CA1298771C - Lumbar support waist band and mechanism therefor - Google Patents
Lumbar support waist band and mechanism thereforInfo
- Publication number
- CA1298771C CA1298771C CA000595281A CA595281A CA1298771C CA 1298771 C CA1298771 C CA 1298771C CA 000595281 A CA000595281 A CA 000595281A CA 595281 A CA595281 A CA 595281A CA 1298771 C CA1298771 C CA 1298771C
- Authority
- CA
- Canada
- Prior art keywords
- fixed bracket
- rocking member
- rocking
- bracket
- lumbar support
- 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
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
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- 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
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
ABSTRACT
An adjustable bracket for a seat lumbar support is disclosed which includes 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.
An adjustable bracket for a seat lumbar support is disclosed which includes 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.
Description
LUMBAR SUPPORT WAIST BAND AND NECHANISM THEREFOR
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 ad~ustable 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.
One particular known support as described in Australian lapsed application No. 80449/82. The support comprises a ~waist band'l extending between tw,o brackets fixed within and on either side of the frame of a vehicle seat. On one side of the seat frame, 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 plate~ and fixed by appropriate means such as riveting.
On the other side of the seat frame the waist band is again pivotally attached to a bracket in a manner similar to that described above. The bracket however includes ad~ustment means to reduce or increase the distance between the ends of the waist band to enable the required ad~ustable 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 continuous or stepped cam is operated by an appropriate handle attached to a spindle to permit the desired ad~ustment.
, ~877 The known prior art lumbar supports are complicated and thus relatively expensive to manufacture. A lumbar support as is described in the above mentioned patent application requires many parts including the fixed bracke~t, pivot pin and bush, the waist band plate, the waist band, a further waist band plate 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.
In lumbar support devices as have been described above 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.
It is an object of this invention to provide a lumbar support apparatus and mechanism which avoids or reduces disadvantages of currently known and used lumbar support devices. It is an object of this invention to provide a lumbar support apparatus which utilized fewer parts and which is thus cheaper and simpler to manufacture and assemble. It is also an object of this invention to provide a one piece waist band for a lumbar support apparatus which is simple to manufacture and install.
The present invention provides an adjustable lumbar support for a seat having a first and a second side frame disposed one on either side of the seat which support comprises:
a first bracket adapted to be fixed to the first side frame of the seat;
a second bracket adapted to be fixed to the second side frame of the seat, said second bracket including a fixed bracket member and a rocking member; said fixed bracket member and said rocking member being pivotally attached to . ,, 12~8771 each other solely by means of inter-enqaging pivot members formed on said fixed bracket member and said rocking member; said pivotably attached rocking member being adapted to be moved smaothly or step wise through a number of intermediate positions between a first and second position by operation of adjustment means; said first bracket 0 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 to provide adjustable lumbar support.
The present invention also provides an ad~ustment bracket for a seat lumbar support which compri-~es an ad~ustable bracket for a seat lumbar support which comprisess a fixed bracket member and a rocking member pivotably attached to one another solely by means of inter-engaging pivot members formed on said fixed bracket member and said rocking member;
said pivotably attached rocking member being adapted to be moved smoothly or step wise through a number of intermediate positions between a first and second position by operation of ad~ustment means; said rocklng member including attachment means adapted to permanently or releasably engage with attachment means on a lumbar support waist band.
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1~8771 In order that the invention may be more readily understood, preferred forms of the invention will now be described with reference to the accompanying drawings in which:-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. 4; and 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.
Referring to the drawings there is shown an ad~ustable 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 i8 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 , ~ , .
1~8771 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 pro~ecting 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 ad~ustable) 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 i8 attached.
Referring to Fig. 3 there is shown a simple fixed bracket for attachment (by means not shown) to the opposite side frame of a seat to the ad~ustable bracket described above. The bracket 38 i9, 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 wait band appropriately dimensioned.
Referring to Figs. 4 and 5 there is shown another preferred embodiment of this invention. The figures shown partially in plan and cross section, a preferred form of waist band 41 constructed in accordance with the 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. Semi circular (cross section) 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 band to be increased and suitably supported or strengthened.
Referring to 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.
It sill ~e readily apparent from the foregoing that many modifications may be made to the device(s) described without departing from the scope of the invention. It will be readily apparent also that the invention relates to an improved ad~ustable bracket for a seat lumbar support, to a remote drive mechanism therefor and to a new construction of integrally formed waist belt either individually and/or in combination.
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 ad~ustable 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.
One particular known support as described in Australian lapsed application No. 80449/82. The support comprises a ~waist band'l extending between tw,o brackets fixed within and on either side of the frame of a vehicle seat. On one side of the seat frame, 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 plate~ and fixed by appropriate means such as riveting.
