US20090174241A1 - Lumbar Support Device - Google Patents
Lumbar Support Device Download PDFInfo
- Publication number
- US20090174241A1 US20090174241A1 US11/814,485 US81448505A US2009174241A1 US 20090174241 A1 US20090174241 A1 US 20090174241A1 US 81448505 A US81448505 A US 81448505A US 2009174241 A1 US2009174241 A1 US 2009174241A1
- Authority
- US
- United States
- Prior art keywords
- connecting portion
- wire
- seat frame
- lateral side
- 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.)
- Abandoned
Links
Images
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
- 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
Definitions
- the present invention relates to a lumbar support device and, more specifically, to an adjustable lumbar support device for incorporation into a backrest of a seat, e. g. in a vehicle.
- a lumbar support device comprising a wire framework.
- the wire framework essentially consists of two lateral side wires and a plurality of transverse wires.
- a Bowden cable arrangement is used for adjusting the degree of lumbar support provided by the device.
- U-shaped transverse wires are connected to the lateral side wires and the ends of a region to be arched by means of the Bowden cable.
- the Bowden cable connects the two U-shaped transverse wires and is operable so as to pull them towards each other, thereby arching the wire framework along a longitudinal direction.
- the wire framework is connected to the seat frame at locations essentially corresponding to the longitudinal position of the U-shaped transverse wires.
- the lumbar support device of the present invention comprises a wire framework for incorporation into a seat frame.
- the wire framework has two lateral side wires and a plurality of transverse wires.
- An adjusting mechanism is provided for adjusting the degree of lumbar support provided by the lumbar support device.
- the wire framework which preferably is configured to support upholstery of a seat, can at least in part be displaced along a direction essentially perpendicular to a support plane of the lumbar support device.
- the adjusting mechanism comprises a first support means having a first connecting portion pivotably connected to one longitudinal side of the seat frame, a second connecting portion connected to one of the lateral side wires, and a third connecting portion for connecting to an actuating means, and a second support means having a first connecting portion pivotably connected to the other longitudinal side of the seat frame, a second connecting portion connected to the other of the lateral side wires, and a third connecting portion for connecting to the actuating means.
- the actuating means which preferably comprises a Bowden cable, is configured to move the third connecting portions of the first and second support means with respect to each other.
- the two support means are linked together by means of the actuating means.
- the support means which are pivotably mounted to the seat frame, will perform a pivoting motion.
- the pivoting motion of the support means at the same time results in a movement of the wire framework essentially perpendicular to its support plane or to the plane of the seat frame.
- the support means serve both for attaching the wire framework to the seat frame and for adjusting the position of the wire framework in a direction perpendicular to its support plane.
- the wire framework will be moved with respect to the seat frame as a whole.
- operation of the actuating means would result in an overall pivoting motion of the wire framework about a transverse axis (if the wire framework is attached to the seat frame at one end) or in an arching of the wire framework (if the wire framework is attached to the seat frame at both ends).
- the present invention provides in an efficient way a solution for attaching the wire framework to the seat frame and for adjusting the degree of lumbar support provided by the lumbar support device.
- the support means each essentially consist of a wire.
- the wire can be formed with different (bent) portions each having a specific direction. It is advantageous to provide the wire in such a manner that wire portions corresponding to the first, second, and/or third connecting portions are directed essentially in parallel to the longitudinal direction of the seat frame, i. e. in parallel to the lateral side wires.
- the pivotable connection of the support means to the respective longitudinal side of the seat frame can be accomplished in a very simple and efficient manner.
- the connections to the wire framework and to the actuating means at the second and third connecting portions, respectively can be configured to provide a rotational degree of freedom in a very simple and efficient manner.
- the first connecting portion can be supported in a tubular or semi-tubular extension of the seat frame.
- the second connecting portion can be connected to a lateral side wire of the wire framework by means of a clip enclosing both the second connecting portion and the respective lateral side wire.
- a rotational degree of freedom can be provided by configuring an attaching member for attaching the actuating means with a tubular or semi-tubular portion which is adapted to receive the third connecting portion of the support means.
- the support means are thus configured as a lever mechanism which allows for converting the action of the actuating means into the desired movement of the wire framework essentially perpendicular to a support plane.
- the wire of the support means is preferably coated with a plastic material.
- FIG. 1 is a perspective view illustrating a lumbar support device according to an embodiment of the present invention.
