EP2561777A1 - Mécanisme synchrone pour une chaise - Google Patents

Mécanisme synchrone pour une chaise Download PDF

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Publication number
EP2561777A1
EP2561777A1 EP12180206A EP12180206A EP2561777A1 EP 2561777 A1 EP2561777 A1 EP 2561777A1 EP 12180206 A EP12180206 A EP 12180206A EP 12180206 A EP12180206 A EP 12180206A EP 2561777 A1 EP2561777 A1 EP 2561777A1
Authority
EP
European Patent Office
Prior art keywords
axis
free
base unit
seat support
unit
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.)
Granted
Application number
EP12180206A
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German (de)
English (en)
Other versions
EP2561777B1 (fr
Inventor
Carsten Kelm
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PL12180206T priority Critical patent/PL2561777T3/pl
Publication of EP2561777A1 publication Critical patent/EP2561777A1/fr
Application granted granted Critical
Publication of EP2561777B1 publication Critical patent/EP2561777B1/fr
Not-in-force legal-status Critical Current
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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
    • 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 invention relates to a synchronous mechanism for a chair, in particular for an office chair, comprising a base unit, a seat support arranged above and movably on the base unit, a backrest support pivotably mounted on the base unit about a horizontally and chair-oriented pivot axis, and a preloading mechanism the preloading device exerts on the seat support an upward and on the backrest support a forward biasing force and wherein the seat support is connected via a the mobility of the seat support relative to the base unit enabling coupling mechanism with the base unit.
  • the invention relates to a chair, in particular an office chair.
  • Out DE 199 31 099 A1 is a chair known with a synchronous mechanism.
  • the mobility of the backrest and seat are mechanically coupled to each other via the synchronous mechanism.
  • the synchronous mechanism comprises a base unit, via which the synchronizing mechanism is fastened to a central chair column, wherein the chair column is provided at the bottom with a base with castors.
  • the padded seat is arranged on a seat carrier formed as a seat plate, which is connected via a coupling mechanism with the base unit.
  • the coupling mechanism comprises on the floor facing the bottom of the seat plate arranged bearing supports on which vertically aligned slots are formed, in which arranged on the base unit bearing pins are guided.
  • a compression spring assembly On the underside of the seat plate, a compression spring assembly is supported, which exerts on the seat plate an upward and on the backrest a forward biasing force. This ensures that the biasing force is dependent on the weight of each person sitting on the chair, whereby the seating comfort is to be improved.
  • the object of the invention is to provide a synchronous mechanism with which a chair, in particular an office chair, can be produced, which offers optimum seating comfort regardless of the respective type of weight loading of the seat.
  • the coupling mechanism is designed such that it positively controls the movements of the seat support relative to the base unit so that the seat support is movable back and forth between each other parallel positions with fixed backrest support ,
  • the synchronous mechanism according to the invention does not affect the size of the preload force, in which area the load of the seat or the seat support takes place with the weight of a user.
  • no load type of the seat support with the weight of a user leads to a tilting of the seat support to a horizontal Axis, which would be associated with the above disadvantage.
  • the synchronous mechanism according to the invention it is possible by the synchronous mechanism according to the invention to provide a chair, in particular an office chair, in which the biasing force is optimally regulated.
  • the biasing device according to a compression spring arrangement DE 199 31 099 A1 or have a differently configured, but substantially the same effect arrangement. It is essential only that the preloading device is designed and arranged such that it can be actuated by a movement of the seat support relative to the base unit.
  • the coupling mechanism has a arranged in the front region of the seat support front and a rear portion thereof disposed rear hinge assembly, wherein the front hinge assembly and the rear hinge assembly are mechanically coupled together such that movement of the front hinge assembly movement of the rear hinge assembly and vice versa causes.
