EP2908696B1 - Ajustage synchrone de siège - Google Patents

Ajustage synchrone de siège Download PDF

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Publication number
EP2908696B1
EP2908696B1 EP12780635.4A EP12780635A EP2908696B1 EP 2908696 B1 EP2908696 B1 EP 2908696B1 EP 12780635 A EP12780635 A EP 12780635A EP 2908696 B1 EP2908696 B1 EP 2908696B1
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EP
European Patent Office
Prior art keywords
axis
seat
rotation
region
spring
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
EP12780635.4A
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German (de)
English (en)
Other versions
EP2908696B2 (fr
EP2908696A1 (fr
Inventor
Thomas Schneider
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
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Vitra Patente AG
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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
    • 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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil 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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • 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
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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
    • 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

Definitions

  • the present invention relates to a chair with mutually synchronous adjustment between the back and seat tilt from a zero position with in principle upright backrest to a maximum inclination.
  • the chair has a base for placing on the ground, on which a base is rigidly attached.
  • a seat carrier which has a seating area and a back area.
  • the chair includes two backrest brackets which are mutually differently deflectable and are fastened on the one hand to the base and on the other hand to the back region of the seat support.
  • the seat carrier is covered with a cover.
  • height adjustable gas spring is arranged in the base on which rests the base to adjust the seat support to a user's needs corresponding height and to rotate about a vertical axis.
  • EP 1 401 306 B1 discloses a chair with a seat and a backrest, each consisting of a number of mutually independently movable, block-like joined together elements.
  • the division of the elements runs parallel to the chair front, and depending on the weight shift of the user, the individual elements are deflected in different intensity with lateral inclination.
  • Subject of the WO 2007/110 729 A2 is a chair whose backrest has two elastic side rails with a ribbed structure. With asymmetric load on the backrest, the side rails are deflected differently.
  • the chair according to the EP 1 946 676 B1 allows a mutually synchronous adjustment between back tilt and seat tilt, over a range between a respective zero position of back tilt and seat tilt and a respective maximum back tilt and seat tilt.
  • a base is rigidly attached to the base for placement on the floor.
  • a seat carrier which has a seating area and a back area.
  • Two mutually different deflectable backrest bar are attached on the one hand to the base and on the other hand to the back of the seat support, so that a sprung lateral inclination of the seat is made possible.
  • the invention Based on the conditions of a mutually synchronous adjustment between back and seat tilt on a chair and also an asymmetrical lateral deflection, the invention has for its object to propose a perfected for mass production and ergonomic optimal performance characteristics of the chair construction. Considerable aspects here are the most efficient use of materials, a productive assembly in series production, ease of service with minimal maintenance and the possibility of an aesthetic design of the chair.
  • the chair is of the type with mutually synchronous adjustment between back tilt and seat tilt, namely over a range between a respective zero position of back tilt and seat tilt and a respective maximum back tilt and seat tilt.
  • the chair has a base for placing on the ground, on which a base is rigidly attached.
  • a seat carrier which has a seating area and a back area.
  • the chair includes two backrest brackets which are mutually differently deflectable and are fastened on the one hand to the base and on the other hand to the back region of the seat support.
  • the two backrest brackets are articulated independently of each other on a fixed first axis of rotation at the base.
  • the seating area of the seat carrier is on a fixed second Rotational axis hinged to the base.
  • the two backrest brackets are articulated independently of each other on an elastically deformable third axis of rotation on the back region of the seat support.
  • the back region of the seat support is elastically twistable.
  • a first spring unit is provided, which acts against the respective movable backrest bar.
  • a second spring unit is present, which is supported on the one hand at the base in a fixed abutment and on the other hand acts against the respective movable backrest bracket.
  • the first spring unit is adjustable and comprises two separate first spring elements.
  • the second spring unit comprises two separate second spring elements.
  • the base is a U-shaped housing having a central portion and two legs extending arm-like therefrom. In each of the legs, a second spring element is arranged. The first axis of rotation extends through the central part, while the second axis of rotation extends through the free ends of the two legs.
  • the seat carrier comprises two spars which extend over the seating area and the back area. At the two spars upper connecting organs are present in the back region through which the third axis of rotation runs. On the two spars, middle connecting elements are present in the seating area, through which runs a fourth axis of rotation. Between the two spars, a first transverse strut is arranged in the seating area, at which there are front connecting elements through which the second axis of rotation passes.
  • the first cross strut is located forward in the seating area, and between the two struts extends behind in the seating area a second cross strut.
  • the back area is bridged by a spine strap between the two spars.
  • the two spars, the two cross struts and the back bracket form the seat support as assembled items or the seat support is in one piece as Plastic injection molded part.
  • Each bar has a range of elasticity between the seating area and the back area.
  • the chair can be equipped with armrests, of which each arm is articulated on the one hand on the third axis of rotation and on the other hand on the fourth axis of rotation.
  • Each armrest has a support region horizontally extending from the third rotation axis in principle, and a support region extending upward from the fourth rotation axis. There is a transition between the support area and the support area.
  • the armrests support the damping effect of the first spring unit and the second spring unit when moving the chair into the maximum back tilt and seat tilt. As the chair moves back toward the zero position of the back tilt and seat tilt, the armrests support the restoring force of the two spring units.
  • the armrests are made in one piece as a plastic injection molded part.
  • the base extends a fixed fifth axis of rotation on which a pre-adjuster for adjusting the intensity of the first spring unit is arranged.
  • the single first spring element is a block-shaped body made of elastomer, which is arranged at the base of each backrest bar.
  • On the pre-adjuster two displaceable pressure pieces are arranged along the fifth axis of rotation, of which one of the pressure pieces is assigned to one of the first spring elements.
  • the plungers can be aligned by actuation of the preselector with a selectable degree of congruence on the two first spring elements to move the chair in the maximum back tilt and seat tilt according to the squeezed between the lugs and the pressure parts of the first spring elements together with the action of the second Spring unit to achieve the desired damping.
  • the second spring elements of the second spring unit are helical compression springs.
  • Each second spring element is provided with an end piece, which has a fixing member which receives one end of the spring element and thus a spring assembly is formed.
  • a sixth axis of rotation extends through the lugs both backrest bar, on which the end pieces of both spring packages are articulated.
  • the spars of the seat support have a longitudinal groove, in which a cover for overstretching the seat support can be fixed.
  • a height-adjustable gas spring is arranged, on which rests the base to adjust the seat support to a user's needs corresponding height and rotatable about a vertical axis.
  • the chair consists of the ground-engaging on the base frame 1 with the resting upon fork-shaped base 2. From the base 2 extend upwardly two spaced backrest bracket 3, to each of which a carrier 6 and a respective armrest is attached. 7
  • the base 1 has a star-shaped foot 10 from which extends centrally a vertical standpipe 11 , which Recording a vertical gas spring 12 is used.
  • the foot 10 is provided with a plurality of bottom elements 14, eg rollers.
  • Through the rear portion of the base 2 extends a fixed first axis of rotation D1, on which the backrest bar 3 are articulated and on which a height adjuster 25 is guided axially movable. With the height adjuster 25 , the gas spring 12 can be operated and thus vary the height of the seat according to the needs of a user. At the same time allows the gas spring 12 to rotate the seat about a vertical axis V , as is common for comfortable office chairs.
  • a fixed second axis of rotation D2 at which the one or more parts procured carrier 6 is hinged front.
  • the carrier 6 On the rear side, the carrier 6 is also connected on the movable third axis of rotation D3 with the two backrest bars 3 .
  • This third axis of rotation D3 is pivotable about the first axis of rotation D1 and extends through the back portion 62 of the carrier 6.
  • On the fixed fifth axis of rotation D5 of the rotatable pre-adjuster 24 is arranged, with which for the deflection of the back and seat tilt from the zero position R 0 , S 0 varies required force.
  • a fixed axis A is parallel spaced from the axes of rotation D1, D2, D3 and serves to receive the second spring unit 5 described later (s. FIG. 3A ).
  • the chair is equipped with two armrests 7 , which are hinged on the one hand in the third axis of rotation D3 and on the other hand in a movable fourth axis of rotation D4 , which extends through the seat portion 61 of the support 6 and is also pivotable about the first axis of rotation D1 .
  • the individual quasi-angular armrest 7 is structured into the support region 71, which projects upwards from the fourth rotation axis D4 , and into the essentially horizontal support region 72, which leads to the third rotation axis D3 .
  • Between the support portion 71 and the support portion 72 is an arcuate transition 78th
  • the carrier 6 is composed essentially of two strip-shaped, mutually parallel and in principle L-shaped bent bars 60 , between which a first transverse strut 63, a second transverse strut 67 and a spine 64 extend, connecting the spars 60 together.
  • the entire carrier 6 can be made in one piece or the transverse struts 63, 67 and the back bar 64 are inserted between the bars 60 as separate parts.
  • the first transverse strut 63 extends at the front and the second transverse strut 67 at the rear in the seating area 61, while the back bar 64 extends over the back area 62 .
  • the transition between the seating area 61 and the back area 62 is designed as a region of elasticity 68 .
  • Each spar 60 has on its outwardly facing side a groove 66 in which a cover 69 is fixed, which spans the entire carrier 6 on the front, so that a quasi-horizontal seat and a quasi-vertical backrest for the user arises.
  • FIGS. 2A and 2B are identical to FIGS. 2A and 2B.
  • the first transverse strut 63 has at its free ends connecting members in order to connect them with the existing on each spar 60 recording. From the first transverse strut 63 go from two spaced apart front connecting members 630 , each having a front axle hole 633 , through which the second axis of rotation D2 extends. Adjacent to the elastic region 68 , the second transverse strut 67 is present between the bars 60, adjacent to the seating area 61 . The free ends of the second transverse strut 67 have connecting members, which serve to connect to the receptacle on the associated spar 60 .
  • each strut 60 Between the second transverse strut 67 and the first transverse strut 63, there is provided on each strut 60 a central connecting element 610 which has a fifth axis hole 615 . Between the elastic region 68 and adjacent to the back region 62 , each spar 60 has an upper connecting member 620 with a fourth axle hole 624. Between the bars 60 extends near the lower end of the back region 62 of the back bar 64. The back bar 64 has on both sides at the outer ends each a connector 640, which are complementary to the located on the respective spar 60 upper connecting member 620 are provided. The fixation of the two transverse struts 63,67 and the back strap 64 on the respective spar 60 is effected for example by means of screws.
  • the single armrest 7 has at the free end of the support portion 72 an upper axle pin 74 which extends on the third axis of rotation D3 .
  • a lower axle pin 75 which is directed to the fourth axis of rotation D4 .
  • the armrests 7 are offset slightly outwards relative to the carrier 6 , the third axis of rotation D3 running through the upper axle pins 74 of the armrests 7 and the fourth axle holes 624 of the upper connecting members 620 of the uprights 60 .
  • the fourth axis of rotation D4 extends in alignment through the lower axle pins 75 of the armrests 7 and the fifth axle holes 615 of the central connecting members 610 of the bars 60.
  • axle pins 224 are located on the second axis of rotation D2 and are intended for insertion into the base 2 .
  • the carrier 6 at its front Connecting members 630 pivotally connected to the base 2 at the level of the second axis of rotation D2 .
  • the undercarriage 1 is shown here removed from the base 2 .
  • the seat regions 61 and the back regions 62 are also elastic on the carrier 6 outside the elasticity regions 68 .
  • the first and second transverse strut 63,67 and the back strap 64 may be elastic.
  • the support portions 71 and the support portions 72 may be elastic.
  • the carrier 6 as a one-piece plastic injection molded part and the cover 69 as a one-piece, about the carrier 6 aufschrumpfbares tissue.
  • the base 2 is composed of a housing 20, the presetter 24 and the height adjuster 25 .
  • the housing 20 has a central part 21, from which two mutually spaced, parallel leg 22 depart. Through the middle part 21 , the first axis of rotation D1 , the fifth axis of rotation D5 and the axis A.
  • the second axis of rotation D2 extends near the free ends of the legs 22, wherein in alignment on the second axis of rotation D2 each an axle pin 224 is ready for insertion.
  • An adjustable height slider 26 for blocking the zero position of the back and seat inclination R 0 , S 0 or to their release for the deflection in the maximum back and seat inclination R max , S max is provided at the rear end of the central part 21 .
  • the slider 26 has a plate 260 on which two vertically spaced apart webs 261 extend, which engage in existing on the housing 20 complementary grooves, so that the slider 26 is guided in the downward or upward movement. Of the plate 260 extends at the top edge in each case laterally a boom 262, on which a block-shaped block 263 sits. The block 263 serves the later described blocking the back or seat tilt. Opposite the top edge of the slider 26 is at its lower edge a bar 264 available to allow ergonomic access for the user.
  • the plate 260 has elevations that are intended for complementary engagement in existing on the cover 27 contours.
  • the slider 26 is fixed to the housing 20 , but the downward or upward movement of the slider 26 is ensured.
  • a cap 28 is for closing the present at the central part 21 third cavity 213 (s. FIG. 4A ) intended.
  • the pre-adjuster 24 lying on the fifth axis of rotation D5 consists of a spindle 240 with an external thread 241. At one end of the spindle 240 , a handle 243 can be positioned, wherein a fuse 242 can be attached to the opposite end of the spindle 240 .
  • Two quasi-rectangular pressure pieces 23 are in the direction of escape to the fifth axis of rotation D5 and are intended for complementary engagement with the external thread 241 of the spindle 240 .
  • the height adjuster 25 located on the first axis of rotation D1 has a rod 250 on which two sleeves 251, four bushes 252, a trigger 253, a fuse 254, a spring 255 and a handle 256 can be positioned.
  • the backrest bar 3 are constructed mirror-symmetrically, so that only one backrest bar 3 is to be described below.
  • the backrest bar 3 has a projection 30, in which a lower axle hole 302 is seated, which is aligned with the first axis of rotation D1 .
  • Adjacent to the projection 30 is a shoulder 31, which is provided with a contour 310 .
  • the contour 310 is stepped and has a first shoulder 311 and a second shoulder 312, to which the clearance 313 adjoins.
  • Adjacent to the shoulder 31 is a cutout in the form of a bearing 32 is provided, which serves to receive the insert 320 .
  • the bearing 32 or the insert 320 seated later therein is traversed by a sixth axis of rotation D6 which lies parallel to the first axis of rotation D1 .
  • a sixth axis of rotation D6 which lies parallel to the first axis of rotation D1 .
  • the third axis of rotation D3 which extends through the upper axle hole 324 .
  • the first spring unit 4 consists of two, quasi trapezoidal first spring elements 40, preferably made of elastically deformable plastic, which are fixed to the respective shoulder 31 of the corresponding backrest bracket 3 .
  • the second spring unit 5 is composed of two identical packages 50 through which the axis A and the sixth axis of rotation D6 extend. For the escape direction of the axis A of each package 50 of the pin 57 is assigned, which fixes the package 50 in the base 2 .
  • Each package 50 associated bolt 55 is aligned with the sixth axis of rotation D6 and penetrates in the assembled state the seated in the bearing 32 insert 320th
  • the middle part 21 of the housing 20 has adjacent to each leg 22 each have a first cavity 210, which serves to receive the corresponding pressure piece 23 .
  • a second cavity 220 for storing the package 50 is present in the longitudinal extension of each leg 22 .
  • the third cavity 213 is provided, which serves for the insertion of the trigger 253, the fuse 254 and the spring 255 of the height adjuster 25 .
  • the vertical gas spring 12 can be partially inserted and fixed from the underside of the middle part 21 into a receptacle which is quasi aligned with the third cavity 213 .
  • first axle holes 211 are present, which are all aligned with the fifth axis of rotation D5 .
  • the first axle hole 211 is provided only on the side of the presetter 24 . Adjacent thereto is located in the partition wall between the first cavity 210 and the second cavity 220, a further first axle hole 211. Between the two first cavities 210 and third cavity 213 each a further first axle hole 211 is mounted in the corresponding wall. In the partition wall between the first cavity 210 and second cavity 220 , the remaining first axle hole 211 is positioned.
  • both outer side walls of the housing 20 there are still a total of four second axle holes 212, all of which are aligned with the first axis of rotation D1 .
  • each have a second axle hole 212 is provided in both outer side walls of the housing 20 .
  • Adjacent thereto is located between the two first cavities 210 and third cavity 213 in the corresponding wall depending one another second axle hole 212.
  • the first axle holes 211 and second axle holes 212 are located in the housing 20 a total of four holes 217, all of which are aligned with the axis A.
  • Both outer side walls of the housing 20 are provided with a hole 217 . Adjacent thereto sits in the partitions between the first cavity 210 and second cavity 220 depending on a further hole 217.
  • a front fixing member 221 which rises from the bottom surface opposite the front fork 222 .
  • the single leg 22 has at its free end the front fork 222 with a third axle hole 223 therein.
  • the second rotation axis D2 extends in alignment through the two third axle holes 223.
  • the packets 50 belonging to the second spring unit 5 are constructed identically so that only one of them will be described below.
  • a second spring element 51 in the form of a spiral spring is connected to an end piece 52 on the basis of a rear fixing element 53 .
  • the end piece 52 has a slot 54, which is later penetrated by the pin 57 .
  • the end piece 52 has opposite the rear fixing member 53, a rear fork 56, in which the insert 320 is located.
  • the bolt 55 extends through the two holes in the rear fork 56 and the insert 320 and is secured with the fuse 550 in the axial direction along its sixth axis of rotation D6 .
  • the axis A passes through the pin 57 and the slot 54 in the end piece 52 in alignment .
  • FIGS. 4D and 4E (first construction phase)
  • the second spring unit 5 is inserted into the base 2 and connected thereto. Initially, the insert 320 is placed in the rear fork 56 on the corresponding package 50 and secured in the axial direction along the sixth axis of rotation D6 by means of the bolt 55 and the securing device 550 . Then, the respective package 50 is pushed with the second spring member 51 first in the corresponding second cavity 220 on the leg 22 until the free end of the second spring member 51 is inserted on the front fixing member 221 . The pin 57 is in the slot 54 on the axis A and rests in the holes 217. This process is done in the same way with the other package 50. The pin 57 has on one side a shoulder which is located on the second wall adjacent to each second cavity 220 . The reduced diameter extension of the pin 57 is seated in the complementary hole 217 of the partition. When inserting the pin 57 raises the corresponding package 50 easily.
  • FIGS. 4F and 4G (second construction phase)
  • each first cavity 210 the corresponding pressure piece 23 is inserted.
  • the individual pressure piece 23 rests with a bulge along the inner thread on the upper side of the inner surface of the first cavity 210 , whereby the friction is minimized in the adjusting process described later and thus the adjustment of the pressure pieces 23 is smooth.
  • This position of the plungers 23 must be aligned accordingly and fixed until the - shown in the next build-up - pre-adjuster 24 extends through the housing 20 .
  • the base 2 belonging to the adjuster 24 inserted within the housing 20 and extends through its spindle 240, the five first axle holes 211 and the two plungers 23.
  • the two plungers 23 are in complementary engagement with the corresponding external threads 241 on the spindle 240. If the Spindle 240 penetrates all five first axle holes 211 and is in its intended end position, this is provided with the fuse 242 , which is positioned in the second cavity 220 adjacent to the first axle hole 211 . In this case, the fuse 242 sits in an existing on the shaft 240 circumferential groove.
  • the handle 243 can be fixed on the spindle 240, for example by means of latching or gluing or a thread.
  • the cover 27 is fixed with the screw 270 , but allows the slide 26 a down or upward movement for the later described blocking or release of the synchronous adjustment of back and seat tilt.
  • the two backrest brackets 3 are approximated to the base 2 , wherein the bearing 32 is aligned with the approach 30 of the backrest bracket 3 on the respective insert 320 to the package 50 out.
  • FIG. 5B (fifth build-up phase)
  • the first spring unit 4 is inserted with the first spring element 40 .
  • FIG. 5C (sixth construction phase)
  • the first spring elements 40 are fixed to the shoulders 31 , for example, glued, and in each case a pair of sockets 252 is inserted into the associated lower axle hole 302 in the projection 30 of the backrest bracket 3 .
  • FIGS. 5D and 5E (Seventh construction phase)
  • the single backrest bar 3 is in the lowered position to the corresponding package 50 of the second spring unit 5 docked (s. FIG. 5D ).
  • the bearing 32 engages the lug 30 partially use 320 at the package 50, and the first spring member 40 is spaced opposite to the first cavity 210th
  • the two plungers 23 must be positioned on the presetter 24 so that they allow the erection of the backrest bar 3 described in the subsequent step.
  • the bearing 32 located at the neck 30 completely surrounds the insert 320 located on the package 50 , and the first spring element 40 lies completely in the first cavity 210 (see FIG. FIG. 5E ).
  • FIGS. 5F and 5G (eighth assembly phase)
  • a sleeve 251 is approximated from each side of a leg 22 of the housing 20 to the second axis hole 212 and lies in alignment with the first axis of rotation D1.
  • the sleeves 251 are inserted into the second axial holes 212 .
  • the individual sleeve 251 extends through the second axle hole 212 located in the outer wall of the leg 22 , the bushes 252 inserted in the lower axle hole 302 , the axle hole 212 between the first cavity 210 and the third cavity 213 does not protrude into the third cavity 213 , but concludes flush with it.
  • the single backrest bar 3 is in this situation under slight bias, ie the second spring element 51 is slightly compressed, so that the backrest bar 3 remains in an upright position.
  • the height adjuster 25 is approximated to the right leg 22 , while the pre-adjuster 24 protrudes from the left leg 22 .
  • the rod 250 and the handle 256 lie in the direction of escape to the first axis of rotation D1.
  • the trigger 253, the fuse 254, the spring 255 and the cap 28 are above the third cavity 213 ready for installation.
  • the guided in the sleeves 251 rod 250 passes through the sleeve 251, which faces the handle 256 completely, whereas the other sleeve 251 only partially.
  • the rod 250 When pushing through the first sleeve 251 , the rod 250 reaches with its front end the third cavity 213 and receives the trigger 253 and the spring 255 , which are in the direction of escape to the first axis of rotation D1 .
  • the front end of the rod 250 is guided in the second sleeve 251 , which is located on the side of the housing 20 on which the handle 243 is positioned.
  • the seated on the spindle 250 handle 256 is either locked, glued or screwed.
  • the fuse 254 is snapped by a present at the trigger 253 slot on an existing rod 250 circumferential groove.
  • the fuse 254 is within the trigger 253 and allows the height adjuster 25 only an axial process in the effective range of the spring 255 on the first axis of rotation D1.
  • the spring 255 is compressed upon actuation of the height adjuster 25 and thus causes after actuation a restoring force to push the handle 256 in its original position.
  • the cap 28 is snapped onto the trigger 253 and thus closes the third cavity 213.
  • the cap 28 at the bottom has a complementary to the trigger 253 contour.
  • the chair is currently in the zero position with minimal back and seat inclination R 0 , S 0 .
  • the second spring unit 5 is under the montagegefflessen bias, in which the pins 57 abut in the slots 54 towards the front of the chair and thus limit the zero position on the chair.
  • the minimum preload is set on the first spring unit 4 .
  • both plungers 23 are positioned on the basis of the presetter 24 so that the smallest overlap with the respective first spring element 40 is formed.
  • S max are pressed by the increasing inclination of the backrest bar 3 sitting on the shoulders 31 of the projections 30 first spring elements 40 to the plungers 23 with the lowest spring resistance.
  • This setting is suitable for lightweight users.
  • the chair is in maximum back and seat inclination R max , S max .
  • the second spring unit 5 is under increased tension, in which the pins 57 strike in the oblong holes 54 in the direction of the chair back and thus limit the maximum back and seat inclination R max , S max on the chair.
  • the compression of the second spring unit 5 is effected by the engagement of the bearings 32 in the rear forks 56 of the respective package 50 on the sixth axis of rotation D6, which is pivotable about the fixed first axis of rotation D1 .
  • Set is the minimum preload on the first spring unit 4 as in the pair of figures 6A and 6B, so both plungers 23 are positioned with the slightest overlap with the respective first spring element 40 .
  • the back region 62 of the carrier 6 has moved to the rear and thus also causes the first spring elements 40 to be largely pressed against the pressure pieces 23 , but with the lowest overlap.
  • the previously lowest spring resistance has increased somewhat and contributes to the restoring force in the zero position somewhat.
  • S max and as restoring force in the zero position also contribute to the armrests 7 , which are now widened in particular as a result of the displacement of the third axis of rotation D3 , eg by bending along the support portions 71 and / or at the crossings 78.
  • the spring forces of the first spring unit 4 and / or the second spring unit 5 must be adequately increased in size.
  • the slide 26 closes in unblocked position with its bar 264 almost flush with the lower edge of the central portion 20 and is retracted.
  • the slider 26 protrudes with its bar 264 beyond the lower edge of the central portion 20 and is thus extended.
  • the block 263 is now located below the second paragraph 312 of the contour 310 of the backrest bar. 3 and is present at the contour 310 . Thus, there is no more clearance 313 between the contour 310 and the block 263 .
  • the backrest bar 3 is locked in the zero position with the minimum back and seat inclination R 0 , S 0 .
  • the effectiveness of the first spring unit 4 and the second spring unit 5 divided equally and independently on both sides of the chair and the mutually independent effectiveness of the elasticities on the support 6 and on the armrests 7 results in improved comfort by the right and the left shoulder region of the backrest ever after weight distribution by the user sitting in the chair deformed elastically different degrees.

Landscapes

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

Claims (11)

  1. Fauteuil permettant un réglage synchronisé entre l'inclinaison du dossier (R) et l'inclinaison de l'assise (S), sur une plage comprise entre une position de départ respective de l'inclinaison du dossier (R0 ) et de l'inclinaison de l'assise (S0 ) et les inclinaisons maximales respectives du dossier (Rmax ) et de l'assise (Smax), avec :
    a) un châssis (1) destiné à être posé sur le sol;
    b) une base (2), qui est fixée de manière rigide sur le châssis (1) ;
    c) une coque de siège (6) reliée à la base (2), qui présente une zone d'assise (61) et une zone de dossier (62) ;
    d) deux supports tubulaires (3), qui peuvent être déviés différemment l'un par rapport à l'autre et sont fixés d'un côté sur la base (2) et de l'autre côté sur la zone de dossier (62) de la coque de siège (6),
    e) la zone d'assise (61) de la coque de siège (6) qui est articulée sur un deuxième axe de rotation fixe (D2) sur la base (2) ;
    f) la zone de dossier (62) de la coque de siège (6) qui peut subir une torsion élastique,
    caractérisé en ce que
    g) les deux supports tubulaires (3) qui sont articulés sur un premier axe de rotation fixe (D1) sur la base (2) indépendamment l'un de l'autre ;
    h) les deux supports tubulaires (3) qui sont articulés sur un troisième axe de rotation élastiquement déformable (D3) sur la zone de dossier (62) de la coque de siège (6) indépendamment l'un de l'autre.
  2. Fauteuil selon la revendication 1, caractérisé en ce que
    a) une première unité de ressort (4) est prévue, qui agit contre les supports tubulaires mobiles respectifs (3) ; et
    b) montée en parallèle par rapport à la première unité de ressort (4),une deuxième unité de ressort (5) est prévue, qui s'appuie d'un côté sur la base (2) dans un palier de butée fixe (221) et qui agit d'un autre côté contre les supports tubulaires mobiles respectifs (3).
  3. Fauteuil selon l'une des revendications 1 et 2, caractérisé en ce que
    a) la première unité de ressort (4) est réglable et comprend deux premiers éléments de ressort séparés (40) ;
    b) la deuxième unité de ressort (5) comprend deux deuxièmes éléments de ressorts séparés (51) ;
    c) la base (2) est un boîtier en forme de U (20) avec une partie intermédiaire (21) et deux branches (22) qui s'étendent depuis celle-ci à la manière de bras ;
    d) dans chacune des branches (22) se trouve un deuxième élément de ressort (51) ; et
    e) le premier axe de rotation (D1) s'étend à travers la partie intermédiaire (21), tandis que le deuxième axe de rotation (D2) s'étend à travers les extrémités libres des deux branches (22).
  4. Fauteuil selon la revendication 1, caractérisé en ce que
    a) la coque de siège (6) comprend deux longerons (60), qui s'étendent au-dessus de la zone d'assise (61) et de la zone de dossier (62) ;
    b) des organes de raccordement supérieurs (620) sont présents sur les deux longerons (60) dans la zone de dossier (62), à travers lesquels le troisième axe de rotation (D3) s'étend ;
    c) des organes de raccordement intermédiaires (610) sont présents sur les deux longerons (60) dans la zone d'assise (62), à travers lesquels un quatrième axe de rotation (D4) s'étend ; et
    d) entre les deux longerons (60) dans la zone d'assise (61) se trouve une première traverse (63), sur laquelle se trouvent des organes de raccordement avant (630) à travers lesquels le deuxième axe de rotation (D2) s'étend.
  5. Fauteuil selon la revendication 4, caractérisé en ce que
    a) la première traverse (63) est disposée à l'avant dans la zone d'assise (61) et une deuxième traverse (67) s'étend entre les deux longerons (60) derrière dans la zone d'assise (61) ;
    b) la zone de dossier (62) est couverte, entre les deux longerons (60), par un support de dossier (64) ;
    c) les deux longerons (60), les deux traverses (63, 67) et le support de dossier (64) forment la coque de siège (6) sous forme de composants assemblés ou la coque de siège (6) est fabriquée d'un seul tenant sous forme de pièce en plastique moulée ; et
    d) chaque longeron (60) présente, entre la zone d'assise (61) et la zone de dossier (62), une zone d'élasticité (68).
  6. Fauteuil selon l'une des revendications 1 à 5, caractérisé en ce que le fauteuil est équipé d'accoudoirs (7), parmi lesquels chaque accoudoir (7) est articulé d'un côté sur le troisième axe de rotation (D3) et d'un autre côté sur le quatrième axe de rotation (D4).
  7. Fauteuil selon la revendication 6, caractérisé en ce que
    a) chaque accoudoir (7) possède une zone d'appui (72) s'étendant en principe horizontalement depuis le troisième axe de rotation (D3) et une zone de support (71) s'étendant vers le haut depuis le quatrième axe de rotation (D4) ;
    b) entre la zone d'appui (72) et la zone de support (71) se trouve un passage (78) ;
    c) les accoudoirs (7) supportent, lors du déplacement du fauteuil dans l'inclinaison maximale de dossier (Rmax ) et l'inclinaison maximale d'assise (Smax), l'effet d'amortissement de la première unité de ressort (4) et de la deuxième unité de ressort (5) et supportent, lors du déplacement en retour en direction de la position de départ de l'inclinaison de dossier (R0 ) et de l'inclinaison d'assise (S0), la force de rappel des deux unités de ressort (4, 5) ; et
    d) les accoudoirs (7) sont fabriqués d'un seul tenant sous la forme d'une pièce en plastique moulée.
  8. Fauteuil selon l'une des revendications 1 à 7, caractérisé en ce que
    a) un cinquième axe de rotation fixe (D5) s'étend à travers la base (2), sur lequel est disposé un dispositif de pré-réglage (24) destiné au réglage de l'intensité de la première unité de ressort (4) ;
    b) le premier élément de ressort individuel (40) est un corps en forme de bloc en élastomère, qui est disposé au niveau de la jointure (30) d'un support tubulaire (3) respectif ;
    c) sur le dispositif de pré-réglage (24) le long du cinquième axe de rotation (D5), deux éléments de pressionpouvant coulisser (23) sont disposés, parmi lesquels un des éléments de pression (23) respectivement est attribué à un des premiers éléments de ressort (40) ; et
    d) les éléments de pression (23), par l'actionnement du dispositif de pré-réglage (24), peuvent être orientés selon un degré pouvant être choisi au niveau de la congruence sur les deux premiers éléments de ressort (40), afin d'obtenir l'amortissement souhaité conjointement avec l'action de la deuxième unité de ressort (5), lors du déplacement du fauteuil vers les inclinaisons maximales de dossier (Rmax ) et d'assise (Smax ) de façon correspondant aux proportions écrasées entre les jointures (30) et les éléments de pression (23) des premiers éléments de ressort (40).
  9. Fauteuil selon l'une des revendications 1 à 8, caractérisé en ce que
    a) les deuxièmes éléments de ressort (51) de la deuxième unité de ressort (5) sont des ressorts de compression hélicoïdaux ;
    b) chaque deuxième élément de ressort (51) comprend une pièce d'extrémité (52), qui présente un organe de fixation (53), qui reçoit une extrémité de l'élément de ressort (51) et ainsi forme un groupe de ressorts (50) ; et
    c) un sixième axe de rotation (D6) s'étend à travers les jointures (30) des deux supports tubulaires (3), sur lequel les pièces d'extrémité (52) des deux groupes de ressorts (50) sont articulées.
  10. Fauteuil selon l'une des revendications 1 à 9, caractérisé en ce que les longerons (60) de la coque de siège (6) possèdent une rainure longitudinale (66), dans laquelle une housse (69) peut être fixée afin de recouvrir la coque de siège (6).
  11. Fauteuil selon l'une des revendications 1 à 10, caractérisé en ce que, dans le châssis (1) se trouve un ressort pneumatique réglable en hauteur (12), sur lequel repose la base (2), afin de régler la coque de siège (6) à une hauteur correspondant aux besoins d'un utilisateur et de la concevoir rotative autour d'un axe vertical (V).
EP12780635.4A 2012-10-18 2012-10-18 Ajustage synchrone de siège Active EP2908696B2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2012/000238 WO2014059553A1 (fr) 2012-10-18 2012-10-18 Fauteuil permettant un réglage synchronisés entre les inclinaisons du dossier et de l'assise

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EP2908696A1 EP2908696A1 (fr) 2015-08-26
EP2908696B1 true EP2908696B1 (fr) 2017-12-06
EP2908696B2 EP2908696B2 (fr) 2023-03-15

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US (1) US10028586B2 (fr)
EP (1) EP2908696B2 (fr)
NO (1) NO2908696T3 (fr)
WO (1) WO2014059553A1 (fr)

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DE102016217502A1 (de) * 2016-09-14 2018-03-15 Sedus Stoll Ag Verbindungsanordnung für einen oder in einem Stuhl, Verfahren zur Herstellung einer Verbindungsanordnung, Stuhl
DE102016217503A1 (de) * 2016-09-14 2018-03-15 Sedus Stoll Ag Stuhl, insbesondere Konferenz- oder Bürostuhl, Verfahren zur Herstellung eines Stuhls
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US20150245714A1 (en) 2015-09-03
WO2014059553A1 (fr) 2014-04-24
EP2908696B2 (fr) 2023-03-15
EP2908696A1 (fr) 2015-08-26
US10028586B2 (en) 2018-07-24
NO2908696T3 (fr) 2018-05-05

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