FR2596334A1 - Seat backrest with a device for adjusting the lumbar support - Google Patents

Seat backrest with a device for adjusting the lumbar support Download PDF

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Publication number
FR2596334A1
FR2596334A1 FR8604228A FR8604228A FR2596334A1 FR 2596334 A1 FR2596334 A1 FR 2596334A1 FR 8604228 A FR8604228 A FR 8604228A FR 8604228 A FR8604228 A FR 8604228A FR 2596334 A1 FR2596334 A1 FR 2596334A1
Authority
FR
France
Prior art keywords
backrest
padding
lumbar support
seat
cable
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
FR8604228A
Other languages
French (fr)
Other versions
FR2596334B1 (en
Inventor
Brigitte Weber
Rene Zago
Jean Tremeaux
Pierre Carillo
Dominique Bellot
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Priority to FR8604228A priority Critical patent/FR2596334B1/en
Publication of FR2596334A1 publication Critical patent/FR2596334A1/en
Application granted granted Critical
Publication of FR2596334B1 publication Critical patent/FR2596334B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B60N2/667—Lumbar supports having flexible support member bowed by applied forces
    • B60N2/6673—Lumbar supports having flexible support member bowed by applied forces with motor driven adjustments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/64—Back-rests or cushions
    • B60N2/66—Lumbar supports
    • B60N2/667—Lumbar supports having flexible support member bowed by applied forces
    • B60N2/6671—Lumbar supports having flexible support member bowed by applied forces with cable actuators

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

Seat backrest with a device for adjusting the lumbar support consisting of a deformable means 8 incorporated into the backrest and an external control means 10 acting on the said deformable means so as to cause the curvature of the lumbar support surface to vary and in which means 10 a reinforcing member 2 for the backrest carries an elastic suspension 3 serving as a support to padding 5, characterised in that the deformable means 8 is mounted at the rear of the elastic suspension 3 with respect to the padding 5 and comprises an elastic median zone.

Description

DOSSIER DE SIEGE AVEC DISPOSITIF DE REGLAGE DE L' APPUI
LOMBAIRE
L'invention concerne un dossier de siège àvec dispositif de réglage de 1' appui lombaire constitué par un moyen déformable incorporé au dossier et un moyen à commande extérieure agissant sur ledit moyen déformable pour faire varier la courbure de la surface d' appui lombaire.SEAT BACK WITH SUPPORT ADJUSTMENT DEVICE
LUMBAR
The invention relates to a seat back with a lumbar support adjustment device constituted by a deformable means incorporated in the back and an externally controlled means acting on said deformable means to vary the curvature of the lumbar support surface.

L'invention a pour but de faciliter à l'occupant du siège, le réglage de la surface d'appui du dos de manière simple et aisée de façon que le profil du dossier soit mieux adapté à assurer au niveau de la région lombaire le maintien de la colonne verticale.The object of the invention is to make it easier for the seat occupant to adjust the support surface of the back in a simple and easy manner so that the profile of the backrest is better suited to ensuring that the lumbar region is maintained. of the vertical column.

On connaît par la publication FR-A-2 476 995 un dispositif d'appui formé par une sangle de dossier, qui constitue 1' appui de la matelassure du coussin de ce dossier et qui peut être tendue à une autre extrémité.Publication FR-A-2 476 995 discloses a support device formed by a back strap, which constitutes the support of the cushion padding of this backrest and which can be stretched at another end.

Un tel dispositif favorise la formation d'une zone d' appui lombaire le long de laquelle la répartition sensiblement uniforme de la pression de contact nuit au bon confort du dossier.Such a device promotes the formation of a lumbar support zone along which the substantially uniform distribution of the contact pressure harms the comfort of the backrest.

On connaît par la publication FR-A-2 447 168 un dispositif de réglage de
I' appui lombaire au moyen d' un ressort en fil ondulé en appui contre la matelassure du dossier qui est fixé par une extrémité à 1' armature du dossier et dont 1' autre extrémité est accrochée à un moyen de réglage pour modifier la tension et la courbure du fil.Publication FR-A-2 447 168 discloses a device for adjusting the
I lumbar support by means of a corrugated wire spring resting against the padding of the backrest which is fixed by one end to the frame of the backrest and the other end of which is attached to an adjustment means to modify the tension and the curvature of the wire.

