EP0503262A1 - Backrest for a chair - Google Patents

Backrest for a chair Download PDF

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Publication number
EP0503262A1
EP0503262A1 EP92101671A EP92101671A EP0503262A1 EP 0503262 A1 EP0503262 A1 EP 0503262A1 EP 92101671 A EP92101671 A EP 92101671A EP 92101671 A EP92101671 A EP 92101671A EP 0503262 A1 EP0503262 A1 EP 0503262A1
Authority
EP
European Patent Office
Prior art keywords
support plate
hook
backrest according
cover shell
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.)
Withdrawn
Application number
EP92101671A
Other languages
German (de)
French (fr)
Inventor
Konrad Wild
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.)
Dauphin Entwicklungs und Beteiligungs GmbH
Original Assignee
Friedrich W Dauphin & Co Entwicklungs- und Beteiligungs-Kg GmbH
Friedrich W Dauphin GmbH and Co
Dauphin Entwicklungs und Beteiligungs GmbH
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 Friedrich W Dauphin & Co Entwicklungs- und Beteiligungs-Kg GmbH, Friedrich W Dauphin GmbH and Co, Dauphin Entwicklungs und Beteiligungs GmbH filed Critical Friedrich W Dauphin & Co Entwicklungs- und Beteiligungs-Kg GmbH
Publication of EP0503262A1 publication Critical patent/EP0503262A1/en
Withdrawn legal-status Critical Current

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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
    • A47C7/42—Support for the head or the back for the back of detachable or loose type

Definitions

  • the invention relates to a backrest for a chair, in particular an office chair, according to the preamble of claim 1.
  • the cover shell is provided with arrow-shaped locking pins, which thus have barb-like tips, while correspondingly undercut receiving sleeves are provided for the locking pins on the back of the support plate.
  • the production is relatively complex, since the locking pins on the one hand and the receiving sleeves on the other hand cannot be made from cheap plastic, but must be glued if relatively simple plastics are used for the support plate and the cover shell itself.
  • the assembly of the cover shell on the support plate is relatively simple, although it takes a lot of effort; however, loosening is only possible with great difficulty and usually leads to a break-off of at least some of the locking pins, so that re-assembly is not reliably possible.
  • the invention has for its object to design a backrest of the generic type so that assembly and disassembly is very easy, with one-piece production of the support plate on the one hand and the cover shell on the other hand should be possible.
  • Fig. 1 shows an office chair which has a base frame 1, which is supported by rollers 2 against the floor.
  • a height-adjustable chair column 3 is attached, at the upper end of which a seat support 4 is attached, on which in turn a seat 5 is attached.
  • the height of the chair column 3 is adjusted by means of an operating lever 6 mounted in the seat support 4.
  • a backrest support 7, which carries a backrest 8, is also mounted on the seat support 4.
  • the basic structure of the office chair described is generally known.
  • the height-adjustable chair column 3 is known for example from DE-PS 19 31 o12 (corresponding to US-PS 3 711 o54).
  • the structure of the seat support 4 including the described pivoting possibilities of the backrest 8 and seat 5 is known for example from EP-A1-o 179 185 (corresponding to US Pat. No. 4,966,412).
  • the seat support 4 can be partially optically covered by a panel 10 attached to the underside of the seat 5.
  • the backrest 8 has an inner support plate 11, which is covered on its front side facing the user with a padding 12. On its rear side 13 facing away from the user, it is provided with a cover shell 14 in a manner to be described in more detail.
  • the backrest support 7 is fastened to the back 13 of the support plate 11 by means of a horizontal swivel joint 15, so that - within predetermined limits - the backrest 8 can be pivoted relative to the backrest support 7.
  • Adjacent to the upper edge 19 of the support plate 11 and also symmetrical to the plane of symmetry 18 are holding hooks 2o, 2o 'on the rear 13 of the Support plate 11 attached.
  • the hooks 17, 17 ', 2o, 2o' are formed in one piece with the support plate 11 molded from plastic.
  • the cover shell 14 which is also injection molded from plastic, has on its inside 21 one-piece plate-shaped abutments 22, 22 'and 23, 23', which are assigned to the hooks 17, 17 ', 2o, 2o'.
  • the locking hooks 17, 17 ' are each assigned an abutment 22, 22', while the holding hooks 2o, 2o 'are assigned the abutments 23, 23' which are rigid against bending in the direction of the edges 16, 19 '.
  • the holding hooks 2o, 2o 'adjacent to the upper edge 19 have a rigid stand 24 attached to the support plate 11, on the upper side of which a plate-shaped projection directed toward the upper edge 19, approximately at right angles, is formed.
  • This projection 25 is assigned a receiving opening 26 in the abutment 23 or 23 'which is adapted in cross section.
  • the projection 25 has on its rear side 13 of the support plate 11 a guide surface 27 which is inclined from the free end 28 of the projection 25 in such a way that it approaches the rear side 13 and at the transition into the stand 24 the smallest distance from the back 13 has.
  • This projection 29 is also assigned a receiving opening 3o in each abutment 22, 22 'which is adapted in cross section.
  • each projection 29 On the side facing the rear side 13 of the support plate 11, each projection 29 has a holding surface 31 which runs approximately parallel to the rear side 13 and which has an undercut 32 at the transition to the stand 28.
  • the stands 24 and 28 each have a stop surface 33 and 34 for the abutments 23, 23 'and 22, 22'.
  • the distance a between the stop faces 33, 34 parallel to the plane of symmetry 18 is approximately equal to the distance a 'between the abutments 22, 23 and 22', 23 'also parallel to the plane of symmetry 18.
  • the extent b of the projections 25 from the stop surface 33 parallel to the plane of symmetry 18 is somewhat larger than the corresponding extension c of the projections 29.
  • FIGS. 4 to 6 The assembly of a cover shell 14 on the support plate 11 is shown in FIGS. 4 to 6.
  • the shell 14 is placed against the rear side 13 of the support plate 11, namely offset to the upper edge 19 in such a way that the abutments 23, 23 'with their receiving openings 26 arrive in front of the respectively assigned projection 25.
  • the cover shell 14 is then shifted slightly towards the lower edge 16 of the support plate 11 so that the projections 25 penetrate slightly into the respective receiving opening 26, as can be seen in FIG. 4, in this way far until the abutment 22 or 22 'comes to rest against the respective projection 29 of the locking hook 17 or 17'.
  • the upper edge 35 of the cover shell 14 facing the upper edge 19 now lies against the cushion strip 36 encompassing the upper edge 19, namely approximately flush with the rear side 13 of the support plate 11.
  • the lower edge 37 of the cover shell 14 is, however, still located at a distance from the rear 13 of the support plate 11.
  • the cover shell 14 is displaced relative to the support plate 11 in the direction of its lower edge 16, in accordance with the direction of the arrow 38.
  • the upper edge 35 of the cover shell 14 is thus also shifted towards the support plate 11, namely in overlap with the upper edge 19 of the support plate 11.
  • the cushion strip 36 is deformed here, as can be seen in FIG. 5.
  • the projection 29 bears against the respective abutment 22 or 22 ', so that the abutment 22 or 22' - as can be seen in FIG. 5 - is bent against the direction of the arrow 38.
  • the lower edge 37 of the cover shell 14 comes into engagement with the cushion strip 39 of the upholstery 12 encompassing the lower edge 16. However, it is still at a distance from the lower edge 16.
  • the lower edge 37 is then opened in accordance with the pressure arrow 4o the support plate 11 pressed out, whereby the receiving opening 3o of the abutment 22 or 22 'in front the projection 29 comes and correspondingly the projection 29 penetrates into the receiving opening 30, with elastic relaxation of the respective abutment 22 or 22 '.
  • the cover shell 14 comes into its covering position shown in FIG. 6, in which its lower edge 37 also covers the associated cushion strip 39 and deforms the lower edge 16 of the support plate 11.
  • the side edges 41 of the support plate 11 are naturally covered by the side edges 42 of the cover shell 14.
  • the assembly and disassembly takes place in the opposite direction, that is to say the assembly of the cover shell 14 relative to the support plate 11 from bottom to top and the disassembly accordingly from top to bottom, that is to say with elastic deformation of the upper edge 35.
  • the latching hooks 17, 17 ' would also be arranged in the region of the upper edge 19 and the retaining hooks 20, 20' in the region of the lower edge 16.
  • the upper edge 35 and the lower edge 37 of the cover shell 14 are also part of the elastic locking system, since these edges 35, 37 contribute to the cover shell 14 being in the locked state cannot be accidentally released from the support plate 11 without the use of force from the outside.

