WO2019082219A1 - Système d'articulation pour chaises - Google Patents

Système d'articulation pour chaises

Info

Publication number
WO2019082219A1
WO2019082219A1 PCT/IT2018/050197 IT2018050197W WO2019082219A1 WO 2019082219 A1 WO2019082219 A1 WO 2019082219A1 IT 2018050197 W IT2018050197 W IT 2018050197W WO 2019082219 A1 WO2019082219 A1 WO 2019082219A1
Authority
WO
WIPO (PCT)
Prior art keywords
hinge point
equal
articulation
frame
configuration
Prior art date
Application number
PCT/IT2018/050197
Other languages
English (en)
Inventor
Paolo Salvoni
Mauro BRAIS
Original Assignee
Co.Fe.Mo. Industrie S.R.L.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Co.Fe.Mo. Industrie S.R.L. filed Critical Co.Fe.Mo. Industrie S.R.L.
Priority to EP18797172.6A priority Critical patent/EP3700392A1/fr
Publication of WO2019082219A1 publication Critical patent/WO2019082219A1/fr

Links

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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs

Definitions

  • the 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 ground resting base, a seat support and a backrest support of the chair.
  • the seat support and the backrest support 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 When one of the two supports moves under an user's action (typically exerted on the backrest), the system opposes itself with an elastic reaction which tends to return both supports in the at-rest configuration (i.e. without actions).
  • This reaction is typically obtained by means of an elastic element, for example at least one spring.
  • the reaction of the system to a given oscillation is adjustable, for example thanks to a user- actuatable adjustment system to vary the preload degree of the elastic element or the position of at least one anchoring point of the elastic element to the frame and/or to one of the two supports.
  • the reaction of the system to a given oscillation is more intense the heavier is the user (in the jargon this effect is called 'weighing-people'), regardless of the presence or not of an adjustment of the reaction of the elastic element.
  • WO 2009/153811 A1 describes an adjustment device for chairs comprising a main body; a seat support and a backrest support mounted on the main body; and articulation means for movably engaging the backrest support and the seat support to the main body, the articulation means comprising a lever rotating with respect to the main body and hinged to the seat support and to the backrest support, to obtain a determined relationship of movement between the backrest support and the seat support.
  • WO 2010/097818 A1 describes a device for synchronizing the inclination of the backrest and of the seat of a chair, of the type comprising a first crank integral with the frame of the backrest and hinged to the rear part 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 found that the known articulation systems for chairs have some drawbacks and/or can be improved in some aspects.
  • the Applicant has observed that in the articulation systems of WO 2009/153811 A1 and WO 2010/097818 A1 , the front hinge point of the seat travels along an arc of a circle with centre facing the back of the system, and this implies that, given a certain relationship between vertical component and horizontal component of the translational motion of the front part of the seat in the initial stretch of the movement (close to the at-rest configuration), said relationship changes during the movement progressively becoming unbalanced towards the horizontal component at the expense of the vertical one.
  • the raising rate of the front of the seat per oscillation unit of the backrest is progressively lower as the degree of oscillation of the backrest increases with respect to the at-rest position. This means that the effect of the user's weight on the seat, which tends to oppose to the inclination ('weighing-people'), tends to decrease as the backrest oscillates, until it is cancelled and potentially changes sign for greater oscillations.
  • this behaviour determines a response to the oscillation perceived by the user that is not always optimal along the whole oscillation range, and/or it determines limitations in the amplitude of oscillation 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, the system comprising: - a (rigid) frame to be associated with a base of the chair;
  • the articulation system further comprises a (rigid) rod hinged to a front portion of said frame in a first hinge point and to a front portion of the seat support in a second hinge point,
  • said articulation element and said rod are structured so that said articulation system assumes an at-rest configuration in the absence of oscillation forces acting on the seat support and/or on the backrest support, and a maximum oscillation configuration in which said seat support is roto-translated with respect to the at-rest configuration
  • the present invention relates to a chair comprising the articulation system according to the present invention.
  • the chair preferably comprises a seat for a user rigidly coupled to said seat support and/or a backrest rigidly coupled to said backrest support.
  • vertical, horizontal, upper, lower and the like refer to a condition of normal use of a chair embodying the articulation system of the present invention.
  • 'superior' refers to a higher vertical heigt, etc.
  • front, rear, backward, advanced and the like 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.
  • 'anteriorly' refers to a more advanced position towards the front end, regardless of the specific vertical height.
  • Geometric elements such as angles, relative positions, etc. refer to a reference plane perpendicular to said axis of rotation.
  • the synchronized articulation systems between backrest and seat of WO 2009/153811 A1 and WO 2010/097818 A1 in which the rear articulation element and the front rod rotate in the same direction and in the at-rest configuration the hinge point between rod and seat is at the front and at the top of the hinge point between rod and frame, cause that, during the oscillation, the hinge point of the seat is forced to travel, on the reference plane, a trajectory shaped as an arc of a circle with a concavity facing the axis of rotation of the rear articulation element.
  • This movement of the front hinge point can generate an upper dead point of the trajectory of the hinge point, in which the latter moves almost horizontally, and/or the above explained dynamics of variation of the relationship between vertical and horizontal component of the translational motion of the front part of the seat.
