EP2337476A1 - Backrest for a chair - Google Patents

Backrest for a chair

Info

Publication number
EP2337476A1
EP2337476A1 EP08874910A EP08874910A EP2337476A1 EP 2337476 A1 EP2337476 A1 EP 2337476A1 EP 08874910 A EP08874910 A EP 08874910A EP 08874910 A EP08874910 A EP 08874910A EP 2337476 A1 EP2337476 A1 EP 2337476A1
Authority
EP
European Patent Office
Prior art keywords
backrest
back cover
chair
lumbar support
side arms
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
EP08874910A
Other languages
German (de)
French (fr)
Other versions
EP2337476B1 (en
Inventor
Egon Bräuning
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.)
Vitra AG
Original Assignee
Vitra Patente AG
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 Vitra Patente AG filed Critical Vitra Patente AG
Publication of EP2337476A1 publication Critical patent/EP2337476A1/en
Application granted granted Critical
Publication of EP2337476B1 publication Critical patent/EP2337476B1/en
Active 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
    • A47C1/031—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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/54—Supports for the arms
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/04—Metal chairs, e.g. tubular
    • A47C5/06—Special adaptation of seat upholstery or fabric for attachment to tubular 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
    • 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
    • A47C7/42—Support for the head or the back for the back of detachable or loose type
    • 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 present invention relates to a chair of the type with a floor-mounted underframe, a patch on the base mechanism, a seated on the mechanics seat and attached to the backrest mechanism.
  • the backrest has a backrest frame, which is provided with a padding and a cover.
  • the backrest is articulated on the mechanism and can be pivoted from a basically upright zero position to a rearwardly directed tilt position. The movements of the seat and backrest are synchronized with each other.
  • the invention is based on the task of proposing a further improved backrest which supports the user leaning against it ergonomically even more effectively. Another object is to make the connection of the backrest to the chair at the same time easy to install and thus more cost-effective. Finally, there is the task of efficiently designing the backrest to allow optional equipment with different armrests on the chair.
  • the chair for which the backrest is designed has a base placed on the floor, a mechanism attached to the base and a seat fitted to the mechanism.
  • the backrest is attached to the mechanism, the backrest having a backrest frame whose inside surface is made from spanned over a back cover.
  • the backrest frame has a lower
  • BESTATIGUNGSKOPIE The upper end of the side arms are bridged by a transverse strip which elastically deforms under load from a user sitting in the chair in the direction of the force exerted by the leaning user back force, but against the base part from which extends on either side Force is vertically rigid from above.
  • the height of the cross bar is in cross section a multiple of the thickness.
  • the back cover is provided with a seam between the base part, the side arms and the cross bar framed with the back cover seams.
  • an elastically deformable tongue protrudes into a lumbar support fastened to the base section.
  • the stiffness of the lumbar support is adjustable.
  • To adjust the rigidity of the lumbar support is a displaceable in the height position counter bearing.
  • the upper ends of the side arms have connecting elements, which interact with detent with complementary organs on the cross bar.
  • the base section is provided on the user side as well as the area surrounded by the base section, the side arms and the cross bar with a padding, which is spanned in the free space on both sides of the back cover. The seams go through both sides of the back cover.
  • the seams are in principle designed as closed ovals and the bottom seam has a recess to allow the retraction of the tongue of the lumbar support.
  • the backrest frame and the crossbar are made of plastic.
  • the base section has a laterally open cavity, which is pushed open is intended to a fitting of a back strap, which is intended for articulation of the backrest on the mechanism.
  • the connector has a receptacle that is used to attach an armrest, otherwise it can be closed with a cover.
  • the outer edges of the back cover are fitted to strips, which are clipped into locking holes with their catch organs.
  • Figure 1A - a chair with the inventive backrest, with upholstery, without cover, without armrests, in an upright zero position, in a perspective front view;
  • Figure 1 B the chair according to Figure 1A, in side view;
  • Figure 2 the chair according to Figure 1A 1 with fixed armrests as the first type;
  • FIG 3A the chair according to Figure 1A, with adjustable armrests as a second type, in a front perspective view;
  • FIG. 3C the chair according to Figure 3A, without upholstery in the backrest, in front view;
  • FIG. 3D the chair according to Figure 3C, with upholstery in the backrest, in front view;
  • Figure 4 the chair according to Figure 1A, in partial exploded view, with provided armrests of both types;
  • FIG. 5B the arrangement according to Figure 5A, in plan view
  • FIG. 5C both back yokes from FIG. 4 with axle rod and bearing parts, in explosive view;
  • FIG. 5D shows the adjustable armrest from FIG. 4 of the arm receptacle in FIG.
  • FIG. 6A shows the backrest from FIG. 4, in a perspective front view
  • FIG. 6B shows the backrest according to FIG. 6A, without upholstery and covering, with provided lumbai supports of both types, in an exploded view;
  • FIG. 6C shows the arrangement according to FIG. 6A, in a perspective rear view
  • FIG. 6D shows the arrangement according to FIG. 6A, with an approximated frame strip, in a top view in perspective
  • FIG. 6E shows the arrangement according to FIG. 6D, in a normal standing perspective view
  • Figure 6F the arrangement according to Figure 6D, with latched frame strip and provided coating strips
  • Figure 6G a complete backrest, with adjustable Lumbai flesh, padding and cover
  • FIG. 6H shows a section through the transverse strip from FIG. 6B on the line A-A.
  • the chair resting on a base 1 has no armrests.
  • the backrest 4 is hinged to the mechanism 2 and the seat 3.
  • the backrest 4 has a backrest frame 40 in which a lumbar support 48 provided with a padding 49 and a further padding 49 are inserted.
  • On both sides of the flock frame 40 has a cavity 41 for attachment of the back yoke 5, which in turn can be fixed here not provided armrests. Therefore, the receptacle 51 of the back bar 5 is currently closed with a cover 57.
  • a next configuration see FIG.
  • a bow-shaped, not height-adjustable armrest 6 of the first type is attached to the receptacle 51.
