EP4289314A1 - Système d'amortissement oscillant pour le dossier d'un meuble d'assise - Google Patents

Système d'amortissement oscillant pour le dossier d'un meuble d'assise Download PDF

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Publication number
EP4289314A1
EP4289314A1 EP23169502.4A EP23169502A EP4289314A1 EP 4289314 A1 EP4289314 A1 EP 4289314A1 EP 23169502 A EP23169502 A EP 23169502A EP 4289314 A1 EP4289314 A1 EP 4289314A1
Authority
EP
European Patent Office
Prior art keywords
backrest
item
base
damping system
base structure
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.)
Pending
Application number
EP23169502.4A
Other languages
German (de)
English (en)
Inventor
Jorge Miguélez Pariente
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.)
Miguelez SL
Original Assignee
Miguelez SL
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 Miguelez SL filed Critical Miguelez SL
Publication of EP4289314A1 publication Critical patent/EP4289314A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks
    • 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

Definitions

  • the present invention relates to an oscillating damping system for the backrest of an item of seating furniture that is applicable to an item of raised seating furniture with a footrest, an item of stool furniture, an armchair, a chair, etc.; wherein in all cases the oscillating damping system allows an independent movement of the backrest with respect to the seat, facilitating the postural change that greatly influences the ergonomics and comfort in a seated position of a user when using the item of seating furniture of the invention.
  • damping systems for backrests are known, such that in all cases they include complex mechanisms that make the final product more expensive, and said damping systems also eventually break prematurely, causing a malfunction, which in some cases it is not worth fixing the item of seating furniture.
  • the invention proposes an oscillating damping system for the backrest of an item of seating furniture, wherein said furniture initially includes a seat and a backrest.
  • the oscillating damping system comprises a spring element, a base structure attached to the seat, and a support structure attached to the backrest; wherein the support structure is coupled to the base structure by means of an articulated connection.
  • the support structure comprises a transverse shaft and an intermediate body; wherein said transverse shaft articulates in the base structure; wherein end parts of the transverse shaft are attached to armrests that form part of the backrest; and wherein the intermediate body extends in a direction perpendicular to the transverse shaft.
  • the spring element is inserted between the intermediate body and the base structure, the mechanical tension of which spring element tends to push the intermediate body with the tendency to tilt the backrest towards a resting position; wherein the opposite ends of the spring element are in contact with the intermediate body and the base structure.
  • the oscillating damping system is configured such that, in a first direction of rotation, the backrest tilts against the resistance of the spring element, and in a second direction of rotation, opposite to the first direction of rotation, the backrest tilts driven by the mechanical stress accumulated in the spring element towards the resting position.
  • the spring element comprises an elastomer cylindrical body with a coaxial opening in which an appendage attached to the base structure is fitted; wherein the opposite bases of said cylindrical body are in contact with the base structure and with the intermediate body of the support structure.
  • the base structure comprises a box configuration including a bottom, two first opposed side walls, and two second opposed side walls; wherein end regions of the first side walls include two recesses aligned in the vicinity of and parallel to one of the other two second side walls; and wherein the transverse shaft of the support structure fits and articulates in said recesses.
  • the transverse shaft includes opposite end sections curved upwards to which plates are attached that are fastened to the armrests of the backrest through fastening means.
  • the intermediate body of the support structure comprises a base and two opposing collateral wings, all of them attached to the transverse shaft that forms part of the support structure; wherein the spring element is hidden in a space delimited by the base structure, the base and the two collateral wings of the support structure.
  • the seat is joined to the base structure by means of screws that are inserted through holes located in wings attached to the base structure; wherein said screws thread into nut elements fastened to a base body that forms part of the seat.
  • the wings on which the seat is fastened are attached to edges of the first and second side walls of the base structure; wherein said base structure is hidden under said seat, as well as a portion of the support structure.
  • said wings are only attached to the edges of the two second side walls of the base structure.
  • the oscillating damping system comprises a securing device that is configured to secure the intermediate body of the support structure to the base structure, enabling the tilting mobility of said support structure due to its articulated connection.
  • the securing device comprises a threaded extension attached to the base structure and a nut that threads onto an end section of said threaded extension; wherein the intermediate body includes a groove in which the threaded extension is fitted; and wherein the intermediate body includes two opposite faces: a first face that is in contact with one of the ends of the spring element and a second face that is in contact with the nut when the backrest is in the resting position.
  • the groove in the intermediate body of the support structure is located at the base thereof, which rests on one of the ends of the spring element on one of the two opposite faces thereof, and the nut is in contact with the other paired face of said base.
  • an end part of the base that forms part of the intermediate body abuts on the lower face of the base body of the seat in the resting position due to the action of the spring element.
  • the oscillating damping system is a non-rigid system that allows the backrest to tilt backwards depending on the effort applied by the user with their back on said backrest.
  • the force exerted on the backrest by the user with their back uses a mechanism similar to the lever mechanism, where during the backward tilting of the backrest of the item of seating furniture, the intermediate body is a radial extension of the transverse pivot shaft configured to press on the elastomer spring element, which is compressed depending on the effort made by the user on the backrest. It also of note that the oscillating damping system of the invention is more sensitive to effort than traditional systems.
