EP3981293B1 - Kompakter klapprahmen für ein klappmöbel wie z. b. ein bettsofa - Google Patents

Kompakter klapprahmen für ein klappmöbel wie z. b. ein bettsofa Download PDF

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Publication number
EP3981293B1
EP3981293B1 EP21201701.6A EP21201701A EP3981293B1 EP 3981293 B1 EP3981293 B1 EP 3981293B1 EP 21201701 A EP21201701 A EP 21201701A EP 3981293 B1 EP3981293 B1 EP 3981293B1
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EP
European Patent Office
Prior art keywords
coupling
framework
curvature
body support
lever coupling
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EP21201701.6A
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English (en)
French (fr)
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EP3981293A1 (de
EP3981293C0 (de
Inventor
Jean Brossier
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Sedac Mecobel NV/SA
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Sedac Mecobel NV/SA
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Publication of EP3981293C0 publication Critical patent/EP3981293C0/de
Publication of EP3981293B1 publication Critical patent/EP3981293B1/de
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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
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A47C17/16—Seating furniture changeable to beds by tilting or pivoting the back-rest
    • A47C17/17—Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat
    • A47C17/175—Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat with tilting or lifting seat-back-rest pivot
    • A47C17/1756—Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat with tilting or lifting seat-back-rest pivot by pivoted linkages
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C17/00—Sofas; Couches; Beds
    • A47C17/04—Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A47C17/16—Seating furniture changeable to beds by tilting or pivoting the back-rest
    • A47C17/20—Seating furniture changeable to beds by tilting or pivoting the back-rest thereby uncovering one or more auxiliary parts previously hidden

Definitions

  • the invention relates to a folding framework for an item of folding furniture such as a sofa bed, as well as an item of folding furniture comprising this framework.
  • Frameworks for folding furniture, and in particular sofa beds, are known in the art. Such frameworks can be folded and unfolded.
  • WO 2004 086 913 describes such a framework known in the art.
  • the framework according to WO '913 provides two roto-translational couplings, which are connected at a first end to a body support coupling and at a second end are connected to two different base beams.
  • the framework according to WO '913 is disadvantageous in that the second ends of the roto-translational couplings are connected vertically spaced on said two base beams. Such vertical spacing requires a framework that requires a substantial amount of (vertical) space for folding and unfolding. In addition, the inventors note that the shape and placement of the roto-translational couplings does not allow a smooth unfolding of the framework.
  • the present invention has as its object a folding framework which eliminates at least one of the drawbacks associated with the prior art or associated with an alternative embodiment as described, for example, in Example 2.
  • the present invention has a framework as its object that is compact and can be folded and unfolded smoothly.
  • the invention relates to a folding framework for an item of folding furniture such as a sofa bed, according to claim 1.
  • the invention in a second aspect, relates to an item of folding furniture such as a sofa bed, comprising the framework according to the first aspect, according to claim 15.
  • the present invention is advantageous due to its compact size; provided at least in part by the shape and placement of the front and rear lever coupling.
  • the present invention is advantageous in that there are no basally projecting elements present in the framework when folded up.
  • the framework can be placed on a substrate without a substructure.
  • the free basal space formed allows cleaning such as vacuuming under the framework.
  • the present invention is also advantageous due to a smoother unfolding of the framework.
  • the invention relates to a folding framework for an item of folding furniture such as a sofa bed, as well as an item of folding furniture comprising this framework.
  • the invention has been summarised in the section provided for that purpose. In what follows, the invention is described in detail, and preferred embodiments are explained.
  • 'a' and 'the' refer to both the singular and the plural, unless the context presupposes otherwise.
  • 'a segment' means one or more segments.
  • 'Framework' in the context of the present text is to be understood as an assembly of parts that serves as a supporting structure for further elements and/or structures.
  • Such parts can be, for example, couplings, coupling pieces, brackets or frames.
  • Such structures can be a sofa bed.
  • a framework is provided internally to such structures.
  • Such a framework can also be provided externally to said structures.