  • a further equipment see Figures 3A to 3D) are mounted on the receptacles 51 instead of not height adjustable armrests 6 of the first type in each case adjustable in height armrests 7 second type.
  • FIG. 4 For the sake of completeness, the main components of the entire chair are given, which next to the base 1 and the mechanism 2 has first the seat 3, which is composed of a seat plate 30, the padding 39 and the outer cover 37.
  • An adjusting lever 31 serves to adjust the depth of the seat 3.
  • the two back straps 5 serve on the one hand to receive the backrest 4 and on the other hand at the same time to fix one of the two types of armrests 6, 7. If you want to do without armrests, the cover 57 comes as a closure on the blank holder 51st
  • FIGS. 5A to 5D A back yoke 5 is divided into a projection 52 which serves with the bearing parts 57 for connection to the mechanism 2.
  • the branch 50 extends, which merges into the connecting piece 53.
  • the connection piece 53 In the connection piece 53 is the outwardly open receptacle 51, while inside a raised guide bar 54 is located.
  • stubs 58 From the branch 50, in each case directed towards one another, stubs 58 which receive an axle rod 55 for articulation on the seat 3.
  • different screw holes 56 are present.
  • the adjustable armrest 7 has the support 70, on the inside of which the mechanical block 72 is located, which is intended for insertion into the receptacle 51. From the support of the knob 73 protrudes, upon actuation, the armrest 7 can be adjusted in height.
  • the visible under the armrest 7 Lisserad 71 is used to unlock in order to adjust the armrest 74 in the horizontal plane can.
  • the backrest frame 40 is structured in the base section 42 with the lateral cavities 41 which are surrounded by second latching holes 422. Facing the user, a bearing groove 421 for receiving the plate-shaped counter-bearing 482 extends centrally on the base part 42 and can be varied in the height position by means of an adjusting lever 484 engaging in a toothed wheel 483. At the bottom of the base portion 42 are first detent holes 420. From the two sides of the base portion 42, the two side arms 43 extend, the uppermost conclude with a connection element 430. The open distance between the upper ends of the two side arms 43 is bridged by a transverse strip 44 which has complementary members 440 at its ends, which form a latching plug connection with the connection elements 430.
  • the cross bar 44 has a cross section with a multiple of the height in relation to the thickness.
  • the cross bar 44 flexes elastically when the user leans against it in the sitting position, however, in principle, no deflection is possible at a load from above.
  • the plate-shaped lumbar support 47 has in the non-adjustable Ausrmileung several equal tongues 471, between which are vertically downwardly running cuts 470.
  • the lumbar support 47 is provided with a padding 49, preferably a foam surround.
  • the lumbar support 47 is placed on the base part 42 of the back frame 40, wherein the tongues 471 protrude beyond the base portion 42 into the space between the side arms 43.
  • the also plate-shaped lumbar support 48 has a lying in the middle wide tongue 481, which projects beyond the outer tongues 481, which are divided by cuts 480. This lumbar support 48 has a padding on the user side 49.
  • the lumbar support 48 is positively on the base portion 42, wherein the counter-bearing 482 is adjustable in height and thus touches the back at various positions on the wide tongue 481, what their the user changes effective stiffness.
  • the free space remaining above in the backrest frame 40 is lined with inlaid padding, for example with a foam plate.
  • the tongues 481 of the adjustable lumbar support 48 protrude, the abutment 482 resting against the middle tongue 481.
  • screw holes 423 are arranged around the knob 73 around to fix the lumbar support 48 by means of screws.
  • a cup-shaped frame strip 45 is provided, from which lugs 450 rise, which are provided for latching in the first detent holes 420, wherein the lower edge of the on the user side lying back cover 8 outside pulled over the frame strip 45 and eg is glued.
  • the lower edge of the lying on the back side back cover 8 is reinforced with a terminal block, not shown, and hooked into the longitudinal groove 424. After snapping the frame strip 45 is covered by this hanging in the longitudinal groove 424 terminal block and thereby fixed.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

The chair, for which the backrest (4) is designed, has an underframe (1) sitting on the ground, a mechanism (2) placed onto the underframe (1), and a seat (3) placed onto the mechanism (2). The backrest (4) is fastened to the mechanism (2), wherein the backrest (4) comprises a backrest frame (40), over the inside surface of which a backrest cover (8) is stretched. The backrest frame (40) has a lower base section (42), from which a lateral arm (43) extends upward on either side, wherein the upper ends of the lateral arms are bridged by a cross bar (44), which elastically deforms under the load of a user sitting in the chair in the direction of the force applied by the back of the user resting thereon, but is flexurally rigid against the action of the force perpendicularly from above. The height of the cross bar (44) is multiple times that of the thickness in the cross-section. The backrest cover (8) is provided with seams (80) strengthening the backrest cover (8) over a bordered free space between the base section (42), the lateral arms (43) and the cross bar (44).

Description

Rückenlehne für einen Stuhl Backrest for a chair
Anwendungsgebiet der ErfindungField of application of the invention
Die vorliegende Erfindung bezieht sich auf einen Stuhl der Gattung mit einem auf den Boden aufsetzenden Untergestell, einer auf das Untergestell aufgesetzten Mechanik, einem auf die Mechanik aufgesetzten Sitz und einer an der Mechanik befestigten Rückenlehne. Die Rückenlehne weist einen Lehnenrahmen auf, der mit einer Polsterung und einer Umkleidung versehen ist. Die Rückenlehne ist an der Mechanik angelenkt und von einer im Prinzip aufrechten Nullpo- sition bis in eine nach hinten gewandte Neigungsposition schwenkbar. Die Bewegungen von Sitz und Rückenlehne sind zueinander synchronisiert.The present invention relates to a chair of the type with a floor-mounted underframe, a patch on the base mechanism, a seated on the mechanics seat and attached to the backrest mechanism. The backrest has a backrest frame, which is provided with a padding and a cover. The backrest is articulated on the mechanism and can be pivoted from a basically upright zero position to a rearwardly directed tilt position. The movements of the seat and backrest are synchronized with each other.
