EP3965618B1 - Dispositif de réglage pour chaise à mécanisme à bascule - Google Patents

Dispositif de réglage pour chaise à mécanisme à bascule Download PDF

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Publication number
EP3965618B1
EP3965618B1 EP20711960.3A EP20711960A EP3965618B1 EP 3965618 B1 EP3965618 B1 EP 3965618B1 EP 20711960 A EP20711960 A EP 20711960A EP 3965618 B1 EP3965618 B1 EP 3965618B1
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EP
European Patent Office
Prior art keywords
plate
lever
rocking
seat
spring
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP20711960.3A
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German (de)
English (en)
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EP3965618A1 (fr
Inventor
Stefano Serena
Marco DALL'ACQUA
Simone DE ROSSI
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.)
BRADO SpA
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Brado SpA
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Publication of EP3965618A1 publication Critical patent/EP3965618A1/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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/0255—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame pivotally mounted in the base frame, e.g. swings
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/03—Locking members

Definitions

  • the present invention relates to an adjustment device for a chair that has a rocking mechanism.
  • rocking mechanisms are structurally complex and require a certain force of the user in order to activate the packing of the slats, which may also be subject to possible seizing.
  • EP 2554075B1 is also known, which relates to a chair with a rocking mechanism
  • the aim of the present invention is to solve the above mentioned technical problems, eliminating the drawbacks in the cited known art, by providing an adjustment device for a chair that makes it possible to achieve at the same time, rapidly, simply and optimally, both the activation and prevention of rocking for a chair, and also the activation of the raising of said chair.
  • an object of the invention is to provide an adjustment device for a chair that, in addition to the foregoing characteristics, also makes it possible to preserve the structural integrity of the various components even upon the accidental activation/deactivation, using a lever, of the rocking by the user.
  • Another object of the invention is to provide an adjustment device that can be activated in order to activate the rocking, block the rocking, and adjust the height of the chair all using a single lever.
  • Another object of the invention is to provide an adjustment device that, in addition to the foregoing characteristics, also enables the user to automatically determine the condition of activation/deactivation of the rocking after the actuation of the lever even in the presence of a load applied to the chair while at the same time preserving the internal components from accidental breakage.
  • Another object of the invention is to provide an adjustment device that is structurally simple and free from sticking.
  • Another object of the invention is to provide an adjustment device that is of low cost and which can be made with the usual conventional systems.
  • the reference numeral 1 generally designates an adjustment device for a chair (not shown) which comprises a rocking mechanism composed of a first plate 2, which has a substantially C-shaped box-like shape so as to define a base 3 and two first lateral wings 4a, 4b; in the inner part of the base 3 there is a protruding bushing 5 at which the end of the stem 6 of a central gas-operated post 7, mounted on a footing and used for the height adjustment of a seat (not shown), is associated.
  • a second plate 10 which can be fixed to a seat (not shown), is articulated to the first plate 2 so that it can rock, by virtue of a first pivot 8a and a screw 8b which lie on a first axis 9 which is transverse and eccentric with respect to the first plate 2.
  • the plate 10 is preferably made of plastic material, in this way it being possible to modify its shape and color for customization.
  • the first plate 2 interacts with means adapted to contrast the rocking of the seat, such means being constituted by a pair of first springs 11a, 11b which protrude inside the base 3 and are interposed between the latter and the second plate 10.
  • a lever 13 Preferably at the lateral wing 4a there is an opening 12 at which a lever 13 can be positioned.
  • An element for protecting the fingers of the user such as a bushing made of elastically deformable plastic material 150, can advantageously be inserted into such opening 12, coaxially to the lever 13.
  • the lever 13 is also preferably made of plastic material, in this way it being possible to modify its shape and color for customization.
  • the opening 12 has dimensions that are such as to allow the lever 13 to perform movements both on a first plane 100, which is perpendicular to the base 3 of the plate 2, and on a second plane 200, which is substantially parallel to the plane of the base 3.
  • the lever 13 has a first portion 14, which is external to the plate 2, and a second portion 15, which is internal to the plate.
  • the lever 13 when inactive lies on a different axis with respect to the first axis 9.
  • the second portion 15 has, adjacent to the opening 12, a cylindrical insert 16 which acts as a seat for a second pivot 17 for pivoting the lever 13 to the first plate 2; the second pivot 17 has a first stem 18 which can be positioned in a fixed manner at an adapted first seat 19a which is provided inside the base 3 of the first plate 2, and so that it can rock within a second seat 19b which is shaped substantially like an opposing double truncated cone.
