EP2110052A1 - Back rest section for a seat - Google Patents

Back rest section for a seat Download PDF

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Publication number
EP2110052A1
EP2110052A1 EP09158185A EP09158185A EP2110052A1 EP 2110052 A1 EP2110052 A1 EP 2110052A1 EP 09158185 A EP09158185 A EP 09158185A EP 09158185 A EP09158185 A EP 09158185A EP 2110052 A1 EP2110052 A1 EP 2110052A1
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EP
European Patent Office
Prior art keywords
ribs
shell
openings
back shell
shell according
Prior art date
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Granted
Application number
EP09158185A
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German (de)
French (fr)
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EP2110052B1 (en
Inventor
Peter Tobler
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Sitag AG
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Provenda Marketing AG
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Publication date
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Publication of EP2110052A1 publication Critical patent/EP2110052A1/en
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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
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/405—Support for the head or the back for the back with double backrests

Definitions

  • the invention relates to a backrest part for a passenger seat, in particular an office chair.
  • a chair back center piece is known, the upper part is more resistant to bending than its lower part.
  • This centerpiece has a central area that accompanies the spine and is bendable around horizontal axes. And he has laterally from this projecting ribs.
  • the ribs are connected to each other by bellows connections, or separated by slots. At the middle part they are arranged over webs. The ribs are therefore movable against each other and follow the bends of the central area. At the same time they are bent forward and support the back from the side. In doing so, they bend around vertical axes to the pressure of the back and adapt to the back course by turning in the webs.
  • This chair back center piece needs to be upholstered.
  • the pad must be able to absorb the movements of the individual ribs against each other. However, these movements are of an order of magnitude unsuitable for upholstery, even if the rib pitch is narrow, so that 11 ribs per side are provided. These narrow ribs are also sensitive to individual loads.
  • the object of the invention to provide a backrest that allows a similarly dynamic support of the back and can accommodate higher single loads in the individual ribs and still follow the movement of the middle part.
  • this document uses “longitudinal” as an orientation parallel to the spine direction, and “transverse” perpendicular to it, parallel to a line from side to side of the seat back shell.
  • the shell accordingly has, in a known manner, a central part which supports a spinal column along a spine in the longitudinal direction and is stretched between upper and lower attachment points, and ribs which protrude laterally from the central part.
  • the ribs are separated by lateral incisions from each other, bent forward and thus formed against each other movable.
  • elongated openings are formed in this shell in the central part, which extend in the transverse direction and terminate at both ends between two longitudinally adjacent side incisions.
  • This has the advantage that the ribs are each connected via two webs to the central part, and the middle part between these two webs interrupted and therefore is very flexible. This allows relatively large dimensions of the ribs in the longitudinal direction without obstructing their mobility due to a change in curvature of the central part.
  • the middle part is divided by the elongated openings in web areas. Longitudinally adjacent web areas are not directly connected to each other, but are connected via the webs with the ribs, which link the adjacent land areas elastically with each other. This has the consequence that bends in the longitudinal direction, which follow the back course, in their change in each case the ribs must include in this change.
  • the bending of the material therefore extends over two meandering strips in the transition between middle part and ribs.
  • This meandering shape of the force transferring strips has the advantage that the deformation of the shell occurs along a longer line than if the strip were stretched. The deformation is therefore less per length.
  • there is a distortion of the shell in the webs so that in the deformation equal to the ribs are included as the web portions of the central part with.
  • Two longitudinally adjacent torsions are in opposite directions. A change in length due to bending changes of the shell is taken in the region of these openings.
  • the rigidity and bendability of the shell can not be just about the thickness of the shell Material of the shell, but also about the dimensions of the incisions and openings are designed.
  • the shell is arranged in juxtaposed thirds approximately the same width.
  • the middle third are formed by the middle part and the outer third by the ribs. This threefold has the advantage that in a transversely slightly arched middle region, the flexibility is given in the longitudinal direction, and in a more curved in the transverse direction edge region, the flexibility of the individual ribs and transverse direction is given.
  • the ends of the incisions and the ends of the openings terminate in two areas which extend parallel to the longitudinal direction.
  • the end of the incision and the end of the opening in the transverse direction expediently have a distance of between 2 cm and -6 cm.
  • Two centimeters apart means that there are two longitudinal strips of 2 cm each between the middle section and the ribs.
  • Minus six inches distance means that the incisions and openings overlap by six inches.
  • Advantageous embodiments are when the ends have a distance in the transverse direction of 1 to -3 cm, more preferably, a distance of ⁇ 0.5 cm. Distances of the ends between 0 and a small overlap are particularly preferred. In the illustrated preferred embodiment, the ends of openings and notches are practically on a straight line.
  • the shell is curved in a known manner in the transverse direction concave to cover the back. In a central region, this curvature is less formed than in the side regions with the ribs. Over the length of the openings, the shell has a front concave curvature of conveniently at most 1 cm. A stronger curvature of the shell in the middle part is more resistant to its bendability around transverse axes. A lesser curvature is already perceived as no longer following the dorsal curvature. This provision is less intended for the determination of the curvature, but more to determine the length of the openings.
  • these numbers can also be increased or decreased by one, without deviating from the basic constructive idea. It is essential that the ribs clearly flat elements are, and that they go over with two flat webs in two adjacent land areas of the middle part. This flatness of the areas is no longer given at high numbers of ribs and openings. For smaller numbers, however, the desired flexibility of the back shell is no longer given. The individual ribs then become independent in their movement under load.
  • attachment points for attaching the shell are formed on a support member on the central part. Particularly useful is their training two land areas of the middle part, namely the second top and the bottom land area. An attachment in the openings is also conceivable.
