EP0026668A2 - Dossier de siège avec support lombaire réglable - Google Patents

Dossier de siège avec support lombaire réglable Download PDF

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Publication number
EP0026668A2
EP0026668A2 EP80303435A EP80303435A EP0026668A2 EP 0026668 A2 EP0026668 A2 EP 0026668A2 EP 80303435 A EP80303435 A EP 80303435A EP 80303435 A EP80303435 A EP 80303435A EP 0026668 A2 EP0026668 A2 EP 0026668A2
Authority
EP
European Patent Office
Prior art keywords
seat backrest
backrest according
screw
adjusting
pad
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.)
Ceased
Application number
EP80303435A
Other languages
German (de)
English (en)
Other versions
EP0026668A3 (fr
Inventor
Otto Harold Arndt
William Leonard Wilton
Leslie Albert Gregory
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.)
Honeywell UOP LLC
Original Assignee
UOP LLC
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
Priority claimed from US06/122,152 external-priority patent/US4295681A/en
Application filed by UOP LLC filed Critical UOP LLC
Publication of EP0026668A2 publication Critical patent/EP0026668A2/fr
Publication of EP0026668A3 publication Critical patent/EP0026668A3/fr
Ceased 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
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • the present invention relates to a vehicle seat and particularly to a seat backrest of the type which includes an internal structure for selectively adjusting the seat cushion contour to provide varying degrees of lumbar support to a seated occupant.
  • the present invention seeks to provide a lumbar support for a seat back which is steplessly adjustable, is simple to operate by a seated occupant, which provides positive positioning of the lumbar support, which is capable of resisting large forces which might be exerted into the seat back and which has a very substantial range of movement while requiring very little or no additional space for installation as compared to a standard cushion.
  • the invention also provides a lumbar support which progressively increases the amount of positive support afforded by the seat cushion as the lumbar support portion is extended forwardly.
  • a seat backrest having a rigid back portion and a resilient upholstered seatback cushion member attached to said back portion, a generally horizontal lumbar pad located between said back portion and said cushion, said pad being resilient- l y biased toward said rigid back portion by said resilient cushion and being mounted to be moved away from the back portion to adjust the degree of lumbar support provided to an occupant in the seat, and which is characterised in that said pad is pivotally mounted to the outer end of a pair of divergent horizontally spaced link members; each of said spaced link members being supported at its inner end for pivotal movement about a pair of vertically spaced trunnions located on each of a pair of threaded adjusting nuts; an adjusting screw having a left-handed thread portion in engagement with one of said adjusting nuts and a right-handed thread portion in engagement with the other of said adjusting nuts; spaced bearing means for rotationally mounting said adjusting screw relative to said back portion; means on said screw for limiting axial motion of said screw relative to said bearing means; and
  • the position of maximum lumbar support can be adjusted vertically by pivoting the link members and lumbar pad by means of a pin which is engaged with an angled slot in a sliding plate.
  • the lumbar pad and support arms. can be tilted slightly up or down to cause the point of maximum lumbar support to be lower or higher, respectively, than when the support arms are not tilted.
  • This tilting movement can be provided by mounting an elongate bracket for rotational movement about the threaded shaft and providing it with a pair of longitudinal slots which engage pins extending radially from the pivot axes of the adjusting nuts.
  • a pin projecting from the elongate bracket can then engage an angled slot in a sliding plate carried by the seat back frame.
  • the pin on the elongate bracket is forced to move slightly forwardly or rearwardly due to its being in contact with the sides of the angled slot.
  • the movement of the pin causes the elongate bracket to move and the elongate bracket causes the adjusting nuts, the support arms and the lumbar pad carried by them to move also.
  • a formed metal seat back frame 10 can be seen as having a recessed pocket portion 12 defined by side portions 14 and a back portion 16.
  • a pivot shaft 18 is indicated as passing behind the seat back frame 10 and may be used to pivotally mount the seat back by means of mounting angles (not shown) to brackets 20 formed on the seat base (not shown).
  • a lumbar pad member 24 is preferably formed of metal and has a pair of struck out or welded on hinge portions 26 which each include a bent over tab portion 26'. Each tab portion 26' passes respectively through an aperture 30' and a notch 30" (see Figure 6) formed in one end of a different one of two metal link members 30 and are bent over, as best seen in Figure 4, to pivotally attach the two link members 30 to the pad member 24.
  • the link members 30 are mounted at their other ends to integral pins or trunnions 32', 32" on adjusting nuts 32 which are internally threaded to mate with right-hand and left-hand threaded portions 36', 36" on a shaft 36.
  • the links 30 are each of channel shape to permit them to overlie the shaft 36 as shown in Figure 3 when the lumbar pad is fully retracted.
  • the shaft 36 is mounted in struck out bearing portions 38' which are formed in a metal channel member 38 which is fastened, such as by welding, to the back portion 16.
  • the channel 38 stiffens the back frame 10 and spreads the loading applied by an occupant to the lumbar pad 24 across the back frame.
  • the spaced flange surfaces 38" and the web surface 38"' cooperate with the generally rectangular adjusting nuts 32 to prevent the nuts from rotating as the threaded shaft 36 is turned.
  • manual rotation of a shaft knob 40 in a clockwise direction will move the nuts 32 in an axial direction away from each other to bring the support pad 24 to the fully operative position shown in Figures 2 and 4.
  • movement of the knob 40 in a counterclockwise direction will cause the nuts 32 to approach each other and draw the support pad 24 toward its fully retracted position shown in Figure 3.
  • a tubular stop member 42 may be placed over one threaded portion 36" of the shaft as shown in Figure 4 to limit outward movement while a stop tab portion 43 may be formed out of the channel 38 to limit inward movement. Only one end stop 42 is shown since, obviously, contact with one nut will prevent further rotation of the shaft 36. Movement of the shaft 36 relative to the bearing portions 38' is prevented by resilient retaining washers 44.