  • the present solution thanks to the rotation in the opposite direction of the two articulation elements, allows the generation of movement dynamics of backrest and/or seat that cannot be achieved with the rotation in the same direction, and capable of providing improved ergonomic properties to the chair, as it will be better clarified from the following.
  • the present invention in one or more of the aforesaid aspects may have one or more of the following preferred features, some of which refer to the aforesaid reference plane.
  • said second hinge point is in a lower (and more preferably rear or vertical) position with respect to the first hinge point.
  • the second hinge point is in a position higher than the position of the second hinge point in the at-rest configuration (more preferably posteriorly to the first hinge point, even more preferably below the first hinge point).
  • the aforesaid positioning of the rod allows that during the oscillation the front hinge point of the seat travels, on the reference plane, a trajectory shaped as an arc of a circle with concavity turned upwardly (and preferably anteriorly) with respect to the hinge point.
  • the present solution achieves a relationship between the horizontal and vertical motion components which evolves in an opposite manner with respect to the evolution obtained in the known case of a lever articulation in which the arc of a circle has the concavity turned rearwards.
  • the raising rate increases with increasing rotation of the articulation element, throughout the whole range of the rotation of the latter. The magnitude of raising depends on the specific design of the rod.
  • the aforesaid trajectory shaped as an arc of a circle gives to the system the 'weighing people' effect described above.
  • the support in use, is subject to the weight force of the user, which generates a substantially vertical weight force acting on the front hinge point.
  • This weight force can be instantaneously decomposed into a component tangential to the aforesaid arc of a circle at the hinge point and into a radial component (directed like the aforesaid joining line and which is cancelled by the constraining reaction of the rod).
  • the tangential component of the weight force tends to push down the support in opposition to the oscillation motion and this component must be overcome to set and maintain the oscillation. Therefore, as the weight of the user varies, the reaction of the system to an oscillation is more intense the heavier is the user, even in the absence of adjustments of the reaction of the elastic element.
  • the oscillation force When the seat support is acted in roto-translation (for example by acting an oscillation force on the backrest which is articulated to the seat), the oscillation force generates an action force on the rod-support hinge point which induces the rotation of the rod and therefore the roto-translation of the seat.
  • the action force can be decomposed into its two components: the one tangential to the aforesaid arc of a circle at the hinge point and the radial one.
  • the radial component is cancelled by the constraining reaction of the rod, while the tangential component is the one which produces the rotational torque of the rod.
  • the 'active' component of the weight force i.e. the tangential one
  • the active component of the action force decreases at the expense of the radial one.
  • the Applicant considers that the front articulation by rigid rod between the seat support and the backrest support is preferable to alternative coupling systems, such as for example those with a pin sliding along a slot, since the latter involves the generation of a sliding friction (static and dynamic) between the mutual sliding surfaces of pin and slot.
  • This friction having an application point in the instantaneous contact point, is difficult to control in magnitude, thus creating problems in the predictability and/or reliability of the oscillation movement.
  • an angle formed between a line joining said first and second hinge point and a horizontal straight line, said angle being above the horizontal line and in front of the joining line, has a first value greater than or equal to 10° and less than or equal to 90° and in said maximum oscillation configuration said angle has a second value less than the first value and greater than or equal to 0°.
  • Preferably said first value is greater than or equal to 20°, more preferably greater than or equal to 30°, even more preferably greater than or equal to 40°. In this way, the weighing-people effect in the at-rest configuration is limited.
  • said first value is less than or equal to 80°, more preferably less than or equal to 70°. In this way it is possible to obtain a sensitive weighing-people effect described above even close to the at-rest configuration.
  • said second value is less than or equal to 40°, more preferably less than or equal to 30°. In this way a high weighing-people effect can be achieved near the maximum oscillation configuration as well as a high vertical component of the seat motion.
  • a difference between said first and second value of the angle is greater than or equal to 10°, more preferably greater than or equal to 20°, even more preferably greater than or equal to 30°. In this way it can be obtained good dynamics of the above described effect of progressive stiffening and/or of evolution of the relationship between horizontal and vertical components of the seat motion.
  • a distance between said first and second hinge point is greater than or equal to 10 mm, more preferably greater than or equal to 15 mm, and/or less than or equal to 100 mm, more preferably less than or equal to 90 mm.
  • a distance between said rear hinge point and said axis of rotation is greater than or equal to 20 mm, more preferably greater than or equal to 30 mm, and/or less than or equal to 150 mm, more preferably less than or equal to 100 mm.
  • a distance between said first hinge point and said axis of rotation is greater than or equal to 80 mm, more preferably greater than or equal to 90 mm, and/or less than or equal to 200 mm, more preferably less than or equal to 150 mm.
  • said first hinge point is above the axis of rotation, more preferably below the rear hinge point at least in the maximum oscillation configuration.
  • the first hinge point and the rear hinge point differ by less than 10 mm in height.
  • the second hinge point is above the axis of rotation, and more preferably below the rear hinge point.
  • the Applicant has verified that the aforesaid dimensional values and/or the aforesaid relative positions give optimal ergonomic performances.
  • said seat support is directly hinged to said articulation element.
  • said system is structurally simple and rational.
  • the rear hinge point is above said axis of rotation.
  • the rear hinge point in said at-rest configuration and/or and in said maximum oscillation configuration the rear hinge point is in front of the axis of rotation. In this way, since also the rear portion of the support tends to rise during the oscillation, there is a "weighing-people" effect even at the rear hinge point.
  • This solution is particularly advantageous in the absence of a system for adjusting the reaction of the elastic element for a given oscillation of the supports.
  • the rear hinge point in said at-rest configuration and/or in said maximum oscillation configuration, is rearwardly with respect to the axis of rotation. In this way it is limited the raising of the legs (and in general the raising of the whole seat), since the rear portion of the support tends to lower during the oscillation.
  • This solution is particularly advantageous in combination with a system for adjusting the reaction of the elastic element for a given oscillation of the supports, which provides for the limited 'weighing-people' effect.
  • the backrest support is rigidly constrained to said articulation element.
  • the articulation element may be a whole with said backrest support, or the backrest support can be rigidly fixed to the articulation element. In this way the whole system is structurally simple, reliable and economical in its production.
  • the backrest support 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 can comprise a further articulation element, rigid and hinged to said frame to rotate about a further axis of rotation, wherein said backrest support is hinged to said articulation element at a part of the articulation element opposite to said rear hinge point of the seat support 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 seat support and/or between said frame and said backrest support.
  • said elastic element is configured to work in extension.
  • said elastic element exerts a residual elastic returning force between support and frame ('preload').
  • said elastic element has a first end (directly) abutting against the frame and a second end (directly) abutting against the rear hinge point and/or against the seat support.
  • the first end of the elastic element is directly abutting against a pin integral with said frame and placed in a front-low portion of the frame.
  • the second end of the elastic element is directly abutting against a hinge pin defining said rear hinge point.
  • the chair comprises a floor resting base and a stem mounted on the floor resting base, said frame being rigidly mounted on an upper end of said stem.
  • FIG. 1 and 2 show a schematic side view of a system according to the present invention respectively in an at-rest and maximum oscillation configuration, with some parts in transparency;
  • FIG. 1 The figures show in side view an articulation system 1 for chairs according to the present invention.
  • the opposite side of the system 1 not visible, symmetrically comprises some elements shown and described here, as better specified.
  • the articulation system 1 comprises a rigid frame 2, which is for example to be rigidly mounted on an upper end of a stem 3 mounted on a floor resting base (not shown) of a chair.
  • the articulation system 1 further comprises a rigid seat support 4, and a backrest support 5, rigid and distinct from the seat support, both mounted on the frame in an articulated manner.
  • the seat support consists of two separate and specularly identical parts, one on each side of the system, of which only one is visible in the figures.
  • the chair typically comprises a seat 6 rigidly coupled to the seat support 4 and a backrest 7 rigidly coupled to the backrest support 5.
  • the stem, the seat and the backrest are schematically shown 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 backrest support 5 is a whole (i.e. a single piece) with the articulation element 14 (or better with the two articulation elements, one on each side).
  • the backrest support can be distinguished from the articulation element, but rigidly fixed to the latter. In both cases, during the oscillation, the backrest simply rotates about the axis of rotation 15, for example with a maximum oscillation amplitude of 18°.
  • the backrest support is connected to the articulation element in an articulated manner, similarly to the articulation of the backrest support with respect to the frame and to the seat support described in the aforesaid document WO 2009/153811 A1 , to which reference is made for details.
  • the seat support 4 is directly hinged to the articulation element in a rear hinge point 16.
  • the hinge can be made with a single pin passing through the whole system, or a pair of pins, one on each side, each pin being integral with the seat support 4 and the articulation element 14.
  • the articulation system 1 comprises at least one elastic element 20 (only schematically shown), for example a spring, operatively interposed between the frame 2 and the seat support 4, to oppose itself to the roto-translation of the seat with respect to the at-rest configuration, the greater the more pronounced is the roto-translation.
  • a first end of the elastic element 20 is directly abutting against a fixed pin 17 integral with the frame and placed in a front portion of the frame and a second end of the elastic element is directly abutting against the hinge pin which makes the rear hinge point 16.
  • the articulation system further comprises, for each side, a rod 9 hinged to a front portion of the frame in a first hinge point 10 and to a front portion of the seat support in a second hinge point 11.
  • the articulation element 14 and the rod 9 allow the articulation system to assume an at-rest configuration (shown in figure 1), in the absence of oscillation forces acting on the seat support and/or on the backrest support (or when such oscillation forces do not exceed the possible preloading force of the elastic element
  • the seat support is roto- translated with respect to its position in the at-rest configuration and the backrest support takes the maximum possible oscillation with respect to the at-rest position.
  • the rod 9 rotates about the first hinge point 10, fixed with respect to the frame 2.
  • the seat 6 is arranged horizontally and/or the backrest 7 is substantially vertical.
  • the figures show a view of one side of the system 1 , the side being defined with respect to the kinematic axes.
  • the sides of the system there are meant the two opposite portions of the system with respect to a median plane of the system perpendicular to the kinematic axes (e.g. axes 15, 16, 10, 11 etc).
  • the articulation system is specular with respect to the median plane, possibly with the exception of some elements such as the elastic element that can only be present on one side or may have differences between the two sides. Therefore, for example, the illustrated elements are reproduced symmetrically also on the side of the system opposite to that shown.
  • the second hinge point 11 in the at-rest configuration is in a lower and more rearward position with respect to the first hinge point 10 and in the maximum oscillation configuration the second hinge point 11 is in a position higher than the position of the second hinge point 11 in the at-rest configuration (i.e. the rod 9 is rotated clockwise with reference to the side shown in the figures).
  • an angle 18 is defined as the angle formed between a line 20 joining the first and second hinge point and a horizontal line 13, the angle being above the horizontal line and in front of the joining line.
  • the angle 18 in the at-rest configuration is equal to about 60° and in the maximum oscillation configuration it is equal to 17°, with a difference between the two values equal to 43°.
  • the distance between the first and second hinge point 10, 11 is equal to about 20 mm
  • the distance between the rear hinge point 16 and the axis of rotation 15 is equal to about 36 mm
  • the distance between the first hinge point 10 and the axis of rotation 15 is equal to about 114 mm.
  • the first and second hinge point 10, 11 are below the rear hinge point 16 and above the axis of rotation 15.
  • the rear hinge point 16 is in front of and above the axis of rotation 15.
  • the seat in the transition from the at-rest configuration to that of maximum oscillation, the seat roto-translates in such a way that both the back and the front (the latter to a greater extent) are lifted and retreat (giving the 'weighing-people' effect).
  • the relative ratio between the raising and the retraction of the front varies as a function of the oscillation, wherein in the final stretch of the movement the raising 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, as in the shown example.
  • this embodiment in the at-rest and maximum oscillation configuration, the rear hinge point 16 is rearwardly with respect to, and above, the axis of rotation 15.
  • the seat in the transition from the at-rest configuration to the maximum oscillation configuration, the seat roto-translates moving rearwards so that the front remains substantially at the same height (the 'weighing-people' effect at the back is therefore negligible). Therefore, this embodiment preferably comprises a system for adjusting the reaction of the elastic element.
  • a second elastic element may be provided on the other side of the system, the second elastic element having a first end abutting against a pin movable with respect to the frame 2 (by means of an adjustment system actuatable by the user or automatically, and not shown in detail as, for example, of the known type) and a second end abutting against the pin of the rear hinge point 16.
  • the adjustment system is structured to move the first end or both ends of the elastic element with respect to the frame and/or to the backrest support, and/or to vary the elastic constant of the elastic element (for example, varying the number of active spring turns). In this way the user can adjust the 'stiffness' of the response to a given oscillation.
  • Figures 3A and 3B show schematically, and for illustrative purposes, the rod 9, respectively in the at-rest and maximum oscillation configuration.
  • Number 50 indicates the weight force and number 51 indicates the action force.
  • the ratio between the lengths of the weight force and the action force is totally arbitrary, for illustrative purposes only.
  • the second hinge point 11 is assumed as the application point of these forces.
  • Numbers 50' and 51 ' indicate the respective component of the forces along the tangent to the arc of circle 30 of the trajectory of the second hinge point 11 and numbers 50" and 51 " indicate the respective component of the forces along the radial direction.
  • the radial components 50" and 51 " are cancelled by the constraining reaction (not shown) of the rod 9.
  • Figures 3A and 3B show how the 'active' components of the forces 50' and 51 ' follow, during the oscillation, the dynamics described above, producing a progressive stiffening of the response of the articulation system.
  • the front rod 9 can be replaced by a rotating element mounted on the frame with an axis of rotation parallel to the axis of rotation 15 (for example a bearing mounted on a side wall of the frame) and coupled to the seat support in eccentric position with respect to the axis of rotation of the rotating element, to make the aforesaid second hinge point (for example a pin integral with one among the rotating element and the seat support engages a respective hole or slot afforded in the other among the seat support and the rotating element, wherein the pin or the slot on the rotating element is in eccentric position).
  • a rotating element mounted on the frame with an axis of rotation parallel to the axis of rotation 15 for example a bearing mounted on a side wall of the frame
  • the seat support in eccentric position with respect to the axis of rotation of the rotating element
  • rods 9, shown externally to the seat support can be interposed between the frame and the seat support or even inside the frame.
  • the present invention also contemplates solutions, not shown, wherein in the at-rest configuration the second hinge point is in an upper (and preferably front) position with respect to the first hinge point and the rear hinge point is below (and preferably rearwardly with respect to) the axis of rotation.