  • a movement of the lever 13 on the first plane 100, which is perpendicular to the first plate 2, corresponds to a rocking of the second portion 15 of the lever 13 with respect to the second pivot 17 for pivoting.
  • the second portion 15 has a radial tab 20, facing in the direction of the lateral wing 4b, which is such as to be positioned above the central gas-operated post 7 so as to be able to activate it upon a movement that can be imparted to the first portion 14 of the lever 13 on the first plane 100 substantially at right angles to the base 3 and in the opposite direction with respect to the base 3.
  • This movement makes it possible to perform the height adjustment of the seat.
  • the device 1 comprises means adapted to prevent the rocking of the second plate 10 with respect to the first plate 2, the means being constituted by a mechanism 23 which is arranged slideably and inside the first plate 2 in a direction radial to the gas-operated post 7 and being directed toward the first springs 11a, 11b.
  • the mechanism 23 comprises a second stem 29, rectangular in plan view, which is arranged in the interspace between the first springs 11a, 11b.
  • the second stem 29, which slides between the pair of first springs 11a, 11b, is connected to a first head 32, which is rectangular in plan view and the second wings 33a, 33b of which protrude laterally and transversely to the second stem 29.
  • the mechanism 23 can assume two different positions: a first, retracted position which is retracted in the direction of the gas-operated post 7, shown in Figure 6 , in which an empty space 38 is formed between the second wings 33a, 33b of the first head 32 and the end wall 39 of the first cavity 28, which constitutes a temporary seat for a tooth 40 which protrudes internally and downward with respect to the second plate 10.
  • the mechanism 23 can also assume a second, advanced position which is advanced in the direction of the end wall 39, shown in Figure 12 .
  • a guide for the sliding of the second stem 29 and the first head 32 is provided by the presence of a longitudinal ridge 41 which protrudes from the bottom of the first cavity 28 and is accommodated inside a complementarily-shaped third seat 42 which is provided below the second stem 29 and optionally also below the first head 32.
  • the first head 32 of the mechanism 23 occupies the empty space 38 between its terminal end and the end wall 39 of the first cavity 28 and acts as an abutment for the overlying tooth 40 which protrudes internally and downward with respect to the second plate 10.
  • the device comprises first means for elastic interconnection between the lever 13 and the first head 32, such first means being constituted by a second spring 60, which is a leaf spring with a first end 61a shaped like an eyelet which is associated, so as to rotate integrally therewith, inside an approximately complementarily-shaped third seat 62a which is provided in an annular fashion and inside the second portion 15 of the lever 13 concentrically to the second pivot 17.
  • first means being constituted by a second spring 60, which is a leaf spring with a first end 61a shaped like an eyelet which is associated, so as to rotate integrally therewith, inside an approximately complementarily-shaped third seat 62a which is provided in an annular fashion and inside the second portion 15 of the lever 13 concentrically to the second pivot 17.
  • the second spring 60 has a second, free end 61b, which is directed toward the second stem 29 and which acts slideably inside an adapted fourth seat 63 which is provided proximate to the terminal end 64 of the second stem 29.
  • the device further comprises second means for temporarily locking the rotation of the lever 13 in two distinct positions, which are the positions indicated previously in order to allow or prevent the rocking of the second plate 10 with respect to the first plate 2.
  • Such second means are constituted by an elastically deformable slider which is constituted, in the specific embodiment, by a piston 65, which advantageously has a second head 66, approximately hemispherical, which can slide axially, in contrast with a third spring 67, helical, within an adapted fifth seat 68 which is provided axially with respect to a projection 69 which protrudes radially from the second portion 15 of the lever 13 in the opposite direction with respect to the end wall 39 and on a plane that is preferably substantially lower than the plane of arrangement of the cylindrical insert 16.
  • the second head 66 can act, stably but temporarily, in two distinct and adjacent positions which correspond to a sixth seat 70 and to a seventh seat 71, which are substantially shaped complementarily thereto and are provided at an adjacent wall 72 which is present inside the first plate 2.
  • the second spring and the third spring 60, 67 are actuated by the same lever 13 and they are dimensioned so that the third spring 67 keeps the piston 65 firmly positioned despite the loading of the second spring 60.
  • the third spring 67 has an elastic constant that exceeds that of the second spring 60 so that the piston 65 firmly locks the lever 13 in position when it acts either in the sixth seat 70 or in the seventh seat 71.
  • an adjustment device for a chair that has a rocking mechanism having been obtained that makes it possible to achieve at the same time, rapidly, simply and optimally, both the activation and prevention of rocking for a chair, and also the activation of the raising of that chair, the device making it possible at the same time to achieve the activation and the blocking of the rocking by way of a single lever that makes it possible to preset both the activation and the blocking of the rocking with a load applied, while at the same time preserving the internal components from accidental breakage.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (12)

  1. Dispositif de réglage (1) pour une chaise, qui comprend un mécanisme oscillant composé d'une première plaque (2) qui est fixée sur une colonne centrale à gaz (7) pour un réglage en hauteur d'un siège et par rapport à laquelle une seconde plaque (10) est articulée, autour d'un premier axe (9) qui est transversal à cette dernière et de sorte qu'elle peut osciller, ladite seconde plaque étant fixée à un siège et interagissant avec des moyens (8a, 8b) qui sont adaptés pour contraster une oscillation d'un dossier, un levier (13) étant articulé latéralement par rapport à ladite première plaque (2), à un axe qui est différent dudit premier axe (9), dans lequel le dispositif de réglage (1) est prévu avec des premiers moyens pour l'interconnexion élastique entre ledit levier (13) et une première tête (32) qui est adaptée pour bloquer/débloquer une oscillation entre ladite première plaque et ladite seconde plaque (2, 10) et des seconds moyens pour verrouiller, de manière temporaire, une rotation dudit levier (13) dans deux positions distinctes, lesdits seconds moyens pré-changeant lesdits premiers moyens afin de bloquer/débloquer ladite oscillation en présence d'une charge appliquée sur ledit siège, caractérisé en ce qu'une paire de premiers ressorts (11a, 11b) est associée à ladite première plaque (2), qui a une forme de boîte sensiblement en forme de C afin de définir une base (3) et deux premières ailes latérales (4a, 4b), ladite paire de premiers ressorts étant adaptée pour contraster l'oscillation dudit siège, au niveau de l'une desdites ailes latérales (4a, 4b), on trouve une ouverture (12) sur laquelle ledit levier (13) peut être positionné, ladite ouverture (12) ayant des dimensions qui sont telles qu'elles permettent audit levier (13) de réaliser des mouvements à la fois sur un premier plan (100) qui est perpendiculaire à ladite base (3) de ladite première plaque (2), et sur un second plan (200), qui est sensiblement parallèle au plan de la base (3), ledit levier (13) ayant une première partie (14) qui est à l'extérieur de ladite première plaque (2) et une seconde partie (15) qui est à l'intérieur de ladite première plaque, dans lequel ladite seconde plaque (15) a, de manière adjacente à ladite ouverture (12), un insert cylindrique (16) qui loge un second pivot (17) pour faire pivoter ledit levier (13) par rapport à ladite première plaque (2), ledit second pivot (17) ayant une première tige (18) qui peut être agencée d'une manière fixe sur un premier siège (19a) adapté et de forme complémentaire qui est prévu à l'intérieur de ladite base (3) de ladite première plaque (2) et de sorte qu'il peut osciller dans un deuxième siège (19b) qui est sensiblement formé comme un double cône tronqué opposé, un mouvement dudit levier (13) le long dudit premier plan (100) qui est perpendiculaire à ladite première plaque (2) correspondant à une oscillation de ladite seconde partie (15) dudit levier (13) par rapport audit second pivot (17) pour pivoter.
  2. Dispositif selon la revendication 1, caractérisé en ce que ladite seconde partie (15) a une languette radiale (20), dirigée vers ladite aile latérale (4b) qui est telle qu'elle est agencée au-dessus de ladite colonne centrale à gaz (7).
  3. Dispositif selon les revendications 1 ou 2, caractérisé en ce que lesdits moyens adaptés pour empêcher l'oscillation de ladite seconde plaque (10) par rapport à ladite première plaque (2) sont constitués par un mécanisme (23) qui est agencé de manière coulissante et à l'intérieur de ladite première plaque (2) dans une direction radiale par rapport à ladite colonne centrale à gaz (7) et est dirigé vers lesdits premiers ressorts (11a, 11b), ledit mécanisme (23), qui est sensiblement en forme de T sur une vue en plan, étant logé dans une première cavité (28) adaptée qui est prévue dans la zone de ladite première plaque (2) où lesdits premiers ressorts (11a, 11b) sont également agencés, ledit mécanisme (23) comprenant une seconde tige (29), rectangulaire sur une vue en plan, qui est agencée dans l'espace intermédiaire entre lesdits premiers ressorts (11a, 11b), ladite seconde tige (29), qui coulisse entre ladite paire de premiers ressorts (11a, 11b), étant raccordée à une première tête (32), qui est rectangulaire sur une vue en plan, et dont les secondes ailes (33a, 33b) font saillie latéralement et transversalement par rapport à ladite seconde tige (29).
  4. Dispositif selon la revendication 3, caractérisé en ce que ledit mécanisme (23) adopte une première position rétractée, qui est rétractée dans la direction de ladite colonne centrale à gaz (7), dans laquelle un espace vide (38) est formé entre lesdites secondes ailes (33a, 33b) de ladite première tête (32) et la paroi d'extrémité (39) de ladite première cavité (28) et constitue un siège temporaire pour une dent (40) qui fait saillie à l'intérieur et au-dessous de ladite seconde plaque (10), dans cette condition, ladite seconde plaque (10) oscillant par rapport à ladite première plaque (2).
  5. Dispositif selon les revendications 3 ou 4, caractérisé en ce que ledit mécanisme (23) adopte une seconde position avancée qui est approximativement adjacente à ladite paroi d'extrémité (39), dans cette condition, ladite première tête (32) occupant ledit espace vide (38) entre son extrémité terminale et ladite paroi d'extrémité (39) de ladite première cavité (28) et ladite dent sus-jacente (40) venant en butée contre cette dernière et faisant saillie à l'intérieur et au-dessous de ladite seconde plaque (10) afin d'empêcher ladite seconde plaque (10) d'osciller par rapport à ladite première plaque (2).
  6. Dispositif selon une ou plusieurs des revendications 3 à 5, caractérisé en ce que lesdits premiers moyens pour l'interconnexion élastique entre ledit levier (13) et ladite première tête (32) sont constitués par un deuxième ressort (60), qui est un ressort à lames avec une première extrémité (61a) formée comme un oeillet qui est associé, afin de tourner de manière solidaire avec ce dernier, à l'intérieur d'un troisième siège (62a) approximativement de forme complémentaire qui est prévu d'une manière annulaire et à l'intérieur de ladite seconde partie (15) dudit levier (13) de manière concentrique par rapport à un second pivot (17), ledit deuxième ressort (60) ayant une seconde extrémité libre (61b) qui est dirigée vers ladite seconde tige (29) et qui agit, de manière coulissante, à l'intérieur d'un quatrième siège (63) qui est prévu à proximité de l'extrémité terminale (64) de ladite seconde tige (29).
  7. Dispositif selon la revendication 6, caractérisé en ce que, suite à une rotation dans le sens inverse des aiguilles d'une montre dudit levier (13), ledit levier agit sur ledit deuxième ressort (60) qui agit sur ladite seconde tige (29), qui force, à son tour, le mouvement dudit mécanisme (23) et de ladite première tête (32) dans la direction de ladite paroi d'extrémité (39) de ladite première cavité (28) jusqu'à ce que ladite dent (40) qui fait saillie à l'intérieur et au-dessous de ladite seconde plaque (10), vienne en butée contre ladite première tête (32), empêchant ainsi ladite seconde plaque (10) d'osciller par rapport à ladite première plaque (2).
  8. Dispositif selon les revendications 6 ou 7, caractérisé en ce que suite à une rotation dans le sens inverse des aiguilles d'une montre dudit levier (13), au moyen dudit deuxième ressort (60), une force est communiquée à ladite seconde tige (29) qui entraîne le mouvement dudit mécanisme (23) de ladite première tête (32) dans la direction opposée par rapport à ladite paroi d'extrémité (39) afin de dégager ladite dent (40) de ladite première tête (32), permettant son oscillation.
  9. Dispositif selon une ou plusieurs des revendications 1 à 8, caractérisé en ce que lesdits seconds moyens pour verrouiller temporairement la rotation dudit levier (13) dans deux positions distinctes afin de permettre ou d'empêcher l'oscillation de ladite seconde plaque (10) par rapport à ladite première plaque (2) sont constitués par une glissière élastiquement déformable qui est constituée par un piston (65) qui a une seconde tête (66) sensiblement hémisphérique, qui peut coulisser de manière axiale, en contraste avec un troisième ressort (67) hélicoïdal, à l'intérieur d'un cinquième siège (68) qui est prévu, de manière axiale, par rapport à une saillie (69) qui fait saillie radialement de ladite seconde partie (15) dudit levier (13) dans la direction opposée par rapport à une paroi d'extrémité (39) et sur un plan qui est sensiblement inférieur au plan d'agencement dudit insert cylindrique (16), ladite seconde tête (66) pouvant agir, de manière stable mais temporaire, dans deux positions distinctes et adjacentes qui correspondent à un sixième siège (70) et à un septième siège (71), qui sont sensiblement de forme complémentaire et sont prévus au niveau d'une paroi (72) adjacente qui est présente à l'intérieur de ladite première plaque (2).
  10. Dispositif selon les revendications 6 et 9, caractérisé en ce que ledit deuxième ressort et ledit troisième ressort (60, 67) qui sont tous deux actionnés par ledit levier (13), sont dimensionnés de sorte que ledit troisième ressort (67) maintient un piston (65) fermement positionné malgré la charge dudit deuxième ressort (60), permettant ainsi de déterminer automatiquement la condition d'activation/désactivation de l'oscillation après l'actionnement dudit levier (13) par l'utilisateur, malgré la présence d'une charge appliquée sur ladite chaise.
  11. Dispositif selon la revendication 10, caractérisé en ce que ledit troisième ressort (67) a une constante élastique qui est supérieure à celle dudit deuxième ressort (60), de sorte que ledit piston (65) verrouille fermement ledit levier (13) en position, lorsqu'il agit dans ledit sixième siège (70) ou dans ledit septième siège (71), permettant ainsi de déterminer automatiquement la condition d'activation/désactivation de l'oscillation après l'actionnement dudit levier (13) par l'utilisateur, malgré la présence d'une charge appliquée sur ladite chaise.
  12. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'un élément pour protéger les doigts de l'utilisateur, comme un manchon réalisé avec un matériau en plastique élastiquement déformable (150), est inséré dans une ouverture (12) de manière coaxiale par rapport audit levier (13).
EP20711960.3A 2019-05-09 2020-03-23 Dispositif de réglage pour chaise à mécanisme à bascule Active EP3965618B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000006667A IT201900006667A1 (it) 2019-05-09 2019-05-09 Dispositivo di regolazione per una sedia con meccanismo oscillante
PCT/EP2020/057981 WO2020224849A1 (fr) 2019-05-09 2020-03-23 Dispositif de réglage pour chaise à mécanisme à bascule

Publications (2)

Publication Number Publication Date
EP3965618A1 EP3965618A1 (fr) 2022-03-16
EP3965618B1 true EP3965618B1 (fr) 2024-02-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20711960.3A Active EP3965618B1 (fr) 2019-05-09 2020-03-23 Dispositif de réglage pour chaise à mécanisme à bascule

Country Status (5)

Country Link
EP (1) EP3965618B1 (fr)
ES (1) ES2978891T3 (fr)
IT (1) IT201900006667A1 (fr)
PL (1) PL3965618T3 (fr)
WO (1) WO2020224849A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT245520Y1 (it) 1998-07-16 2002-03-22 Beniamino Miotto Dispositivo meccanico particolarmente per la movimentazione sincronadi sedile e schienale di una sedia.
DE102011109374A1 (de) 2011-08-04 2013-02-07 Bock 1 Gmbh & Co. Kg Stuhl mit Wippmechanik
IT201700057361A1 (it) * 2017-05-26 2018-11-26 Brado S P A Dispositivo di regolazione per una sedia con meccanismo oscillante

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IT201900006667A1 (it) 2020-11-09
WO2020224849A1 (fr) 2020-11-12
EP3965618A1 (fr) 2022-03-16
PL3965618T3 (pl) 2024-07-01
ES2978891T3 (es) 2024-09-23

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