  • flange and web surfaces 38" and 38"' can guide rectangular nuts 32 and prevent their rotation as explained hereinabove, their main function is to lend strength to the assembly since rotation of the nuts 32 is also prevented by the fact that their integral upper and lower pin or trunnion portions 32', 32" engage an aperture 45 and a slot 46, respectively, in the respective link member 30 while the other ends of the link members 30 are restrained against vertical movement by virtue of being attached to the lumbar pad member 24 which is mounted in a pocket 50 formed in the back surface of a foam cushion 52.
  • each link member 30 facilitates the assembly of the respective link member to the nut 32 and is as satisfactory as an aperture, since the weight of the lumbar pad assembly at the outer end of the link member will ensure that it is the recessed end portion of the slot 46 which is always loaded.
  • the lumbar pad member 24 is shown as being slightly curved and somewhat loosely mounted to the link members 30.
  • the curved shape increases its strength, reduces its loading on the foam cushion 52 along its longitudinal edges and permits a small degree of pivotal movement to take place to better conform to the loading applied by a seat occupant and thus increase comfort.
  • the threaded portions 36', 36" are preferably provided with Acme double lead threads.
  • an improved fore, aft and vertical lumbar adjustment assembly is indicated generally at 110 as being disposed in a recessed portion 112 of a seat back frame 114 having a back panel portion 116 and side panel portions 118.
  • the generally horizontal, elongate lumbar pad member 122 has a convex forward surface and is adapted to be moved by the adjustment assembly in both in and out directions and also in slightly tilting directions.
  • the lumbar pad member 122 is pivotally mounted at the outer end of pivot links 124.
  • the pivot links 124 are mounted at their inner ends for movement relative to a threaded shaft 126 which is journalled for rotation in the recessed portion 112 between the side panel portions 118.
  • the shaft 126 has right-and left-hand threaded portions 126', 126" which permit the inner ends of the links 124 to be moved axially of the shaft 126 and either toward or away from each other depending upon the direction of rotation of a manually operated fore and aft adjustment handle 128 which is mounted on the shaft 126. Tilting movement of the lumbar pad member 122 is provided by rotating a second handle 130.
  • the pad member 122 is pivotally attached to the links 124 by any suitable means such as the pair of brackets 134 which are shown as separate elements but which could also be struck out of the material of the pad member 122.
  • the inner ends of the links 124 are apertured so that they will cooperate with upper and lower trunnion pins 136, 138 which project from adjusting nut members 140, 140'.
  • the upper trunnion pins 136 are engaged by elongate, axially extending, upper trunnion engaging slots 144 formed in a bracket member 146.
  • the bracket member 146 is generally of a shallow U-shape and is mounted for a limited degree of rotation about the shaft 126 by means of apertured end bracket portions 146' which pivot about the shaft 126.
  • the amount of rotary movement of the bracket member 146 which is possible, is controlled by a pin 148 which is integrally affixed to the top of the bracket member 146.
  • the pin 148 engages the sides of an elongate angled slot 150 positioned in the surface of a sliding plate member 152.
  • the sliding plate member 152 has relieved end portions 152' and 152". It also has an adjustment nut 154 integrally attached thereto which is adapted to be engaged by a threaded adjustment screw 156 which is affixed to the second handle 130.
  • a pair of end bracket members 158 affixed to the side panel portions 118 have slots which cooperate with the relieved end portions 152', 152" to permit the plate 152 to move only in the axial direction of the adjustment screw 156.
  • bracket member 146 and the pin 148 thereon are restrained against axial movement but are free to pivot about the shaft 126, it will be readily appreciated that axial movement of the sliding plate 152 will cause the angled slot 150 to move relative to the pin 148 and force the pin 148 and the bracket member 146 which supports it to pivot slightly about the shaft 126 in either a forward or rearward direction depending upon the direction of rotation of the second handle 130. This forward or rearward movement of the bracket member 146 will, of course, cause the elongate slots 144 in said bracket member 146 to move forwardly or rearwardly.
  • a plurality of shaft support brackets 160, 162, 164 and 166 are preferably affixed to an angular support member 168 which is in turn affixed to the back panel portion 116 and have bearing surfaces which engage and support the threaded shaft 126.
  • the intermediate support brackets 162, 164 serve principally to transfer large loads applied by a seat occupant to the lumbar pad member 122 to the back frame 114 while the brackets 160 and 166 serve principally to support the shaft 126 in the region of the end bracket portions 146' and to limit axial movement of the bracket member 146.
  • the lumbar pad member 122 is shown in a substantially retracted position while in Figures 9 and 10 it is shown in its fully extended position.
  • a portion of a foam cushion 170 which would be engaged by the lumbar pad member 122 in an actual seat is shown.
  • the cushion 170 is also shown in dotted lines at 170' in the position it would assume when the lumbar pad member 122 is fully extended in a forward direction and without any tilting of the links 124. In this extended, dotted line, position one can see that the forwardmost point of maximum lumbar support of the cushion is denoted as M. Two other locations, H and L are also denoted.
  • Figures 12 and 13 illustrate the adjustment assembly 110 of Figure 7 as it appears from the front and top respectively. Although the structure has been previously described, one can see a pair of resilient retaining washers 178 have been illustrated in Figure 11 for the purpose of retaining the shaft 126 against axial movement relative to the brackets 160, 166.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
EP19800303435 1979-09-28 1980-09-29 Dossier de siège avec support lombaire réglable Ceased EP0026668A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US7986179A 1979-09-28 1979-09-28
US79861 1979-09-28
US06/122,152 US4295681A (en) 1980-02-19 1980-02-19 Seat having lumbar support and vertical height adjustment mechanism therefor
US122152 1980-02-19

