EP0807390B1 - Mechanism for a sofa-bed enabling the adjustment in three positions - Google Patents

Mechanism for a sofa-bed enabling the adjustment in three positions Download PDF

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Publication number
EP0807390B1
EP0807390B1 EP97107379A EP97107379A EP0807390B1 EP 0807390 B1 EP0807390 B1 EP 0807390B1 EP 97107379 A EP97107379 A EP 97107379A EP 97107379 A EP97107379 A EP 97107379A EP 0807390 B1 EP0807390 B1 EP 0807390B1
Authority
EP
European Patent Office
Prior art keywords
angle
bar
fact
bars
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97107379A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0807390A2 (en
EP0807390A3 (en
Inventor
Nunzio Spontella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gruppo Industriale Styling Srl
Original Assignee
Gruppo Industriale Styling Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Gruppo Industriale Styling Srl filed Critical Gruppo Industriale Styling Srl
Publication of EP0807390A2 publication Critical patent/EP0807390A2/en
Publication of EP0807390A3 publication Critical patent/EP0807390A3/en
Application granted granted Critical
Publication of EP0807390B1 publication Critical patent/EP0807390B1/en
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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

Definitions

  • the present invention regards a mechanism for sofa-beds enabling the adjustment in three positions, said "bed”, “divan” and “relax", of a sofa-bed.
  • Such mechanisms are generally release mechanisms comprising two reciprocally moving angle-bars, a kinematism, similar to an articulated quadrilater, many intermediate elements forming a seat and a ratchet to lock the sofa-bed in the positions termed "divan” and "relax", and, at least, two toothed profiles that, engaging each other, determine the reciprocal position of the angle-bars and, also, the position of the frames supporting the sofa-bed.
  • the invention is different from the standards on the market thanks to the fact that the angle-bars constitute a release mechanism without the interposition of additional elements; wherein the first angle-bar has a shaped profile and is adapted to engage a pawl at two different points said pawl is positioned upon a back lever of an articulated quadrilateral arrangement and has variable relative motion with respect to said shaped profile; the second angle-bar has a toothed profile enabling a cam, fixed to said first angle-bar, to engage said toothed profile; in this way, the relative position between the two angle-bars is well determined to enable said three adjustment positions to be achieved.
  • the other aim of the invention is a remarkable reduction of the number of the hinges, number that, as it will be seen in the detailed description, is not higher than five.
  • the cam and the toothed profile of the second angle-bar are mutually stressed by means of compression, avoiding therefore any tangential stress for the teeth of the profiles.
  • the present sofa-bed is made of padding elements supported by two frames; said frames are connected so that they can reciprocally move by means of two angle-bars, concurrent in a point; one of said angle-bars 1 supports the frame which makes up the seat of the sofa-bed and the second one 2 supports the frame forming the back of the sofa-bed.
  • the angle-bar 2 is part of an articulated quadrilateral comprising a fixed lever 11 (which has two fixed hinges 11' and 11" at its ends), two movable levers, a front one 5 and a back one 6.
  • An elastic return element 8 connects the fixed lever 11 to the movable back lever 6.
  • the two levers 5 and 6 are connected to the second angle-bar by means of the hinges 12 and 6' respectively.
  • the angle-bars 1 and 2 and the front lever 5, meet at said hinge 12.
  • the angle-bars without interposition of additional elements, form a release mechanism enabling the desired positions; in fact, the first angle-bar 1 has a shaped profile 4, such to engage, at two different points 4' and 4", a pawl 7; said pawl is positioned on the back lever 6 of the articulated quadrilateral, and has variable relative motion with the respect to said shaped profile when in the positions "divan” and "relax"; moreover, the other angle-bar 2 has a toothed profile 3 enabling a cam 9 (fixed to said first angle-bar by means of the hinge 9" and submitted to the action of a return spring 10) to engage said toothed profile; in this way, the relative position among the two angle-bars is well determined to enable said three adjustment positions to be achieved.
  • cam 9 is on the same plane of the angle-bar 2 and, in particular, of its toothed profile 3. According to a preferential realisation, it is also possible to further ensure the complanarity between the cam and the angle-bar by means of a fixing plate 13.
  • the principle of functioning of the mechanism is very simple.
  • the shaped profile 4 of the first angle-bar 1 presents a hollow 4" receiving the pawl 7 in the said position "divan” and a projecting portion 4' able to stop the pawl 7 in the said position "relax".
  • the projecting portion 4' presents a flat surface, without hollow, and, therefore, the said position "relax” is determined by the contact at just one point between said projecting portion 4' and the pawl 7.
  • the positions "divan” and “relax” are obtained when the surface 9' of the cam 9 engages the toothed profile 3 of the second angle-bar 2; this fact, in a univocal way, determines the reciprocal position of the two angle-bars.
  • the way of working of the surface 9' of the cam and of the teeth of the toothed profile 3 is proper because they are both stressed by compression and not tangentially.
  • the mechanism in object is extremely simple, capable of performing, in an effective way, functions which, up to now, were performed only by very complex mechanisms with a large number of components.
  • the invention is remarkably different from the others, known as prior art, because it needs only five hinges, that is: the two fixed hinges 11' and 11" of the articulated quadrilateral, the hinge 6' which connects the back lever 5 of the quadrilateral 6 with the second angle-bar 2, the hinge 12 at which the two angle-bars 1 and 2 and the front lever 5 of the articulated quadrilateral meet and the hinge 9" which connects the first angle-bar 1 with the cam 9.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Special Chairs (AREA)
  • Mobile Radio Communication Systems (AREA)
EP97107379A 1996-05-13 1997-05-05 Mechanism for a sofa-bed enabling the adjustment in three positions Expired - Lifetime EP0807390B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96BA000025A IT1287018B1 (it) 1996-05-13 1996-05-13 Meccanismo per divani-letto che permette la regolazione in tre posizioni
ITBA960025 1996-05-13

