WO1989009005A1 - Bande de ceinture de support lombaire et mecanisme prevu a cet effet - Google Patents

Bande de ceinture de support lombaire et mecanisme prevu a cet effet Download PDF

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Publication number
WO1989009005A1
WO1989009005A1 PCT/AU1989/000137 AU8900137W WO8909005A1 WO 1989009005 A1 WO1989009005 A1 WO 1989009005A1 AU 8900137 W AU8900137 W AU 8900137W WO 8909005 A1 WO8909005 A1 WO 8909005A1
Authority
WO
WIPO (PCT)
Prior art keywords
bracket
lumbar support
rocking member
section
integrally formed
Prior art date
Application number
PCT/AU1989/000137
Other languages
English (en)
Inventor
Manfred Heinrich Geitz
Robert John Hillyard
Original Assignee
Henderson's Federal Spring Works Pty. Ltd.
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 Henderson's Federal Spring Works Pty. Ltd. filed Critical Henderson's Federal Spring Works Pty. Ltd.
Priority to KR1019890702224A priority Critical patent/KR900700043A/ko
Publication of WO1989009005A1 publication Critical patent/WO1989009005A1/fr

Links

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
    • 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
    • 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

Definitions

  • This invention relates to lumbar support apparatus and mechanism for seating and relates particularly but not exclusively to such apparatus and mechanisms for motor vehicle seating.
  • Adjustable lumbar supports are provided in motor vehicles to provide for differing driver requirements and to increase driver or passenger comfort.
  • Many adjustable lumbar supports are known and described in US Patents 3948558, 3973797, 4462635, 4531779, 4534592, 4564235, 4630865, 4632454 and 4714291 and in Australian patent or patent application Nos. 72822/87, 80449/82, 19524/83, 47090/85 (575427), 63973/86 and 72609/87.
  • the support comprises a "waist band" extending between two brackets fixed within and on either side of the frame of a vehicle seat.
  • the waist band is pivotally attached to the bracket in a fixed position by way of a pivot pin.
  • the pivot pin which generally includes a nylon or other bush is fixed in pivotal arrangement by an appropriately formed plate which encircles the pivot pin and bush and terminates in two parallel spaced apart plates.
  • the waist band is inserted between the plates. and fixed by appropriate means such as riveting.
  • the waist band is again pivotally attached to a bracket in a manner similar to that described above.
  • the bracket however includes adjustment means to reduce or increase the distance between the ends of the waist band to enable the required adjustable lumbar support.
  • the adjustment is provided by forming the bracket in two parts which are hinged or pivotally fixed on the moveable part which acts as a cam follower.
  • a cam which may be a continuous or stepped cam is operated by an appropriate handle attached to a spindle to permit the desired adjustment.
  • a lumbar support as is described in the above mentioned patent application requires many parts including the fixed bracket, pivot pin and bush, the waist band plate, the waist band, a further waist band place and associated pivot and bush, a two part bracket pivotably connected to permit appropriate adjustment all in addition to the cam, the cam drive spindle and handle.
  • the waist band may be a belt or belt like band of any suitable material. It is customary that waist bands are made of a stiff but flexible material such as a sheet of nylon, polypropylene polyethylene or the like. It is also customary that a pad of resilient foam is attached to one side of the waist band to provide additional cushioning to the lumbar region of the seat when fitted with such a device and waist band.
  • the present invention therefore provides in one preferred form an adjustable lumbar support for a seat which comprises:— a first bracket adapted to be fixed on one side frame of the seat; • a second bracket adapted to be fixed to the other side frame of the seat, said bracket including a pivotally attached rocking member adapted to be moved smoothly or step-wise through one or more intermediate positions between a first and second position by operation of adjustment means; said first bracket and said rocking member including attachment means adapted to permanently or releasably engage with attachment means on a waist band adapted to extend between said first and second brackets.
  • said adjustment means comprises cam means disposed within the second bracket and a cam following means integrally formed on the rocking member.
  • the waist band is integrally formed in one piece with attachment means adapted to releasably engage with the attachment means of said first bracket and the attachment means on the rocking member of the second bracket.
  • the present invention also provides an adjustment bracket for a seat lumbar support which comprises: an integrally formed fixed bracket section comprising a plate adapted to be fixed to a seat frame side member, said bracket section having a forward, lower and rear section integrally formed from a metal plate formed in a substantially U shape, said rear section including upwardly extending locating means; .
  • an integrally formed rocking member having an upper plate and side plate section, said upper plate section including orifices adapted to receive and co-operate with the upwardly extending locating means of the fixed bracket to permit relative rocking movement between said fixed bracket section and said rocking member on operation of a cam disposed within the fixed bracket section, said rocking member including a cam following means on said upper plate and attachment means, said side plate sections including means adapted to releasably engage and hold a lumbar support waist band.
  • the locating means comprise upwardly extending table or lugs integrally formed on the rear section of the bracket section.
  • the tabs or lugs also serve to hold the bracket section and the rocking member together when assembled.
  • the holding of the bracket section and the rocking member is accomplished by deformation or bending of the tabs or lugs.
