EP3085277A1 - Siège de bureau - Google Patents

Siège de bureau Download PDF

Info

Publication number
EP3085277A1
EP3085277A1 EP15001157.5A EP15001157A EP3085277A1 EP 3085277 A1 EP3085277 A1 EP 3085277A1 EP 15001157 A EP15001157 A EP 15001157A EP 3085277 A1 EP3085277 A1 EP 3085277A1
Authority
EP
European Patent Office
Prior art keywords
support
office chair
chair according
frame
backrest
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
EP15001157.5A
Other languages
German (de)
English (en)
Other versions
EP3085277B1 (fr
Inventor
Axel Thallemer
Lorenz Christoph Bauer
Lara Sophie Strauss
Benjamin Christoph Greimel
Patrick Krassnitzer
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.)
Festo SE and Co KG
Original Assignee
Festo SE 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 Festo SE and Co KG filed Critical Festo SE and Co KG
Priority to EP15001157.5A priority Critical patent/EP3085277B1/fr
Publication of EP3085277A1 publication Critical patent/EP3085277A1/fr
Application granted granted Critical
Publication of EP3085277B1 publication Critical patent/EP3085277B1/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
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
    • A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs
    • 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
    • A47C7/405—Support for the head or the back for the back with double backrests

Definitions

  • the invention relates to an office chair with a seat and a backrest, wherein the seat mounted on or on a frame and the backrest are connected to the seat, and the backrest has a support column on which transverse support members are provided and the support column a front support wall and a rear support wall between which front-to-back extending flat ribs extend elastically tiltably attached to the front and rear support walls, and the two support walls approach from bottom to top.
  • Office chairs with backrests are known in various embodiments.
  • An office chair with support structure in the backrest is made of US 6,986,549 B2 known.
  • the support structure is formed by a kind of spine or support column having front and rear support walls. Between the two support walls are substantially horizontally extending, flat ribs that hold the support walls at more or less large distance.
  • the ribs are connected by joints with the inner surfaces of the two supporting walls and can tilt with respect to these.
  • a flexible wedge is known which is used in a backrest (FIG. 20).
  • From the DE 10 2011 117 672 B4 is a backrest for a chair known, having a plurality of the back of a user partially embracing support elements. Such a chair is used, for example, for people restricted in freedom of movement.
  • the invention has for its object to provide an office chair of the type mentioned, in which the backrest conforms to the back of a user and the backrest in the neck and the loin of the user is still free to move.
  • the backrest is supported over almost its entire height, but the upper and the lower end of the backrest are not supported by the support column.
  • the unsupported upper and lower portions of the seat back protrude in the manner of wings over the supported central area and may extend the direction of the adjoining portions or may consciously occupy a different inclination by the user.
  • the support column over its vertical extent to a constant width.
  • This width can be chosen freely and can be as wide as the width of the backrest. But it may also have a smaller width than the backrest, for example, a width of 15% to 30%, in particular of 20% of the total width of the backrest.
  • a preferred embodiment of the invention provides that both support walls are convexly inclined in the direction of a user.
  • the support column with its two support walls thus inclines in the unloaded state with its upper and lower areas away from the user. If the support column is deformed during leaning in its central region, i. pressed slightly, then the upper portion tilts against the neck or head of the user.
  • ribs connecting the front to the rear support wall orthogonally open into the front and / or the rear support wall.
  • the connection of rib and support wall is rigid so that a tilt, position or direction change of the front support wall is transmitted to one or more ribs, which then transfer their inclination, position or direction change to the rear support wall, which then correspondingly adjusts and optionally adjacent ribs influenced, which in turn act on the front support wall and deform it, especially in the head area.
  • rear support elements are arranged side by side, ie above one another, from bottom to top on the outer surface of the rear support wall and along the support wall.
  • the plurality of rear support elements are located on the back of a frame surrounding the support column for the backrest. These rear support elements extend over the entire width of the backrest and connect the frame to the support column.
  • the frame and the support column thus form a unit that over the support elements exchange inclination and support forces with each other.
  • the plurality of rear support elements In order to change the curvature and inclination angle of the backrest, the plurality of rear support elements at a distance from each other.
  • the frame is relatively flexible in the areas between the individual support elements, so that it is slightly bent there, i. can be deformed in the vertical. The frame can thus follow the course of the support column and thus the back course of a user.
  • the plurality of rear support elements taper from the edge in the direction of the support column, in particular whose height is reduced.
  • the taper which can be done in a reduction in thickness and / or height, causes the support members to be relatively rigid at their edges to which they are connected to the frame, with the central region with which they contact abut the support column and / or are connected to this, are relatively elastic.
  • the support elements can thus bulge out of the plane of the backrest, wherein the vaulting or tilting forces are transmitted to the frame depending on the elasticity of the support elements more or less.
  • a plurality of front support members are arranged side by side on the outer surface of the front support wall and along the support wall from bottom to top.
