EP2598000B1 - Siège avec dossier à pré-cintrage réglable - Google Patents

Siège avec dossier à pré-cintrage réglable Download PDF

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Publication number
EP2598000B1
EP2598000B1 EP11745478.5A EP11745478A EP2598000B1 EP 2598000 B1 EP2598000 B1 EP 2598000B1 EP 11745478 A EP11745478 A EP 11745478A EP 2598000 B1 EP2598000 B1 EP 2598000B1
Authority
EP
European Patent Office
Prior art keywords
backrest
seat
link
support
link chain
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
EP11745478.5A
Other languages
German (de)
English (en)
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EP2598000A1 (fr
Inventor
Harald Gerwig
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.)
Vitra AG
Original Assignee
Vitra Patente AG
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Filing date
Publication date
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Publication of EP2598000A1 publication Critical patent/EP2598000A1/fr
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Publication of EP2598000B1 publication Critical patent/EP2598000B1/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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • 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

Definitions

  • the present invention relates to a seat having a backrest adjustable in a pre-curved deformation.
  • the backrest has a backrest support with a link chain of a variety of interconnected linked links.
  • the invention relates to vehicle seats and chairs, including in the seat height adjustable office swivel chairs, wherein the inclination of the backrest follows a synchronous adjustment of the seat tilt.
  • a spring preferably a gas spring, arranged for adjusting the seat height between the chair base and the mechanism resting thereon.
  • the backrest attached to the mechanism assumes a successively pre-curved deformation against the effect of the load by the action of a load from a basically vertical zero position to a maximum rearward tilting position.
  • a seat in the back of transverse elastic zones are provided for flexibility in leaning in by a user.
  • the elastic zones are formed by transverse ribs bridged by film hinges. Between the transverse ribs are stopper elements, which collide at maximum allowable reverse bending.
  • the US 5,328,245 discloses a backrest having a multiplicity of elements which can be displaced horizontally relative to one another and which conform to the contour of a leaning user in the profile. After adjusting the profile for the individual user, the entirety of the elements can be locked.
  • the DE 10 2004 032 765 B4 is the problem of adjusting the backrest to the back profile of a user by a plurality of transversely across the flexible plastic back extending, superimposed chambers solved.
  • the chambers can be inflated to varying degrees with air, so that they deform differently flexible to adapt to the individual user back.
  • the DE 42 16 159 A1 has a chair for the subject, the backrest synchronously carries the seat in the rear area lowering in reverse inclination.
  • the backrest is at least twice, namely divided into an upper and a lower part, wherein the parts are hinged together via horizontal axes.
  • Behind the backrest an upwardly projecting support arm is present, from which extends in the pelvic area a hinged cross lever to the backrest and there is also articulated.
  • the backrest is tilted backwards, it is lowered completely and the seat lowers slightly at the front and at the rear at the same time. Due to the displacement between the backrest and the support arm of the cross lever gets more in a horizontal position and thus pushes the lower part of the backrest to the user.
  • the chair according to the DE 195 02 485 C2 has a base on a base, which runs from below the seat to half the height of the backrest.
  • Base and seat are connected by a hinged at its front region on both sides first lever.
  • a bow which can be displaced in a curved groove and which is articulated to the rear area of the seat via a second lever which is articulated to the bow.
  • From the upper end of the bracket extends with bilateral articulation, a third lever to the backrest.
  • the user exerts a load on the front seat area, which lowers with it and pulls the bar upwards via the second lever and consequently also moves the backrest upwards as well as towards the user. If the user shifts his weight to the rear seating area, the seatback is lowered synchronously downward with the lowering seat.
  • the chair according to the WO 2007/038879 A1 has a base placed on the base, a patch on the base mechanism, one on the Mechanics mounted seat and attached to the mechanics backrest.
  • the backrest has a backrest frame, which carries an elastically deformable backrest part with a back plate.
  • the back plate has a back part to which a head attachment is connected.
  • the backrest is pivotable about a first axis of rotation from a basically upright zero position to a rearwardly directed tilt position. The movements of the seat and backrest are synchronized with each other.
  • means for an opposite erection of the shoulder area as a transition zone of the back to the head and head attachment are provided. These means are essentially each one hinged between the back frame and the back plate on both sides support.
  • a backrest support which initially consists of two at the upper ends of V-shaped merging S-shaped flexible flexible webs.
  • the webs are subdivided into a plurality of sections connected by film hinges.
  • an opening is provided, and between the opposite openings in each case a pivotable in the vertical plane rigid rib is attached, which keeps the two webs at a distance.
  • a plurality of tension cables are clamped, which are each secured by the front track through an opening transverse to the rear track at a next higher rib.
  • the DE 10 2006 030 674 A1 has a particular for a seat backrest subject, which is adjustable in a pre-curved deformation.
  • the backrest has a backrest support with a link chain of a plurality of interlinked links.
  • a flexible actuator of a rigid length extends from an upper fixed point, which is positioned on one of the links in the upper region of the backrest support, along the backrest support to a lower fixed point.
  • Each link has a dog which engages the downward link.