Publications (3)

Publication Number Publication Date
EP0807390A2 EP0807390A2 (en) 1997-11-19
EP0807390A3 EP0807390A3 (en) 1999-06-09
EP0807390B1 true EP0807390B1 (en) 2000-11-02

Family

ID=11335721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97107379A Expired - Lifetime EP0807390B1 (en) 1996-05-13 1997-05-05 Mechanism for a sofa-bed enabling the adjustment in three positions

Country Status (6)

Country Link
EP (1) EP0807390B1 (da)
AT (1) ATE197232T1 (da)
DE (1) DE69703409T2 (da)
DK (1) DK0807390T3 (da)
ES (1) ES2152591T3 (da)
IT (1) IT1287018B1 (da)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBA20010006A1 (it) 2001-01-16 2002-07-16 Gruppo Ind Styling Srl Meccanismo innovativo per divani - letto.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8230287U1 (de) * 1982-10-28 1983-04-14 Stanzwerk Peitz & Co, 5802 Wetter Beschlag an einer einen sitz- und einen rueckenpolsterrahmen aufweisenden bettcouch
BE900723A (fr) * 1984-10-01 1985-02-01 Vangeenberghe Jacques Mecanisme d'articulation pour un lit-divan.
DE8605100U1 (de) * 1986-02-26 1986-05-07 Fa. Oskar Liebermann, 8625 Sonnefeld Gestell für kombinierte Sitz-Liege-Möbel
BE1002798A4 (nl) * 1989-01-26 1991-06-11 Sedac Mecobel Mechanisme voor het in drie posities, nl. ''bed'', ''divan'' en ''relax'' instellen van een divan-bed''.

Also Published As

Publication number Publication date
ITBA960025A1 (it) 1997-11-13
EP0807390A2 (en) 1997-11-19
DE69703409D1 (de) 2000-12-07
ES2152591T3 (es) 2001-02-01
DK0807390T3 (da) 2001-02-26
EP0807390A3 (en) 1999-06-09
IT1287018B1 (it) 1998-07-24
DE69703409T2 (de) 2001-06-21
ATE197232T1 (de) 2000-11-15

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