  • the front and rear support elements on the support pillar at the front and at the rear ensure that areas of the backrest are directed to the rear and other areas to the front, ie towards the front of the user, with the individual areas interacting with each other.
  • the plurality of front support elements are on the back of a support frame surrounding the frame for the backrest and preferably have a distance from each other.
  • the front and rear support elements are flexible and can be made of steel, especially spring steel, wood, carbon and / or plastic.
  • the front and rear support elements extend at the level of the ribs, which then extend between the respective front and rear support member.
  • the frame and the front support elements are covered by a padding or covering.
  • This covering can be of any type, shape and color.
  • the office chair has a frame independent of the frame.
  • the frame can therefore be designed as desired and have the rigidity required for an office chair.
  • a height adjustment can be accommodated, which can be additionally equipped with a suspension and a damping.
  • this gas springs are used.
  • the elastic element is thus formed by the frame, which serves as a support for the seat and the backrest.
  • the Office chair according to the invention thus represents a cantilever.
  • the frame has two support legs. These support legs form the supports for the seat and the holder for the backrest.
  • any types and shapes of the seat and the backrest can be mounted on the support and the bracket. They can be rigid or flexible and possibly also damped and mounted or secured in different positions on the support and the bracket.
  • An embodiment of the invention provides that the support legs are connected together at their lower ends.
  • the ends of the support legs can be connected directly or indirectly. In any case, they form a rigid framework and a support base for the frame on which the seat and back support.
  • the frame is a self-supporting unit that is rigid in sections and flexible in other areas.
  • a cross member is provided for connecting the lower ends of the support legs, in addition, a bridge may be present.
  • the cross member serves as a point of articulation for the upper end of the Gestell and may also have a rotating and / or tilting bearing for the frame, so that it can be adjusted relative to the frame with different angles of inclination.
  • each support leg extends from the frame in the direction of the backrest extending foot, a to the foot adjoining and in the direction of the front edge of the seat extending spring portion, a subsequent to the spring portion and in the direction of the backrest extending and receiving the seat supporting portion and a subsequent to the support portion and the backrest supporting back portion has.
  • the frame thus has a foot connected to the frame, which is followed by a spring section, a support section and finally a rear section.
  • a particularly preferred variant provides that the frame, in particular the foot and the sections, are cut out of a plate, in particular by means of a laser cutting device, and then folded.
  • a laser high precision finish cuts can be made without overheating the area around the cut and component.
  • the cut-out semi-finished elements can be stored in a space-saving manner and then fed to the bending device. Both the cutting and bending processes can be automated as far as possible.
  • damping elements In order to give the office chair, in addition to its rigidity, a degree of flexibility and impact absorption, the supporting legs are supported by damping elements. These damping elements transmit the impact forces directly or indirectly into the frame. Thus, the characteristics of a cantilever can be combined with the advantages of a certain damping.
  • the damping elements are supported on the cross member or on the bridge.
  • the forces are thus supported directly on or in the immediate vicinity of the frame. Occurring bending elements within the frame therefore remain minimal.
  • the support legs are connected to each other by means of a cross strut, in particular below the seat.
  • the support legs remain in exactly the desired distance from one another and transverse forces do not have to be transmitted through the seat or the fasteners required for this purpose.
  • the damping elements are supported on the cross brace. Due to the optimal placement of the cross brace on the support legs and a freely selectable position for the damping elements they can be aligned exactly in the direction of the forces occurring.
  • a high rigidity on the one hand and compliance in the elastic portions of the entire office chair on the other hand is achieved in that the frame made of metal, in particular spring steel.
  • the use of spring steel gives the office chair the characteristics of a cantilever, the office chair also has a rigid frame with suspension and damping and the height adjustment by the Gevier.
  • the frame with one or more beads and / or Leksabkantitch Mistake.
  • these rigid areas can be specifically excluded from the suspension.
  • a further decoupling of seat and frame is achieved in that the seat by means of several dampers, in particular rubber buffer, is attached to the frame.
  • dampers in particular rubber buffer
  • FIG. 1 shows a perspective view of an office chair 10 generally designated, which has a telescopic frame 12 with a foot turnstile 14, a seat 16 and a backrest 18.
  • the frame 12 is connected via a frame 20 both to the seat 16 and to the backrest 18.
  • the lower end 22 of the frame 20 is rotatably and / or tiltably adjustable and / or lockable mounted on the upper end of the frame 12.
  • the seat 16 and the backrest 18 have a covering 24 or padding.
  • FIG. 2 essentially shows the back of the backrest 18, the longitudinal sides and at the top Transverse termination of the frame 20 is surrounded.
  • the frame 20 has two support legs 26, they strip-shaped or band-shaped below the backrest 18 extend.
  • a support column 28 extends, which extends substantially parallel to the support legs 26.