- FIGS. 2 a ) and b ) are transverse sectional views illustrating the operation of the lumbar support device shown in FIG. 1 .
- FIG. 1 is a perspective view illustrating an adjustable lumbar support device according to an embodiment of the invention.
- the lumbar support device comprises a wire framework having two lateral side wires 4 and a plurality of transverse wires 8 .
- the transverse wires 8 are connected to the lateral side wires 4 by being wound around the latter.
- the transverse wires 8 have angled portions extending in the plane of the wire framework, i. e. in a support plane.
- the angled portions which in the present embodiment form wire portions of an essentially trapezoidal shape, the wire framework becomes extendable under a load exerted on the seat in a direction perpendicular to its support plane.
- transverse wires 8 extend through a center cord 12 or tube of paper or synthetic plastic material which serves to maintain a pre-defined vertical spacing between the transverse wires 8 .
- the diameter of the transverse wires 8 differs from that of the lateral side wires 4 .
- the wire framework is attached to a seat frame (schematically illustrated by dashed lines) by means of a pair of support means 5 .
- a first support means 5 connects one longitudinal side of the seat frame with one of the lateral side wires 4
- a second support means 5 connects the other, e. g. opposite, longitudinal side of the seat frame with the other lateral side wire 4 .
- the support means 5 each essentially consist of a wire having substantially the same diameter as the lateral side wires.
- the wire is formed into different sections comprising:
- first connecting portion 5 a for pivotably connecting the support means to the respective longitudinal side of the seat frame
- a third connecting portion 5 c for connecting to an actuating means 10 essentially formed by a Bowden cable.
- the connecting portions 5 a , 5 b , 5 c are each provided as wire portions extending essentially in parallel to each other and to the lateral side wires 4 .
- the corresponding connections to the seat frame, to the wire framework and to the actuating means are in an effective manner provided with a rotational degree of freedom about an axis extending in the longitudinal direction, i. e. in parallel to the lateral side wires 4 .
- the first connecting portion 5 a is connected to the second connecting portion 5 b by means of an intermediate portion generally extending both in the transverse direction and in the direction perpendicular to the support plane.
- the dimensions of the intermediate portions are selected so as to achieve a suitable lever effect when moving the third connecting portions 5 c of the support means with respect to each other, thereby causing movement of the wire framework in a direction perpendicular to its support plane.
- the actuating means 10 comprises a Bowden cable which couples the third connecting portions 5 c of the two support means 5 with one another.
- the outer sheath of the Bowden cable is coupled to a first attaching member 11 which is pivotably connected to the third connecting portion 5 c of the first support means 5
- the inner cable or wire of the Bowden cable is connected to a second attaching member 12 , which is pivotably connected to the third connecting portion 5 c of the second support means 5 . Consequently, the third connecting portion 5 c of the first and second support means 5 can be pulled toward each other by means of the Bowden cable.
- the first connecting portion 5 a is coupled to the seat frame by means of a tubular or semi-tubular extension of the seat frame.
- the tubular or semi-tubular extension of the seat frame extends along the longitudinal direction and is configured to receive the first connecting portion 5 a of the support means.
- the inner diameter of the tubular or semi-tubular extension is equal to or slightly larger than the diameter of the first connecting portion 5 a.
- the support means 5 is coupled to the respective lateral side wire 4 by means of a clip 7 which encloses both the second connecting portion 5 b and the lateral side wire 4 .
- the first and second attaching members 11 , 12 are attached to the third connecting portions 5 c of the respective support members by means of a tubular or semi-tubular portion of the respective attaching member 11 , 12 , the tubular or semi-tubular portion being configured to receive the third connecting portion 5 c of the respective support means.
- the wires forming the first and second support means 5 are coated with a plastic material. Thereby, frictional contact between metallic surfaces can be avoided and spurious and disturbing noise generated when adjusting the lumbar support device or when exerting a load upon the lumbar support device can be minimized.
- the third connecting portions 5 c of the support means 5 are pulled toward each other.
- the support means 5 are each pivotably connected to the seat frame at their first connecting portions 5 a , pulling the third connecting portions 5 c toward each other results in a pivoting motion of the support means 5 about the rotational axis defined by the respective first connecting portion 5 a.