Stand der TechnikState of the art
Spezielle Konstruktionen für Rückenlehnen von Stühlen sind z.B. aus den Pa- tentpublikationen WO 2004/037046 A1 und WO 2007/038879, bekannt und haben sich für komfortable Arbeitsstühle auf dem Markt etabliert.Special designs for backrests of chairs are e.g. from the patent publications WO 2004/037046 A1 and WO 2007/038879, and have established themselves on the market for comfortable work chairs.
Aufgabe der ErfindungObject of the invention
In Relation zum vorbekannten Stand der Technik, liegt der Erfindung die Aufga- be zugrunde, eine weiter verbesserte Rückenlehne vorzuschlagen, die den daran lehnenden Benutzer ergonomisch noch effektiver abstützt. Eine weitere Aufgabe besteht darin, die Anbindung der Rückenlehne am Stuhl zugleich montagefreundlicher und damit kostengünstiger zu gestalten. Schliesslich gilt die Aufgabe, bei der Konzeption der Rückenlehne eine wahlweise Ausstattung mit ver- schiedenen Armlehnen am Stuhl effizient zu ermöglichen.In relation to the known state of the art, the invention is based on the task of proposing a further improved backrest which supports the user leaning against it ergonomically even more effectively. Another object is to make the connection of the backrest to the chair at the same time easy to install and thus more cost-effective. Finally, there is the task of efficiently designing the backrest to allow optional equipment with different armrests on the chair.
Übersicht über die ErfindungOverview of the invention
Der Stuhl, für den die Rückenlehne konzipiert ist, hat ein auf den Boden aufsetzendes Untergestell, eine auf das Untergestell aufgesetzte Mechanik und einen auf die Mechanik aufgesetzten Sitz. Die Rückenlehne ist an der Mechanik befestigt, wobei die Rückenlehne einen Lehnenrahmen aufweist, dessen Innenfläche von einem Rückenbezug überspannt ist. Der Lehnenrahmen hat eine unte-The chair for which the backrest is designed has a base placed on the floor, a mechanism attached to the base and a seat fitted to the mechanism. The backrest is attached to the mechanism, the backrest having a backrest frame whose inside surface is made from spanned over a back cover. The backrest frame has a lower
BESTATIGUNGSKOPIE re Basispartie, von welcher sich beidseits je ein Seitenarm aufwärts erstreckt, wobei die oberen Enden der Seitenarme von einer Querleiste überbrückt sind, die sich unter Belastung durch einen im Stuhl sitzenden Benutzer in Richtung der vom anlehnenden Benutzerrücken ausgeübten Kraft elastisch verformt, je- doch gegen Krafteinwirkung senkrecht von oben biegesteif ist.BESTATIGUNGSKOPIE The upper end of the side arms are bridged by a transverse strip which elastically deforms under load from a user sitting in the chair in the direction of the force exerted by the leaning user back force, but against the base part from which extends on either side Force is vertically rigid from above.
Nachfolgend werden spezielle Ausführungsformen der Erfindung definiert: Die Höhe der Querleiste beträgt im Querschnitt ein Vielfaches der Dicke. Der Rückenbezug ist über einen zwischen der Basispartie, den Seitenarmen und der Querleiste umrandeten Freiraum mit den Rückenbezug verfestigenden Nähten versehen.Hereinafter, specific embodiments of the invention are defined: The height of the cross bar is in cross section a multiple of the thickness. The back cover is provided with a seam between the base part, the side arms and the cross bar framed with the back cover seams.
In den von der Basispartie, den Seitenarmen und der Querleiste umrandeten Freiraum ragt eine elastisch verformbare Zunge einer an der Basispartie befes- tigten Lumbaistütze hinein.In the free space framed by the base section, the side arms and the transverse strip, an elastically deformable tongue protrudes into a lumbar support fastened to the base section.
Die Steifigkeit der Lumbaistütze ist einstellbar. Zur Einstellung der Steifigkeit der Lumbaistütze dient ein in der Höhenposition verschiebbares Gegenlager.The stiffness of the lumbar support is adjustable. To adjust the rigidity of the lumbar support is a displaceable in the height position counter bearing.
Die oberen Enden der Seitenarme besitzen Anschlusselemente, welche rastend mit Komplementärorganen an der Querleiste zusammenwirken. Die Basispartie ist auf der Benutzerseite sowie der von der Basispartie, den Seitenarmen und der Querleiste umrandete Freiraum mit einer Polsterung versehen, die im Freiraum beidseitig vom Rückenbezug überspannt ist. Die Nähte gehen durch beide Seiten des Rückenbezugs hindurch.The upper ends of the side arms have connecting elements, which interact with detent with complementary organs on the cross bar. The base section is provided on the user side as well as the area surrounded by the base section, the side arms and the cross bar with a padding, which is spanned in the free space on both sides of the back cover. The seams go through both sides of the back cover.
Die Nähte sind im Prinzip als geschlossene Ovale ausgeführt und die unterste Naht hat eine Aussparung, um das Einfahren der Zunge der Lumbaistütze zu ermöglichen.The seams are in principle designed as closed ovals and the bottom seam has a recess to allow the retraction of the tongue of the lumbar support.
Der Lehnenrahmen und die Querleiste bestehen aus Kunststoff. Die Basispartie hat jeweils seitlich einen nach unten offenen Hohlraum, der zum Aufschieben auf ein Anschlussstück eines Rückenbügels bestimmt ist, der zur Anlenkung der Rückenlehne an der Mechanik bestimmt ist.The backrest frame and the crossbar are made of plastic. The base section has a laterally open cavity, which is pushed open is intended to a fitting of a back strap, which is intended for articulation of the backrest on the mechanism.
Das Anschlussstück hat eine Aufnahme, die zum Befestigen einer Armlehne dient, ansonsten sich mit einer Abdeckung verschliessen lässt. Die Aussenrän- der des Rückenbezugs sind an Leisten gefasst, die mit ihren Rastorganen in Rastlöcher eingeklipst werden.The connector has a receptacle that is used to attach an armrest, otherwise it can be closed with a cover. The outer edges of the back cover are fitted to strips, which are clipped into locking holes with their catch organs.