Le dossier de siège ainsi équipé utilise en partie une nappe spéciale de suspension de la matelassure du dossier inadaptée aux dossiers existants.The seat backrest thus equipped partly uses a special suspension pad for the back padding, which is unsuitable for existing backrests.

L'invention a donc pour oblet un dossier de siège du type comportant une armature de dossier portant une suspension élastique servant de support à une matelassure, un moyen déformable incorporé au dossier et un moyen à commande extérieure agissant sur ledit moyen déformable pour faire varier la courbure de la surface d' appui lombaire.The invention therefore has as its oblivion a seat back of the type comprising a back frame carrying an elastic suspension serving as support for a padding, a deformable means incorporated in the back and an externally controlled means acting on said deformable means to vary the curvature of the lumbar support surface.

Selon l'invention, le moyen déformable est monté en arrière de la suspension élastique par rapport à la matelassure et comporte une zone médiane élastique.According to the invention, the deformable means is mounted behind the elastic suspension relative to the padding and comprises an elastic middle zone.

Le dossier de siège ainsi réalisé permet de régler à la demande la longueur du moyen déformable compris entre un point d' ancrage adjacent à un premier côté du dossier et le moyen à commande extérieure adjacent à 1' autre côté du dossier.The seat backrest thus produced makes it possible to adjust on request the length of the deformable means comprised between an anchoring point adjacent to a first side of the backrest and the externally controlled means adjacent to the other side of the backrest.

Sans sortir du cadre de l'invention il sera évidemment possible d' utiliser plusieurs moyens déformables disposés le long de la hauteur du dossier, afin que le réglage puisse être effectué sur une plus grande longueur de
I' appui dorsal, un moyen à commande extérieure étant associé à chaque moyen déformable.Without departing from the scope of the invention it will obviously be possible to use several deformable means arranged along the height of the backrest, so that the adjustment can be carried out over a greater length of
I 'back support, an external control means being associated with each deformable means.

L'invention sera décrite plus en détail en référence aux dessins qui représentent de façon schématique un mode de réalisation du dossier équipé du dispositif de réglage lombaire sur lesquels : - la figure 1 est une représentation perspective d' une armature de dossier
équipée du dispositif.The invention will be described in more detail with reference to the drawings which schematically represent an embodiment of the backrest equipped with the lumbar adjustment device in which: - Figure 1 is a perspective representation of a backrest frame
equipped with the device.

- la figure 2 est une vue en coupe longitudinale de 1' armature selon la
ligne 2-2 de la figure 1.- Figure 2 is a longitudinal sectional view of the frame according to the
line 2-2 of figure 1.

Selon la figure 1 le dossier est constitué par une armature 2 à laquelle est fixée une suspension élastique 3 constituée à titre d' exemple par un treillis de fils relié élastiquement aux montants 4 du dossier.According to FIG. 1, the backrest is constituted by a frame 2 to which an elastic suspension 3 is fixed, constituted, for example, by a trellis of wires elastically connected to the uprights 4 of the backrest.

La suspension 3 supporte une matelassure 5 formée par un coussin de mousse revêtu d' une garniture d'habillage. The suspension 3 supports a padding 5 formed by a foam cushion coated with a trim.

Les deux éléments latéraux verticaux 6 du treillis portent respectivement une cale 7 disposée sensiblement au niveau de 1' appui lombaire de 1' occupant du siège dont chacune est constituée par deux organes assemblés de pincement des éléments 6 du treillis.The two vertical lateral elements 6 of the trellis respectively carry a wedge 7 disposed substantially at the level of the lumbar support of the occupant of the seat, each of which consists of two assembled members for pinching the elements 6 of the trellis.

Les cales 7 constituent l'appui d' un cable 8 et plus généralement celui d' un moyen déformable à raideur faible tel qu' un lien dont la partie médiane située entre les cales 7 porte un ressort 9 ou tout autre organe à longueur élastiquement variable. La partie active du moyen déformable est de la sorte située en arrière de la suspension 3 par rapport à la matelassure 5.The wedges 7 constitute the support of a cable 8 and more generally that of a deformable means with low stiffness such as a link whose median part located between the wedges 7 carries a spring 9 or any other member of elastically variable length. . The active part of the deformable means is thus located behind the suspension 3 relative to the padding 5.

Le moyen déformable ainsi réalisé à la particularité de posséder à 1' état non tendu une raideur latérale faible et une raideur médiane plus forte et à 1' état tendu une raideur médiane plus faible.The deformable means thus produced has the particularity of having in the untensioned state a weak lateral stiffness and a stronger median stiffness and in the stretched state a lower median stiffness.

