EP0394307B1 - Chaise, notamment chaise de travail ou de bureau - Google Patents

Chaise, notamment chaise de travail ou de bureau Download PDF

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Publication number
EP0394307B1
EP0394307B1 EP89900186A EP89900186A EP0394307B1 EP 0394307 B1 EP0394307 B1 EP 0394307B1 EP 89900186 A EP89900186 A EP 89900186A EP 89900186 A EP89900186 A EP 89900186A EP 0394307 B1 EP0394307 B1 EP 0394307B1
Authority
EP
European Patent Office
Prior art keywords
toggle lever
rest
lever
backrest
lever arm
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
EP89900186A
Other languages
German (de)
English (en)
Other versions
EP0394307A1 (fr
Inventor
Siegfried Keusch
Günter Kratz
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.)
Haworth Buroeinrichtungen GmbH
Original Assignee
Roeder GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roeder GmbH filed Critical Roeder GmbH
Priority to AT89900186T priority Critical patent/ATE93696T1/de
Publication of EP0394307A1 publication Critical patent/EP0394307A1/fr
Application granted granted Critical
Publication of EP0394307B1 publication Critical patent/EP0394307B1/fr
Anticipated expiration legal-status Critical
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
    • 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
    • A47C7/402—Support for the head or the back for the back adjustable in height
    • 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
    • A47C1/03272—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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—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

Definitions

  • the invention relates to a chair, in particular a work or office chair, with a backrest bar which can be changed in inclination relative to the seat and a backrest which can be displaced thereon and which can be displaced in the direction of the seat by means of an adjusting device when the backrest bar is tilted backwards (EP-A-0 176 816)
  • the known chairs of this type offer excellent seating comfort, because on the one hand they provide a clear support for the back of the user in the starting or working position thanks to the practically vertical position of the backrest, but on the other hand they allow relaxed sitting after the backrest bar has been tilted backwards.
  • the backrest bar When the backrest bar is tilted backwards, the upper body of the user does not simply make a swiveling movement, but rather a movement superimposed from various movement components results. Since the backrest performs an additional downward movement towards the seat when the backrest bar is tilted backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.
  • EP-A-0 085 670, EP-A-0 176 816 A1 and DE-A-29 16 897 show, this compensation of the relative movement between the body of the user and the backrest can be constructive on different types of chairs different types can be solved.
  • the chair can be designed as a synchronous chair, in which a downward inclination of the seat support carrying the seat inevitably brings about a backward inclination of the backrest bar with a larger angle of inclination.
  • the seat support with the seat can also be guided to be extendable on the bearing block.
  • a complex and complex adjustment device is always required, which does not always work properly and reliably.
  • multi-link lever chains are used, as shown in EP-A-0 176 816, or, on the other hand, pairs of transmission levers and drive arches as shown in EP-A-0 085 870.
  • many parts are required for the adjustment device.
  • the same also applies to a chair according to DE-A-29 16 897, in which, when the seat is pulled out, the backrest on the backrest bar is displaced in the direction of the seat.
  • the adjusting device has only a single toggle lever, which is pivotally mounted about a horizontal pivot axis on a bearing bracket which supports the seat or on a seat bracket which is variable in inclination, that an extension of the backrest is articulated to the end of one lever arm of the toggle lever, that the end of the other lever arm of the toggle lever by means of a driver bolt or the like.
  • the backrest bar and / or the seat support is pivotable in such a way that when the backrest bar is tilted back and / or the seat support is lowered, the one lever arm of the toggle lever adjusts the extension and thus the backrest in the direction of the bearing block or seat support that the Hinge pin for the articulated connection between the one lever arm of the toggle lever and the extension between the horizontal pivot axis of the toggle lever and the pivot axis of the backrest bar is arranged on the bearing block or the seat support that in the starting position (steep) of the backrest bar s the one lever arm of the toggle lever such as the bracket or the seat bracket is directed approximately horizontally, that the driver pin is attached to the backrest bar and describes when the backrest bar reclines a path of motion that lies on a circular path around the pivot axis of the backrest bar on the bracket or the seat bracket , and that the driver pin is guided in a guide slot of the other lever arm of the toggle lever to compensate for the changing distance from the horizontal pivot axis of the toggle lever.
  • the adjustment device is limited to a single toggle lever on the fixed bearing block of the chair or is pivotally mounted on the seat support articulated to the bearing block.
  • the connection to the backrest is very simple, since an extension of the backrest is articulated directly on the one lever arm of the toggle lever.
  • the pivoting movement of the toggle lever and thus the sliding movement of the backrest on the backrest bar is initiated via the other lever arm of the toggle lever, the introduction being able to take place via the backrest bar itself or via the seat support which can be changed in inclination.
  • the articulation of the extension of the backrest on the toggle lever is solved according to one embodiment so that the extension of the backrest ends in a bearing sleeve which is rotatably mounted on a hinge pin of one lever arm of the toggle lever, and that the hinge pin of one lever arm of the toggle lever and that Articulated end of the extension during the pivoting movement of the toggle lever and the inclining movement of the backrest bar have a common path of movement, which lies on a circular path around the horizontal pivot axis of the toggle lever.
  • connection to the backrest is made according to one embodiment such that the extension of the backrest is rigidly connected by means of a connecting bracket with a slide that can be moved on or in the backrest rod or is formed integrally therewith.
  • the slider carries the backrest directly if there is no additional manual presetting of the backrest on the backrest bar.
  • driver pin is received by a sliding block which is slidably guided in the guide slot of the other lever arm of the toggle lever in order to obtain a low-noise sliding movement between the driver pin and the toggle lever.
  • the adjustment of the backrest on the backrest rod can be influenced and adapted to the requirements that the longitudinal central axis of the guide slot in the other lever arm from the horizontal pivot axis of the toggle lever in the direction of the hinge pin for the extension of the backrest of the one lever arm of the toggle lever is offset by a certain amount, and that the two lever arms of the toggle lever form an obtuse angle towards the base of the chair.
  • the driver pin is additionally adjustably guided in approximately horizontally running guide slots of the bearing bracket, so that when the seat bracket is lowered and the toggle lever is pivoted, the driver pin can be adjusted in relation to the seat bracket and the bearing bracket so that he can carry out his movement path around the pivot axis of the backrest bar on the seat support unhindered.
  • toggle lever is pivotally mounted on the backrest-side end of the bearing block
  • backrest rod is pivotally mounted on the bearing block between the horizontal pivot axis of the toggle lever and the pivot axis of the seat support and above the connecting line of these two pivot axes
  • the other lever arm adjustably receives the driving pin of the backrest rod in a guide slot and that the driving pin is additionally guided in approximately horizontal guide slots of the bearing block.
  • one lever arm of the toggle lever is below the other lever arm of the toggle lever is arranged, and that the two lever arms enclose an acute angle towards the backrest rod.
  • the backrest is attached to an adjustable slide on the slide, which can be locked in several positions on the slide, then the backrest can be adjusted to a basic position in the upright position of the backrest bar, which is adapted to the body size of the user is.
  • the adjustment path for the backrest that occurs when the backrest bar is tilted backwards is always based on the selected basic position of the backrest.
  • the manual change of the basic position of the backrest on the backrest rod is facilitated in that a spring with locking bolt is attached to the slide, which can be snapped into one of several holes in the slide, and that by means of a button which is arranged in the backrest rod, the spring can be deflected and so that the locking connection between the locking pin and the slide can be canceled.
  • the button When the button is pressed, the slide can be adjusted with the backrest on the slide. If the button is released, the locking bolt will snap into the next hole in the slide due to the tension of the spring.
  • the adjustment of the slide on the slide can be changed or influenced by the ratio of the distance of the driving pin to the pivot axis of the toggle lever to the distance of the hinge pin for the extension of the backrest to the pivot axis of the toggle lever, the adjustment of the slide on the backrest rod and thus the backrest can be determined is.
  • Fig. 1 shows schematically the parts of a chair that are required to compensate for the relative movement between the body of the user and the backrest. It is assumed that it is a single chair in which the seat is fixed to the bracket 2 connected to the column 1 of the base of the chair and only the backrest bar 6 can be changed in its inclination to the seat. To change the inclination of the Backrest bar 6 can be provided manually operated devices. However, the inclination can also be changed by shifting the weight of the user, whereby known inclination mechanisms with springs or the like can be used.
  • the backrest rod 6 is pivotally mounted on the pivot axis 16.
  • the backrest bar 6 is extended beyond the pivot axis 16 and carries the driving pin 25.
  • the toggle lever 20 is pivotally mounted to the knee side of the seat with respect to the pivot axis 16, as is shown with the horizontal pivot axis 19.
  • One lever arm 28 of the toggle lever 20 is oriented approximately horizontally in the starting position, ie when the backrest bar 6 is erected steeply, and points in the direction of the pivot axis 16 of the backrest bar 6.
  • the extension 17 of the hinge pin 22 is 35 indicated articulated backrest, which in the simplest case can be in one piece with the backrest 35.
  • the other lever arm 29 of the toggle lever 20 forms an obtuse angle with the one lever arm 28 of the toggle lever 20 towards the base of the chair.
  • a longitudinal guide slot 27 is made, in which the driver pin 25 can be adjusted. If the backrest bar 6 is moved to the rear, then the driving pin 25 describes a movement path about the pivot axis 16, which lies on a circular path.
  • the driver pin 25 takes the other lever arm 29 of the toggle lever 20 with it and pivots it counterclockwise.
  • the guide slot 27 is provided so that the driving pin 25 can be adjusted in the direction of the pivot axis 19 of the toggle lever 20. When pivoting the driving pin 25 counterclockwise, the distance to the pivot axis 19 becomes yes the toggle lever 20 smaller.
  • One lever arm 28 of the toggle lever 20 takes the extension 17 of the backrest 35 with it when it is pivoted, so that it is moved on the backrest rod 6 in the direction of the seat, as indicated by the arrows. It is important that when the backrest bar 6 is tilted backward, the end of the extension 17 and the hinge pin 22 of the one lever arm 28 of the toggle lever 20 move on a common path of movement, which is given by the circular path on which the hinge pin 22 moves about the pivot axis 19 of the toggle lever 20 moves. If this is ensured by appropriate design of the toggle lever 20, the backrest 35 can be rigidly coupled to the toggle lever 20 via the extension 17 and only the articulation of the extension 17 on the hinge pin 22 is required.
  • a synchronous chair is shown schematically, in which a lowering of the backrest bar 6 is forcibly connected with the lowering of the seat support 33, the pivoting angle of the backrest bar 6 being larger than the pivoting angle of the seat support 33.
  • the inclination of the seat carrier 33 can be changed about the horizontal pivot axis 4.
  • the toggle lever 20 is now pivotally mounted on the seat support 33 with its pivot axis 19.
  • the articulation of the extension 17 of the backrest 35 is again carried out via the hinge pin 22 on the one lever arm 28 of the toggle lever 20.
  • the driving pin 25 of the backrest bar 6 is again adjustably guided in the guide slot 27 of the other lever arm 29 of the toggle lever 20.
  • approximately horizontal guide slots 3 are provided in the bearing block 2, which additionally guide the driving pin 25. If the seat support 33 is adjusted downward, ie counterclockwise about the pivot axis 4, then the driving pin 25 is adjusted both in the guide slot 27 of the one lever arm 28 of the toggle lever 20 and in the guide slots 3 of the bearing block 2.
  • the toggle lever 20 is pivoted counterclockwise, which leads to a downward movement of the backrest 35 on the backrest bar 6.
  • the path of movement of the end of the extension 17 when the backrest bar 6 is tilted backwards and the path of movement of the hinge pin 22 on the one lever arm 28 of the toggle lever 20 are again matched to one another in such a way that they overlap. A rigid coupling between the extension 17 and the backrest 35 is thus possible again.
  • the spring arrangement of the chair and the inclination mechanism for the seat support 33 are not dealt with in more detail in connection with this invention, since these are of no importance for the adjustment device of the backrest and can be designed in a manner known per se.
  • a synchronous chair is shown schematically, in which an adjustment device with only a single toggle lever 20 is also used, but which is coupled in a different way with the backrest bar 6 and the bearing block 2 of the chair.
  • the seat support 33 is mounted on the knee-side end of the bearing block 2 so as to be pivotable about the horizontal pivot axis 4.
  • the backrest rod 6 is pivotally mounted about the horizontal pivot axis 16 and the toggle lever 20 is pivotably mounted about the horizontal pivot axis 19.
  • the pivot axis 16 of the backrest bar 6 lies between the pivot axes 4 and 19 and above the connecting line of the pivot axes 4 and 19.
  • the one lever arm 28 with the pivot pin 22 is connected to the backrest 35 via the extension 17, but this time it is below the other lever arm 29 and closes with this to the backrest bar 6 an acute angle.
  • the toggle lever 20 faces the backrest bar 6 and, in the guide slot of the other lever arm 29, again takes up the driving pin 25 of the backrest bar 6 in an adjustable manner.
  • the driving pin 25 is still adjustable in approximately horizontally directed guide slots 34 of the seat support 33, so that when the seat support 33 is lowered and when the backrest bar 6 is pivoted, the driving pin 25 can change the distance to the pivot axis 19 of the toggle lever 20 accordingly.
  • FIG. 4 and 5 an embodiment of the adjustment device for a chair according to FIG. 1 or FIG. 2 is shown in constructional details, the illustration being limited to the parts that are required for deriving the adjustment path of the backrest on the backrest bar 6 .
  • the toggle 20 either on the bearing block 2 or the seat support 33 can be pivotally mounted.
  • the pivot axis 19 is designed as a bearing pin which is mounted in the side legs of a bearing block 2 or seat support 33 which is U-shaped in cross section.
  • the opening 32 provides space for the toggle 20, so that the height of the bearing block 2 or the seat bracket 33 can be kept small.
  • the backrest bar 6 is also provided with side legs and is open towards the backrest.
  • the bearing block 2 or the seat support 33 projects between the side legs of the backrest bar 6 and is rotatably supported there by means of the pivot axis 16 designed as a bearing pin.
  • the bearing block 2 or the seat support 33 has a recess 31 in the bearing area through which the extension 17 is inserted and is articulated on the hinge pin 22 by means of the bearing sleeve 24.
  • the hinge pin 22 is arranged at the end of a lever arm 28 which, in the initial position of the chair, ie with the backrest bar 6 erected steeply, runs approximately horizontally, like the bearing block 2 or the seat support 33.
  • the driving pin 25 In the region of the backrest bar which is extended beyond the pivot axis 16 6, the driving pin 25 is fixed, which is received by a sliding block 26.
  • the sliding block 26 is adjustably guided in the guide slot 27 of the other lever arm 29 of the toggle lever 20.
  • the pivot pin 22 describes a movement path 30 which runs on a circular path about the pivot axis 19 of the toggle lever 20.
  • the coordination of the pivoting movement of the backrest rod 6 is now such that the bearing sleeve 24 of the extension 17 of the backrest describes a movement path which coincides with the movement path of the pivot pin 22 and is identical. Then it is achieved that the extension 17 can be rigidly connected to the parts carrying the backrest.
  • the distance between the pivot axes 16 and 19 on the bearing block 2 or on the seat support 33 is also a parameter which can be used to determine the adjustment path of the backrest.
  • the extension 17 can therefore be firmly connected to the slider 5 via the connecting bracket 23, the screw 15 and the spring ring 14, which is guided in the backrest bar 6 so as to be adjustable.
  • the driving pin 25 describes the movement path 36 which lies on a circular path about the pivot axis 16.
  • the other lever arm 29 of the toggle lever 20 is pivoted in the same direction of rotation by the driving pin 25.
  • the distance of the driving pin 25 from the pivot axis 19 of the toggle lever 20 changes.
  • the driving pin 25 received by the sliding block 26 is guided in a longitudinally adjustable manner in the guide slot 27 of the other lever arm 29 in order to be able to carry out its pivoting movement on the movement path 36 unhindered.
  • the cover 13 covers a part of the open side of the backrest bar 6 outside the adjustment range of the slide 10.
  • the driver pin 25 is additionally guided in an adjustable manner in guide slots 3 of the bearing block 2, as can be seen in FIG. 2.
  • the slide 10 is guided on the slide 5 in an adjustable manner.
  • the carriage 10 carries a horizontally directed tube section 9 to which the backrest is attached.
  • a spring 8 is arranged between the slide 5 and the slide 10 and is attached to the slide 10.
  • the sled 10 encloses the slide 5 and is supported with a cross leg on the side of the slide 5 facing the backrest, as shown in FIG. 5.
  • the cross leg carries the locking pin 11, which is locked in a bore 37 of the row of holes in the slide 5.
  • the button 12 On the side facing away from the backrest, the button 12 is arranged in the backrest bar 6 and is supported on the slide 5 via an elastic element 21 as a return spring.
  • the side of the elastic element 21 facing the slide 5 is covered with an adhesive film 18 which improves the sliding of the slide 5 on the elastic element 21.
  • the key 12 extends with extensions on both sides of the slider 5 to the slide 10 in the uppermost detent position and engages behind the spring 8, so that the spring 8 is deflected by pressing the key 12 and the detent connection between the detent pin 11 and the slider 5 can be canceled.
  • the backrest can therefore be brought manually into a basic position on the slide 5, which can be selected in the area of the slide 5 with the row of holes.
  • the adjustment path of the backrest predetermined by the toggle lever 20 is carried out, regardless of the selected basic position.
  • the slider 5 is guided on damping elements 7, which are inserted in the backrest rod 6 and prevent adjustment noises when the slider 5 is adjusted.
  • the cover 13 covers the side of the backrest bar 6 facing the backrest at least outside the slide 10, taking into account the maximum adjustment path of the slide 10, which results from the manual adjustment on the slide 5 and the adjustment path of the slide 5.

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  • 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)

Abstract

Une chaise, notamment une chaise de travail ou de bureau, possède une barre de dossier dont l'inclinaison par rapport au siège peut être réglée, ainsi qu'un dossier qui coulisse sur sa barre et qui peut coulisser en direction du siège au moyen d'un dispositif de réglage lorsque la barre de dossier est inclinée vers l'arrière. Un dispositif de réglage simple convenant aux types de chaises les plus divers comprend un seul levier à genouillère (20) qui est monté pivotant autour d'un axe de pivotement horizontal (19), sur un support (2) portant le siège ou bien sur un support de siège (33) monté sur le support (2) et présentant une inclinaison variable. Une rallonge (17) du dossier (35) est reliée de manière articulée à l'extrémité d'un bras de levier (28) de la genouillère (20), et l'extrémité de l'autre bras de levier (29) de la genouillère (20) peut pivoter au moyen d'une broche d'entraînement (25) ou similaire de la barre de dossier (6) et/ou du support de siège (33), de telle manière que lorsque la barre de dossier (6) est inclinée vers l'arrière et/ou que le support de siège est abaissé, un bras de levier (28) de la genouillère (20) règle la rallonge (17) et par conséquent le dossier (35) en direction du support (2) ou du support de siège (33).

Claims (12)

  1. Chaise, notamment chaise de travail ou de bureau, avec une tige de dossier (6) à inclinaison variable par rapport au siège et avec un dossier (35) pouvant être déplacé par glissement sur cette tige de dossier, dossier qui au moyen d'un dispositif de réglage peut être déplacé en direction du siège lors de l'inclinaison vers l'arrière de la tige de dossier ,
    caractérisée
    par le fait que le dispositif de réglage ne présente qu'un seul levier à genouillère (20) qui est monté à pivotement autour d'un axe d'articulation horizontal (19) sur un support (2) portant les sièges ou sur un porte-siège (33) à inclinaison variable sur le support (2),
    par le fait qu'un prolongement (17) du dossier (35) est relié par articulation à l'extrémité d'un bras de levier (28) du levier à genouillère (20),
    par le fait que l'extrémité de l'autre bras de levier (29) du levier à genouillère (20) est articulée au moyen d'une broche d'entraînement (25) ou similaire de la tige de dossier (6) et/ou du porte-siège (33) de manière telle que lors de l'inclinaison vers l'arrière de la tige de dossier (6) et /ou lors de la descente du porte-siège, un bras de levier (28) du levier à genouillère (20) déplace le prolongement (17) et dès lors le dossier (35) en direction du support (2) ou du porte-siège (33),
    par le fait que la broche d'articulation (22) pour la liaison par articulation entre un bras de levier (28) du levier à genouillère (20) et le prolongement (17) est disposée entre l'axe d'articulation horizontal (19) du levier à genouillère (20) et l'axe d'articulation (16) de la tige de dossier (6) sur le support (2) ou le porte-siège (33),
    par le fait que dans la position d'origine (verticale) de la tige de dossier (6), un bras de levier (28) du levier à genouillère (20), tout comme le support (2) ou le porte-siège (33) est de direction sensiblement horizontale,
    par le fait que la broche d'entraînement (25) est disposée sur la tige de dossier (6) et décrit, lors de l'inclinaison vers l'arrière de la tige de dossier (6), une trajectoire (35) correspondant à un cercle autour de l'axe d'articulation (16) de la tige de dossier (6) sur le support (2) ou le porte-siège (33),
    et par le fait que pour la compensation de la distance variable à l'axe d'articulation horizontal (19) du levier à genouillère (20), la broche d'entraînement (25) est guidée de manière réglable dans une fente guidage (27) de l'autre bras de levier (29) du levier à genouillère (20).
  2. Chaise suivant la revendication 1,
    caractérisée
    par le fait que le prolongement (17) du dossier (35) se termine par une douille de palier (24) qui est montée à rotation sur la broche d'articulation (22) d'un bras de levier (28) du levier à genouillère (20), et
    par le fait que lors du mouvement de pivotement du levier à genouillère (20) et du mouvement d'inclinaison de la tige de dossier (6), la broche d'articulation (22) d'un bras de levier (28) du levier à genouillère (20) et l'extrémité articulée du prolongement (17) présentent une trajectoire commune (30) située sur un cercle autour de l'axe d'articulation horizontal (19) du levier à genouillère (20).
  3. Chaise suivant l'une ou l'autre des revendications 1 et 2,
    caractérisée
    par le fait que le prolongement (17) du dossier (35) est, au moyen d'une patte de liaison (23), relié rigidement à un coulisseau (5), pouvant être déplacé par glissement sur la tige de dossier (6) ou à l'intérieur de cette tige, ou est fabriqué en une pièce avec ce coulisseau (5).
  4. Chaise suivant la revendication 1,
    caractérisée
    par le fait que la broche d'entraînement (25) est contenue dans une pièce baladeuse (26) qui est guidée à glissement dans la fente de guidage (27) de l'autre bras de levier (29) du levier à genouillère (20).
  5. Chaise suivant l'une quelconque des revendications de 1 à 4,
    caractérisée
    par le fait que l'axe médian longitudinal de la fente de guidage (27) dans l'autre bras de levier (29) est décalé d'une distance déterminée de l'articulation horizontale (19) du levier à genouillère (20) en direction de la broche d'articulation (22) pour le prolongement (17) du dossier (35) d'un bras de levier (28) du levier à genouillère (20), et
    par le fait que les deux bras de levier (28,29) du levier à genouillère (20) forment un angle obtus en direction de la surface de pose de la chaise.
  6. Chaise dans l'une quelconque des revendications de 1 à 5,
    caractérisée
    par le fait que dans le cas d'un porte-siège (33) articulé sur un support (2) et à inclinaison variable, la broche d'entraînement (25) est, en complément, guidée de manière réglable dans des fentes de guidage (3) sensiblement horizontales du support (2).
  7. Chaise suivant la revendication 1,
    caractérisée
    par le fait que le levier à genouillère (20) est monté à pivotement sur l'extrémité côté dossier du support (2), par le fait qu'entre l'axe d'articulation horizontal (19) du levier à genouillère (20) et l'axe d'articulation (4) du porte-siège (33), la tige de dossier (6) est montée sur le support (2) et est montée à articulation autour de la ligne de raccordement de ces deux axes d'articulation (4 et 19), sur le support (2)
    par le fait que l'autre bras de levier (29) reçoit la broche d'entraînement (25) de la tige de dossier (6) à glissement dans une fente de guidage (27), et
    par le fait qu'en complément, la broche d'entraînement (25) est guidée dans des fentes de guidage sensiblement horizontales (34) du support (2) (Fig. 2).
  8. Chaise suivant la revendication 7,
    caractérisée,
    par le fait qu'un bras de levier (28) du levier à genouillère (20) est disposé au-dessous de l'autre bras de levier (29) du levier à genouillère (20), et par le fait que les deux bras de levier (28, 29) forment un angle aigu avec la tige de dossier (6).
  9. Chaise suivant l'une quelconque des revendications de 1 à 8,
    caractérisée
    par le fait que le dossier (35) est fixé à un chariot (10) réglable sur le coulisseau (5), chariot (10) qui peut être bloqué dans plusieurs positions sur le coulisseau (5).
  10. Chaise suivant la revendication 9,
    caractérisée
    par le fait que sur le chariot (10) est disposé un ressort (8) avec une broche d'encliquetage (11) laquelle peut être encliquetée dans l'une des multiples forures (37) du coulisseau (5), et
    par le fait qu'au moyen d'une manette (12) disposée dans la tige de dossier (6), le ressort (8) peut être décliqueté de telle sorte que la liaison par encliquetage entre la broche d'encliquetage (11) et le coulisseau (5) est supprimée.
  11. Chaise suivant la revendication 9 ou 10 ,
    caractérisée
    par le fait que la manette (12) s'appuie au moyen d'un élément élastique sur le coulisseau (5) et fait fonction de ressort de rappel, et est prolongée jusque derrière le ressort (8).
  12. Chaise suivant l'une quelconque des revendications de 1 à 11,
    caractérisée
    par le fait que, par le choix du rapport de la distance de la broche d'entraînement (25) à l'axe d'articulation (19) du levier à genouillère (20) d'une part à la distance de la broche d'articulation (22) pour le prolongement (17) du dossier à l'axe d'articulation (19) du levier à genouillère (20) d'autre part, il est possible de déterminer la course de réglage du coulisseau (5) sur la tige de dossier (6) et dès lors sur le dossier.
EP89900186A 1987-12-29 1988-12-10 Chaise, notamment chaise de travail ou de bureau Expired - Lifetime EP0394307B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89900186T ATE93696T1 (de) 1987-12-29 1988-12-10 Stuhl, insbesondere arbeits- oder buerostuhl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3744365A DE3744365C3 (de) 1987-12-29 1987-12-29 Stuhl, insbesondere Arbeits- oder Bürostuhl
DE3744365 1987-12-29

Publications (2)

Publication Number Publication Date
EP0394307A1 EP0394307A1 (fr) 1990-10-31
EP0394307B1 true EP0394307B1 (fr) 1993-09-01

Family

ID=6343762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89900186A Expired - Lifetime EP0394307B1 (fr) 1987-12-29 1988-12-10 Chaise, notamment chaise de travail ou de bureau

Country Status (6)

Country Link
US (1) US5193880A (fr)
EP (1) EP0394307B1 (fr)
JP (1) JPH03504443A (fr)
CA (1) CA1311184C (fr)
DE (2) DE3744365C3 (fr)
WO (1) WO1989006100A1 (fr)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838999A1 (de) * 1988-11-18 1990-05-23 Roeder Gmbh Stuhl, insbesondere arbeits- oder buerostuhl
US6015189A (en) * 1991-11-05 2000-01-18 Genus Medical Inc. Adjustable chair
US5630650A (en) * 1994-03-30 1997-05-20 Steelcase Inc. Vertically adjustable back construction for seating
ES2085178T3 (es) * 1994-08-12 1996-05-16 Steelcase Strafor Sa Nueva estructura para asientos de oficina.
NO306753B1 (no) * 1995-12-18 1999-12-20 Opsvik Peter As Reguleringsanordning for stol
US6007150A (en) 1998-03-08 1999-12-28 Milsco Manufacturing Company Motorcycle seat with adjustable backrest
DE19901076A1 (de) * 1999-01-14 2000-07-20 Moll Sys & Funktions Moebel Stuhl
DE10037327A1 (de) * 2000-07-29 2002-02-14 Keiper Gmbh & Co Fahrzeugsitz mit neigungseinstellbarem Sitzkissen
US6820934B2 (en) * 2000-11-09 2004-11-23 Michigan Tube Swagers & Fabricators, Inc. Chair having flexible back support
US6471293B2 (en) 2000-11-09 2002-10-29 Michigan Tube Swagers & Fabricators, Inc. Stackable chair with flexible back support
WO2002071899A1 (fr) * 2001-03-14 2002-09-19 Guadalupe Sandra Morano Guzman Mecanisme inclinable pour sieges
US6805412B2 (en) * 2001-08-30 2004-10-19 Burgess Furniture Ltd. Stackable chair with flexible back
TW582241U (en) * 2002-12-23 2004-04-01 R-Shuen Liau Improved structure for adjusting height and position of backrest of chair
US7237841B2 (en) * 2004-06-10 2007-07-03 Steelcase Development Corporation Back construction with flexible lumbar
US7458637B2 (en) * 2004-06-10 2008-12-02 Steelcase Inc. Back construction with flexible lumbar
US7396079B2 (en) * 2005-03-08 2008-07-08 Steelcase Inc. Seating with shape-changing back support frame
TWM378690U (en) * 2009-12-01 2010-04-21 Chi Bo Industry Co Ltd Machine capable of adjusting gap between seat pad and back cushion
US9706845B2 (en) 2012-09-20 2017-07-18 Steelcase Inc. Chair assembly
USD697726S1 (en) 2012-09-20 2014-01-21 Steelcase Inc. Chair
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US9131775B1 (en) * 2012-12-05 2015-09-15 Joel H. Eisenberg Adjustable seating
EP3217844A1 (fr) * 2014-11-13 2017-09-20 L&P Property Management Company Mécanisme d'inclinaison pour siège sensible au poids
US9745066B2 (en) 2015-09-03 2017-08-29 Ami Industries, Inc. Adjustable seat assembly
US9596941B1 (en) 2016-02-02 2017-03-21 Office Master Inc. Chair back with height and lumbar adjustment
US9848707B1 (en) * 2016-07-28 2017-12-26 Ergo-Industrial Seating Systems, Inc. Telescoping mechanism
KR102270286B1 (ko) * 2016-09-01 2021-06-29 유이 퍼니쳐 컴퍼니., 리미티드. 의자 구조 및 의자
US11197548B2 (en) * 2019-12-16 2021-12-14 Allseating Corporation Reclining control system for a chair

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB593542A (en) * 1945-06-04 1947-10-20 Alfred Ernest Miller Improvements in convertible seats, couches and the like
GB173772A (en) * 1921-01-04 1922-12-14 Albert Edwin Gell Improvements in reclining adjustable chairs and seats
US2471024A (en) * 1946-10-04 1949-05-24 Roy A Cramer Chair with tilting back and automatically shiftable seat
US2558171A (en) * 1946-11-22 1951-06-26 George B Chesley Reclining chair
US2517626A (en) * 1947-09-20 1950-08-08 Berg Solomon Hollow repair device for leaky boiler tubes
US3632165A (en) * 1970-08-03 1972-01-04 Wilbur D Miller Auxiliary car seat
DE2335586A1 (de) * 1973-01-29 1975-01-30 Fritz Kerstholt Sitz- und/oder liegemoebel mit bewegbarem rueckenteil
DE7912182U1 (de) * 1979-04-07 1980-03-27 Zapf, Otto, 6240 Koenigstein Sitzmoebel
DE8025516U1 (de) * 1980-09-24 1981-01-15 Zapf, Otto, 6240 Koenigstein Sitzmoebel
ATE12168T1 (de) * 1981-08-19 1985-04-15 Giroflex Entwicklungs Ag Stuhl.
CH666171A5 (de) * 1984-10-03 1988-07-15 Giroflex Entwicklungs Ag Stuhl mit rueckwaerts neigbarem sitz- und rueckenlehnentraeger.
DE3744363A1 (de) * 1987-12-29 1989-07-13 Roeder Gmbh Stuhl, insbesondere arbeits- oder buerostuhl

Also Published As

Publication number Publication date
DE3744365C3 (de) 1994-04-14
DE3883781D1 (de) 1993-10-07
CA1311184C (fr) 1992-12-08
DE3744365C2 (fr) 1990-05-17
EP0394307A1 (fr) 1990-10-31
DE3744365A1 (de) 1989-07-13
US5193880A (en) 1993-03-16
JPH03504443A (ja) 1991-10-03
WO1989006100A1 (fr) 1989-07-13

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