- the support means 5 are arranged and configured in such a manner that the first connecting portions 5 a of the support means define a first plane located in front of the wire framework.
- the second connecting portions are located in the plane of the wire framework, i. e. in the support plane, which is located behind the first plane.
- the third connecting portions are located in a second plane behind the support plane.
- the second connecting portions 5 b which are attached to the wire framework are moved in a direction essentially perpendicular to the support plane. Consequently, the wire framework as a whole can be moved in a direction perpendicular to the support plane by the action of the Bowden cable.
- the wire framework is moved as a whole by the action of the actuating means.
- additional coupling of the wire framework to the seat frame This can, for example, be accomplished at end portions 4 a , 4 b of the lateral side wires.
- actuating the actuating means 10 results in an arching of the wire framework along its longitudinal axis. Therefore, the above described adjusting mechanism can be used to implement different types of adjustment, including displacing the entire support plane, pivoting the support plane or arching the wire framework.
- FIGS. 2 a ) and b The operation of the lumbar support device of the present invention is further illustrated in the cross sectional views of FIGS. 2 a ) and b ).
- the seat frame is denoted by reference numeral 3 .
- FIG. 2 a shows the lumbar support device in a first state.
- the first connecting portions 5 a are situated in a first plane above or in front of the support plane (indicated by the position of the transverse wire denoted by 8 ).
- the third connecting portions 5 c are situated in a second plane located below or behind the support plane.
- the support means 5 are formed in such a manner that the third connecting portions 5 c are spaced from the wire framework by a sufficient distance so as to provide the necessary freedom of movement for the third connecting portions 5 to be moved toward the plane of the first connecting portions 5 a.
- FIG. 2 b shows a second state of the lumbar support device in which the third connecting portions 5 c of the support means 5 have been pulled closer together as compared to the state shown in FIG. 2 a ).
- pulling the third connecting portions 5 c closer together is accompanied by a pivoting motion of the support means 5 .
- a pivoting motion of the support means 5 at the same time moves the plane of the wire framework in a direction essentially perpendicular to the support plane. Consequently, the degree of lumbar support provided by the wire framework can be adjusted by means of the actuating means 10.
- the second connecting portions are not only moved in a direction perpendicular to the support plane, but also in a direction parallel thereto, as they generally move on a circular arc.
- the component of movement in parallel to the support plane is preferably reduced by configuring the support means 5 in such a manner that, in the typical range of operation, the second connecting portions 5 b are situated essentially in the plane of the first connecting portion 5 a or in proximity thereto. In this case, the component of movement of the second connecting portions 5 b in parallel to the support plane vanishes and the second connecting portions are moved essentially only perpendicular to the support plane.
- a slight movement of the second connecting portions 5 b in parallel to the support plane can be compensated by the flexibility of the wire framework.
- a slight arching of the wire framework in response to movement of the second connecting portions 5 b in parallel to the support plane may be desirable.
- the third connecting portions 5 c it is, however, advantageous to provide a relatively large distance to the plane of the first connecting portions 5 a .
- a larger range of adjustment is achieved, as the third connecting portions 5 c can travel a longer distance before they reach the plane of the first connecting portions 5 a.
- the shape of the support means 5 define the radial positions of the second and third connecting portions 5 b , 5 c with respect to the rotational axis formed by the first connecting portion 5 a .
- a relative angular position of the second and third connecting portions 5 b , 5 c is defined.
