EP3599938B1 - Système d'articulation pour chaises - Google Patents

Système d'articulation pour chaises Download PDF

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Publication number
EP3599938B1
EP3599938B1 EP18728756.0A EP18728756A EP3599938B1 EP 3599938 B1 EP3599938 B1 EP 3599938B1 EP 18728756 A EP18728756 A EP 18728756A EP 3599938 B1 EP3599938 B1 EP 3599938B1
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EP
European Patent Office
Prior art keywords
support
seat
slot
articulation system
articulation
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EP18728756.0A
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German (de)
English (en)
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EP3599938A1 (fr
EP3599938C0 (fr
Inventor
Sergio Moreschi
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CO FE MO Industrie Srl
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CO FE MO Industrie Srl
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Publication of EP3599938A1 publication Critical patent/EP3599938A1/fr
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Publication of EP3599938B1 publication Critical patent/EP3599938B1/fr
Publication of EP3599938C0 publication Critical patent/EP3599938C0/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
    • A47C1/032—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
    • A47C1/03261—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 present invention relates to an articulation system for chairs, in particular of the type in which the movements of seat and backrest are synchronized with each other.
  • chairs in particular for office, which comprise an articulation system comprising a rigid frame bound to a support base for resting the chair on the ground, a support for the seat and a support for the backrest for the chair.
  • the support for the seat and the support for the backrest are distinct and separate from each other, and are both articulated with respect to the frame and furthermore, thanks to an articulation mechanism that connects them, they are mutually articulated so that a movement of one corresponds to a predetermined movement of the other.
  • the articulation system that connects the two supports is adjustable so that the relationship between the two movements can be varied.
  • the system opposes an elastic reaction which tends to set back both supports in the at-rest configuration (i.e. without stress).
  • Said reaction is typically obtained by means of an elastic element, for example at least one spring.
  • the reaction of the system is adjustable for a given tilting, for example thanks to a user-operated adjustment system to vary the degree of preloading of the elastic element or the position of at least one anchorage point of the elastic element to the frame and/or to one of the two supports.
  • DE 202005010097U1 and DE 4208648C1 each discloses a synchronized mechanism for a correlated seat/backrest movement of a chair.
  • WO 2009/153811 A1 discloses an adjustment device for chairs comprising a main body, engageable on a support stem of a chair; a support for the seat mounted on the main body; a support for the backrest mounted on the main body; and articulation means for engaging the support for the backrest and the support for the seat to the main body, the articulation means comprising a lever rotating with respect to the main body and hinged to the support for the seat and the support for the backrest, in order to obtain a determined movement relationship between the support for the backrest and the support for the seat.
  • WO 2010/097818 A1 discloses a device for synchronizing the inclination of the backrest and of the seat of a chair, of the type comprising a backrest frame, a seat frame and a support firmly constrained to the base of the chair, a first crank firmly constrained to the frame of the backrest and hinged to the back of the seat frame and to the support, and a second crank hinged to the front part of the seat frame and to the support, to form, together with the seat frame, an articulated quadrilateral.
  • the Applicant has observed that the articulation systems of WO 2009/153811 A1 and WO 2010/097818 A1 , due to their own structure based on levers or cranks pivoted on the frame, determine a rototraslational movement of the seat in which the vertical and horizontal components of the translational motion of the front of the seat are fixedly determined.
  • the Applicant has observed that the front hinge point of the seat spans an arc of a circle with the centre facing the rear part of the system, and this implies that, given a certain relationship between the vertical component and the horizontal component of the translational motion of the front part of the seat in the initial part of the movement, this relationship changes during the movement progressively unbalancing towards the horizontal component to the detriment of the vertical one.
  • the lifting rate of the front part of the seat per tilting unit of the backrest is progressively lower as the degree of tilting of the backrest increases with respect to the at-rest position. This means that the effect of the weight of the user on the seat, which tends to oppose to the inclination ('weighing-people'), tends to decrease as the tilting of the backrest increases, until it is cancelled and potentially changes orientation with wider tilting.