Kurzbeschreibunq der beigefügten Zeichnungen Es zeigen:BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS FIG.
Figur 1A - einen Stuhl mit der erfindungsgemässen Rückenlehne, mit Polsterung, ohne Überzug, ohne Armlehnen, in aufrechter Nullposition, in perspektivischer Frontansicht;Figure 1A - a chair with the inventive backrest, with upholstery, without cover, without armrests, in an upright zero position, in a perspective front view;
Figur 1 B - den Stuhl gemäss Figur 1A, in Seitenansicht;Figure 1 B - the chair according to Figure 1A, in side view;
Figur 2 - den Stuhl gemäss Figur 1A1 mit feststehenden Armlehnen als erster Typ;Figure 2 - the chair according to Figure 1A 1 with fixed armrests as the first type;
Figur 3A - den Stuhl gemäss Figur 1A, mit verstellbaren Armlehnen als zweiter Typ, in perspektivischer Frontansicht;Figure 3A - the chair according to Figure 1A, with adjustable armrests as a second type, in a front perspective view;
Figur 3B - den Stuhl gemäss Figur 3A, in Seitenansicht;Figure 3B - the chair according to Figure 3A, in side view;
Figur 3C - den Stuhl gemäss Figur 3A, ohne Polsterung in der Rückenlehne, in Frontansicht;Figure 3C - the chair according to Figure 3A, without upholstery in the backrest, in front view;
Figur 3D - den Stuhl gemäss Figur 3C, mit Polsterung in der Rückenlehne, in Frontansicht;Figure 3D - the chair according to Figure 3C, with upholstery in the backrest, in front view;
Figur 4 - den Stuhl gemäss Figur 1A, in partieller Explosivansicht, mit bereitgestellten Armlehnen beider Typen;Figure 4 - the chair according to Figure 1A, in partial exploded view, with provided armrests of both types;
Figur 5A - die Mechanik aus Figur 4 mit angelenkten Rückenbügeln, inFigure 5A - the mechanism of Figure 4 with hinged back straps, in
Perspektivansicht;Perspective view;
Figur 5B - die Anordnung gemäss Figur 5A, in Draufsicht; Figur 5C - beide Rückenbügel aus Figur 4 mit Achsstab und Lagerteilen, in Explosivansicht;Figure 5B - the arrangement according to Figure 5A, in plan view; FIG. 5C - both back yokes from FIG. 4 with axle rod and bearing parts, in explosive view;
Figur 5D die verstellbare Armlehne aus Figur 4 der Armaufnahme imFIG. 5D shows the adjustable armrest from FIG. 4 of the arm receptacle in FIG
Rückenbügel angenähert;Approximate backbone;
Figur 6A die Rückenlehne aus Figur 4, in perspektivischer Frontansicht; Figur 6B die Rückenlehne gemäss Figur 6A, ohne Polsterung und Überzug, mit bereitgestellten Lumbaistützen beider Typen, in Explosivansicht;FIG. 6A shows the backrest from FIG. 4, in a perspective front view; FIG. 6B shows the backrest according to FIG. 6A, without upholstery and covering, with provided lumbai supports of both types, in an exploded view;
Figur 6C die Anordnung gemäss Figur 6A, in perspektivischer Rückansicht; Figur 6D die Anordnung gemäss Figur 6A, mit angenäherter Rahmenleiste, in kopfstehender Perspektivansicht; Figur 6E die Anordnung gemäss Figur 6D, in normalstehender Perspektivansicht; Figur 6F die Anordnung gemäss Figur 6D, mit aufgerasteter Rahmenleiste und bereitgestellten Überzugsleisten; Figur 6G eine komplette Rücklehne, mit verstellbarer Lumbaistütze, Polsterung und Überzug; und Figur 6H einen Schnitt durch die Querleiste aus Figur 6B auf der Linie A-A.FIG. 6C shows the arrangement according to FIG. 6A, in a perspective rear view; FIG. 6D shows the arrangement according to FIG. 6A, with an approximated frame strip, in a top view in perspective; FIG. 6E shows the arrangement according to FIG. 6D, in a normal standing perspective view; Figure 6F, the arrangement according to Figure 6D, with latched frame strip and provided coating strips; Figure 6G a complete backrest, with adjustable Lumbaistütze, padding and cover; and FIG. 6H shows a section through the transverse strip from FIG. 6B on the line A-A.
Ausführungsbeispielembodiment
Anhand der beiliegenden Zeichnungen erfolgt nachstehend die detaillierte Beschreibung eines Ausführungsbeispiels zur erfindungsgemässen Rückenlehne, ihrer Anbindung an die Stuhlmechanik sowie zwei Typen von an der Rückenlehne anzubringenden Armlehnen.The detailed description of an exemplary embodiment of the backrest according to the invention, its connection to the chair mechanism and two types of armrests to be attached to the backrest will now be described with reference to the accompanying drawings.
