EP2689692A1 - Meuble d'assise, en particulier chaise de bureau - Google Patents

Meuble d'assise, en particulier chaise de bureau Download PDF

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Publication number
EP2689692A1
EP2689692A1 EP13003675.9A EP13003675A EP2689692A1 EP 2689692 A1 EP2689692 A1 EP 2689692A1 EP 13003675 A EP13003675 A EP 13003675A EP 2689692 A1 EP2689692 A1 EP 2689692A1
Authority
EP
European Patent Office
Prior art keywords
backrest
support
seating furniture
inflexible
adjusting
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
EP13003675.9A
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German (de)
English (en)
Other versions
EP2689692B1 (fr
Inventor
Christopher Schmidt
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.)
Proflm Sp Z Oo
Original Assignee
Proflm Sp Z Oo
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Publication date
Application filed by Proflm Sp Z Oo filed Critical Proflm Sp Z Oo
Priority to PL13003675T priority Critical patent/PL2689692T3/pl
Publication of EP2689692A1 publication Critical patent/EP2689692A1/fr
Application granted granted Critical
Publication of EP2689692B1 publication Critical patent/EP2689692B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • the invention is in the field of mechanics and especially in the field of furniture construction. It relates to a chair with a base part, a backrest and a backrest support. Such seating is often equipped with a synchronous mechanism for the synchronous adjustment of the seat and the backrest and designed such that a sitting position of a user is supported.
  • office chairs are manufactured for a continuous and regular use, offer an extremely high level of comfort and should support an ergonomically favorable sitting position.
  • the backrest of such an office chair can yield under force and thus allow different seating positions or dynamically support possible seating positions and position changes.
  • various principles can be applied to attach a backrest to a base member while making it movable.
  • the present invention has for its object to provide a chair of the type mentioned, the backrest is individually customizable in terms of shape.
  • a backrest support with a base part facing the lower support end and a base part facing away from the upper support end and a preferably at least partially shell-like backrest is provided which has a flexible backrest portion and an inflexible support portion.
  • the inflexible support portion is via a first (lower) pivot axis to the lower support end and the flexible Backrest portion is connected via a second (upper) pivot axis to the upper support end of the backrest support, wherein the flexible back portion extends between the second (upper) pivot axis and a transition region to the inflexible support portion.
  • an adjusting mechanism of the inflexible support portion is pivotable about the first (lower) pivot axis and consequently the distance between the second (upper) pivot axis and the transition region is adjustable, so that the backrest shape of the backrest, in particular their extending in the sagittal plane curvature in the flexible backrest section, is changed.
  • the shape of the backrest due to their flexible backrest part is particularly advantageous and in a simple manner with respect to the rigid backrest support individually adjustable or adjustable.
  • This principle of adjustability and adjustability of the backrest shape as well as the construction according to the invention are particularly advantageously applicable to an office chair, in which the base part has a seat support with a seat surface and a support frame with rollers.
  • the backrest is approximately L-shaped in side view or in a vertical longitudinal section, wherein the comparatively short, substantially horizontally extending L-leg forms the inflexible support section and the comparatively long, substantially vertically extending L-leg forms the flexible backrest section.
  • the backrest support which is preferably also approximately L-shaped, suitably has two carrier legs spaced apart from one another, between which the comparatively short L-legs of the inflexible support section of the backrest are arranged.
  • the flexible backrest section of the backrest projects beyond the backrest support on both sides in the (horizontal) transverse direction.
  • the flexible backrest section of the backrest projects beyond the second (upper) pivot axis in the (vertical) longitudinal direction. This leads to a change in the backrest shape to pivot this upper backrest section, namely to its pivoting at the back, when the arching of the flexible backrest portion extending in the sagittal plane increases as a result of pivoting of the inflexible support section and to vertical alignment as the arching decreases.
  • the sagittal plane is the plane of the chair in which the usual S-shaped curvature of the spine of a human is located, which uses the piece of furniture in the intended anatomical position in a straight, symmetrical sitting posture.