  • this behaviour determines a response to the tilting perceived by the user that is not always optimal along the entire tilting range, and/or determines limitations in the tilting amplitude of the backrest and/or of the seat.
  • An object of the present invention is to provide an articulation system for chairs which solves one or more of the problems described above.
  • the invention relates to an articulation system for chairs according to claim 1.
  • the present invention relates to a chair according to claim 14.
  • vertical, horizontal, upper, lower and the like refer to a condition of normal use of a chair incorporating the articulation system of the present invention.
  • front and rear refer to a normal use of a chair embodying the present invention, wherein the user's legs are located at the front portion of the system.
  • the synchronized articulation systems between backrest and seat of WO 2009/153811 A1 and WO 2010/097818 A1 which use articulation rods between the seat and the frame, make the front hinge point of the seat be forced to span, on the reference plane, a circle arc trajectory with concavity facing the axis of rotation of the rear articulation rod.
  • This movement of the front hinge point constitutes a mechanical constraint which limits the possibility of designing more ergonomic movements of the seat and/or backrest.
  • the present solution instead, thanks to the articulation between the front part of the seat and frame through pin and slot allows a great versatility in the design of the slot and therefore in the movement of the front part of the seat.
  • the present solution allows, for example, to avoid upper dead spots for the front part of the seat.
  • the present solution allows to maintain a desired lifting rate of the front part of the seat as a function of the rotation of the articulation element, throughout the entire rotation of the latter.
  • This lifting rate depends on the specific design of the slot.
  • the support is subject to the weight force of the user, which generates a substantially vertical weight force acting on the slot.
  • This weight force can be instantaneously decomposed into a component tangential to the slot in the instant contact point and into a component perpendicular to it (which is cancelled by the constraining reaction which has application point in the instant contact point between pin and slot).
  • the tangential component of the weight force tends to push down the support in opposition to the tilting motion and this component must be won to effect and maintain the tilting. Therefore, as the weight of the user varies, the reaction of the system to a tilting is more intense the heavier is the user, even in the absence of adjustments of the reaction of the elastic element.
  • the tilting force When the support for the seat is stressed in rotationally translation (for example by exerting a tilting force on the backrest that is articulated to the seat), the tilting force generates an action force on the slot which produces the relative motion between pin and slot and therefore the rotationally translation of the seat.
  • the action force can be decomposed into its two components: the one tangential to the slot in the reaction point and the one perpendicular to the first.
  • the perpendicular component is cancelled by the constraining reaction of the slot-pin coupling (which has an application point in the point of instant contact between pin and slot, wherein the perpendicular component of the action force and the constraining reaction push the pin against the slot), while the tangential component is the one that produces the relative movement between pin and slot.
  • the pin-slot coupling involves a sliding friction (static and dynamic) between the pin and slot surfaces in mutual sliding.
  • This friction having an application point in the instant contact point, is generally proportional to the overall constraining reaction perpendicular to the contact surface, which tends to push the pin and the slot against each other.
  • This overall constraining reaction comprises the aforesaid component of the weight force perpendicular to the tangential component (and possibly the perpendicular component of the action force). Therefore, as the user's weight varies, the sliding friction force is greater the greater is the weight of the user and this effect contributes to the variation of the reaction of the system according to the user's weight.
  • the slot having at least partially curvilinear development may make the reaction of the system to vary as a function of the tilting. This is particularly advantageous in the absence of a system for adjusting the reaction of the elastic element for a given tilting.
  • the present invention in one or more of the aforesaid aspects may have one or more of the following preferred characteristics, some of which refer to the aforesaid reference plane.
  • said support for the seat is directly hinged to said articulation element.
  • said system is structurally simple and rational.
  • the system comprises an articulation element as described above for each side of the articulation system.
  • the present invention also provides for solutions in which said angle is equal to zero in at least one tilting configuration, for example in the at-rest configuration.
  • at least one portion of the slot can be horizontal.
  • said slot has a development entirely rectilinear.
