EP0452386B1 - Stützelement mit steuerbarer steifheit - Google Patents

Stützelement mit steuerbarer steifheit Download PDF

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Publication number
EP0452386B1
EP0452386B1 EP90901651A EP90901651A EP0452386B1 EP 0452386 B1 EP0452386 B1 EP 0452386B1 EP 90901651 A EP90901651 A EP 90901651A EP 90901651 A EP90901651 A EP 90901651A EP 0452386 B1 EP0452386 B1 EP 0452386B1
Authority
EP
European Patent Office
Prior art keywords
supporting element
element according
compressible
grids
strata
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
EP90901651A
Other languages
English (en)
French (fr)
Other versions
EP0452386A1 (de
Inventor
Gérard Block
Jean Loeb
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.)
Compagnie Europeenne de Sieges pour Automobiles CESA
Original Assignee
Compagnie Europeenne de Sieges pour Automobiles CESA
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 Compagnie Europeenne de Sieges pour Automobiles CESA filed Critical Compagnie Europeenne de Sieges pour Automobiles CESA
Publication of EP0452386A1 publication Critical patent/EP0452386A1/de
Application granted granted Critical
Publication of EP0452386B1 publication Critical patent/EP0452386B1/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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S297/00—Chairs and seats
    • Y10S297/03—Pneumatic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S5/00—Beds
    • Y10S5/91—Beds with suction means