Abstract

A backrest (8) for a chair, specifically, in particular, an office chair, has a support plate (11) and a covering shell (14) attached to its rear side (13). With its edges (35, 37) said covering shell covers the support plate (11) in the region of its edges (16, 19). In order to allow simple assembly and demounting of the covering shell (14) on the support plate (11), hook connections (17, 20) are constructed between the support plate (11) and the covering shell (14) and are lockable or releasable by displacing the support plate (11) and the covering shell (14) relative and substantially parallel to one another. <IMAGE>

Description

Die Erfindung betrifft eine Rückenlehne für einen Stuhl, insbesondere einen Bürostuhl, entsprechend dem Oberbegriff des Anspruches 1.The invention relates to a backrest for a chair, in particular an office chair, according to the preamble of claim 1.

Bei bekannten Rückenlehnen der gattungsgemäßen Art ist die Abdeck-Schale mit pfeilspitzartigen Verriegelungszapfen, die also widerhakenartige Spitzen aufweisen, versehen, während an der Rückseite der Tragplatte entsprechend hinterschnittene Aufnahmehülsen für die Verriegelungszapfen vorgesehen sind. Die Herstellung ist relativ aufwendig, da die Verriegelungszapfen einerseits und die Aufnahmehülsen andererseits nicht aus billigem Kunststoff hergestellt werden können, sondern, wenn für die Tragplatte und die Abdeck-Schale selber jeweils relativ einfache Kunststoffe verwendet werden, angeklebt werden müssen. Darüber hinaus ist zwar die Montage der Abdeck-Schale an der Tragplatte relativ einfach wenn auch kraftaufwendig; ein Lösen ist aber nur sehr schwer möglich und führt meistens zu einem Abbrechen zumindest eines Teils der Verriegelungszapfen, so daß eine erneute Montage nicht zuverlässig möglich ist.In known backrests of the generic type, the cover shell is provided with arrow-shaped locking pins, which thus have barb-like tips, while correspondingly undercut receiving sleeves are provided for the locking pins on the back of the support plate. The production is relatively complex, since the locking pins on the one hand and the receiving sleeves on the other hand cannot be made from cheap plastic, but must be glued if relatively simple plastics are used for the support plate and the cover shell itself. In addition, the assembly of the cover shell on the support plate is relatively simple, although it takes a lot of effort; however, loosening is only possible with great difficulty and usually leads to a break-off of at least some of the locking pins, so that re-assembly is not reliably possible.