Publications (2)

Publication Number Publication Date
EP0026668A2 true EP0026668A2 (fr) 1981-04-08
EP0026668A3 EP0026668A3 (fr) 1981-09-09

Family

ID=26762513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800303435 Ceased EP0026668A3 (fr) 1979-09-28 1980-09-29 Dossier de siège avec support lombaire réglable

Country Status (1)

Country Link
EP (1) EP0026668A3 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469374A (en) * 1981-11-20 1984-09-04 Namba Press Works Co., Ltd. Automotive seat
US4657304A (en) * 1986-06-06 1987-04-14 Itt Corporation Adjustable headrest
GB2231257A (en) * 1989-05-08 1990-11-14 Shiroki Corp A seat for an automobile
US4981325A (en) * 1988-08-25 1991-01-01 Dennis Zacharkow Posture support with multi-planar adjustment
US5018786A (en) * 1983-11-09 1991-05-28 Goldstein Glenn A Ergonomic adjustable chair and method
EP0458440A1 (fr) * 1990-05-21 1991-11-27 Lear Seating Corporation Mécanisme pour appui lombaire ajustable pour un siège de véhicule
EP0507644A1 (fr) * 1991-04-03 1992-10-07 Automobiles Peugeot Dispositif de réglage pour élément de soutien à matelassure
GB2259248A (en) * 1991-08-22 1993-03-10 Ikeda Bussan Co Lumbar support apparatus for vehicular seat
EP0587656A1 (fr) * 1991-06-04 1994-03-23 Henderson's Industries Pty. Ltd. Ameliorations relatives a des supports lombaires pour sieges
US5388888A (en) * 1993-02-16 1995-02-14 Keiper Pecaro Gmbh & Co. Cushion carrier for car seats
WO1996002166A1 (fr) * 1994-07-20 1996-02-01 Henderson's Industries Pty. Ltd. Ajustement d'un support lombaire
US6474743B1 (en) 2000-09-18 2002-11-05 Crown Therapeutics, Inc. Wheelchair back support assembly
US6536840B1 (en) * 1989-08-04 2003-03-25 Schukra Gerätebau AG Arching mechanism
DE102010053190A1 (de) * 2010-12-03 2012-06-06 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Rückenlehnenstruktur für einen Kraftfahrzeugsitz
DE102012015344A1 (de) * 2012-03-15 2013-03-14 Keiper Gmbh & Co. Kg Lehnenstruktur für einen Fahrzeugsitz mit neigungsverstellbarem Lehnenkopf
DE102013015529A1 (de) * 2013-09-18 2015-03-19 Faurecia Autositze Gmbh Kraftfahrzeugsitz mit einer Rückenlehne und einem daran angeordneten, neigungsverstellbaren Lehnenkopfteil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098188A (en) * 1960-03-21 1963-07-16 Studebaker Corp Charge terminating circuits