  • This mechanical design of the coupling mechanism is very robust.
  • the two joint arrangements are preferably designed such that they prevent tilting of the seat support about an axis oriented in the chair longitudinal direction.
  • the mechanical coupling of the front hinge assembly with the rear hinge assembly preferably causes the seat support to not tilt about an axis oriented in the chair transverse direction.
  • each hinge assembly on two hinge units which are spaced from each other with respect to the chair transverse direction and mechanically coupled to each other such that a movement of the one hinge unit causes movement of the other hinge unit.
  • This mechanical coupling causes the seat support is not tilted about an axis aligned in chair longitudinal direction axis.
  • the seat support is formed substantially rectangular with respect to the horizontal, wherein one of the hinge units is arranged in each corner region of the seat support.
  • each front joint unit has two elements which are connected to one another in an articulated manner via a free first axis wherein the upper member is hingedly connected to the base unit and the seat support via a second axis and the lower member is hingedly connected to the base unit via a third axis, the free first, second and third axes being parallel to and spaced apart are arranged from the pivot axis, wherein the second axis is guided in the vertical direction end in slots on the base unit, wherein the free first axis in front of the second and the third axis is arranged and wherein the free first, the second and the third axis of the one front hinge unit form the free first, second and third axis of the other front hinge unit.
  • each rear hinge unit has two members pivotally interconnected by a free fourth axis, of which the upper member is otherwise pivotally connected to the base unit via a fifth axis and the lower member is connected via a sixth axis wherein the free fourth, fifth and sixth axes are parallel to and spaced from the pivot axis, the sixth axis being guided end to end in slots on the base unit, the free fourth axis being behind the fifth and sixth axes and wherein the free fourth, fifth and sixth axes of the one rear hinge unit form the free fourth, fifth and sixth axes of the other rear hinge unit.
  • the rear hinge units are designed structurally simple and robust.
  • each rear hinge unit on a coupling element which is connected at one end pivotally connected via a seventh axis with the seat support and the other via the sixth axis to the base unit, wherein the seventh axis of a rear hinge unit, the seventh axis of forms another rear joint unit.
  • the coupling element is thus connected via the sixth axis with the hinge units of the rear hinge assembly.
  • one of the coupling elements is arranged in each corner region of a seat carrier which is substantially rectangular with respect to the horizontal.
  • the free first axis is connected to the free fourth axis via at least one rigidly designed control element.
  • the arrangement of the control causes the mechanical coupling of front hinge assembly and rear hinge assembly.
  • two control elements are provided, which are arranged in the chair longitudinal direction and via which in each case the arranged on one side of the seat support front hinge unit is connected to the arranged on this side rear hinge unit.
  • the magnitude of the biasing force exerted by the biasing means is adjustable. This can be done by the user of the synchronous mechanism or a chair equipped with it even a very individual adjustment of seating comfort.
  • the preloading device comprises at least one compression spring arrangement which is supported on the underside of the seat support and on the upper side of a portion of the backrest support extending forwards beyond the pivot axis. It can be provided depending on the application, two or more compression spring arrangements.
  • the biasing means may comprise at least one tension spring which engages with one end on the free first axis and with the other end on the backrest support, such that they the free first axis in the direction of the rear hinge assembly and the Backrest support pushes forward.
  • two or more tension springs may be provided. By the force of the tension spring, the two joint units of the front joint arrangement are preferably erected and converted into a state corresponding to the unloaded state of the synchronous mechanism.
  • the invention also proposes a chair, in particular an office chair, which according to the invention is designed with a synchronizing mechanism according to one of the above-described embodiments or any combination thereof.