Der Erfindung liegt die Aufgabe zugrunde, eine Rückenlehne der gattungsgemäßen Art so auszugestalten, daß eine Montage und eine Demontage jeweils sehr einfach möglich ist, wobei eine einstückige Herstellung der Tragplatte einerseits und der Abdeck-Schale andererseits möglich sein soll.The invention has for its object to design a backrest of the generic type so that assembly and disassembly is very easy, with one-piece production of the support plate on the one hand and the cover shell on the other hand should be possible.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Die Tragplatte und die Abdeck-Schale werden durch Ineinanderschieben und gegebenenfalls Verrasten der Haken-Verbindungen miteinander verbunden bzw. im Grundsatz in umgekehrter Richtung voneinander gelöst. Eine besonders zuverlässige Halterung wird durch die Weiterbildung nach Anspruch 2 erreicht. Die Ansprüche 3 bis 1o geben zahlreiche zum Teil erfinderische Ausgestaltungen der Haken-Verbindungen an.This object is achieved by the features in the characterizing part of claim 1. The support plate and the cover shell are connected to one another by pushing one into the other and, if necessary, latching the hook connections, or in principle are detached from one another in the opposite direction. A particularly reliable holder is achieved by the development according to claim 2. Claims 3 to 1o indicate numerous, partly inventive, configurations of the hook connections.

Wie Anspruch 11 entnehmbar ist, ist es von besonderem Vorteil, wenn zumindest ein Teil der Ränder der Abdeck-Schale als elastische Glieder in das Verriegelungssystem eingebunden werden.As can be seen in claim 11, it is particularly advantageous if at least some of the edges of the cover shell are incorporated into the locking system as elastic members.

Zahlreiche Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigt

Fig. 1
einen Bürostuhl mit einer Rückenlehne,
Fig. 2
eine Draufsicht auf die Rückseite einer Tragplatte der Rückenlehne,
Fig. 3
eine Draufsicht auf die Innenseite einer Abdeck-Schale der Rücklehne,
Fig. 4
einen Querschnitt durch die Rückenlehne entsprechend der Schnittlinie IV-IV in Fig. 2 in einer Stellung von Abdeck-Schale und Tragplatte zueinander zu Beginn der Montage,
Fig. 5
einen Schnitt durch die Rückenlehne entsprechend Fig. 4 während der Montage,
Fig. 6
einen Schnitt durch die Rückenlehne entsprechend der Darstellung in den Fig. 4 und 5 am Ende der Montage und
Fig. 7
einen Schnitt durch die Rückenlehne entsprechend der Darstellung in den Fig. 4 bis 6 während der Demontage der Abdeck-Schale von der Tragplatte.
Numerous features, details and advantages of the invention result from the following description of an embodiment with reference to the drawing. It shows
Fig. 1
an office chair with a backrest,
Fig. 2
a plan view of the back of a support plate of the backrest,
Fig. 3
a plan view of the inside of a cover shell of the backrest,
Fig. 4
3 shows a cross section through the backrest in accordance with the section line IV-IV in FIG. 2 in a position of the cover shell and support plate relative to one another at the start of the assembly,
Fig. 5
3 shows a section through the backrest according to FIG. 4 during assembly,
Fig. 6
a section through the backrest as shown in FIGS. 4 and 5 at the end of assembly and
Fig. 7
a section through the backrest as shown in FIGS. 4 to 6 during the disassembly of the cover shell from the support plate.