Für die gesamte weitere Beschreibung gilt folgende Festlegung. Sind in einer Figur zum Zweck zeichnerischer Eindeutigkeit Bezugsziffern enthalten, aber im unmittelbar zugehörigen Beschreibungstext nicht erläutert, so wird auf deren Erwähnung in vorangehenden Figurenbeschreibungen Bezug genommen. Im Interesse der Übersichtlichkeit wird auf die wiederholte Bezeichnung von Bauteilen in nachfolgenden Figuren zumeist verzichtet, sofern zeichnerisch eindeutig erkennbar ist, dass es sich um "wiederkehrende" Bauteile handelt. Figuren 1A bis 3DThe following definition applies to the entire further description. If reference numerals are included in a figure for the purpose of graphic clarity, but are not explained in the directly associated description text, reference is made to their mention in the preceding description of the figures. For the sake of clarity, the repeated designation of components in subsequent figures is usually dispensed with, as far as the drawing clearly shows that they are "recurring" components. Figures 1A to 3D
In der ersten Ausstattung (s. Figuren 1A und 1 B) besitzt der auf einem Untergestell 1 ruhende Stuhl keine Armlehnen. Die an sich aus der WO 2007/124609 A2 bekannte Mechanik 2, welche auf das Untergestell 1 aufgesetzt ist, trägt den Sitz 3. Mittels zwei Rückenbügeln 5 ist die Rückenlehne 4 an der Mechanik 2 und am Sitz 3 angelenkt. Die Rückenlehne 4 hat einen Lehnenrahmen 40, in welchen eine mit einer Polsterung 49 versehene Lumbaistütze 48 sowie eine weitere Polsterung 49 eingesetzt sind. An beiden Seiten hat der Lehenrahmen 40 einen Hohlraum 41 für die Befestigung der Rückenbügel 5, an denen ihrerseits hier nicht vorgesehene Armlehnen befestigt werden können. Daher ist die Aufnahme 51 der Rückenbügel 5 momentan mit einer Abdeckung 57 verschlossen. In einer nächsten Ausstattung (s. Figur 2) ist an der Aufnahme 51 jeweils eine bügeiförmige, nicht in der Höhe verstellbare Armlehne 6 ersten Typs ange- bracht. In einer weiteren Ausstattung (s. Figuren 3A bis 3D) sind an den Aufnahmen 51 anstelle der nicht in der Höhe verstellbaren Armlehnen 6 ersten Typs jeweils in der Höhe verstellbare Armlehnen 7 zweiten Typs anmontiert.In the first equipment (see Figures 1A and 1B), the chair resting on a base 1 has no armrests. The known from WO 2007/124609 A2 mechanism 2, which is placed on the base 1, carries the seat 3. By means of two back straps 5, the backrest 4 is hinged to the mechanism 2 and the seat 3. The backrest 4 has a backrest frame 40 in which a lumbar support 48 provided with a padding 49 and a further padding 49 are inserted. On both sides of the flock frame 40 has a cavity 41 for attachment of the back yoke 5, which in turn can be fixed here not provided armrests. Therefore, the receptacle 51 of the back bar 5 is currently closed with a cover 57. In a next configuration (see FIG. 2), a bow-shaped, not height-adjustable armrest 6 of the first type is attached to the receptacle 51. In a further equipment (see Figures 3A to 3D) are mounted on the receptacles 51 instead of not height adjustable armrests 6 of the first type in each case adjustable in height armrests 7 second type.
Figur 4 Der Vollständigkeit halber werden die Hauptbestandteile des gesamten Stuhls angegeben, der neben dem Untergestell 1 und der Mechanik 2 zunächst den Sitz 3 hat, der sich aus einer Sitzplatte 30, der Polsterung 39 und dem äusseren Überzug 37 zusammensetzt. Ein Stellhebel 31 dient der Tiefeneinstellung des Sitzes 3. Die zwei Rückenbügel 5 dienen einerseits der Aufnahme der Rücken- lehne 4 und andererseits zugleich der eventuellen Befestigung eines der beiden Typen der Armlehnen 6,7. Will man auf Armlehnen verzichten, kommt die Abdeckung 57 als Verschluss auf die unbelegte Aufnahme 51.Figure 4 For the sake of completeness, the main components of the entire chair are given, which next to the base 1 and the mechanism 2 has first the seat 3, which is composed of a seat plate 30, the padding 39 and the outer cover 37. An adjusting lever 31 serves to adjust the depth of the seat 3. The two back straps 5 serve on the one hand to receive the backrest 4 and on the other hand at the same time to fix one of the two types of armrests 6, 7. If you want to do without armrests, the cover 57 comes as a closure on the blank holder 51st
Figuren 5A bis 5D Ein Rückenbügel 5 gliedert sich in einen Ansatz 52, der mit den Lagerteilen 57 zum Anschluss an die Mechanik 2 dient. Vom Ansatz 52 erstreckt sich der Ast 50, der in das Anschlussstück 53 übergeht. Im Anschlussstück 53 befindet sich die nach aussen offene Aufnahme 51, während innen eine erhabene Führungs- leiste 54 liegt. Vom Ast 50 gehen jeweils aufeinander zugerichtet Stutzen 58 ab, die einen Achsstab 55 zur Anlenkung am Sitz 3 aufnehmen. Am Anschlussstück 53 sind verschiedene Schraubenlöcher 56 vorhanden. Die verstellbare Armlehne 7 hat die Stütze 70, an deren Innenseite sich der Mechanikblock 72 befindet, der zum Einsetzen in die Aufnahme 51 bestimmt ist. Aus der Stütze ragt der Stellknopf 73 heraus, bei dessen Betätigung sich die Armlehne 7 in der Höhe verstellen lässt. Das unter der Armlehne 7 sichtbare Löserad 71 dient zur Entriegelung, um die Armauflage 74 in der Horizontalebene verstellen zu können.FIGS. 5A to 5D A back yoke 5 is divided into a projection 52 which serves with the bearing parts 57 for connection to the mechanism 2. From the neck 52, the branch 50 extends, which merges into the connecting piece 53. In the connection piece 53 is the outwardly open receptacle 51, while inside a raised guide bar 54 is located. From the branch 50, in each case directed towards one another, stubs 58 which receive an axle rod 55 for articulation on the seat 3. At the connector 53 different screw holes 56 are present. The adjustable armrest 7 has the support 70, on the inside of which the mechanical block 72 is located, which is intended for insertion into the receptacle 51. From the support of the knob 73 protrudes, upon actuation, the armrest 7 can be adjusted in height. The visible under the armrest 7 Löserad 71 is used to unlock in order to adjust the armrest 74 in the horizontal plane can.