  • a chair in particular an office chair, which according to the invention is designed with a synchronizing mechanism according to one of the above-described embodiments or any combination thereof.
  • FIG. 1 shows an embodiment of the synchronous mechanism 1 according to the invention for a chair, not shown, in particular office chair, in the unloaded state.
  • the synchronizing mechanism 1 has a base unit 2, via which the synchronizing mechanism 1 is connected to a central chair column 3.
  • the synchronizing mechanism 1 comprises a seat support 4 which is arranged above and movably on the base unit 2 and which is designed in two parts according to the exemplary embodiment and has the seat support elements 5 and 6 which are designed as metal profiles bent at right angles.
  • the seat support elements 5 and 6 which are designed as metal profiles bent at right angles.
  • substantially horizontally extending portion 7 of the seat support members 5 and 6 holes 8 are arranged, via which a seat, not shown, connectable to the seat support 4, for example, screwed, is.
  • the synchronizing mechanism 1 also has a backrest support 9 which is pivotable about a pivot axis S oriented horizontally and in the chair transverse direction and which comprises a connecting part 10 directly connected to the pivot axis S and a back part 11 connected thereto, wherein on the back part 11 Also holes 12 are formed, via which a backrest, not shown, with the backrest support 9 is connectable.
  • the synchronizing mechanism 1 comprises a compression spring arrangement 13 which is supported on the underside of the seat support 4 and exerts on the seat support 4 an upward and on the backrest support 9 a forward biasing force.
  • the compression spring arrangement 13 has a compression spring 14, an upper bearing element 15 and a in FIG. 2 shown lower bearing element 16.
  • the compression spring 14 Via the upper bearing element 15, the compression spring 14 is supported on the underside of a crossbar 17 of the seat support 4, which are formed in slots 20 at the aligned in the vertical direction sections 19 and 20 of the seat support members 5 and 6.
  • the elongated holes 19 and 20 are formed such that at least two different biasing forces are adjustable over them, which in the embodiment shown by the fact that the crossbar 18 is brought into abutment with one or the other end of the slots. In the illustrated position of the crossbar a lower biasing force is set.
  • the seat support 4 is connected via a the mobility of the seat support 4 relative to the base unit 2 enabling coupling mechanism with the base unit 2, which will be explained in more
  • the coupling mechanism has a front joint arrangement 21 arranged in the front region of the seat support 4 and a rear joint arrangement 22 arranged in the rear region of the seat support 4.
  • the front hinge assembly 21 and the rear hinge assembly 22 are mechanically coupled together such that movement of the front hinge assembly 21 causes movement of the rear hinge assembly 22 and vice versa, as will become apparent hereinafter. This prevents that the seat support 4 tilts around an aligned in chair transverse direction, unspecified axis.
  • Each hinge assembly 21 and 22 has two hinge units 23 and 24 and 25 and 26, respectively, which are spaced apart from each other with respect to the chair transverse direction and mechanically coupled to each other such that movement of one hinge unit 23 or 25 causes movement of the other hinge unit 24 and 26, respectively ,
  • this mechanical coupling the seat support 4 is prevented from tipping over an axis oriented unspecified in chair longitudinal direction in the event of asymmetrical weight loading.
  • the front articulation unit 24 has two elements 27 and 28 which are connected to one another in a single manner via a free first axis A1.
  • the upper element 27 is hinged at the other end via a second axis A2 with the base unit 2 and the seat support 4 and the lower element 28 at the other end via a third axis A3 to the base unit 2.
  • the free first axis A1, the second axis A2 and the third axis A3 are arranged parallel to and spaced from the pivot axis S.
  • the second axis A2 is guided in the vertical direction end in slots 29 on the base unit 2, whereby the mobility of the seat support 4 in the vertical direction is limited relative to the base unit 2. Furthermore, the second axis A2 is guided in horizontal oblong holes 30 at the vertically aligned sections 19 and 20 of the seat support elements 5 and 6, the function of which FIGS. 5 to 8 becomes clear.