Fig. 1 zeigt einen Bürostuhl, der ein Fußgestell 1 aufweist, das über Rollen 2 gegenüber dem Boden abgestützt ist. Auf dem Fußgestell 1 ist eine höhenverstellbare Stuhlstäule 3 angebracht, an deren oberem Ende ein Sitzträger 4 befestigt ist, auf dem wiederum ein Sitz 5 angebracht ist. Die Höhenverstellung der Stuhlsäule 3 erfolgt mittels eines im Sitzträger 4 gelagerten Bedienungshebels 6. Am Sitzträger 4 ist weiterhin ein Rückenlehnenträger 7 gelagert, der eine Rückenlehne 8 trägt. Zur Veränderung der Neigung des Rückenlehnenträgers 7 mit der Rückenlehne 8 - gegebenenfalls unter gleichzeitigem Verändern der Neigung des Sitzes 5 - ist ein weiterer Betätigungshebel 9 am Sitzträger 4 gelagert. Der geschilderte Grundaufbau des Bürostuhls ist allgemein bekannt. Die höhenverstellbare Stuhlsäule 3 ist beispielsweise aus der DE-PS 19 31 o12 (entsprechend US-PS 3 711 o54) bekannt. Der Aufbau des Sitzträgers 4 einschließlich der geschilderten Verschwenkmöglichkeiten von Rückenlehne 8 und Sitz 5 ist beispielsweise aus der EP-A1-o 179 185 (entsprechend US-PS 4 966 412) bekannt. Der Sitzträger 4 kann durch eine an der Unterseite des Sitzes 5 angebrachte Verkleidung 1o teilweise optisch abgedeckt sein.Fig. 1 shows an office chair which has a base frame 1, which is supported by rollers 2 against the floor. On the base frame 1, a height-adjustable chair column 3 is attached, at the upper end of which a seat support 4 is attached, on which in turn a seat 5 is attached. The height of the chair column 3 is adjusted by means of an operating lever 6 mounted in the seat support 4. A backrest support 7, which carries a backrest 8, is also mounted on the seat support 4. To change the inclination of the backrest support 7 with the backrest 8 - if necessary while simultaneously changing the inclination the seat 5 - a further actuating lever 9 is mounted on the seat support 4. The basic structure of the office chair described is generally known. The height-adjustable chair column 3 is known for example from DE-PS 19 31 o12 (corresponding to US-PS 3 711 o54). The structure of the seat support 4 including the described pivoting possibilities of the backrest 8 and seat 5 is known for example from EP-A1-o 179 185 (corresponding to US Pat. No. 4,966,412). The seat support 4 can be partially optically covered by a panel 10 attached to the underside of the seat 5.

Die Rückenlehne 8 weist eine innere Tragplatte 11 auf, die auf ihrer dem Benutzer zugewandten Vorderseite mit einer Polsterung 12 überzogen ist. Auf ihrer dem Benutzer abgewandten Rückseite 13 ist sie in noch genauer zu schildernder Weise mit einer Abdeck-Schale 14 versehen.The backrest 8 has an inner support plate 11, which is covered on its front side facing the user with a padding 12. On its rear side 13 facing away from the user, it is provided with a cover shell 14 in a manner to be described in more detail.

Der Rückenlehnenträger 7 ist an der Rückseite 13 der Tragplatte 11 mittels eines horizontalen Schwenkgelenks 15 befestigt, so daß - in vorgegebenen Grenzen - die Rückenlehne 8 gegenüber dem Rückenlehnenträger 7 verschwenkt werden kann. Benachbart zur Unterkante 16 der Tragplatte 11 ist jeweils beiderseits des Schwenkgelenks 15 ein Rast-Haken 17, 17' angebracht, wobei die beiden Haken 17, 17' spiegelsymmetrisch zur vertikalen Mittel-Längs-Symmetrieebene 18 der Rückenlehne 8 angeordnet sind. Benachbart zur Oberkante 19 der Tragplatte 11 und ebenfalls symmetrisch zur Symmetrieebene 18 sind Halte-Haken 2o, 2o' an der Rückseite 13 der Tragplatte 11 angebracht. Die Haken 17, 17', 2o, 2o' sind einstückig mit der aus Kunststoff gespritzten Tragplatte 11 ausgebildet.The backrest support 7 is fastened to the back 13 of the support plate 11 by means of a horizontal swivel joint 15, so that - within predetermined limits - the backrest 8 can be pivoted relative to the backrest support 7. Adjacent to the lower edge 16 of the support plate 11, a latching hook 17, 17 'is attached on both sides of the swivel joint 15, the two hooks 17, 17' being arranged mirror-symmetrically to the vertical central-longitudinal symmetry plane 18 of the backrest 8. Adjacent to the upper edge 19 of the support plate 11 and also symmetrical to the plane of symmetry 18 are holding hooks 2o, 2o 'on the rear 13 of the Support plate 11 attached. The hooks 17, 17 ', 2o, 2o' are formed in one piece with the support plate 11 molded from plastic.

Die ebenfalls aus Kunststoff gespritzte Abdeck-Schale 14 weist an ihrer Innenseite 21 einstückig mit ihr ausgebildete plattenförmige Widerlager 22, 22' und 23, 23' auf, die den Haken 17, 17', 2o, 2o' zugeordnet sind.The cover shell 14, which is also injection molded from plastic, has on its inside 21 one-piece plate-shaped abutments 22, 22 'and 23, 23', which are assigned to the hooks 17, 17 ', 2o, 2o'.

Den Rast-Haken 17, 17' ist jeweils ein Widerlager 22, 22' zugeordnet, während den Halte-Haken 2o, 2o' die gegen Verbiegungen in Richtung zu den Kanten 16, 19 steif ausgebildeten Widerlager 23, 23' zugeordnet sind.The locking hooks 17, 17 'are each assigned an abutment 22, 22', while the holding hooks 2o, 2o 'are assigned the abutments 23, 23' which are rigid against bending in the direction of the edges 16, 19 '.