  • the system provides a substantially regular reaction along the entire tilting (for example, the tilting force applied at one point of the backrest is substantially linear with the resulting tilting angle).
  • the relationship between the horizontal and vertical components of the translational motion of the front part of the seat remains substantially constant throughout the tilting excursion.
  • this comparative embodiment is particularly advantageous in combination with a system for adjusting the reaction of the elastic element for a given tilting.
  • said slot has a development entirely curvilinear.
  • said angle in said at-rest configuration is greater than or equal to 10°, more preferably greater than or equal to 15°, and/or less than or equal to 50°, more preferably less than or equal to 40°.
  • said angle in said maximum tilting configuration is greater than or equal to 40°, more preferably greater than or equal to 50°, even more preferably greater than or equal to 60°.
  • said slot has concavity facing downwardly and rearwardly.
  • the relationship between horizontal and vertical components develops in an opposite way with respect to the development that is obtained in the case of a front lever or crank articulation (that is, a circular arc with concavity facing rearwards).
  • the lifting rate may increase as the rotation of the articulation element increases.
  • said angle in said at-rest configuration is less than or equal to said angle in said maximum tilting configuration.
  • said angle gradually increases (more preferably monotonically) throughout at least one portion of, more preferably throughout the entire, movement of the articulation system from the at-rest configuration to the maximum tilting configuration.
  • the tangential component of the weight force increases progressively to the detriment of a decrease in the perpendicular component of the weight force.
  • the tilting force necessary for the tilting must overcome, in addition to any elastic spring reaction force (which substantially increases linearly with the tilting angle), also the aforesaid tangential component of the weight force, which increases progressively and the greater the heavier is the user, provided that the tangential component of the action force decreases.
  • the result of these effects is a gradual hardening of the reaction as the tilting increases, additional to that of the spring's elastic return force, and proportional to the user's weight.
  • the Applicant observes that as the tilting increases, the contribution to the sliding friction force provided by the weight force decreases, while the contribution to the sliding friction force provided by the action force increases, thereby always ensuring the presence of friction.
  • the development of the slot comprises both a rectilinear portion, preferably comprising a location point of the pin in the at-rest configuration, and a curvilinear portion, preferably comprising a location point of the pin in the maximum tilting configuration.
  • said curvilinear development is in the shape of a substantially circular arc having a centre placed in a lower-rear quadrant with respect to the slot.
  • said circular arc has a radius greater than or equal to 50 mm, more preferably greater than or equal to 60 mm, and/or less than or equal to 200mm, more preferably less than or equal to 150mm.
  • said slot is afforded in a respective lateral wall of the support for the seat.
  • said pin is integral (that is, in a single piece) with said frame.
  • the present solution reduces production costs, since the pin can be moulded together to the frame and therefore does not require production and assembly as a separate element.
  • the hinge point is located, with reference to said reference plane, above a horizontal line passing through said axis of rotation.
  • the hinge point in said at-rest configuration and/or in said maximum tilting configuration, is located, with reference to said reference plane, in front of a vertical line passing through said axis of rotation
  • the hinge point in said at-rest configuration and/or in said maximum tilting configuration, is located, with reference to said reference plane, in back of a vertical line passing through said axis of rotation.
  • the support for the backrest is firmly constrained to said articulation element.
  • the articulation element may be a whole with said support for the backrest, or the support for the backrest can be rigidly fixed to the articulation element. In this way the system as a whole is constructively simple, reliable and economical in its construction.
  • the support for the backrest is connected to the articulation element in an articulated manner. In this way, further degrees of freedom are introduced between the backrest and the seat, for greater ergonomics and/or versatility and/or comfort of the chair.
  • the articulation system comprises a further articulation element, rigid and hinged to said frame to rotate about a further axis of rotation, wherein said support for the backrest is hinged to said articulation element at a side of the articulation element opposite to said hinge point of the seat with respect to said axis of rotation, and it is also hinged to said further articulation element.
  • the articulation system comprises at least one elastic element (e.g. a spring) operatively interposed between said frame and said support for the seat and/or between said frame and said support for the backrest.
