EP1634517A1 - Support structure for a seat and corresponding seat suspension arrangement - Google Patents

Support structure for a seat and corresponding seat suspension arrangement Download PDF

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Publication number
EP1634517A1
EP1634517A1 EP04021807A EP04021807A EP1634517A1 EP 1634517 A1 EP1634517 A1 EP 1634517A1 EP 04021807 A EP04021807 A EP 04021807A EP 04021807 A EP04021807 A EP 04021807A EP 1634517 A1 EP1634517 A1 EP 1634517A1
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EP
European Patent Office
Prior art keywords
lateral side
support structure
wires
wire
transverse
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.)
Withdrawn
Application number
EP04021807A
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German (de)
French (fr)
Inventor
Maxime Samain
Maarten Vanparys
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.)
Pullmaflex Benelux NV
Original Assignee
Pullmaflex Benelux NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pullmaflex Benelux NV filed Critical Pullmaflex Benelux NV
Priority to EP04021807A priority Critical patent/EP1634517A1/en
Publication of EP1634517A1 publication Critical patent/EP1634517A1/en
Withdrawn legal-status Critical Current

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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
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • 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
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/32—Seat parts with tensioned springs, e.g. of flat type with tensioned cords, e.g. of elastic type, in a flat plane

Definitions

  • the present invention relates to a support structure for a seat, in particular a support structure for incorporation in a seat frame, the support structure having a wire framework comprising two lateral side wires and a plurality of transverse wires extending between the two lateral side wires and providing load bearing support for upholstery of the seat.
  • Support structures of the aforementioned kind are very well known and may have various configurations determined by the design of a seat in which the support structure is to be mounted.
  • a support structure according to the prior art is known from GB 2 342 287 A.
  • the support structure disclosed in this prior art document comprises a wire framework having two lateral side wires suspendable in a seat frame and between which extend a plurality of transverse wires which provide load bearing support for upholstery of a seat.
  • the transverse wires are attached to the lateral side wires by being wound around the latter in the form of a helix with an end portion of the respective transverse wire extending substantially perpendicular to the respective lateral side wire.
  • Some of the transverse wires extend beyond the respective lateral side wire and terminate in free ends which can be formed as hook-like fingers for attachment to the seat frame.
  • the knot used for attaching a transverse wire to a lateral side wire in general has the shape of a helix with the end portion of the respective transverse wire being arranged substantially perpendicular to the direction of the respective lateral side wire, there is a significant risk of injury for an operator when manufacturing the support structure or for an operator at a customer side when modifying the support structure or assembling a seat suspension arrangement comprising the support structure.
  • there is a risk of injury when packaging or unpackaging the support structure, or when attaching something, e.g. the upholstery, foam, trim or other components, to the support structure.
  • the object underlying the present invention is to provide a support structure which avoids the risk of this kind of injuries.
  • the support structure of the present invention comprises a wire framework having two lateral side wires and a plurality of transverse wires extending between the two lateral side wires, the transverse wires providing load bearing support for upholstery of a seat. At least one of the transverse wires is attached to the side wires by being wound around the side wires such that an end portion thereof extends substantially parallel to the respective side wire. Consequently, this transverse wire is attached to the side wires by a new kind of a knot which allows to avoid any risk of injury for an operator when manufacturing the support structure or a seat suspension arrangement comprising a seat frame and such a support structure.
  • the support structure of the present invention may comprise at least one further transverse wire which is attached to the side wires by being wound around the latter such that it extends beyond the lateral side wires and terminates in end portions which may be used for attaching the support structure to a seat frame.
  • the end portions of this at least one further transverse wire may be formed in hook-like fingers for easily attaching the support structure to the seat frame.
  • the at least one further transverse wire may terminate in free ends that extend beyond the lateral side wires and can flex independently of one another relatively to a portion of the wire framework bounded by the two lateral side wires. In the latter case, the laterally extending free ends are unconnected and enable an effective adjustable lumbar support as the freely extending ends can provide laterally contoured support in a lumbar region without interfering with the arching of the two lateral side wires.
  • the transverse wires of the support structure may have different diameters.
  • Fig. 1 shows a support structure for incorporation in a seat frame, which may also be designated as a suspension mat or a pad.
  • the support structure is in particular adapted to provide support for upholstery of a respective seat, e.g. an automotive seat.
  • the support structure 2 comprises a pair of lateral side wires or side rails 4 which are interconnected by a plurality of transverse wires 5; 8 extending between the lateral side wires 4 and being anchored or attached to the lateral side wires 4 by being wound around the latter.
  • the wires 5, 8 have anchored portions 6, 9 angled in the plane of the support structure as illustrated, so that the support structure itself becomes extendable under loading placed upon the seat.
  • the transverse wires 5, 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 5, 8.
  • the diameter of the wires 8 differs from the diameter of the wires 5.
  • the wires 8 are of greater diameter than the wires 5 in order to provide a greater degree of stiffness. It may be recommendable to place the wires 8 having the greater diameter in a lumbar region of the support structure in order to provide a more stable and rigid support for the seat occupant in the lumbar region.
  • the support structure 2 may also use only wires 5, 8 having one and the same diameter or having more than two different diameters.
  • the wires designated by reference numeral 8 are anchored to the lateral side wires 4 by being wound around the latter and then extend beyond the lateral side wires to terminate in elongated end portions 10.
  • These elongated end portions 10 may serve to attach the support structure 2 to the seat frame (not shown in Fig. 1).
  • some or all of these elongated end portions 10 may be formed into hook-like fingers which can be used to easily attach the support structure 2 to the seat frame.
  • the hooks may extend both in the support plane of the support structure 2 and perpendicular thereto or in any other desired direction with respect to the support plane.
  • Some of the elongated end portions 10 extending beyond the lateral side wires 4 may also constitute free ends that can flex independently of one another relatively to a portion of the wire framework constituted by the wires 5, 8 and bounded by the lateral side wires 4. These free end portions are consequently unconnected and enable an effective adjustable lumbar support to be provided by arching of the two lateral side wires 4 under the action of a tension means, e.g. a Bowden cable arrangement, as the freely extending end portions 10 can provide laterally contoured support in the lumbar region without interfering with the arching of the two lateral side wires 4.
  • a tension means e.g. a Bowden cable arrangement
  • All the wires 5, 8 and the elongated end portions 10 extend in a plane generally parallel to the wire framework.
  • each hook may be individually angled. This in particular allows those elongated end portions 10, which are not connected to the seat frame, to conform best to the contour of the seat surface.
  • the respective elongated end portion 10 may be directly hooked into the seat frame or, alternatively, may be coupled to the seat frame by means of tension springs anchored between the seat frame and the respective elongated end portions 10.
  • the support structure shown in Fig. 1 can be used to provide non-adjustable lumbar support.
  • preferably means are provided for adjustably arching the lateral side wires 4 to enable horizontal adjustment of the lumbar support.
  • These means may in particular comprise a Bowden cable arrangement to be actuated by a manual or electric actuating mechanism, as e.g. disclosed in US 5,988,745 A.
  • transverse wires designated by reference numeral 8 extend beyond the lateral side wires 4
  • the transverse wires designated by reference numeral 5 do not extend beyond the lateral side wires 4 but are attached or affixed to the lateral side wires 4 by means of a knot.
  • the end portions of the transverse wires 5 are wound around the lateral side wires 4 such that the end portion 7 extends substantially parallel to the respective lateral side wire 4. This means that the end portion 7 of each transverse wire 5 does not extend from the wire framework beyond the respective lateral side wire 4, but lies substantially in the support plane of the wire framework and is somewhat hidden by the respective lateral side wire 4 and consequently does not constitute a source of danger for an injury for an operator.
  • Fig. 2 shows an enlarged view illustrating the different attachments of one transverse wire 5 and one transverse wire 8 to a lateral side wire 4 in accordance with the present invention.
  • the transverse wire 8 is merely wound around the lateral side wire 4 in a helix-manner and extends beyond the lateral side wire 4 to form an elongated end portion 10.
  • the transverse wire 5 is also wound around the lateral side wire 4, but is attached to the lateral side wire 4 by means of a particular knot of such a kind that the end portion 7 of the lateral side wire 5 extends substantially parallel to the lateral side wire 4 without extending beyond the lateral side wire 4.
  • the end portion 7 of the transverse wire 5 is first wound around the lateral side wire 4 and then extends from the bottom up (or vice versa) behind the remaining portion of the transverse wire 5 such that the end portion 7 extends substantially parallel to the lateral side wire 4.
  • the general direction of the end portion 7 is the same as that of the lateral side wire 4.
  • the support structure 2 of the present invention may also comprise only transverse wires of the kind designated by reference numeral 5.

Abstract

A support structure (2) for incorporation into a seat frame comprises a wire framework having two lateral side wires (4) and a plurality of transverse wires (5, 8) extending between the two lateral side wires (4). Some of the transverse wires are attached to the lateral side wires (4) by being wound around the latter in such a manner that an end portion (7) extends substantially parallel to the lateral side wires (4), while other ones of the transverse wires may be wound around the lateral side wires (4) and form elongated end portions (10) extending beyond the lateral side wires (4).

Description

  • The present invention relates to a support structure for a seat, in particular a support structure for incorporation in a seat frame, the support structure having a wire framework comprising two lateral side wires and a plurality of transverse wires extending between the two lateral side wires and providing load bearing support for upholstery of the seat.
  • Support structures of the aforementioned kind are very well known and may have various configurations determined by the design of a seat in which the support structure is to be mounted.
  • For example, a support structure according to the prior art is known from GB 2 342 287 A. The support structure disclosed in this prior art document comprises a wire framework having two lateral side wires suspendable in a seat frame and between which extend a plurality of transverse wires which provide load bearing support for upholstery of a seat. The transverse wires are attached to the lateral side wires by being wound around the latter in the form of a helix with an end portion of the respective transverse wire extending substantially perpendicular to the respective lateral side wire. Some of the transverse wires extend beyond the respective lateral side wire and terminate in free ends which can be formed as hook-like fingers for attachment to the seat frame.
  • Since the knot used for attaching a transverse wire to a lateral side wire according to this prior art document in general has the shape of a helix with the end portion of the respective transverse wire being arranged substantially perpendicular to the direction of the respective lateral side wire, there is a significant risk of injury for an operator when manufacturing the support structure or for an operator at a customer side when modifying the support structure or assembling a seat suspension arrangement comprising the support structure. In particular, there is a risk of injury when packaging or unpackaging the support structure, or when attaching something, e.g. the upholstery, foam, trim or other components, to the support structure.
  • Consequently, the object underlying the present invention is to provide a support structure which avoids the risk of this kind of injuries.
  • According to the present invention, this object is achieved by a support structure according to independent claim 1. The dependent claims define preferred and advantageous embodiments of the present invention.
  • The support structure of the present invention comprises a wire framework having two lateral side wires and a plurality of transverse wires extending between the two lateral side wires, the transverse wires providing load bearing support for upholstery of a seat. At least one of the transverse wires is attached to the side wires by being wound around the side wires such that an end portion thereof extends substantially parallel to the respective side wire. Consequently, this transverse wire is attached to the side wires by a new kind of a knot which allows to avoid any risk of injury for an operator when manufacturing the support structure or a seat suspension arrangement comprising a seat frame and such a support structure.
  • Furthermore, the support structure of the present invention may comprise at least one further transverse wire which is attached to the side wires by being wound around the latter such that it extends beyond the lateral side wires and terminates in end portions which may be used for attaching the support structure to a seat frame. In particular, the end portions of this at least one further transverse wire may be formed in hook-like fingers for easily attaching the support structure to the seat frame. Alternatively or in addition, the at least one further transverse wire may terminate in free ends that extend beyond the lateral side wires and can flex independently of one another relatively to a portion of the wire framework bounded by the two lateral side wires. In the latter case, the laterally extending free ends are unconnected and enable an effective adjustable lumbar support as the freely extending ends can provide laterally contoured support in a lumbar region without interfering with the arching of the two lateral side wires.
  • In general, the transverse wires of the support structure may have different diameters.
  • In the following, the present invention will be described in detail in conjunction with the drawings with reference to preferred embodiments.
    • Fig. 1 is a front view of a support structure in accordance with a preferred embodiment of the present invention, and
    • Fig. 2 is an enlarged view of two wires shown in Fig. 1 in order to illustrate the attachment of both wires to a lateral side wire of Fig. 1 in accordance with the present invention.
  • Fig. 1 shows a support structure for incorporation in a seat frame, which may also be designated as a suspension mat or a pad. The support structure is in particular adapted to provide support for upholstery of a respective seat, e.g. an automotive seat.
  • The support structure 2 comprises a pair of lateral side wires or side rails 4 which are interconnected by a plurality of transverse wires 5; 8 extending between the lateral side wires 4 and being anchored or attached to the lateral side wires 4 by being wound around the latter. In the embodiment of Fig. 1, the wires 5, 8 have anchored portions 6, 9 angled in the plane of the support structure as illustrated, so that the support structure itself becomes extendable under loading placed upon the seat. Furthermore, in the embodiment of Fig. 1, the transverse wires 5, 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 5, 8.
  • As shown in Fig. 1, the diameter of the wires 8 differs from the diameter of the wires 5. In particular, the wires 8 are of greater diameter than the wires 5 in order to provide a greater degree of stiffness. It may be recommendable to place the wires 8 having the greater diameter in a lumbar region of the support structure in order to provide a more stable and rigid support for the seat occupant in the lumbar region. However, the support structure 2 may also use only wires 5, 8 having one and the same diameter or having more than two different diameters.
  • The wires designated by reference numeral 8 are anchored to the lateral side wires 4 by being wound around the latter and then extend beyond the lateral side wires to terminate in elongated end portions 10. These elongated end portions 10 may serve to attach the support structure 2 to the seat frame (not shown in Fig. 1). In particular, as indicated in Fig. 1, some or all of these elongated end portions 10 may be formed into hook-like fingers which can be used to easily attach the support structure 2 to the seat frame. The hooks may extend both in the support plane of the support structure 2 and perpendicular thereto or in any other desired direction with respect to the support plane.
  • Some of the elongated end portions 10 extending beyond the lateral side wires 4 may also constitute free ends that can flex independently of one another relatively to a portion of the wire framework constituted by the wires 5, 8 and bounded by the lateral side wires 4. These free end portions are consequently unconnected and enable an effective adjustable lumbar support to be provided by arching of the two lateral side wires 4 under the action of a tension means, e.g. a Bowden cable arrangement, as the freely extending end portions 10 can provide laterally contoured support in the lumbar region without interfering with the arching of the two lateral side wires 4.
  • All the wires 5, 8 and the elongated end portions 10 extend in a plane generally parallel to the wire framework. In case the elongated end portions 10 are formed into hook-like fingers, each hook may be individually angled. This in particular allows those elongated end portions 10, which are not connected to the seat frame, to conform best to the contour of the seat surface.
  • In the case the elongated end portions 10 are used for attaching the support structure 2 to the seat frame, the respective elongated end portion 10 may be directly hooked into the seat frame or, alternatively, may be coupled to the seat frame by means of tension springs anchored between the seat frame and the respective elongated end portions 10.
  • The support structure shown in Fig. 1 can be used to provide non-adjustable lumbar support. However, as already indicated above, preferably means are provided for adjustably arching the lateral side wires 4 to enable horizontal adjustment of the lumbar support. These means may in particular comprise a Bowden cable arrangement to be actuated by a manual or electric actuating mechanism, as e.g. disclosed in US 5,988,745 A.
  • While the transverse wires designated by reference numeral 8 extend beyond the lateral side wires 4, the transverse wires designated by reference numeral 5 do not extend beyond the lateral side wires 4 but are attached or affixed to the lateral side wires 4 by means of a knot. In particular, the end portions of the transverse wires 5 are wound around the lateral side wires 4 such that the end portion 7 extends substantially parallel to the respective lateral side wire 4. This means that the end portion 7 of each transverse wire 5 does not extend from the wire framework beyond the respective lateral side wire 4, but lies substantially in the support plane of the wire framework and is somewhat hidden by the respective lateral side wire 4 and consequently does not constitute a source of danger for an injury for an operator.
  • Fig. 2 shows an enlarged view illustrating the different attachments of one transverse wire 5 and one transverse wire 8 to a lateral side wire 4 in accordance with the present invention.
  • It can be easily taken from Fig. 2 that the transverse wire 8 is merely wound around the lateral side wire 4 in a helix-manner and extends beyond the lateral side wire 4 to form an elongated end portion 10. On the other hand, the transverse wire 5 is also wound around the lateral side wire 4, but is attached to the lateral side wire 4 by means of a particular knot of such a kind that the end portion 7 of the lateral side wire 5 extends substantially parallel to the lateral side wire 4 without extending beyond the lateral side wire 4. In particular, the end portion 7 of the transverse wire 5 is first wound around the lateral side wire 4 and then extends from the bottom up (or vice versa) behind the remaining portion of the transverse wire 5 such that the end portion 7 extends substantially parallel to the lateral side wire 4. In particular, since the end portion 7 substantially extends from the bottom up, the general direction of the end portion 7 is the same as that of the lateral side wire 4.
  • While the present invention has been described in conjunction with Fig. 1 and Fig. 2 with reference to a support structure comprising two different kinds of transverse wires, namely the transverse wires 5 being attached to the lateral side wires by means of end portions 7 extending substantially parallel to the lateral side wires 4 and the transverse wires 8 being wound around the lateral side wires 4 and extending beyond the lateral side wires 4 with the elongated end portions 10, the support structure 2 of the present invention may also comprise only transverse wires of the kind designated by reference numeral 5. However, it is advantageous to use both different kinds of wires in combination in order to provide, on the one hand, sufficient elasticity to the support structure 2 by means of the transverse wires 5 and, on the other hand, attachment means or an improved lateral contoured support and stiffness by means of the transverse wires 8 extending in the elongated end portions 10.

Claims (11)

  1. A support structure (2) for a seat, comprising
    two lateral side wires (4), and
    a plurality of transverse wires (5, 8) extending between the two lateral side wires (4), at least one transverse wire (5) of said plurality of transverse wires being attached to the lateral side wires (4) by being wound around the lateral side wires (4),
    characterized in that
    said at least one transverse wire (5) is attached to said lateral side wires (4) by being wound around the lateral side wires (4) such that an end portion (7) of said at least one transverse wire (5) extends substantially parallel to the respective lateral side wire (4).
  2. A support structure according to claim 1,
    characterized in that
    at least one further transverse wire (8) of said plurality of transverse wires extends laterally beyond the lateral side wires (4) after having been wound around the lateral side wires (4) and forms an elongated end portion (10).
  3. A support structure according to claim 2,
    characterized in that
    said elongated end portion (10) of said at least one further transverse wire (8) extends substantially parallel to or in a support plane defined by said support structure.
  4. A support structure according to claim 2 or claim 3,
    characterized in that
    a wire diameter of said at least one further transverse wire (8) is greater than a wire diameter of said at least one transverse wire (5).
  5. A support structure according to any one of claims 2-4,
    characterized in that
    said at least one further transverse wire (8) comprises at least one angled wire portion (9) between said two lateral side wires (4).
  6. A support structure according to any one of claims 2-5,
    characterized in that
    the elongated end portion (10) of said at least one further transverse wire (8) is adapted for attaching the support structure (2) to a seat frame.
  7. A support structure according to any one of claims 2-6,
    characterized in that
    said elongated end portion (10) of said at least one further transverse wire (8) is formed into a hook-like finger.
  8. A support structure according to any one of the preceding claims,
    characterized in that
    said at least one transverse wire (5) comprises at least one angled wire portion (6) between said two lateral side wires (4).
  9. A support structure according to any one of the preceding claims,
    characterized in that
    said end portion (7) of said at least one transverse wire (5) extends, after having been wound around the respective lateral side wire (4), substantially parallel to the respective lateral side wire (4) behind said transverse wire (5).
  10. A support structure according to any one of the preceding claims,
    characterized in that
    said support structure (2) is adapted to provide support for upholstery of the seat.
  11. A seat suspension arrangement, comprising
    a seat frame, and
    a support structure (2) according to any one of the preceding claims, said support structure (2) being suspended in said seat frame.
EP04021807A 2004-09-14 2004-09-14 Support structure for a seat and corresponding seat suspension arrangement Withdrawn EP1634517A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04021807A EP1634517A1 (en) 2004-09-14 2004-09-14 Support structure for a seat and corresponding seat suspension arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04021807A EP1634517A1 (en) 2004-09-14 2004-09-14 Support structure for a seat and corresponding seat suspension arrangement

Publications (1)

Publication Number Publication Date
EP1634517A1 true EP1634517A1 (en) 2006-03-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04021807A Withdrawn EP1634517A1 (en) 2004-09-14 2004-09-14 Support structure for a seat and corresponding seat suspension arrangement

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EP (1) EP1634517A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014206455A1 (en) 2013-06-26 2014-12-31 L&P Swiss Holding Ag Method of producing a lumbar support and lumbar support

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1545025A (en) * 1966-11-23 1968-11-08 Flex O Lators Padding forming elastic support for upholstered seats
US4171125A (en) * 1977-04-04 1979-10-16 Youngflex S.A. Spring panel for seat cushion support structure
US5911477A (en) * 1997-05-29 1999-06-15 L&P Property Management Company Lumbar support structure for automotive vehicle
US5988745A (en) 1996-01-05 1999-11-23 Youngflex Ag Support structures for incorporation in a seat frame
GB2342287A (en) 1998-10-02 2000-04-12 Youngflex Ag Improvements in or relating to seat suspension arrangements
US6357826B1 (en) * 1998-06-15 2002-03-19 Fico Cables, S.A. Height adjustable spine support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1545025A (en) * 1966-11-23 1968-11-08 Flex O Lators Padding forming elastic support for upholstered seats
US4171125A (en) * 1977-04-04 1979-10-16 Youngflex S.A. Spring panel for seat cushion support structure
US5988745A (en) 1996-01-05 1999-11-23 Youngflex Ag Support structures for incorporation in a seat frame
US5911477A (en) * 1997-05-29 1999-06-15 L&P Property Management Company Lumbar support structure for automotive vehicle
US6357826B1 (en) * 1998-06-15 2002-03-19 Fico Cables, S.A. Height adjustable spine support
GB2342287A (en) 1998-10-02 2000-04-12 Youngflex Ag Improvements in or relating to seat suspension arrangements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014206455A1 (en) 2013-06-26 2014-12-31 L&P Swiss Holding Ag Method of producing a lumbar support and lumbar support

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