EP1971245A1 - Mecanisme a contact permanent - Google Patents

Mecanisme a contact permanent

Info

Publication number
EP1971245A1
EP1971245A1 EP06706217A EP06706217A EP1971245A1 EP 1971245 A1 EP1971245 A1 EP 1971245A1 EP 06706217 A EP06706217 A EP 06706217A EP 06706217 A EP06706217 A EP 06706217A EP 1971245 A1 EP1971245 A1 EP 1971245A1
Authority
EP
European Patent Office
Prior art keywords
backrest support
contact mechanism
seat frame
permanent contact
permanent
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
EP06706217A
Other languages
German (de)
English (en)
Other versions
EP1971245B1 (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 EP1971245A1 publication Critical patent/EP1971245A1/fr
Application granted granted Critical
Publication of EP1971245B1 publication Critical patent/EP1971245B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • 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
    • 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
    • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
    • 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
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
    • 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
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
    • A47C7/444—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs of torsion type

Definitions

  • the invention relates to a permanent contact mechanism for an office chair or the like.
  • Permanent contact mechanisms which are also referred to as asynchronous mechanisms, are characterized in that a backrest is movably connected to a fixed seat.
  • the backrest follows the movements of the seated person from a front (upright) to a back ("lying") position, and vice versa, thus promoting and supporting frequently changing sitting positions, which are due to orthopedic reasons, inter alia because of the associated mutual stress on the intervertebral discs. are desired.
  • An object of the present invention is to provide a relatively flat-type permanent contact mechanism.
  • the object is achieved by a permanent contact mechanism according to claim 1.
  • a permanent contact mechanism is provided with a placeable on a chair column seat frame, with a pivotable about a transverse axis on the seat frame backrest support, with at least one spring-loaded orsfedernden lever element which interacts with the backrest support such that a pivoting of the backrest support is always against a spring force wherein the position of the fulcrum of the lever member is different from the position of the transverse axis.
  • a basic idea of the invention is the positioning of the lever fulcrum of the backrest support acting on the lever element on the one hand and the position of the transverse axis about which the backrest support is 29enkbar, on the other hand.
  • Another basic idea of the invention is to provide a Federkrafseingna too without a (pre) tensioning of a spring element must be done.
  • a particularly light, "powerless" spring force adjustment is realized.
  • Fig. 6 is a Pertnanent Membershipmechanik in one
  • 7 is a schematic representation of the position of the contact slide in a rear position
  • 8 shows a schematic representation of the position of the contact slider in a front position
  • FIG. 9 shows a permanent contact mechanism in a sectional view along the line IX-IX in FIG.
  • Fig. 11 is a permanent contact mechanism in one
  • Fig. 12 is a permanent contact mechanism in one
  • Fig. 13 is a permanent contact mechanism in one
  • Fig. 14 is a permanent contact mechanism in one
  • the embodiment shows a permanent contact mechanism 1 for an office chair or the like, with a means of a Konusauf ⁇ ahme 2 on the upper end of a chair column (not shown) placeable, fixed, ie non-movable sentence frame 3 and with a mounted on the seat frame 3 seat plate 4, which forms a housing for the actual pivoting mechanism together with the seat frame 3, see. Fig. 1.
  • the seat plate 4 extends well beyond the front edge 5 of the seat frame 3 addition.
  • the seat frame is preferably made of a glass fiber reinforced plastic material CPaSGfSO), while the seat plate is made of polypropylene.
  • the permanent contact mechanism 1 comprises a about a transverse pivot axis 6 pivotally mounted on the seat frame 3, in plan view forked backrest support 7, the cheeks 8 are arranged on both sides of the seat frame 3.
  • the seat plate 4 On the seat plate 4, the seat is provided with a padded seat mounted, alternatively, instead of the seat plate 4 and a seat support or the like, the seat frame 3 close up (both not shown).
  • the entire permanent contact mechanism 1 is mirror-symmetrically constructed with respect to a central longitudinal plane M (cf. FIG. 4), which relates to the actual kinematics.
  • a central longitudinal plane M cf. FIG. 4
  • the Backrest 9 can in other words perform a pendulum motion. This serves to effectively avoid lordosis separation. In other words, a permanent contact of the Lordosen Scheme.es of the seated with the backrest 9 is effected.