- the radial and relative angular positions may be selected and optimized according to the specific configuration of the lumbar support device and the desired range of adjustment.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Seats For Vehicles (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
- Paper (AREA)
- Massaging Devices (AREA)
- Surgical Instruments (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05002493.4 | 2005-02-07 | ||
EP05002493A EP1688065B1 (de) | 2005-02-07 | 2005-02-07 | Lordosenstützvorrichtung |
PCT/EP2005/013788 WO2006081864A1 (en) | 2005-02-07 | 2005-12-21 | Lumbar support device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090174241A1 true US20090174241A1 (en) | 2009-07-09 |
Family
ID=34933615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/814,485 Abandoned US20090174241A1 (en) | 2005-02-07 | 2005-12-21 | Lumbar Support Device |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090174241A1 (de) |
EP (1) | EP1688065B1 (de) |
CN (1) | CN101106920A (de) |
AT (1) | ATE413828T1 (de) |
DE (1) | DE602005010966D1 (de) |
PT (1) | PT1688065E (de) |
WO (1) | WO2006081864A1 (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090302653A1 (en) * | 2004-11-30 | 2009-12-10 | L&P Swiss Holding Company | Support Structure for a Seat |
US20100320816A1 (en) * | 2006-12-08 | 2010-12-23 | Johnson Controls Technology Company | Vehicle seat with lumbar support |
US20140070583A1 (en) * | 2012-09-13 | 2014-03-13 | Robert J. McMillen | Lumbar support system |
US20140125102A1 (en) * | 2012-09-13 | 2014-05-08 | Leggett & Platt Canada Co. | Lumbar support system |
US20150091345A1 (en) * | 2012-05-07 | 2015-04-02 | Johnson Controls Technology Company | Vehicle seat with a lumbar support |
US9193287B2 (en) | 2012-09-13 | 2015-11-24 | Leggett & Platt Canada Co. | Lumbar support system |
US9282825B1 (en) | 2015-01-07 | 2016-03-15 | Exemplis Llc | Lumbar support adjustment mechanisms |
US9511687B2 (en) | 2012-05-07 | 2016-12-06 | Johnson Controls Technology Company | Seat adjustment device for vertical adjustment of a vehicle seat |
US10632882B2 (en) | 2012-09-13 | 2020-04-28 | Leggett & Platt Canada Co. | Lumbar support system |
JP2023016667A (ja) * | 2021-07-23 | 2023-02-02 | デチャン シート カンパニー リミテッド-ドンタン | ランバーサポートアセンブリ |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4627661A (en) * | 1983-01-27 | 1986-12-09 | Be - Ge Stolindustri Ab | Chair back with adjustable lumbar support |
US5823620A (en) * | 1997-04-17 | 1998-10-20 | Lear Corporation | Vehicle seat having lumbar support |
US5988745A (en) * | 1996-01-05 | 1999-11-23 | Youngflex Ag | Support structures for incorporation in a seat frame |
US6152531A (en) * | 1996-08-23 | 2000-11-28 | Youngflex Ag | Seat suspension arrangement and adjustment mechanism therefore |
US6402246B1 (en) * | 2001-04-11 | 2002-06-11 | L&P Property Management | Simplified strap lumbar support device |
US6499803B2 (en) * | 2000-03-30 | 2002-12-31 | Aisin Seiki Kabushiki Kaisha | Lumbar support device |
US6557938B1 (en) * | 2000-09-18 | 2003-05-06 | L & P Property Management Company | Adjustable lumbar device |
US6601919B1 (en) * | 1998-10-02 | 2003-08-05 | Youngflex Ag | Seat suspension arrangements |
US6623076B2 (en) * | 1993-06-17 | 2003-09-23 | Schukra-Gerätebau AG | Adjustment apparatus for a resiliently flexible support element of a back rest |
US6755476B2 (en) * | 2001-11-29 | 2004-06-29 | Ts Tech Co., Ltd. | Tension structure of seat back |
US6994399B2 (en) * | 2001-11-28 | 2006-02-07 | L&P Swiss Holding Company | Seat back suspension arrangement |
US7252335B2 (en) * | 2004-03-12 | 2007-08-07 | L&P Property Management Company | Lumbar with flexwires in cross |
-
2005
- 2005-02-07 PT PT05002493T patent/PT1688065E/pt unknown
- 2005-02-07 DE DE602005010966T patent/DE602005010966D1/de active Active
- 2005-02-07 AT AT05002493T patent/ATE413828T1/de not_active IP Right Cessation
- 2005-02-07 EP EP05002493A patent/EP1688065B1/de not_active Not-in-force
- 2005-12-21 US US11/814,485 patent/US20090174241A1/en not_active Abandoned