On the other side of the seat frame the waist band is again pivotally attached to a bracket in a manner similar to that described above. The bracket however includes ad~ustment means to reduce or increase the distance between the ends of the waist band to enable the required ad~ustable 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 continuous or stepped cam is operated by an appropriate handle attached to a spindle to permit the desired ad~ustment.
, ~877 The known prior art lumbar supports are complicated and thus relatively expensive to manufacture. A lumbar support as is described in the above mentioned patent application requires many parts including the fixed bracke~t, pivot pin and bush, the waist band plate, the waist band, a further waist band plate 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.
In lumbar support devices as have been described above 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.
It is an object of this invention to provide a lumbar support apparatus and mechanism which avoids or reduces disadvantages of currently known and used lumbar support devices. It is an object of this invention to provide a lumbar support apparatus which utilized fewer parts and which is thus cheaper and simpler to manufacture and assemble. It is also an object of this invention to provide a one piece waist band for a lumbar support apparatus which is simple to manufacture and install.
The present invention provides an adjustable lumbar support for a seat having a first and a second side frame disposed one on either side of the seat which support comprises:
a first bracket adapted to be fixed to the first side frame of the seat;
a second bracket adapted to be fixed to the second side frame of the seat, said second bracket including a fixed bracket member and a rocking member; said fixed bracket member and said rocking member being pivotally attached to . ,, 12~8771 each other solely by means of inter-enqaging pivot members formed on said fixed bracket member and said rocking member; said pivotably attached rocking member being adapted to be moved smaothly or step wise through a number of intermediate positions between a first and second position by operation of adjustment means; said first bracket 0 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 to provide adjustable lumbar support.
The present invention also provides an ad~ustment bracket for a seat lumbar support which compri-~es an ad~ustable bracket for a seat lumbar support which comprisess a fixed bracket member and a rocking member pivotably attached to one another solely by means of inter-engaging pivot members formed on said fixed bracket member and said rocking member;
said pivotably attached rocking member being adapted to be moved smoothly or step wise through a number of intermediate positions between a first and second position by operation of ad~ustment means; said rocklng member including attachment means adapted to permanently or releasably engage with attachment means on a lumbar support waist band.
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.
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1~8771 In order that the invention may be more readily understood, preferred forms of the invention will now be described with reference to the accompanying drawings in which:-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. 4; and 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.
Referring to the drawings there is shown an ad~ustable 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 i8 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 , ~ , .
1~8771 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 pro~ecting 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 ad~ustable) 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 i8 attached.
Referring to Fig. 3 there is shown a simple fixed bracket for attachment (by means not shown) to the opposite side frame of a seat to the ad~ustable bracket described above. The bracket 38 i9, 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 wait band appropriately dimensioned.
Referring to Figs. 4 and 5 there is shown another preferred embodiment of this invention. The figures shown partially in plan and cross section, a preferred form of waist band 41 constructed in accordance with the 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. Semi circular (cross section) 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 band to be increased and suitably supported or strengthened.
Referring to 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.
It sill ~e readily apparent from the foregoing that many modifications may be made to the device(s) described without departing from the scope of the invention. It will be readily apparent also that the invention relates to an improved ad~ustable bracket for a seat lumbar support, to a remote drive mechanism therefor and to a new construction of integrally formed waist belt either individually and/or in combination.
Claims (30)
1. An adjustable lumbar support for a seat having a first and a second side frame disposed one on either side of the seat which support comprises:
a first bracket adapted to be fixed to the first side frame of the seat;
a second bracket adapted to be fixed to the second side frame of the seat, said second bracket including a fixed bracket member and a rocking member; said fixed bracket member and said rocking member being pivotally attached to each other solely by means of inter-engaging pivot members formed on said fixed bracket member and said rocking member;
said pivotably attached rocking member being adapted to be moved smoothly or step wise through a number of 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 to provide adjustable lumbar support.
a first bracket adapted to be fixed to the first side frame of the seat;
a second bracket adapted to be fixed to the second side frame of the seat, said second bracket including a fixed bracket member and a rocking member; said fixed bracket member and said rocking member being pivotally attached to each other solely by means of inter-engaging pivot members formed on said fixed bracket member and said rocking member;
said pivotably attached rocking member being adapted to be moved smoothly or step wise through a number of 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 to provide adjustable lumbar support.
2. A lumbar support as claimed in Claim 1 in which the fixed bracket member and the rocking member are pivotably attached by means of deformable projections integrally formed on the fixed bracket member which pivotably engage with co-operating holes in the rocking member.
3. A lumbar support as claimed in Claim 1 or 2 in which said adjustment means comprises cam means disposed on or in the fixed bracket member and a cam following means integrally formed on the rocking member.
4. A lumbar support as claimed in Claims 1 or 2 wherein the waist band is integrally formed in one piece with attachment means adapted to releasably engage with the attachment means of the first bracket and the attachment means on the rocking member of the second bracket.