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098188A (en) * 1960-03-21 1963-07-16 Studebaker Corp Charge terminating circuits

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469374A (en) * 1981-11-20 1984-09-04 Namba Press Works Co., Ltd. Automotive seat
US5018786A (en) * 1983-11-09 1991-05-28 Goldstein Glenn A Ergonomic adjustable chair and method
US4657304A (en) * 1986-06-06 1987-04-14 Itt Corporation Adjustable headrest
US4981325A (en) * 1988-08-25 1991-01-01 Dennis Zacharkow Posture support with multi-planar adjustment
GB2231257A (en) * 1989-05-08 1990-11-14 Shiroki Corp A seat for an automobile
GB2231257B (en) * 1989-05-08 1992-08-12 Shiroki Corp A seat for an automobile
US6536840B1 (en) * 1989-08-04 2003-03-25 Schukra Gerätebau AG Arching mechanism
EP0458440A1 (fr) * 1990-05-21 1991-11-27 Lear Seating Corporation Mécanisme pour appui lombaire ajustable pour un siège de véhicule
EP0507644A1 (fr) * 1991-04-03 1992-10-07 Automobiles Peugeot Dispositif de réglage pour élément de soutien à matelassure
FR2674802A1 (fr) * 1991-04-03 1992-10-09 Peugeot Dispositif de reglage pour element de soutien a matelassure.
EP0587656A4 (en) * 1991-06-04 1994-06-08 Hendersons Ind Pty Ltd Improvements in or relating to adjustable lumbar supports for seats
EP0587656A1 (fr) * 1991-06-04 1994-03-23 Henderson's Industries Pty. Ltd. Ameliorations relatives a des supports lombaires pour sieges
US5482353A (en) * 1991-06-04 1996-01-09 Henderson's Industries Pty. Ltd. Adjustable lumbar supports for seats
US5314236A (en) * 1991-08-22 1994-05-24 Ikeda Bussan Co., Ltd. Lumbar support apparatus for vehicular seat
GB2259248B (en) * 1991-08-22 1995-07-05 Ikeda Bussan Co Lumbar support apparatus for vehicular seat
GB2259248A (en) * 1991-08-22 1993-03-10 Ikeda Bussan Co Lumbar support apparatus for vehicular seat
US5388888A (en) * 1993-02-16 1995-02-14 Keiper Pecaro Gmbh & Co. Cushion carrier for car seats
US5797652A (en) * 1994-07-20 1998-08-25 Henderson's Industries Pty Ltd. Lumbar support adjustment
WO1996002166A1 (fr) * 1994-07-20 1996-02-01 Henderson's Industries Pty. Ltd. Ajustement d'un support lombaire
US6474743B1 (en) 2000-09-18 2002-11-05 Crown Therapeutics, Inc. Wheelchair back support assembly
DE102010053190A1 (de) * 2010-12-03 2012-06-06 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Rückenlehnenstruktur für einen Kraftfahrzeugsitz
DE102012015344A1 (de) * 2012-03-15 2013-03-14 Keiper Gmbh & Co. Kg Lehnenstruktur für einen Fahrzeugsitz mit neigungsverstellbarem Lehnenkopf
DE102013015529A1 (de) * 2013-09-18 2015-03-19 Faurecia Autositze Gmbh Kraftfahrzeugsitz mit einer Rückenlehne und einem daran angeordneten, neigungsverstellbaren Lehnenkopfteil
DE102013015529B4 (de) * 2013-09-18 2020-12-24 Faurecia Autositze Gmbh Kraftfahrzeugsitz mit einer Rückenlehne und einem daran angeordneten, neigungsverstellbaren Lehnenkopfteil

Also Published As

Publication number Publication date
EP0026668A3 (fr) 1981-09-09

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB IT SE

PUAL Search report despatched

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Effective date: 19811017

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Effective date: 19831118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ARNDT, OTTO HAROLD

Inventor name: GREGORY, LESLIE ALBERT

Inventor name: WILTON, WILLIAM LEONARD