  • the free first axis A1 is arranged in front of the second axis A2 and the third axis A3.
  • the free first axis A1, the second axis A2 and the third axis A3 of a front hinge unit 23 form the free first axis A1, the second axis A2 and the third axis A3 of other front hinge unit 24.
  • first free axis A1 engage two tension springs 31 and 32, which cooperate with their other ends with a cross bar 33 which is fixed to the connecting part 10 of the backrest support 9.
  • tension springs 31 and 32 By means of the tension springs 31 and 32, the first free axis A1 is acted upon by force such that the front hinge units 23 and 24 endeavor to raise themselves.
  • Each rear articulation unit 25 or 26 has two elements 34 and 35, which are connected to one another in an articulated manner via a free fourth axis A4, which is clearer FIG. 2 becomes.
  • the upper element 34 is connected at the other end via a fifth axis A5 and the lower element 35 at the other end pivotally connected to the base unit 2 via a sixth axis A6.
  • the free fourth axis A4, the fifth axis A5 and the sixth axis A6 are arranged parallel to and spaced from the pivot axis S.
  • the sixth axis A6 is guided in the vertical direction at the end in oblong holes on the base unit 2.
  • the free fourth axis A4 is located behind the fifth axis A5 and the sixth axis A6.
  • the free fourth axis A4, the fifth axis A5 and the sixth axis A6 of the one rear hinge unit 25 and 26 form the free fourth axis A4, the fifth axis A5 and the sixth axis A6 of the other rear hinge unit 26 and 25, respectively.
  • Each rear hinge unit 25 or 26 also has a coupling element 37 or 38, of which in FIG. 1 only the coupling element 37 can be seen.
  • Each coupling element 37 or 38 is pivotally connected to the seat support 4 at one end via a seventh axis A7 and is hingedly connected to the base unit 2 via the sixth axis A6.
  • the seventh axis A7 of the one rear joint unit 25 or 26 forms the seventh axis A7 of the other rear joint unit 26 and 25, respectively.
  • the seventh axis A7 is connected to the crossbar 33 via two rockers 41.
  • the coupling elements 37 and 38 are thus connected to the rear elements 34 and 35 via the sixth axis A6. Through the coupling elements 37 and 38, movements of the seat support 4 on the rear hinge units 25 and 26 act.
  • the free first axis A1 is connected to the free fourth axis A4 via two rigidly formed control elements 39 and 40.
  • the compression spring 14 of the compression spring assembly 13 is compressed.
  • the second axis A2 and the sixth axis A6 are displaced in the respective oblong holes 29 and 36, respectively.
  • These movements are mechanically coupled to each other by means of the controls 39 and 40.
  • the front joint unit 24 is actuated by weight load of the seat support 4, the first free axis A1 moves in the Figures 2 and 4 to the left.
  • the free fourth axis A4 is also moved to the left via the controls 39 and 40, which in turn causes a movement of the sixth axis A6 in the oblong holes 36 down.
  • the coupling elements 37 and 38 are taken, which in turn take the seat support 4 and thereby a shift of the right in the Figures 2 and 4 shown, cause the rear part of the seat support 4, so that a parallel displacement of the entire seat support 4 relative to the base unit 2 takes place.
  • mechanical reversal takes place on actuation of the rear hinge units 25 and 26, as it were an operation of the front hinge units 23 and 24 to cause an exclusively parallel displacement of the entire seat support 4.
  • FIGS. 5 to 8 show that in the FIGS. 1 to 4 In this state of the synchronous mechanism 1, the second axis A2 is located at the front stop of the elongated holes 30 in the vertical sections 19 and 20 of the seat support members 5 and 6. At the same time, the tension springs 31 and 32 stretched.
  • the actuating mechanism of the front hinge units 23 and 24 and the rear hinge units 25 and 26 corresponds to the above with respect to the FIGS. 1 to 4 described.
  • FIG. 9 shows that in the FIGS. 1 to 4 shown embodiment of the synchronous mechanism 1 according to the invention in a transparent view from above and illustrates once again the spatial arrangement of the components of the synchronous mechanism 1 to each other.
  • tension springs 31 and 32 can be designed such that they assume the same function as the compression spring arrangement 13 or even replace it.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
EP12180206.0A 2011-08-25 2012-08-13 Mécanisme synchrone pour une chaise Not-in-force EP2561777B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12180206T PL2561777T3 (pl) 2011-08-25 2012-08-13 Mechanizm synchroniczny dla krzesła

