WO2022235469A1 - Élément de meuble à mécanisme de réglage lombaire - Google Patents

Élément de meuble à mécanisme de réglage lombaire Download PDF

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Publication number
WO2022235469A1
WO2022235469A1 PCT/US2022/026563 US2022026563W WO2022235469A1 WO 2022235469 A1 WO2022235469 A1 WO 2022235469A1 US 2022026563 W US2022026563 W US 2022026563W WO 2022235469 A1 WO2022235469 A1 WO 2022235469A1
Authority
WO
WIPO (PCT)
Prior art keywords
rail
assembly
links
slider
support member
Prior art date
Application number
PCT/US2022/026563
Other languages
English (en)
Inventor
Brandon Bucholz
Alexander M. Hegedus
Larry P. Lapointe
Original Assignee
La-Z-Boy Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/313,272 external-priority patent/US11324324B2/en
Application filed by La-Z-Boy Incorporated filed Critical La-Z-Boy Incorporated
Priority to CA3218060A priority Critical patent/CA3218060A1/fr
Publication of WO2022235469A1 publication Critical patent/WO2022235469A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • the present disclosure relates to an adjustment mechanism, such as a lumbar adjustment mechanism for a seating or furniture assembly.
  • a furniture member may include an adjustable lumbar support that allows a user to adjust the amount of support that a seatback of the furniture member provides at a lumbar portion of the user’s back.
  • the present disclosure provides a lumbar adjustment assembly that is compact in size while still providing a sufficiently large range of motion.
  • the lumbar adjustment assembly of the present disclosure fits within a slimmer space within a seatback frame, which allows for a larger variety of aesthetic designs of the seatback without sacrificing functionality.
  • the lumbar adjustment assembly of the present disclosure provides appropriate support in a wider width seat, such as in an oversized armchair (or “chair and a half”), for example.
  • the present disclosure provides an assembly (e.g., a seating or furniture assembly) that may include a seat bottom, a seatback, and an adjustment assembly.
  • the seatback is disposed adjacent the seat bottom and includes a seatback frame.
  • the lumbar adjustment assembly may be mounted to the seatback frame and may include a rail, a threaded rod disposed within the rail, first slider block slidably engaging the rail, a second slider block slidably engaging the rail, a third slider block slidably engaging the rail, one or more lumbar pads, and a plurality of links connecting the lumbar pad to the first, second, and third slider blocks.
  • the threaded rod may include a first threaded section having threads with a first handedness and a second threaded section having threads with a second handedness that is opposite the first handedness.
  • the first and second slider blocks may threadably engage the first threaded section.
  • the third slider block may threadably engage the second threaded section.
  • the assembly includes a motor assembly attached to the rail and rotatably driving the threaded rod relative to the rail.
  • the links include a pair of first links, a pair of second links, and a pair of third links.
  • a first end of each of the first links is rotatably coupled to the first slider block, a second end of each of the first links is rotatably coupled to the lumbar pad, a first end of each of the second links is rotatably coupled to the second slider block, a second end of each of the second links is rotatably coupled to the lumbar pad, a first end of each of the third links is rotatably coupled to the third slider block, and a second end of each of the third links is rotatably coupled to the lumbar pad.
  • the second ends of the first links, the second ends of the second links, and the second ends of the third links are rotatably coupled to the lumbar pad at first, second, and third rotational axes, respectively.
  • the first, second, and third rotational axes may be spaced apart from each other and parallel to each other.
  • the lumbar pad moves in a direction perpendicular to directions in which the first, second, and third slider blocks move along the rail.
  • the lumbar pad moves away from the rail when the first and second slider blocks move toward the third slider block along the rail, and the lumbar pad moves toward from the rail when the first and second slider blocks move away from the third slider block along the rail.
  • the seatback frame includes a lower cross member, an upper cross member, a first lateral support member, and a second lateral support member.
  • a motor assembly of the adjustment assembly may be attached to the first lateral support member and the rail is attached to the second lateral support member.
  • each of the first, second, and third slider blocks includes a channel that slidably and non-rotatably receives the rail.
  • the threaded rod is a single, unitary body.
  • the present disclosure also provides an assembly (e.g., a seating or furniture assembly) that may include a frame, a motor assembly, a rail, a threaded rod, a first slider block, a second slider block, a third slider block, and a plurality of links.
