EP0296578B1 - Siège pour chaise de bureau ou analogue avec siège et dossier réglables, notamment par déplacement du poids du corps - Google Patents

Siège pour chaise de bureau ou analogue avec siège et dossier réglables, notamment par déplacement du poids du corps Download PDF

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Publication number
EP0296578B1
EP0296578B1 EP88109991A EP88109991A EP0296578B1 EP 0296578 B1 EP0296578 B1 EP 0296578B1 EP 88109991 A EP88109991 A EP 88109991A EP 88109991 A EP88109991 A EP 88109991A EP 0296578 B1 EP0296578 B1 EP 0296578B1
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EP
European Patent Office
Prior art keywords
seat
back part
carrier
axis
joint
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.)
Expired - Lifetime
Application number
EP88109991A
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German (de)
English (en)
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EP0296578A1 (fr
Inventor
Horst Sondergeld
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Individual
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Individual
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Publication date
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Priority to AT88109991T priority Critical patent/ATE95044T1/de
Publication of EP0296578A1 publication Critical patent/EP0296578A1/fr
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Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • 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

Definitions

  • the invention relates to a seat of the type defined in the preamble of claim 1.
  • a seat of this type is known in particular from WO 83/03957.
  • a multi-link mechanism or cam control deflects a compressive force on the seat and back parts in such a way that the back parts are pressed against the back of the user with a certain force.
  • the invention has for its object to design the seat of the aforementioned type with simple means so that the angle of inclination of the seat and back parts by body weight shift of the user can be freely selected both individually and relatively to each other within a wide range.
  • the invention has the advantage that the angle of inclination of the seat part and the back part are absolutely freely selectable relative to one another and the seat can also be swiveled practically continuously between two extreme positions when the seat part is in a preselected relative position to the back part can.
  • a large number of intermediate positions can be produced between an extremely upright relative position up to a lying position, so that the user has great freedom of movement and choice.
  • a frame 1 with, for example, five star-shaped arms is provided as the supporting element of an office chair, at the ends of which wheels or rollers 2 are rotatably attached.
  • a tube 3 protrudes vertically upwards, in which an axis 4 of a U-shaped support 5 is rotatably mounted and, if necessary, adjustable in height.
  • the carrier 5 has a crosspiece 5a, preferably arranged perpendicular to the axis 4, and two legs fastened at its ends and preferably arranged parallel to the axis 4, which form support arms 5b and 5c, at the free ends of which armrests 5d, shown schematically, can be rigidly attached.
  • the crossbar 5a, the support arms 5b, 5c and the armrests 5d are preferably partially rigidly connected to one another or made from one piece.
  • the seat according to the invention is suspended from the carrier 5.
  • the seat consists of a seat part 6 and a back part 7, which at their rear or lower ends and preferably on both sides are rotatably or pivotally connected to one another by at least a first, freely floating joint 8, which e.g. has an axis projecting through the back part 7, the two ends of which protrude into the seat part 6.
  • the width of the seat is slightly smaller than the distance between the two support arms 5a, 5b.
  • the seat and back parts 6 and 7 have support elements at points spaced from the axis of rotation of the joint 8, which are movably suspended on the support 5 via positive guides.
  • 1, for example, consists of two articulated arms 10 and 11.
  • the articulated arm 10 is rotatable or pivotable on the one hand by a second articulation 12 with the support arm 5b or 5c and on the other hand by a support element in the form of a third articulation 13 - Or pivotally connected to the back part 7, wherein the axis of the joint 13 lies above the axis of rotation of the joint 8 (Fig. 1).
  • the articulated arm 11 is connected on the one hand to the support arm 5b or 5c by the second articulation 12 or a further, but having the same axis of rotation, and on the other hand by a support element in the form of a fourth articulation 14 to the seat part 6, wherein the axis of rotation of the joint 14 according to FIG. 1 is arranged between the axis of rotation of the joint 8 and the free front end of the seat part 6.
  • a support element in the form of a fourth articulation 14 to the seat part 6, wherein the axis of rotation of the joint 14 according to FIG. 1 is arranged between the axis of rotation of the joint 8 and the free front end of the seat part 6.
  • the second joints 12 are each fixed to an associated support arm 5b or 5c, that is to say immovably, so that on both sides of the seats, joint quadrilaterals consisting of joints 8, 12, 13 and 14 are formed, each joint 12 being one represents a fixed pivot around which the moving parts of the seat mechanism can move in a variety of ways. Since the quadrilaterals on both sides of the seat can be mirror images, only the quadrilateral shown in FIG. 1 and its function are described below.
  • the joint 8 is at a distance of 200 mm from the surface of the still upholstered seat part 6 when the same is arranged horizontally and when the back part 7 is arranged vertically.