  • the shell in position to a support member, while the other allow mobility of the shell relative to the support member.
  • the attachment in upper attachment points define the shell in its position to a support member.
  • the attachment in lower attachment points of the shell allow mobility with respect to the position of the support member. This mobility in lower attachment points has the advantage that the Boss buckle is more influenced, as if this mobility would not exist in the lower attachment points.
  • the determination of the relative position in the upper attachment points is also expedient because in the thoracic spine area, the smaller bending differences are necessary and the back shell extends beyond the attachment points. The radius of the curvature in the longitudinal direction of the back shell can thus be increased by the upper attachment points under load.
  • a padding can be provided. This is conveniently in horizontal stripes. These strips extend from rib to rib in the transverse direction.
  • FIGS. 1 to 3 illustrated back shell 11 have a left side 13 with ribs 15 and cuts 17 between the ribs, a central part 19 through openings 21 between web portions 23, and a right side 25 with ribs 15 and cuts 17.
  • the openings 21 are each at the level of Ribs 15 arranged.
  • the cuts 17 are each arranged at the level of the web portions 23.
  • This results in a meandering area line 29 (shown on one side as a gray serpentine line), which meanders around the ends of the openings and notches.
  • This surface line 29 is formed symmetrically to a longitudinally extending axis of symmetry of the back shell on both sides.
  • FIG. 1 is a version shown in which the ends of the recesses 17 and the ends of the elongated openings 21 in the middle part 19 have a positive distance.
  • This neutral zone can not undergo longitudinal change in length when the Back shell is bent under load.
  • the effective for the transmission of web portion 23 on rib 15 and rib 15 on web portion 23 effective cross section of the back shell, that is, the cross section of the webs 27 between the ribs 15 and the web portions 23 is wider than the width of the neutral zone forming strip.
  • an elastic connection of ribs 15 and middle part 19 is provided, which couples both the central part 19 with the ribs 15, as well as the middle part a bendability about axes in the transverse direction and the ribs granted a bendability about axes in the longitudinal direction.
  • This elastic connection can be influenced by the fact that the length of the webs is selected. With longer webs, the shell becomes more mobile, with shorter stiffer ones. Longer webs arise when the ends of the openings and the ends of the sipes come closer to each other or even overlap.
  • FIG. 2 a variant of a back shell 11 is shown, in which the incisions 17 and the openings 21 in the transverse direction of the shell 11 overlap each other.
  • the width of the webs 27 can also be influenced by the pitch (number of cuts and land areas, or ribs and openings), the width of the cuts and the width of the openings.
  • the serpentine line 29, along which the forces are transmitted longitudinally, is longer than in FIG. 1 , This results in a smaller distortion of the cross section of the webs 27 per length.
  • the openings 21 and cuts 17 do not have to, as in Figures 1 and 2 shown, end in straight lines. They can also be different in length. They may also have more angular shapes. To illustrate these facts, the FIG. 3 , The openings 21 have three areas: a middle with a longitudinally larger dimension, and two side areas with a longitudinally smaller dimension.
  • the incisions 17 have two areas, namely an outer with a longitudinally smaller dimension and an inner with a longitudinal direction of a larger dimension. The dimensioning of these regions can influence the strength of the serpentine line region which transmits forces in the longitudinal direction. In a boss area, the cutouts are made smaller than in the chest area. The cuts and openings partially overlap, but not everywhere.
  • the first and bottom openings do not overlap with the first and bottom notches.
  • the second opening overlaps with the first cuts, but with the second still more. Most of the 4th opening overlaps with the adjacent cuts.
  • the 5 and 6th openings overlap less again. In this way, the stiffness can be influenced in different areas.
  • the serpentine line 29, along which the forces are transmitted longitudinally, has areas in which it will swing out far and thus form a softer shell, and areas where it is more elongate, and therefore form a harder shell 11.
  • the incisions are narrower in the outer area than in the inner area. Only in the inner region, the width of the cuts 17 affects the width of the webs 27. By this shaping of the incisions, therefore, the mobility of the shell can be influenced without thereby limiting the width of the ribs.
  • the ribs 15 are split so that they have two ends.
  • attachment points 31,33 located. These lie on land areas 21, on the second top and the bottom land area.
  • FIG. 4 the attachment of the shell 11 is shown on a support member 35.
  • the shell 11 is mounted at the upper attachment points 31 angle rigid or rotatable. In the lower attachment points 33, however, it is articulated with a lever 37 on the carrier part 35.
  • This lever 37 allows an extension of the boss and House Schlsschwölbung the shell 11.
  • the lever 37 is conveniently spring-loaded to tension the shell 11 in front.
  • FIGS. 5 to 9 a preferred embodiment is shown.
  • This again has the middle part 19, connect to the side ribs 15.
  • the incisions 17 between the ribs 15 are conically tapered inwardly.
  • the openings 21 in the middle part 19 extend to the ends of the incisions 27 zoom. There is neither a clear overlap nor a clear distance. Visually, the ends act on a straight line.
  • the rear shell 11 is formed with Boss vaulting and House Kunststoffswölbung and thus forms a lumbar support.
  • the curvature of the lumbar support is load-dependent, since the material of the shell is elastically flexible.
  • the serpentine area (not shown here), over which the forces on the upper and lower attachment points 31, 33 are removed, is thereby verwindbar. This allows the lumbar support, the actual buckling of a to follow a lean back. By pressure on the Bossvölbung this is flattened and an area arched over it. By pressing on this happens the reverse.
  • the shell via rubber buffer (not shown) is attached to the support member 35.
  • the back shell 11 can be wound in total, for example, if a shoulder presses on one side against the uppermost ribs.
  • the ribs are how out FIGS. 6 and 8th visible, different degrees bent forward. They grasp the back in the boss area more than in the shoulder area.
  • FIGS. 8 and 9 is the back shell once without padding ( FIG. 8 ) and once with padding 39 ( Fig. 9 ).
  • the padding 39 consists of strips which are laid across the shell. They extend from the left to the right edge of the shell and into the ends of the ribs. They cover the openings. These openings are then visible only on the back of the shell.
  • the cushion strips are individually attached to the shell.
  • the two bottom upholstery strips are combined to give a waistband and a belt no possibility for hanging in the second lowermost cushion strip.
  • the cushion strips are firmly connected at their ends with the ribs. In the middle area, they are connected to the web areas in such a way that movement of the padding strips in the longitudinal direction is prevented, but there is little mobility between the web areas and the padding strip.