  • Such a framework can be provided both internally and externally to said structures.
  • 'Coupling' is to be understood in the context of the present text as an element suitable for entering into a coupling or connection with another coupling, bracket and/or frame, etc. This can be done, for instance, by means of a simple opening in which the coupling and one of the aforementioned elements are anchored, for instance by means of a hook, screw or other coupling piece.
  • 'Beam' should be understood in the context of the current text as a substantially beam-shaped framework element.
  • 'Frame' should be understood in the context of the present text as an assembly of parts within the framework.
  • the sub-parts of the assembly are connected in a mutually immovable manner, for example by means of a welded seam.
  • 'Pivotable' or 'hingeable' should be understood in the context of the current text as rotatable about a support point.
  • the support point can be a connection point between two couplings or between a coupling and another framework element.
  • 'Longitudinal' or 'longitudinal axis' should be understood in the context of the present text as a direction that is horizontal when the framework is placed on a horizontal surface. In essence, said direction is the direction in which the framework, i.e. the various mattress frames, is folded and/or unfolded.
  • Quoting numerical intervals by endpoints comprises all integers, fractions and/or real numbers between the endpoints, these endpoints included.
  • the present invention relates to a folding framework suitable for an item of folding furniture such as a sofa bed, the framework comprising:
  • the present invention relates to an item of folding furniture such as a sofa bed comprising the framework according to the first aspect;
  • the head support coupling, the body support coupling as well as the lever couplings can be provided in two, three, four, five, six, seven, eight, nine or tenfold.
  • the head support coupling, the back support coupling and the body support coupling are provided in duplicate.
  • said couplings are provided in duplicate respectively on each (longitudinal) side in a direction perpendicular to the longitudinal direction of a framework.
  • a framework for a sofa bed according to the present invention can be unfolded from a folded state to an unfolded state.
  • a simple embodiment of the framework provides a mattress frame suitable for supporting, mounting and/or fixing a mattress. So that the framework can be folded and unfolded, the mattress frame is divided into several sub-mattress frames, specifically a substantially rectangular head support mattress frame and a substantially rectangular body support mattress frame; which are pivotally connected to each other on a long side.
  • the substantially rectangular body support mattress frame is divided into an upper body support mattress frame and a leg support mattress frame, both substantially rectangular and pivotally connected to each other with a long side thereof.
  • the body support mattress frame is with further preference provided with a seat mounting surface for mounting a seat, and a back support mounting surface for mounting a back support.
  • a seat mounting surface for mounting a seat
  • a back support mounting surface for mounting a back support.
  • Such a configuration is compactly foldable relative to the base beam.
  • the seat and back support mounting surfaces face outward when the framework is folded up.
  • Such a configuration provides a folding sofa bed with a comfortable seating position.
  • this framework is provided with a base beam provided in a longitudinal axis of the framework in unfolded state.
  • the base beam may or may not be provided in a base frame, further comprising for instance one or more transverse beams, couplings, plates, etc., and/or one or more additional cross beams provided in a longitudinal axis of the framework.
  • the base frame may or may not further include a substructure; preferably a plurality of legs, wheels, etc.
  • a simple embodiment provides a head support coupling with a first end connected to the head support mattress frame and with a second end connected to the base beam.
  • a simple embodiment also further provides a body support coupling with a first end connected to the body support mattress frame.
  • the invention is distinguished by the provision of a front lever coupling and rear lever coupling.
  • a first end of the front lever coupling is pivotally connected to a frontal side of the body support coupling.
  • a second end of the front lever coupling is pivotally connected to a front end of the base beam.
  • a first end of the rear lever coupling is pivotally connected to a second end of the body support coupling, preferably to the frontal side of the second end of the body support coupling.
  • a second end of the rear lever coupling is pivotally connected to the base beam.
  • connection point of the second end of the rear lever coupling to the base beam can take various forms. This is mainly determined by the shape and/or design of the rear lever coupling.
  • the rear lever coupling can be foldable, spring-actuated, flexible or fixed.
