EP0868870A2 - Mechanismus für Sofabetten und dergleichen - Google Patents

Mechanismus für Sofabetten und dergleichen Download PDF

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Publication number
EP0868870A2
EP0868870A2 EP98830150A EP98830150A EP0868870A2 EP 0868870 A2 EP0868870 A2 EP 0868870A2 EP 98830150 A EP98830150 A EP 98830150A EP 98830150 A EP98830150 A EP 98830150A EP 0868870 A2 EP0868870 A2 EP 0868870A2
Authority
EP
European Patent Office
Prior art keywords
bedspring
pivoted
mechanism according
lever
section
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.)
Granted
Application number
EP98830150A
Other languages
English (en)
French (fr)
Other versions
EP0868870A3 (de
EP0868870B1 (de
Inventor
Renato Zorzetto
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.)
Stema Srl
Original Assignee
Stema 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
Application filed by Stema Srl filed Critical Stema Srl
Publication of EP0868870A2 publication Critical patent/EP0868870A2/de
Publication of EP0868870A3 publication Critical patent/EP0868870A3/de
Application granted granted Critical
Publication of EP0868870B1 publication Critical patent/EP0868870B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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 present invention relates to a mechanism for sofa-beds and the like, which is capable of extending and lifting a mattress supporting bedspring divided into several sections hinged to one another.
  • the present invention further relates to a chair-bed and a sofa-bed comprising such a mechanism.
  • a sofa-bed is about 80 cm long and has its seat about 45 cm above the ground, such a mattress must be lower and/or shorter than a standard sized mattress, which is about 190 cm long and about 12 cm high.
  • the object of the present invention is thus to provide a mechanism free from such a drawback, i.e. a mechanism capable of housing a standard or even larger sized mattress under a seat anyway having a small size.
  • a mechanism having its main features specified in claim 1.
  • Another advantage of the mechanism according to the present invention is due to the fact that, when the bedspring is folded, at least one of such control lever systems prevents the expansion forces of the compressed mattress from reopening the bedspring.
  • a further advantage of the mechanism according to the present invention is due to the fact that, when the bedspring is open, both the seat and the back are hidden under a middle section of such a bedspring, resulting in an improvement of the aesthetics ofthe sofa-bed or chair-bed in the open position, i.e. in the night-time position.
  • the mechanism according to the present invention is first described in open position, i.e. in the night-time position. Furthermore, owing to the horizontal symmetry of such a mechanism, the drawing obviously shows only one member of each pair of lever systems symmetrically arranged on either side of the mechanism.
  • the present mechanism comprises, in a known way, a parallelepiped-shaped bottom framework 1, which rests on the ground on four feet 2.
  • the four sides of such a base are preferably closed by padded walls which cover the mechanism according to the present invention, the drawing showing only front wall 3 and rear wall 4, possibly higher than base 1.
  • the two front posts of base 1 are supported by two shafts 5 slanted of about 45°.
  • a pair of downwardly projecting brackets 6 is fastened at about a third of the distance between the rear side and the front side of base 1.
  • the lower end of each bracket 6 has pivoted thereon a lever system A of a known type for lifting the rear end of rear section 7 of the bedspring supporting mattress 8.
  • a lever system A of a known type for lifting the rear end of rear section 7 of the bedspring supporting mattress 8.
  • Such a known lever system comprises a lower lever 9 having an end pivoted on a bracket 6 and the other end hinged to an end of an upper lever 10.
  • the other end of upper lever 10 is provided with an eyelet 11 wherein a pivot 12, integral with rear section 7 of the bedspring, may slide and rotate with a short stroke.
  • Point 9-10 has further pivoted thereon an end of a shaft 13 for the transmission of the motion between one of the two lever systems A for lifting the rear portion of rear section 7 of the bedspring and one of the two lever systems B for lifting its front portion.
  • a transmission shaft when shifted towards the rear and lower portion of the mechanism according to the present invention, causes lever 9 to rotate downwards, resulting in the folding of lever 10 thereon and in the lowering into base 1 of bedspring rear section 7.
  • Both lever systems B comprise two almost parallel lifting levers 14 and 15, which are pivoted on base 1.
  • lever 14 has a short length bent of about 130° and is hinged, in proximity to such an angle, to the center of a supporting shaft 5 of base 1.
  • the lower end of lever 14 is connected, through a tension spring 16, to the lower portion of base 1, while its upper end is hinged to the end of a connection shaft 17.
  • the lower end of lifting lever 15 is instead pivoted on the upper end of supporting shaft 5 of base 1, while its upper end is pivoted between the two ends of connection shaft 17. Therefore, spring 16, by acting on the quadrilateral formed by levers 14, 15 and shafts 5, 17, urges levers 14, 15 to rotate upwards and shaft 17 to shift along an axis substantially parallel to shaft 5, i.e. slanted of 45° towards the front and upper portion of the present mechanism. Such an action is useful for reducing the force which is necessary to lift the bedspring during its opening.
  • Each lever system B further comprises two other connection shafts 18 and 19, pivoted to each other at one end.
  • the loose end of shaft 18 is pivoted between the ends of lifting lever 15, while lever 14 and shaft 17 are pivoted between the ends of shaft 19, both in point 14-17.
  • the distance between point 18-19 and point 14-17-19 is about a third of the length of shaft 19.
  • the end of transmission shaft 13, opposite to point 9-10-13, is instead pivoted at about two thirds of the length of shaft 19 from point 18-19. Thanks to shaft 13 and to the quadrilateral formed by levers 14, 15 and shafts 18,19, it is possible to control the motion of lever systems A depending upon the motion of the respective lever systems B, and vice-versa.
