EP2039270B1 - Lumbar Support - Google Patents

Lumbar Support Download PDF

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Publication number
EP2039270B1
EP2039270B1 EP20070116922 EP07116922A EP2039270B1 EP 2039270 B1 EP2039270 B1 EP 2039270B1 EP 20070116922 EP20070116922 EP 20070116922 EP 07116922 A EP07116922 A EP 07116922A EP 2039270 B1 EP2039270 B1 EP 2039270B1
Authority
EP
Grant status
Grant
Patent type
Prior art keywords
lumbar
nut
motor
arm member
spindle
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.)
Active
Application number
EP20070116922
Other languages
German (de)
French (fr)
Other versions
EP2039270A1 (en )
Inventor
Egidio Marcantoni
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.)
Ciar SpA
Original Assignee
Ciar SpA
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
Grant date
Family has litigation

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/46Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462Support 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
    • A47C7/465Support 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 by pulling an elastic cable

Description

  • The invention refers to a lumbar support for a seat backrest with a lumbar pad and a toggle linkage to adjust the position of the lumbar pad.
  • US 4,182,533 discloses a seat backrest having an upholstered cushion portion supported by a rigid frame portion including means to produce a desired supporting contour in the lumbar region of the seat occupant. The contour-producing means includes a lumbar pad resiliently biased pivoted arm members connecting the lumbar pad to the frame through a toggle linkage, and handle means operable from the side of the backrest for adjustably positioning the lumbar pad in a plurality of fixed positions forward of the frame.
  • DE-A1-29 35 352 relates to a seat backrest with a lumbar pad formed of a flexible plate which is adjustable by a motor with a spindle and a nut, wherein the motor rotates the spindle to move the nut along the spindle and wherein the nut is coupled to the lumbar pad via a rope or cable. A similar construction is known from DE-U1-299 12 855 .
  • EP-A1-1 566 119 discloses a lordosis support including a plate that is adapted to be curved, and an adjusting mechanism for adjusting the curvature of the plate wherein the plate is elastically biased into a curved position and the adjusting mechanism is adapted to reduce the curvature of the plate.
  • The object of the invention is to improve the adjustment of the lumbar support.
  • According to the invention, that object is achieved by the features of claim 1.
  • The lumbar support for a seat backrest according to the invention has a lumbar pad and a toggle linkage to adjust the position of the lumbar pad. Furthermore, it comprises a motor with a spindle and a nut, wherein the motor rotates the spindle to move the nut along the spindle and wherein the nut is coupled to the toggle linkage, which includes an arm member which is pivotably connected to a frame and bears the lumbar pad and a link coupled to the nut and the arm member.
  • The motor driven lumbar support allows an adjustment of the lumbar pad while the user is sitting in his normal position. In addition, the position of the lumbar pad is not limited to fixed positions.
  • Further embodiments of the invention are the subject matter of the subordinate claims.
  • In one embodiment of the invention, the lumbar support comprises a frame for supporting the motor with the spindle and provides a pivot point for the toggle linkage. Preferably, the link is coupled to the arm member in a middle region between the connection of the arm member to the frame and the connection of the lumber pad to the arm member.
  • Furthermore, the lumbar support has a control unit to move the lumbar pad by actuating the motor. According to a preferred embodiment of the invention, the control unit has a time setting device to set a time period for periodically activating the motor to move the nut in order to change the position of the lumbar pad. This function has a very positive influence on the spinal column because the sitting position of the user changes periodically.
  • Further advantages and embodiments of the invention will be explained by the following description and the drawings.
  • In the drawings
  • Fig. 1
    shows a side elevation of a seat furniture with a lumbar support,
    Fig. 2
    shows a three dimensional view of the seat frame and the lumbar support and
    Fig. 3a and 3b
    show a side elevation of the lumbar support in two different positions of the lumbar pad.
  • Fig. 1 discloses a seat furniture 1 with a seat backrest 2 having a lumbar support 3.
  • As can be seen in Figs. 2, 3a, and 3b, the lumbar support 3 has a frame 4 which is fixed to a backrest frame 5 of the seat backrest 2. The lumbar support 3 further comprises an actuator with a motor 6, a spindle 7, and a nut 8 wherein the motor rotates the spindle to move the nut along the spindle. Furthermore, the lumbar support has a toggle linkage 9 which comprises an arm member 9a which is pivotably connected to the frame 4 and a link 9b coupled to the nut 8 and the arm member 9a.
  • The arm member 9a is coupled to frame 4 at one end and bears a lumbar pad 10 at the other end. The link 9b is coupled to the arm member 9a in a middle region between the connection of the arm member to the frame 4 and the connection of the lumbar pad 10 to the arm member.
  • As can be seen from Figs. 3 and 3b, it is possible to change the position of the lumbar pad 10 by moving the nut 8 by rotation of the spindle 7. For actuating the motor 6 a control unit 11 is provided, which may be integrated in the seat furniture 1 (see Fig. 1). However, it is also possible to use a remote control or a control unit which is connected to the motor via a cable.
  • In a preferred embodiment of the invention, the control unit comprises a time setting device 11a to set a time period for periodically activating the motor to move the nut in order to change the position of the lumbar. Accordingly, it is possible to set a time period of, for instance, two minutes and as a consequence, the position of the lumbar pad will be changed every two minutes a little bit. This has the effect that the position of the user changes every two minutes which has a positive influence on the spinal column of the user.