  • the rear lever coupling is fixed.
  • the second end of the rear lever coupling is preferably hingedly connected to the base beam at a connection point on this base beam, said connection point being provided on a substantially perpendicular axis relative to the base beam and substantially through the centre of gravity of the second end of the body support coupling.
  • Such an embodiment provides the most support, and therefore forms the most stable framework.
  • the front lever coupling is provided with a curvature with respect to a longitudinal axis through the first and second connection point of said coupling.
  • the rear lever coupling is provided with a curvature with respect to a longitudinal axis through the first and second connection point of said coupling.
  • Such curvature of the front and rear lever couplings prevents jamming of these couplings during unfolding.
  • such curved couplings also provide a smoother folding and unfolding of the framework.
  • the curvature of the front lever coupling is curved in a frontal direction of the framework, when the framework is in the unfolded state.
  • the curvature of the rear lever coupling is curved in a frontal direction of the framework, when the framework is in the unfolded state.
  • Such curved coupling provides a smoother folding and unfolding of the framework.
  • an interior angle of the curvature of the front lever coupling is between 100° and 150°, preferably between 105° and 145°, more preferably between 105° and 145°, more preferably between 110° and 140°, more preferably between 115° and 135°, more preferably between 120° and 130°, more preferably between 122° and 138°, more preferably between 124° and 136°, most preferably the interior angle of the curvature of the front lever coupling is substantially equal to 125°.
  • the advantages of such interior angle of the curved front lever coupling are illustrated in the examples.
  • an interior angle of the curvature of the rear lever coupling is between 100° and 150°, preferably between 105° and 145°, more preferably between 105° and 145°, more preferably between 110° and 140°, more preferably between 115° and 135°, more preferably between 120° and 130°, more preferably between 122° and 138°, more preferably between 124° and 136°, most preferably the interior angle of the curvature of the rear lever coupling is substantially equal to 125°.
  • the advantages of such interior angle of the curved rear lever coupling are illustrated in the examples.
  • the curvature of the front lever coupling is provided perpendicular to the longitudinal axis through the first and second connection point of said coupling at a front curvature distance relative to the second end of said coupling.
  • the front curvature distance of the front lever coupling is at least 5% and at most 50% of the length between the first and second ends of the front lever coupling, more preferably at least 10% and at most 45%, more preferably at least 15% and at most 40 %, more preferably at least 20% and at most 38%, more preferably at least 25% and at most 36%, most preferably wherein the front curvature distance of the front lever coupling is substantially equal to 33%.
  • the curvature of the rear lever coupling is provided perpendicular to the longitudinal axis through the first and second connection point of said coupling at a front curvature distance relative to the second end of said coupling.
  • the front curvature distance of the front lever coupling is at least 50% and at most 95% of the length between the first and second ends of the front lever coupling, more preferably at least 55% and at most 85%, more preferably at least 60% and at most 80%, more preferably at least 62% and at most 75%, more preferably at least 64% and at most 70%, most preferably wherein the front curvature distance of the front lever coupling is substantially equal to 66%.
  • the interior angle of curvature of the front and rear lever coupling is substantially equal.
  • a ratio of the curvature distance of a coupling to the length between the first and second connection point of said coupling is substantially equal for the front lever coupling and the rear lever coupling.
  • Such lever couplings are substantially similar in shape but provided mirrored to each other. This allows a more compact and smoother folding of the framework.
  • the head support coupling comprises a first and second sub-head support coupling, which are hingedly connected to each other at a connecting end.
  • the first sub-head support coupling is hingedly connected with a first end to the head support mattress frame
  • the second sub-head support coupling being connected with a second end to the base beam
  • the sub-head support coupling further also being hingedly connected to each other with a connecting end.
  • the framework further comprises a synchronisation coupling having a first end hingedly connected between the first and second ends of the body support coupling and having a second end hingedly connected between the first and second ends of the head support coupling.
  • first end of the synchronising coupling is hingedly connected to the frontal side of said coupling.
