EP2926690A1 - Mécanisme pour un siège de bureau - Google Patents

Mécanisme pour un siège de bureau Download PDF

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Publication number
EP2926690A1
EP2926690A1 EP15000845.6A EP15000845A EP2926690A1 EP 2926690 A1 EP2926690 A1 EP 2926690A1 EP 15000845 A EP15000845 A EP 15000845A EP 2926690 A1 EP2926690 A1 EP 2926690A1
Authority
EP
European Patent Office
Prior art keywords
support
backrest
point
spring element
seat
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
EP15000845.6A
Other languages
German (de)
English (en)
Other versions
EP2926690B1 (fr
Inventor
Hermann Bock
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.)
Bock 1 GmbH and Co KG
Original Assignee
Bock 1 GmbH and Co KG
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 Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Publication of EP2926690A1 publication Critical patent/EP2926690A1/fr
Application granted granted Critical
Publication of EP2926690B1 publication Critical patent/EP2926690B1/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
    • A47C1/031—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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03211—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by electric motors
    • 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
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the invention relates to a mechanism for an office chair with a base support placeable on a chair column, with a arranged on the base support, relative to the base support movable seat support and coupled to the seat support backrest, wherein pivoting the backrest movement of the seat support relative to the Causes base carrier.
  • a kinematics is provided which brings a certain relative movement of the seat and backrest to each other, so that there is a correlated seat-backrest movement.
  • An object of the present invention is to provide an alternative solution for adjusting the pivoting resistance of the backrest of an office chair. This object is achieved by a mechanism according to claim 1.
  • the mechanism according to the invention comprises a track element which is movably connected on one side to the base carrier and on the other hand to a seat carrier bonding point with the seat carrier, wherein pivoting of the backrest causes a change of the position and / or the position of the web element.
  • the mechanism further comprises on the one hand on the web element and on the other hand on the seat support or on the backrest acting spring element, wherein the spring element is acted upon in a movement of the seat support relative to the base support.
  • the mechanism also includes an adjusting device for changing the position of the point of application of the spring element on the web element.
  • the invention is based on the idea of adjusting the pivoting resistance of the backrest of the office chair in that the position of a point of application of the spring element is changed. As a result, the spring travel of the spring element is changed. For the same pivoting of the backrest thus the spring force and thus the pivotal resistance of the backrest can be set stronger or weaker and thus adapted to different body weights of the user.
  • a basic idea of the invention is to change the position of the point of application of the spring element in a particularly simple and elegant way, by providing that the spring element does not act directly on one of the main components of the mechanism, but rather one of the two main components relevant here the mechanics, namely the seat support and the base support to use interconnecting coupling element, which cooperates with the spring element and on which engages the spring element at a certain point.
  • the invention makes use of the possibility to use the different movement characteristics of these two main components in an advantageous manner for adjusting the pivoting resistance.
  • the position of the point of the spring element on the web element can be changed according to the invention in such a way that the spring element against the spring force of the backrest is pivoted and which in this case is acted upon by a force, both at a point in the vicinity of the connection point of the web member the base support as well as at a point of application in the vicinity of the point of connection of the web element with the seat support and moreover can preferably attack at any point between these two extremes.
  • a first, preferably fixed component 2 for example, a base support a mechanism for an office chair
  • a second, movable member 4 for example, a seat support this mechanics
  • the spatially adjustable one end 37 of a spring element 34 engages to form a point of application 40
  • the opposite, fixed other end 38 of the spring element 34 engages the second component 4.
  • the mechanism 1 has a base support 2, which is set by means of a cone seat 3 on the upper end of a chair column (not shown), see FIGS. 5 and 6 ,
  • the mechanism 1 comprises a seat support 4 and a backrest support 5 which is forked in plan view and whose cheeks 6 are arranged on both sides of the base support 2.
  • On the seat support 4 is usually provided with a padded seat seat (not shown) of the office chair mounted.
  • the backrest support 5 is pivotally connected to the free ends 7 of its cheeks 6 in the vicinity of the cone seat 3 with the base support 2.
  • the backrest support 5 can in other words with respect to the fixed base support 2 pivot about a transverse to the seat longitudinal direction 8 axis of rotation 9 in the pivoting direction 11 backwards down.
  • the seat support 4 is articulated using a transverse to the seat longitudinal direction 8 pivot axis 13 such that a pivoting of the backrest support 5 in the pivoting direction 11, ie from an upright starting position ( Fig. 5 ) in a rear pivot position ( Fig. 6 ), a corresponding subsequent movement of the seat support 4 relative to the fixed base support 2 entails.
  • the manner in which the pivotable backrest support 5 is coupled to the seat support 4 plays no role in the present invention. It can be a direct or an indirect coupling.
  • the front end 14 of the base support 2 terminates in two arms 15 ending on both sides of the seat support 4.
