EP3653082B1 - Chaise de bureau - Google Patents

Chaise de bureau Download PDF

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Publication number
EP3653082B1
EP3653082B1 EP18206591.2A EP18206591A EP3653082B1 EP 3653082 B1 EP3653082 B1 EP 3653082B1 EP 18206591 A EP18206591 A EP 18206591A EP 3653082 B1 EP3653082 B1 EP 3653082B1
Authority
EP
European Patent Office
Prior art keywords
chair
springs
seat
seating panel
seat element
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
EP18206591.2A
Other languages
German (de)
English (en)
Other versions
EP3653082A1 (fr
Inventor
Mark Jones
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.)
Profim SP
Original Assignee
Profim SP
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 Profim SP filed Critical Profim SP
Priority to PL18206591T priority Critical patent/PL3653082T3/pl
Priority to EP18206591.2A priority patent/EP3653082B1/fr
Publication of EP3653082A1 publication Critical patent/EP3653082A1/fr
Application granted granted Critical
Publication of EP3653082B1 publication Critical patent/EP3653082B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • 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
    • 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
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03288—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with resilient blocks
    • 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
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • A47C7/144—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions with array of movable supports

Definitions

  • This invention relates to a chair, specifically to an office chair, comprising a support panel for a seat element and a substantially vertical back support element.
  • An office chair allows the user to influence and adjust his or her seating dynamic to varying degrees.
  • the office chair In contrast to a rigid chair, where there is no provision for changing the relative positions of seat to backrest, the office chair has provision for adjusting those relative positions according to the requirements of the user.
  • the mechanisms provided in an office chair serve to encourage the user into a dynamic sitting behaviour. This entails changing his or her position regularly, thus avoiding muscular discomforts such as cramp or fatigue and thus allowing the user to sit for longer periods without experiencing the normal problems associated with prolonged sitting, or at least substantially reducing those effects.
  • EP2725943 L & P Property Mgt
  • EP2725943 L & P Property Mgt
  • Another chair mechanism is known from DE10106791A1 (SDM HANSEM) which discloses an office chair which accommodates some of the user's movements and whose seat panel tilts on a triangle of springs.
  • the chair mechanism includes a back rest mounted so that it can rotate about its longitudinal axis.
  • DE29908599 describes a chair in which ha seat structure and a foot structure are linked in such a way that the seat structure can be swilled relative to the foot structure.
  • US2012/292968 describes a chair in which the seat portion is supported on a recline mechanism that causes the seat portion to move upon a reclining action of the back rest.
  • this disclosure involves a rigid connection between the seat panel and the backrest such that the seat and the backrest have to move together. Such an arrangement has been shown not to be favoured by many users.
  • a good office chair seating solution benefits the chair users by providing motion, this is to ensure that the chair users are not static for long periods of time as this is bad for the chair users' health.
  • the present invention discloses an office chair which alleviates the above problems and disadvantages.
  • the front connection is a ball joint located in the centre plane of the seat. This ball joint is formed from two half spheres forming a complementary shaped housing enclosing said ball.
  • the upper half of said housing is fixed directly to the lower panel of the chair seat panel the lower part is assembled by means of bolt which reaches through the ball of the joint.
  • This arrangement essentially creates a 360 degree pivot around the centre point of said ball joint.
  • the ball is mounted on the top surface of the seat element and the housing surrounding the ball is mounted under the chair seating panel, thus allowing the former to lean sideways when the user leans sideways.
  • the rear of the seat is essentially floating on two compression springs spaced evenly away from the central plane (these could be any spring type, rubber, leaf spring etc.). These compression springs may rest in spring pockets lodged in the seat element into which pockets the compression springs may recede when coil springs are used.
  • the resulting motion is best described as a rolling motion where the tilting motion is strongest at the rear of the chair seating panel and reduces in amplitude the nearer it gets to the front of that panel.
  • a useful option would be to include a means for the user to lock the twisting motion, hence precluding any sideways twisting of the chair seating panel when it is not wanted.
  • This locking option can be realised by putting a sliding block either side of the ball joint which sliding blocks can be moved toward the centre of the seat panel or away from it, thus either increasing or reducing the effective space between the underside of said chair seating panel and said seat element.
  • Tilt limiters either side of the central point of the seat element are required to stop the seat from flipping over when leaning to the side.
  • These tilt limiters can vary in form, they could be screws/ bolts, wires or even integrated hook features, the latter of which are the preferred realisation. Straps could also be used at the front of the seat if required for strength purposes.
  • An office chair comprising a seat element mounted movably on a fixed support element and a back support element, which arrangement simultaneously allows the seat element to move and tilt backwards when the user leans backwards and which seat element carries the chair seating panel in such a way that when the user leans to a side, said chair seating panel tilts to the same side according to the user's movement and independently of said chair's back support element and wherein the sideways tilting mechanism comprises a ball joint at the front of said chair seating panel and two springs at the rear.
  • each of said tilt limiters comprises two hooks which engage with each other in such a way that the tilt of the said seating panel is limited by said hooks touching.
  • the ball joint at the front of the seat element may consist of a ball mounted in a housing comprising two half spheres fixed to said chair seating panel.
  • the ball joint may sit in the housing whose inside is shaped to match said ball and wherein said ball joint forms a 360 degrees pivot around its centre.
  • the two springs are compression springs on which the rear of the chair seating panel rests.
  • Each of said springs may rest in a retaining pocket which retaining pockets are set into said seat element spaced equally on either side of the centre of said seat element.
  • Types of suitable spring include coil, leaf or rubber springs.
  • Figure 1 shows the basic support structure of the chair.
  • the seat element (3) which carries the chair seating panel (4) is supported by a fixed element (1) to which a back element (2) is hinged and said seat element (3) is hinged at its front to the fixed element (1) and at its rear to the back element (2).
  • This basic arrangement enables the chair to be rocked backwards and apart from the back rest declining when the user leans back, the seat panel moves backwards and its rear end also tilts downwards. Thus giving the user a pleasant and relaxing position.
  • This figure also shows the front support for the chair seating panel (4) in the shape of a ball joint (13) and the rear support in the shape of two spring assemblies (14, 15) on which the rear end of the chair seating panel (4) floats, one of which is shown.
  • Figure 2 shows a similar elevational view with the chair seating panel (4) in place and illustrating in cut out view, one of the rear seat panel spring assemblies (14, 15) on which it floats.
  • FIG 3 shows side elevational view through the centre of the seat element (3). (partially in section) with the forward ball joint partially assembled (13) and one of the rear spring assemblies (14, 15)
  • This figure also shows the front end 3A' of the top panel (3A) to the seat element (3), which is pointed downwards as a safe-guard against fingers being trapped in the ball joint assembly immediately behind it, when manipulating an adjustment mechanism, which is located at the front of the chair seat.
  • Figure 4 shows the basic construction of the chair with the chair seat element (4) in place. Illustrated are the two halves of the front ball joint housing (10, 11) held together by a sturdy bolt (12) and joining the complete housing (10, 11) to the bottom of the chair seat panel (4A) and at the same time holding the ball part (5) of the joint securely in place.
  • the rear support assemblies (14, 15) are here in the form of coil springs (6, 7) which rest in pockets (8, 9).
  • Figure 5 shows a cross-sectional view of the unstressed position of the front ball joint (13) with the seat in a horizontal position. It shows the ball part (5) of the ball joint fixed to the top panel (3A) of the seat element surrounded by the assembled halves of the ball housing (10, 11), which in turn, is attached to the lower panel (4A) of the chair seat panel.
  • Figure 6 on the same sheet, shows the chair seat panel (4) tilted to one side and the front ball joint rotating its housing.
  • the hole (5a) in ball (5) is larger in diameter than the diameter of the tubular connection piece (12a) providing a guide for bolt (12), the bolt holding the two halves (10, 11) of the housing together.
  • the play, thus created, is sufficient to allow the housing (10, 11) to rotate a certain amount in relation to ball (5).
  • Figure 7 shows the rear springs in rest position with the chair seat element (4) horizontal and Figure 8 shows said chair seat element (4) leaning sideways and hence one of the springs (6, 7) being compressed and the other being stretched.
  • figure 9 shows the preferred realisation of the tilt limiters between the chair seating panel (4) and the seat element (3).
  • These limiters comprise a hook (16) depending from the chair seating panel (4) and engaging a second hook (17) attached to the seat element limiting the amount of tilt by physical contact of said two hooks at the point of maximum tilt, thus acting as a stop when the seat panel is tilted to the opposite side.
  • limiters could also be in the form of straps connecting the chair seating panel with the seat element or loops which pass through holes in lower panel of the chair seating panel and whose loose ends are fixed to the seat element.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (6)

  1. Chaise de bureau comprenant un élément de siège (3) monté de façon mobile sur un élément d'appui fixe (1) et un élément d'appui dorsal (2), dont la disposition permet simultanément à l'élément de siège (3) de bouger et de s'incliner vers l'arrière lorsque l'utilisateur se penche en arrière et dont l'élément de siège (3) supporte le bloc d'assise du siège (4), de sorte que quand l'utilisateur de penche d'un côté, ledit bloc d'assise du siège (4) s'incline du même côté en fonction du mouvement exécuté par l'utilisateur et indépendamment dudit élément d'appui dorsal du siège (2) et dans lequel ledit mécanisme d'inclinaison latéral comporte un joint à bille (5) situé en façade dudit bloc d'assise du siège (4) et deux ressorts (6, 7) en partie arrière, caractérisé en ce que l'inclinaison maximale dudit bloc d'assise du siège (4) est déterminée par une paire de limiteurs d'inclinaison qui connectent la partie inférieure dudit bloc d'assise du siège et ledit élément de siège et positionnée à équidistance vers l'extérieur desdits ressorts (6, 7), et en ce que chacun desdits limiteurs d'inclinaison est doté de deux crochets (16, 17) qui s'emboîtent l'un dans l'autre de sorte que l'inclinaison dudit bloc d'assise est limitée par le contact desdits crochets.
  2. Siège de bureau selon la revendication 1, dans lequel ledit joint à bille (5) situé en façade de l'élément de siège (3) consiste en une bille (5) montée sur un logement (13) comprenant deux demi-sphères (10, 11) fixées audit bloc d'assise du siège (4).
  3. Siège de bureau selon la revendication 2, dans lequel ledit joint à bille (5) est intégré au logement (13) dont la forme de la partie interne correspond à ladite bille (5) et dans lequel ledit joint à bille pivote de 360 degrés autour de son centre.
  4. Siège de bureau selon l'une quelconque des revendications précédentes, dans lequel lesdits deux ressorts (6, 7) sont des ressorts de pression sur lesquels repose la partie arrière du bloc d'assise du siège (4).
  5. Siège de bureau selon la revendication 4, dans lequel chacun desdits ressorts (6, 7) repose sur une poche de retenue (8, 9), lesquelles poches de retenue sont disposées dans ledit élément de siège (3) espacées à équidistance de part et d'autre du centre dudit élément de siège (3).
  6. Siège de bureau selon l'une quelconque des revendications précédentes, dans lequel lesdits ressorts peuvent être des ressorts hélicoïdaux, des ressorts à lames ou des ressorts en caoutchouc.
EP18206591.2A 2018-11-15 2018-11-15 Chaise de bureau Active EP3653082B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL18206591T PL3653082T3 (pl) 2018-11-15 2018-11-15 Krzesło biurowe
EP18206591.2A EP3653082B1 (fr) 2018-11-15 2018-11-15 Chaise de bureau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18206591.2A EP3653082B1 (fr) 2018-11-15 2018-11-15 Chaise de bureau

Publications (2)

Publication Number Publication Date
EP3653082A1 EP3653082A1 (fr) 2020-05-20
EP3653082B1 true EP3653082B1 (fr) 2021-01-06

Family

ID=64331832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18206591.2A Active EP3653082B1 (fr) 2018-11-15 2018-11-15 Chaise de bureau

Country Status (2)

Country Link
EP (1) EP3653082B1 (fr)
PL (1) PL3653082T3 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29908599U1 (de) * 1999-05-14 1999-08-05 Loeffler Buerositzmoebel Gmbh Sitzteillagerung mit Synchronmechanik
DE10106791A1 (de) * 2001-02-12 2002-08-14 Sdm Hansen Gmbh St Margrethen Sitzmöbel
AU2007302891B2 (en) * 2006-10-04 2013-05-02 Formway Furniture Limited A chair
US9060612B2 (en) * 2011-05-17 2015-06-23 Rebecca M. Lee Balance chair
US9277821B2 (en) 2011-07-01 2016-03-08 L&P Property Management Company Tilt mechanism for a chair and chair
DE102014006058B4 (de) 2014-04-26 2017-03-23 Grupo Forma 5, S.L.U. Bürostuhl mit Synchronmechanik

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
PL3653082T3 (pl) 2021-11-15
EP3653082A1 (fr) 2020-05-20

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