Abstract

The shell (11) has a middle section (19) supporting a back in a longitudinal direction and includes a set of ribs (15) that laterally protrude in the transverse direction from the middle section. The ribs are separated from each other by lateral notches (17) and are bent forward, and movable against each other. Openings (21) are formed in the middle section, where opening run in transverse direction and stop between ends of lateral notches adjoining in longitudinal direction. Ends of notches and the ends of the openings lie in two regions.

Description

Die Erfindung betrifft ein Rückenlehnenteil für einen Personensitz, insbesondere einen Bürostuhl.The invention relates to a backrest part for a passenger seat, in particular an office chair.

Aus der WO 02/ 071900 ist ein Stuhlrücken-Kernstück bekannt, dessen oberer Teil gegen biegen wiederstandsfähiger ist als dessen unterer Teil. Dieses Kernstück besitzt einen mittleren Bereich, der die Wirbelsäule begleitet und um horizontale Achsen biegbar ist. Und er besitzt seitlich von diesem abstehende Rippen. Die Rippen sind miteinander mittels balgartigen Verbindungen verbunden, oder aber durch Schlitze getrennt. Am mittleren Teil sind sie über Stege angeordnet. Die Rippen sind daher gegeneinander beweglich und folgen den Biegungen des mittleren Bereichs. Gleichzeitig sind sie nach vorne hin gebogen und stützen den Rücken seitlich ab. Dabei geben sie um vertikale Achsen biegend einem Druck des Rückens nach und passen sich dem Rückenverlauf durch ein Drehen in den Stegen an.From WO 02/071900 a chair back center piece is known, the upper part is more resistant to bending than its lower part. This centerpiece has a central area that accompanies the spine and is bendable around horizontal axes. And he has laterally from this projecting ribs. The ribs are connected to each other by bellows connections, or separated by slots. At the middle part they are arranged over webs. The ribs are therefore movable against each other and follow the bends of the central area. At the same time they are bent forward and support the back from the side. In doing so, they bend around vertical axes to the pressure of the back and adapt to the back course by turning in the webs.

Dieses Stuhlrücken-Kernstück muss gepolstert werden. Dabei muss das Polster die Bewegungen der einzelnen Rippen gegeneinander aufnehmen können. Diese Bewegungen sind indes in einer Grössenordnung, die für Polster ungeeignet sind, selbst wenn die Rippenteilung eng ist, so dass 11 Rippen pro Seite vorgesehen sind. Diese schmalen Rippen sind zudem empfindlich gegenüber Einzelbelastungen.This chair back center piece needs to be upholstered. The pad must be able to absorb the movements of the individual ribs against each other. However, these movements are of an order of magnitude unsuitable for upholstery, even if the rib pitch is narrow, so that 11 ribs per side are provided. These narrow ribs are also sensitive to individual loads.

Ausgehend von diesem Stand der Technik ist die Aufgabe der Erfindung, eine Rückenlehne zu schaffen, die eine ähnlich dynamische Abstützung des Rückens erlaubt und bei die einzelnen Rippen höhere Einzellasten aufnehmen können und dennoch der Bewegung des Mittelteils folgen.Based on this prior art, the object of the invention to provide a backrest that allows a similarly dynamic support of the back and can accommodate higher single loads in the individual ribs and still follow the movement of the middle part.

Für eine klare Ausdrucksweise wird in dieser Schrift "in Längsrichtung" gebraucht als eine Ausrichtung parallel zur Wirbelsäulenrichtung, und "in Querrichtung" senkrecht zu dieser, parallel zu einer Linie von Seite zu Seite der Rückenlehnenschale verlaufend.For a clear language, this document uses "longitudinal" as an orientation parallel to the spine direction, and "transverse" perpendicular to it, parallel to a line from side to side of the seat back shell.

Diese Aufgabe wird bei einer elastisch verformbaren Stuhlrücken-Schale gemäss dem Oberbegriff des Anspruchs 1 erfindungsgemäss durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Die Schale besitzt demnach in bekannter Art einen Mittelteil, der einer Wirbelsäule entlang einen Rücken in Längsrichtung stützt und zwischen oberen und unteren Befestigungspunkten aufgespannt ist, und Rippen, die seitlich vom Mittelteil abstehen. Die Rippen sind durch seitliche Einschnitte von einander getrennt, nach vorne gebogen und somit gegeneinander beweglich ausgebildet.This object is achieved with an elastically deformable chair back shell according to the preamble of claim 1 according to the invention by the characterizing features of claim 1. The shell accordingly has, in a known manner, a central part which supports a spinal column along a spine in the longitudinal direction and is stretched between upper and lower attachment points, and ribs which protrude laterally from the central part. The ribs are separated by lateral incisions from each other, bent forward and thus formed against each other movable.

Zur Lösung der Aufgabe sind bei dieser Schale im Mittelteil längliche Öffnungen ausgebildet, die in Querrichtung verlaufen und an beiden Enden zwischen zwei in Längsrichtung einander benachbarten seitlichen Einschnitten enden. Dies hat den Vorteil, dass die Rippen jeweils über zwei Stege mit dem Mittelteil verbunden sind, und das Mittelteil zwischen diesen beiden Stegen unterbrochen und daher sehr beweglich ist. Dies erlaubt relativ grosse Abmessungen der Rippen in der Längsrichtung ohne Behinderung von deren Beweglichkeit infolge einer Krümmungsänderung des Mittelteils. Der Mittelteil ist durch die länglichen Öffnungen in Stegbereiche unterteilt. In Längsrichtung benachbarte Stegbereiche sind nicht direkt miteinander verbunden, sondern sind über die Stege mit den Rippen verbunden, welche die benachbarten Stegbereiche elastisch miteinander verknüpfen. Dies hat zur Folge, dass Biegungen in der Längsrichtung, die dem Rückenverlauf folgen, bei ihrer Veränderung jeweils die Rippen mit in diese Veränderung einbeziehen müssen.To solve the problem elongated openings are formed in this shell in the central part, which extend in the transverse direction and terminate at both ends between two longitudinally adjacent side incisions. This has the advantage that the ribs are each connected via two webs to the central part, and the middle part between these two webs interrupted and therefore is very flexible. This allows relatively large dimensions of the ribs in the longitudinal direction without obstructing their mobility due to a change in curvature of the central part. The middle part is divided by the elongated openings in web areas. Longitudinally adjacent web areas are not directly connected to each other, but are connected via the webs with the ribs, which link the adjacent land areas elastically with each other. This has the consequence that bends in the longitudinal direction, which follow the back course, in their change in each case the ribs must include in this change.

Die Biegung des Material erstreckt sich daher über zwei mäandernde Streifen im Übergang zwischen Mittelteil und Rippen. Diese mäandernde Form der die Kräfte übertragenden Streifen hat den Vorteil, dass die Verformung der Schale entlang einer längeren Linie geschieht, als wenn der Streifen gestreckt wäre. Die Verformung ist daher pro Längenabschnitt geringer. Zudem ergibt sich eine Verwindung der Schale in den Stegen, so dass in die Verformung gleichermassen die Rippen wie die Stegbereiche des Mittelteil mit einbezogen sind. Zwei in Längsrichtung benachbarte Verwindungen sind jeweils gegenläufig. Eine Längenveränderungen in Folge von Biegungsänderungen der Schale wird im Bereich dieser Öffnungen aufgenommen.The bending of the material therefore extends over two meandering strips in the transition between middle part and ribs. This meandering shape of the force transferring strips has the advantage that the deformation of the shell occurs along a longer line than if the strip were stretched. The deformation is therefore less per length. In addition, there is a distortion of the shell in the webs, so that in the deformation equal to the ribs are included as the web portions of the central part with. Two longitudinally adjacent torsions are in opposite directions. A change in length due to bending changes of the shell is taken in the region of these openings.