Die der Oberkante 19 benachbarten Halte-Haken 2o, 2o' weisen einen an der Tragplatte 11 angebrachten biegefesten Ständer 24 auf, an dessen Oberseite ein zur Oberkante 19 hin gerichteter, etwa rechtwinklig abgewinkelter, plattenförmig ausgebildeter Vorsprung ausgebildet ist. Diesem Vorsprung 25 ist eine im Querschnitt angepaßte Aufnahme-Öffnung 26 im Widerlager 23 bzw. 23' zugeordnet. Der Vorsprung 25 weist an seiner der Rückseite 13 der Tragplatte 11 zugewandten Seite eine Führungsfläche 27 auf, die vom freien Ende 28 des Vorsprungs 25 aus derart geneigt ist, daß sie sich der Rückseite 13 nähert und am Übergang in den Ständer 24 den geringsten Abstand von der Rückseite 13 aufweist.The holding hooks 2o, 2o 'adjacent to the upper edge 19 have a rigid stand 24 attached to the support plate 11, on the upper side of which a plate-shaped projection directed toward the upper edge 19, approximately at right angles, is formed. This projection 25 is assigned a receiving opening 26 in the abutment 23 or 23 'which is adapted in cross section. The projection 25 has on its rear side 13 of the support plate 11 a guide surface 27 which is inclined from the free end 28 of the projection 25 in such a way that it approaches the rear side 13 and at the transition into the stand 24 the smallest distance from the back 13 has.

Die Rast-Haken 17, 17' weisen ebenfalls jeweils einen biegefesten Ständer 28 auf, an dessen der Rückseite 13 der Tragplatte 11 abgewandtem Ende ein plattenförmiger Vorsprung 29 in Richtung zur Oberkante 19 der Tragplatte 11 hin rechtwinklig abgewinkelt vorragt. Auch diesem Vorsprung 29 ist jeweils eine im Querschnitt angepaßte Aufnahme-Öffnung 3o in jedem Widerlager 22, 22' zugeordnet. An der der Rückseite 13 der Tragplatte 11 zugewandten Seite weist jeder Vorsprung 29 eine etwa parallel zur Rückseite 13 verlaufende Haltefläche 31 auf, die am Übergang zum Ständer 28 eine Hinterschneidung 32 aufweist. Auf ihrer den Vorsprüngen 25 bzw. 29 zugewandten Seite weisen die Ständer 24 und 28 jeweils eine Anschlagfläche 33 bzw. 34 für die Widerlager 23, 23' bzw. 22, 22' auf. Der Abstand a der Anschlagflächen 33, 34 parallel zur Symmetrieebene 18 ist etwa gleich dem Abstand a' der Widerlager 22, 23 bzw. 22', 23' ebenfalls parallel zur Symmetrieebene 18. Die Erstreckung b der Vorsprünge 25 von der Anschlagfläche 33 parallel zur Symmetrieebene 18 ist etwas größer als die entsprechende Erstreckung c der Vorsprünge 29.The latching hooks 17, 17 'each also have a bending-resistant stand 28, on the rear side 13 of which A plate-shaped projection 29 protrudes from the end facing away from the support plate 11 in the direction of the upper edge 19 of the support plate 11 and is angled at right angles. This projection 29 is also assigned a receiving opening 3o in each abutment 22, 22 'which is adapted in cross section. On the side facing the rear side 13 of the support plate 11, each projection 29 has a holding surface 31 which runs approximately parallel to the rear side 13 and which has an undercut 32 at the transition to the stand 28. On their side facing the projections 25 and 29, the stands 24 and 28 each have a stop surface 33 and 34 for the abutments 23, 23 'and 22, 22'. The distance a between the stop faces 33, 34 parallel to the plane of symmetry 18 is approximately equal to the distance a 'between the abutments 22, 23 and 22', 23 'also parallel to the plane of symmetry 18. The extent b of the projections 25 from the stop surface 33 parallel to the plane of symmetry 18 is somewhat larger than the corresponding extension c of the projections 29.