5. A lumbar support as claimed in Claim 1 in which the fixed bracket member includes forward, lower and rear sections integrally formed from a metal plate formed in a substantially cross-sectional U shape, said rear section including upwardly extending locating means; and in which the rocking member includes integrally formed upper plate and side plate sections, said upper plate section including orifices adapted to receive and co-operate with the upwardly extending locating means of the fixed bracket member to permit relative rocking movement between said fixed bracket member and said rocking member on operation of the adjustment means.
6. A lumbar support as claimed in Claim 5 in which the locating means comprise upwardly extending tabs or lugs integrally formed on the rear section of the fixed bracket member.
7. A lumbar support as claimed in Claim 6 in which the tabs or lugs also serve to hold the fixed bracket member and the rocking member together when assembled.
8. A lumbar support as claimed in Claim 7 wherein the holding of the fixed bracket member and the rocking member is accomplished by deformation or bending of the tabs or lugs.
9. An adjustable bracket for a seat lumbar support which comprises:
a fixed bracket member and a rocking member pivotably attached to one another solely by means .
of inter-engaging pivot members formed on said fixed bracket member and said rocking member; said pivotably attached rocking member being adapted to be moved smoothly or step wise through a number of intermediate positions between a first and second position by operation of adjustment means; said rocking member including attachment means adapted to permanently or releasably engage with attachment means on a lumbar support waist band.
a fixed bracket member and a rocking member pivotably attached to one another solely by means .
of inter-engaging pivot members formed on said fixed bracket member and said rocking member; said pivotably attached rocking member being adapted to be moved smoothly or step wise through a number of intermediate positions between a first and second position by operation of adjustment means; said rocking member including attachment means adapted to permanently or releasably engage with attachment means on a lumbar support waist band.
10. A bracket as claimed in Claim 9 in which the fixed bracket member and the rocking member are pivotably attached by means of deformable projections integrally formed on the fixed bracket member which pivotably engage with co-operating holes in the rocking member.
11. A bracket as claimed in Claim 9 in which said adjustment means comprises cam means disposed on or in the fixed bracket member and a cam following means integrally formed on the rocking member.
12. A bracket as claimed in Claim 11 in which the fixed bracket member includes forward, lower and rear sections integrally formed from a metal plate formed in a substantially cross-sectional U shape, said rear section including upwardly extending locating means; and in which the rocking member includes integrally formed upper plate and side plate sections, said upper plate section including orifices adapted to receive and co-operate with the upwardly extending locating means of the fixed bracket member to permit relative rocking movement between said fixed bracket member and said rocking member on operation of the adjustment means.
13. A bracket as claimed in Claim 12 in which the locating means comprise upwardly extending tabs or lugs integrally formed on the rear section of the fixed bracket member.
14. A bracket as claimed in Claim 13 in which the tabs or lugs also serve to hold the fixed bracket member and the rocking member together when assembled.
15. A bracket as claimed in Claim 14 wherein the holding of the fixed bracket member and the rocking member is accomplished by deformation or bending of the tabs or lugs .
16. An adjustable lumbar support for a seat having a first and a second side frame disposed one on either side of the seat which support comprises:
a first bracket adapted to be fixed to the first side frame of the seat;
a second bracket adapted to be fixed to the second side frame of the seat, said second bracket including a fixed bracket member and a rocking member; said fixed bracket member and said rocking member being attached to each other solely by means of inter-engaging members formed on said fixed bracket member and said rocking member; said rocking member being adapted to pivot smoothly or step wise through a number of 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 to provide adjustable lumbar support.
a first bracket adapted to be fixed to the first side frame of the seat;
a second bracket adapted to be fixed to the second side frame of the seat, said second bracket including a fixed bracket member and a rocking member; said fixed bracket member and said rocking member being attached to each other solely by means of inter-engaging members formed on said fixed bracket member and said rocking member; said rocking member being adapted to pivot smoothly or step wise through a number of 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 to provide adjustable lumbar support.
17. A lumbar support as claimed in claim 16 in which the fixed bracket member and the rocking member are pivotably attached by means of deformable projections integrally formed on the fixed bracket member which pivotably engage with cooperating holes in the rocking member.
18. A lumbar support as claimed in claim 16 or 17 in which said adjustment means comprises cam means disposed on or in the fixed bracket member and a cam following means integrally formed on the rocking member.
19. A lumbar support as claimed in claim 16 or 17 wherein the waist band is integrally formed in one piece with attachment means adapted to releasably engage with the attachment means or the first bracket and the attachment means on the rocking member of the second bracket.