Es hat sich gezeigt, dass mit einer solchen Ausbildung der Schale eine elastische, und bezüglich Steifigkeit gut dimensionierbare Kunststoffform gefunden wurde. Die Steifigkeit und Biegbarkeit der Schale kann nicht nur über die Dicke des Materials der Schale, sondern auch über die Dimensionen der Einschnitte und Öffnungen gestaltet werden.It has been shown that with such a design of the shell an elastic, and with respect to rigidity well dimensionable plastic mold was found. The rigidity and bendability of the shell can not be just about the thickness of the shell Material of the shell, but also about the dimensions of the incisions and openings are designed.

Vorteilhaft ist die Schale in neben einander angeordnete Drittel annähernd gleicher Breite gegliedert. Von diesen sind das mittlere Drittel durch den Mittelteil und die äusseren Drittel durch die Rippen gebildet. Diese Drittelung hat den Vorteil, dass in einem in Querrichtung wenig gewölbten Mittelbereich die Biegbarkeit in Längsrichtung gegeben ist, und in einem in Querrichtung stärker gewölbten Randbereich die Biegbarkeit der einzelnen Rippen auch Querrichtung gegeben ist.Advantageously, the shell is arranged in juxtaposed thirds approximately the same width. Of these, the middle third are formed by the middle part and the outer third by the ribs. This threefold has the advantage that in a transversely slightly arched middle region, the flexibility is given in the longitudinal direction, and in a more curved in the transverse direction edge region, the flexibility of the individual ribs and transverse direction is given.

Die Enden der Einschnitte und die Enden der Öffnungen enden in zwei Bereichen, die sich parallel zur Längsrichtung erstrecken. Dabei haben das Ende des Einschnittes und das Ende der Öffnung in Querrichtung zweckmässigerweise einen Abstand von einander zwischen 2 cm und -6 cm. Zwei Zentimeter Abstand bedeutet, dass zwei in Längsrichtung verlaufende Streifen von je 2 cm Breite zwischen dem Mittelteil und den Rippen vorhanden sind. Minus sechs Zentimeter Abstand bedeutet, dass die Einschnitte und die Öffnungen um sechs Zentimeter überlappen. Vorteilhafte Ausführungen sind, wenn die Enden einen Abstand in Querrichtung von 1 bis -3 cm haben, besonders bevorzugt wird ein Abstand von ± 0.5 cm. Abstände der Enden zwischen 0 und einer geringen Überlappung sind besonders bevorzugt. Im dargestellten bevorzugten Ausführungsbeispiel liegen die Enden von Öffnungen und Einschnitten praktisch auf einer gestreckten Linie.The ends of the incisions and the ends of the openings terminate in two areas which extend parallel to the longitudinal direction. The end of the incision and the end of the opening in the transverse direction expediently have a distance of between 2 cm and -6 cm. Two centimeters apart means that there are two longitudinal strips of 2 cm each between the middle section and the ribs. Minus six inches distance means that the incisions and openings overlap by six inches. Advantageous embodiments are when the ends have a distance in the transverse direction of 1 to -3 cm, more preferably, a distance of ± 0.5 cm. Distances of the ends between 0 and a small overlap are particularly preferred. In the illustrated preferred embodiment, the ends of openings and notches are practically on a straight line.

Die Schale ist in bekannter Art in Querrichtung konkav gewölbt, um den Rücken zu umfassen. In einem mittleren Bereich ist diese Wölbung geringer ausgebildet als in den Seitenbereichen mit den Rippen. Über die Länge der Öffnungen weist die Schale eine vorderseitig konkave Wölbung von zweckmässigerweise maximal 1 cm auf. Eine stärkere Wölbung der Schale im Mittelteil steht ihrer Biegbarkeit um in Querrichtung verlaufende Achsen stärker entgegen. Eine geringere Wölbung wird bereits als nicht mehr der Rückenwölbung folgend empfunden. Diese Massgabe ist weniger für die Bestimmung der Wölbung gedacht, sondern mehr zur Bestimmung der Länge der Öffnungen.The shell is curved in a known manner in the transverse direction concave to cover the back. In a central region, this curvature is less formed than in the side regions with the ribs. Over the length of the openings, the shell has a front concave curvature of conveniently at most 1 cm. A stronger curvature of the shell in the middle part is more resistant to its bendability around transverse axes. A lesser curvature is already perceived as no longer following the dorsal curvature. This provision is less intended for the determination of the curvature, but more to determine the length of the openings.

Bevorzugt werden fünf Öffnungen zwischen sechs Stegbereichen des Mittelteils, sowie fünf Rippen und vier Einschnitte zu jeder Seite. Diese Anzahlen können indes auch um eins erhöht oder erniedrigt werden, ohne dass vom konstruktiven Grundgedanken abgewichen wird. Wesentlich dabei ist, dass die Rippen deutlich flächige Elemente sind, und dass sie mit zwei flächigen Stegen in zwei benachbarte Stegbereiche des Mittelteils übergehen. Diese Flächigkeit der Bereiche ist bei hohen Anzahlen an Rippen und Öffnungen nicht mehr gegeben. Bei geringeren Anzahlen hingegen, ist die gewünschte Flexibilität der Rückenschale nicht mehr gegeben. Die einzelnen Rippen werden dann zu eigenständig in ihrer Bewegung unter Last.Preference is given to five openings between six web portions of the middle part, as well as five ribs and four cuts on each side. However, these numbers can also be increased or decreased by one, without deviating from the basic constructive idea. It is essential that the ribs clearly flat elements are, and that they go over with two flat webs in two adjacent land areas of the middle part. This flatness of the areas is no longer given at high numbers of ribs and openings. For smaller numbers, however, the desired flexibility of the back shell is no longer given. The individual ribs then become independent in their movement under load.

Zweckmässigerweise sind Befestigungsstellen zur Befestigung der Schale an einem Trägerteil am Mittelteil ausgebildet. Besonders zweckmässig ist ihre Ausbildung zwei Stegbereichen des Mittelteils, nämlich dem zweitobersten und dem untersten Stegbereich. Eine Befestigung in den Öffnungen ist indes auch denkbar.Conveniently, attachment points for attaching the shell are formed on a support member on the central part. Particularly useful is their training two land areas of the middle part, namely the second top and the bottom land area. An attachment in the openings is also conceivable.