  • This pivoting mechanism for the backrest 9 preferably also includes a spring element (not shown) for returning the backrest 9 to its normal position as soon as the sitting person stands up. For the execution of the pendulum movement, therefore, the sitter must overcome a certain spring force.
  • the backrest is preferably made of plastic (passport).
  • the backrest support 7 is connected to the front end 13 of his cheek 8, which starting from a horizontally extending cheek main element 14 starting approximately in the area of
  • Konus explanation 2 extends obliquely upwards, hingedly connected to the seat frame 3.
  • a the two cheeks ß connecting, hollow cross member 15 in provided on both sides of the seat frame 3 U-shaped recesses 16 and is held there by arranged in the interior of the seat frame 3 and from above mountable counterparts 17 with also U-shaped recesses 18 , see. Fig. 4, whereby a pivot bearing for the Stud ⁇ kenlehenitati 7 is formed.
  • the backrest support 7 can be pivoted in accordance with the constructive edge parameters in a position which effectively minimizes the so-called "shirt pull-out effect.”
  • the pivot axis 6 is not arranged directly below the actual hip pivot point of the seated person but is opposite the actual hip pivot point in the direction of the front edge 5 the seat frame 3.
  • the pivot axis 6 is seen in the longitudinal direction 19 before the Konusaufnähme 2, so offset from the Konusaufnähme 2 in the direction of the seat leading edge 21.
  • the pivot axis 6 is in the immediate vicinity of the seat frame 3 final seat plate. 4
  • the transverse strut 15 as an integral part of the backrest support 7 is integrally connected to a detent plate 22 which extends in the direction of the trailing edge 23 of the seat frame 3 and at least whose underside 24 extends parallel to the cheek main elements 14.
  • This locking plate 22 performs each movement of the backrest support 7 in the pivoting direction 25 and thereby moves inside the seat frame 3.
  • the backrest support 7 with all its components (locking plate 22, ...) is preferably made of Pa6Gf30.
  • a spring arrangement is provided with two leg springs 27 which are aligned with one another in the transverse direction 26. These are torsion springs with two legs each.
  • the shorter fixed legs 28 have in
  • the longer free leg 32 points in the direction of the trailing edge 23 of the seat frame 3. It is supported on a contact slider 33 described in more detail below, which is in mechanical interaction with the detent plate 22.
  • the torsion springs 27 themselves lie in prisms 34 provided for this purpose, which are designed as part of the seat frame 3.
  • the torsion springs 27 thus form lever elements which cooperate with the istlehneixarna 7 such that a movement of the backrest support 7 in the pivoting direction 25 always against the spring force of the torsion springs 27 takes place.
  • the two legs (fixed leg 28 and free leg 32) act as lever arms.
  • the centers 35 of the leg springs 27 form the fulcrums of the lever elements and are spaced from the position of the pivot axis 6.
  • Swivel axis 6 are, see. 10 to 15. This arrangement allows a very low overall height of the permanent contact mechanism 8 and at the same time a sufficient adjustment of the backrest support and thus represents an optimal middle path between height and adjustment.
  • the contact slide 33 arranged centrally in the seat frame 3 is substantially T-shaped and is preferably made of plastic (Pa6). On the lower sides 37 of its two T-legs 38 extending in the transverse direction 26 In each case, it has a U-shaped groove 39 extending in the longitudinal direction 19. In these grooves 39 are the free legs 32 of the torsion springs 27 a. The free legs 32 of the leg springs 27 are supported in other words on the T-legs 38 of the contact slide 33 from.
  • a rack 43 is fixed, which cooperates with a gear 44 to form a rack and pinion.
  • the gear 44 is disposed in a recess provided therefor 45 of the cross member 15 and mounted on a shaft 46 which extends in the interior of the cross member 15 and at the same time serves as a pivot axis 6 for the backrest support 7.
  • an actuating element ⁇ not shown) is attached to one end of the shaft 46, for example a handwheel.
  • the upper side 47 of the contact slider 33 interacts with the underside 24 of the detent plate 22 as follows: At the point where the two T-legs 38 of the contact slide 33 abut each other, ie in a central position, there is a parallelepiped, from the upper side 47 above in the direction of detent plate 22 and seat plate 4 protruding block 48, which is preferably integrally connected to the contact slide 33 for reasons of better mechanical strength and resilience.