  • the two support legs 26 are detected by a plurality of rear support members 30, wherein the support members 30 have a distance from each other and are tapered in its central region 32 against which the support column 28, by the upper edge 34 in the direction of the straight, horizontally extending lower Edge 36 is cut.
  • the support column 28 has to the upper end of the backrest 18 and to the lower end a distance of 10% to 20%, in particular of 15%, the total height of the backrest 18th
  • FIG. 3 shows a perspective view of the support column 28 having a front support wall 38 and a rear support wall 40, between which ribs 42 extend.
  • the two support walls 38 and 40 both extend convexly, the convex curvature facing a back of a user of the office chair 10, ie facing forwards.
  • the ribs 42 keep the two support walls 38 and 40 at a distance, wherein the distance decreases from bottom to top, so that the support walls 38 and 40 touch with its upper end.
  • the ribs 42 are rigidly connected to the inner sides of the support walls 38 and 40 and project from the inner wall of the rear support wall 40 orthogonal. In addition, the ribs 42 at constant distances from each other.
  • FIG. 4a a section of a carrying leg 26 is shown, this having alternately thickened portions 44 and tapered portions 46 has.
  • the rear support members 30 are fixed, the thickness of which is sized to have the same cross section as the thickened portions 44, which is apparent from the FIG. 4b is apparent.
  • the Figure 4c shows a cross section IVc - IVc (according to Figures 2 and 4b ) and there are a portion 46, the end of a rear support member 30 and hinted also the end of a front support member 48 recognizable.
  • the rear support member 30 partially surrounds the tapered portions 46 and has a dovetail groove 50 at the forward broad side of the tapered portion 46. In this dovetail groove 50 engages a dovetail spring 52 of the front support member 48, which is thereby connected to the rear support member 30.
  • FIG. 5 shows the seat 16 and the backrest 18 of the office chair 10 from the front, with the covering 24 has been removed. It can be seen that both the rear support element 30 and the front support elements 48, of which only the lowermost is shown, engage behind the support legs 26 on which they are mounted. If the front support element 48 is acted upon in the direction of the support column 28, then the support column 28 is deformed. The support column 28 is supported on the one or more rear support members 30, which in turn are deformed. However, deformation of the support column 28 causes such that adjacent portions of the support column 28 are bulged toward the user, whereby one or more of the front support members 48 are displaced in the direction of the user. The back of a user is optimal supported and the backrest 18 adapted to the course of the back of the user.
  • FIG. 6 shows a side view of a second embodiment of the office chair 10, which also has a telescopic frame 12 with a foot turnstile 14, a seat 16 and a backrest 18.
  • the frame 12 is connected via the frame 20 both to the seat 16 and to the backrest 18.
  • the lower end 22 of the frame 20 is rotatably and / or tiltably adjustable and / or lockable mounted on the upper end of the frame 12.
  • the seat 16 has a seat cushion 74 and the seat back 18 has a back pad 76, with the front end 78 of the seat pad 74 following the frame 20 downwardly and supporting the user's knees.
  • FIG. 7 shows essentially the frame 20, which has, inter alia, the two support legs 26, they strip-shaped or band-shaped below the seat 16 and behind the backrest 18 extend.
  • the support legs 26 are formed by a foot 82, a spring portion 84, a support portion 86 and a back portion 88.
  • the foot 82 and the individual sections 84 to 88 are strip-shaped or band-shaped cut and folded several times, ie provided with folds 90, 92, 94 and 96.
  • FIG. 8 showing substantially the rear view of the frame 20 and the support legs 26, it can be seen that at each support leg 26, the lower end 22 of the foot 32 is bent over the fold 96 vertically upwards and has a mounting plate 98.
  • the opposite support leg 26, which is formed mirror-symmetrically, So also has a mounting plate 98, so that the mounting plates 98 face each other.
  • a cross member 100 is welded by means of a laser welding device and forms the receptacle for the upper end of the frame 12.
  • a bridge 104 which serves as a support bearing 106 for two damping elements 108 serves.
  • damping elements 58 engage on a transverse strut 110, which connect the two support portions 86 of the two support legs 26, which is explained in more detail below, among other things.
  • FIG. 9 shows the frame 20 from the front and it can be seen that at the lower end 22 of the frame 20, the two mounting plates 98 are relatively close to each other and are supported by the cross member 100.
  • the distance of the feet 82 increases toward the rear, being about the fold 90, the distances between the two spring portions 84 forward again increased up to the distance of the two support sections 86.
  • the support portions 86 are provided in the rear third of the cross member 110, wherein between the cross member 110 and the support portions 86 damper 112, in particular rubber buffer, interposed, ie screwed.
  • two damper 118 are still screwed on the top of the support portions 86 at the front and at the rear end.
  • FIG. 10 shows the seat 16, which is formed deep-drawn shell-shaped, at its side edges upwardly bent pad strips 120 and is open like a blade like a forward.
  • the seat cushion 24 are mounted, in particular be clipped, being held laterally from the pad strips 120, wherein the front end 28 of the seat cushion 24 follows the frame 20 along the fold 92 down.
  • the seat 16 is screwed by means of the damper 118 to the support portions 86 and holds the support portions 86 at a distance and stiffened.
  • the two feet 82 and the support portions 86 are relatively stiff due to the cross member 102 and the bridge 104 and the bolted seat 16 and the cross member 110, whereas the two spring portions 84 are resilient over the entire length and give the Rahen 20 the feature of a cantilever. This also applies in part to the back sections 88, wherein the lower region thereof is elastic, but its upper region is fastened to the backrest 18. The backrest 18 can thus perform low tilting tendencies to the rear.