Mit Vorteil legen die einen der Befestigungen die Schale in ihrer Lage zu einem Trägerteil fest, während die anderen eine Beweglichkeit der Schale gegenüber dem Trägerteil zulassen. Bevorzugt wird, wenn die Befestigung in oberen Befestigungsstellen die Schale in ihrer Lage zu einem Trägerteil festlegen. Vorteilhaft ist insbesondere, wenn die Befestigung in unteren Befestigungsstellen der Schale eine Beweglichkeit bezüglich Lage zum Trägerteil erlauben. Dies Beweglichkeit in unteren Befestigungspunkten hat den Vorteil, dass die Bosswölbung stärker beeinflussbar ist, als wenn diese Beweglichkeit in den unteren Befestigungspunkten nicht gegeben wäre. Die Festlegung der Relativlage in den oberen Befestigungspunkten ist auch deshalb zweckmässiger, weil im Brustwirbelsäulenbereich die geringeren Biegungsunterschiede notwendig sind und sich die Rückenschale über die Befestigungspunkte hinaus erstreckt. Der Radius der Wölbung in Längsrichtung der Rückenschale ist damit um die oberen Befestigungspunkte unter Last vergrösserbar.Advantageously put one of the fasteners, the shell in position to a support member, while the other allow mobility of the shell relative to the support member. It is preferred if the attachment in upper attachment points define the shell in its position to a support member. It is particularly advantageous if the attachment in lower attachment points of the shell allow mobility with respect to the position of the support member. This mobility in lower attachment points has the advantage that the Boss buckle is more influenced, as if this mobility would not exist in the lower attachment points. The determination of the relative position in the upper attachment points is also expedient because in the thoracic spine area, the smaller bending differences are necessary and the back shell extends beyond the attachment points. The radius of the curvature in the longitudinal direction of the back shell can thus be increased by the upper attachment points under load.

Zur Komfortsteigerung kann eine Polsterung vorgesehen sein. Diese liegt zweckmässigerweise in horizontalen Streifen vor. Diese Streifen erstrecken sich von Rippe zu Rippe in Querrichtung.To increase comfort, a padding can be provided. This is conveniently in horizontal stripes. These strips extend from rib to rib in the transverse direction.

Die Streifen der Polsterung sind mit Vorteil in Endbereichen an den Rippen befestigt ist und im Bereich über dem Mittelteil lediglich gegen eine vertikale Verschiebung gesichert. Im Mittelteil sollten die Streifen eine kleine Bewegung im Bereich der Öffnungen, also eine Erweiterung oder Verengung der Öffnungsweite zulassen, damit die Beweglichkeit des Rückenteils erhalten bleibt. Dazu haben Verbindungen zwischen den Streifen und dem Mittelteil ein geringes Spiel. Kurzbeschreibung der Figuren:

Fig. 1
zeigt schematisch eine Rückenschale gemäss der Erfindung, bei der die Abstände zwischen den Öffnungen und den Einschnitten positiv sind.
Fig. 2
zeigt schematisch eine Rückenschale gemäss der Erfindung, bei der die Abstände zwischen den Öffnungen und den Einschnitten negativ sind.
Fig. 3
zeigt schematisch eine Rückenschale gemäss der Erfindung, bei der die Öffnungen und Einschnitte kompliziertere Formen aufweisen und die Rippen gespalten sind.
Fig. 4
zeigt schematisch einen vertikalen Schnitt durch eine Rückenschale mit den Befestigungspunkten und einem Trägerteil.
Fig. 5
zeigt eine perspektivische Ansicht einer bevorzugten Rückenschale von der Rückseite her.
Fig. 6
zeigt die bevorzugte Rückenschale von der Seite.
Fig. 7
zeigt die bevorzugte Rückenschale von der Rückseite.
Fig. 8
zeigt die bevorzugte Rückenschale leicht perspektivisch von der Vorderseite her.
Fig. 9
zeigt die bevorzugte Rückenschale mit Polsterung leicht perspektivisch von der Vorderseite her.
The strips of padding are advantageously fixed in end portions of the ribs and secured in the area above the middle part only against a vertical displacement. In the middle part, the strips should allow a small movement in the area of the openings, ie an enlargement or narrowing of the opening width, so that the mobility of the back part is maintained. These connections between the strips and the middle part have a small game. Brief description of the figures:
Fig. 1
schematically shows a back shell according to the invention, in which the distances between the openings and the incisions are positive.
Fig. 2
schematically shows a back shell according to the invention, in which the distances between the openings and the incisions are negative.
Fig. 3
schematically shows a back shell according to the invention, in which the openings and cuts have more complicated shapes and the ribs are split.
Fig. 4
schematically shows a vertical section through a back shell with the attachment points and a support member.
Fig. 5
shows a perspective view of a preferred back shell from the back.
Fig. 6
shows the preferred back shell from the side.
Fig. 7
shows the preferred back shell from the back.
Fig. 8
shows the preferred back shell slightly in perspective from the front.
Fig. 9
shows the preferred back shell with padding slightly in perspective from the front.

Die in Figuren 1 bis 3 dargestellten Rückenschale 11 besitzen eine linke Seite 13 mit Rippen 15 und Einschnitten 17 zwischen den Rippen, ein Mittelteil 19 mit durch Öffnungen 21 zwischen Stegbereichen 23, und eine rechte Seite 25 mit Rippen 15 und Einschnitten 17. Die Öffnungen 21 sind jeweils auf der Höhe der Rippen 15 angeordnet. Die Einschnitte 17 sind jeweils auf der Höhe der Stegbereiche 23 angeordnet. Dies ergibt eine mäandernde Flächenlinie 29 (einseitig als graue Schlangenlinie dargestellt), die jeweils um die Enden der Öffnungen und Einschnitte schlängelt. Diese Flächenlinie 29 ist symmetrisch zu einer in Längsrichtung sich erstreckenden Symmetrieachse der Rückenschale auf beiden Seiten ausgebildet.In the FIGS. 1 to 3 illustrated back shell 11 have a left side 13 with ribs 15 and cuts 17 between the ribs, a central part 19 through openings 21 between web portions 23, and a right side 25 with ribs 15 and cuts 17. The openings 21 are each at the level of Ribs 15 arranged. The cuts 17 are each arranged at the level of the web portions 23. This results in a meandering area line 29 (shown on one side as a gray serpentine line), which meanders around the ends of the openings and notches. This surface line 29 is formed symmetrically to a longitudinally extending axis of symmetry of the back shell on both sides.