Abstract

L'invention concerne un système d'articulation (1) pour chaises, comprenant un support de siège (4) monté sur un cadre (2), un élément d'articulation (14) articulé sur le cadre de manière à tourner autour d'un axe de rotation (15), le support de siège étant articulé sur l'élément d'articulation au niveau d'un point d'articulation arrière (16), un support de dossier (5) accouplé à l'élément d'articulation (14), une tige (9) articulée antérieurement sur le cadre au niveau d'un premier point d'articulation (10) et sur le support de siège au niveau d'un second point d'articulation (11). Pendant la transition de la configuration de repos à la configuration d'oscillation maximale, et vice versa, l'élément d'articulation (14) et la tige (9) tournent dans des directions opposées.
PCT/IT2018/050197 2017-10-25 2018-10-15 Système d'articulation pour chaises WO2019082219A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18797172.6A EP3700392A1 (fr) 2017-10-25 2018-10-15 Système d'articulation pour chaises

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000121480 2017-10-25
IT102017000121480A IT201700121480A1 (it) 2017-10-25 2017-10-25 Sistema di articolazione per sedie

Publications (1)

Publication Number Publication Date
WO2019082219A1 true WO2019082219A1 (fr) 2019-05-02

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Application Number Title Priority Date Filing Date
PCT/IT2018/050197 WO2019082219A1 (fr) 2017-10-25 2018-10-15 Système d'articulation pour chaises

Country Status (3)

Country Link
EP (1) EP3700392A1 (fr)
IT (1) IT201700121480A1 (fr)
WO (1) WO2019082219A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200007559A1 (it) * 2022-04-14 2023-10-14 Compotek S R L Unipersonale Meccanismo per la regolazione sincrona dell’altezza della seduta e dell’inclinazione dello schienale di una sedia

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110127820A1 (en) * 2008-06-17 2011-06-02 Co.Fe.Mo. Industrie S.R.L. Adjustment device for chairs
WO2012048863A1 (fr) * 2010-10-15 2012-04-19 Bock 1 Gmbh & Co. Kg Mécanisme synchrone

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110127820A1 (en) * 2008-06-17 2011-06-02 Co.Fe.Mo. Industrie S.R.L. Adjustment device for chairs
WO2012048863A1 (fr) * 2010-10-15 2012-04-19 Bock 1 Gmbh & Co. Kg Mécanisme synchrone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200007559A1 (it) * 2022-04-14 2023-10-14 Compotek S R L Unipersonale Meccanismo per la regolazione sincrona dell’altezza della seduta e dell’inclinazione dello schienale di una sedia
EP4260761A1 (fr) * 2022-04-14 2023-10-18 Compotek S.r.l. Unipersonale Mécanisme de réglage synchrone de la hauteur de l'assise et de l'inclinaison du dossier d'une chaise

Also Published As

Publication number Publication date
EP3700392A1 (fr) 2020-09-02
IT201700121480A1 (it) 2019-04-25

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