  • the sagittal plane is that plane which forms a vertically aligned plane of symmetry of the chair between the armrests.
  • the rotatable or pivotable mounting of the approximately L-shaped backrest to the backrest support is particularly easy to produce by a realization of the first and second pivot axis as a fixed bearing in the form of, for example, a rotary or pivot bearing.
  • the adjusting mechanism has an adjusting element. This is coupled in an advantageous embodiment with the inflexible support portion of the backrest and in the backrest support, in particular in a slot-like guide contour in one of the support legs (carrier-side guide contour) and there in the relatively short leg of L, out.
  • the displaceably guided in the slot-like guide contour of the backrest support adjustment is preferably a bolt or cam in turn in a subsequently also referred to as slot guide contour of the inflexible support portion of the backrest (reclining guide contour) guided adjustment.
  • the adjusting part In the course of manual actuation of the adjusting mechanism in the form of a rotary movement of an actuating element about a backrest-fixed (carrier-fixed) axis of rotation, the adjusting part is displaced along the carrier-side guide contour.
  • the bolt of the adjustment part in the reclining guide contour of the inflexible seat portion of the backrest is forcibly guided such that the inflexible support portion pivots about the first (lower) pivot axis.
  • the course of the reclining guide contour is steeper than the course of the carrier-side guide contour, in which the adjustment or the adjustment is performed.
  • the adjustment or displacement of the adjusting part and thus the bolt-like adjusting element within the carrier-fixed guide contour is carried out in an expedient embodiment by means of a shaft on the adjustment of the adjusting shaft fixed gear meshing with rack-like locking elements of the adjustment.
  • the adjustment axis is suitably formed by a polygonal (hexagonal) shaft or rod.
  • the adjusting element of the adjusting mechanism can be fixed in a number of adjustment positions.
  • the adjustment expediently has a bearing shell with spaced detent recesses.
  • This bearing shell lies in the recess-side guide contour formed as a slot-like recess.
  • the provided with the detent recesses and the bolt of the adjusting receiving bearing shell has two opposing and the slot-like guide contour for the bolt between them limiting side walls.
  • one of these side walls is elastically yielding in the opening direction of the oblong hole or slot-like guide contour.
  • this side wall can escape radially, when the bolt of the adjustment moves over the area between two locking recesses of the opposite side wall.
  • the flexibility of the resilient side wall is expediently achieved in that this side wall is not or only partially tied or formed on a rear wall-like shell portion of the bearing shell. An elastic compliance of a side wall can be ensured on the one hand by a suitable choice of the material of the bearing shell and on the other hand by constructive measures.
  • the bearing shell is provided as a separate component which is inserted into a lehen wornes slot to form the guide contour.
  • a frame of the bearing shell preferably has a circumferential reinforced edge which is substantially oval-shaped, and on which the two side walls are opposite one another on the longitudinal sides.
  • the frame may have a bottom in the installed state, the rear wall of the bearing shell forming, which stabilizes the edge and the position of the side walls against each other. If, in addition, a slot in the bottom or in the rear wall is arranged parallel to one of the side walls, this side wall becomes movable and elastically more yielding than the other, opposite side wall.
  • the two side walls should have a spacing which is smaller than the diameter of the bolt, so that it is clamped elastically between the side walls.
  • the bolt of the adjustment is then typically in the slot in each case in a detent recess rotatably mounted and is selectively transferred under the action of force from a detent recess in another. It is ensured by the elasticity of the side walls that the bolt is held in operation in a detent recess and can only be moved by additional adjustment effort from one detent recess to another.
  • the backrest has a central part and laterally attached side parts.
  • the backrest may have a curved only in the sagittal plane middle part and two each also curved in only one plane and connected to the middle part side parts.
  • both the middle part and each of the side parts can be easily produced, wherein by the interaction of central part and side parts a curved surface in several dimensions can be formed.
  • the central part and the side parts can thus together form a curved in the transverse plane contour.
  • the transverse plane is a plane perpendicular to the sagittal plane, which is aligned horizontally in the usual setup of the chair.
  • the middle part and the two side parts may be curved in the sagittal plane.
  • the backrest, d. H. whose flexible backrest section may also be arched in the transversal plane, so that the backrest or its flexible backrest section is adapted particularly advantageously to the contour of the back of a user.
  • the side parts are connected or formed with the formation of narrow gaps on the central part via, for example, comparatively thin-walled material webs. These webs are opened over part of their (vertical) length, so that two guide contours result laterally of the middle part.
  • corresponding guide elements are guided, which are connected or integrally formed on a lumbar support.
  • the lumbar support is thus manually displaceable within the guide contours in the vertical direction.
  • the lumbar support may be, for example, a part-cylindrical component whose cylinder axis is perpendicular to the sagittal plane and that at the central part of the backrest or, for example in the connecting region in each case with the middle part a side part is attached.
  • the lumbar support serves to realize a desired anatomical individual shape of the backrest, in particular in its flexible backrest region.
  • FIGS. 1 and 2 show in side view or in a rear perspective view of an office chair 1 with a base 2 with a seat 3 and a seat support 4.
  • the base 2 rests on a support frame 5 with a provided with rollers 6 carrying star 7.
  • a backrest support held with two spaced, in particular at least substantially parallel to each other, whschenkein 8a, 8b.
  • the backrest support 8 is substantially L-shaped, with its comparatively short L-leg 8c extending substantially horizontally.
  • the comparatively long L-leg 8d of the backrest support 8 extends substantially vertically and holds the leg end side, ie at the upper support end 10b, a backrest 9, while the backrest support 8a extends with the lower support end 10a below the seat surface 3 to the base part 2, to the backrest support 8 is held.
  • the backrest 9 extends with an upper backrest portion 9a beyond the upper support end 10b of the backrest support 8.
  • the as well as the seat 3 covered with a cushion 11 backrest 9 has a flexible backrest portion 9b and an inflexible, hereinafter referred to as a support or pivot portion backrest portion 9c, which is arranged between the comparatively short L-Schenkein 8c of the backrest support 8.
  • the flexible backrest section 9c has a curvature 12 directed towards the seat surface 3, specifically in the so-called sagittal plane, which in the plane of the paper Fig. 1 lies and the office chair 1 almost in a left and a right chair half shares.
  • the backrest 9 extends with the flexible backrest portion 9c with respect to the backrest width between two armrests 13 connected to the seat support 4 and in the vertical backrest longitudinal direction to the top of the seat 3.
  • the office chair 1 may comprise a so-called synchronous mechanism, which allows a synchronous movement of the backrest 9 and the seat surface 3 when the backrest 9 inclines from the upright position shown to a backward inclined position.
  • a handling element or operating lever 14 can be seen, which is part of an adjusting mechanism described below.
  • Rear side of the backrest 9 handling elements 15 can be seen, for the adjustment of a lumbar support 16 (FIG. Fig. 10 ), as will also be explained in more detail below.
  • the Fig. 3 to 5 show comparatively schematically the connection of the backrest 9 to the backrest support 8 with differently shaped backrest 9 and in particular different curvature or compression or extension of the flexible backrest portion 9c and the associated different tilt or pivotal position of the inflexible support portion 9c of the backrest 9.
  • the adjusting mechanism 20 is shown in principle.
  • the backrest 9 is connected via a first, lower pivot axis 17 and a second, upper pivot axis 18 to the backrest support 8.
  • the lower pivot axis 17 is in the region of the lower support end 10a of the comparatively short, the inflexible support portion 9c of the backrest 9 forming L-leg.
  • the lower pivot axis 17 is located at the leg ends of the comparatively short L-legs of both the backrest 9 and the back support 8.
  • the upper pivot axis 18 is analogous in the region of the upper support end 10b, ie at the leg end of the comparatively long L-. Leg of the backrest 9 and the backrest support 8.
  • the upper pivot axis 18 with respect to the backrest 9 at the upper end of the flexible backrest part 9b and there in the transition to the backrest portion 9a.
  • the change in the shape of the backrest 9 is effected by means of the adjusting mechanism 20, whose operation in principle from the 4 and 5 is apparent.
  • An adjusting element 21 is guided in a carrier-side guide contour 22, which is introduced as a slot in the comparatively short L-leg 8c of the back support 8.
  • the adjusting element 21 also interacts with a reclining guide contour 23, which is also introduced in the form of a slot in the inflexible support portion 9c of the backrest 9.
  • the inclination angles ⁇ 1 and ⁇ 2 of the reclining guide contour 23 and the carrier-side guide contour 22 are different, wherein the reclining guide contour 23steiler runs as the carrier-side guide contour 22.
  • the two guide contours 22, 23 based on the adjusting element 21 at an angle ⁇ 3 to each other, which corresponds to the difference between the two inclination angles ⁇ 1 and ⁇ 2 to the horizontal H.
  • the Fig. 6 to 9 show a detailed embodiment of the adjusting mechanism 20.
  • the running in the form of a bolt or cam adjusting element 21 of the adjusting mechanism 20 is formed on an elongate adjusting part 24 which is guided displaceably in the carrier-side guide contour 22 ( Fig. 9 ).
  • the adjusting member 24 cooperates with a gear or pinion 25, which sits non-rotatably on a running in the embodiment as a hexagon rod or shaft 26.
  • the Shaft 26 passes through the inflexible support portion 9c of the backrest 9 and the support leg 8a in the region of its comparatively short L-leg 8c with a shaft journal 26a, on which the actuating lever 14 is placed.
  • the external teeth of the gear 25 clamped with corresponding teeth of a rack 27 which is impressed in the adjustment part 24.
  • the adjustment mechanism 20 is self-locking.
  • an elongated bearing shell 31 is inserted into the reclining guide contour 23, the in Fig. 6 is relatively clear.
  • the bearing shell 31 has a frame with two opposite side walls 32, 33, between which a slot or a slot opening 34 is formed as a reclining side guide contour. In this sits the bolt-like adjusting element 21 of the carrier-side adjustment part 24 a.
  • One of the two side walls here the side wall 32, is provided on the inside with locking recesses 35 in which the bolt-like adjusting element 21 is clamped rests.
  • the clamping fixation is achieved in that the locking recesses 35 opposite side wall 33 of the bearing shell 31 is formed radially elastic.
  • a slot 37 is inserted between a shell rear wall 36 and the corresponding side wall 23 of the bearing shell 31. In the unloaded state, the clear width between the side walls 32 and 33 is smaller than the outer diameter of the adjusting element 21 of the adjustment 24.
  • Fig. 6 is also comparatively clear that the carrier side rotatably fixed shaft or rod 26 of the adjusting mechanism 20 comparatively large openings of the inflexible support portion 9c of the backrest 9 passes through, wherein the inside width of this leaning side opening 38 is sufficiently large compared to the outer diameter of the shaft or rod 26 ,
  • Fig. 10 Shown is the overall shape of the backrest 9 with a central part 90 and two side parts 91, 92 and with the lumbar support 16, wherein the lumbar support 16 is arranged in the region of the flexible backrest portion 9b.
  • the backrest 12 may for example consist of a bendable hard plastic and be at least partially covered with a padding.
  • Fig. 11 shows a cross section through a backrest 9 at the level of the leaning region above the lordosis support 16 in the horizontal direction, parallel to the transverse plane. It is clear that both the middle part 90 and the side parts 91, 92 of the backrest 9 are each curved in only one plane of curvature, wherein the in Fig. 8 shown arrangement of the central part 90 and the side parts 91 and 92 a total of approximated by kinking curvature of the backrest 9 in a further plane, namely the horizontal (transversal) level realized.
  • the middle part 90 and the side parts 91, 92 are, for example, glued together, shed, welded or preferably connected to one another by material webs 41, 42, for example in the manner of film hinges, in their respective joining regions 39, 40.
  • material webs 41, 42 for example in the manner of film hinges, in their respective joining regions 39, 40.
  • Fig. 12 shows in a perspective rear view of the central region of the flexible backrest portion 9b of the backrest 9 with the side parts 91, 92 and the middle part 90.
  • the lordosis support 16, not shown, extending across a portion of the first side part 91, the entire central part 90 and a total Part of the second side part 92 extends, is by means of pin-like projections 41 ( Fig. 10 ) in guide grooves 42 ( Fig. 12 ) guided and held, which are introduced into the web-like joining areas 39, 40.
EP13003675.9A 2012-07-26 2013-07-22 Meuble d'assise, en particulier chaise de bureau Active EP2689692B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13003675T PL2689692T3 (pl) 2012-07-26 2013-07-22 Mebel do siedzenia, zwłaszcza krzesło biurowe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202012007254U DE202012007254U1 (de) 2012-07-26 2012-07-26 Sitzmöbel, insbesondere Bürostuhl