Die Montage einer Abdeck-Schale 14 an der Tragplatte 11 ist in den Fig. 4 bis 6 dargestellt. Wie Fig. 4 entnehmbar ist, wird die Schale 14 gegen die Rückseite 13 der Tragplatte 11 gesetzt, und zwar derart zur Oberkante 19 hin versetzt, daß die Widerlager 23, 23' mit ihren Aufnahme-Öffnungen 26 vor den jeweils zugeordneten Vorsprung 25 gelangen. Die Abdeck-Schale 14 wird dann geringfügig in Richtung zur Unterkante 16 der Tragplatte 11 hin verschoben, so daß die Vorsprünge 25 geringfügig in die jeweilige Aufnahme-Öffnung 26 eindringen, wie Fig. 4 zu entnehmen ist, und zwar so weit, bis das Widerlager 22 bzw. 22' zur Anlage vor dem jeweiligen Vorsprung 29 des Rast-Hakens 17 bzw. 17' gelangt. Der der Oberkante 19 zugewandte obere Rand 35 der Abdeck-Schale 14 liegt jetzt gegen den die Oberkante 19 umgreifenden Polsterstreifen 36 an, und zwar etwa bündig mit der Rückseite 13 der Tragplatte 11. Der untere Rand 37 der Abdeck-Schale 14 befindet sich dagegen noch im Abstand von der Rückseite 13 der Tragplatte 11. Nunmehr wird die Abdeck-Schale 14 relativ zur Tragplatte 11 in Richtung zu deren Unterkante 16 verschoben, und zwar entsprechend dem Schubrichtungspfeil 38. Hierbei gleitet das Widerlager 23, 23' auf der Führungsfläche 27 in Richtung zum Ständer 24 hin, bis es gegen dessen Anschlagfläche 33 zur Anlage kommt. Der obere Rand 35 der Abdeck-Schale 14 wird hierbei also auch zur Tragplatte 11 hin verschoben, und zwar in Überdeckung mit der Oberkante 19 der Tragplatte 11. Der Polsterstreifen 36 wird hierbei verformt, wie Fig. 5 entnehmbar ist.The assembly of a cover shell 14 on the support plate 11 is shown in FIGS. 4 to 6. As can be seen in FIG. 4, the shell 14 is placed against the rear side 13 of the support plate 11, namely offset to the upper edge 19 in such a way that the abutments 23, 23 'with their receiving openings 26 arrive in front of the respectively assigned projection 25. The cover shell 14 is then shifted slightly towards the lower edge 16 of the support plate 11 so that the projections 25 penetrate slightly into the respective receiving opening 26, as can be seen in FIG. 4, in this way far until the abutment 22 or 22 'comes to rest against the respective projection 29 of the locking hook 17 or 17'. The upper edge 35 of the cover shell 14 facing the upper edge 19 now lies against the cushion strip 36 encompassing the upper edge 19, namely approximately flush with the rear side 13 of the support plate 11. The lower edge 37 of the cover shell 14 is, however, still located at a distance from the rear 13 of the support plate 11. Now the cover shell 14 is displaced relative to the support plate 11 in the direction of its lower edge 16, in accordance with the direction of the arrow 38. Here, the abutment 23, 23 'slides on the guide surface 27 in the direction to the stand 24 until it comes to rest against its stop surface 33. The upper edge 35 of the cover shell 14 is thus also shifted towards the support plate 11, namely in overlap with the upper edge 19 of the support plate 11. The cushion strip 36 is deformed here, as can be seen in FIG. 5.

Bei dieser Verschiebung entsprechend dem Schubrichtungspfeil 38 liegt der Vorsprung 29 gegen das jeweilige Widerlager 22 bzw. 22' an, so daß das Widerlager 22 bzw. 22' - wie aus Fig. 5 ersichtlich ist - gegen den Schubrichtungspfeil 38 verbogen wird. Der untere Rand 37 der Abdeck-Schale 14 kommt hierbei in Eingriff mit dem die Unterkante 16 umgreifenden Polsterstreifen 39 der Polsterung 12. Er befindet sich aber noch im Abstand von der Unterkante 16. Anschließend wird der untere Rand 37 entsprechend dem Druckpfeil 4o in Richtung auf die Tragplatte 11 hin gedrückt, wodurch die Aufnahme-Öffnung 3o des Widerlagers 22 bzw. 22' vor den Vorsprung 29 kommt und entsprechend der Vorsprung 29 in die Aufnahme-Öffnung 3o eindringt, und zwar unter elastischer Entspannung des jeweiligen Widerlagers 22 bzw. 22'. Die Abdeck-Schale 14 kommt hierdurch in ihre in Fig. 6 dargestellte Verkleidungsstellung, in der auch ihr unterer Rand 37 den zugeordneten Polsterstreifen 39 verformend die Unterkante 16 der Tragplatte 11 überdeckt. In gleicher Weise werden naturgemäß die Seitenkanten 41 der Tragplatte 11 von den seitlichen Rändern 42 der Abdeck-Schale 14 überdeckt.During this shift according to the direction of the arrow 38, the projection 29 bears against the respective abutment 22 or 22 ', so that the abutment 22 or 22' - as can be seen in FIG. 5 - is bent against the direction of the arrow 38. The lower edge 37 of the cover shell 14 comes into engagement with the cushion strip 39 of the upholstery 12 encompassing the lower edge 16. However, it is still at a distance from the lower edge 16. The lower edge 37 is then opened in accordance with the pressure arrow 4o the support plate 11 pressed out, whereby the receiving opening 3o of the abutment 22 or 22 'in front the projection 29 comes and correspondingly the projection 29 penetrates into the receiving opening 30, with elastic relaxation of the respective abutment 22 or 22 '. As a result, the cover shell 14 comes into its covering position shown in FIG. 6, in which its lower edge 37 also covers the associated cushion strip 39 and deforms the lower edge 16 of the support plate 11. In the same way, the side edges 41 of the support plate 11 are naturally covered by the side edges 42 of the cover shell 14.