Figuren 6A bis 6HFIGS. 6A to 6H
Der Lehnenrahmen 40 strukturiert sich in die Basispartie 42 mit den seitlichen Hohlräumen 41 , die von zweiten Rastlöchern 422 umgeben sind. Dem Benutzer zugewandt erstreckt sich mittig auf der Basispartie 42 eine Lagernut 421 zur Aufnahme des plattenförmigen Gegenlagers 482, das mittels eines in ein Zahn- rad 483 eingreifenden Stellhebels 484 in der Höhenposition variiert werden kann. An der Unterseite der Basispartie 42 befinden sich erste Rastlöcher 420. Aus den beiden Seiten der Basispartie 42 erstrecken sich die beiden Seitenarme 43, die zuoberst mit einem Anschlusselement 430 abschliessen. Die offene Strecke zwischen den oberen Enden der beiden Seitenarme 43 wird mit einer Querleiste 44 überbrückt, die an ihren Enden Komplementärorgane 440 hat, die eine rastende Steckverbindung mit den Anschlusselementen 430 eingehen. Die Querleiste 44 hat einen Querschnitt mit einem Vielfachen der Höhe im Verhältnis zur Dicke. Damit biegt sich die Querleiste 44 elastisch durch, wenn sich der Benutzer in der Sitzposition dagegen lehnt, jedoch ist im Prinzip keine Durchbiegung möglich bei einer Belastung von oben.The backrest frame 40 is structured in the base section 42 with the lateral cavities 41 which are surrounded by second latching holes 422. Facing the user, a bearing groove 421 for receiving the plate-shaped counter-bearing 482 extends centrally on the base part 42 and can be varied in the height position by means of an adjusting lever 484 engaging in a toothed wheel 483. At the bottom of the base portion 42 are first detent holes 420. From the two sides of the base portion 42, the two side arms 43 extend, the uppermost conclude with a connection element 430. The open distance between the upper ends of the two side arms 43 is bridged by a transverse strip 44 which has complementary members 440 at its ends, which form a latching plug connection with the connection elements 430. The cross bar 44 has a cross section with a multiple of the height in relation to the thickness. Thus, the cross bar 44 flexes elastically when the user leans against it in the sitting position, however, in principle, no deflection is possible at a load from above.
Die plattenförmige Lumbaistütze 47 hat in der nicht-verstellbaren Ausrührung mehrere gleich hohe Zungen 471, zwischen denen senkrecht abwärts laufende Einschnitte 470 liegen. Auf der dem Benutzer zugewandten Seite ist die Lum- baistütze 47 mit einer Polsterung 49, vorzugsweise einer Umschäumung versehen. Im montierten Zustand ist die Lumbaistütze 47 auf die Basispartie 42 des Lehnenrahmens 40 aufgelegt, wobei die Zungen 471 über die Basispartie 42 hinaus in den Freiraum zwischen den Seitenarmen 43 ragen. In der verstellbaren Ausrührung hat die ebenfalls plattenförmige Lumbaistütze 48 eine in der Mitte liegende breite Zunge 481 , welche die äusseren Zungen 481 nach oben überragt, die durch Einschnitte 480 abgeteilt sind. Auch diese Lumbaistütze 48 hat auf der Benutzerseite eine Polsterung 49. Im montierten Zustand liegt die Lumbaistütze 48 formschlüssig auf der Basispartie 42, wobei das Gegenlager 482 in der Höhe verstellbar ist und somit rückseitig an verschiedenen Positionen auf der breiten Zunge 481 aufsetzt, was deren für den Benutzer wirksame Steifigkeit verändert. Unabhängig davon, welche der Lumbalstüt- zen 47,48 man einsetzt, wird der oberhalb im Lehnenrahmen 40 verbleibende Freiraum mit eingelegter Polsterung ausgekleidet, z.B. mit einer Schaumstoffplatte.The plate-shaped lumbar support 47 has in the non-adjustable Ausrührung several equal tongues 471, between which are vertically downwardly running cuts 470. On the side facing the user, the lumbar support 47 is provided with a padding 49, preferably a foam surround. In the assembled state, the lumbar support 47 is placed on the base part 42 of the back frame 40, wherein the tongues 471 protrude beyond the base portion 42 into the space between the side arms 43. In the adjustable Ausrührung the also plate-shaped lumbar support 48 has a lying in the middle wide tongue 481, which projects beyond the outer tongues 481, which are divided by cuts 480. This lumbar support 48 has a padding on the user side 49. In the assembled state, the lumbar support 48 is positively on the base portion 42, wherein the counter-bearing 482 is adjustable in height and thus touches the back at various positions on the wide tongue 481, what their the user changes effective stiffness. Regardless of which of the lumbar supports 47, 48 one uses, the free space remaining above in the backrest frame 40 is lined with inlaid padding, for example with a foam plate.
Im Freiraum zwischen den Seitenarmen 43 und oberhalb der Basispartie 42 ra- gen die Zungen 481 der verstellbaren Lumbaistütze 48 hervor, wobei gegen die mittlere Zunge 481 das Gegenlager 482 aufsetzt. Auf der Rückseite der Basispartie 42 sind um den Stellknopf 73 herum Schraubenlöcher 423 angeordnet, um mittels Schrauben die Lumbaistütze 48 zu fixieren. An der Unterseite der Basispartie 42 verläuft eine Längsnut 424. Zum Fixieren der Ränder des Rü- ckenbezugs 8 ist eine schalenförmige Rahmenleiste 45 vorgesehen, von welcher sich Nasen 450 erheben, die zum Einrasten in die ersten Rastlöcher 420 vorgesehen sind, wobei die Unterkante des auf der Benutzerseite liegenden Rückenbezugs 8 aussen über die Rahmenleiste 45 gezogen und z.B. festgeklebt ist. Die Unterkante des auf der Rückenseite liegenden Rückenbezugs 8 ist mit einer nicht gezeigten Klemmleiste verstärkt und in die Längsnut 424 eingehängt. Nach Aufrasten der Rahmenleiste 45 wird von dieser die in der Längsnut 424 hängende Klemmleiste überdeckt und dadurch fixiert.In the free space between the side arms 43 and above the base portion 42, the tongues 481 of the adjustable lumbar support 48 protrude, the abutment 482 resting against the middle tongue 481. On the back of the base portion 42 screw holes 423 are arranged around the knob 73 around to fix the lumbar support 48 by means of screws. For fixing the edges of the back cover 8 a cup-shaped frame strip 45 is provided, from which lugs 450 rise, which are provided for latching in the first detent holes 420, wherein the lower edge of the on the user side lying back cover 8 outside pulled over the frame strip 45 and eg is glued. The lower edge of the lying on the back side back cover 8 is reinforced with a terminal block, not shown, and hooked into the longitudinal groove 424. After snapping the frame strip 45 is covered by this hanging in the longitudinal groove 424 terminal block and thereby fixed.