  • second end being connected to the second sub-head support coupling; with further preference connected between the connecting end and the second end of the coupling.
  • the present example relates to an embodiment of a framework for a sofa bed according to WO 2004 086 913 .
  • the embodiment is shown in figures 1 and 2 .
  • the framework shown in figures 1 and 2 provides two roto-translational couplings (x, y), which are connected at a first end (x1, y2) with a body support coupling and at a second end (x2, y2) are connected with two base beams.
  • Such positioning of the roto-translational couplings is very disadvantageous since the second ends of said couplings are connected vertically spaced to said base beams.
  • Such vertical spacing results in a framework that requires a substantial amount of (vertical) space to be unfolded and folded.
  • such framework when folded ( Figure 2 ) requires an open basal space under the lower of said two base beams.
  • the framework cannot be placed on a substrate without a substructure.
  • the framework leaves no or at most a very limited free basal space for cleaning such as vacuuming, mopping, etc. of a substrate under the mounted substructure of the framework.
  • the inventors note that the shape of the roto-translational couplings according to the framework of WO '913 does not allow a smooth unfolding. Since the roto-translational couplings are straight, they will frequently jam the pivotal connection points during an unfolding, thereby blocking the folding mechanism. In addition, the inventors note that such stiff unfolding is accompanied by wear of the roto-translational couplings.
  • the present example relates to an alternative embodiment of a framework for a sofa bed.
  • the embodiment is shown in Figures 3 and 4 .
  • the embodiment comprises a head support mattress frame (1) pivotally connected to a body support mattress frame (2).
  • the framework further comprises a head support coupling (3) with a first end pivotally connected to the head support mattress frame, as well as a body support coupling (z) with a first end pivotally connected to the body support mattress frame.
  • the framework also comprises a base beam (5) provided in a longitudinal axis of the framework in unfolded state and connected to a second end of the head support coupling.
  • the framework according to the present embodiment differs from the present invention in that the body support coupling is connected to a base beam only by one pivot or rotation point (z4).
  • z4 pivot or rotation point
  • numerous spring elements and hydraulic couplings must be connected to the head support and body support coupling at an angle to the base beam.
  • Such spring elements and hydraulic couplings are disadvantageous to the present invention as they require substantial vertical spacing of multiple base beams. As a result, no compact framework can be constructed.
  • the spring elements are disadvantageous in that they raise the dorsal end of the framework during unfolding. To prevent this, a counterweight should be provided at the dorsal end of the framework, further increasing the weight as well as the volume of the framework.
  • such framework when folded up ( Figure 4 ) requires an open basal space under the lower base beam. As a result, such framework cannot be placed on a substrate without a substructure.
  • such a framework when mounted with a substructure, leaves no or at most a very limited free basal space between the lower of said two base beams and the substrate on which it is placed. Such free basal space is, for example, useful for cleaning such as mopping or vacuuming said substrate.
  • the present example relates to a preferred embodiment of the framework for a sofa bed according to the invention.
  • the embodiment is shown in Figures 5 to 16 .
  • the present framework shown in Figures 5 to 16 comprises a substantially rectangular head support mattress frame (1) having a mattress mounting surface and a long side, as well as a substantially rectangular body support mattress frame (2) comprising a mattress mounting surface and a long side, which side is pivotally connected to said long side of the head support mattress frame.
  • the frame further comprising a head support coupling (3) having a first end pivotally connected to the head support mattress frame, and a body support coupling (4) with a first end pivotally connected to the body support mattress frame.
  • the framework also comprises a base beam (5) provided in a longitudinal axis of the framework in unfolded state and connected to a second end of the head support coupling.
  • the present framework is characterised by a front (6) and rear lever coupling (7).
  • a first end of this front lever coupling is pivotally connected to a frontal side of the body support coupling, while a second end of the front lever coupling is pivotally connected to a frontal end of the base beam.
  • a first end of the rear lever coupling is pivotally connected to a second end of the body support coupling, while a second end of the rear lever coupling is pivotally connected to the base beam.