20. A lumbar support as claimed in claim 16 in which the fixed bracket member includes forward, lower and rear sections integrally formed from a metal plate formed in a substantially cross-sectional U shape, said rear section including upwardly extending locating means; and in which the rocking member includes integrally formed upper plate and side plate sections, said upper plate section including orifices adapted to receive and co-operate with the upwardly extending locating means of the fixed bracket member to permit relative rocking movement between said fixed bracket member and said rocking member on operation of the adjustment means.
21. A lumbar support as claimed in claim 20 in which the locating means comprise upwardly extending tabs or lugs integrally formed on the rear section of the fixed bracket member.
22. A lumbar support as claimed in claim 21 in which the tabs or lugs also serve to hold the fixed bracket member and the rocking member together when assembled.
23. A lumbar support as claimed in claim 22 wherein the holding of the fixed bracket member and the rocking member is accomplished by deformation or bending of the tabs or lugs.
24. An adjustable bracket for a seat lumbar support which comprises:
a fixed bracket member and a rocking member attached to one another solely by means of inter-engaging members formed on said fixed bracket member and said rocking member; said rocking member being adapted to pivot smoothly or step wise through a number of intermediate positions between a first and second position by operation of adjustment means; said rocking member including attachment means adapted to permanently or releasably engage with attachment means on a lumbar support waist band.
a fixed bracket member and a rocking member attached to one another solely by means of inter-engaging members formed on said fixed bracket member and said rocking member; said rocking member being adapted to pivot smoothly or step wise through a number of intermediate positions between a first and second position by operation of adjustment means; said rocking member including attachment means adapted to permanently or releasably engage with attachment means on a lumbar support waist band.
25. A bracket as claimed in claim 24 in which the fixed bracket member and the rocking member are pivotably attached by means of deformable projections integrally formed on the fixed bracket member which pivotably engage with co-operating holes in the rocking member.
26. A bracket as claimed in claim 24 in which said adjustment means comprises cam means disposed on or in the fixed bracket member and a cam following means integrally formed on the rocking member.
27. A bracket as claimed in claim 26 in which the fixed bracket member includes forward, lower and rear sections integrally formed from a metal plate formed in a substantially cross-sectional U shape, said rear section including upwardly extending locating means; and in which the rocking member includes integrally formed upper plate and side plate sections, said upper plate section including orifices adapted to receive and co-operate with the upwardly extending locating means of the fixed bracket member to permit relative rocking movement between said fixed bracket member and said rocking member on operation of the adjustment means.
28. A bracket as claimed in claim 27 in which the locating means comprise upwardly extending tabs or lugs integrally formed on the rear section of the fixed bracket member.
29. A bracket as claimed in claim 28 in which the tabs or lugs also serve to hold the fixed bracket member and the rocking member together when assembled.
30. A bracket as claimed in claim 29 wherein the holding of the fixed bracket member and the rocking member is accomplished by deformation or bending of the tabs or lugs.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPI7540 | 1988-03-31 | ||
| AUPI754088 | 1988-03-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1298771C true CA1298771C (en) | 1992-04-14 |
Family
ID=3772980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000595281A Expired - Lifetime CA1298771C (en) | 1988-03-31 | 1989-03-30 | Lumbar support waist band and mechanism therefor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0407431A4 (en) |
| KR (2) | KR930010035B1 (en) |
| CA (1) | CA1298771C (en) |
| WO (1) | WO1989009005A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4492573T1 (en) * | 1993-04-30 | 1996-08-22 | Henderson S Instustries Pty Lt | Lumbar support adjustment device |
| AUPO213496A0 (en) | 1996-09-05 | 1996-09-26 | Henderson's Industries Pty Ltd | Adjustable lumbar support |
Family Cites Families (7)
| 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 |
| GB2035792B (en) * | 1978-12-01 | 1982-11-24 | Chrysler Uk | Webbing for seats |
| 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 |
| JPS60207614A (en) * | 1984-03-29 | 1985-10-19 | 株式会社タチエス | Lamber support apparatus |
| US4564235A (en) * | 1984-11-09 | 1986-01-14 | Tachikawa Spring Co., Ltd. | Lumbar support device |
-
1989
- 1989-03-30 CA CA000595281A patent/CA1298771C/en not_active Expired - Lifetime
- 1989-03-30 KR KR1019890702224A patent/KR930010035B1/en active
- 1989-03-30 EP EP19890903980 patent/EP0407431A4/en not_active Withdrawn
- 1989-03-30 KR KR1019890702224A patent/KR900700043A/en active IP Right Grant
- 1989-03-30 WO PCT/AU1989/000137 patent/WO1989009005A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| KR930010035B1 (en) | 1993-10-14 |
| EP0407431A4 (en) | 1991-11-13 |
| WO1989009005A1 (en) | 1989-10-05 |
| KR900700043A (en) | 1990-08-11 |
| EP0407431A1 (en) | 1991-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |