 21 performs as a kind of link during a pivoting movement of the backrest or of the seat hinged thereto a seat back support 4 directed towards pivoting movement 29, so that the compression spring 30 is acted upon from the front.
  • the means for adjusting the spring force are designed such that the front spring end 28 is movable on a circular path with a substantially constant radius about the rear spring end 27 of the spring element 30.
  • the rear spring end 27 remains positionally changeable during this adjustment.
  • the movement of the position of the front spring end 28 takes place here by means of a movement thread 53.
  • the movement thread 53 comprises a threaded spindle 55 and a threaded spindle 55 movably guided on the threaded nut 56.
  • the threaded nut 56 is with the spring end 28 of the at least one spring element 30 supported on the coupling element 21 is connected directly or indirectly.
  • the front spring end 28 is movable by a movement of the threaded nut 56 on the threaded spindle 55 in positions relative to the front transverse axis 19, which result in a different spring force.
  • the threaded spindle 55 is mounted on both sides at fixed bearing points 57, 58 within the coupling element 21, so that the threaded spindle 55 pivots with the coupling element 21. Also in the backward pivoted state, as in Fig. 8 and 9 shown, the threaded nut 56 remains at their respective place on the threaded spindle 55, since a self-locking thread (trapezoidal thread) is used.
  • the threaded spindle 55 is rotatably mounted in the bearing points 57, 58. Upon rotation of the threaded spindle 55 (rotational movement), the threaded nut 56 on the threaded spindle 55 is moved up and down (linear movement). The threaded spindle 55 is manually and / or motor actuated.
  • the threaded nut 56 is connected in the illustrated embodiment of the invention with a shoe 54 and is guided on an opening provided in the coupling element 21 open link 47.
  • the gate 47 is bent, namely executed circular.
  • the threaded nut 56 on both sides in the transverse direction of the threaded nut 56 outstanding Bearing journals 60, on which the sliding shoe 54 is mounted, see Fig. 10 .
  • the shoe 54 has for this purpose suitable bearings 61 for receiving the bearing pin 60.
  • the shoe 54 is hereby given an additional rotational degree of freedom.
  • the sliding shoe 54 can thus be pivoted about the pivot axis 59 in the pivoting direction 63 relative to the threaded nut 56 in order to follow with its sliding surface 62 the course of the link 47.
  • the shoe 54 is decoupled from the threaded nut 56 with respect to this degree of freedom.
  • the sliding on the gate 47 sliding surface 62 of the shoe 54 is opposite a bearing surface 63 of the shoe 54, at which the front end of the spring 28, more precisely, the spring plate 32 is supported to form the front abutment 31.
  • the example shown serves a rotatably at the lower end of the threaded spindle 55 with the spindle 55 Connected drive wheel 62, for example, gear (spur gear) running, for transmitting an external rotational movement on the threaded spindle 55.
  • the drive wheel 62 may for this purpose, if necessary with the interposition of one or more suitable transmission or gear stages, with an electric motor drive or on be provided appropriate location of the mechanism provided handwheel or the like (not shown in the figures).

Claims (3)

  1. Mécanisme synchrone (100, 101) pour un déplacement corrélé d'un siège et d'un dossier d'une chaise de bureau, comprenant un support de base (1) pouvant être placé sur un pied de chaise (10), un support de siège (3) et un support de dossier (4),
    le support de dossier (4) étant raccordé au support de base (1) de façon à pouvoir pivoter autour d'un axe transversal (11) ainsi qu'au support de siège (3) de manière articulée de telle sorte qu'un mouvement de pivotement (7) du dossier d'une position de base dans une position pivotée vers l'arrière induise un mouvement d'abaissement immédiat (S) vers l'arrière et vers le bas de la région (25) arrière, vue dans la direction longitudinale de la chaise (14), du support de siège (3), et
    le support de siège (3) étant raccordé de manière articulée au support de base (1) par le biais d'un élément d'accouplement (21) de telle sorte que lors du mouvement de pivotement (7) du dossier de la position de base dans la position pivotée vers l'arrière, il se produise un mouvement de levage immédiat (H) vers l'arrière et vers le haut de la région (8) avant, vue dans la direction longitudinale de la chaise (14), du support de siège (3),
    l'élément d'accouplement (21) étant raccordé au support de base (1) de façon à pouvoir pivoter autour d'un deuxième axe transversal (19) ainsi qu'au support de siège (3) de manière articulée,
    un mécanisme à ressort pour l'ajustement de la résistance de pivotement du dossier étant prévu, lequel mécanisme à ressort comprend au moins un élément de ressort (30),
    ledit au moins un élément de ressort (30) s'appuyant contre l'élément d'accouplement (21) par l'une de ses extrémités de ressort (28),
    le mécanisme à ressort comprenant des moyens (53) pour l'ajustement de la force de ressort dudit au moins un élément de ressort (30) de telle sorte que la distance de l'extrémité de ressort (28) s'appuyant contre l'élément d'accouplement (21) au deuxième axe transversal (19) puisse être modifiée, les moyens d'ajustement (53) comprenant un filetage de mouvement, avec une broche filetée et avec un écrou fileté guidé de manière mobile sur la broche filetée, l'écrou fileté étant raccordé à l'extrémité de ressort (28), s'appuyant contre l'élément d'accouplement (21), dudit au moins un élément de ressort (30), et cette extrémité de ressort (28) pouvant être déplacée par un mouvement de l'écrou fileté dans des positions de forces de ressort différentes.
  2. Mécanisme synchrone (100, 101) selon la revendication 1, dans lequel ledit au moins un élément de ressort (30) s'appuie, par son autre extrémité de ressort (27), contre le support de base (1) ou contre le support de dossier (4).
  3. Mécanisme synchrone (100, 101) selon la revendication 1 ou 2, dans lequel les moyens d'ajustement (53) sont réalisés de telle sorte que l'extrémité de ressort (28) s'appuyant contre l'élément d'accouplement (21) peut être déplacée sur une trajectoire circulaire de rayon sensiblement constant autour de l'autre extrémité de ressort (27) de cet élément de ressort (30).
EP16703255.6A 2015-02-03 2016-02-03 Mecanisme synchrone Active EP3253255B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015101546.3A DE102015101546B4 (de) 2015-02-03 2015-02-03 Synchronmechanik
PCT/EP2016/000170 WO2016124328A1 (fr) 2015-02-03 2016-02-03 Mecanisme synchrone

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Publication Number Publication Date
EP3253255A1 EP3253255A1 (fr) 2017-12-13
EP3253255B1 true EP3253255B1 (fr) 2019-05-08

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DE102019113582B4 (de) * 2019-05-21 2022-06-15 Bock 1 Gmbh & Co. Kg Synchronmechanik

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