  • Point 20-21 ofthe first connecting section 21 has hinged thereto a bedspring intermediate section 22, which is approximately as long as rear section 7, while connecting section 21 is approximately as long as a third of rear section 7.
  • the relative rotation of sections 21 and 22 is also controlled by lever systems B.
  • each side of intermediate section 22 has welded thereon a bracket 23 (shown in Figure 3) which protrudes towards section 21.
  • the outer end of such a bracket has suitably pivoted thereon the end of connection shaft 17, opposite to point 14-17-19. Thanks to this connection, lever systems B, during the extension of connecting section 21, automatically extend also section 22, and vice-versa.
  • Figure 1 shows bedspring sections 7, 21 and 22 in the extended position, i.e. mutually aligned.
  • each lever system B is provided with a tension spring 24 having an end fastened to the upper portion of base 1 and the other end connected, through a bracket 25, to the corner of a lever 26, bent of 100°-110° at about a third of its length.
  • An end of such a lever is pivoted on point 17-23, having as well pivoted thereon connection shaft 17 and bracket 23 integral with intermediate section 22.
  • the other end of lever 26 is pivoted on a side of rear section 7 near point 7-21, where this section is hinged to connecting section 21.
  • spring 24 urges lever 26 to rotate around fulcrum 7-26, so as to rotate also sections 21 and 22 around point 7-21.
  • lever systems B and accordingly of lever systems A, is controlled by a pair of control levers 27, preferably bent of 25°-35° in several points, so that the overall inclination between their end lengths is 100°-110°.
  • control levers are mutually connected through a transversal bar (not shown in the drawing) welded thereon in proximity to one of their ends 28, capable of resting on the ground.
  • the other end of levers 27 is instead pivoted approximately at the center of the sides of first connecting section 21 of the bedspring.
  • a short longitudinal eyelet 28 is provided, wherein a pivot 30 may slide and rotate, fastened to the end of a lever 31 belonging to one of two lever systems C.
  • both lever systems C comprise an angular support 33, fastened to one of the sides of back 32 and to a shaft being part of a pantograph, formed, besides shaft 34, also by lever 31, three other shafts 35, 36, 37 and another lever 38.
  • this pantograph is also extended, so that back 32 lies in an almost horizontal position under intermediate section 22 of the bedspring.
  • seat 39 of the sofa-bed or chair-bed which is fastened to section 22 so as to lie above or under such section 22 whether the bedspring is extended or folded, respectively, is arranged between section 22 and back 32.
  • Point 31-38 having pivoted thereon an end of the aforementioned pantograph being part of lever system C, has also pivoted thereon an end of a transmission lever 40 which belongs to one of two lever systems D, acting so as to extend the last two sections 41 and 42 of the bedspring.
  • a transmission lever 40 which belongs to one of two lever systems D, acting so as to extend the last two sections 41 and 42 of the bedspring.
  • Such an extension is performed by acting onto a pair of legs 43, having one end pivoted on one side of front section 42 of the bedspring and the other end 44 capable of resting on the ground.
  • a connection lever 45 bent of about 100°-110°, is pivoted near point 42-43.
  • Lever 45 is pivoted at this corner on the second connecting section 41 of the bedspring, while the free end of the same lever is pivoted on the free end of transmission lever 40. It is thus evident that, by rotating legs 43 downwards, bedspring sections 22, 41 and 42 are extended, and vice-versa.
  • the bedspring of the mechanism according to the present invention is folded under seat 39 in the day-time position.
  • Front section 42 of such a bedspring is arranged horizontally between intermediate section 22, placed above it, and rear section 7, placed under it, while connecting sections 21 and 41 are arranged vertically.
  • Figure 2 does not show mattress 8, which is compressed between the folded sections of the bedspring.
  • the expansion force exerted by compressed mattress 8 against the bedspring sections does not result in the opening of the bedspring, since the control lever systems C, blocked in a position opposing such a force, prevent lifting levers A and B from moving, so as to block the whole mechanism according to the present invention.
  • Lever systems C are released by moving back 32 forward, so that levers 31 pass the dead-point represented by their substantial alignment with bedspring intermediate section 22. Once this dead-point is passed, lever systems C are free to move and no longer oppose the opening motion of the mechanism according to the present invention. Furthermore, such an opening is made easier by the action of springs 16 and 24, which, by acting on lever systems B, urge bedspring sections 7, 21 and 22 to extend.
  • section 21 and 22 is transmitted through shafts 17 and 20 to lever systems B, which lift the front portion of rear section 7 of the bedspring due to the upward rotation of the pairs of levers 14 and 15, pivoted on shafts 17 and connected to shafts 20 through shafts 18 and 19.
  • the forward rotation of shafts 18 further results in the forward shift of shafts 13, so that the motion of lever systems B is transmitted to lever systems A.
  • lever systems B further results in the increasing of the angle formed by sections 7 and 21, which as well gradually increases from 90° to 180°, also thanks to the mechanical connection between rear section 7 and intermediate section 22 provided by lever 26.
  • the bedspring may be obviously sized so as to support two or more mattresses side by side.
  • other embodiments of the mechanism according to the present invention may obviously comprise two or more bedsprings which are extendible independently from one another by means of lever systems of the aforementioned type.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Nursing (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Special Chairs (AREA)
EP19980830150 1997-04-01 1998-03-18 Mechanismus für Sofabetten und dergleichen Expired - Lifetime EP0868870B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000750 IT1290510B1 (it) 1997-04-01 1997-04-01 Meccanismo per divani letto e simili
ITMI970750 1997-04-01