In Figur 1 ist eine Version dargestellt, bei der die Enden der Einschnitte 17 und die Enden der länglichen Öffnungen 21 im Mittelteil 19 einen positiven Abstand haben. Dadurch ergibt sich ein in Längsrichtung durchgehender Streifen, der eine Neutralzone zwischen den drei Bereichen "Mittelteil" und "Rippen" bildet. Diese Neutralzone kann in Längsrichtung keine Längenveränderung erfahren, wenn die Rückenschale unter Last gebogen wird. Der für die Kraftübertragung von Stegbereich 23 auf Rippe 15 und von Rippe 15 auf Stegbereich 23 wirksame Querschnitt der Rückenschale, das heisst der Querschnitt der Stege 27 zwischen den Rippen 15 und den Stegbereichen 23 ist breiter als die Breite des die Neutralzone bildenden Streifens. Dadurch ist eine elastische Verbindung von Rippen 15 und Mittelteil 19 gegeben, die sowohl den Mittelteil 19 mit den Rippen 15 koppelt, als auch dem Mittelteil eine Biegbarkeit um Achsen in Querrichtung und den Rippen eine Biegbarkeit um Achsen in Längsrichtung gewährt.In FIG. 1 is a version shown in which the ends of the recesses 17 and the ends of the elongated openings 21 in the middle part 19 have a positive distance. This results in a longitudinally continuous strip which forms a neutral zone between the three areas "middle part" and "ribs". This neutral zone can not undergo longitudinal change in length when the Back shell is bent under load. The effective for the transmission of web portion 23 on rib 15 and rib 15 on web portion 23 effective cross section of the back shell, that is, the cross section of the webs 27 between the ribs 15 and the web portions 23 is wider than the width of the neutral zone forming strip. As a result, an elastic connection of ribs 15 and middle part 19 is provided, which couples both the central part 19 with the ribs 15, as well as the middle part a bendability about axes in the transverse direction and the ribs granted a bendability about axes in the longitudinal direction.

Diese elastische Verbindung kann dadurch beeinflusst werden, dass die Länge der Stege gewählt wird. Mit längeren Stegen wird die Schale beweglicher, mit kürzeren steifer. Längere Stege ergeben sich, wenn die Enden der Öffnungen und die Enden der Einschnitte einander näher kommen oder sogar überschneiden.This elastic connection can be influenced by the fact that the length of the webs is selected. With longer webs, the shell becomes more mobile, with shorter stiffer ones. Longer webs arise when the ends of the openings and the ends of the sipes come closer to each other or even overlap.

In Figur 2 ist eine Variante einer Rückenschale 11 dargestellt, bei der die Einschnitte 17 und die Öffnungen 21 in Querrichtung der Schale 11 einander überlappen. Die Breite der Stege 27 kann auch durch die Teilung (Anzahl Einschnitte und Stegbereiche, bzw. Rippen und Öffnungen), die Breite der Einschnitte und die Breite der Öffnungen beeinflusst werden. Die Schlangenlinie 29, entlang welcher die Kräfte in Längsrichtung übertragen werden, ist länger als in Figur 1. Dadurch ergibt sich eine geringere Verwindung des Querschnittes der Stege 27 pro Längenabschnitt.In FIG. 2 a variant of a back shell 11 is shown, in which the incisions 17 and the openings 21 in the transverse direction of the shell 11 overlap each other. The width of the webs 27 can also be influenced by the pitch (number of cuts and land areas, or ribs and openings), the width of the cuts and the width of the openings. The serpentine line 29, along which the forces are transmitted longitudinally, is longer than in FIG. 1 , This results in a smaller distortion of the cross section of the webs 27 per length.

Die Öffnungen 21 und Einschnitte 17 müssen nicht, wie in Figuren 1 und 2 dargestellt, in gestreckten Linien enden. Sie können durchaus auch unterschiedlich lang sein. Sie können ferner auch verwinkeltere Formen aufweisen. Zur Illustration dieser Gegebenheiten dient die Figur 3. Die Öffnungen 21 haben drei Bereiche: Einen mittleren mit in Längsrichtung grösserer Abmessung, und zwei Seitenbereiche mit in Längsrichtung geringerer Abmessung. Die Einschnitte 17 haben zwei Bereiche, nämlichen einen äusseren mit in Längsrichtung geringerer Abmessung und einen inneren mit in Längsrichtung einer grösseren Abmessung. Durch die Dimensionierung dieser Bereiche kann die Stärke des die Kräfte in Längsrichtung übertragenden Schlangenlinienbereichs beeinflusst werden. In einem Bossbereich sind hier die Ausschnitte entsprechend kleiner gemacht als im Brustbereich. Die Einschnitte und Öffnungen überlappen teilweise, aber nicht überall. Die erste und unterste Öffnung überlappt mit den ersten und untersten Einschnitten gar nicht. Die zweite Öffnung überlappt mit den ersten Einschnitten, aber mit den zweiten noch mehr. Am meisten überlappt die 4. Öffnung mit den angrenzenden Einschnitten. Die 5 und 6. Öffnung überlappen wieder weniger. Auf diese Weise kann die Steifigkeit in verschiedenen Bereichen beeinflusst werden. Die Schlangenlinie 29, entlang welcher die Kräfte in Längsrichtung übertragen werden, hat Bereiche, in denen sie weit ausholt und daher ein weichere Schale bildet, und Bereiche, in denen sie mehr gestreckt ist, und daher eine härtere Schale 11 bildet.The openings 21 and cuts 17 do not have to, as in Figures 1 and 2 shown, end in straight lines. They can also be different in length. They may also have more angular shapes. To illustrate these facts, the FIG. 3 , The openings 21 have three areas: a middle with a longitudinally larger dimension, and two side areas with a longitudinally smaller dimension. The incisions 17 have two areas, namely an outer with a longitudinally smaller dimension and an inner with a longitudinal direction of a larger dimension. The dimensioning of these regions can influence the strength of the serpentine line region which transmits forces in the longitudinal direction. In a boss area, the cutouts are made smaller than in the chest area. The cuts and openings partially overlap, but not everywhere. The first and bottom openings do not overlap with the first and bottom notches. The second opening overlaps with the first cuts, but with the second still more. Most of the 4th opening overlaps with the adjacent cuts. The 5 and 6th openings overlap less again. In this way, the stiffness can be influenced in different areas. The serpentine line 29, along which the forces are transmitted longitudinally, has areas in which it will swing out far and thus form a softer shell, and areas where it is more elongate, and therefore form a harder shell 11.

Die Einschnitte sind im äusseren Bereich schmaler als im inneren Bereich. Lediglich im inneren Bereich beeinflusst die Breite der Einschnitte 17 die Breite der Stege 27. Durch diese Formgebung der Einschnitte kann daher die Beweglichkeit der Schale beeinflusst werden, ohne dass dadurch die Breite der Rippen begrenzt wird. In Figur 2 sind die Rippen 15 gespalten, so dass sie zwei Enden besitzen.The incisions are narrower in the outer area than in the inner area. Only in the inner region, the width of the cuts 17 affects the width of the webs 27. By this shaping of the incisions, therefore, the mobility of the shell can be influenced without thereby limiting the width of the ribs. In FIG. 2 the ribs 15 are split so that they have two ends.