Zur Demontage der Abdeck-Schale 14 wird diese - wie aus Fig. 7 ersichtlich ist - im Bereich ihres unteren Randes 37 - entsprechend dem Druckpfeil 43 - leicht zur Rückseite 13 der Tragplatte 11 hin gedrückt, so daß das Widerlager 22 bzw. 22' außer Eingriff mit der Hinterschneidung 32 des jeweiligen Vorsprungs 29 kommt. Gleichzeitig wird ein stärkerer Druck in Richtung zur Oberkante 19 hin entsprechend dem Druckrichtungspfeil 44 auf den unteren Rand 37 der Schale 14 hin ausgeübt, so daß sich der die Unterkante 16 übergreifende untere Rand 37 elastisch entgegen dem Druckrichtungspfeil 44 verformt. Diese Verschiebebewegung wird so lange ausgeführt, bis die Aufnahme-Öffnung 3o des Widerlagers 22 bzw. 22' außer Eingriff mit dem Vorsprung 29 kommt, wie Fig. 7 entnehmbar ist. Dann kann der Bereich des unteren Randes 37 der Schale 14 entgegen dem Druckrichtungspfeil 43 von der Tragplatte 11 abgehoben werden und anschließend noch die Abdeck-Schale 14 so weit zur Oberkante 19 hin verschoben werden, bis auch die Widerlager 23, 23' außer Eingriff mit dem Vorsprung 25 der Halte-Haken 2o bzw. 2o' kommen.To disassemble the cover shell 14, this is - as can be seen from Fig. 7 - in the region of its lower edge 37 - according to the pressure arrow 43 - slightly pressed towards the rear 13 of the support plate 11, so that the abutment 22 and 22 'except Engagement with the undercut 32 of the respective projection 29 comes. At the same time, a greater pressure is exerted in the direction of the upper edge 19 in accordance with the direction of pressure arrow 44 on the lower edge 37 of the shell 14, so that the lower edge 37 overlapping the lower edge 16 is elastically deformed against the direction of pressure arrow 44. This displacement movement is carried out until the receiving opening 30 of the abutment 22 or 22 'disengages from the projection 29, as can be seen in FIG. 7. Then the area of the lower edge 37 of the shell 14 can be lifted against the pressure direction arrow 43 from the support plate 11 and then the cover shell 14 can be moved so far towards the upper edge 19 until the abutments 23, 23 'out of engagement with the Projection 25 of the holding hooks 2o and 2o 'come.

Es ist auch denkbar, daß die Montage und Demontage in umgekehrter Richtung, also die Montage der Abdeck-Schale 14 relativ zur Tragplatte 11 von unten nach oben und die Demontage entsprechend von oben nach unten, also unter elastischer Verformung des oberen Randes 35 erfolgt. In diesem Fall wären auch die Rast-Haken 17, 17' im Bereich der Oberkante 19 und die Halte-Haken 2o, 2o' im Bereich der Unterkante 16 angeordnet.It is also conceivable that the assembly and disassembly takes place in the opposite direction, that is to say the assembly of the cover shell 14 relative to the support plate 11 from bottom to top and the disassembly accordingly from top to bottom, that is to say with elastic deformation of the upper edge 35. In this case, the latching hooks 17, 17 'would also be arranged in the region of the upper edge 19 and the retaining hooks 20, 20' in the region of the lower edge 16.

Wie sich aus den vorstehenden Darlegungen ergibt, sind zumindest der obere Rand 35 und der untere Rand 37 der Abdeck-Schale 14 ebenfalls mit Bestandteil des elastischen Verriegelungssystems, da diese Ränder 35, 37 mit dazu beitragen, daß die Abdeck-Schale 14 in verriegeltem Zustand ohne gezielten Krafteinsatz von außen nicht versehentlich wieder von der Tragplatte 11 gelöst werden kann.As can be seen from the above, at least the upper edge 35 and the lower edge 37 of the cover shell 14 are also part of the elastic locking system, since these edges 35, 37 contribute to the cover shell 14 being in the locked state cannot be accidentally released from the support plate 11 without the use of force from the outside.

Aufgrund der den Fig. 1, 2, 3 entnehmbaren Verjüngung der Rückenlehne 8 nach oben ist aber die geschilderte Ausführungsform die günstigste.Due to the taper of the backrest 8, which can be seen in FIGS. 1, 2, 3, the embodiment described is the cheapest.

Claims (13)