  • Figures 5 and 6 show a side view of the framework in a fully unfolded state.
  • the front and rear lever couplings according to the embodiment have a curvature in a frontal direction of the framework when the framework is in the unfolded state, i.e. the direction in which the body support mattress frame is unfolded.
  • the interior angle of both couplings is substantially equal to 125°.
  • the curvatures of the front and rear lever coupling are provided perpendicular to the longitudinal axis between the first and second connection point of said coupling at a front curvature distance relative to the second end of said coupling.
  • the curvature distance is respectively substantially equal to 33% and 66% of the length between the first and second ends of the front and rear lever coupling.
  • the curvature of the front and rear lever couplings is substantially equal to each other.
  • a ratio of the curvature distance of a coupling to the length between the first and second connection point of said coupling is also substantially equal for both the front and rear lever coupling.
  • the two couplings mentioned are similar in shape but mirrored to each other.
  • the inventors note that a curvature provided in the couplings prevents blocking of these couplings during the folding up of the framework. After all, straight couplings, when moved abruptly, can block the present roto-translational mechanism by clamping the pivotally connected end of said couplings. Curved couplings prevent such clamping due to a non-linear force distribution. Further, the inventors also note that the curvature distances as described above aid the longitudinal rotation of the body support coupling; i.e.
  • connection point of the front lever coupling will initially cause a rotation
  • connection point of the rear lever coupling will initially cause a downward translation of the body support coupling - thus resulting in a longitudinal rotation of the body support coupling and thus the folding up of the framework.
  • Figures 7 to 14 show side views of the framework during folding or unfolding.
  • the mirrored curvature of the front and rear lever coupling causes the connection point of the front lever coupling to initially rotate substantially, while the connection point of the rear lever coupling will initially cause substantially downward translation.
  • this function alternates, i.e. the connection point of the front lever coupling will mainly provide a downward translation, while the connection point of the rear lever coupling will mainly provide rotation of the body support coupling.
  • This alternating function ensures that: during the first half of the folding up of the framework ( Figures 7 to 10 ), the body support coupling is mainly raised, i.e.
  • a head support coupling comprising a first (31) and second sub-head support coupling (32), which are hingedly connected to each other at a connecting end, also further improves the smooth folding up of the framework.
  • the second sub-head support coupling will ensure that the freedom of movement of the head support coupling increases, so that it will not get stuck during folding up.
  • the first sub-head support coupling is hingedly connected with a first end to the head support mattress frame, while the second sub-head support coupling is connected with a second end to the base beam.
  • the sub-head support couplings are furthermore also hingedly connected to each other with a connecting end.
  • the second sub-head support coupling is substantially longer than the first sub-head support coupling.
  • the second end of the synchronisation coupling is connected to the second (longer) sub-head support coupling.
  • Such configuration provides improved support of the head support-mattress frame.
  • such configuration also provides for a more compact folding up of the framework, in that the second sub-head support coupling is provided substantially in the same plane as the base beam of the framework.
  • Figures 15 and 16 show a side view of the framework in a fully folded up state.
  • the body support coupling is herein substantially provided in the same plane as the base beam of the framework.
  • the framework does not have any basally projecting elements, so that the framework can also be placed on a substrate without the installation of an additional substructure.
  • Such folding up is possible in that the front lever coupling is connected to a front end of the base beam and the rear lever coupling is connected to the second end of the body support coupling.
  • this front lever coupling can provide the required roto-translational movement associated with the folding up of the framework.
  • the long sides of the curved front and rear lever couplings are provided substantially in the extension of the body support coupling when the framework is in the folded up state. Such configuration increases the compactness of the framework and prevents the basal protrusion of these couplings.
  • the head support mattress frame and the body support mattress frame are provided with a mounting surface for a mattress.
  • the mounting surfaces for the mattress face upwards when the framework is unfolded.
  • the body support mattress frame also comprises an upper body support mattress frame (21) and a leg support mattress frame (22), both substantially rectangular and pivotally connected to each other with one long side.