Sous I' effet de la charge exercée par le dos de 1' occupant du siège, le câble 8 offre ainsi à la matelassure une résistance suffisante à la formation d' une zone d'appui lombaire et une résistance compatible avec le confort exigé du siège.Under the effect of the load exerted by the back of the seat occupant, the cable 8 thus provides the padding with sufficient resistance to the formation of a lumbar support zone and a resistance compatible with the comfort required of the seat .

L'extrémité du câble 8 est ancrée à 1' un des montants 4 du dossier Un moyen à commande extérieure 10 assure un effort de tension sur l'autre extrémité du câble 8.The end of the cable 8 is anchored to one of the uprights 4 of the backrest. An externally controlled means 10 provides a tension force on the other end of the cable 8.

Ainsi que cela est représenté à la figure 2, le câble 8 est enroulé sur un axe 11 du moyen 10 portant un pignon 12 mis en mouvement par une vis sans fin 13 actionnée une manette 14 ou tout autre moyen connu.As shown in Figure 2, the cable 8 is wound on an axis 11 of the means 10 carrying a pinion 12 set in motion by an endless screw 13 actuated a handle 14 or any other known means.

L'ensemble des organes 11-12-13 est enfermé dans un boîtier rapporté sur I'autre montant 4 du siège et forment avec la manette 14 un exemple de réalisation du moyen 10.All of the members 11-12-13 are enclosed in a housing attached to the other upright 4 of the seat and form, with the lever 14, an exemplary embodiment of the means 10.

Sans sortir du cadre de l'invention le moyen 10 pourrait tout aussi bien être constitué par un moto-réducteur M dont 1' alimentation serait asservie à la charge de la zone lombaire du dossier détectée par un capteur 20 piezo électrique monté dans le câble 8. Without departing from the scope of the invention, the means 10 could equally well be constituted by a geared motor M, the power supply of which would be controlled by the load on the lumbar region of the backrest detected by a piezoelectric sensor 20 mounted in the cable 8 .

La tension de sortie du capteur 20 correspondant à un seuil de charge déterminé est alors envoyée dans un circuit électronique 30 amplificateur dont le courant de sortie assure 1' alimentation de moteur M et son arrêt automatique à une autre valeur de seuil.The output voltage of the sensor 20 corresponding to a determined load threshold is then sent to an electronic amplifier circuit 30, the output current of which supplies the motor M and its automatic shutdown at another threshold value.

Le capteur 20 peut également détecter une réduction de charge consécutive à une modification de la posture de 1' occupant par exemple lorsque ce dernier quitte le siège ou procède à l'inclinaison du dossier.The sensor 20 can also detect a reduction in load following a change in the posture of the occupant, for example when the latter leaves the seat or proceeds to tilt the backrest.

Dans ce cas le capteur délivre un signal nul et le circuit 30 assure
Il inversion du sens de rotation du moteur puis son arrêt automatique.In this case the sensor delivers a zero signal and the circuit 30 ensures
It reverses the direction of rotation of the motor then its automatic stop.

On comprend aisément que le dispositif de réglage mécanique ou électrique peut s' adapter aisément aux sièges comportant d' autres types de suspensions telles que celles utilisant une nappe textile ou à ressorts ondulés.It is easily understood that the mechanical or electrical adjustment device can easily be adapted to seats comprising other types of suspensions such as those using a textile sheet or with wavy springs.

Le mode de fonctionnement du dispositif découle bien entendu de la description précitée en remarquant que la tension du câble 8 modifie localement la position de la suspension 3 et permet de repousser la matelassure 5 vers 1' avant c' est-à-dire dans le sens de la réalisation d' un appui lombaire. The mode of operation of the device naturally follows from the above description by noting that the tension of the cable 8 locally modifies the position of the suspension 3 and makes it possible to push the padding 5 towards the front, that is to say in the direction of the realization of a lumbar support.

Claims (4)

REVENDICATIONS 1. Dossier de siège avec dispositif de réglage de l'appui lombaire constitué par un moyen déformable (8) incorporé au dossier et un moyen à commande extérieure (10, M) agissant sur ledit moyen déforrnable pour faire varier la courbure de la surface d' appui lombaire et dans lequel une armature (2) de dossier porte une suspension élastique (3) servant de support à une matelassure (5), caractérisé par le fait que le moyen déformable (8) est monté en arrière de la suspension élastique (3) par rapport à la matelassure (5) et comporte une zone médiane élastique.1. Seat back with lumbar support adjustment device constituted by a deformable means (8) incorporated in the back and an externally controlled means (10, M) acting on said deformable means to vary the curvature of the surface d lumbar support and in which a back frame (2) carries an elastic suspension (3) serving as support for a padding (5), characterized in that the deformable means (8) is mounted behind the elastic suspension ( 3) relative to the padding (5) and has an elastic middle zone. 2. Dossier de siège selon la revendication 1, caractérisé par le fait que le moyen déformable est constitué par un câble (8) dont une extrémité est ancrée à un montant (4) latéral de 1' armature du dossier et dont I'autre extrémité est enroulée sur un axe (11) du moyen à commande extérieure (10, M) et qui prend appui sur des cales (7) de poussée portés par la suspension (3) agissant simultanément à repousser la matelassure (5) vers l'avant sous 1' action du moyen à commande extérieure (10) agissant dans le sens d' un accroissement de la tension du câble.2. Seat backrest according to claim 1, characterized in that the deformable means consists of a cable (8), one end of which is anchored to a post (4) lateral to the frame of the backrest and the other end of which is wound on an axis (11) of the externally controlled means (10, M) and which is supported on thrust wedges (7) carried by the suspension (3) acting simultaneously to push the padding (5) forward under the action of the externally controlled means (10) acting in the direction of increasing the tension of the cable. 3. Dossier de siège selon la revendication 2, caractérisé par le fait que le moyen à commande extérieure comprend au moins un organe de commande (14) d'une vis (13) d'entraînement d'un pignon de renvoi portant l'axe (il) d'enroulement du câble (8). 3. Seat backrest according to claim 2, characterized in that the external control means comprises at least one control member (14) of a screw (13) driving a return pinion carrying the axis (it) for winding the cable (8). 4. Dossier de siège selon la revendication 2, caractérisé par le fait que le dossier porte un moyen capteur (20) de charge dont le signal de sortie alimente un circuit (30) de commande du moyen à commande extérieure (M). 4. Seat backrest according to claim 2, characterized in that the backrest carries a load sensor means (20) whose output signal feeds a circuit (30) for controlling the means with external control (M).
FR8604228A 1986-03-25 1986-03-25 SEAT FOLDER WITH LUMP SUPPORT ADJUSTMENT DEVICE Expired - Lifetime FR2596334B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8604228A FR2596334B1 (en) 1986-03-25 1986-03-25 SEAT FOLDER WITH LUMP SUPPORT ADJUSTMENT DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8604228A FR2596334B1 (en) 1986-03-25 1986-03-25 SEAT FOLDER WITH LUMP SUPPORT ADJUSTMENT DEVICE

Publications (2)

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FR2596334A1 true FR2596334A1 (en) 1987-10-02
FR2596334B1 FR2596334B1 (en) 1990-10-05

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623639A1 (en) * 1987-11-23 1989-05-26 Mecaplast Sam Travel limiter device
WO1993005683A1 (en) * 1991-09-24 1993-04-01 Hendersons Industries Pty. Ltd. Lumbar support
EP0582821A1 (en) * 1992-07-27 1994-02-16 FIAT AUTO S.p.A. A back support element for seats, particularly motor-vehicle seats
WO1994025307A1 (en) * 1993-04-30 1994-11-10 Ameu Management Corp. Device for adjusting the height and or curvature of an elastically flexible supporting component of a seat back
WO1998007590A1 (en) * 1996-08-23 1998-02-26 Youngflex A.G. Improved seat suspension arrangement and adjustment mechanism therefor
WO2003005859A3 (en) * 2001-07-11 2003-09-04 Alfmeier Corp Integrated adjustable lumbar support and trim attachment system
DE10246823A1 (en) * 2002-10-08 2004-04-22 Fico Cables, Lda. Actuating mechanism for a lumbar support
EP1680984A1 (en) * 2005-01-12 2006-07-19 L&P Swiss Holding Company Lumbar support assembly and corresponding seat structure
EP1733649A1 (en) * 2005-06-15 2006-12-20 L&P Swiss Holding Company Guiding element, support assembly and corresponding seat structure
US7425036B2 (en) 2005-08-23 2008-09-16 Schukra Of North America, Ltd. Comfort belt spring pulley
US7530636B2 (en) 2004-12-03 2009-05-12 L&P Property Management Company Comfort belt lumbar
US7690726B2 (en) 2005-01-12 2010-04-06 L&P Swiss Holding Company Coupling unit and adjusting mechanism using the coupling unit
US7780233B2 (en) 2005-06-02 2010-08-24 Schukra Of North America, Ltd. Belt extension apparatus
DE102009055841A1 (en) * 2009-11-26 2011-06-01 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Detroit Backrest for motor vehicle seat, has relaxed supporting rope fastened to backrest frame such that supporting mat under tension of supporting rope is pressed forward and supported
US7997650B2 (en) 2008-02-22 2011-08-16 Schukra Of North America Constant pressure retreating lumbar system
US9604560B1 (en) 2015-11-13 2017-03-28 Kongsberg Automotive, Inc. Assembly for adjusting a lumbar region of a seat
US10427569B2 (en) 2015-01-26 2019-10-01 Kongsberg Automotive, Inc. Adjustment mechanism for a seat
CN111002877A (en) * 2018-10-04 2020-04-14 丰田自动车株式会社 Vehicle seat

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AT394829B (en) 1989-08-04 1992-06-25 Schuster Wilhelm BACKREST FOR A VEHICLE SEAT, WITH AN ADJUSTABLE LUMBAR REST
DE4320105C1 (en) 1993-06-17 1994-10-13 Ameu Management Corp Adjustment device for a flexurally elastic supporting element of a backrest
US6619739B2 (en) 2001-03-01 2003-09-16 L & P Property Management Company Universal ergonomic support with self-contained actuator
US6758522B2 (en) 2001-03-29 2004-07-06 L&P Property Management Company Apparatus and method for varying coefficients of friction in a variable apex back support
US6652028B2 (en) 2001-11-02 2003-11-25 L & P Property Management Apparatus and method for lumbar support with variable apex
US6676214B2 (en) 2001-11-16 2004-01-13 L & P Property Management Company Method and apparatus for lumbar support with integrated actuator housing
US6779844B2 (en) 2001-12-14 2004-08-24 L&P Propety Maqnagement Company Arching lumbar support with weight distribution surface
US6652029B2 (en) 2001-12-20 2003-11-25 L & P Property Management Company Unitized back plate and lumbar support
US7775595B2 (en) 2004-02-06 2010-08-17 Schukra Of North America Drive mechanism
DE602005011627D1 (en) 2004-07-30 2009-01-22 L & P Property Management Co MODULAR LUMBAR SUPPORT DEVICE
US7862119B2 (en) 2005-04-08 2011-01-04 Alfmeier Prazision Ag Baugruppen Und Systemlosungen Vehicle seat with lordosis support
US7984949B2 (en) 2007-04-24 2011-07-26 Schukra Of North America Lumbar and bolster support for second row seat

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DE1276470B (en) * 1962-12-22 1968-08-29 Volkswagenwerk Ag Backrest with adjustable back support for vehicle seats
DE1914154A1 (en) * 1969-03-20 1971-06-16 Audi Nsu Auto Union Ag Backrest with adjustable lumbar support for motor vehicles
FR2447168A1 (en) * 1979-01-26 1980-08-22 Sable Freres Int Tractor seat back rest with adjustable transverse curvature - uses horizontal bar with vertical undulation screw jack to modify arched profile
FR2476995A1 (en) * 1980-02-29 1981-09-04 Deutsher Pty Ltd SEAT WITH ADJUSTABLE BACKREST
US4565406A (en) * 1984-03-29 1986-01-21 Tachikawa Spring Co., Ltd. Lumbar support device

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DE1276470B (en) * 1962-12-22 1968-08-29 Volkswagenwerk Ag Backrest with adjustable back support for vehicle seats
DE1914154A1 (en) * 1969-03-20 1971-06-16 Audi Nsu Auto Union Ag Backrest with adjustable lumbar support for motor vehicles
FR2447168A1 (en) * 1979-01-26 1980-08-22 Sable Freres Int Tractor seat back rest with adjustable transverse curvature - uses horizontal bar with vertical undulation screw jack to modify arched profile
FR2476995A1 (en) * 1980-02-29 1981-09-04 Deutsher Pty Ltd SEAT WITH ADJUSTABLE BACKREST
US4565406A (en) * 1984-03-29 1986-01-21 Tachikawa Spring Co., Ltd. Lumbar support device

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623639A1 (en) * 1987-11-23 1989-05-26 Mecaplast Sam Travel limiter device
GB2275188B (en) * 1991-09-24 1995-10-11 Hendersons Ind Pty Ltd Lumbar support
WO1993005683A1 (en) * 1991-09-24 1993-04-01 Hendersons Industries Pty. Ltd. Lumbar support
GB2275188A (en) * 1991-09-24 1994-08-24 Hendersons Ind Pty Ltd Lumbar support
EP0582821A1 (en) * 1992-07-27 1994-02-16 FIAT AUTO S.p.A. A back support element for seats, particularly motor-vehicle seats
AU680249B2 (en) * 1993-04-30 1997-07-24 Schukra-Geratebau Gmbh Device for adjusting the height and or curvature of an elastically flexible supporting component of a seat back
US5704687A (en) * 1993-04-30 1998-01-06 Ameu Management Corp. Apparatus for the level adjustment and/or arching adjustment of a flexibly resilient support element of a back rest of a seat
WO1994025307A1 (en) * 1993-04-30 1994-11-10 Ameu Management Corp. Device for adjusting the height and or curvature of an elastically flexible supporting component of a seat back
WO1998007590A1 (en) * 1996-08-23 1998-02-26 Youngflex A.G. Improved seat suspension arrangement and adjustment mechanism therefor
US6152531A (en) * 1996-08-23 2000-11-28 Youngflex Ag Seat suspension arrangement and adjustment mechanism therefore
EP1416831A4 (en) * 2001-07-11 2008-02-06 Alfmeier Corp Integrated adjustable lumbar support and trim attachment system
WO2003005859A3 (en) * 2001-07-11 2003-09-04 Alfmeier Corp Integrated adjustable lumbar support and trim attachment system
EP1416831A2 (en) * 2001-07-11 2004-05-12 Alfmeier Corporation Integrated adjustable lumbar support and trim attachment system
DE10246823A1 (en) * 2002-10-08 2004-04-22 Fico Cables, Lda. Actuating mechanism for a lumbar support
US7530636B2 (en) 2004-12-03 2009-05-12 L&P Property Management Company Comfort belt lumbar
EP1680984A1 (en) * 2005-01-12 2006-07-19 L&P Swiss Holding Company Lumbar support assembly and corresponding seat structure
US7841661B2 (en) 2005-01-12 2010-11-30 L&P Swiss Holding Company Lumbar support assembly and corresponding seat structure
US7690726B2 (en) 2005-01-12 2010-04-06 L&P Swiss Holding Company Coupling unit and adjusting mechanism using the coupling unit
WO2006074714A1 (en) * 2005-01-12 2006-07-20 L & P Swiss Holding Company Lumbar support assembly and corresponding seat structure
JP2008525133A (en) * 2005-01-12 2008-07-17 エル アンド ピー スイス ホールディング カンパニー Lumbar support assembly and corresponding seat structure
US7780233B2 (en) 2005-06-02 2010-08-24 Schukra Of North America, Ltd. Belt extension apparatus
WO2006133912A3 (en) * 2005-06-15 2007-03-08 L&P Swiss Holding Co Guiding element, support assembly and corresponding seat structure
EP1733649A1 (en) * 2005-06-15 2006-12-20 L&P Swiss Holding Company Guiding element, support assembly and corresponding seat structure
WO2006133912A2 (en) * 2005-06-15 2006-12-21 L & P Swiss Holding Company Guiding element, support assembly and corresponding seat structure
US7425036B2 (en) 2005-08-23 2008-09-16 Schukra Of North America, Ltd. Comfort belt spring pulley
US7997650B2 (en) 2008-02-22 2011-08-16 Schukra Of North America Constant pressure retreating lumbar system
DE102009055841A1 (en) * 2009-11-26 2011-06-01 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Detroit Backrest for motor vehicle seat, has relaxed supporting rope fastened to backrest frame such that supporting mat under tension of supporting rope is pressed forward and supported
US10427569B2 (en) 2015-01-26 2019-10-01 Kongsberg Automotive, Inc. Adjustment mechanism for a seat
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CN111002877A (en) * 2018-10-04 2020-04-14 丰田自动车株式会社 Vehicle seat
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FR2596334B1 (en) 1990-10-05

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