  • the system of the invention is a more sensitive system in the initial section of the tilting of the backrest, which facilitates the user's change in posture, progressively increasing afterwards, which gives a feeling of security.
  • Figures 1 , 2 and 3 show an item of seating furniture 1 with a backrest 1a that includes the oscillating damping system 2 of said backrest 1a; wherein the item of furniture 1 comprises a seat 1b and the backrest 1a; and wherein these two elements 1a, 1b are linked by means of the oscillating damping system 2 that includes a base structure 3 attached to the seat 1b and a tilting pivot support structure 4 that is firmly joined to the backrest 1a.
  • the support structure 4 is coupled to the base structure 3 by means of an articulated connection with the possibility of tilting a certain angular space the backrest 1a by means of rotation in both directions.
  • the backrest 1a can tilt against the resistance of an elastomer spring element 5 compressing it, when a user seated on the item of furniture pushes said backrest 1a backwards with their back; wherein said spring element 5 forms part of the tilting oscillating system 2; and wherein said spring element 5 works under compression.
  • the base structure 3 has a box configuration including a bottom 3a, two first opposed side walls 3b and two second opposed side walls 3c; wherein end regions of the first side walls 3b include two recesses 6 aligned in proximity to one of the other two second side walls 3c.
  • the support structure 4 comprises a transverse shaft 4a and an intermediate body 4b equidistant from the ends of said transverse shaft 4a, such that the transverse shaft 4a articulates in the two recesses 6 of the base structure 3 to be able to carry out the folding of the assembly of the backrest 1a.
  • the backrest 1a includes armrests 7, by means of which said backrest 1a is fastened to the support structure 4.
  • the transverse shaft 4a includes opposite end sections curved upwards to which plates 8 are attached that are fastened to the armrests 7 of the backrest 1a with the help of fastening elements (not shown in the figures) that are inserted through openings 9 of the plates 8.
  • the intermediate body 4b of the support structure 4 is fixed to the bottom 3a of the base structure 3 by means of a securing device with the possibility of rotating the backrest 1a through the articulated connection of the support structure 4, while the spring element 5 is inserted between the intermediate body 4b and said bottom 3a, the tension of which spring element tends to push the intermediate body 4b upwards and with the tendency to tilt the backrest 1a in the second direction of rotation towards the resting position thereof.
  • Said securing device comprises a threaded extension 10 attached to the bottom 3a of the base structure 3 and a nut 11 that threads onto an end section of said threaded extension 10; wherein the intermediate body 4b includes a groove 12 in which the threaded extension 10 is fitted with clearance; and wherein the intermediate body 4b includes two opposite faces: a first face that is in contact with the spring element 5 and a second face that is in contact with the nut 11 when the backrest 1a is in the resting position. As shown in the figures, in one embodiment of the invention, it is possible to insert a washer 13 between the nut 11 and the second face of the intermediate body 4b of the support structure 4.
  • the spring element 5 is a cylindrical body with a coaxial opening in which an appendage 14 is fitted, attached to the bottom 3a of the base structure 3; wherein the opposite bases of said cylindrical body are in contact with said bottom 3a and with the intermediate body 4b of the support structure 4.
  • the intermediate body 4b of the support structure 4 comprises a base 15 and two opposing collateral wings 16, all of them 15, 16 attached to the transverse shaft 4a that forms part of the support structure 4; wherein the spring element 5 is hidden in a space delimited by the bottom 3a of the base structure 3, the base 15 and the two collateral wings 16 of the support structure 4.
  • the groove 12 is located in the aforementioned base 15, while said base 15 rests on one of the ends of the spring element 5 on one of the two opposite faces thereof, and the nut 11 or the washer 13 are in contact with the other paired face of said base 15.
  • the aforementioned securing device allows the tension of the oscillating damping system to be regulated, by simply screwing the nut 11 to a greater or lesser depth on the threaded extension 10.
  • the seat 1b is joined to the base structure 3 by means of screws 17 that are inserted from below through holes 19 located in wings 18 attached to the base structure 3; wherein said screws 17 thread into nut elements 22 fastened to a base body 23 that forms part of the seat 1b.
  • Said wings 18 are attached to the edges of the first 3b and second 3c side walls of the base structure 3, which is hidden below said seat 1b, as is the case with a part of the transverse shaft 4a and the intermediate body 4b of the support structure 4.
  • figures 4 , 5 and 6 show another embodiment of the invention different from that described above, with the difference that said embodiment of the invention dispenses with the securing device comprising at least the threaded extension 10, nut 11 and groove 12.
  • the washer 13 associated with the nut 11 is also dispensed with.
  • the oscillating damping system of the embodiment shown in said figures 4 , 5 and 6 is a simplified and simpler system with a minimum number of elements and high effectiveness.
  • the intermediate body 4b has a somewhat different size and configuration than that of the intermediate body 4b of the embodiment shown in figures 1 , 2 and 3 .
  • an end part of the base 15 that forms part of the intermediate body 4b abuts on the lower face of the base body 23 of the seat 1b in the resting position due to the action of the spring element 5.

Landscapes

  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP23169502.4A 2022-06-06 2023-04-24 Système d'amortissement oscillant pour le dossier d'un meuble d'assise Pending EP4289314A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES202230490 2022-06-06

Publications (1)

Publication Number Publication Date
EP4289314A1 true EP4289314A1 (fr) 2023-12-13

Family

ID=86185104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23169502.4A Pending EP4289314A1 (fr) 2022-06-06 2023-04-24 Système d'amortissement oscillant pour le dossier d'un meuble d'assise

Country Status (1)

Country Link
EP (1) EP4289314A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140003922A (ko) * 2012-07-02 2014-01-10 한의경 의자의 틸팅부재 및 이를 포함하는 의자
DE202014004814U1 (de) * 2014-06-06 2014-07-28 Nowy Styl Gmbh Sitz mit einer federnden Rückenlehne

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140003922A (ko) * 2012-07-02 2014-01-10 한의경 의자의 틸팅부재 및 이를 포함하는 의자
DE202014004814U1 (de) * 2014-06-06 2014-07-28 Nowy Styl Gmbh Sitz mit einer federnden Rückenlehne

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