  • the body support mattress frame is further also provided with a seat mounting surface (23) for mounting a seat, and a back support mounting surface (24) for mounting a back support.
  • a seat mounting surface for mounting a seat
  • a back support mounting surface for mounting a back support.
  • Such a configuration is compactly foldable relative to the base beam.
  • the seat and back support mounting surfaces face outwards when the framework is folded up. Such a configuration provides a folding sofa bed with a comfortable seating position.
  • the framework according to the embodiment is provided with an upper leg support-retaining coupling (9) with a first end connected to the body support coupling and with a second end connected to the leg support mattress frame.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Special Chairs (AREA)

Claims (15)

  1. Klappgestell, geeignet für ein Klappmöbel wie etwa eine Schlafcouch, wobei das Gestell Folgendes umfasst:
    - einen im Wesentlichen rechteckigen Rahmen (1) für eine Kopfstützmatratze, der eine Matratzenmontagefläche und eine lange Seite umfasst,
    - einen im Wesentlichen rechteckigen Rahmen (2) für eine Körperstützmatratze, der eine Matratzenmontagefläche und eine lange Seite umfasst, die drehbar mit der langen Seite des Rahmens (1) für die Kopfstützmatratze verbunden ist,
    - eine Kopfstützenkopplung (3), die ein erstes Ende aufweist, das drehbar mit dem Rahmen (1) für die Kopfstützmatratze verbunden ist,
    - eine Körperstützenkopplung (4), die ein erstes Ende aufweist, das drehbar mit dem Rahmen (2) für die Körperstützmatratze verbunden ist, und
    - einen Basisträger (5), der in einer Längsachse des Gestells bereitgestellt ist, wenn er aufgeklappt und mit einem zweiten Ende der Kopfstützenkopplung (3) verbunden ist,
    dadurch gekennzeichnet, dass das Gestell ferner einer vordere Hebelkopplung (6) und eine hintere Hebelkopplung (7) umfasst,
    wobei ein erstes Ende der vorderen Hebelkopplung (6) drehbar mit einer vorderen Seite der Körperstützenkopplung (4) verbunden ist, ein zweites Ende der vorderen Hebelkopplung (6) drehbar mit einem vorderen Ende des Basisträgers (5) verbunden ist,
    wobei ein erstes Ende der hinteren Hebelkopplung (7) drehbar mit einem zweiten Ende der Körperstützenkopplung (4) verbunden ist, ein zweites Ende der hinteren Hebelkopplung (7) drehbar mit dem Basisträger (5) verbunden ist.
  2. Gestell nach dem vorhergehenden Anspruch 1, wobei das erste Ende der hinteren Hebelkopplung (7) drehbar mit der vorderen Seite des zweiten Endes der Körperstützenkopplung (4) verbunden ist.
  3. Gestell nach einem der vorhergehenden Ansprüche 1 oder 2, wobei die vordere Hebelkopplung (6) mit einer Krümmung in Bezug auf eine Längsachse durch den ersten und den zweiten Verbindungspunkt der Kopplung versehen ist.
  4. Gestell nach dem vorhergehenden Anspruch 3, wobei die Krümmung der vorderen Hebelkopplung (6) in einer vorderen Richtung des Gestells gekrümmt ist, wenn sich das Gestell in dem aufgeklappten Zustand befindet.
  5. Gestell nach einem der vorhergehenden Ansprüche 3 oder 4, wobei ein Innenwinkel der Krümmung der vorderen Hebelkopplung (6) zwischen 100° und 150° liegt, vorzugsweise im Wesentlichen gleich 125° ist.
  6. Gestell nach einem der vorhergehenden Ansprüche 3 bis 5, wobei die Krümmung der vorderen Hebelkopplung (6) senkrecht zu der Längsachse durch den ersten und den zweiten Verbindungspunkt der Kopplung in einer vorderen Krümmungsdistanz relativ zu dem zweiten Ende der Kopplung bereitgestellt ist, wobei die vordere Krümmungsdistanz mindestens 5 % und höchstens 50 % der Länge zwischen dem ersten und dem zweiten Ende der vorderen Hebelkopplung beträgt.