Claims (5)

  1. Lumbar support (3) for a seat backrest (2) with a lumbar pad (10), a linkage (9) to adjust the position of the lumbar pad and
    a motor (6) with a spindle (7) and a nut (8), wherein the motor rotates the spindle to move the nut along the spindle and wherein the nut is coupled to the linkage,
    characterized in that the linkage is a toggle linkage (9) including an arm member (9a) which is pivotably connected to a frame (4) and bears the lumbar pad (10) and a link (9b) coupled to the nut (8) and the arm member (9a).
  2. Lumbar support according to claim 1, characterized by a frame (4) for supporting the motor (6) with the spindle (7) and for providing a pivot point for the toggle linkage (9).
  3. Lumbar support according to claim 1, characterized in that the link (9b) is coupled to the arm member (9a) in a middle region between the connection of the arm member (9a) to the frame (4) and the connection of the lumbar pad (10) to the arm member (9a).
  4. Lumbar support according to one or more of the preceding claims, characterized by a control unit (11) to move the lumbar pad (10) by actuating the motor (6).
  5. Lumbar support according to claim 4, characterized in that control unit (11) has a time setting device (11a) to set at time period for periodically activating the motor (6) to move the nut (8) in order to change the position of the lumbar pad (10).
EP20070116922 2007-09-21 2007-09-21 Lumbar Support Active EP2039270B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070116922 EP2039270B1 (en) 2007-09-21 2007-09-21 Lumbar Support

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE200760001694 DE602007001694D1 (en) 2007-09-21 2007-09-21 lumbar support
EP20070116922 EP2039270B1 (en) 2007-09-21 2007-09-21 Lumbar Support
ES07116922T ES2327791T3 (en) 2007-09-21 2007-09-21 lumbar support.
US12231585 US20090079245A1 (en) 2007-09-21 2008-09-04 Lumbar support
CN 200820135281 CN201286500Y (en) 2007-09-21 2008-09-12 Waist supporting piece

Publications (2)

Publication Number Publication Date
EP2039270A1 true EP2039270A1 (en) 2009-03-25
EP2039270B1 true EP2039270B1 (en) 2009-07-22

Family

ID=38984459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070116922 Active EP2039270B1 (en) 2007-09-21 2007-09-21 Lumbar Support

Country Status (5)

Country Link
US (1) US20090079245A1 (en)
EP (1) EP2039270B1 (en)
CN (1) CN201286500Y (en)
DE (1) DE602007001694D1 (en)
ES (1) ES2327791T3 (en)

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JP4925176B2 (en) * 2006-07-07 2012-04-25 テイ・エス テック株式会社 Vehicle seat
US8991923B2 (en) 2009-11-16 2015-03-31 Schukra Geraetebau Gmbh Adjusting device for a lumbar support and method of adjusting a lumbar support
EP2471414B1 (en) * 2009-11-16 2013-09-18 Schukra Gerätebau GmbH Adjusting device for a lumbar support and method of adjusting a lumbar support
US8474909B2 (en) 2010-09-21 2013-07-02 La-Z-Boy Incorporated Power lift lumbar support system
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
US9193280B2 (en) 2012-09-13 2015-11-24 Leggett & Platt Canada Co. Lumbar support system
US20150272333A1 (en) * 2012-10-23 2015-10-01 Lear Corporation Thoracic region comfort seating system
EP3326492A1 (en) * 2016-08-30 2018-05-30 L&P Property Management Company Reversible headrest tilt, lumbar mechanism
US9949567B2 (en) 2014-09-26 2018-04-24 L&P Property Management Company Reversible headrest tilt, lumbar mechanism
CN104433454A (en) * 2014-12-09 2015-03-25 成都卓青科技有限公司 Chair
US9826841B2 (en) 2015-12-24 2017-11-28 L&P Property Management Company Chair back with adjustable lumbar support
US10085564B2 (en) 2016-02-02 2018-10-02 L & P Property Management Company Adjustable lumbar support for upholstery furniture
CN105853127B (en) * 2016-03-22 2018-01-19 中国人民解放军第三军医大学第附属医院 Intelligent Surgical chair
US9629469B1 (en) 2016-05-12 2017-04-25 Mary Watkins Lumbar support system

Family Cites Families (26)

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US2689601A (en) * 1954-03-19 1954-09-21 Philip D Fredenburgh Portable seat
US2821242A (en) * 1955-03-07 1958-01-28 John R Manegold Elevatable self-operated invalid chair
GB2035071A (en) * 1978-11-18 1980-06-18 Uop Inc Seat having a movable lumbar support
US4182533A (en) 1978-12-26 1980-01-08 Uop Inc. Seat backrest having an adjustable lumbar support
US4232901A (en) * 1979-10-12 1980-11-11 Harrington Elaine M Adjustable ottoman
US4339150A (en) * 1980-05-05 1982-07-13 Gmsr Ortho Enterprises, Inc. Back support construction
DE3324655C2 (en) * 1983-07-08 1985-05-15 Fa. Willibald Grammer, 8450 Amberg, De
US5240308A (en) * 1983-11-09 1993-08-31 Goldstein Glenn A Ergonomic adjustable chair and method
US4685731A (en) * 1985-10-28 1987-08-11 Migut Gary J Tank crew seat structure
US4657304A (en) * 1986-06-06 1987-04-14 Itt Corporation Adjustable headrest
US5088790A (en) * 1990-05-21 1992-02-18 Lear Seating Corporation Adjustable lumbar support mechanism for a vehicular seat
JPH0731727Y2 (en) * 1991-08-22 1995-07-26 ナイルス部品株式会社 Lumbar support apparatus
US5174629A (en) * 1991-11-19 1992-12-29 Tachi-S Co., Ltd. Lumbar support device
ES2064207B1 (en) * 1992-07-08 1997-11-16 Eurokeyton Sa Robot massage lounge chair.
US5466045A (en) * 1994-10-05 1995-11-14 Tachi-S Co., Ltd. Lumbar support device
US5553919A (en) * 1994-10-11 1996-09-10 Excellence Lumbar Corporation Scissor jack lumbar support
US5695248A (en) * 1996-07-03 1997-12-09 Bell; Dale A. Retrofit adjustable seat
US6095605A (en) * 1999-06-22 2000-08-01 Lai; Yu-Shan Backrest adjusting device
DE29912855U1 (en) 1999-07-22 1999-11-18 Bruchmann Klaus Switch unit and fuse plug with contact guide element
US7000986B2 (en) * 2001-09-28 2006-02-21 Ficosa North America Lumbar support apparatus
US6938955B2 (en) * 2001-10-11 2005-09-06 L&P Property Management Co. Power lumbar mechanism
US6676214B2 (en) * 2001-11-16 2004-01-13 L & P Property Management Company Method and apparatus for lumbar support with integrated actuator housing
DE20313925U1 (en) * 2003-09-04 2004-11-11 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg The backrest structure for a motor vehicle seat
DE202004002569U1 (en) 2004-02-19 2005-07-07 Schwarzbich, Jörg lumbar support
US7341310B1 (en) * 2005-06-24 2008-03-11 Betty Ross Office chair with automated height adjustment
US7448684B2 (en) * 2005-06-28 2008-11-11 Chen Hsing Enterprise Co., Ltd. Backrest adjustment device

Also Published As

Publication number Publication date Type
ES2327791T3 (en) 2009-11-03 grant
DE602007001694D1 (en) 2009-09-03 grant
EP2039270A1 (en) 2009-03-25 application
US20090079245A1 (en) 2009-03-26 application
CN201286500Y (en) 2009-08-12 grant

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