EP2337476B1 - Backrest for a chair - Google Patents
Backrest for a chair Download PDFInfo
- Publication number
- EP2337476B1 EP2337476B1 EP08874910A EP08874910A EP2337476B1 EP 2337476 B1 EP2337476 B1 EP 2337476B1 EP 08874910 A EP08874910 A EP 08874910A EP 08874910 A EP08874910 A EP 08874910A EP 2337476 B1 EP2337476 B1 EP 2337476B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- backrest
- base portion
- chair
- transverse strip
- back cover
- 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.)
- Active
Links
- 238000005728 strengthening Methods 0.000 claims abstract 2
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 239000011796 hollow space material Substances 0.000 claims 1
- 230000000284 resting effect Effects 0.000 abstract description 3
- 210000002105 tongue Anatomy 0.000 description 10
- 239000002360 explosive Substances 0.000 description 3
- 239000006260 foam Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
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- 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—Supports for the head or the back
- A47C7/40—Supports 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—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
- A47C7/42—Supports 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—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
- A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Supports 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 hinged to 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 height of the cross bar is in cross section a multiple of the thickness, so that the cross bar is elastically deformable 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.
- the invention has for its object to propose a further improved backrest that supports the user leaning ergonomically even more effective. 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, the task of efficient design of the backrest with an optional equipment with various 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 back frame has a lower Base portion from which a side arm extends upwardly on both sides, wherein the upper ends of the side arms are bridged by a transverse bar, which deforms under load by a user sitting in the chair in the direction of the force applied by the leaning user back force elastically, but against the action of force perpendicular from is rigid above.
- the height of the cross bar is in cross section a multiple of the thickness.
- the upper ends of the side arms have connecting elements, which interact with detent with complementary organs on the cross bar.
- specific embodiments of the invention are defined:
- the back cover is provided with a seam between the base part, the side arms and the cross bar bordered with the back cover solidifying seams.
- the side arms and the transverse strip protrudes an elastically deformable tongue of a lumbar support attached 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 abutment.
- 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 sutures are in principle designed as closed ovals and the lowest suture has a recess to allow 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 taken on strips, which are clipped with their catch organs in detent holes.
- the first equipment (s. Figures 1A and 1B ) has the chair resting on a base 1 chair no armrests.
- the in itself from the WO 2007/124609 A2 known mechanism 2 which is placed on the base frame 1 , carries the seat 3.
- 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 .
- FIG. 2 In a next equipment (s. FIG. 2 ) is attached to the receptacle 51 each have a bow-shaped, not adjustable in height armrest 6 of the first type.
- FIGS. 3A to 3D In a further equipment (s. FIGS. 3A to 3D ) are mounted on the receptacles 51 instead of not height adjustable armrests 6 of the first type each adjustable in height armrests 7 second type.
- the main components of the entire chair are specified, 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 for depth adjustment 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 the eventual attachment of one of the two types of armrests 6 , 7th If you want to do without armrests, the cover 57 comes as a closure on the blank holder 51st
- FIGS. 5A to 5D are identical to 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 is the outwardly open receptacle 51 , while inside a raised guide rail 54 is located.
- stubs 58 which receive an axle rod 55 for articulation on the seat 3 .
- 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 extends centrally on the base portion 42 a bearing groove 421 for receiving the plate-shaped abutment 482 , which can be varied by means of a 483 engaging in a gear adjusting lever 484 in the height position.
- a bearing groove 421 for receiving the plate-shaped abutment 482 , which can be varied by means of a 483 engaging in a gear adjusting lever 484 in the height position.
- At the bottom of the base portion 42 are first detent holes 420 .
- the two side arms 43 which terminate at the top with a connection element 430 extend from the two sides of the base section 42 .
- 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 portion 42 of the back frame 40 , wherein the tongues 471 project 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 also has a padding 49 on the user side.
- the lumbar support 48 is positively on the base portion 42 , wherein the counter-bearing 482 is adjustable in height and thus the rear touches on different positions on the wide tongue 481 , which changes their effective for the user stiffness.
- the remaining above in the back frame 40 free space is lined with inlaid padding, eg with a foam plate.
- a cup-shaped frame strip 45 is provided, from which lugs 450 are provided, which are provided for locking into the first locking holes 420 , wherein the lower edge of lying on the user side 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.