  7. Gestell nach einem der vorhergehenden Ansprüche 1 bis 6, wobei die hintere Hebelkopplung (7) mit einer Krümmung in Bezug auf eine Längsachse durch den ersten und den zweiten Verbindungspunkt der Kopplung versehen ist.
  8. Gestell nach dem vorhergehenden Anspruch 7, wobei die Krümmung der hinteren Hebelkopplung (7) in einer vorderen Richtung des Gestells gekrümmt ist, wenn sich das Gestell in dem aufgeklappten Zustand befindet.
  9. Gestell nach einem der vorhergehenden Ansprüche 7 oder 8, wobei ein Innenwinkel der Krümmung der hinteren Hebelkopplung (7) zwischen 100° und 150° liegt, vorzugsweise im Wesentlichen gleich 125° ist.
  10. Gestell nach einem der vorhergehenden Ansprüche 7 bis 9, wobei die Krümmung der hinteren Hebelkopplung (7) senkrecht zu der Längsachse durch den ersten und den zweiten Verbindungspunkt der Kopplung in einer vorderen Krümmungsdistanz relativ zu dem zweiten Ende der Kopplung bereitgestellt ist, wobei die vordere Krümmungsdistanz mindestens 50 % und höchstens 95 % der Länge zwischen dem ersten und dem zweiten Ende der vorderen Hebelkopplung beträgt.
  11. Gestell nach einem der vorhergehenden Ansprüche 3 bis 6 und einem der vorhergehenden Ansprüche 7 bis 10.
  12. Gestell nach den vorhergehenden Ansprüchen 6 und 10, wobei der Innenwinkel der Krümmung der vorderen (6) und der hinteren Hebelkopplung (7) im Wesentlichen gleich ist, wobei ein Verhältnis der Krümmungsdistanz einer Kopplung zu der Länge zwischen dem ersten und dem zweiten Verbindungspunkt der Kopplung für die vordere und die hintere Hebelkopplung im Wesentlichen gleich ist.
  13. Gestell nach einem der vorhergehenden Ansprüche 1 bis 12, wobei die Kopfstützenkopplung (3) eine erste (31) und eine zweite Teilkopfstützkopplung (32) umfasst, die an einem Verbindungsende gelenkig miteinander verbunden sind.
  14. Gestell nach einem der vorhergehenden Ansprüche 1 bis 13, ferner eine Synchronisationskopplung (8) umfassend, die ein erstes Ende aufweist, das zwischen dem ersten und dem zweiten Ende der Körperstützenkopplung (4) gelenkig verbunden ist, und ein zweites Ende, das zwischen dem ersten und dem zweiten Ende der Kopfstützenkopplung (3) gelenkig verbinden ist, wobei das erste Ende der Synchronisationskopplung vorzugsweise gelenkig mit der vorderen Seite der Kopplung verbunden ist.
  15. Klappmöbel wie etwa eine Schlafcouch, das Gestell nach einem der Ansprüche 1 oder 14 umfassend, wobei das Klappmöbel vorzugsweise eine Schlafcouch ist, wobei die Schlafcouch des Weiteren vorzugsweise einen Sitz, eine Rückenlehne und eine Matratze umfasst.
EP21201701.6A 2020-10-09 2021-10-08 Kompakter klapprahmen für ein klappmöbel wie z. b. ein bettsofa Active EP3981293B1 (de)

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US4068328A (en) * 1976-09-27 1978-01-17 Gerth William V Convertible furniture
ITBA20030019A1 (it) * 2003-04-04 2004-10-05 Gruppo Ind Styling Srl Divano letto e meccanismo per la sua apertura e chiusura.
CN208709075U (zh) * 2018-01-23 2019-04-09 西达克沙发床配件（上海）有限公司 一种改良型折叠沙发床

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