  • the mechanism 1 is mirror-symmetrical in terms of the central longitudinal plane, as far as the actual kinematics is concerned, see Fig. 7 to 10 , In that regard, in the following description always be based on both sides pairwise existing construction elements of the mechanism 1.
  • the seat support 4 In the Fig. 7 to 10 is the seat support 4 not shown for better clarity of the structural design of the mechanism 1.
  • Front or “front” means that a component in the seat longitudinal direction 8 is arranged at the front or refers to a extending in the direction of the front seat edge 16 and pointing in this direction component
  • back or “rear” means in that a component in the seat longitudinal direction 8 is arranged behind or relates to a component extending in the direction of the backrest or of the backrest support 5 or pointing in this direction.
  • the statements “above” and “below” refer to the intended use state of the office chair or office chair mechanism 1.
  • each arm of the base support 2 as in the Fig. 7 to 11 illustrates a serving as a track element in the context of the invention pivot bar 18, which, depending on how much the backrest is pivoted, more or less transverse to the seat support longitudinal direction 8 extends.
  • the one end 21 of the pivot bar 18 is connected to a base support connection point 22 by means of a suitable articulation to form a pivot joint with the base support 2, more precisely with an arm 15 of the base support 2.
  • a about a transverse to the seat longitudinal direction 8 axis of rotation 23 is pivotally mounted on the arm 15, substantially in seat longitudinal direction 8 extending support member 24 is provided which opens fork-shaped forward and between its fork ends 25 a support 26 for the end 21 of the swivel bar 18 forms.
  • the fork ends 25 lie on both sides of the side walls 27 of the pivot bar 18, which point in the non-pivoted starting position up and down.
  • the support member 24 is thus executed as it were as a double joint, since it not only allows its rotation about the axis of rotation 23, but is also suitable to provide the pivot bar 18 regardless of their occupied depending on the pivoting normal or oblique position an abutment.
  • the opposite other end 28 of the pivot bar 18 is movably connected to a seat carrier connection point 29 with the seat support 4, more precisely with a central web 30 of the seat support 4 which extends from the front seat support transverse frame 19 and extends in the seat support longitudinal direction 8.
  • the elongated pivot bar 18 is provided at this end 28 with a bent nose 31 which rotatably rests in a suitable, forwardly opening, a pivot point defining receptacle 32 of the web 30.
  • the base support 2 is thus connected via the two pivotal strips 18 as coupling elements with the seat support 4.
  • the arms 15 of the base support 2 or - depending on the angle of view - pass through the pivotal strips 18 or the support elements 24 used for the lateral frame parts 20 of the seat support 4, which have passage openings in the form of elongated holes 33 for this purpose.
  • the seat support 4 moves with the directly or indirectly coupled to the seat support 4 backrest support 5 in the pivoting direction 11 back down, resulting in the end of the fixed arm 15 of the Base carrier 2 and the support member 24 certain base support connection point 22 in the slot 33 of the seat support 4 moves forward (see Fig. 8 and 10 ).
  • the base support 2 thus forms with the seat support 4 a kind of rotary / sliding joint.
  • the basic idea of the invention is independent of the specific movement carried out by the seat support 4 relative to the base support 2 during pivoting of the backrest. In general, however, in the movement of the seat support 4 is a movement in the seat longitudinal direction 8, which is superimposed by a tilting or pivoting movement of the seat support 4.
  • the backrest can perform a defined pivoting movement, the mechanism 1 with the backrest or the backrest support 5 directly or indirectly cooperating spring elements 34.
  • the pivoting resistance of the backrest is determined during pivoting from a starting position into a pivoting position and the corresponding restoring force of the backrest.
  • An in the seat longitudinal direction 8 forward facing surface of the pivot bar 18 is formed as a support 35 for serving as a support element threaded nut 36.
  • the front end 37 of a spring element 34 is pivoted to form a suitable connection point 39.
  • the spring element 34 is suspended there.
  • the spring element 34 thus acts on the threaded nut 36 at a defined point 40 of the pivot bar 18, see Fig. 11 , namely at the point where the threaded nut 36 is supported on the support 35 of the pivot bar 18.
  • the spring element 34 in this case is a single helical coil spring, more specifically a helical tension spring.
  • other spring elements 34 or spring packs with a plurality of spring elements 34 may also be used.
  • the spring elements 34 are partially shown only incomplete.
  • the opposite rear end 38 of the spring element 34 engages the seat support 4 in the rear region, for example, the rear end 38 of the spring element 34 is supported on the rear seat carrier transverse frame 17 and thus define rear points of attack 41 or the spring element 34 is connected to the rear Late 38 in the common pivot axis 13 of seat support 4 and backrest support 5 mounted.
  • the rear end of the spring element can also act directly on the backrest support.
  • two spring elements 34 are provided which engage with their front points of attack 40 on the pivotal strips 18 on both sides of the web 30.
  • the distance between the two rear points of attack 41 of the spring elements 34 to each other is less than the distance between the two front points of attack 40 to each other both in the non-pivoted basic position and in the maximally rearward pivoted pivot position.
  • the spring elements 34 lie obliquely to the chair longitudinal direction 8 and enclose therebetween an acute angle in the mechanism 1.
  • the spring element 34 is acted upon pivoting of the backrest support 5 and thus a movement of the seat support 4 relative to the base support 2, the tension spring is tensioned.
  • the case covered travel is dependent on the position of the front point of attack 40, so the position of the threaded nut 36 on the pivot bar 18, relative to the rear point 41 of the spring element 34.