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  • Chairs Characterized By Structure (AREA)
EP15001157.5A 2015-04-20 2015-04-20 Siège de bureau Active EP3085277B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15001157.5A EP3085277B1 (fr) 2015-04-20 2015-04-20 Siège de bureau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15001157.5A EP3085277B1 (fr) 2015-04-20 2015-04-20 Siège de bureau

Publications (2)

Publication Number Publication Date
EP3085277A1 true EP3085277A1 (fr) 2016-10-26
EP3085277B1 EP3085277B1 (fr) 2017-07-26

Family

ID=52991436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15001157.5A Active EP3085277B1 (fr) 2015-04-20 2015-04-20 Siège de bureau

Country Status (1)

Country Link
EP (1) EP3085277B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916411A1 (de) 1999-04-01 2000-11-16 Leif Kniese Dynamischer Hebel zur Verbesserung der Kraftübertragung
US6986549B2 (en) 2003-03-19 2006-01-17 Leif Kniese Seating element
EP1693248A2 (fr) * 2005-02-16 2006-08-23 Volker Wilhelm Eysing Élément de support
DE102011117672B4 (de) 2011-09-19 2013-07-11 Otto Bock Mobility Solutions Gmbh Rückenlehne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916411A1 (de) 1999-04-01 2000-11-16 Leif Kniese Dynamischer Hebel zur Verbesserung der Kraftübertragung
US6986549B2 (en) 2003-03-19 2006-01-17 Leif Kniese Seating element
EP1693248A2 (fr) * 2005-02-16 2006-08-23 Volker Wilhelm Eysing Élément de support
DE102011117672B4 (de) 2011-09-19 2013-07-11 Otto Bock Mobility Solutions Gmbh Rückenlehne

Also Published As

Publication number Publication date
EP3085277B1 (fr) 2017-07-26

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