  • a number of locking elements 49 is provided on the upper side 47 of the contact slide 33. These are evenly spaced, tooth-like, arranged in Querri ⁇ htung 26 latching steps. These extend in the direction of the free ends 51 of the T-S ⁇ henkel 38 to about the middle of the T-legs 38, so that the top sides 52 of the T-leg 38 in the region of their free ends 51 are free of locking elements 49 and according to the selected material have smooth surfaces.
  • the underside 24 of the detent plate 22 has a center in the longitudinal direction 19 extending rectangular opening 53. On both sides of the opening 53 extend in the longitudinal direction 19 in turn a number of locking elements 54. These are formed as counter-elements to the locking elements 49 on the upper side 47 of the contact slide 33. On both sides of the locking elements 54, that is on the lateral edge regions 55 of the underside 24 of the detent plate 22, the surface is again in accordance with the selected material smooth.
  • Contact slide 33 and detent plate 22 are arranged to each other such that the arranged on the upper side 47 of the contact slide 33 block 48, the detent plate 22 never touches, but always in the region of the rectangular opening 53 is arranged.
  • the contact sliders 33 are in the direction of the trailing edge 23 of the seat frame 3 acting force components of the torsion springs 27 greater than the frictional forces between the smooth surfaces on the top 47 of the contact slide 33 and the bottom 24 of the detent plate 22.
  • the locking elements 49, 54 of contact slide 33 and detent plate 22 in this position into one another interlocked and thereby form a self-holding Rastgesperre, cf. Pig. 7 and 10.
  • the shear forces can be absorbed, whereby the mechanical stability of the construction is ensured at a pivoted backrest support 7.
  • the smooth outer regions 56 of the T-legs 38 of the contact slide 33 abut against the smooth edge regions 55 of the latching plate underside 24.
  • Backrest support 7 of the block 48 rests freely in the rectangular opening 53 and the bottom 57 of the seat plate 4 is not touched.
  • the distance 58 between the block 48 and the underside 57 of the seat plate 4 decreases more and more until the block 48 rests against the seat plate 4 Bottom 57 of the seat plate 4 is formed accordingly.
  • the block 48 abuts against the immovable seat plate 4. This causes - since, the contact slide 33 with the free ends 51 of its T-leg 38 at. the free legs 32 of the torsion springs 27 is supported - a bending of the contact slide 33 in the head area, ie in the region of the T-leg 38. The contact slide 33 is further deflected the farther the backrest support 7 is pivoted back with its contact plate 22.
  • blocking wedges 59 which are arranged in the interior of the seat frame 3 to a blocking device 60 and can be pivoted in the pivoting direction 61 from a rest position to a blocking position in which they attack with their free ends 62 on the bottom 24 of the locking plate 22 and pivoting the detent plate 22 and thus pivoting the Prevent backrest support 7.
  • the blocking wedges 59 can be actuated by means of an actuating element, not shown, from outside the seat frame 3.
  • a fastening for a Bowden cable is provided on the blocking device 60, with the aid of which
  • Blocking device can be pivoted throughout.
  • the gear 44 is actuated, whereby a change in position of the contact slide 33 in the longitudinal direction 19 takes place.
  • the Federkrafteinsander now according to the invention "powerless”, namely such that by changing the position of the pivot points 63 of the free leg 32 of the torsion springs 27 on the locking plate 33 of the backrest support 7, the length of the effective lever arm - ie the smallest, ie vertical Abb stand between the Line of action of the spring force and the pivot point 3B - is changeable without working against the spring force of Leg springs 27 must be performed. This is a particularly light spring force adjustment possible.
  • the permanent contact mechanism can be set to "lighter” or "harder".
  • a "light” setting (as shown in Figs. 4, 5, 9, 10, 11 and 12)
  • the articulation points 63 in the grooves 39 on the T-legs 38 by means of the rack and pinion gear towards the free ends 64 of the free Legs 32 of the torsion springs 27 au shifted so that comparatively long lever arms result in.
  • the in the pivoted state (see Fig. 12) acting on the contact slide 33 towards the rear edge 23 of the seat frame 3 force components of the torsion springs 27 are comparatively small.
  • a permanent contact mechanism 1 having an extremely flat shape is provided. This is achieved essentially by the inventive separation of the position of the pivot point 35 of the torsion springs 27 from the position of the pivot axis 6 of the backrest support 7.
  • a self-resilient lever element such as the leg spring 27 used here
  • other constructive arrangements can of course be used to achieve the function according to the invention.
  • non-resilient construction parts as
  • Lever elements are used, which are acted upon by a spring, such as a tension or compression spring.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