  • the invention in another form also provides an integrally moulded lumbar support .
  • a waist band having bracket attachment means at at least one end thereof.
  • the bracket attachment means are adapted to releasably snap fit with, a a lumbar support bracket as hereinbefore or hereinafter described.
  • the waist band is integrally formed or moulded from a plastics material such as nylon, polypropylene or polyethylene.
  • Fig. 1 is a partial "plan" view of one lumbar support apparatus constructed in accordance with the invention
  • Fig. 2 is a side “view” of the apparatus of Fig. 1
  • Fig. 3 is a perspective view of one first bracket in accordance with the invention
  • Fig. 4 is a plan view of the integrally formed fixing means on a waist band in accordance with another form of the invention
  • Fig. 5 is a cross sectional (5-5) view of the band of Fig.
  • Fig. 6 is a perspective view of a further embodiment of waist band in accordance with the invention.
  • the terms "plan” and “side” view or elevation do not strictly refer to the apparatus in situ but refer to the apparatus as shown.
  • an adjustable bracket 20 having a fixed member 22, for attachment (by means not shown) to seat side frame 21, and a rocking member 23.
  • the fixed member 22 is formed in one piece from an appropriately dimensioned metal plate to form a substantially U-shaped (in cross section) member having a front plate section 24, a lower plate section 25 and a rear plate section 26.
  • Rear plate section 26 includes two upwardly extending lugs 27, the purpose of which will become apparent.
  • the space within the front, lower and rear plate sections is adapted to receive cam device 28 which is operated via cam spindle 29 and hand wheel 30.
  • the rocking member 23 is similarly formed in one piece from an appropriately dimensioned metal plate to form a further substantially U-shaped (in cross section) member having side 31, 32 and top plate 33 sections.
  • Side plate sections 31, 32 include substantially parallel arms which extend downwardly and terminate with waist band engaging means 34 which comprise a greater than semi circular notch 35 disposed in the forward edge of each of the arms. The notch enables a releasable snap fit connection with the waist band as will be later described.
  • the top plate section 33 of the rocking member 23 includes two slots 36 adapted to receive and pivotally co-operate with the lugs 27 of the fixed member to enable pivotal movement of the rocking member 23 with respect to the fixed member 22 when the cam 28 is operated.
  • the motion of the cam 28 translates to the rocking member by way of cam follower 37.
  • the cam follower 37 is integrally formed as part of the rocking member 23 by forming a forwardly and downwardly projecting lug on the top plate section 33 of the rocking member 23 during its fabrication from metal plate as described above.
  • the lugs 27, following assembly of the bracket are bent rearwardly (or otherwise deformed) so that the fixed member and rocking member are permanently (in normal usage situations) connected together in a manner which enables limited pivotal or rocking motion between the fixed member 22 and the rocking member 23 as the cam and hand wheel is operated.
  • the cam which may be a uniformly spirally increasing cam or a step wise increasing cam with a series of flat surfaces at increasing radial distances from the pivotal axis of the cam, when operated causes the rocking member to move forwardly and rearwardly and increase or decrease the distance between the bracket 20 fixed on one side frame of a seat and another bracket 38 (non adjustable) fixed on the opposite side frame of the seat.
  • This motion in turn, as is well known, causes the waist belt to provide greater or lesser support in the lumbar region of the seat to which the device is attached.
  • a simple fixed bracket for attachment (by means not shown) to the opposite side frame of a seat to the adjustable bracket described above.
  • the bracket 38 is, as with previously described parts, formed in one piece from an appropriately shaped metal plate.
  • the bracket 38 comprises a fixing plate 39 and two substantially parallel side plates 40. Again each of the side plates 40 include downwardly directed arms which terminate in notches 35 as described with respect to bracket 20.
  • the notches again are disposed forwardly (that is to say disposed away from the corresponding bracket on the other side seat frame) to form lock means and enable snap fitting of a waist band appropriately dimensioned.
  • FIG. 4 and 5 there is shown another preferred embodiment of this invention.
  • the waist band 41 has an integrally formed or moulded end portion 42 and belt section 43.
  • the end portion 42 comprises an extension 44 of the belt section 43 and includes side flanges 45 and crosswise flange 46.
  • the flanges 45 and 46 extend equally above and below the extension to support extension 44.
  • the side flanges 45 extend from the end 47 of the extension 44 to the cross flange 46 and thereafter taper towards the belt portion 43.
  • Slots 48 are provided in the end portion to accommodate the lock means of the bracket 20 or 38 which pass through the slots.
  • lugs 49 are situated immediately forward of the slots to enable snap fit engagement with the brackets as previously described. If it is desired to provide a waist band having a greater width than the width between the side flange 45, an additional flange 50 may be provided to enable the width of the belt to be increased and suitably supported or strengthened.
  • Fig. 6 there is shown a further embodiment of waist band end in accordance with the invention.
  • the waist band 51 terminates in cylindrical end piece 52 having laterally extending lugs 53.
  • the lugs 53 of substantially circular cross section are dimensioned to snap fit within e.g. notch 35 of bracket 20 or similar attachment/lode means of bracket 38.
  • the waist band is preferably formed by moulding in one piece from any suitable material such as hereinbefore described.
  • the belt portion tapers from the end piece to assume the final desired thickness of band as required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