  • the motor assembly may include a housing attached to the frame.
  • the rail may include a first end attached to the motor assembly and a second end attached to the frame.
  • the threaded rod may be coupled to the motor assembly and may be disposed within a channel of the rail.
  • the threaded rod may include a first threaded section having threads with a first handedness and a second threaded section having threads with a second handedness that is opposite the first handedness.
  • the first slider block may slidably engage the rail and may threadably engage the first threaded section.
  • the second slider block may slidably engage the rail and may threadably engage the first threaded section.
  • the third slider block may slidably engage the rail and may threadably engage the second threaded section.
  • the plurality of links may be rotatably coupled to the first, second, and third slider blocks.
  • the assembly includes a support member attached to the plurality of links.
  • the support member is a lumbar pad
  • the frame is a seatback frame
  • the seatback frame includes a lower cross member, an upper cross member, a first lateral support member, and a second lateral support member.
  • the housing of the motor assembly may be attached to the first lateral support member and the second end of the rail may be attached to the second lateral support member.
  • the links include a pair of first links, a pair of second links, and a pair of third links.
  • a first end of each of the first links is rotatably coupled to the first slider block, a second end of each of the first links is rotatably coupled to the support member, a first end of each of the second links is rotatably coupled to the second slider block, a second end of each of the second links is rotatably coupled to the support member, a first end of each of the third links is rotatably coupled to the third slider block, and a second end of each of the third links is rotatably coupled to the support member.
  • the second ends of the first, second, and third links are rotatably coupled to the support member at first, second, and third rotational axes, respectively.
  • the first, second, and third rotational axes may be spaced apart from each other and parallel to each other.
  • the support member moves in a direction perpendicular to directions in which the first, second, and third slider blocks move along the rail.
  • the support member moves away from the rail when the first and second slider blocks move toward the third slider block along the rail, and the support member moves toward from the rail when the first and second slider blocks move away from the third slider block along the rail.
  • each of the first, second, and third slider blocks includes a channel that slidably and non-rotatably receives the rail.
  • the threaded rod is a single, unitary body.
  • Figure 1 is a perspective view of a furniture member with a legrest mechanism in a retracted position
  • Figure 2 is a perspective view of the furniture member with the legrest mechanism in an extended position
  • Figure 3 is a front view of a seatback of the furniture member with upholstery and padding removed to show a lumbar adjustment assembly
  • Figure 4 is a perspective view of the seatback and lumbar adjustment assembly
  • Figure 5 is a perspective view of the lumbar adjustment assembly in a retracted position
  • Figure 6 is a top view of the seatback and lumbar adjustment assembly in the retracted position
  • Figure 7 is a perspective view of the lumbar adjustment assembly in an extended position
  • Figure 8 is a top view of the seatback and lumbar adjustment assembly in the extended position
  • Figure 9 is an exploded view of the lumbar adjustment assembly
  • Figure 10 is a cross-sectional view of the lumbar adjustment assembly.
  • Figure 11 is another cross-sectional view of the lumbar adjustment assembly.
  • Example embodiments will now be described more fully with reference to the accompanying drawings. [0042] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
  • first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as “first,” “second,” and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
  • Spatially relative terms such as “inner,” “outer,” “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the example term “below” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
  • a seating or furniture assembly 10 ( Figures 1 and 2) is provided that may include a seat bottom 12, a seatback 14, and a lumbar adjustment mechanism or assembly 16 ( Figures 3-11 ).
  • the seatback 14 may be movable relative to the seat bottom 12 between reclined and upright positions.
  • the seating or furniture assembly 10 may include a legrest assembly 18 that is movable relative to the seat bottom 12 between a retracted position ( Figure 1) and an extended position ( Figure 2).
  • the seatback 14 includes a lumbar support section 20 in which the lumbar adjustment assembly 16 is disposed.
  • the lumbar adjustment assembly 16 can be actuated to move the lumbar support section 20 of the seatback 14 in a lumbar extension direction A to increase occupant lumbar support or in a lumbar retraction direction B to decrease occupant lumbar support.
  • the lumbar adjustment assembly 16 is operable independently of any other mechanism (e.g. a seatback reclining mechanism, tilting mechanism, movable headrest mechanism, or the legrest assembly 18) of the furniture assembly 10.
  • the seatback 14 includes a seatback frame 22 (which, in Figures 1 and 2, is shown covered with padding and upholstery) that may have an upper cross member 24, a lower cross member 26 (i.e. , the end adjacent the seat bottom 12 when the seating or furniture assembly 10 is fully assembled), and first and second lateral support members 28, 29 extending between the upper and lower cross members 24, 26.
  • the lumbar adjustment assembly 16 may be mounted to the first and second lateral support members 28, 29.
  • the lumbar adjustment assembly 16 may be disposed between the upper and lower cross members 24, 26 at a location corresponding to the lumbar support section 20 ( Figures 1 and 2) of the seatback 14.
  • the lumbar adjustment assembly 16 may include a motor assembly 30, a rail 32, a threaded rod 34 (Figures 9-11), a first slider block 36, a second slider block 38, a third slider block 39, a pair of first links 40, a pair of second links 42, a pair of third links 43, and a support member (e.g., a lumbar pad) 44.
  • the motor assembly 30 may include a housing 46 and a motor 48.
  • the housing 46 may include one or more mounting projections 50 each having an aperture 52 ( Figure 5).
  • a connecting pin 54 ( Figure 3) may extend through the aperture(s) 52 and engage a mounting bracket 56 that is fixedly attached to the second lateral support member 29. It will be appreciated that the motor assembly 30 could be mounted to the seatback 14 in any suitable manner.
  • the motor 48 may be attached to and/or disposed at least partially within the housing 46.
  • the motor 48 may be operatively coupled (e.g., via one or more output shafts disposed in the motor housing 46 and, in some configurations, via gears and/or other couplings) to the threaded rod 34 such that operation of the motor 48 causes rotation of the threaded rod 34 about a longitudinal axis of the threaded rod 34.
  • operation of the motor 48 in a first direction causes the lumbar pad 44 to move relative to the seatback 14 in the lumbar extension direction A toward an extended position ( Figures 7 and 8), and operation of the motor 48 in a second direction causes the lumbar pad 44 to move relative to the seatback 14 in the lumbar retraction direction B toward a retracted position ( Figures 5 and 6).
  • the rail 32 may be an elongated member that defines an internal cavity 58 ( Figures 10 and 11 ) in which the threaded rod 34 is disposed.
  • One end of the rail 32 may be fixedly attached to the housing 46 and another end of the rail 32 may include or be attached to a mounting bracket 60.
  • the mounting bracket 60 may be fixedly attached to the first lateral support member 28.
  • the threaded rod 34 may be an elongated cylindrical rod that is coupled to the motor 48 and threadably engages the first, second and third slider blocks 36, 38, 39. As shown in Figures 9 and 11 , the threaded rod 34 may include a first threaded section 68 and a second threaded section 70.
  • the first threaded section 68 and the second threaded section 70 may have threads of opposite handedness.
  • the first threaded section 68 may have right-handed threads and the second threaded section 70 may have left-handed threads, or the first threaded section 68 may have left- handed threads and the second threaded section 70 may have right-handed threads.
  • the threaded rod 34 may include an intermediate section 72 ( Figures 9 and 11) disposed between the first and second threaded sections 68, 70.
  • the intermediate section 72 defines a transitional portion of the threaded rod 34 between the first and second threaded sections 68, 70. In some configurations, the intermediate section 72 may be unthreaded.
  • the first threaded section 68 may extend between the motor assembly 30 and the intermediate section 72 and may threadably engage the third slider block 39.
  • the second threaded section 70 may threadably engage the first and second slider blocks 36, 38 and may extend between the intermediate section 72 and the mounting bracket 60 attached to the second lateral support member 28.
  • the first, second and third slider blocks 36, 38, 39 may be similar or identical to each other and may each include a channel 74 that movably receives the rail 32. As shown in Figure 10, the channel 74 has a cross-sectional shape that substantially matches the outer cross-sectional shape of the rail 32. In this manner, the first, second and third slider blocks 36, 38, 39 can slide along the rail 32.
  • each of the first and second slider blocks 36, 38 may include a nut portion 76 that extends from a main body of the slider block 36, 38 into the channel 74 and threadably engages the threaded rod 34. That is, the nut portion 76 includes a threaded aperture through which the threaded rod 34 is threadably received.
  • the nut portions 76 of the first and second slider blocks 36, 38 threadably engage the first threaded section 68 of the threaded rod 34.
  • the nut portion 76 of the third slider block 39 threadably engages the second threaded section 70 of the threaded rod 34.
  • the nut portions 76 of the first and second slider blocks 36, 38 have different threaded handedness than the nut portion 76 of the third slider block 39 (i.e., the nut portions 76 of the first and second slider blocks 36, 38 have the same thread handedness as the first threaded section 68, and the nut portion 76 of the third slider block 39 has the same thread handedness as the second threaded section 70).
  • the rail 32 prevents the slider blocks 36, 38, 39 from rotating with the threaded rod 34 and allows the slider blocks 36, 38, 39 to slide along the rail 32 (in a direction along the longitudinal axis of the threaded rod 34) while the threaded rod 34 rotates relative to the rail 32.
  • first, second, and third links 40, 42, 43 may be similar or identical to each other. As shown in Figures 5 and 7, first ends of the first links 40 are rotatably connected to the first slider block 36 (e.g., via pins or protrusions 77) and second ends of the first links 40 are rotatably connected to the lumbar pad 44 (e.g., via pins or fasteners 78). First ends of the second links 42 are rotatably connected to the second slider block 38 (e.g., via pins or protrusions 77) and second ends of the second links 42 are rotatably connected to the lumbar pad 44 (e.g., via pins or fasteners 78).
  • First ends of the third links 43 are rotatably connected to the third slider block 39 (e.g., via pins or protrusions 77) and second ends of the third links 43 are rotatably connected to the lumbar pad 44 (e.g., via pins or fasteners 78).
  • the first, second, and third links 40, 42, 43 may be coupled to the lumbar pad 44 at first, second, and third rotational axes R1 , R2, R3, respectively.
  • the first, second, and third rotational axes R1 , R2, R3 are parallel to each other and spaced apart from each other.
  • the lumbar pad 44 may be a relatively rigid member and may have a contoured support surface 80 (Figure 5).
  • the support surface 80 may be in contact with and/or adjacent to the padding and upholstery that covers the seatback 14.
  • the lumbar adjustment assembly 16 may be positioned on the seatback frame 22 such that the support surface 80 corresponds to the lumbar support section 20 of the seatback 14 (i.e., the support surface 80 of the lumbar pad 44 supports the lumbar portion of a person’s back who is sitting in the seating or furniture assembly 10).
  • a user sitting in the seating or furniture assembly 10 can actuate the lumbar adjustment assembly 16 to adjust the position of the lumbar support section 20 of the seatback 14. Movement of the lumbar adjustment assembly 16 from the retracted position ( Figures 5 and 6) to the extended position ( Figures 7 and 8) causes the lumbar pad 44 to move in the lumbar extension direction A ( Figure 1); and movement of the lumbar adjustment assembly 16 from the extended position to the retracted position causes the lumbar pad 44 to move in the lumbar retraction direction B.
  • Movement of the lumbar pad 44 toward the extended position moves the lumbar support section 20 (e.g., padding and/or upholstery covering the lumbar support section 20 of the seatback 14) in the lumbar extension direction A; and movement of the lumbar pad 44 toward the retracted position allows the lumbar support section 20 (e.g., the padding and/or upholstery covering the lumbar support section 20) to move in the lumbar retraction direction B.
  • the lumbar support section 20 e.g., padding and/or upholstery covering the lumbar support section 20 of the seatback 14
  • the user may press a button (not shown) or other switch or control interface located on the side of the seating or furniture assembly 10 or on a remote control (not shown), for example, to operate the motor 48 to drive the threaded rod 34 in a first rotational direction relative to the rail 32.
  • a button not shown
  • other switch or control interface located on the side of the seating or furniture assembly 10 or on a remote control (not shown)
  • the motor 48 to drive the threaded rod 34 in a first rotational direction relative to the rail 32.
  • rotation of the threaded rod 34 in the first rotational direction causes the first and second slider blocks 36, 38 to move toward the third slider block 39 and the third slider block 39 to move toward the first and second slider blocks 36, 38.
  • the links 40, 42, 43 rotate relative to the slider blocks 36, 38, 39 and force the lumbar pad 44 to move linearly in the lumbar extension direction A (e.g., from the retracted position to the extended position) (see Figure 8).
  • the lumbar extension direction A may be perpendicular to the direction in which the slider blocks 36, 38, 39 move along the rail 32.
  • the links 40, 42, 43 could be configured such that the lumbar extension direction A extends at a non-perpendicular angle relative to the rail 32.
  • the user may press another button (not shown) on the side of the seating or furniture assembly 10 or on the remote control (not shown), for example, to operate the motor 48 to drive the threaded rod 34 in a second rotational direction (opposite the first rotational direction) relative to the rail 32.
  • Rotation of the threaded rod 34 in the second rotational direction causes the first and second slider blocks 36, 38 to move away from the third slider block 39 and the third slider block 39 to move away from the first and second slider blocks 36, 38.
  • the links 40, 42, 43 rotate relative to the slider blocks 36, 38, 39 and force the lumbar pad 44 to move linearly in the lumbar retraction direction B (see Figure 6).
  • the lumbar retraction direction B may be perpendicular to the direction in which the slider blocks 36, 38, 39 move along the rail 32.
  • the links 40, 42, 43 could be configured such that the lumbar retraction direction B extends at a non-perpendicular angle relative to the rail 32.
  • the slider blocks 36, 38, 39 are connected to the lumbar pad 44 via links 40, 42, 43 at three spaced-apart locations (i.e., at the first, second, and third rotational axes R1 , R2, R3) along a length of the lumbar pad 44.
  • This configuration provides adequate support for the lumbar pad 44 along the entire length of the lumbar pad 44 so that a load applied to the any point on the surface 80 of the lumbar pad 44 can be adequately supported so that undesired movement or deflection of the lumbar pad 44 is reduced or eliminated. This may be particularly beneficial for a lumbar adjustment assembly 16 mounted in a wide seat assembly 14.
  • the furniture assembly 10 shown in Figures 1 and 2 is an oversized or extra-wide chair (also known as a “chair-and-a-half”).
  • the three slider blocks 36, 38, 39 and three pairs of links 40, 42, 43 supporting the extra-wide lumbar pad 44 in an extra-wide chair (or in an extra-wide backrest assembly 14 in a sofa, for example) adequately supports the lumbar pad 44 and reduces or prevents undesired movement of deflection of the lumbar pad 44 when subjected to a load at or near opposing ends 90, 92 ( Figure 3) of the lumbar pad 44.
  • the assembly 10 is a chair (e.g., an oversized chair); however, the principles of the present disclosure are not limited to chairs. That is, the lumbar adjustment assembly 16 can be incorporated into a variety of types of seating or furniture assemblies including single or multiple person furniture members, sofas, sectional members, loveseats, vehicle seating, dental seating, medical seating, etc. Furthermore, in any given seating or furniture assembly, the lumbar adjustment assembly 16 may be one of a plurality of movable or adjustable portions of the seating or furniture assembly, or the lumbar adjustment assembly 16 could be the only movable or adjustable portion of the seating or furniture assembly.
  • the lumbar adjustment assembly 16 is described above as being driven by the motor assembly 30, in some configurations, the lumbar adjustment assembly 16 could be manually driven.
  • threaded rod 34 shown in the figures is a single, unitary body, in some configurations, the threaded rod 34 could be formed by welding or otherwise attaching two rods (one rod corresponding to each of the first and second threaded sections 68, 70) together.
  • the threads of the first and second threaded sections 68, 70 have the same pitch. In other configurations, the threads of the first threaded section 68 may have a different pitch than the threads of the second threaded section 70. The different pitches of the threads of the first and second threaded sections 68, 70 can allow the first and second slider blocks 36, 38 to move at a different speed than the third slider block 39.
  • the links 40, 42, 43 could be shaped, sized, oriented and connected to the slider blocks 36, 38, 39 and lumbar pad 44 in any desired manner to produce any desired movement of the lumbar pad 44 (or multiple lumbar pads). Furthermore, the threaded rod 34, slider blocks 36, 38, 39 and links 40, 42, 43 could be configured to move additional or alternative components of a seating or furniture assembly (i.e., instead of or in addition to the lumbar pad 44).
  • first and second slider blocks 36, 38 are described above as being engaged with the first threaded section 68 of the threaded rod 34 and the third slider block 39 is described above a being engaged with the second threaded section 70
  • two of the slider blocks 36, 38, 39 may be disposed on the second threaded section 70 and one of the blocks 36, 38, 39 could be on the first threaded section 68.
  • the assembly 16 could include only two slider blocks (e.g., one on each of the threaded sections 68, 70).
  • the assembly 16 could include four (or more) slider blocks (one or more slider blocks on the first threaded section 68 and one or more slider blocks on the second threaded section 70). Regardless of the number of slider blocks in the assembly 16, each slider block may be coupled to the lumbar pad 44 by one or more links (e.g., like links 40, 42, 43).
  • links e.g., like links 40, 42, 43.
  • the section of the threaded rod 34 that is adjacent to motor assembly 30 is referred to above and in the figures as “the second threaded section 70,” the section of the threaded rod 34 that is adjacent to motor assembly 30 could be termed “the first threaded section 68.”
  • the assembly 16 is described above as being a lumbar adjustment assembly 16, in some configurations, the assembly 16 could be a movable headrest assembly (e.g., where the support member 44 is a headrest support member), a movable footrest assembly, movable legrest assembly, or a movable armrest assembly, for example.
  • a movable headrest assembly e.g., where the support member 44 is a headrest support member
  • a movable footrest assembly e.g., where the support member 44 is a headrest support member
  • movable legrest assembly e.g., where the support member 44 is a headrest support member
  • a movable armrest assembly e.g., where the support member 44 is a headrest support member

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

Abstract

La présente invention concerne un ensemble siège ou meuble pouvant comprendre un fond de siège, un dossier et un ensemble de réglage lombaire. Le dossier est disposé de manière adjacente au fond de siège et comprend un cadre de dossier. L'ensemble de réglage lombaire peut être monté sur le cadre de dossier et peut comprendre un rail, une tige filetée disposée à l'intérieur du rail, un premier bloc coulissant venant en prise de manière coulissante avec le rail, un deuxième bloc coulissant venant en prise de manière coulissante avec le rail, un troisième bloc coulissant venant en prise avec le rail, un coussinet lombaire et une pluralité d'éléments de liaison reliant le coussinet lombaire aux premier, deuxième et troisième blocs coulissants. La tige filetée comprend une première section filetée ayant des filetages avec un premier sens de rotation et une seconde section filetée ayant des filetages avec un second sens de rotation qui est inverse au premier sens de rotation. Les premier et second blocs coulissants viennent en prise par filetage avec la première section filetée. Le troisième bloc coulissant vient en prise par filetage avec la seconde section filetée.
PCT/US2022/026563 2021-05-06 2022-04-27 Élément de meuble à mécanisme de réglage lombaire WO2022235469A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA3218060A CA3218060A1 (fr) 2021-05-06 2022-04-27 Element de meuble a mecanisme de reglage lombaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US17/313,272 US11324324B2 (en) 2018-11-05 2021-05-06 Furniture member having lumbar adjustment mechanism
US17/313,272 2021-05-06

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Publication Number Publication Date
WO2022235469A1 true WO2022235469A1 (fr) 2022-11-10

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030184139A1 (en) * 2002-03-29 2003-10-02 Sloan, Paul H. Adjustable lumbar support
WO2008070991A1 (fr) * 2006-12-11 2008-06-19 Schukra Of North America, Ltd. Système lombaire pour sièges climatisés
US20160288682A1 (en) * 2015-04-03 2016-10-06 Dae Chang Seat Co., Ltd. Lumbar support assembly
US10952535B2 (en) * 2018-11-05 2021-03-23 La-Z-Boy Incorporated Furniture member having lumbar adjustment mechanism
US20210251388A1 (en) * 2018-11-05 2021-08-19 La-Z-Boy Incorporated Furniture Member Having Lumbar Adjustment Mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030184139A1 (en) * 2002-03-29 2003-10-02 Sloan, Paul H. Adjustable lumbar support
WO2008070991A1 (fr) * 2006-12-11 2008-06-19 Schukra Of North America, Ltd. Système lombaire pour sièges climatisés
US20160288682A1 (en) * 2015-04-03 2016-10-06 Dae Chang Seat Co., Ltd. Lumbar support assembly
US10952535B2 (en) * 2018-11-05 2021-03-23 La-Z-Boy Incorporated Furniture member having lumbar adjustment mechanism
US20210251388A1 (en) * 2018-11-05 2021-08-19 La-Z-Boy Incorporated Furniture Member Having Lumbar Adjustment Mechanism

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CA3218060A1 (fr) 2022-11-10

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