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011081588A DE102011081588A1 (de) 2011-08-25 2011-08-25 Synchronmechanik für einen Stuhl

Publications (2)

Publication Number Publication Date
EP2561777A1 true EP2561777A1 (fr) 2013-02-27
EP2561777B1 EP2561777B1 (fr) 2014-07-16

Family

ID=46934398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12180206.0A Not-in-force EP2561777B1 (fr) 2011-08-25 2012-08-13 Mécanisme synchrone pour une chaise

Country Status (6)

Country Link
US (1) US8931841B2 (fr)
EP (1) EP2561777B1 (fr)
DE (1) DE102011081588A1 (fr)
DK (1) DK2561777T3 (fr)
ES (1) ES2515040T3 (fr)
PL (1) PL2561777T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014226645B4 (de) * 2014-12-19 2023-10-05 Hangzhou Zhongtai Industrial Group Co., Ltd. Verstellmechanik zur Einstellung einer auf eine Rückenlehne eines Stuhls einwirkenden Rückstellkraft und Bürostuhl mit einer solchen Verstellmechanik
US10463153B2 (en) * 2016-06-09 2019-11-05 Steelcase Inc. Seating arrangement
DE202016103309U1 (de) 2016-06-22 2016-07-08 Hong Kong Tiansheng International Group Limited Einstellbare Drehstuhlgrundbasis mit einem Schwingbereich nach vorne und hinten
CN108371436B (zh) * 2018-04-25 2023-10-27 严澄宇 弹力跷跷板式的自由倾仰机构及自由调节转椅
US11197548B2 (en) * 2019-12-16 2021-12-14 Allseating Corporation Reclining control system for a chair

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7907725A (nl) * 1978-10-20 1980-04-22 Protoned Bv Ergonomische stoel.
US4709962A (en) * 1984-10-24 1987-12-01 Kloeber Gmbh & Co. Work chair with a tilting mechanism for seat squab and backrest
US4986601A (en) * 1988-11-30 1991-01-22 Itoki Co., Ltd. Tilting mechanism for supporting seat portion and backrest of chair in integral fashion
EP0247311B1 (fr) * 1986-05-26 1991-03-13 Drabert Söhne GmbH & Co. Chaise
EP0418731A1 (fr) * 1989-09-16 1991-03-27 Rolf Völkle Chaise
DE19921153A1 (de) * 1999-05-07 2000-11-09 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
DE19931099A1 (de) 1999-07-06 2001-02-01 Roeder Peter Stuhl
DE10219478B4 (de) * 2002-04-30 2006-07-13 Klöber GmbH Stuhl mit vom Benutzergewicht abhängigen Kraftspeicher
DE102007059986A1 (de) * 2007-12-11 2009-06-18 Sedus Stoll Ag Bürostuhl

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035466A (en) * 1989-04-03 1991-07-30 Krueger International, Inc. Ergonomic chair
US5556163A (en) * 1994-08-17 1996-09-17 Eac Corporation Automatically adjustable office and task chairs
US5782536A (en) * 1995-02-17 1998-07-21 Steelcase Inc. Modular chair construction and method of assembly
US6027168A (en) * 1998-06-05 2000-02-22 Leggett & Platt, Inc. Chair seat horizontal adjustment mechanism
DE10194640B4 (de) * 2000-10-16 2008-03-27 Kokuyo Co., Ltd. Stuhl
US7159942B2 (en) * 2004-08-26 2007-01-09 L & P Property Management Company Seat slide adjustment mechanism

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7907725A (nl) * 1978-10-20 1980-04-22 Protoned Bv Ergonomische stoel.
US4709962A (en) * 1984-10-24 1987-12-01 Kloeber Gmbh & Co. Work chair with a tilting mechanism for seat squab and backrest
EP0247311B1 (fr) * 1986-05-26 1991-03-13 Drabert Söhne GmbH & Co. Chaise
US4986601A (en) * 1988-11-30 1991-01-22 Itoki Co., Ltd. Tilting mechanism for supporting seat portion and backrest of chair in integral fashion
EP0418731A1 (fr) * 1989-09-16 1991-03-27 Rolf Völkle Chaise
DE19921153A1 (de) * 1999-05-07 2000-11-09 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
DE19931099A1 (de) 1999-07-06 2001-02-01 Roeder Peter Stuhl
DE10219478B4 (de) * 2002-04-30 2006-07-13 Klöber GmbH Stuhl mit vom Benutzergewicht abhängigen Kraftspeicher
DE102007059986A1 (de) * 2007-12-11 2009-06-18 Sedus Stoll Ag Bürostuhl

Also Published As

Publication number Publication date
PL2561777T3 (pl) 2014-12-31
EP2561777B1 (fr) 2014-07-16
ES2515040T3 (es) 2014-10-29
US20130221718A1 (en) 2013-08-29
DE102011081588A1 (de) 2013-02-28
DK2561777T3 (da) 2014-10-20
US8931841B2 (en) 2015-01-13

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