  • the elastic reaction force developed by the elastic element counteracts the tilting with respect to the at-rest configuration, typically all the greater the wider is the tilting.
  • said elastic element is configured to operate in extension.
  • said elastic element exerts a residual elastic return force between support and frame ('preload').
  • said elastic element has a first end (directly) abutted to the frame and a second end (directly) abutted to the hinge point and/or to the support for the seat.
  • the first end of the elastic element is directly abutted to a pin firmly constrained to said frame and arranged in a front-lower portion of the frame.
  • the second end of the elastic element is directly abutted to a hinge pin coinciding with said hinge point.
  • the articulation system comprises an adjustment system structured to move a first and/or a second end of said elastic element with respect to the frame and/or the support for the backrest, and/or to vary the elastic constant of the elastic element.
  • the user can adjust the 'hardness' of the response for a given tilting.
  • a first end of the elastic element is abutted to a pin movable with respect to said frame and, preferably, a second end of the elastic element is abutted to a hinge pin coinciding with said hinge point.
  • the chair comprises a supporting base for resting it on the ground and a stem mounted on the supporting base, said frame being rigidly mounted at an upper end of said stem.
  • the articulation system 1 comprises a rigid frame 2, which is for example designed to be rigidly mounted at an upper end of a stem 3 mounted on a supporting base (not shown) for resting a chair on the ground.
  • the articulation system 1 further comprises a support for the seat 4, rigid, and a support for the backrest 5, rigid and distinct from the support for the seat, mounted on the frame in an articulated manner.
  • the support for the seat consists of two separate parts, one for each side of the system.
  • the chair typically comprises a seat 6 rigidly coupled to the support for the seat 4 and a backrest 7 rigidly coupled to the support for the backrest 5.
  • the stem, the seat and the backrest are shown schematically in dashed lines only in fig. 1 , as for example of a known type.
  • the articulation system further comprises, for each side of the articulation system, an articulation element 14, rigid and hinged to the frame to rotate about an axis of rotation 15.
  • the support for the backrest 5 is a whole (i.e. a single piece) with the articulation element 14.
  • the support for the backrest can be distinct from the articulation element, but rigidly fixed to the latter. In both cases, during the tilting, the backrest simply rotates around the axis of rotation 15, for example for a maximum tilting amplitude of 18°.
  • the support for the backrest is connected to the articulation element in an articulated manner, similarly to the articulation of the support for the backrest with respect to the frame and to the support for the seat described in the aforesaid document WO 2009/153811 A1 , to which reference is made for details.
  • the support for the seat 4 is directly hinged to the articulation element in a hinge point 16.
  • the hinge can be made with a single pin passing through the entire system, or a pair of pins, one for each side, each pin being firmly constrained to the support for the seat 4 and the articulation element 14.
  • the articulation system 1 comprises at least one elastic element 20 (shown partially or schematically), for example a spring, operatively interposed between the frame 2 and the support for the seat 4, to counteract the rotationally translation of the seat with respect to the at-rest configuration, all the greater the wider is the rotationally translation.
  • at least one elastic element 20 shown partially or schematically, for example a spring, operatively interposed between the frame 2 and the support for the seat 4, to counteract the rotationally translation of the seat with respect to the at-rest configuration, all the greater the wider is the rotationally translation.
  • the articulation system further comprises, for each side, a pin 9 firmly constrained to a front portion of the frame 2 and a slot 8 afforded in a front portion of the support for the seat 4, the pin engaging the slot slidably.
  • each slot 8 is afforded in a side and vertical wall of the respective part of the support for the seat and each pin 9 protrudes from a side and vertical wall of the frame towards the outside.
  • the pin 9 is integral (that is, in a single piece) with the frame.
  • the articulation element 14 and the pin-slot coupling allow the articulation system to assume an at-rest configuration (shown in figures 1 and 3 ), in the absence of tilting forces acting on the support for the seat and/or on the support for the backrest (or when said tilting forces do not exceed the possible preloading force of the elastic element 20), and a maximum tilting configuration (shown in figures 2 and 4 ), where the support for the seat is rotationally translated with respect to its position in the at-rest configuration and the support for the backrest assumes the maximum possible tilting with respect to the at-rest position.
  • the slot slides with respect to the pin.
  • the seat 6 is arranged horizontally and/or the backrest 7 is substantially vertical.
  • figures 1-4 show a view of one side of the system 1, the side being defined with respect to the cinematic axes.
  • the sides of the system it is meant the two opposite portions of the system with respect to a median plane of the system perpendicular to the cinematic axes (e.g. axes 15, 16 etc).
  • the articulation system is specular with respect to the median plane, possibly with the exception of the elastic element which may be present only on one side or may have differences between the two sides. Therefore, for example, the elements illustrated are symmetrically reproduced also on the side of the system opposite to that shown.
  • the slot 8 has a development at least partially curvilinear, preferably with concavity facing substantially inferiorly and rearwardly.
  • an angle 18 is defined as the acute angle formed between a tangent 11 to the slot in an instant contact point 12 between the slot and pin and a horizontal line 13, the angle being above the horizontal line.
  • the angle faces rearwards.
  • the slot 8 has entirely curvilinear development, wherein the angle 18 increases monotonically throughout the movement of the articulation system from the at-rest configuration to the maximum tilting configuration.
  • the curvilinear development follows a spline and the acute angle in the at-rest configuration is equal to 45° and in the maximum tilting configuration it is equal to 80°.
  • the curvilinear development can be approximated to a circular arc having radius, at the centre of the slot, of 18.5 mm.
  • the hinge point 16 in the at-rest and maximum tilting configuration, is located, with respect to the reference plane, in front of a vertical line 30 passing through the axis of rotation 15, and above a horizontal line 13 passing through the axis of rotation.
  • the seat rotation in the transition from the at-rest configuration to that of maximum tilting, the seat rotationally translates in such a way that both the rear and the front part (the latter in greater measure) lift and retract (giving the 'weighing people' effect).
  • the relative ratio between the lift and the retraction of the front part varies as a function of the tilting, wherein in the final part of the movement the lift has a higher prevalence than in the beginning of the movement.
  • This embodiment can therefore be advantageously free of a system for adjusting the reaction of the elastic element.
  • a first end of the elastic element 20 is directly abutted to a fixed pin 17 firmly constrained to the frame and arranged in a front-lower portion of the frame and a second end of the elastic element is directly abutted to the hinge pin coinciding with the hinge point 16.
  • the development of the slot is entirely curvilinear and can be exemplarily approximated to a circular arc having radius, at the center of the slot, of 157,5mm.
  • Exemplarily the angle 18 in the at-rest configuration is equal to 3°.
  • the hinge point 16 is preferably located in back of the vertical line 30 with respect to the axis of rotation 15, and above the axis of rotation.
  • the seat rotation in the transition from the at-rest configuration to that of maximum tilting, the seat rotationally translates moving rearwards and in such a way that the front part remains substantially at the same height (the 'weighing-people' effect is therefore negligible). Therefore, preferably, this embodiment comprises an adjusting system of the reaction of the elastic element.
  • a second elastic element 21 having a first end abutted to a pin 23 movable with respect to the frame 2 (by an adjustment system operated by the user and not shown in detail being, for example, of the known type) and a second end abutted to the pin of the hinge point 16.
  • Figures 5A and 5B schematically show, for purely illustrative purposes, the slot-pin coupling, respectively in the at-rest configuration and in the maximum tilting configuration.
  • the number 50 indicates the weight force and the number 51 indicates the action force, these forces acting on the slot 8 of the support.
  • the ratio between the magnitudes of the weight force and the action force is totally arbitrary, for illustrative purposes only.
  • the numbers 50' and 51' indicate the respective component of the forces along the tangent 11 at the slot in the contact point 12 and the numbers 50" and 51" indicate the respective component of the forces along the direction perpendicular to the tangent 11.