Publications (2)

Publication Number Publication Date
EP2689692A1 true EP2689692A1 (fr) 2014-01-29
EP2689692B1 EP2689692B1 (fr) 2016-11-09

Family

ID=48874105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13003675.9A Active EP2689692B1 (fr) 2012-07-26 2013-07-22 Meuble d'assise, en particulier chaise de bureau

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EP (1) EP2689692B1 (fr)
DE (1) DE202012007254U1 (fr)
PL (1) PL2689692T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD952385S1 (en) * 2020-07-17 2022-05-24 Zhejiang Yuyue Furniture Co., Ltd. Chair part
USD990186S1 (en) * 2020-07-17 2023-06-27 Zhejiang Yuyue Furniture Co., Ltd. Chair part

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030151287A1 (en) * 2002-02-08 2003-08-14 Kokuyoco., Ltd. Chair
US20050275263A1 (en) * 2004-06-10 2005-12-15 Norman Christopher J Back construction with flexible lumbar
US20080179930A1 (en) * 2007-01-29 2008-07-31 Alexander Petrie Harley Adjustable lumbar support for a chair back
US20120025575A1 (en) * 2010-07-30 2012-02-02 Peter Lin Chair

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69600161T2 (de) * 1996-06-28 1998-09-17 Steelcase Strafor Sa Verbesserungen für Systeme mit differentieller Formung von Rückenlehnen von Bürostühlen
DE102004012850B4 (de) * 2003-10-01 2005-08-11 Leopold Schlosser Rückenlehne für eine Sitzvorrichtung, insbesondere für einen Drehstuhl
DE202005019654U1 (de) * 2005-12-16 2007-04-26 König + Neurath AG Rückenlehne und Stuhl
DE202006016045U1 (de) * 2006-10-17 2008-05-08 Sander, Armin Sitzmöbel, insbesondere Bürostuhl
DE102008036130B4 (de) * 2008-08-01 2014-12-18 Sedus Stoll Ag Neigbare Rückenlehne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030151287A1 (en) * 2002-02-08 2003-08-14 Kokuyoco., Ltd. Chair
US20050275263A1 (en) * 2004-06-10 2005-12-15 Norman Christopher J Back construction with flexible lumbar
US20080179930A1 (en) * 2007-01-29 2008-07-31 Alexander Petrie Harley Adjustable lumbar support for a chair back
US20120025575A1 (en) * 2010-07-30 2012-02-02 Peter Lin Chair

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD952385S1 (en) * 2020-07-17 2022-05-24 Zhejiang Yuyue Furniture Co., Ltd. Chair part
USD990186S1 (en) * 2020-07-17 2023-06-27 Zhejiang Yuyue Furniture Co., Ltd. Chair part

Also Published As

Publication number Publication date
PL2689692T3 (pl) 2017-05-31
DE202012007254U1 (de) 2013-10-28
EP2689692B1 (fr) 2016-11-09

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