  • the distances between the axes of rotation of the joints 12 and 13 are approximately 170 mm, the distances between the axes of rotation of the joints 12 and 14 approximately 190 mm, the distances between the axes of rotation of the joints 8 and 14 approximately 170 mm and the distances between the axes of rotation of the joints 8 and 13 approximately 150 mm. All of these distances have proven ergonomically advantageous, but can also be varied within certain limits.
  • the back part 7 In order to prevent the back part 7 from buckling when in an extreme lying position, it has a stop 15 which interacts with the seat part 6 and permits a maximum angle of 180 ° between the latter and the back part.
  • the possible adjustments of the seat part 6 and the back part 7 by means of the four-bar linkage are shown schematically in FIG. 2 for a large number of different sitting positions.
  • These seating positions are possible in that the axes of the joints 13 and 14 can be moved individually or both in combination along cylindrical surfaces, the axes of which coincide with the axis of rotation of the second joint 12.
  • the articulated arms 10 and 11 represent constrained guides that define the radii for the curved movements of the joints 13 and 14.
  • the joint 8 is kept freely suspended, which is why the angle of inclination of one of the parts 6, 7 can also be kept constant and only the angle of inclination of the other part 6, 7 can be changed.
  • the back or seat parts 7 and 6 can also be spatially fixed.
  • the articulated arms 10, 11 are additionally guided on the carrier 5.
  • the articulated arms 10 and 11 are rigidly connected with fastening arms 16 and 17, which are shown in FIG. 1 in a purely schematic manner.
  • the fastening arm 16 is connected to the articulated arm 10, extends in the direction of the articulated arm 11 and is circular.
  • the fastening arm 17 is connected to the articulated arm 11, extends in the direction of the articulated arm 10 and is designed in the form of a circular arc. In both cases, the center point of the circular arc lies on the axis of rotation of the second joint 12.
  • both fastening arms 16, 17 according to FIG. 1 can be connected to a common clamping element 18, e.g. a clamping screw or the like, are determined or released to change the seating position, i.e. form a locking device assigned to the positive guides, since the distances of the different parts of the fastening arms 16, 17 from the clamping screw 18 do not change when producing the possible seating positions.
  • a common clamping element 18, e.g. a clamping screw or the like are determined or released to change the seating position, i.e. form a locking device assigned to the positive guides, since the distances of the different parts of the fastening arms 16, 17 from the clamping screw 18 do not change when producing the possible seating positions.
  • each fastening arm 16, 17 could be assigned its own clamping screw 18.
  • the articulated arms 10, 11 are parts of a disk 19 and 20, respectively.
  • the joints 12, 13 are schematic and 14 and their connection points with the disks 19, 20 indicated.
  • Each disc 19, 20 has an elongated hole in the form of an arcuate slot 21 or 22, the axis of rotation of the second joint 12 in turn running through the centers of the arcs.
  • the radii of the arcs of the slots 21 and 22 are identical.
  • both disks 19, 20 are so large that they lie against one another over a wide area in all desired seat positions that can be produced.
  • the support arm 5b and 5c has, as shown in FIGS.
  • the joints 8 are in turn freely suspended.
  • the bolt 23 has an outer head 24 which comes to rest on the outside of a lever 26 which bears against the support arm 5c.
  • the disc 20 bears on the inside of the support arm 5c and the disc 19 bears on the inside thereof, the bolt 23 also projecting through the slots 21 and 22, respectively.
  • a clamping member 25 is fastened, which comes to lie between the inside of the disc 19 and the seat and, together with the discs 19, 20, forms a locking device for the positive guidance.
  • a corresponding arrangement is provided on the other support arm 5b.
  • the clamping member 25 is e.g.
  • a particular advantage of the washers 19, 20 and slots 21, 22 is that by preselecting the length of the slots, the adjustment range of the seat can be determined because the pin 23 strikes at least one end of the slots 21, 22 in the extreme sitting positions .
  • the slot length therefore also defines the extreme positions of the seat part 6 and the back part 7 at the same time.
  • the locking device according to FIG. 3 has the two-armed lever 26 on both sides of the seat, which lever, for example, on the outside of the associated Support arms 5b, 5c pivotally mounted and arranged parallel to them.
  • a lever arm is penetrated by a section of the bolt 23 located between the head 24 and the support arm 5b 5c.
  • the lever 26 is pivotably mounted on the support arm 5b, 5c by means of a roller 27 or the like.
  • One end of a rope 28 is attached to its other lever arm and extends between the two support arms 5b 5c or levers 26 (FIG. 3).
  • the upper lever arms in FIG. 3 of the lever 26 and with them the heads 24 of the bolts 23 are prestressed by spring force, which results in a mutual jamming of the disks 19, 20 on the support arms 5b 5c under the influence of the clamping members 25 .
  • the clamping members 25 can therefore also be designed, for example, as snap rings or the like. The respective sitting position is thus locked by clamping.
  • the spring 29 is tensioned by means of an actuating mechanism 30 by pulling it into the position indicated by the broken line in FIG. 3.
  • the cable 28 is relaxed and the spring force acting on the levers 26 is reduced so much that the clamping action between the disks 19, 20 and the support arms 5b, 5c is largely eliminated.
  • the spring 29 After release of the actuating mechanism 30, the spring 29 returns to its largely relaxed position, so that the locking is effective again.
  • the actuating mechanism 30 contains, for example, a Bowden cable 31, the pull cable 32 is fastened on the one hand to the spring 29 (FIG.
  • the axis 4 is connected to a U-shaped support 34, which is preferably perpendicular to the axis 4 arranged transverse web 34a and two legs fastened at its ends and expediently arranged parallel to the axis 4 in the form of preferably frame-shaped side parts 34b and 34c, the transverse web 34a, the side parts 34b and 34c and the axis 4 preferably being rigidly connected to one another in part or made in one piece are.
  • the side part 34c is designed like a half ring and has a lower, circular-arc-shaped frame part 35 which extends, for example, about a third of a circle.
  • One end of the frame part 35 is connected to the one end of a web 36, which runs essentially perpendicular to the axis 4 and at the same time can be designed as an armrest, while the other end of the frame part 35 is connected to the other end of the web 36 via a web 37 connected is.
  • the other side part 34b is designed accordingly.
  • the upper region of the side parts 34b, 34c formed from the webs 36, 37 can alternatively be designed freely or can also be omitted.
  • the seat designed according to FIGS. 1 to 5 has support elements at locations spaced from the joints 8, which consist, for example, of pins 38a, b provided on both sides of the seat part 6 and pins 39a, b attached to both sides of the back part 7, for example consist of the ends of axles or rotatable shafts 38 or 39 which project through the seat or back part 6 or 7 and which are arranged parallel to the axis of rotation of the joint 8.
  • the pins 38a, b each protrude into slots 40 which run in the form of a circular arc and are formed in front sections of the arcuate frame parts 35, while the pins 39a, b each project into slots 41 which run in the form of an arc of a circle and are formed in rear sections of the frame parts 35.
  • the lower boundaries of the slots 40, 41 act as control curves for the pins 38a, b and 39a, b lying thereon and guided by them, the axes of which are arranged essentially parallel to the axis of rotation of the joint 8.
  • the hinge 8 is in turn freely suspended, so that the pins 38a, b of the seat part 6 with the back part 7 held in the slots 40 or the pins 39a, b of the back part 7 with the seat part 6 held in the slots 41 to and fro can be.
  • a combined movement of both the seat part and the back part 6 or 7 is also possible.
  • the frame part 35 with its slots 40 and 41 thus constitutes a positive guide for the support elements of the seat or back part which are designed as pins 38a, b and 39a, b.
  • the pins 38a, b and 39a, b are also expediently cylindrical and therefore in the slots 40 and 41 rotatably mounted so that they can also rotate when adjusting the seat or back part.
  • FIG. 6 shows three different positions that the seat or back part 6 or 7 can assume, with solid, dotted or dashed lines Lines.
  • the length of the adjustment path is predetermined by the length of the slots 40, 41.
  • FIGS. 8 to 12 An embodiment of the invention similar to the embodiment according to FIGS. 6 and 7 is shown in FIGS. 8 to 12 in connection with a locking device.
  • the side parts 34b, 34c shown in FIGS. 6 and 7 are replaced by side parts 44 with an otherwise identical arrangement, which are designed in two parts and each have an outer part 45 and an inner part 46.
  • Both side parts 44 and with them the outer and inner parts 45 or 46 are preferably semi-ring-shaped and otherwise mirror images.
  • Each outer part 45 has an arcuate base part 47 and a guide part 48 arranged perpendicularly thereto, in which there are correspondingly shaped grooves 49a and 49b at those points where the slots 40, 41 are arranged in FIGS. 6 and 7.
  • the support elements shown in FIGS. 6 and 7 as simple pins 38a, b and 39a, b are designed here as gear wheels 52a, 52b, which are rotatably mounted on both sides of the seat or back part 6 and 7, respectively.
  • the gear wheels 52a, b are designed, for example, as external toothings at the ends of shafts 53 which are rotatably mounted in the seat or back part 6 or 7 and whose ends protrude laterally therefrom.
  • Short cylindrical guide pins 54 adjoin the gear wheels 52a, b on the outside.
  • the length of the shafts 53 between the two side parts 44 is dimensioned such that the guide pins 54 come to lie in the grooves 49a, b.
  • the bottom parts 47 have a corresponding control cam in the form of an internal toothing 55a or 55b, in which the gear wheels 52a, b engage and which run along circular arcs which correspond exactly to the circular arcs along which the grooves 49a, b run.
  • the gear wheels 52a, b can therefore roll on the corresponding internal gears 55a, b, the shafts 53 rotating simultaneously in the seat part 6 or back part 7 and the guide pins 54 being guided in the grooves 49a, b whose ends define the ends of the possible adjustment range.
  • the guide pins 54 and grooves 49a, b also prevent unwanted disassembly of the seat and back parts.
  • the adjustment mechanisms for the seat part 6 and the back part 7 are essentially identical.
  • the inner part 46 which in FIGS. 8 and 11 assumes its locking position, serves as the locking device.
  • the inner part 46 is also preferably semi-ring-shaped and designed in the manner of an angle profile and is provided with a lateral guide part 57 and an upper part 58, each of which has an inner toothing 59a or 59b which is opposite the inner toothing 55a, b and arranged parallel thereto.
  • the guide part 57 lies along a stepped recess provided in the guide part 48 of the outer part 45 from the outside and can be displaced radially relative to the latter.
  • the inner part 46 is made with the aid of at least one spring 60 or the like, which is only indicated schematically in FIGS. 8, 11 and 12 and is e.g. between the inner part 46 and the outer part 45, biased into the locking position shown in FIGS. 8 and 11, in which its internal teeth 59a, b are in engagement with the gear wheels 52a, b. In this locking position it is therefore impossible for the seat or back part 6 or 7 to be adjusted in one direction or the other. If, on the other hand, the inner part 46 is raised somewhat against the force of the spring 60, for this purpose there is sufficient free space 61 between the upper sections of the bottom or upper part 47 or 58 of the inner or outer part 46 or 45 (FIGS. 8 and 10).
  • the spring 60 can be designed such that it prevents the inner part 46 from being pulled away laterally from the outer part 45.
  • the internal toothing of the inner and outer parts 46 and 45 shown in FIGS. 8 to 12 can extend over the entire length of the bottom or upper parts 47 or 58 or only over the length of the grooves 49a, b corresponding sections. It is also possible to arrange the spring 60 or any additional springs between the inner part 46 and the outer part 45 in such a way that the inner part 46 can be moved such that only the gear wheels 52a of the seat part 6 or 52b of the back part 7 are released, which enables independent adjustment of the seat and back sections while locking the other section at the same time. After all, it would be too possible to form the inner part 46 in two parts and to assign one part to the seat part 6, the other part to the back part 7. It would also be possible to omit the inner parts 46 and instead, for example, selectively block or release the rolling movements of the gear wheels 52a, b with means not shown, for example arranged in the seat part.
  • the ends of the shafts 53, which are rotatably mounted in the seat or back part, can be replaced by rigid axles or pins, which are provided with gear wheels rotatably mounted on them.
  • FIGS. 8 to 12 has the particular advantage that the seat or back part 6 or 7 is positively guided at both lateral ends in such a way that the shafts 53 or the like due to the toothing cannot tilt or tilt at both ends, as would be conceivable with the positive guidance shown in FIGS. 6 and 7.
  • the distances of the pins 38a, b and 39a, b or of the gear wheels 52a, b in the embodiments according to FIGS. 6 to 12 from the joints 8 can be selected as for the distances between the joints 13 and 14 and the joints 8 the embodiment of FIGS. 1 to 5 is specified.
  • the radii of the arcs, along which the slots 40, 41 or grooves 49a, b run, can, on the other hand, be dimensioned according to the length of the articulated arms 10, 11 of the embodiment according to FIGS. 1 to 5.
  • a U-shaped support 64 which is preferably produced in one piece and which consists of a transverse web 64a and two perpendicularly arranged, preferably frame-shaped side parts 64b, 64c, is on the axis 4 in accordance with the other embodiments attached.
  • the side part 64c is semi-ring-shaped and has a lower, preferably circular-arc-shaped frame part 65 which, for example, consists of a profile bar with a rectangular, square, circular or tubular cross-section and extends, for example, over a third of a circle.
  • One end of the frame part 65 is connected to the one end of a web 66, which runs essentially perpendicular to the axis 4 and at the same time can be designed as an armrest, while the other end of the frame part 65 is connected to the other end of the web 66 via a web 67 connected is.
  • the other side part 64b is designed accordingly.
  • the upper region of the side parts 64b, c formed from the webs 66, 67 can alternatively be designed freely or can also be omitted.
  • the seat designed according to FIGS. 1 to 5 has support elements on both sides and at locations spaced from the joints 8, which consist, for example, of guide bodies 68 provided on both sides of the seat part 6 and guide bodies 69 arranged on both sides of the back part 7.
  • These guide bodies 68, 69 are rigidly attached to the ends of axles 70 and 71, which are rotatably mounted in the seat and back parts 6, 7, or are rotatably mounted on axles, which are rigidly mounted in the seat and back parts 6, 7, and each have a passage 68a or 69a (FIGS. 17, 18), which is penetrated by one of the frame parts 65.
  • the frame parts 65 are provided on their upper parts with control curves in the form of sliding surfaces 72 and on their undersides with external toothing 73a, 73b.
  • the passages 68a, 69a are delimited on their upper sides by sliding surfaces 74 shaped in accordance with the sliding surfaces 72 (FIG. 17) and on their undersides by inner toothings 75 shaped in accordance with the external toothings 73a, 73b, the spacing of which from the sliding surfaces 74 is somewhat greater than the spacing of the External teeth 73a, b of the sliding surfaces 72.
  • springs 76 are also supported, which normally, i.e.
  • the seat is loaded, for example by the weight of a person acting on the seat and / or back part 6, 7 and thus on the guide body 68 and / or 69, this results in a transverse movement of the respective guide body 68, 69 to the frame part 65 (Fig. 18).
  • the internal toothing 75 of the respective guide body 68, 69 is lifted off the external toothing 73a, b of the associated frame part 65, whereby an unlocking takes place, so that the seat and / or back part 6, 7 can now be moved as desired by parallel displacement of the sliding surfaces 72, 74 of the frame part 65 can be moved.
  • the frame parts 65 with their sliding surfaces 72 thus provide one hand Forced guidance for the support elements designed as guide bodies 68, 69 and, on the other hand, form a locking device with their external teeth 75.
  • a further locking device could be provided, so that the selected seating position can be locked even in the loaded state.
  • the springs 76 and the friction conditions are preferably selected such that an adjustment of the seating position is only possible with a certain minimum effort even in the loaded state and therefore not every slight movement of the body results in an adjustment of the seating position.
  • limiting means are preferably provided which, as in the other embodiments, limit the possible movement stroke of the guide bodies 68, 69 on the frame parts 65 and consist, for example, of pins attached to the guide bodies 68, 69 and engaging in grooves in the frame parts 65 or vice versa.
  • the sixth embodiment of the invention shown in FIGS. 19 to 23 contains, according to FIGS. 1 to 5, the seat and back parts 6 and 7 connected by at least one freely floating joint 8, the articulated arms 10 and 11 by the at least one second joint 12 are connected to the support arms 5b and 5c, not shown, and the third and fourth joints 13 and 14, which act as support elements.
  • the other parts are identical to the embodiment according to FIGS. 1 to 5, they are shown in FIGS. 19 to 23 omitted for simplicity.
  • the sixth embodiment differs from that according to FIGS. 1 to 5 in that the seat part 6 consists of two seat part sections 6a, 6b pivotally connected by the joint 14 and the back part 7 consists of two back part sections 7a, 7b pivotally connected by the joint 13 .
  • the joint 14 is expediently arranged approximately in the initial region of the thighs and the joint 13 approximately in the region of the lower lumbar vertebrae of a person of average size, so that the seat part section 6b supports most of the thighs and the back part section 7b supports most of the back and the parts 6a, 7a essentially form only one type of seat shell.
  • the seat and back sections 6a, 6b, 7a and 7b have at their ends and on both sides, for example, articulated eyes 81 to 86, while the articulated arms 10, 11 are provided at their ends with joint eyes 87 to 90, for example. All of these articulated eyes are schematically indicated in FIG. 20 by large circles and connected to one another by joints, continuous axes or the like in the manner shown in FIG. 19 to form the joints 13, 14.
  • the seat section 6b has at least one rigidly attached lever arm 91 at its end facing the seat section 6a and the seat section 6a has a rigidly attached lever arm 92 which is extended beyond the joint eyes 83, while the back section 7b accordingly has at least one end at its end facing the back section 7a rigidly attached lever arm 93 and the back section 7a is provided with at least one rigidly attached lever arm 94 projecting beyond the articulated eyes 84.
  • the free ends of the lever arms 91 to 94 are designed as articulated eyes 91a to 94a, which are indicated in FIG. 20 as small circles.
  • levers 95 and 96 are provided, which are provided at their ends with further articulated eyes 95a, b and 96a, b, also indicated by small circles.
  • the pivot eyes 95a with the articulated eyes 91a, the articulated eyes 95b with the articulated eyes 94a, the articulated eyes 96a with the articulated eyes 93a and the articulated eyes 96b with the articulated eyes 92a are used for further rotation with the help of pivot pins, continuous axes or the like - or swivel joints connected so that the arrangement shown in FIG. 19 results.
  • the seat section 6b is thus additionally articulated to the lever arm 94 of the back section 7a and the back section 7b is articulated to the lever arm 92 of the seat section 6a.
  • this has the consequence that, for example, when the articulated arm 11 or articulation 14 is held in place, a movement of the articulated arm 10 or articulation 13 not only causes the movements of the seat or back section 6a, 7a which can also be seen in FIGS. 1 and 2, but rather that in addition the levers 95, 96 bring about a relative pivoting of the seat sections 6a, 6b or the back sections 7a, 7b relative to one another about the axes of rotation of the joints 13 and 14.
  • the articulated arm 10 and the articulation 13 remain fixed in space and only the articulated arm 11 or the articulation 14 moves or both articulated arms 10, 11 and thus both articulations 13, 14 are moved relative to one another.
  • FIG. 19 shows a position in which the seat sections 6a, 6b on the one hand and the back sections 7a, 7b on the other hand each lie in the same plane.
  • the lengths of the lever arms 91 to 94 and the lever 95, 96 are e.g. chosen so that when the angle between the seat or back section 6a, 7a is increased, the rear sides of the back section 7a, 7b form a gradually increasing obtuse angle with one another. If the articulated arm 11 or the articulation 14 is simultaneously moved in the manner shown in FIGS. 21 to 23, then in the lying position according to FIG.
  • the back part 7a, 7b is not in one plane with the seat part 6a, 6b, but the seat and back sections 6a, 7a form a distinctly pronounced seat shell (FIG. 23) and the back section 7b is essentially parallel, but somewhat higher than the seat section 6b.
  • FIGS. 21 to 23 when lowering the back part 7a, 7b, simultaneous lifting of the seat part sections 6b intended for supporting the thighs can be avoided in a simple manner and without a significant shift in the center of gravity.
  • the seat section 6b is held in the same, preferably horizontal position in all positions of the seat (FIGS.
  • the part 7 serving as the backrest is gradually bent backwards during the transition from the sitting position into the lying position, which is preferred for ergonomic reasons, in particular if the joint 13 is arranged approximately at the level of the lower lumbar vertebrae.
  • a corresponding kinking of the part 6 serving as the seat surface finally leads to the fact that the seat shell formed from the sections 6a, 7a is arranged in an anatomically correct manner or is formed, in particular, during the transition to the lying position.
  • a lever mechanism can also be used to set up any other combination of sitting or lying positions that is considered appropriate.
  • the lever mechanism described with reference to FIGS. 19 to 23 can also be provided accordingly in the embodiments according to FIGS. 6 to 18, since it is unimportant for their application in which way the support elements formed by the joints 13, 14 or the like are worn or supported.
  • the invention is not restricted to the described embodiments, which can be modified in many ways.
  • the seat and back parts 6 and 7 of the described seat consist of plate-shaped components with rectangular or square cross sections, which are connected to one another by the first joints 8.
  • both parts can also be designed merely as tubular frames or the like, which serve to hold a continuous, flexible seat and backrest element, the surface of which is shaped in accordance with the ergonomically desired conditions.
  • Any upholstery or the like has been omitted from the drawing to simplify the illustration. Since the joints are freely suspended, they can alternatively be replaced by strips of material or the like made of a flexible material.
  • the radii of the arcs, along which the various support elements are positively guided, can be the same size according to FIGS. 6 to 18 or different sizes according to FIGS. 1 to 5 and 19 to 23.
  • this can be realized, for example in accordance with FIG. 24, by providing side parts 101, the two have frame parts 103a and 103b connected by a step 102, both of which run along circular arcs with different radii and are used, for example, to guide the guide bodies 68, 69 according to FIGS. 13 to 18.
  • side parts could be provided which are designed according to FIGS. 6 to 12 and whose slots 40, 41 or internal toothings 55a, b run along circular arcs with different radii.
  • FIG. 26 shows an exemplary embodiment in which tracks 111 and 112 defined by the positive guides for support elements 109 and 110 are not arcuate, but have a different course.
  • FIGS. 8 to 16 are further not limited to the toothings 55a, b and 59a, b described on the one hand and 73a, b and 75 on the other hand. Rather, these can also be replaced by braking surfaces with a sufficiently high frictional resistance, which are pressed against one another when the springs 60, 76 become effective and then prevent further adjustments of the seat or back parts.
  • the articulated arms 10, 11 it is not absolutely necessary for the articulated arms 10, 11 to be rotatable or pivotable about the same axis represented by the articulation 12. It would also be possible to mount the articulated arms 10, 11 rotatable or pivotable about different axes.
  • the center points of the movement paths formed by the control curves of the embodiments according to FIGS. 6 to 18, if they are circular paths, can lie on the same axis or also on different axes.
  • FIGS. 19 to 23 shows only the schematic structure of the lever mechanism, the lengths of the levers 95, 96 and lever arms 91 to 94 and the angles between the sections 6a, 6b or 7a, 7b and the lever arms 91 to 94 are only simplified and shown as examples. There are actually numerous possible variations for these lengths and angles, and they are preferably carefully coordinated with one another in order to follow or take account of the natural movement sequence of the human body. Since the levers 95 and 96 are predominantly subjected to tension, it is possible not to manufacture them from rigid, but from flexible materials, for example steel cables.
  • the user of the seat according to the invention can set a plurality of sitting or lying positions between an extreme sitting position ( c ⁇ 90 °) and an extreme lying position ( c ⁇ 180 °) and lock them if necessary using the described locking devices.
  • Another significant advantage of the invention is that the center of gravity of the seat always adjusts itself automatically above the pipe 3 or its axis 4 due to the gravity of the user, regardless of which special sitting or lying position is selected.
  • the positive guides for the seat part 6 are arranged essentially on one side and the positive guides for the back part 7 are arranged essentially on the other side of a plane passing through the axis 4 and parallel to the axis of rotation of the joint 8 runs.
  • the seat automatically adapts to the respective body weight of the user and that there are no forces working against the body weight, such as spring forces or the like.
  • Feathers or the like would have the disadvantageous consequence that the body of the user constantly works against a diffuse spring force and the spring force would have to be made adjustable with a great deal of design effort in order to be able to adapt it to the respective weight of the user.
  • the contact pressure of the back part is essentially generated by the body weight of the user, since it is dependent on the distribution of the weight of the user in the position assumed in each case. For this reason too, no additional forces, in particular springs or the like, are therefore required to pretension the back part in the direction of the back of the user.
  • the user is firmly and securely held in any seat or lying position by the combination of seat and back parts, since these do not spring back and no other forces occur apart from natural gravity. Due to the existing frictional forces, the seat is stabilized in such a way that the respective sitting position can be maintained permanently even without locking the seat or back part.
  • the mutually dependent opening angles to be selected in the different positions depend, in particular, on the particular application of the seat and are to be determined in such a way that all possible sitting or lying positions provide an ergonomically favorable body position.
  • the always horizontal position of the seat portion 6b can also be brought about without fixing it to the carrier in that the seat during the transition from the extreme sitting position to the extreme lying position is guided in the constrained guides so that the angle of inclination of the seat portion 6b does not change relative to the horizontal.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Claims (14)

  1. Siège pour chaise de bureau, ou analogue, avec un siège et un dossier (6,7) réglables, par déplacement du corps notamment, et avec un support (5, 34, 64), le siège (6) et le dossier (7), sur leurs extrémités tournées l'une vers l'autre, étant assemblés, avec une possibilité de pivotement, par une première articulation (8), au moins, librement oscillante, qui comporte un premier axe de rotation, et le siège (6), en un point distant de l'axe de rotation, étant suspendu et guidé sur le support (5, 34, 64), avec une possibilité de pivotement, au moyen d'un guidage forcé au moins, et étant monté avec une possibilité de déplacement le long d'une trajectoire, définie par le guidage forcé, caractérisé en ce que le dossier (7), en un point distant de l'axe de rotation, est suspendu et guidé sur le support (5, 34, 64), avec une possibilité de pivotement, au moyen d'un autre guidage forcé au moins, et est guidé avec une possibilité de déplacement le long d'une trajectoire, définie par l'autre guidage forcé, si bien que l'angle d'ouverture (c) entre le siège (6) et le dossier (7) peut être modifié, aussi bien par une variation simultanée de l'angle d'inclinaison du siège et du dossier, que par une variation de l'angle d'inclinaison du seul siège (6) ou du seul dossier (7).
  2. Siège suivant la revendication 1, caractérisé en ce que les guidages forcés ont une réalisation telle, que la combinaison du siège et du dossier peut pivoter dans son ensemble, avec un angle d'ouverture (c) constant.
  3. Siège suivant la revendication 1, caractérisé en ce que les trajectoires, définies par les guidages forcés, se composent de trajectoires circulaires avec des centres, situés sur l'axe (4) du support ou disposés à une faible distance de cet axe (4).
  4. Siège suivant la revendication 1, caractérisé en ce que les guidages forcés se composent de deux bras articulés (10, 11) au moins, respectivement assemblés avec le support (5), avec une possibilité de pivotement, par une deuxième articulation (12) au moins, et en ce que le siège et le dossier (6, 7) présentent respectivement un élément porteur au moins, qui se compose d'une troisième et/ou quatrième articulation (13, 14), assemblant le siège et le dossier (6, 7) avec l'un des bras articulés (10, 11), avec une possibilité de pivotement.
  5. Siège suivant la revendication 4, caractérisé en ce que les bras articulés (10, 11) sont respectivement des parties de plateaux (19, 20), s'appliquant en largeur et à plat l'un sur l'autre, et en ce que chaque plateau (19, 20) présente une fente (21, 22), qui s'étend le long d'un arc de cercle, au centre duquel passe l'axe de rotation de la deuxième articulation (12), et en ce que la fente (21, 22) est traversée par un organe de guidage maintenu sur le support (5).
  6. Siège suivant l'une des revendications 4 et 5, caractérisé en ce que la deuxième articulation (12) est fixée d'une manière stationnaire sur le support (5).
  7. Siège suivant la revendication 1, caractérisé en ce que les guidages forcés se composent de deux courbes de commande au moins, sur une partie latérale au moins (34b, 34c; 44; 64b, 64c), fixée sur le support (34, 64), et en ce que le siège (6) et le dossier (7) présentent respectivement un élément porteur au moins, avec un guidage forcé sur l'une des courbes de commande.
  8. Siège suivant la revendication 7, caractérisé en ce qu'une partie latérale (44), avec une courbe de commande au moins réalisée sous forme de denture intérieure (55a, 55b), est respectivement fixée sur le support (34) et sur les deux côtés du siège et/ou dossier (6, 7), et en ce que les éléments porteurs se composent de roues dentées (52a, 52b), guidées sur les dentures intérieures (55a, 55b) et prévues sur le siège et/ou dossier (6, 7).
  9. Siège suivant la revendication 8, caractérisé en ce que les parties latérales (44) se composent respectivement d'une partie externe (45), présentant les dentures intérieures (55a, 55b), et d'une partie interne (46), réalisée sous forme de dispositif de verrouillage pour les éléments porteurs, et en ce que les parties internes (46) présentent des dentures intérieures (59a, 59b), qui peuvent engrener avec les roues dentées (52a, 52b).
  10. Siège suivant la revendication 9, caractérisé en ce que les parties internes (46) sont précontraintes par élasticité dans une position de verrouillage, dans laquelle les dentures intérieures (59a, b) sont en prise avec les roues dentées (52a, 52b).
  11. Siège suivant la revendication 7, caractérisé en ce qu'une partie latérale (64b, 64c), avec une courbe de commande au moins réalisée sous forme d'élément de cadre (65), est respectivement fixée sur le support (64) et sur les deux côtés du siège et/ou dossier (6, 7), et en ce que les éléments porteurs se composent de corps de guidage (68, 69), montés avec une possibilité de déplacement sur les éléments de cadre (65), ces corps étant munis d'ouvertures (68a, 68b), traversées par les éléments de cadre (65) et limitées, sur un côté au moins, par des surfaces de glissement (74) concourant avec les éléments de cadre (65).
  12. Siège suivant la revendication 11, caractérisé en ce que des dentures extérieures (73a, 73b), prévues sur les faces inférieures des éléments de cadre (65), et des dentures intérieures (75), pouvant engrener dans ces dernières, forment un dispositif de verrouillage pour les éléments porteurs sur les parois des corps de guidage (68, 69), qui leur sont associées et limitent les ouvertures (68a, 68b).
  13. Siège suivant la revendication 12, caractérisé en ce que les dentures extérieures et intérieures (73a, b; 75) sont maintenues en prise par élasticité, lorsque le siège et/ou dossier (6, 7) n'est pas chargé, et sont désengrenées par une charge du siège et/ou dossier (6, 7).
  14. Siège suivant la revendication 1, caractérisé en ce que le siège (6) se compose de deux sections (6a, 6b), assemblées entre elles avec une possibilité de pivotement, et le dossier (7) de deux sections (7a, 7b), assemblées entre elles avec une possibilité de pivotement, l'une des sections (6a) du siège étant assemblée par l'articulation (8), avec une possibilité de pivotement, avec l'une des sections (7a) du dossier, et les sections du siège (6a, 6b) et les sections du dossier (7a, 7b) étant en outre assemblées et articulées par une mécanique de levier (91 - 96) de sorte que, lors du passage d'une position assise extrême à une position couchée extrême, les angles d'ouverture (d,e,f) entre les deux sections du siège (6a, 6b), entre les deux sections du siège et du dossier (6a, 7a,), assemblées avec une possibilité de pivotement, et entre les deux sections du dossier (7a, 7b), peuvent être élargis graduellement d'une manière définie par la mécanique de levier.
EP88109991A 1987-06-24 1988-06-23 Siège pour chaise de bureau ou analogue avec siège et dossier réglables, notamment par déplacement du poids du corps Expired - Lifetime EP0296578B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88109991T ATE95044T1 (de) 1987-06-24 1988-06-23 Sitz fuer einen buerostuhl od. dgl. mit einem insbesondere durch koerpergewichtsverlagerung verstellbaren sitz- und rueckenteil.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3720849 1987-06-24
DE3720849 1987-06-24
DE3800754A DE3800754A1 (de) 1987-06-24 1988-01-13 Sitz fuer einen buerostuhl od. dgl. mit einem insbesondere durch koerpergewichtsverlagerung verstellbaren sitz- und rueckenteil
DE3800754 1988-01-13

Publications (2)

Publication Number Publication Date
EP0296578A1 EP0296578A1 (fr) 1988-12-28
EP0296578B1 true EP0296578B1 (fr) 1993-09-29

Family

ID=25856897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109991A Expired - Lifetime EP0296578B1 (fr) 1987-06-24 1988-06-23 Siège pour chaise de bureau ou analogue avec siège et dossier réglables, notamment par déplacement du poids du corps

Country Status (4)

Country Link
US (1) US4861106A (fr)
EP (1) EP0296578B1 (fr)
AT (1) ATE95044T1 (fr)
DE (2) DE3800754A1 (fr)

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Also Published As

Publication number Publication date
DE3884472D1 (de) 1993-11-04
US4861106A (en) 1989-08-29
ATE95044T1 (de) 1993-10-15
EP0296578A1 (fr) 1988-12-28
DE3800754C2 (fr) 1992-04-02
DE3800754A1 (de) 1989-01-05

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