On a mis au point un support réglable pour un support lombaire de siège, comprenant un premier support (38) adapté pour être fixé sur le cadre latéral dudit siège. Il comprend également un second support (20) adapté pour être fixé à l'autre cadre latérale du siège, ledit support comportant un élément (23) basculant fixé, adapté pour être déplacé en douceur ou de manière progressive dans une ou plusieurs positions intermédiaires entre une première et une seconde position par l'actionnement de moyens de réglage (28/29). Ledit premier support et ledit élément basculant comportent un moyen de fixation (34) adapté pour s'engager de manière permanente ou libérable avec des moyens de fixation (48/49) sur une bande de ceinture (41) adaptée pour s'étendre entre lesdits premier et second supports.
PCT/AU1989/000137 1988-03-31 1989-03-30 Bande de ceinture de support lombaire et mecanisme prevu a cet effet WO1989009005A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019890702224A KR900700043A (ko) 1988-03-31 1989-03-30 허리지지용 허리밴드 및 그 기구(Lumbar support waist band and mechanism therefor)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPI754088 1988-03-31
AUPI7540 1988-08-31

Publications (1)

Publication Number Publication Date
WO1989009005A1 true WO1989009005A1 (fr) 1989-10-05

Family

ID=3772980

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1989/000137 WO1989009005A1 (fr) 1988-03-31 1989-03-30 Bande de ceinture de support lombaire et mecanisme prevu a cet effet

Country Status (4)

Country Link
EP (1) EP0407431A4 (fr)
KR (2) KR900700043A (fr)
CA (1) CA1298771C (fr)
WO (1) WO1989009005A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994024904A1 (fr) * 1993-04-30 1994-11-10 Henderson's Industries Pty. Ltd. Support lombaire ajustable
US6254186B1 (en) 1996-09-05 2001-07-03 Henderson's Industries Pty Ltd Adjustable lumbar support

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973797A (en) * 1975-03-31 1976-08-10 Deere & Company Seat backrest having an adjustable lumbar support
AU8044982A (en) * 1982-02-12 1983-08-18 Kunimatsu Kogyo Co., Ltd. Lumbar support
US4462635A (en) * 1980-02-29 1984-07-31 Lance Mark A Seat with adjustable back support
US4531779A (en) * 1983-01-24 1985-07-30 Namba Press Works Co., Ltd. Automotive seat with lumbar support
US4564235A (en) * 1984-11-09 1986-01-14 Tachikawa Spring Co., Ltd. Lumbar support device
AU4709085A (en) * 1984-03-29 1987-03-12 Tachikawa Spring Co. Ltd. Lumbar support

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2035792B (en) * 1978-12-01 1982-11-24 Chrysler Uk Webbing for seats

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973797A (en) * 1975-03-31 1976-08-10 Deere & Company Seat backrest having an adjustable lumbar support
US4462635A (en) * 1980-02-29 1984-07-31 Lance Mark A Seat with adjustable back support
AU8044982A (en) * 1982-02-12 1983-08-18 Kunimatsu Kogyo Co., Ltd. Lumbar support
US4531779A (en) * 1983-01-24 1985-07-30 Namba Press Works Co., Ltd. Automotive seat with lumbar support
AU4709085A (en) * 1984-03-29 1987-03-12 Tachikawa Spring Co. Ltd. Lumbar support
US4564235A (en) * 1984-11-09 1986-01-14 Tachikawa Spring Co., Ltd. Lumbar support device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0407431A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994024904A1 (fr) * 1993-04-30 1994-11-10 Henderson's Industries Pty. Ltd. Support lombaire ajustable
US5788328A (en) * 1993-04-30 1998-08-04 Henderson's Industries Pty. Ltd. Lumbar support adjustment
US6254186B1 (en) 1996-09-05 2001-07-03 Henderson's Industries Pty Ltd Adjustable lumbar support

Also Published As

Publication number Publication date
KR900700043A (ko) 1990-08-11
EP0407431A4 (en) 1991-11-13
CA1298771C (fr) 1992-04-14
EP0407431A1 (fr) 1991-01-16
KR930010035B1 (ko) 1993-10-14

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