  • the vector 52 indicates the constraining reaction between pin and slot, perpendicular to the tangent 11, having magnitude equal to the sum of the components 50" and 51".
  • the components 50" and 51" and the reaction 52 push the pin and the slot one against each other and are responsible for the sliding friction.
  • the present invention also provides for solutions (not shown) in which said side walls are located internally.
  • the pins which can also be only one
  • the connecting element which in the shown examples is interposed between frame and support for the seat, can alternatively be placed internally to the frame or externally to the support for the seat.
  • the present invention also provides for solutions (not shown) wherein the slots have a development comprising both a rectilinear portion, preferably comprising the point where the pin is located in the at-rest configuration, and a curvilinear portion, preferably comprising the point in which the pin is located in the maximum tilting configuration.
  • the present invention also provides for solutions (not shown) wherein the curvilinear slot is combined with a location of the hinge point in back of the vertical line 30 with respect to the axis of rotation.

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

Claims (14)

  1. Système d'articulation (1) pour chaises, le système comprenant :
    - un châssis (2) conçu pour être associé à une base d'une chaise ;
    - un support pour un siège (4) monté sur ledit châssis ;
    - au moins un élément d'articulation (14) qui est rigide et monté articulé sur ledit châssis, de sorte qu'il peut tourner autour d'un axe de rotation (15), dans lequel ledit support de siège est monté articulé sur ledit élément d'articulation en correspondance d'un premier point de charnière (16) ;
    - un support de dossier (5), distinct dudit support de siège (4) et couplé audit élément d'articulation ;
    dans lequel le système d'articulation comprend en outre, pour chaque côté, une goupille (9) qui est fermement contrainte à une portion avant dudit châssis et une fente (8) réalisée dans une portion avant du support de siège, la goupille s'engageant de manière coulissante dans la fente,
    dans lequel ledit élément d'articulation (14) et lesdites goupille (9) et fente (8) sont configurées de manière à ce que ledit système d'articulation (1) prenne une configuration au repos, en l'absence de forces de basculement agissant sur le support de l'assise et/ou sur le support de dossier, et une configuration de basculement maximum dans laquelle ledit support de l'assise est translaté en rotation par rapport à la configuration au repos, ladite goupille glisse le long de ladite fente pendant la transition du système d'articulation de la configuration au repos à la configuration d'inclinaison maximale et vice versa, et dans lequel, dans un plan de référence perpendiculaire audit axe de rotation, un angle (18), défini comme un angle aigu formé entre une tangente (11) à la fente en un point de contact instantané (12) entre la fente et la goupille et une ligne horizontale (13), au-dessus de la ligne horizontale, est tourné vers l'arrière,
    dans lequel ladite fente (8) présente un développement au moins partiellement curviligne,
    caractérisé en ce que ledit angle (18) augmente progressivement tout au long au moins d'une portion du mouvement du système d'articulation (1) de la configuration au repos à la configuration d'inclinaison maximale.
  2. Système d'articulation selon la revendication 1, dans lequel ledit angle (18) dans ladite configuration au repos est inférieur ou égal audit angle dans ladite configuration d'inclinaison maximale.
  3. Système d'articulation selon la revendication 1 ou 2, dans lequel ledit angle (18) dans ladite configuration au repos est supérieur ou égal à 10°, et/ou inférieur ou égal à 50°, et dans lequel ledit angle dans ladite configuration d'inclinaison maximale est supérieur ou égal à 40°.
  4. Système d'articulation selon l'une quelconque des revendications précédentes, dans lequel ledit angle (18) augmente progressivement tout au long du mouvement du système d'articulation depuis la configuration au repos jusqu'à la configuration d'inclinaison maximale.
  5. Système d'articulation selon l'une quelconque des revendications précédentes, dans lequel ladite fente (8) est réalisée dans une paroi latérale respective du support de siège, et dans lequel ladite goupille (9) fait partie intégrante dudit châssis.