  • the flexible actuator is held in a guide assigned to the backrest support, which begins near the upper fixed point and ends at a gap which is upstream of the lower fixed point.
  • Means for moving the actuator in the leadership and Vorrümmen the upper fixed point with associated member cause the adjustment of the backrest.
  • the driver of the upper fixed point associated member causes the movement of the next member in the pre-curved position.
  • the other drivers within the link chain each effect the adjustment of the coupled member in the pre-curved position.
  • the present invention seeks to propose a seat with perfected ergonomic function.
  • the backrest is in the back moving inclination position is located, the support of shoulder area and head of the user can be improved.
  • the seat can also be equipped with a so-called synchronous mechanism to effect tilt adjustment of the backrest adequate tilt adjustment of the seat, and fulfills the functions of an adjustable height in the office swivel chair.
  • the backrest designed for a seat is adjustable in a pre-curved deformation.
  • the backrest has a backrest support with a link chain of a variety of interconnected linked links.
  • a flexible actuator with a rigid length extends from an upper fixed point, which is provided on one of the links in the upper region of the backrest carrier, along the backrest support to a lower fixed point.
  • Each link has a dog which engages the link located below.
  • the flexible actuator is embedded in a guide provided on the backrest support, which extends from near the upper fixed point to a lower fixed point upstream space.
  • For adjusting the backrest means for moving the adjusting element in the guide and Vorrümmen the upper fixed point are provided with associated member.
  • the cam of the upper fixed point associated member, which engages in the disposed below, the next member is intended for moving this next member in the precurved position.
  • the other drivers within the link chain each serve to move the coupled member in the precurved position.
  • the actuator has the shape of a leaf spring, an elastic rod or a Bowden cable or a rope.
  • the extension rests with a wedge surface on the baffle element and moves when adjusting the backrest in the direction of tilting position on the bounce down.
  • the link chain closes at the top with a head member, in which the upper fixed point is provided and followed by a first chain link followed, the other chain links. At the lower last chain link is followed by a bridge member which is rigidly connected to the backrest connection or integrally formed with the backrest connection.
  • the link chain of the backrest support may be formed up to the shoulder area of the user or, extended in height, to over a head portion.
  • the movable links between the links of the link chain and preferably also between the lower last link and the bridge member are formed by hinges in the form of mutually positive elements or of film hinges.
  • the link chain is provided on the side facing away from the seat part with rear stoppers, which block a bending of the link chain and bridge member, facing away from the seat part, to the rear.
  • the link chain can be provided on the side facing the seat part with front stoppers, which block a pre-curved deformation against the load, facing the seat part, beyond a maximum amount defined addition.
  • the backrest connection is attached to the connectors.
  • the backrest connection is formed with two arms, and both arms have at the ends facing the connectors in each case a molded part, which is intended for attachment to the respective associated connector.
  • At least some members of the link chain and optionally also the bridge member are provided with padding supports which serve to support a pad provided on the backrest.
  • the cushion supports are fastened by means of connecting members on the respective member or extend integrally from the respective member.
  • the return spring - for adjusting the backrest in the zero position in the absence of stress - is an additional function of the control element and to reinforce the reset function of the control element, a separate tension element can be fixed to the backrest support.
  • the tension element is preferably fixed on the rear side facing away from the user of the backrest support between the head member and the bridge member.
  • the return spring is formed by the hinges between the links and / or by the additional function of the actuating element and / or the separate tension element.
  • a spring preferably a gas spring, arranged for adjusting the seat height.
  • the seat is designed as a swivel chair.
  • the base of the adapter assembly is attached to the bottom part of the mechanism or to an extending piston rod of the height gas spring.
  • the backrest support is provided on the side facing the user with a cushion, which has a lumbar area and may have a head portion at the top.
  • a height-adjustable support member is provided, and the head portion is slidable in height.
  • the illustrated seat in the form of an office swivel chair consists of the resting on the floor underframe 1, resting thereon mechanism 2, on which the seat part 3 is mounted, and a backrest 4, which includes a head section h in comfortable equipment and provided with a pad 49 is.
  • the undercarriage 1 typically has first a foot 10 - for example, a 5-star base - which rests on bottom elements 14, preferably rollers.
  • a vice versuent 12 is inserted vertically in a standpipe 11 centrally in the foot 10 , which carries the mechanism 2 .
  • the backrest 4 is structured in the backrest support 40 - here in a first variant - the upholstery support 48 and the pad 49 resting thereon .
  • the backrest support 40 comprises a link chain 41, the bridge member 42 attached thereto at the bottom , which is connected to the backrest connection 43 , as well as the actuator assembly 45 in a first variant.
  • the backrest connection 43 leads to the mechanism 2 zoom. As a swivel chair, this can be pivoted about a vertical axis of rotation generally by 360 ° and remains in the unloaded state in the zero position, which is enforced by the bias of the spring assembly in the mechanism 2 and limited by a stop in the forward inclination.
  • the fixed in principle fixed first axis of rotation D1 about the first axis of rotation D1 pivotable second axis of rotation D2 and the principle also fixed third axis of rotation D3 extend. Also visible first are the fourth axis of rotation D4 and the fifth axis of rotation D5, which run through the actuating arrangement 45 .
  • FIGS. 2A to 2D are identical to FIGS. 2A to 2D
  • the backrest 4 By the action of a load on the backrest 4 caused by a user, it can be completely moved into the maximally backward tilting position R max .
  • the seat part 3 follows from the previous zero slope S 0 in the maximum seat tilt S max .
  • the backrest 4 with the link chain 41 in the backrest support 40 deforms into a pre-curved deformation, so that the user leaning into the seat is supported in an upright position, in particular in his shoulder and head area, and his eyes are kept virtually horizontal.
  • a return spring not shown, is provided which causes the adjustment of the backrest 4 with the backrest support 40 in the zero position R 0 in the absence of stress.
  • the statements according to Figures 2A-2C are provided with the head part h , while in the execution according to FIG. 2D the link chain 41 is shortened and thus has no head section h .
  • the mechanism 2 is in itself from the patent publications WO 2005/120291 A1 and WO 2007/038879 A1 known and consists essentially of the bottom part 20, the seat carrier 21 and the connectors 22 positioned thereon Bottom part 20 is fixedly placed with its opening 200 on the upper end of the extendable piston rod, arranged in a standpipe 11 height gas spring 12 .
  • the two angle-shaped connectors 22 are articulated, which are articulated on the other hand on the second axis of rotation D2 in the bearing recesses 210 in the rear region of the pivotable seat support 21 .
  • the bottom part 20 and the seat support 21 are connected to each other on the third axis of rotation D3 .
  • an adjusting sleeve 25 in which an actuator rests which, when actuated, permits the adjustment of the so-called seat depth by the upholstered plate 30 mounted on the seat support 21 , which forms the underside of the seat 3 , from a Lock released and limited sliding is.
  • the usual height adjustment lever 26 is provided to release the piston rod of thenaturengasfeder 12 from the lock and thus start the seat part 3 .
  • the locking lever 27 serves to block the mechanism 2, so that the backrest 4 can not be moved from the vertical zero position into the tilting position R max .
  • a biasing lever 28 is provided, which serves to adjust the applied to the mechanism 2 , spring system, not shown, the force to be applied for the adjustment of the backrest 4 .
  • This sequence of figures illustrates the structural design of the complete backrest 4 with the entire backrest support 40 with link chain 41, bridge member 42, backrest connection 43, moldings 44 and actuator assembly 45 in the current zero position R 0 .
  • the linkage chain 41 which also comprises a head section h , begins at the top with a head link 410, which is connected to a first link 411 by means of a hinge 417 .
  • This first member 411 is followed by further links 411 linked by hinges 417 , wherein the lowermost member 411 is connected via a hinge 417 to the bridge member 42 which is immovable.
  • Each link 411 bears proportionately to an upper and a lower hinge 417 at.
  • the upper hinge 417 is used to connect with the arranged above the respective member 411, member 411 and head member 410, and the lower hinge 417 is used to connect with the below the respective member 411 disposed member 411 and bridge member 42.
  • a hinge 417 consists here of pins in the head member 410 and in the links 411 as well as pin holes in the links 411 and in the bridge member 42nd
  • a front stopper 413 is present, which limits the maximum possible vorgeneddle angular position between the links 410,411,42 .
  • the front stoppers 413 that belong to the head member 410 and the subsequent members 411 - namely, those members 410, 411 that move into the pre-curved deformation at the tilting position R max - there is an open gap to move the members 410, 411 toward each other to allow against the impact.
  • the connection members 480 for mounting the cushion supporters 48 are mounted.
  • a rear stopper 414 is arranged, which prevents the rearwardly inclined angular position between the links 410,411,42 , therefore, the rear stopper 414 push each other without a gap.
  • the head member 410 and the links 411 following in chains each have a driver 412, which pulls the downwardly next following member 411 into a prone inclined position from a predefined angle position.
  • the rear stoppers 414 enclose a passage, each with a cover plate 416 internally mounted on the link chain 41 , which together form the upper part of the guide 46 for the adjusting element 47 .
  • the guide 46 terminates in the head member 410 with an additional cover plate 416 at the upper fixed point 415 as a clamping point for the actuator 47.
  • From the bottom member 411 the guide 46 merges into the elongate bridge member 42 and extends to the guide mouth 462 at the lower end of the bridge member 42nd .
  • the actuator 47 extends from the upper fixed point 415 through the guide 46, occurs at the guide mouth 462 in a free space 460 and is taken at the lower fixed point 458 of a receiving unit 459 . Within the free space 460 , the actuator 47 extends in a curved course as a freely suspended length section a.
  • each of the two arms of the backrest connection 43 is provided at the lower end with a molding 44 having the first retaining contour 441 and the second retaining contour 442 to dock with the associated connector 22 .
  • the lower part of the bridge member 41 is installed between the two upwardly directed arms of the backrest connection 43 .
  • each of the two bearing elements 453 has a second elongated hole 455, in which the positioning of the third axle rod 457 is adjustable.
  • the receiving unit 459 is adjustable in itself, for example, by their extension or shortening in relation to the third Achsstab 457.
  • the front part of the receiving unit 459 - this is the lower anchor point 458 - from the interconnected rear anchor part of the receiving unit 459 - in this puts the third axle rod 457 - be set from a closest assembly to a selectable distance.
  • the adjusting arrangement 45 is in a second adjustment (see also Figure 10A ), ie, the sixth rotation axis D6 with the anchor part of the accommodation unit 459 stuck thereon is in the lowermost position in the second elongated hole 455 , and the front part of the accommodation unit 459 is set at a distance from the anchor part.
  • plate-shaped cushion supports 48 and the pad 49 mounted thereon creates a complete backrest 4, which extends over the lumbar and shoulder area and the extending head portion h.
  • This sequence of figures illustrates the details of the entire backrest support 40 in the maximum tilting position R max now occupied by the action of stress on the backrest 4 .
  • the rigidly interconnected assembly of moldings 44, backrest connection 43 and bridge member 42 is inclined backwards and has taken the entire link chain 41 . Due to the backward inclination of the bearing elements 430 on the backrest connection 43 has the fifth Rotated axis D5 moves downward and pulled in the first slots 454 on the fourth axis of rotation D4 bearing elements 453 in an inclined position. Starting from the fixed fourth axis of rotation D4 , the fifth axis of rotation D5 is now below, in relation to the backrest support 40, before D4 and the sixth axis of rotation D6 above D5.
  • the bearing elements 453 are such that the first slot 454 and the second slot 455 are aligned V-shaped to the ground.
  • the adjusting arrangement 45 is still in the second adjustment, thus the sixth axis of rotation D6 with the anchor part of the receiving unit 459 plugged into the second slot 455 is in the lowermost position and the front part of the receiving unit 459 is set at a distance from the anchor part.
  • the gap 460 has narrowed and the free-floating length a of the actuator 47 shortened. Due to the nature of the flexible actuator 47, the positioning of the guide mouth 462 and lower fixed point 458 and the forced course of the actuator 47 in the guide 46, at least a substantial proportion of the shortening of the length section a along the guide 46 is pushed against the upper fixed point 415 . A backward curved deformation between the links 410, 411 is excluded by the abutting rear stops 414 . Moreover, the rear positioning of the upper fixed point 415 on the head member 410 on start-up of the control element 47 favors its only forward bending against the load.
  • the driver 412 on the head member 410 causes a likewise forward bending of the next member 411, which in turn pulls through the associated driver 412, the subsequent member 411 forward.
  • the pre-curved deformation continues only on a few next links 411 within the direction of the bridge member 42 , ie, the links 411 closer to the bridge link 42 in the lumbar region of the user could no longer be detected by the forward bending deflection.
  • With a differentiated dimensioning within the link chain 41 can be in the upper region - substantially over the head portion h - a more intense precurved Deformation, as down in the direction of the bridge member 42 to the lumbar region of the user.
  • the leaning in the seat user experiences from the shoulder upwards a support facing him further.
  • 41 zones of different stiffness can be formed within the link chain, so that, for example, the lumbar area on the seat offers the leaning user a greater resistance to deformation - thus represents harder - and thus supports the user in this body area firmer.
  • FIGS. 8A and 8B This sequence of figures illustrates in addition to the Figures 3A-3D the assembly of base frame 1, placed thereon bottom part 20 of the mechanism 2, connectors 22, backrest connection 43, positioning assembly 45 and initially lifted seat support 21 (s. FIGS. 8A and 8B ).
  • the entire backrest support 40 is fastened with its backrest connection 43 to the connectors 22 .
  • the mold parts 44 are preferably bolted to the connectors 22 , and the first retaining contours 441 of the mold parts 44 engage behind unnamed apertures on the connectors 22 near the second axis of rotation D2.
  • the base 450 of the actuator assembly 45 is seated with its opening 451 on the extending piston rod of the vertical gas spring 12 or could be attached to the bottom part 20 .
  • seat support 21 When seated on the bottom part 20 seat support 21 (s. FIG. 8C ) are both connected to each other on the second rotation axis D2 and the third rotation axis D3 .
  • the seat support 21 follows a backward inclination of the backrest support 40 in the direction of maximum seat tilt S max , which is lowered at the back .
  • the seat can be designed neither as a swivel chair nor can be adjusted in the seat height, also attaching the base 450 to another per se fixed part of the seat, for example, on the base 1, into consideration.
  • the following four pairs of figures show the actuator assembly 45 first variant in four different adjustments, namely in each case in the zero position R 0 of backrest support 40 with associated zero slope S 0 of the seat support 21 and in its maximum tilting position R max with the associated maximum seat tilt S max .
  • the sixth rotation axis D6 is in the second slot 455 in the uppermost position, and the front part of the receiving unit 459 is additionally set with distance to the anchor part.
  • the link chain 41 is formed as a one-piece plastic molding, which starts at the top with a head member 410 , the links 411 follow each other.
  • a bridge member 42 At the lower last member 411 is an integrally or joined together a bridge member 42 , which is rigidly connected to the backrest connection 43 or may be integrally formed with the backrest connection 43 .
  • the link chain 41 is elongated in height and formed with a head section h .
  • the movable links between the links 410,411 and preferably also between the lowermost last link 411 and the bridge link 42 are formed by hinges 417 - eg film hinges.
  • the upper fixed point 415 is provided by the guide 46 extends to the guide opening 462 on the bridge member 42 .
  • rear stoppers 414 are provided, which block a bending of link chain 41 with the transition to the bridge member 42, facing away from the seat part 3 , to the rear.
  • the on the link chain 41 on the backrest support 40 of the first variant on the seat part 3 side facing front stopper 413 - to block a vorgekrümmte deformation against the load, ie the seat part 3 , to block beyond a maximum extent defined - are on the backrest support 40 second Variant not required.
  • the cushion supports 48 may extend integrally from the respective member 410,411,42 .
  • the guide 46 for the longitudinally displaceable embedding of the actuating element 47 - from the upper fixed point 415 through the head member 410, the entire link chain 41 and the bridge member 42 to the guide mouth 462 - is designed and the actuator 47 designed so that when pushed upwards a slip loss is avoided by avoiding the actuator 47 .
  • Each member 410,411 in turn has a driver 412 which engages the lower member 411 located thereunder to draw it into the pre-curved deformation. While the dogs 412 in the backrest support 40 of the first variant are formed by interlocking curved contours with an end stop, the followers 412 in the second variant consist of a hook element within an open cut in the next link 411 with increasing pre-curved deformation of the preceding link 410,411 of this next link 411 pulls forward. Structure and function of the actuator assembly 45 in the first variant are unchanged.
  • the return spring which is necessary for adjustment of backrest support 40 and the entire backrest 4 in the zero position R 0 in the absence of stress, can advantageously by the hinges 417 between the members 411 be formed.
  • an elastomer with its dimensionally stable and elastic property would be suitable and the two-component injection molding method for the production of the backrest carrier 40 efficiently applicable.
  • the actuator 47 in the absence of stress, the adjustment of backrest support 40 and the entire backrest 4 in the zero position R 0 .
  • the restoring action of the adjusting element 47 can be reinforced by an additional elastic tension element. This tension element is fixed between the head member 410 and the bridge member 42 , preferably on the rear side facing away from the user of the backrest support 40th
  • the head member 410 and at least the nearest following members 411 of the link chain 41 have their pre-curved deformation against the loading action.
  • the actuating element acting on the head member 410 at the upper fixing point 415 47 has moved with its driver 412 the connected member 411 , the driver 412 moves the next following member 411 in the same direction.
  • this sequence continues in the link chain 41 correspondingly far in the direction of the bridge member 42 .
  • This sequence of figures relates to the use of an actuating arrangement 45 ' second variant for the backrest support 40 first variant according to the Figures 1A-2C and 4A-7D or the backrest support 40 second variant according to the Figures 13A-14C ,
  • the receiving unit 459 at which the lower fixed point 458 is to anchor the adjusting element 47 , is now in one piece and has a slot 51 for receiving a longitudinally slidable 51 , but rotationally fixed axle pin 50.
  • the axle 50 extends on the connection axis D5 and rests in the bearing elements 430 on the backrest connection 43.
  • From the receiving element 459 extends to the seat support 21, an extension 52 with a wedge-shaped tip, which slidably attached to a bounce 61 of an adjusting unit 6 .
  • the adjusting element 47 projects through the interspace 460 with its section a , penetrates into the lower guide opening 462 of the guide 46 and extends within the guide 46 as far as the upper fixing point 415.
  • the bridge element 42 is still received by the backrest connection 43 .
  • the adjusting unit 6 the actuator 62, which is supported on the present on the seat support 21 stop 211 and is formed for example as a screw.
  • the adjusting unit 6 is articulated on the rear axle D7 . In the case of movable or elastic formation of the bounce element 61 , the articulation on the rear axle D7 would be dispensable and can be replaced by an attachment on the rear of the seat carrier 21 .
  • the actuator 62 in the bouncing element 61 With deeper introduction of the actuator 62 in the bouncing element 61, for example by screwing, the latter is moved to the receiving unit 459 and this thereby shifted on the connection axis D5 with further insertion of the actuating element 47 in the guide 46 . This causes a feed on the upper fixed point 415 on the head member 410, so that the link chain 41 is forced into a further pre-curved deformation.
  • the seat support 21 takes in the existing here mechanism 2 with Synchronous Movement between the backrest 4 and seat part 3 currently zero slope S 0 a.
  • the backrest connection 43 is lowered, taking the receiving unit 459 along with it.
  • the extension 52 moves down the inclined baffle 61 and thereby pushes the receiving unit 459 on the axle 50 in the direction of lower guide mouth 462, so that the steep element 47 is advanced in the guide 46 against the upper fixed point 415 and the link chain 41 so successively in a more intense pre-curved deformation device.
  • the receiving unit 459 moves within the slot 51 via the axle 50 to the left.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (14)

  1. Siège comprenant un dossier (4), dans lequel:
    a) le dossier (4) peut être ajusté à une forme pré-cintrée; et
    b) le dossier (4) possède un support de dossier (40) avec une chaîne à maillons (41) constituée d'une pluralité de maillons (410,411) concaténés déplaçables les uns par rapport aux autres;
    c) un élément de réglage flexible (47) s'étend avec une longueur rigide depuis un point fixe supérieur (415), qui est prévu sur l'un des maillons (410,411) dans la région supérieure du support de dossier (40), le long du support de dossier (40) jusqu'à un point fixe inférieur (458);
    d) chaque maillon (410,411) présente un élément d'entraînement (412) qui vient en prise dans le maillon sous-jacent (411);
    e) l'élément de réglage flexible (47) est encastré dans un guide (46) prévu sur le support de dossier (40), lequel s'étend depuis à proximité du point fixe supérieur (415) jusqu'à un espace intermédiaire (460) placé avant le point fixe inférieur (458); et,
    f) pour le réglage du dossier (4):
    fa) des moyens (43,45;43,45') sont prévus pour déplacer l'élément de réglage (47) dans le guide (46) et pré-cintrer le point fixe supérieur (415) avec le maillon associé (410,411);
    fb) l'élément d'entraînement (412) du maillon (410,411) associé au point fixe supérieur (415), qui vient en prise dans le maillon suivant sous-jacent (411), est prévu pour déplacer ce maillon suivant (411) dans la position pré-cintrée; et
    fc) les autres maillons (412) à l'intérieur de la chaîne à maillons (41) servent chacun à déplacer le maillon accouplé (411) dans la position pré-cintrée, caractérisé en ce que
    g) l'inclinaison du dossier (4) peut être réglée, dans lequel:
    ga) le dossier (4), sous l'effet d'une contrainte appliquée depuis une position nulle (R0) en principe verticale jusqu'à une position inclinée (Rmax) tournée au maximum vers l'arrière, adoptant une forme pré-cintrée successive à l'encontre de l'effet de la contrainte;
    gb) le dossier (4) présentant un ressort de rappel pour l'ajustement du dossier (4) dans la position nulle (R0) en l'absence d'un effet de contrainte;
    gc) une portion longitudinale (a) librement suspendue de l'élément de réglage (47) s'étendant à travers l'espace intermédiaire (460); et
    gd) lors du réglage du dossier (4) dans la direction de la position inclinée (Rmax), les moyens (43,45;43,45') étant prévus pour faire varier la longueur de la portion longitudinale (a) avec un déplacement équivalent de l'élément de réglage (47) dans le guide (46) et pré-cintrage du point fixe supérieur (415) avec le maillon associé (410,411).
  2. Siège selon la revendication 1, caractérisé en ce que
    a) lors du réglage du dossier (4) dans la direction de la position inclinée (Rmax), les moyens (43,45;43,45') pour faire varier la longueur de la portion longitudinale (a) avec déplacement équivalent de l'élément de réglage (47) dans le guide (46) génèrent un raccourcissement de la portion longitudinale (a) avec insertion équivalente de l'élément de réglage (47) dans le guide (46) et pré-cintrage du point fixe supérieur (415) avec le maillon associé (410,411); et
    b) l'élément de réglage (47) a la forme d'un ressort à lame, d'une barre élastique ou d'un câble Bowden ou d'un câble.
  3. Siège selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les moyens (43,45;43,45') comprennent:
    a) un raccord de dossier (43) qui est connecté d'une part à la chaîne à maillons (41) en tant que constituant du support de dossier (40) et qui est articulé d'autre part à un premier axe de rotation (D1) disposé sur le mécanisme (2); et
    b) un agencement de réglage (45,45') qui présente le point fixe inférieur (458) et qui est connecté au raccord de dossier (43).
  4. Siège selon la revendication 3, caractérisé en ce que l'agencement de réglage (45,45'):
    a) est connecté au raccord de dossier (43) sur un axe de raccordement (D5);
    b) présente des moyens (455,457,459) pour l'ajustement du rapport de transmission de la forme pré-cintrée de la chaîne à maillons (41) provoquée par la position inclinée maximale (Rmax); et
    c) présente des moyens (459,6) pour le pré-ajustement d'une forme pré-cintrée de la chaîne à maillons (41) dans la position nulle (R0).
  5. Siège selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que l'agencement de réglage (45) se compose:
    a) d'une deuxième barre axiale (456) s'étendant dans l'axe de raccordement (D5), laquelle repose dans des paliers (430) sur le raccord de dossier (43);
    b) de deux éléments de palier (453), qui sont guidés sur l'axe de raccordement (D5);
    c) d'une base (450) positionnée entre les deux éléments de palier (453), qui est connectée à un composant de siège fixé en soi (1,11,12,20) et qui possède une première barre axiale (452) à travers laquelle s'étend un axe de base (D4) et qui est guidée des deux côtés dans un premier trou oblong respectif (454) dans les deux éléments de palier (453); et
    d) d'une unité de réception (459) sur laquelle se trouve le point fixe inférieur (458) et qui possède une troisième barre axiale (457), à travers laquelle s'étend un axe de liaison (D6) et qui est articulée des deux côtés aux deux éléments de palier (453).
  6. Siège selon la revendication 5, caractérisé en ce que pour le réglage de la position du point fixe inférieur (458):
    a) chacun des deux éléments de palier (453) possède un deuxième trou oblong respectif (455) dans lequel le positionnement de la troisième barre axiale (457) peut être ajusté; et/ou
    b) l'unité de réception (459) est réglable en soi, par exemple par prolongement ou raccourcissement par rapport à la troisième barre axiale (457).
  7. Siège selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que l'agencement de réglage (45') se compose:
    a) d'une unité de réception (459):
    aa) le point fixe inférieur (458) se trouvant sur l'unité de réception (459);
    ab) l'unité de réception (459) présentant un trou oblong (51) dans lequel est guidé, de manière solidaire en rotation et coulissante, un boulon axial (50) s'étendant sur l'axe de raccordement (D5); et
    ac) une saillie (52) s'étendant depuis l'unité de réception (459); et
    b) d'une unité d'ajustement (6), dans lequel:
    ba) l'unité d'ajustement (6) étant fixée à un support de siège (21) appartenant au siège, de préférence étant articulée à un axe arrière (D7) disposé sur le support de siège (21);
    bb) l'unité d'ajustement (6) présentant un élément de rebondissement (61), dont la position peut varier au moyen d'un actionneur (62); et
    bc) l'élément de rebondissement (61) butant contre la saillie (52) afin de positionner l'unité de réception (459) guidée sur le boulon axial (50) en fonction de l'ajustement contre l'unité d'ajustement (6); et
    c) la saillie pouvant avoir une surface de clavette qui s'applique contre l'élément de rebondissement (61) et qui se déplace vers le bas lors du réglage du dossier (4) dans la direction de la position inclinée (Rmax) sur l'élément de rebondissement (61).
  8. Siège selon la revendication 1, caractérisé en ce que
    a) la chaîne à maillons (41) se termine le plus en haut avec un maillon de tête (410) dans lequel est prévu le point fixe supérieur (415) et auquel se raccorde un premier organe de maillon (411) suivi par d'autres organes de maillon (411);
    b) un maillon formant pont (42) se raccorde au dernier maillon de chaîne inférieur (411) qui est connecté rigidement au raccord de dossier (43) ou qui est réalisé d'une seule pièce avec le raccord de dossier (43); et
    c) la chaîne à maillons (41) du support de dossier (40) peut être réalisée jusqu'à la région des épaules de l'utilisateur, ou, prolongée en hauteur, jusqu'à une partie de tête (h).
  9. Siège selon la revendication 8, caractérisé en ce que
    a) les enchaînements mobiles sont formés entre les maillons (410,411) de la chaîne à maillons (41) et de préférence également entre le dernier maillon de chaîne inférieur (411) et le maillon formant pont (42) de charnières (417) sous la forme d'éléments ou de charnières à film à engagement positif les uns avec les autres;
    b) la chaîne à maillons (41) est pourvue, du côté opposé à la partie de siège (3), de bouchons arrière (414), qui bloquent vers l'arrière une flexion de la chaîne à maillons (41) et du maillon formant pont (42), à l'opposé de la partie de siège (3); et
    c) la chaîne à maillons (41), du côté tourné vers la partie de siège (3), peut être pourvue de bouchons avant (413), qui bloquent une déformation pré-cintrée à l'encontre de l'effet de contrainte, en direction de la partie de siège (3), au-delà d'une masse maximale définie.
  10. Siège selon la revendication 3, caractérisé en ce que le mécanisme (2) placé sur une sous-structure (1):
    a) lors du réglage du dossier (4) entre la position nulle (R0) et la position inclinée (Rmax), sert au mouvement synchrone de la partie de siège (3) entre une inclinaison nulle (S0) et une inclinaison maximale (Smax);
    b) présente une partie de fond (20) placée de manière en principe fixe sur la sous-structure (1), à travers laquelle s'étend le premier axe de rotation (D1) en principe fixe;
    c) comprend un support de siège (21) supportant la partie de siège (3), à travers lequel s'étendant un deuxième axe de rotation (D2), auquel sont articulés d'une part des éléments de connexion (22), lesquels sont articulés d'autre part au premier axe de rotation (D1); et
    d) possède un troisième axe de rotation (D3) s'étendant à travers la partie de fond (20), auquel est articulé le support de siège (21).
  11. Siège selon la revendication 10, caractérisé en ce que
    a) le raccord de dossier (43) est fixé aux éléments de connexion (22);
    b) le raccord de dossier (43) est réalisé avec deux bras et les deux bras présentent, aux extrémités tournées vers les éléments de connexion (22), une pièce moulée respective (44), qui est prévue pour la fixation à l'élément de connexion associé respectif (22);
    c) au moins certains maillons (410,411) de la chaîne à maillons (41) et éventuellement aussi le maillon formant pont (42) sont pourvus de supports de rembourrage (48), qui servent au support d'un rembourrage (49) prévu sur le dossier (4); et les supports de rembourrage (48):
    d) sont fixés au moyen d'organes de raccordement (480) au maillon respectif (410,411,42); ou
    e) s'étendent d'une seule pièce depuis le maillon respectif (410,411,42).
  12. Siège selon la revendication 11, caractérisé en ce que la chaîne à maillons (41):
    a) est une pièce moulée en plastique d'une seule pièce; ou
    b) est une pièce moulée en plastique réalisée d'une seule pièce avec les supports de rembourrage (48); ou
    c) est une pièce moulée en plastique réalisée d'une seule pièce avec les supports de rembourrage (48) et le maillon formant pont (42); ou
    d) est une pièce moulée en plastique réalisée d'une seule pièce avec les supports de rembourrage (48), le maillon formant pont (42) et le raccord de dossier (43); et
    e) le ressort de rappel, pour l'ajustement du dossier (4) dans la position nulle (Ro), en l'absence d'un effet de contrainte:
    ea) est une fonction supplémentaire de l'élément de réglage (47) et, pour renforcer la fonction de rappel de l'élément de réglage (47), un élément de traction séparé peut être fixé sur le support de dossier (40), l'élément de traction étant fixé de préférence du côté arrière du support de dossier (40) opposé à l'utilisateur entre le maillon de tête (410) et le maillon formant pont (42); ou
    eb) est formé par les charnières (417) entre les maillons (411) et/ou par la fonction supplémentaire de l'élément de réglage (47) et/ou par l'élément de traction séparé.
  13. Siège selon la revendication 1, caractérisé en ce que
    a) au niveau du support de dossier (40) à l'intérieur de la chaîne à maillons (41):
    aa) différentes zones de courbure de forme pré-cintrée variée avec des rayons de courbure en principe différents sont réalisées; et/ou ab)
    différentes zones de rigidité avec une résistance à la déformation différente sont réalisées; et
    ac) les différentes zones de courbure avec les différentes zones de rigidité peuvent être réalisées de manière superposées les unes aux autres; et/ou
    b) sur le support de dossier (40) à l'intérieur de la chaîne à maillons (41):
    ba) dans sa région supérieure, par rapport à la région inférieure, est prévue une forme pré-cintrée plus fortement, afin d'offrir à l'utilisateur s'appuyant dans le siège, depuis les épaules vers le haut, un appui davantage tourné vers lui, ce qui peut être obtenu avec un dimensionnement différent et/ou un apport de matériau différent à l'intérieur de la chaîne à maillons (41); et
    bb) la région lombaire par rapport au reste de la chaîne à maillons (41) est réalisée avec une plus forte résistance à la déformation afin de supporter ainsi plus fermement l'utilisateur dans cette région du corps.
  14. Siège selon la revendication 10, caractérisé en ce que
    a) entre la sous-structure (1) et le mécanisme (2) est disposé un ressort, de préférence un ressort à gaz (12), pour ajuster la hauteur du siège;
    b) le siège est réalisé sous forme de chaise rotative;
    c) la base (450) de l'agencement d'adaptateur (45) est fixée au niveau de la partie de fond (20) du mécanisme (2) ou au niveau d'une tige de piston sortant du ressort à gaz (12) de réglage en hauteur;
    d) le support de dossier (40) est muni d'un rembourrage (49) du côté tourné vers l'utilisateur, lequel a une région lombaire et peut présenter en haut une partie de tête (h); dans lequel
    e) un élément de support ajustable en hauteur étant prévu dans la région lombaire du rembourrage (49) et la partie de tête (h) pouvant être déplacée en hauteur.
EP11745478.5A 2010-07-31 2011-07-30 Siège avec dossier à pré-cintrage réglable Active EP2598000B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01252/10A CH703477A2 (de) 2010-07-31 2010-07-31 Sitz mit einer in eine vorgekrümmte Verformung einstellbaren Rückenlehne.
PCT/CH2011/000175 WO2012016342A1 (fr) 2010-07-31 2011-07-30 Siège avec dossier à pré-cintrage réglable

Publications (2)

Publication Number Publication Date
EP2598000A1 EP2598000A1 (fr) 2013-06-05
EP2598000B1 true EP2598000B1 (fr) 2014-04-23

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EP11745478.5A Active EP2598000B1 (fr) 2010-07-31 2011-07-30 Siège avec dossier à pré-cintrage réglable

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US (1) US20130127219A1 (fr)
EP (1) EP2598000B1 (fr)
CH (1) CH703477A2 (fr)
WO (1) WO2012016342A1 (fr)

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US11071386B2 (en) * 2016-06-09 2021-07-27 Sava Cvek Seat pivoting mechanism and chair height locking system
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DE202016105769U1 (de) * 2016-10-14 2016-11-10 Topstar Gmbh Sitzmöbel
US10299602B2 (en) * 2017-03-22 2019-05-28 Yao-Chuan Wu Chair
DE102018109486A1 (de) * 2018-04-20 2019-10-24 Klöber GmbH Lordosenstütze für Sitzmöbel, vorzugsweise für Arbeitsstühle
KR102518806B1 (ko) * 2018-11-26 2023-04-05 현대자동차주식회사 자동차용 다관절 시트백
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WO2012016342A1 (fr) 2012-02-09
CH703477A2 (de) 2012-01-31
EP2598000A1 (fr) 2013-06-05
US20130127219A1 (en) 2013-05-23

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