- the lowermost closed-oval suture 80 has a recess 81 so that the high-towering central tongue 481 of the lumbar support 48 can protrude into this pocket-shaped suture 80 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
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 Nullposition 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 hinged to 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.
Spezielle Konstruktionen für Rückenlehnen von Stühlen sind z.B. aus den Patentpublikationen
In Relation zum vorbekannten Stand der Technik, liegt der Erfindung die Aufgabe 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 verschiedenen Armlehnen am Stuhl effizient zu ermöglichen.In relation to the prior art, the invention has for its object to propose a further improved backrest that supports the user leaning ergonomically even more effective. 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, the task of efficient design of the backrest with an optional equipment with various armrests on the chair.
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 untere 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, jedoch gegen Krafteinwirkung senkrecht von oben biegesteif ist.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 back frame has a lower Base portion from which a side arm extends upwardly on both sides, wherein the upper ends of the side arms are bridged by a transverse bar, which deforms under load by a user sitting in the chair in the direction of the force applied by the leaning user back force elastically, but against the action of force perpendicular from is rigid above.
Die Höhe der Querleiste beträgt im Querschnitt ein Vielfaches der Dicke. Die oberen Enden der Seitenarme besitzen Anschlusselemente, welche rastend mit Komplementärorganen an der Querleiste zusammenwirken. Nachfolgend werden spezielle Ausführungsformen der Erfindung definiert: Der Rückenbezug ist über einen zwischen der Basispartie, den Seitenarmen und der Querleiste umrandeten Freiraum mit den Rückenbezug verfestigenden Nähten versehen.The height of the cross bar is in cross section a multiple of the thickness. The upper ends of the side arms have connecting elements, which interact with detent with complementary organs on the cross bar. Hereinafter, specific embodiments of the invention are defined: The back cover is provided with a seam between the base part, the side arms and the cross bar bordered with the back cover solidifying seams.
In den von der Basispartie, den Seitenarmen und der Querleiste umrandeten Freiraum ragt eine elastisch verformbare Zunge einer an der Basispartie befestigten Lumbalstütze hinein.In the free space framed by the base section, the side arms and the transverse strip protrudes an elastically deformable tongue of a lumbar support attached to the base section.
Die Steifigkeit der Lumbalstütze ist einstellbar. Zur Einstellung der Steifigkeit der Lumbalstütze 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 abutment.
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 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 Lumbalstütze zu ermöglichen.The sutures are in principle designed as closed ovals and the lowest suture has a recess to allow 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 Aussenränder 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 taken on strips, which are clipped with their catch organs in detent holes.
Es zeigen:
- Figur 1A
- - einen Stuhl mit der erfindungsgemässen Rückenlehne, mit Polsterung, ohne Überzug, ohne Armlehnen, in aufrechter Nullposition, in perspektivischer Frontansicht;
- Figur 1B
- - den Stuhl gemäss
Figur 1A , in Seitenansicht; Figur 2- - den Stuhl gemäss
Figur 1A , mit feststehenden Armlehnen als erster Typ; - Figur 3A
- - den Stuhl gemäss
Figur 1A , mit verstellbaren Armlehnen als zweiter Typ, in perspektivischer Frontansicht; - Figur 3B
- - den Stuhl gemäss
Figur 3A , in Seitenansicht; - Figur 3C
- - den Stuhl gemäss
Figur 3A , ohne Polsterung in der Rückenlehne, in Frontansicht; - Figur 3D
- - den Stuhl gemäss
Figur 3C , mit Polsterung in der Rückenlehne, in Frontansicht; Figur 4- - den Stuhl gemäss
Figur 1A , in partieller Explosivansicht, mit bereitgestellten Armlehnen beider Typen; - Figur 5A
- - die Mechanik aus
mit angelenkten Rückenbügeln, in Perspektivansicht;Figur 4 - Figur 5B
- - die Anordnung gemäss
Figur 5A , in Draufsicht; - Figur 5C
- - beide Rückenbügel aus
mit Achsstab und Lagerteilen,Figur 4 - Figur 5D
- in Explosivansicht; - die verstellbare Armlehne aus
der Armaufnahme im Rückenbügel angenähert;Figur 4 - Figur 6A
- - die Rückenlehne aus
, in perspektivischer Frontansicht;Figur 4 - Figur 6B
- - die Rückenlehne gemäss
Figur 6A , ohne Polsterung und Überzug, mit bereitgestellten Lumbalstützen beider Typen, in Explosivansicht; - 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 Lumbalstütze, Polsterung und Überzug; und
- Figur 6H
- - einen Schnitt durch die Querleiste aus
Figur 6B auf der Linie A-A.
- Figure 1A
- - A chair with the inventive backrest, with upholstery, without cover, without armrests, in an upright zero position, in a perspective front view;
- FIG. 1B
- - according to the chair
Figure 1A , in side view; - FIG. 2
- - according to the chair
Figure 1A , with fixed armrests as the first type; - FIG. 3A
- - according to the chair
Figure 1A , with adjustable armrests as second type, in front perspective view; - FIG. 3B
- - according to the chair
FIG. 3A , in side view; - FIG. 3C
- - according to the chair
FIG. 3A , without upholstery in the backrest, in front view; - Figure 3D
- - according to the chair
FIG. 3C , with upholstery in the backrest, in front view; - FIG. 4
- - according to the chair
Figure 1A , in partial explosive view, with provided armrests of both types; - FIG. 5A
- - the mechanics off
FIG. 4 with hinged back straps, in perspective view; - FIG. 5B
- - The arrangement according to
FIG. 5A in plan view; - FIG. 5C
- - both back straps off
FIG. 4 with axle rod and bearing parts, - FIG. 5D
- in explosive view; - the adjustable armrest
FIG. 4 approximated to the arm support in the back bar; - FIG. 6A
- - the backrest off
FIG. 4 in perspective front view; - FIG. 6B
- - the backrest according to
FIG. 6A , without upholstery and cover, with provided lumbar supports of both types, in explosive view; - FIG. 6C
- - The arrangement according to
FIG. 6A , in perspective rear view; - FIG. 6D
- - The arrangement according to
FIG. 6A , with approximate frame strip, in inverted perspective view; - FIG. 6E
- - The arrangement according to
FIG. 6D in normal standing perspective view; - FIG. 6F
- - The arrangement according to
FIG. 6D , with latched frame strip and provided cover strips; - FIG. 6G -
- a complete backrest, with adjustable lumbar support, padding and cover; and
- FIG. 6H
- - Make a cut through the cross bar
FIG. 6B on the line AA.
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.The 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.
In der ersten Ausstattung (s.
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 Rückenlehne 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.For the sake of completeness, the main components of the entire chair are specified, which next to the
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 Führungsleiste 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.A
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 Zahnrad 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
Die plattenförmige Lumbalstütze 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 Lumbalstütze 47 mit einer Polsterung 49, vorzugsweise einer Umschäumung versehen. Im montierten Zustand ist die Lumbalstütze 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.The plate-shaped
In der verstellbaren Ausrührung hat die ebenfalls plattenförmige Lumbalstütze 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 Lumbalstütze 48 hat auf der Benutzerseite eine Polsterung 49. Im montierten Zustand liegt die Lumbalstütze 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 Lumbalstützen 47,48 man einsetzt, wird der oberhalb im Lehnenrahmen 40 verbleibende Freiraum mit eingelegter Polsterung ausgekleidet, z.B. mit einer Schaumstoffplatte.In the adjustable Ausrührung the also plate-shaped
Im Freiraum zwischen den Seitenarmen 43 und oberhalb der Basispartie 42 ragen die Zungen 481 der verstellbaren Lumbalstütze 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 Lumbalstütze 48 zu fixieren. An der Unterseite der Basispartie 42 verläuft eine Längsnut 424. Zum Fixieren der Ränder des Rückenbezugs 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 space between the
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 verschraubt. 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 Lumbalstütze 48 weist die unterste im geschlossenen Oval angefertigte Naht 80 eine Aussparung 81 auf, damit die hoch aufragende mittlere Zunge 481 der Lumbalstütze 48 in diese taschenförmige Naht 80 hineinragen kann.For a clean completion of the outer edges of the
Mit diesem konstruktiven Aufbau der Rückenlehne 4 gelingen einerseits eine dünne und leichte Gestaltung, andererseits ausgezeichnete ergonomische Eigenschaften. 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
Claims (7)
- Backrest (4) for a chair, with:a) an underframe (1) sitting on the floor;b) a mechanism (2) placed onto the underframe (1);c) a seat (3) placed onto the mechanism (2); andd) a backrest (4) which is fastened to the mechanism (2) and has a backrest frame (40), the inside surface of which is spanned by a back cover (8), wherein:e) the backrest frame (40) consists of a lower base portion (42) from which one side arm (43) extends upwards on both sides, and the upper ends of the side arms (43) are bridged by a transverse strip (44);f) the height of the transverse strip (44) in cross section is a multiple of the thickness, and therefore the transverse strip (44) is elastically deformable under loading by a force exerted by a chair user in the direction in which the user's back leans against the chair, but is flexurally rigid counter to a dynamic effect perpendicularly from above, characterised in thatg) the upper ends of the side arms (43) have connection elements (430) which interact in a latching manner with complementary elements (440) on the transverse strip (44).
- Backrest (4) according to Claim 1, characterised in thata) the back cover (8) is provided via a free space boxed in between the base portion (42), the side arms (43) and the transverse strip (44) with seams (80) strengthening the back cover (8);b) the base portion (42) on the user side and the free space boxed in by the base portion (42), the side arms (43) and the transverse strip (44) are provided with a pad (49) which is spanned in the free space on both sides by the back cover (8); andc) the seams (80) pass through both sides of the back cover (8).
- Backrest (4) according to at least either of Claims 1 and 2, characterised in that an elastically deformable tongue (471,481) of a lumbar support (47,48) fastened to the base portion (42) projects into the free space boxed in by the base portion (42), the side arms (43) and the transverse strip (44).
- Backrest (4) according to at least one of Claims 1 to 3, characterised in thata) the rigidity of the lumbar support (48) is adjustable; andb) a counterbearing (482) which is displaceable in the vertical position serves to adjust the rigidity of the lumbar support (48).
- Backrest (4) according to at least one of Claims 1 to 4, characterised in that the seams (80) are in principle designed as closed ovals and the lowermost seam (80) has a recess (81) in order to permit the entry of the tongue (481) of the lumbar support (48).
- Backrest (4) according to at least one of Claims 1 to 5, characterised in thata) the backrest frame (40) and the transverse strip (44) are composed of plastic; andb) the base portion (42) has, in each case laterally, a downwardly open hollow space (41) which is intended for pushing onto a connection piece (53) of a back bracket (5) which is intended for articulating the backrest (4) on the mechanism (2).
- Backrest (4) according to at least one of Claims 1 to 6, characterised in thata) the connection piece (53) has a receptacle (51) which serves for the fastening of an arm rest (6,7) and otherwise can be closed by a covering (57); andb) the outer edges of the back cover (8) are contained on strips (45,46) which are clipped by the latching elements (450,460) thereof into latching holes (420,422).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2008/000436 WO2010045745A1 (en) | 2008-10-21 | 2008-10-21 | Backrest for a chair |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2337476A1 EP2337476A1 (en) | 2011-06-29 |
EP2337476B1 true EP2337476B1 (en) | 2012-08-15 |
Family
ID=40756278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08874910A Active EP2337476B1 (en) | 2008-10-21 | 2008-10-21 | Backrest for a chair |
Country Status (3)
Country | Link |
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EP (1) | EP2337476B1 (en) |
ES (1) | ES2392577T3 (en) |
WO (1) | WO2010045745A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
CN101208031B (en) | 2005-03-01 | 2013-07-17 | 霍沃思公司 | Chair back with lumbar and pelvic supports |
ATE396632T1 (en) * | 2005-03-04 | 2008-06-15 | Provenda Marketing Ag | SEATING FURNITURE WITH BACKREST AND ARMRESTS |
JP2009509592A (en) | 2005-10-03 | 2009-03-12 | ヴィトラ・パテンテ・アクチエンゲゼルシャフト | Chair |
-
2008
- 2008-10-21 EP EP08874910A patent/EP2337476B1/en active Active
- 2008-10-21 ES ES08874910T patent/ES2392577T3/en active Active
- 2008-10-21 WO PCT/CH2008/000436 patent/WO2010045745A1/en active Application Filing
Also Published As
Publication number | Publication date |
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WO2010045745A1 (en) | 2010-04-29 |
EP2337476A1 (en) | 2011-06-29 |
ES2392577T3 (en) | 2012-12-12 |
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