Publications (3)

Publication Number Publication Date
EP0868870A2 true EP0868870A2 (de) 1998-10-07
EP0868870A3 EP0868870A3 (de) 1999-10-20
EP0868870B1 EP0868870B1 (de) 2006-01-11

Family

ID=11376709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980830150 Expired - Lifetime EP0868870B1 (de) 1997-04-01 1998-03-18 Mechanismus für Sofabetten und dergleichen

Country Status (4)

Country Link
EP (1) EP0868870B1 (de)
DE (1) DE69833176T2 (de)
ES (1) ES2255727T3 (de)
IT (1) IT1290510B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1169948A1 (de) * 2000-07-06 2002-01-09 Spiralflex S.N.C. Di Paccagnella E Rinaldo Sofabett
EP1190649A1 (de) * 2000-09-21 2002-03-27 Stema S.r.l. Mechanismus für Sofabetten und dergleichen
WO2004086913A1 (en) * 2003-04-04 2004-10-14 Gruppo Industriale Styling Sofa bed and its open-close mechanism
US8201290B1 (en) * 2006-08-17 2012-06-19 Flair Interiors, Inc. Convertible sofa with contained air mattress
IT202200000266A1 (it) * 2022-01-11 2023-07-11 Nisi Group S R L Divano-letto a rete ribaltabile

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559243A (en) * 1920-04-12 1925-10-27 Seng Co Convertible seat structure
US4800598A (en) * 1987-12-01 1989-01-31 Leggett & Platt, Incorporated Anti-tilt sofa sleeper mechanism
US4918770A (en) * 1988-11-21 1990-04-24 Super Sagless Corp. Sofa bed with closing and opening assist
IT1264589B1 (it) * 1993-06-11 1996-10-04 Lampolet Spa Divano letto a struttura articolata pieghevole

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1169948A1 (de) * 2000-07-06 2002-01-09 Spiralflex S.N.C. Di Paccagnella E Rinaldo Sofabett
EP1190649A1 (de) * 2000-09-21 2002-03-27 Stema S.r.l. Mechanismus für Sofabetten und dergleichen
WO2004086913A1 (en) * 2003-04-04 2004-10-14 Gruppo Industriale Styling Sofa bed and its open-close mechanism
CN100594824C (zh) * 2003-04-04 2010-03-24 斯泰林工业集团有限责任公司 沙发床及其开-合机构
US8201290B1 (en) * 2006-08-17 2012-06-19 Flair Interiors, Inc. Convertible sofa with contained air mattress
IT202200000266A1 (it) * 2022-01-11 2023-07-11 Nisi Group S R L Divano-letto a rete ribaltabile

Also Published As

Publication number Publication date
IT1290510B1 (it) 1998-12-04
DE69833176T2 (de) 2006-08-03
EP0868870A3 (de) 1999-10-20
ES2255727T3 (es) 2006-07-01
EP0868870B1 (de) 2006-01-11
ITMI970750A1 (it) 1998-10-01
DE69833176D1 (de) 2006-04-06

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