L'invention concerne un mécanisme (1) à contact permanent pour chaise de bureau ou similaires. Pour obtenir un mécanisme à contact permanent (1) de structure relativement plate, on propose de doter ce mécanisme d'un cadre d'assise (3) qui peut être placé sur une colonne de chaise, d'un support de dossier (7) disposé sur le cadre de siège (3) de manière à pouvoir pivoter autour d'un axe transversal (6) et d'au moins un élément de levier (27) intrinsèquement élastique ou sollicité par ressort et qui coopère avec le support de dossier (7) de manière à permettre au support de dossier (7) de toujours pivoter en opposition à une force élastique. La position du centre de rotation (35) de l'élément de levier (27) est différente de la position de l'axe transversal (6).
EP06706217A 2006-01-12 2006-01-12 Mecanisme a contact permanent Expired - Fee Related EP1971245B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/EP2006/000249 WO2007087817A1 (fr) 2006-01-12 2006-01-12 Mecanisme a contact permanent
DE202006000491U DE202006000491U1 (de) 2006-01-12 2006-01-12 Permanentkontaktmechanik

Publications (2)

Publication Number Publication Date
EP1971245A1 true EP1971245A1 (fr) 2008-09-24
EP1971245B1 EP1971245B1 (fr) 2012-01-18

Family

ID=42260300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06706217A Expired - Fee Related EP1971245B1 (fr) 2006-01-12 2006-01-12 Mecanisme a contact permanent

Country Status (6)

Country Link
US (1) US7866750B2 (fr)
EP (1) EP1971245B1 (fr)
JP (1) JP2009523042A (fr)
CN (1) CN101370408A (fr)
DE (1) DE202006000491U1 (fr)
WO (1) WO2007087817A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108348072A (zh) * 2015-10-15 2018-07-31 高飞模工业有限责任公司 用于椅子的摆动机构

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CN102098945B (zh) 2008-05-02 2013-11-06 霍沃思公司 用于重力响应式椅子的张力机构
DE102008042973B3 (de) * 2008-10-20 2010-01-07 Sedus Stoll Ag Vorrichtung zur Sitzneigungsverstellung und Stuhl
EP2345345A1 (fr) * 2010-01-15 2011-07-20 Pro-Cord S.p.A. Chaise dotée d'un dossier inclinable
EP2347676B1 (fr) * 2010-01-22 2012-08-22 Stoll Giroflex AG Structure porteuse pour un élément de dossier et/ou un siège d'un dispositif d'assise et dispositif d'assise doté d'une telle structure porteuse
CN201641140U (zh) * 2010-01-29 2010-11-24 陈育成 一种改进结构的座椅底盘
DE202013100574U1 (de) * 2013-02-07 2014-05-08 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
DE202014100062U1 (de) * 2014-01-08 2015-04-10 Innotec Motion GmbH Sitzmöbel mit federnder Rückenlehne
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
USD851418S1 (en) 2017-05-25 2019-06-18 Steelcase Inc. Seating arrangement
USD852526S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851417S1 (en) 2017-05-25 2019-06-18 Steelcase Inc. Seating arrangement
USD852525S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD827352S1 (en) 2017-05-25 2018-09-04 Steelcase Inc. Seating arrangement
USD846294S1 (en) 2017-05-25 2019-04-23 Steelcase Inc. Seating arrangement
USD852524S1 (en) 2017-05-25 2019-07-02 Steelcase Inc. Seating arrangement
USD851952S1 (en) 2017-05-25 2019-06-25 Steelcase Inc. Seating arrangement
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
CN209018141U (zh) * 2018-05-11 2019-06-25 杭州中泰实业集团有限公司 一种改变扭簧角度的螺旋调节转椅托盘
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DE102019107745A1 (de) * 2019-03-26 2020-10-01 Bock 1 Gmbh & Co. Kg Wippmechanik für einen Stuhl, insbesondere Bürostuhl
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USD907383S1 (en) 2019-05-31 2021-01-12 Steelcase Inc. Chair with upholstered back
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CN114451807A (zh) * 2020-11-10 2022-05-10 创科无线普通合伙 清扫组件、清洁设备以及用于清洁设备的方法

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN108348072A (zh) * 2015-10-15 2018-07-31 高飞模工业有限责任公司 用于椅子的摆动机构
CN108348072B (zh) * 2015-10-15 2021-02-09 高飞模工业有限责任公司 用于椅子的摆动机构

Also Published As

Publication number Publication date
US20090066134A1 (en) 2009-03-12
JP2009523042A (ja) 2009-06-18
WO2007087817A1 (fr) 2007-08-09
EP1971245B1 (fr) 2012-01-18
DE202006000491U1 (de) 2006-04-20
US7866750B2 (en) 2011-01-11
CN101370408A (zh) 2009-02-18

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