  6. Système d'articulation selon l'une quelconque des revendications précédentes, dans lequel, dans ladite configuration au repos, le point d'articulation (16) est situé, en référence audit plan de référence, devant une ligne verticale (30) passant par ledit axe de rotation (15).
  7. Système d'articulation selon l'une quelconque des revendications 1 à 5, dans lequel, dans ladite configuration au repos, le point d'articulation (16) est situé, en référence audit plan de référence, à l'arrière d'une ligne verticale (30) passant par ledit axe de rotation (15).
  8. Système d'articulation selon l'une quelconque des revendications précédentes, comprenant au moins un élément élastique (20, 21) interposé de manière opérationnelle entre ledit châssis et ledit support de siège et/ou entre ledit châssis et ledit support de dossier.
  9. Système d'articulation selon la revendication précédente, comprenant en outre un système de réglage structuré pour déplacer une première et/ou une deuxième extrémité dudit élément élastique (21) par rapport au châssis et/ou au support de dossier, et/ou pour faire varier la constante élastique de l'élément élastique (21).
  10. Système d'articulation selon l'une quelconque des revendications précédentes, dans lequel ladite fente (8) a un développement entièrement curviligne.
  11. Système d'articulation selon l'une quelconque des revendications précédentes, dans lequel ladite fente (8) présente une concavité orientée vers le bas et l'arrière.
  12. Système d'articulation selon l'une des revendications 1 à 9, dans lequel le développement de la fente comprend une portion rectiligne.
  13. Système d'articulation selon la revendication 12, dans lequel ladite portion rectiligne comprend un point d'emplacement de la goupille dans la configuration au repos.
  14. Chaise, comprenant le système d'articulation (1) selon l'une quelconque des revendications précédentes, un siège (6) rigidement couplé audit support de siège et un dossier (7) rigidement couplé audit support de dossier.
EP18728756.0A 2017-03-22 2018-02-26 Système d'articulation pour chaises Active EP3599938B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000031737A IT201700031737A1 (it) 2017-03-22 2017-03-22 Sistema di articolazione per sedie
PCT/IT2018/050029 WO2018173084A1 (fr) 2017-03-22 2018-02-26 Système d'articulation pour chaises

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EP3599938A1 EP3599938A1 (fr) 2020-02-05
EP3599938B1 true EP3599938B1 (fr) 2023-07-19
EP3599938C0 EP3599938C0 (fr) 2023-07-19

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CN (1) CN110366379B (fr)
IT (1) IT201700031737A1 (fr)
WO (1) WO2018173084A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208648C1 (fr) * 1992-03-18 1993-05-27 Roeder Gmbh Sitzmoebelwerke, 6000 Frankfurt, De

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
US2859799A (en) * 1956-05-03 1958-11-11 Edwin R Moore Functional posture controller for chairs
US2903046A (en) * 1956-10-01 1959-09-08 Cali Quilt Furniture Corp Variable pitch tilting seat and backrest mounting
GB2110294A (en) * 1981-11-27 1983-06-15 Uop Inc Locking vehicle seat backs
DE3619928A1 (de) * 1986-06-13 1987-12-17 Hartmut S Engel Funktions-sitzmoebel
DE102005029906B3 (de) * 2005-06-26 2007-01-11 Bock 1 Gmbh & Co. Kg Synchronmechanik
JP5043385B2 (ja) * 2006-08-24 2012-10-10 マツダ株式会社 自動車用シート装置
WO2010097818A1 (fr) * 2009-02-25 2010-09-02 Donati S.P.A. Dispositif pour synchroniser l'inclinaison d'un dossier de siège et d'un siège

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208648C1 (fr) * 1992-03-18 1993-05-27 Roeder Gmbh Sitzmoebelwerke, 6000 Frankfurt, De

Also Published As

Publication number Publication date
EP3599938A1 (fr) 2020-02-05
IT201700031737A1 (it) 2018-09-22
CN110366379A (zh) 2019-10-22
EP3599938C0 (fr) 2023-07-19
CN110366379B (zh) 2023-06-23
WO2018173084A1 (fr) 2018-09-27

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