  • the type of adjustment of the pivoting resistance will be described below.
  • the position of the front engagement point 40 of the spring element 34 on the pivot bar 18 is variable by means of an adjusting device 44, as in detail with reference to FIG Fig. 11 explained.
  • an adjusting device 44 serving as a guide element threaded spindle 45 is provided, on which the threaded nut 36 is guided and along the support 35 of the swivel bar 18 is positioned movable.
  • the threaded nut 36 for changing the position of the front engagement point 40 of the spring element 34 between a base rail connection point near position 46 and a Weglichsticiannahen position 47 is movable and steplessly positionable in any position between these two end positions 46, 47, whereby a particularly comfortable adjustment of the pivoting resistance of Backrest is possible.
  • the distance between the front point 40 of the spring element 34 on the pivot bar 18 and the rear point 41 of the spring element 34 on the seat support 4 or the backrest support 5 does not change with a change in the position of the front point 40, so that a "powerless" Adjustment of the swivel resistance is possible.
  • the spring element 34 is not biased in such an adjustment.
  • the support 35, which defines the guideway for the nut 36 is formed by a circular section, wherein the direction of action of the spring element 34 lying in the longitudinal axis 48 of the spring element 34 corresponds to the radius of the circular path 49.
  • the center of the circular path 49 is defined by the rear point 41 of the spring element 34.
  • a swivel strip 18 is used with a differently executed support 35, in which instead of the circular path 49, a web is formed with a non-constant radius, for example a linearly extending web or a non-circular, defined differently extending running path, the bias of the spring element 34 can be changed at the same time selectively when setting the pivoting resistance.
  • the threaded spindle 45 is held in its position on the support 35 of the swivel bar 18 only on one side. For this purpose, it has at its seat carrier-side end on a manner of a ball head formed connecting piece 51 which rests in a corresponding ball head receptacle 52 in the web 30 articulated, see again Fig. 11 ,
  • the threaded spindle 45 extends at the seat carrier end 28 of the pivot bar 18 in the region of the bent nose 31 of the pivot bar 18 between the upper and lower side wall 27 of the pivot bar 18, the at least in the seat carrier side end 28 of the pivot bar 18 a corresponding spindle receptacle 53 between them train, see Fig.
  • the threaded spindle 45 and the pivot bar 18 thereby have the same seat carrier pivot point on the web 30, so that it is at a pivoting of the backrest no offset between the guided by the threaded spindle 45 threaded nut 36 on the one hand and the support 35 of the pivot bar 18 on the other hand, the threaded nut 36 so always optimally rests on the support 35 of the pivot bar 18.
  • the connecting piece 51 of the threaded spindle 45 is designed so that it can absorb pressure forces acting in the direction of the web 30, which are caused during the pivoting of the backrest by corresponding spring force components.
  • a pivoting of the backrest causes a change in both the position and the position of the pivot bar 18. Since the seat support 4 moves in the pivoting direction 11 back down and the pivot bar 18 on the web 30 of the seat support 4 only pivoted in a pivot point, the pivot bar 18 must tilt relative to the base support 2 in a pivoting of the backrest. In particular, there is a tilting of the swivel strip 18 about the axis of rotation 23 of the support element 24, as well as from a comparison of the positions of the swivel strips 18 in the Fig. 7 and 8th or in the Fig. 9 and 10 immediately becomes clear.
  • the swivel strip 18 is properly held even in its tilted position between the base support 2 and seat support 4, since it is acted upon in this state by the spring element 34 in the direction of the rear engagement points 41.
  • the pivot bar 18 is held on its side walls 27 both base carrier side and seat carrier side of at least parts of the connecting elements 25, 32.
  • An adjustment of the position of the threaded nut 36 on the threaded spindle 45 is effected by a rotation of the Threaded spindle 45 about its longitudinal axis 54, see Fig. 11 ,
  • Each displacement of the threaded nut 36 in the direction of the base carrier connection point near the position 46 thereby increases the spring travel of the spring element 34 during pivoting of the backrest.
  • the ball head receptacle 52 is for this purpose by a manually operable actuator (not shown), for example in the form of a handwheel or the like, driven by a gear transmission, see Fig. 12 ,
  • a connected to the actuator transmission element, here in the form of a rotary rod 55 drives a arranged in the web 30, provided with a ring gear drive wheel 56 at.
  • the torque is transmitted to the receiving element 50, which is likewise provided with a toothed rim, via a gearwheel 57, which is also in the web 30 and is in engagement with the drive wheel 56, wherein the receiving component comprises the two ball head receivers 52 in which the connecting pieces 51 of FIG Threaded spindles 45 hinged and rotatable, but eino without rotational degree of freedom.
  • the receiving member 50 By rotation of the rotary rod 55, the receiving member 50, so that the ball head receptacles 52 and thus also the threaded spindles 45 inserted therein are rotated.
  • the receiving member 50 and the other components 56, 57 of the transmission are mounted in the web 30 in a suitable manner.
  • Alternative ways of driving the threaded spindles 45 include, for example, the use of Bowden cables or the use of a universal joint.
  • both threaded spindles 45 of the mechanism 1 by a common actuator and a single rotary rod 55.
  • the threaded spindles 45 are provided with opposing threads 58 (right and left hand threads).
EP15000845.6A 2014-04-04 2015-03-23 Mécanisme pour un siège de bureau Active EP2926690B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014104870.9A DE102014104870A1 (de) 2014-04-04 2014-04-04 Mechanik für einen Bürostuhl