Definitions

  • the invention relates to support elements with controlled rigidity comprising an envelope subjected to a control pressure.
  • the invention applies by way of nonlimiting examples to pieces of furniture such as seats, benches or sofas.
  • the invention relates more particularly to a support element adaptable to the morphology of any user in order to obtain support and support in an anatomically correct position which does not cause any fatigue phenomena or produce deformation of the spine likely to cause lordosis or kyphosis.
  • the publication FR-A 2 096 133 describes a seat whose backrest is equipped with a cushion containing a porous compressible mass which is elastically placed in communication with a source of vacuum. This source adjusts the thickness of the cushion until its rigidity is sufficient to resist compression due to the load communicated by the seat user. It is noted, however, that such a design of the backrest is unsuitable for the needs of lateral support of the trunk and sacro-lumbar lordosis during posture changes of the seat user.
  • EP-A 0 113 613 describes a seat including a partitioned PVC envelope containing a layer of particles such as polystyrene beads.
  • This envelope is joined by means of piping to a vacuum pump. When suction is established, the walls of the envelope compress the polystyrene beads without appreciable variation in volume, creating a consistency between the beads which hardens the layer in the position required by the seat position of the seat user.
  • Publication EP-A-267 640 describes an envelope for surgical use which can keep a shape by the effect of the vacuum and in which beads are held in place by gluing on layers of nonwoven fabric or in a network of plastic produced by injection.
  • the subject of the invention is a support element with controlled rigidity comprising an outer casing and an improved inner load with the aim of avoiding the drawbacks observed with ball loads.
  • the load is constituted by a flexible laminated structure, the different layers of which are mounted with relative displacement under the effect of a non-uniform distribution of the compressive force of the load in the absence of any pressure d 'servo and whose envelope is subjected to a pressure variation to remove any relative movement between the different strata by giving them the necessary rigidity.
  • the support element thus produced fulfills the stiffening function and finds its place, for example in the preparation of trim fittings in combination with adjustment devices with inflatable air pockets.
  • It may, in particular, include a substantially reduced constant thickness whatever the position of use and be easily obtained by automated cutting processes.
  • FIG. 1 represents a back support area 3 arranged on the frame of the backrest 1 of a motor vehicle seat covered with padding 2.
  • the back support zone 3 is extended to the right and to the left by two lateral support zones 4, 5.
  • An adjustment system 10 actuated by means of operating devices such as a manipulator assembly 11 rests, d on the one hand on the rigid frame 12 which defines the load surface of the backrest, and which is fixed as is known between the lateral uprights 13 of the backrest frame, and on the other hand on supports 14, 15 for additional padding cushions respectively carried by the lateral uprights 13.
  • the adjustment system 10 is covered by a lining of fibers 28 agglomerated by an appropriate binder, in order to give the seat the desired permeability and ventilation and to ensure a better distribution of the pressures of the trunk on the file.
  • the trimming system 10 and the fiber lining are covered by the padding 2 and thus constitute all of the dorsal 3 and lateral supports 4, 5.
  • the adjustment system here consists of two superimposed support elements 16, 17, the size of which can be modified by varying their internal pressure.
  • each of the elements 16, 17 is constituted by a hollow member whose walls are impermeable to gas.
  • the unit 16 which rests on the frame 12 has a predetermined shape by the assembly of three compartmentalized airbags 18, 19, 20 whose general configuration is in correspondence with the different support zones 3, 4, 5 and which are integral with each other so as to define three inflatable capacities separately or simultaneously under the action of the inflation pulses communicated by the manipulator assembly.
  • the element 17 as shown in FIG. 2 consists of an outer casing 29 connected via the manipulator to a vacuum source forming part of a pneumatic servo-control device, an exemplary embodiment of which has been described by publication EP-A 0 113 613.
  • a load 30 constituted by a set of flexible and flexible sheets 31 constituting a deformable layer under the effect of a non-uniform distribution of the compressive force.
  • the material of the sheets can be paper, textile, plastic or metal capable of relative displacement under the effect of a deformation whose physical characteristics (texture - thickness - friction coefficients) are adapted to the qualities of rigidity required for the element 17 when the casing 29 communicates with the vacuum source.
  • the rigidity is obtained by blocking the sheets under pressure by friction forces or following an embedding or locking effect.
  • the sheets 31 can have different characteristics and have a surface with buttons or pins that can be engaged in depressions or meshes of a grid.
  • the sheets can also have perforations, be cut out or have stiffening elements (plates, rings, etc.) in order to facilitate the depression of the envelope, increase the rigidity of the load, improve cohesion between the leaves or avoid the formation of folds.
  • the element of FIG. 3 thus comprises a load 30 constituted by at least one layer produced in a plate 32 of compressible foam rubber disposed between two grids 33 in order to obtain penetration of the plate 32 in the meshes of the grid when the casing 29 is connected to the vacuum source.
  • the thickness of the plate 32 is determined according to the desired rigidity.
  • FIGS. 4 and 5 describes a load similar to that of FIG. 3 in which the middle stratum is constituted by a grid such as 33 disposed between two plates 32a, 32b, themselves in contact with two grids 34.
  • Each of the grids 34 carries pins 35 positioned perpendicular to the plates 32a, 32b and oriented through said plates towards the central grid 33.
  • the pins 35 of the grids 34 fit into the meshes of the grid 33 and improve the aforementioned mechanical connection by connecting the two grids 34 by a locking effect.
  • the plates 32a, 32b whose thickness is slightly greater than the useful length of the pins 35, are compressed and the pins 35 become embedded in the grid 33.
  • the plates 32a, 32b return to their initial state and the pins 35 automatically detach from the grid 33 by an unlocking effect.
  • the pins 35 fit into other meshes of the grid 33. The reversibility of the locking and unlocking allows the shape of the support element to be modified at will.
  • the middle layer is formed by two sets of pins 35 mounted in opposition and integral with two grids 34. It will, however, be possible to use in certain configurations of the element that a single grid such as 34 with which the pins 35 are secured and oriented in two opposite directions normal to said grid towards external grids 33 by crossing respectively two compressible plates 32a, 32b.
  • the aforementioned assembly is protected by external layers 37 in order to preserve the envelope 29 from any perforations.
  • the pins 35 are replaced by bars 38 for connecting the external grids 33 through the compressible central plate 32.
  • the bars 38 may have a cylindrical body of larger diameter suitable for maintaining a substantially constant spacing between the grids 33 as indicated in FIG. 7b, while pins 38a located at the end of said bars are engaged in the grid meshes 33.
  • the bars 38 have a median bulge 38b and extend through a set of two compressible plates 32a, 32b.
  • the bars 38 are integral with a stratum or central grid 34. These devices are intended to obtain the correct centering of the bars in the laminate layer.
  • the sealed envelope 29 constituting the middle layer is inside the support element.
  • the outer walls of the envelope 29 carry pins 35 integral with grids 34 and extend through compressible plates 32a, 32b.
  • the envelope 29 contains a flexible compressible body 39 such as a cellular foam.
  • the envelope 29 is connected to a source of vacuum or pressure in order to obtain a displacement of the pins perpendicular to the external walls of the envelope in the direction of two external grids 33.
  • the outer layers respectively constituted by a protective wall 37, by a covering cover 40 and by the outer grids 33 remain at atmospheric pressure.
  • the grids 33, the walls 37 and the cover 40 are held in position by a spacer 50 in order to maintain the spacing of the grids 33 while allowing overall flexibility of the support element when the pins 35 are not positively engaged in the meshes of the grids 33.
  • the operating mode of the support element depends on the initial spacing of the grids 34, 33 and on the length of the pins 35.
  • the reestablishment of atmospheric pressure allows the envelope 29 to return to its normal size and the engagement of the pins 35 in other meshes of the grids 33 in order to stiffen the support element in its new shape.
  • the shape of the latter is maintained at atmospheric pressure and the vacuum source is only switched on for the time necessary for the shape modifications.
  • the support element finds just as well an application in the manufacture of mattresses, gutters and splints usable in the medical field as in the manufacture of molds or industrial packaging.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Press Drives And Press Lines (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Details Of Garments (AREA)
  • Buffer Packaging (AREA)
  • Prostheses (AREA)
  • Seats For Vehicles (AREA)
  • Laminated Bodies (AREA)
  • Machine Tool Units (AREA)