Rückenlehne für einen Stuhl, insbesondere für einen Bürostuhl, mit einer Tragplatte (11) und einer an deren Rückseite (13) angebrachten Abdeck-Schale (14), die mit ihren Rändern (35, 37, 42) die Tragplatte (11) im Bereich ihrer Kanten (16, 19, 41) abdeckt, dadurch gekennzeichnet, daß zwischen der Tragplatte (11) und der Abdeck-Schale (14) Haken-Verbindungen ausgebildet sind, die durch Verschiebung der Tragplatte (11) und der Abdeck-Schale (14) relativ und im wesentlichen parallel zueinander schließbar bzw. lösbar sind.Backrest for a chair, in particular for an office chair, with a support plate (11) and a cover shell (14) attached to the rear side (13) thereof, the edges (35, 37, 42) of the support plate (11) in the area of their edges (16, 19, 41), characterized in that hook connections are formed between the support plate (11) and the cover shell (14), which are made by displacing the support plate (11) and the cover shell (14 ) can be closed or detached relatively and essentially parallel to one another. Rückenlehne nach Anspruch 1, dadurch gekennzeichnet, daß mindestens zwei in Richtung der Verschiebung (38) im Abstand (a, a') voneinander angeordnete Haken-Verbindungen vorgesehen sind.Backrest according to Claim 1, characterized in that at least two hook connections arranged at a distance (a, a ') from one another in the direction of the displacement (38) are provided. Rückenlehne nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jede Haken-Verbindung einen Haken (17, 17', 2o, 2o') und ein Widerlager (22, 22', 23, 23') aufweist, die an der Tragplatte (11) bzw. der Abdeck-Schale (14) angebracht sind.Backrest according to claim 1 or 2, characterized in that each hook connection has a hook (17, 17 ', 2o, 2o') and an abutment (22, 22 ', 23, 23') which are attached to the support plate (11 ) or the cover shell (14) are attached. Rückenlehne nach Anspruch 3, dadurch gekennzeichnet, daß mindestens ein Haken als Rast-Haken (17, 17') ausgebildet ist.Backrest according to claim 3, characterized in that at least one hook is designed as a latching hook (17, 17 '). Rückenlehne nach Anspruch 3, dadurch gekennzeichnet, daß mindestens ein Haken als Halte-Haken (2o, 2o') ausgebildet ist.Backrest according to claim 3, characterized in that at least one hook is designed as a holding hook (2o, 2o '). Rückenlehne nach Anspruch 3, dadurch gekennzeichnet, daß jeder Haken (17, 17', 2o, 2o') einen Ständer (28, 24) mit einem Vorsprung (29, 25) aufweist und daß jedes Widerlager (22, 22', 23, 23') eine Aufnahme-Öffnung (3o, 26) zur Aufnahme eines Vorsprungs (29, 25) aufweist.Backrest according to claim 3, characterized in that each hook (17, 17 ', 2o, 2o') has a stand (28, 24) with a projection (29, 25) and in that each abutment (22, 22 ', 23, 23 ') has a receiving opening (3o, 26) for receiving a projection (29, 25). Rückenlehne nach Anspruch 4 und 6, dadurch gekennzeichnet, daß der Rast-Haken (17, 17') an einer der Tragplatte (11) zugewandten Haltefläche (31) des Vorsprungs (29) eine Hinterschneidung (32) zur Aufnahme des Widerlagers (22, 22') aufweist.Backrest according to Claims 4 and 6, characterized in that the latching hook (17, 17 ') has an undercut (32) on a holding surface (31) of the projection (29) facing the support plate (11) for receiving the abutment (22, 22 '). Rückenlehne nach Anspruch 5 und 6, dadurch gekennzeichnet, daß der Vorsprung (25) des Halte-Hakens (2o, 2o') eine zur Tragplatte (11) hin geneigt verlaufende Führungsfläche (27) aufweist.Backrest according to claims 5 and 6, characterized in that the projection (25) of the holding hook (2o, 2o ') has a guide surface (27) which is inclined towards the support plate (11). Rückenlehne nach Anspruch 6, dadurch gekennzeichnet, daß die Erstreckung (b) des Vorsprungs (25) des Halte-Hakens (2o, 2o') entgegen der Richtung der Verschiebung (38) etwas größer ist als die Erstreckung (c) des Vorsprungs (29) des Rast-Hakens (17, 17').Backrest according to claim 6, characterized in that the extension (b) of the projection (25) of the holding hook (2o, 2o ') against the direction of the displacement (38) is somewhat larger than the extension (c) of the projection (29 ) of the locking hook (17, 17 '). Rückenlehne nach Anspruch 9, dadurch gekennzeichnet, daß das Widerlager (22, 22') des Rast-Hakens (17, 17') entgegen der Richtung der Verschiebung (38) elastisch verformbar ist.Backrest according to claim 9, characterized in that the abutment (22, 22 ') of the latching hook (17, 17') is elastically deformable against the direction of the displacement (38). Rückenlehne nach einem der Ansprüche 1 bis 1o, dadurch gekennzeichnet, daß mindestens der in Richtung der Verschiebung (38) liegende Rand (unterer Rand 37) der Abdeck-Schale (14) elastisch verformbar ist.Backrest according to one of claims 1 to 1o, characterized in that at least the edge (lower edge 37) of the cover shell (14) lying in the direction of the displacement (38) is elastically deformable. Rückenlehne nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Tragplatte (11) mit einer Polsterung (12) versehen ist, die die Kanten (16, 19, 41) der Tragplatte (11) mit Polsterstreifen (36, 39) umgreift.Backrest according to one of claims 1 to 11, characterized in that the support plate (11) is provided with padding (12) which surrounds the edges (16, 19, 41) of the support plate (11) with cushion strips (36, 39) . Rückenlehne nach Anspruch 12, dadurch gekennzeichnet, daß die Ränder (35, 37, 42) der Abdeck-Schale (14) an den Polsterstreifen (36, 39) anliegen.Backrest according to claim 12, characterized in that the edges (35, 37, 42) of the cover shell (14) bear against the cushion strips (36, 39).
EP92101671A 1991-03-08 1992-02-01 Backrest for a chair Withdrawn EP0503262A1 (en)

Applications Claiming Priority (2)

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DE4107451 1991-03-08
DE4107451A DE4107451C2 (en) 1991-03-08 1991-03-08 Backrest for a chair

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NO920669D0 (en) 1992-02-20
US5326155A (en) 1994-07-05
NO920669L (en) 1992-09-09
DE4107451C2 (en) 2003-04-10
DE4107451A1 (en) 1992-09-10

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