Publications (2)

Publication Number Publication Date
EP2926690A1 true EP2926690A1 (fr) 2015-10-07
EP2926690B1 EP2926690B1 (fr) 2016-09-28

Family

ID=53008234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15000845.6A Active EP2926690B1 (fr) 2014-04-04 2015-03-23 Mécanisme pour un siège de bureau

Country Status (3)

Country Link
US (1) US9549614B2 (fr)
EP (1) EP2926690B1 (fr)
DE (1) DE102014104870A1 (fr)

Cited By (1)

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US20220087425A1 (en) * 2020-09-18 2022-03-24 Dinkar Chellaram Synchronous-tilt reclining chair

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DE202013102059U1 (de) * 2013-05-11 2014-08-12 Bock 1 Gmbh & Co. Kg Synchronmechanik
CA2852691A1 (fr) * 2014-05-27 2015-11-27 Keilhauer Ltd. Mecanisme d'inclinaison a ressort lie a l'assiette du siege
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
DE102015111946A1 (de) 2015-07-22 2017-01-26 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
IT201600071468A1 (it) * 2016-07-08 2018-01-08 Co Fe Mo Ind S R L Meccanismo di oscillazione per sedie
CN107898197B (zh) * 2017-09-22 2020-09-11 东莞致诚办公家具有限公司 具有同步调整结构的座椅
PL3556252T3 (pl) 2018-04-17 2020-11-16 L&P Property Management Company Mechanizm przechyłu dla krzesła i krzesło
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
US10702066B2 (en) * 2018-11-19 2020-07-07 Profim SP. ZO.O Office chair

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EP1537804A1 (fr) * 2003-12-06 2005-06-08 Bock 1 GmbH & Co. KG Mécanisme synchrone pour chaise de bureau
JP2008132322A (ja) * 2006-10-26 2008-06-12 Takano Co Ltd 椅子の反力調整装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220087425A1 (en) * 2020-09-18 2022-03-24 Dinkar Chellaram Synchronous-tilt reclining chair
US11690455B2 (en) * 2020-09-18 2023-07-04 Dinkar Chellaram Synchronous-tilt reclining chair

Also Published As

Publication number Publication date
US20150282620A1 (en) 2015-10-08
DE102014104870A1 (de) 2015-10-08
US9549614B2 (en) 2017-01-24
EP2926690B1 (fr) 2016-09-28

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