Claims (9)

  1. Stützelement mit steuerbarer Steifigkeit, insbesondere für einen Sitz, aufgebaut aus einer dichten Umhüllung (29) und einer Füllung (30), die aus einer geschichteten flexiblen Struktur aufgebaut ist, deren verschiedene Schichten (31, 32, 33, 32a, 32b, 34) zur relativen Verlagerung unter der Wirkung einer nicht gleichförmigen Verteilung der Druckkraft der Füllung bei Fehlen jeglichen Regelungsdruckes angebracht sind und wobei man die Umhüllung (29) einer Druckänderung unterwirft, um jegliche relative Verlagerung zwischen den Schichten zu unterdrücken, indem man ihnen die nötige Steifigkeit verleiht, dadurch gekennzeichnet, daß die schichten (33, 34) mechanische Immobilisierungsmittel besitzen, die auf beiden Seiten wenigstens einer kompressiblen Schicht (32, 32a, 32b) verteilt sind.
  2. Stützelement nach Anspruch 1, dadurch gekennzeichnet, daß die mechanischen Mittel zum Einbau sind.
  3. Stützelement nach Anspruch 2, dadurch gekennzeichnet, daß es die mechanischen Immobilisierungsmittel (35, 38) erlauben, die benachbarten Schichten (33, 34) durch die kompressiblen Schichten (32, 32a, 32b) hindurch zu verriegeln.
  4. Stützelement nach Anspruch 3, dadurch gekennzeichnet, daß die mittlere Schicht durch ein Gitter (33) gebildet ist, dessen Maschen die Aufnahmeelemente für Stifte (35) bilden, die auf einer benachbarten Schicht (34) angeordnet sind und sich durch die kompressible Schicht (32) erstrecken.
  5. Stützelement nach Anspruch 3, dadurch gekennzeichnet, daß die mittlere Schicht durch eine Gesamtheit von Stiften (35) gebildet ist, die gegenüberliegend in Richtung auf zwei benachbarte Gitter (33) gerichtet sind, durch die kompressiblen Schichten (32a, 32b) hindurch.
  6. Stützelement nach Anspruch 3, dadurch gekennzeichnet, daß die Einbauelemente durch Verbindungsglieder (38) von Gittern (33) gebildet sind, die wenigstens einer kompressiblen Schicht (32, 32d, 32b) benachbart sind.
  7. Stützelement nach Anspruch 6, dadurch gekennzeichnet, daß die verbindungsglieder (38) Distanzmittel für die Gitter (33) aufweisen und sich durch die kompressible Schicht (32, 32a, 32b) hindurch erstrecken.
  8. Stützelement nach einem der Ansprüche 1, 2, 3, 5, 6, 7, dadurch gekennzeichnet, daß die dichte Umhüllung (29) sich zwischen den gegenüberliegenden Stiften (35) erstreckt, die auf benachbarte Gitter (33) gerichtet sind, zwischen denen eine Distanzvorrichtung (50) angeordnet ist.
  9. Stützelement nach Anspruch 8, dadurch gekennzeichnet, daß die Umhüllung (29) einen kompressiblen Körper (39) enthält, dessen Ausdehnen und Zusammenziehen unter der Wirkung einer Änderung des Druckes in der Umhüllung (29) die Verlagerung der Stifte (35) in dem Sinne einer Verriegelung oder einer Entriegelung im Kontakt mit den benachbarten Gittern (33) steuert.
EP90901651A 1989-01-10 1990-01-02 Stützelement mit steuerbarer steifheit Expired - Lifetime EP0452386B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900197 1989-01-10
FR8900197A FR2641493B1 (fr) 1989-01-10 1989-01-10 Element de soutien a rigidite asservie