In Figur 3 sind ferner die Befestigungspunkte 31,33 eingezeichnet. Diese liegen auf Stegbereichen 21, und zwar auf dem zweitobersten und dem untersten Stegbereich.In FIG. 3 are also the attachment points 31,33 located. These lie on land areas 21, on the second top and the bottom land area.

In Figur 4 ist die Befestigung der Schale 11 an einem Trägerteil 35 dargestellt. Die Schale 11 ist an den oberen Befestigungspunkten 31 winkelsteif oder drehbar gelagert. In den unteren Befestigungspunkten 33 jedoch ist sie mit einem Hebel 37 am Trägerteil 35 angelenkt. Dieser Hebel 37 erlaubt eine Streckung der Boss- und Brustbereichswölbung der Schale 11. Der Hebel 37 ist zweckmässigerweise federbelastet, um die Schale 11 vor zu spannen.In FIG. 4 the attachment of the shell 11 is shown on a support member 35. The shell 11 is mounted at the upper attachment points 31 angle rigid or rotatable. In the lower attachment points 33, however, it is articulated with a lever 37 on the carrier part 35. This lever 37 allows an extension of the boss and Brustbereichsschwölbung the shell 11. The lever 37 is conveniently spring-loaded to tension the shell 11 in front.

In den Figuren 5 bis 9 ist ein bevorzugtes Ausführungsbeispiel dargestellt. Dieses weist wieder den Mittelteil 19 auf, an den seitlich Rippen 15 anschliessen. Die Einschnitte 17 zwischen den Rippen 15 sind konisch nach innen verengt ausgebildet. Die Öffnungen 21 im Mittelteil 19 reichen bis an die Enden der Einschnitte 27 heran. Es gibt weder eine deutliche Überlappung noch einen deutlichen Abstand. Optisch wirken die Enden auf einer gestreckten Linie.In the FIGS. 5 to 9 a preferred embodiment is shown. This again has the middle part 19, connect to the side ribs 15. The incisions 17 between the ribs 15 are conically tapered inwardly. The openings 21 in the middle part 19 extend to the ends of the incisions 27 zoom. There is neither a clear overlap nor a clear distance. Visually, the ends act on a straight line.

Die Rückschale 11 ist mit Bosswölbung und Brustbereichwölbung ausgebildet und bildet so eine Lordosenstütze. Die Krümmung der Lordosenstütze ist belastungsabhängig, da das Material der Schale elastisch biegsam ist. Der Schlangenlinienbereich (hier nicht eingezeichnet), über den die Kräfte auf die oberen und unteren Befestigungspunkte 31, 33 abgetragen werden, ist dadurch verwindbar. Dies erlaubt der Lordosenstütze, den tatsächlichen Wölbungen eines angelehnten Rückens zu folgen. Durch Druck auf die Bosswölbung wird diese abgeflacht und ein Bereich darüber aufgewölbt. Durch Druck auf diesen geschieht das umgekehrte.The rear shell 11 is formed with Boss vaulting and Brustbereichswölbung and thus forms a lumbar support. The curvature of the lumbar support is load-dependent, since the material of the shell is elastically flexible. The serpentine area (not shown here), over which the forces on the upper and lower attachment points 31, 33 are removed, is thereby verwindbar. This allows the lumbar support, the actual buckling of a to follow a lean back. By pressure on the Bossvölbung this is flattened and an area arched over it. By pressing on this happens the reverse.

In den oberen Befestigungspunkten 31 ist die Schale über Gummipuffer (nicht dargestellt) an dem Trägerteil 35 befestigt. Diese verleihen der Rückenschale eine gewisse Beweglichkeit auch gegenüber diesem Trägerteil 35. Die Rückenschale 11 kann insgesamt verwunden werden, wenn beispielsweise eine Schulter einseitig gegen die obersten Rippen drückt.In the upper attachment points 31, the shell via rubber buffer (not shown) is attached to the support member 35. These give the back shell a certain mobility even with respect to this support member 35. The back shell 11 can be wound in total, for example, if a shoulder presses on one side against the uppermost ribs.

In den unteren Befestigungspunkten sind einer solchen Verwindung enge Grenzen gesetzt, dafür lässt diese untere Befestigung zum, dass sich die Befestigungspunkte 33 in Längsrichtung verschieben und die Schale 11 in diesen Befestigungspunkten 33 verschwenkt werden kann. Dies ermöglicht die Wölbungsänderungen des Boss unter Last.In the lower attachment points of such a distortion narrow limits, but this lower attachment allows that the attachment points 33 move in the longitudinal direction and the shell 11 can be pivoted in these attachment points 33. This allows the vault changes of the boss under load.

Die Rippen sind, wie aus Figuren 6 und 8 ersichtlich, unterschiedlich stark nach vorne gebogen. Sie fassen den Rücken im Bossbereich mehr als im Schulterbereich.The ribs are how out FIGS. 6 and 8th visible, different degrees bent forward. They grasp the back in the boss area more than in the shoulder area.

In Figuren 8 und 9 ist die Rückenschale einmal ohne Polsterung (Figur 8) und einmal mit Polsterung 39 (Fig. 9) dargestellt. Die Polsterung 39 besteht aus Streifen, die quer über die Schale gelegt sind. Sie reichen vom linken zum rechten Rand der Schale und bis in die Enden der Rippen. Dabei überdecken sie die Öffnungen. Diese Öffnungen sind dann nur auf der Rückseite der Schale sichtbar. Die Polsterstreifen sind einzeln an der Schale befestigt. Die beiden untersten Polsterstreifen sind zusammengefasst, um einem Hosenbund und einem Gürtel keine Möglichkeit zum Einhängen im zweituntersten Polsterstreifen zu geben. Die Polsterstreifen sind an ihren Enden mit den Rippen fest verbunden. Im Mittelbereich sind sie so an die Stegbereiche angebunden, dass eine Bewegung der Polsterstreifen in Längsrichtung unterbunden, aber eine geringe Beweglichkeit zwischen den Stegbereichen und dem Polsterstreifen gegeben ist.In FIGS. 8 and 9 is the back shell once without padding ( FIG. 8 ) and once with padding 39 ( Fig. 9 ). The padding 39 consists of strips which are laid across the shell. They extend from the left to the right edge of the shell and into the ends of the ribs. They cover the openings. These openings are then visible only on the back of the shell. The cushion strips are individually attached to the shell. The two bottom upholstery strips are combined to give a waistband and a belt no possibility for hanging in the second lowermost cushion strip. The cushion strips are firmly connected at their ends with the ribs. In the middle area, they are connected to the web areas in such a way that movement of the padding strips in the longitudinal direction is prevented, but there is little mobility between the web areas and the padding strip.