Für einen sauberen Abschluss der Aussenkanten des Rückenbezugs 8 um die Hohlräume 41 herum wird eine Überzugsleiste 46 mit davon abstehenden Nasen 460 an den Aussenkanten angebracht, z.B. angenäht. Diese schlägt man nach innen in die Hohlräume 41 und rastet die Nasen 460 in den zweiten Rastlöchern 422 ein. In diesem vorbereiteten Zustand wird bei der Montage die komplette Rückenlehne 4 auf die beiden an der Mechanik 2 befestigten Rückenbügel 5, nämlich deren Anschlussstücke 53 aufgeschoben, die in die nach unten offenen Hohlräume 41 einfahren. Im positionierten Zustand wird der Rückenbügel 5 durch sein Anschlussstück 53 mit der Basispartie 42 ver- schraubt. Im Freiraum zwischen den Seitenarmen 43 und der Basispartie 43 sind am Rückenbezug 8 durch den auf beiden Seiten der Rückenlehne 4 überspannten Rückenbezug 8, einschliesslich der darin eingebetteten Polsterung 49, durchgehende Nähte 80 vorgesehen. Bei Verwendung einer verstellbaren Lumbaistütze 48 weist die unterste im geschlossenen Oval angefertigte Naht 80 eine Aussparung 81 auf, damit die hoch aufragende mittlere Zunge 481 der Lumbaistütze 48 in diese taschenförmige Naht 80 hineinragen kann.For a clean completion of the outer edges of the back cover 8 around the cavities 41 around a coating strip 46 with protruding lugs 460 attached to the outer edges, eg sewn. This one hits inwardly into the cavities 41 and snaps the noses 460 in the second locking holes 422 a. In this prepared condition, the complete backrest 4 on the two attached to the mechanism 2 back strap 5, namely pushed their fittings 53, which retract into the downwardly open cavities 41. In the positioned state, the back strap 5 is screwed by its connecting piece 53 to the base section 42. In the space between the side arms 43 and the base portion 43 are provided on the back cover 8 by the spanned on both sides of the backrest 4 back cover 8, including the embedded therein padding 49, continuous seams 80. When using an adjustable lumbar support 48, the lowermost seam 80 made in the closed oval has a recess 81 so that the towering middle tongue 481 of the lumbar support 48 can protrude into this pocket-shaped seam 80.
Mit diesem konstruktiven Aufbau der Rückenlehne 4 gelingen einerseits eine dünne und leichte Gestaltung, andererseits ausgezeichnete ergonomische Ei- genschaften. Ein sich zurücklehnender Benutzer biegt durch sein Gewicht die Querleiste 44 etwas nach aussen durch, so dass sich die oberen Eckbereiche der Rückenlehne 4 relativ auf die Schulterpartie des Benutzers zubewegen und ihn damit hervorragend stützen. Zugleich sinkt der Benutzer weich abgefedert mit seinem Rücken in die Rückenlehne 4 ein, erfährt dadurch eine bequeme, abgestützte Krümmung mit der Folge, dass seine Kopfhaltung quasi automatisch eine im Prinzip horizontale Blickrichtung ergibt. With this structural design of the backrest 4, on the one hand, a thin and lightweight design succeeds, on the other hand, excellent ergonomic properties. A reclining user flexes the cross bar 44 somewhat outwards by its weight, so that the upper corner areas of the backrest 4 move relatively towards the shoulder portion of the user and thus provide excellent support. At the same time the user sinks softly cushioned with his back in the backrest 4, thereby experiencing a comfortable, supported curvature, with the result that his head posture almost automatically results in a horizontal direction of view in principle.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Rückenlehne (4) für einen Stuhl mit: a) einem auf den Boden aufsetzenden Untergestell (1); b) einer auf das Untergestell (1) aufgesetzten Mechanik (2); c) einem auf die Mechanik (2) aufgesetzten Sitz (3); und d) einer an der Mechanik (2) befestigten Rückenlehne (4), die einen Lehnenrahmen (40) aufweist, dessen Innenfläche von einem Rückenbezug (8) überspannt ist, dadurch gekennzeichnet, dass e) der Lehnenrahmen (40) aus einer unteren Basispartie (42) besteht, von wel- eher sich beidseits je ein Seitenarm (43) aufwärts erstreckt und die oberenA seat back (4) for a chair comprising: a) a base (1) placed on the floor; b) a mechanism (2) placed on the underframe (1); c) a seat (3) placed on the mechanism (2); and d) a backrest (4) fastened to the mechanism (2), which has a backrest frame (40) whose inner surface is covered by a back cover (8), characterized in that e) the back frame (40) consists of a lower base part (42), of which a side arm (43) extends upwards on both sides and the upper one
Enden der Seitenarme (43) von einer Querleiste (44) überbrückt sind, die sich unter Belastung durch einen im Stuhl sitzenden Benutzer in Richtung der vom anlehnenden Benutzerrücken ausgeübten Kraft elastisch verformt, jedoch gegen Krafteinwirkung senkrecht von oben biegesteif ist.Ends of the side arms (43) by a transverse bar (44) are bridged, which is elastically deformed under load by a user sitting in the chair in the direction of the force applied by the leaning user back force, but is resistant to bending vertically from above.
2. Rückenlehne (4) nach Anspruch 1 , dadurch gekennzeichnet, dass a) die Höhe der Querleiste (44) im Querschnitt ein Vielfaches der Dicke beträgt; und b) der Rückenbezug (8) über einen zwischen der Basispartie (42), den Seiten- armen (43) und der Querleiste (44) umrandeten Freiraum mit den Rückenbezug (8) verfestigenden Nähten (80) versehen ist.2. Backrest (4) according to claim 1, characterized in that a) the height of the transverse strip (44) in cross-section is a multiple of the thickness; and b) the back cover (8) is provided with seams (80) which consolidate the back cover (8) via a free space bordered between the base section (42), the side arms (43) and the transverse strip (44).
3. Rückenlehne (4) nach mindestens einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass in den von der Basispartie (42), den Seitenar- men (43) und der Querleiste (44) umrandeten Freiraum eine elastisch verformbare Zunge (471 ,481) einer an der Basispartie (42) befestigten Lumbaistütze (47,48) hineinragt.3. backrest (4) according to at least one of claims 1 and 2, characterized in that in the of the base portion (42), the side arms (43) and the transverse strip (44) bordered free space an elastically deformable tongue (471, 481) of a base part (42) fixed lumbar support (47,48) protrudes.
4. Rückenlehne (4) nach mindestens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass a) die Steifigkeit der Lumbaistütze (48) einstellbar ist; und b) zur Einstellung der Steifigkeit der Lumbaistütze (48) ein in der Höhenposition verschiebbares Gegenlager (482) dient.4. backrest (4) according to at least one of claims 1 to 3, characterized in that a) the rigidity of the lumbar support (48) is adjustable; and b) for adjusting the rigidity of the lumbar support (48) a displaceable in the height position abutment (482) is used.
5. Rückenlehne (4) nach mindestens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass a) die oberen Enden der Seitenarme (43) Anschlusselemente (430) besitzen, welche rastend mit Komplementärorganen (440) an der Querleiste (44) zusammenwirken; b) die Basispartie (42) auf der Benutzerseite sowie der von der Basispartie (42), den Seitenarmen (43) und der Querleiste (44) umrandete Freiraum mit einer Polsterung (49) versehen ist, die im Freiraum beidseitig vom Rückenbezug (8) überspannt ist; und c) die Nähte (80) durch beide Seiten des Rückenbezugs (8) durchgehen.5. backrest (4) according to at least one of claims 1 to 4, characterized in that a) have the upper ends of the side arms (43) connecting elements (430) which latchingly cooperate with complementary members (440) on the transverse bar (44); b) the base part (42) on the user side and of the base part (42), the side arms (43) and the transverse strip (44) framed free space is provided with a padding (49) in the free space on both sides of the back cover (8) is overstretched; and c) passing through the seams (80) through both sides of the back cover (8).
6. Rückenlehne (4) nach mindestens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Nähte (80) im Prinzip als geschlossene Ovale ausgeführt sind und die unterste Naht (80) eine Aussparung (81) hat, um das Einfahren der Zunge (481) der Lumbaistütze (48) zu ermöglichen.6. backrest (4) according to at least one of claims 1 to 5, characterized in that the seams (80) are designed in principle as closed ovals and the bottom seam (80) has a recess (81) to retract the tongue (481) lumbar support (48).
7. Rückenlehne (4) nach mindestens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass a) der Lehnenrahmen (40) und die Querleiste (44) aus Kunststoff bestehen; und b) die Basispartie (42) jeweils seitlich einen nach unten offenen Hohlraum (41) hat, der zum Aufschieben auf ein Anschlussstück (53) eines Rückenbügels7. Backrest (4) according to at least one of claims 1 to 6, characterized in that a) the back frame (40) and the transverse strip (44) consist of plastic; and b) the base part (42) each laterally has a downwardly open cavity (41) for pushing on a connecting piece (53) of a back strap
(5) bestimmt ist, der zur Anlenkung der Rückenlehne (4) an der Mechanik (2) bestimmt ist.(5) is determined, which is intended for articulation of the backrest (4) on the mechanism (2).
8. Rückenlehne (4) nach mindestens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass a) das Anschlussstück (53) eine Aufnahme (51) hat, die zum Befestigen einer Armlehne (6,7) dient, ansonsten sich mit einer Abdeckung (57) verschlies- sen lässt; und die Aussenränder des Rückenbezugs (8) an Leisten (45,46) gefasst sind, die mit ihren Rastorganen (450,460) in Rastlöcher (420,422) eingeklipst werden. 8. Backrest (4) according to at least one of claims 1 to 7, characterized in that a) the connecting piece (53) has a receptacle (51) which serves for attaching an armrest (6,7), otherwise with a cover (57); and the outer edges of the back cover (8) on strips (45,46) are taken, which are clipped with their locking members (450,460) in locking holes (420,422).
EP08874910A 2008-10-21 2008-10-21 Backrest for a chair Active EP2337476B1 (en)

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IT1402398B1 (en) * 2010-10-21 2013-09-04 Bonetti BACKREST STRUCTURE, PARTICULARLY FOR CHAIRS.
DE202010008894U1 (en) 2010-10-26 2010-12-30 Vitra Patente Ag Height-adjustable lumbar support for a chair
US20230284780A1 (en) * 2022-03-08 2023-09-14 Teng-Jen Yang One-Piece Chair Backs and Chairs Having the Same

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US5253923A (en) * 1991-08-21 1993-10-19 Leroy Gootee Seat assembly having wedged locking mechanism
DE19754817A1 (en) * 1997-12-10 1999-06-17 Stoll Sedus Ag backrest
AU783829B2 (en) * 2000-09-28 2005-12-08 Formway Furniture Limited A reclinable chair
US6390553B1 (en) * 2000-10-11 2002-05-21 Leblanc Andrew J. Back-support device
DE20216302U1 (en) 2002-10-22 2003-04-17 Vitra Patente Ag Muttenz Tilting backrest with elastic covering
JP4987739B2 (en) 2005-03-01 2012-07-25 ハワース、インク． Chair and lumbar support pad for chair, lumbar support pad assembly
ATE396632T1 (en) * 2005-03-04 2008-06-15 Provenda Marketing Ag SEATING FURNITURE WITH BACKREST AND ARMRESTS
ATE479361T1 (en) 2005-10-03 2010-09-15 Vitra Patente Ag CHAIR

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