Publications (2)

Publication Number Publication Date
EP0452386A1 EP0452386A1 (de) 1991-10-23
EP0452386B1 true EP0452386B1 (de) 1993-12-29

Family

ID=9377563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90901651A Expired - Lifetime EP0452386B1 (de) 1989-01-10 1990-01-02 Stützelement mit steuerbarer steifheit

Country Status (9)

Country Link
US (1) US5159726A (de)
EP (1) EP0452386B1 (de)
JP (1) JP2656151B2 (de)
AT (1) ATE99138T1 (de)
DE (1) DE69005616T2 (de)
DK (1) DK0452386T3 (de)
ES (1) ES2047911T3 (de)
FR (1) FR2641493B1 (de)
WO (1) WO1990007890A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5556169A (en) * 1994-07-15 1996-09-17 Parrish; Milton E. Multi-layer conformable support system
US6092249A (en) * 1996-05-28 2000-07-25 Deka Products Limited Partnership Constant pressure seating system
US6713001B1 (en) 1997-12-29 2004-03-30 Lear Corporation Surface imaging method for a vehicle seat
WO1999042070A1 (en) 1998-02-20 1999-08-26 Sand Therapeutic, Inc. Therapeutic support for the reduction of decubitus ulcers
JP4426722B2 (ja) 1998-05-19 2010-03-03 ケルシウス，エルエルシー フレーム部材と取外し可能に取付けられた膜とを備えたタオルマット
USD447661S1 (en) 1998-05-19 2001-09-11 Gray Matter Holdings, Llc Mat with inflatable pillow
US6922863B2 (en) * 2001-03-07 2005-08-02 Gualtiero G. Giori Adjustable foam mattress
US6684433B2 (en) * 2001-03-07 2004-02-03 Gualtiero G. Giori Pressure adjustable foam support apparatus
DE10156621C1 (de) * 2001-11-17 2002-11-21 Thomas Hausmann Kindersitz, insbesondere für ein Kraftfahrzeug oder ein Luftfahrzeug
CA2416861A1 (en) 2002-02-01 2003-08-01 The Or Group,Inc. Reversed air mattress
US20060075569A1 (en) * 2002-09-17 2006-04-13 Gino Giori Adjustable foam mattress
DE10358951B4 (de) * 2003-12-15 2015-02-12 Deutsche Lufthansa Ag Luftkissenanordnung für einen Passagiersitz
WO2007009270A1 (de) * 2005-07-20 2007-01-25 Prospective Concepts Ag Pneumatischer fahrzeugsitz
US11299084B2 (en) * 2019-10-16 2022-04-12 GM Global Technology Operations LLC Selectively rigidizable membrane

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608961A (en) * 1969-09-04 1971-09-28 Robert Von Heck Variable contour cushion
BE752385A (de) * 1970-06-23
FR2319999A1 (fr) * 1975-07-30 1977-02-25 Soret Procede et dispositif pour maintenir en position verticale une masse de particules

Also Published As

Publication number Publication date
WO1990007890A1 (fr) 1990-07-26
DE69005616D1 (de) 1994-02-10
JPH05500458A (ja) 1993-02-04
JP2656151B2 (ja) 1997-09-24
FR2641493A1 (fr) 1990-07-13
US5159726A (en) 1992-11-03
DK0452386T3 (da) 1994-01-24
DE69005616T2 (de) 1994-04-28
ATE99138T1 (de) 1994-01-15
ES2047911T3 (es) 1994-03-01
FR2641493B1 (fr) 1991-02-22
EP0452386A1 (de) 1991-10-23

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