Claims (10)

Elastisch verformbare Rückenschale (11), die zwischen oberen und unteren Befestigungspunkten aufgespannt ist, welche einen Mittelteil (19), der einen Rücken in Längsrichtung stützt, und Rippen (15) umfasst, die in Querrichtung seitlich vom Mittelteil (19) abstehen, welche Rippen (15) durch seitliche Einschnitte (17) von einander getrennt, nach vorne gebogen und gegeneinander beweglich ausgebildet sind, dadurch gekennzeichnet, dass im Mittelteil längliche Öffnungen (21) ausgebildet sind, die in Querrichtung verlaufen und an beiden Enden zwischen den Enden von zwei in Längsrichtung benachbarten seitlichen Einschnitten (17) enden.Elastic deformable back shell (11) spanned between upper and lower attachment points, comprising a middle part (19) supporting a back in the longitudinal direction, and ribs (15) extending transversely laterally from the central part (19), which ribs (15) are separated from one another by lateral incisions (17), bent forwards and movable against each other, characterized in that in the central part elongated openings (21) are formed which extend in the transverse direction and at both ends between the ends of two in Longitudinal adjacent side incisions (17) end. Rückenschale gemäss Anspruch 1, dadurch gekennzeichnet, dass die Schale (11) in Querrichtung in neben einander angeordnete Drittel (13,19,25) annähernd gleicher Breite gegliedert ist, von denen das mittlere Drittel durch den Mittelteil (19) und die äusseren Drittel (13,25) durch die Rippen (15) gebildet sind.Back shell according to claim 1, characterized in that the shell (11) is arranged transversely in side by side arranged thirds (13,19,25) of approximately equal width, of which the middle third through the middle part (19) and the outer third ( 13, 25) are formed by the ribs (15). Rückenschale gemäss Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Enden der Einschnitte (17) und die Enden der Öffnungen (21) in zwei Bereichen liegen, die sich parallel zur Längsrichtung erstrecken, und dass das Ende des Einschnittes (17) und das Ende der Öffnung (21) in Querrichtung einen Abstand von einander zwischen 2 cm und -6 cm, vorteilhaft zwischen 0 und -1 cm haben.Back shell according to claim 1 or 2, characterized in that the ends of the cuts (17) and the ends of the openings (21) lie in two regions which extend parallel to the longitudinal direction, and in that the end of the cut (17) and the end the opening (21) in the transverse direction at a distance of between 2 cm and -6 cm, preferably between 0 and -1 cm have. Rückenschale nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Schale (11) über die Länge der Öffnungen (21) eine vorderseitig konkave Wölbung von maximal 1 cm aufweist.Back shell according to one of claims 1 to 3, characterized in that the shell (11) over the length of the openings (21) has a front concave curvature of a maximum of 1 cm. Rückenschale nach einem der Ansprüche 1 bis 4, gekennzeichnet durch vier bis sechs Öffnungen (21) zwischen fünf bis sieben Stegbereichen (23) des Mittelteils (19), sowie vier bis sechs Rippen (15) und drei bis fünf Einschnitte (17) zu jeder Seite.Back shell according to one of claims 1 to 4, characterized by four to six openings (21) between five to seven land areas (23) of the central part (19), and four to six ribs (15) and three to five cuts (17) to each Page. Rückenschale nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass Befestigungsstellen (31,33) zur Befestigung der Schale an einem Trägerteil (35) am Mittelteil (19), insbesondere an zwei Stegbereichen (23) des Mittelteils (19), ausgebildet sind.Back shell according to one of claims 1 to 5, characterized in that attachment points (31,33) for attaching the shell to a Support member (35) on the central part (19), in particular on two web portions (23) of the central part (19) are formed. Rückenschale nach Anspruch 6, dadurch gekennzeichnet, dass die Befestigung in oberen Befestigungsstellen (31) die Schale (11) in ihrer Lage zum Trägerteil (35) festlegen.Back shell according to claim 6, characterized in that the fixing in upper fastening points (31) define the shell (11) in its position relative to the support part (35). Rückenschale nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Befestigung in unteren Befestigungsstellen (33) der Schale (11) eine Beweglichkeit bezüglich der Lage in Längsrichtung der Schale (11) zum Trägerteil (35) erlauben.Back shell according to claim 6 or 7, characterized in that the attachment in lower attachment points (33) of the shell (11) allow a mobility with respect to the position in the longitudinal direction of the shell (11) to the support part (35). Rückenschale nach einem der Ansprüche 1 bis 8, gekennzeichnet durch eine Polsterung (39) in horizontalen Streifen.Back shell according to one of claims 1 to 8, characterized by a padding (39) in horizontal strips. Rückenschale nach Anspruch 9, dadurch gekennzeichnet, dass ein Streifen der Polsterung (39) in Endbereichen an den Rippen (15) befestigt ist und im Bereich über dem Mittelteil (19) lediglich gegen eine vertikale Verschiebung gesichert ist.Back shell according to claim 9, characterized in that a strip of the padding (39) is secured in end regions to the ribs (15) and is secured in the area above the central part (19) only against a vertical displacement.
EP09158185A 2008-04-18 2009-04-17 Back rest section for a seat Active EP2110052B1 (en)

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US10813463B2 (en) 2017-12-05 2020-10-27 Steelcase Inc. Compliant backrest
US11291305B2 (en) 2017-12-05 2022-04-05 Steelcase Inc. Compliant backrest
CN114502039A (en) 2019-09-18 2022-05-13 斯迪尔科斯公司 Body support member with lattice construction

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US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
CN108471881A (en) * 2015-10-28 2018-08-31 Iii方案有限责任公司 For chair or the movement backrest of seat
WO2017070802A1 (en) * 2015-10-28 2017-05-04 Iii Solutions Gmbh Moveable backrest for a chair or seat
US11825955B2 (en) 2017-06-09 2023-11-28 Steelcase Inc. Seating arrangement and method of construction
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11602223B2 (en) 2019-02-21 2023-03-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11910934B2 (en) 2019-02-21 2024-02-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11786039B2 (en) 2019-12-13 2023-10-17 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11805913B2 (en) 2019-12-13 2023-11-07 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

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