- 2005-12-21 CN CNA2005800471456A patent/CN101106920A/zh active Pending
- 2005-12-21 WO PCT/EP2005/013788 patent/WO2006081864A1/en active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4627661A (en) * | 1983-01-27 | 1986-12-09 | Be - Ge Stolindustri Ab | Chair back with adjustable lumbar support |
US6623076B2 (en) * | 1993-06-17 | 2003-09-23 | Schukra-Gerätebau AG | Adjustment apparatus for a resiliently flexible support element of a back rest |
US5988745A (en) * | 1996-01-05 | 1999-11-23 | Youngflex Ag | Support structures for incorporation in a seat frame |
US6152531A (en) * | 1996-08-23 | 2000-11-28 | Youngflex Ag | Seat suspension arrangement and adjustment mechanism therefore |
US5823620A (en) * | 1997-04-17 | 1998-10-20 | Lear Corporation | Vehicle seat having lumbar support |
US6601919B1 (en) * | 1998-10-02 | 2003-08-05 | Youngflex Ag | Seat suspension arrangements |
US6499803B2 (en) * | 2000-03-30 | 2002-12-31 | Aisin Seiki Kabushiki Kaisha | Lumbar support device |
US6557938B1 (en) * | 2000-09-18 | 2003-05-06 | L & P Property Management Company | Adjustable lumbar device |
US6402246B1 (en) * | 2001-04-11 | 2002-06-11 | L&P Property Management | Simplified strap lumbar support device |
US6994399B2 (en) * | 2001-11-28 | 2006-02-07 | L&P Swiss Holding Company | Seat back suspension arrangement |
US6755476B2 (en) * | 2001-11-29 | 2004-06-29 | Ts Tech Co., Ltd. | Tension structure of seat back |
US7252335B2 (en) * | 2004-03-12 | 2007-08-07 | L&P Property Management Company | Lumbar with flexwires in cross |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090302653A1 (en) * | 2004-11-30 | 2009-12-10 | L&P Swiss Holding Company | Support Structure for a Seat |
US20100320816A1 (en) * | 2006-12-08 | 2010-12-23 | Johnson Controls Technology Company | Vehicle seat with lumbar support |
US9630530B2 (en) | 2012-05-07 | 2017-04-25 | Johnson Controls Technology Company | Longitudinal adjuster for a vehicle seat |
US9511688B2 (en) | 2012-05-07 | 2016-12-06 | Johnson Controls Technology Company | Seating part of a vehicle seat |
US20150091345A1 (en) * | 2012-05-07 | 2015-04-02 | Johnson Controls Technology Company | Vehicle seat with a lumbar support |
US9637030B2 (en) * | 2012-05-07 | 2017-05-02 | Johnson Controls Technology Company | Vehicle seat with a lumbar support |
US9573492B2 (en) | 2012-05-07 | 2017-02-21 | Johnson Controls Technolgy Company | Vehicle seat |
US9511687B2 (en) | 2012-05-07 | 2016-12-06 | Johnson Controls Technology Company | Seat adjustment device for vertical adjustment of a vehicle seat |
US9193287B2 (en) | 2012-09-13 | 2015-11-24 | Leggett & Platt Canada Co. | Lumbar support system |
US9199565B2 (en) * | 2012-09-13 | 2015-12-01 | Leggett & Platt Canada Co. | Lumbar support system |
US20140125102A1 (en) * | 2012-09-13 | 2014-05-08 | Leggett & Platt Canada Co. | Lumbar support system |
US20140070583A1 (en) * | 2012-09-13 | 2014-03-13 | Robert J. McMillen | Lumbar support system |
US9193280B2 (en) * | 2012-09-13 | 2015-11-24 | Leggett & Platt Canada Co. | Lumbar support system |
US9764670B2 (en) | 2012-09-13 | 2017-09-19 | Leggett & Platt Canada Co. | Lumbar support system |
US10632882B2 (en) | 2012-09-13 | 2020-04-28 | Leggett & Platt Canada Co. | Lumbar support system |
US9282825B1 (en) | 2015-01-07 | 2016-03-15 | Exemplis Llc | Lumbar support adjustment mechanisms |
JP2023016667A (ja) * | 2021-07-23 | 2023-02-02 | デチャン シート カンパニー リミテッド-ドンタン | ランバーサポートアセンブリ |
Also Published As
Publication number | Publication date |
---|---|
PT1688065E (pt) | 2008-12-26 |
CN101106920A (zh) | 2008-01-16 |
EP1688065B1 (de) | 2008-11-12 |
WO2006081864A1 (en) | 2006-08-10 |
EP1688065A1 (de) | 2006-08-09 |
DE602005010966D1 (de) | 2008-12-24 |
ATE413828T1 (de) | 2008-11-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: L&P SWISS HOLDING COMPANY, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PATTYN, JO;CATRY, PIERROT;REEL/FRAME:019739/0090 Effective date: 20070711 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |