EP0635228B1 - Chair, particularly office chair - Google Patents

Chair, particularly office chair Download PDF

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Publication number
EP0635228B1
EP0635228B1 EP94110870A EP94110870A EP0635228B1 EP 0635228 B1 EP0635228 B1 EP 0635228B1 EP 94110870 A EP94110870 A EP 94110870A EP 94110870 A EP94110870 A EP 94110870A EP 0635228 B1 EP0635228 B1 EP 0635228B1
Authority
EP
European Patent Office
Prior art keywords
seat support
blocking
chair
support member
lever
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
EP94110870A
Other languages
German (de)
French (fr)
Other versions
EP0635228A1 (en
Inventor
Manfred Elzenbeck
Klaus Haar
Harald Nathmann
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.)
Dauphin Entwicklungs und Beteiligungs GmbH
Original Assignee
Friedrich W Dauphin GmbH and Co
Dauphin Entwicklungs und Beteiligungs 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 Friedrich W Dauphin GmbH and Co, Dauphin Entwicklungs und Beteiligungs GmbH filed Critical Friedrich W Dauphin GmbH and Co
Publication of EP0635228A1 publication Critical patent/EP0635228A1/en
Application granted granted Critical
Publication of EP0635228B1 publication Critical patent/EP0635228B1/en
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
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • 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
    • A47C1/03272—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

Definitions

  • the invention relates to a chair according to the preamble of claim 1.
  • Such a chair known from DE 27 33 322 C3 (corresponding to US Pat. No. 4,200,332), has a so-called synchronous mechanism in which the backrest and seat are pivoted simultaneously in a certain predetermined ratio.
  • the energy accumulator serves to enable an adjustment or pivoting of the backrest, which is done by the user pressing against the backrest.
  • the rear area of the seat is also lowered or raised when the backrest swings forward.
  • a length-adjustable gas spring is provided, which can be fixed in any length setting. The effort for this is great.
  • a chair of the generic type is known from EP 0 179 224 B1 (US Pat. No. 4,641,886), in which a gas spring whose length cannot be determined is used as the energy store, the housing of which can be clamped to one another in order to lock the position of the rear seat support part and the front seat support part .
  • This configuration is structurally relatively simple.
  • a chair with a seat is known from EP 0 105 180 B1, which has an articulated or flexible backrest connected to the seat. It is a spring that loads the backrest in the sense of a steep position intended.
  • a base frame is also provided, in which a horizontal, front bearing tube is arranged, on which the seat is supported in an articulated manner in the region of its front edge.
  • a rear, horizontal support shaft lying at a distance below the seat is mounted in the base frame, with which at least one support lever articulatedly supporting the backrest approximately at the lumbar height of the user is rigidly connected.
  • the backrest has at least one radially protruding cam.
  • a locking lever is articulated on the underframe, which is articulated by a transmission member to an actuating tube which rotates through the actuating lever and which passes through the front bearing tube and which can be pivoted as a lock into the movement path of the cam.
  • the bearing tube is provided with an elongated hole in the circumferential direction for the passage of a pin projecting radially from the actuating tube, to which the transmission member is articulated.
  • Two actuating tubes can be stored in the bearing tube, which can perform two functions.
  • the invention has for its object to design a chair of the generic type so that reliable and trouble-free and comfortable operation is ensured with the simplest structure.
  • the configuration according to claim 2 ensures that the locking occurs by pressing the stop surface against the locking surface. The locking is therefore possible in the most advanced position of the backrest.
  • FIG. 1 shows an office chair which has a chair frame 1. This is provided with a base frame 2, which is supported by rollers 3 against the floor. On the base 2, a height-adjustable chair column 4 is attached, at the upper end of which a seat support 5 is attached.
  • the seat support 5 is configured in two parts; it has a front seat support part 6, which is fastened on the chair column 4, and a rear seat support part 7, which is above the chair column 4 by means of a pivot axis 8 is articulated on the front seat support part 6.
  • a support tube 9 is fastened, which runs parallel to the pivot axis 8.
  • a seat 10 is supported on this support tube 9 shortly behind its front edge 11.
  • the seat 10 is supported in its rear area on a support axis 12 which is mounted in the rear seat support part 7.
  • a seat inclination adjustment device 13 can also be arranged on the rear seat support part 7.
  • a backrest support 14 which projects from this and on which a backrest 15 is attached.
  • a backrest height adjustment device 16 is provided.
  • the described design of the seat support 5 with the arrangement of the seat 10 and the backrest 15 forms a so-called synchronous mechanism.
  • a force changing device 17 is provided in order to be able to change the forces to be overcome when adjusting or rocking.
  • Armrests 18 are attached to the front edge 11 of the seat 10, specifically on the outer ends of the support tube 9, of which only one can be seen in the side view of FIG. 1.
  • two aligned bearing bushes 19, 19 ' are integrally formed with the front seat support part 6, in which two support tube sections 20, 20' forming the support tube 9 are in alignment with one another and in each case by means of a screw 21 rotatably and in the direction the axis 22 of the support tube 9 are held immovably.
  • the support tube sections 20, 20 ' only protrude outward beyond the bearing bushes 19, 19'.
  • Fig. 2 In Fig. 2 below is also indicated that the armrest 18 is provided at its lower end with a short holding sleeve 24 which is attached to the end of the support tube section 20 '.
  • the holding sleeve 24 In the holding sleeve 24 is a connected with this holding pin 25 which engages in the support tube section 20 '.
  • a screw not shown in the drawing, is provided to fix the holding sleeve 24 in the direction of the axis 22.
  • positioning projections (not shown in the drawing) are formed in the holding sleeve 24, which engage in recesses 26 formed at the end of the respective support tube section 20.
  • each support tube section 20, 20 ' an actuating shaft is pivotally mounted about the axis 22, which projects into the open space 23 at one end.
  • An actuating shaft 27 for a chair height adjustment is mounted in the support tube section 20 shown above in FIG. 2, while an actuation shaft 28 for the actuation of a synchronous mechanism is mounted in the support tube section 20 ′ shown in FIG. 2 below.
  • Each actuating shaft 27, 28 has at least one driving pin 29 running radially to the axis 22, which extends outwards through an elongated hole 30 in the respective support tube section 20 or 20 '.
  • the respective elongated hole 30 extends over part of the circumference of the respective support tube section 20, 20 ′, the maximum pivoting angle of the actuating shaft 27 or 28 about the axis 22 also being determined by the circumferential extent of the respective elongated hole 30. Only a driving pin 29 and an elongated hole 30 are shown in FIG. 2.
  • the actuation shafts 27, 28 are each pivoted by means of an operating lever 31 which has a push-in sleeve 32 and an actuating handle 33 attached to it.
  • an operating lever 31 which has a push-in sleeve 32 and an actuating handle 33 attached to it.
  • the tubular plug-in sleeve 32 is pushed onto the corresponding support tube section 20 or 20 ', with recesses 34 formed on the inside of the plug-in sleeve 32 coming into engagement with the driving pin 29.
  • the configuration of the operating lever 31 can be seen in FIG. 3.
  • the actuating handle 33 protrudes - on the axis 22 - on one side via the push-in sleeve 32, as can be seen in FIGS. 2 and 3.
  • the push-in sleeve 32 can be plugged onto the support tube section 20 'in such a way that the operating lever 31 projects outwards in the direction of the armrest 18, as shown in FIG. 2 below. If - as can be seen in FIG. 2 above - no armrest 18 is to be provided, then the operating lever 31 can be plugged onto the support tube section 20 in such a way that the actuating handle 33 projects in the direction of the adjacent bearing bush 19. In this case, the front end of the respective support tube section 20 having the recesses 26 only has to be closed with a cover cap. As can be seen from FIG.
  • an area of the respective support tube section 19 or 20 forming a bearing section 35 is left free between the respective bearing bush 19 'and the adjacent push-in sleeve 32.
  • the seat 10 is pivotally supported on these storage areas, as will be shown further below.
  • the chair column 4 has a generally known length-adjustable gas spring 36 which is held in a clamping manner in the form of a cone-shaped clamping device 37 of the front seat support part 6.
  • a valve actuation pin 38 protrudes upward from the gas spring 36 and when it is inserted into the gas spring 36 an existing valve is opened, thereby making it possible to adjust the length of the gas spring 36.
  • gas springs are generally known in practice and are shown and described, for example, in DE 18 12 282 C2 (corresponding to US Pat. No. 3,656,593).
  • a two-armed valve actuation lever is provided, which is pivotably supported against the pivot axis 8, as can be seen in FIG. 4.
  • a lever arm 40 of the lever 39 bears against the valve actuation pin 38, while the other lever arm 41 ends in the region of the open space 23.
  • a valve actuating arm 42 attached to the actuating shaft 27 for seat height adjustment, specifically to its section projecting into the open space 23, which projects approximately radially to the axis 22 from the actuating shaft 27. It engages with its free end the adjacent free end of the lever arm 41, so that when the actuating shaft is pivoted in such a way that the free end 43 is pivoted upward, the lever arm 40 of the Lever 39 is pivoted downward and pushes the valve actuating pin 38 into the gas spring 36. In Fig. 4 this pivoting takes place counterclockwise.
  • the pin 38 is reset by the gas pressure in the gas spring 36, as a result of which the lever 39 and thus the actuating shaft 27 are also reset in their initial position.
  • the seat 10 is snapped elastically onto the support tube sections 20, 20 'by means of latching sections 44 which partially encompass the bearing sections 35. Since the seat 10 together with the latching sections 44 is made in one piece from hard elastic plastic, this is readily possible.
  • the latching sections 44 are shown in particular in FIG. 6.
  • the seat 10 In its rear area, the seat 10 is supported on the support axis 12 which is mounted in approximately horizontally extending elongated holes 45 in the rear seat support part 7 and which extends parallel to the axis 22 and to the pivot axis 8.
  • the seat 10 is snapped onto this support axis 12 by means of latching openings 46 which are formed in webs 47 of the seat 10 which extend downward from the seat 10.
  • the elongated hole 45 in the rear seat support part 7 essentially enables the occurrence of such pivoting horizontal relative movements between the seat 10 and the rear seat support part 7, by the support axis 12 executing these movements in the elongated holes 45.
  • the backrest 15 is pivoted in accordance with the pivoting movements of the rear seat support part 7.
  • the seat 10 is pivoted about the stationary axis 22 due to the essentially vertical pivoting movements of the support axis 12 mounted in the rear seat support part 7.
  • 1, 4, 6 the geometric ratios of the horizontal spacing ratios of the axis 22 to the pivot axis 8, to the support axis 12 and to the backrest 15 show that when the rear seat support part 7 is pivoted, the backrest 15 by the 3rd to 4th -fold the angular amount compared to the seat 10 is pivoted.
  • a force accumulator 48 which in the exemplary embodiment shown is a prestressed helical compression spring 49.
  • This helical compression spring 49 is supported via a pivotable abutment 50 against the front seat support part 6 below the actuating shaft 28 in the open space 23. With its other end, the compression spring 49 is supported against a slide shoe 51 of the force changing device 17.
  • the sliding shoe 51 in turn bears against a sliding surface 52 which is formed on a lever arm 53 of the rear seat support part 7.
  • This lever arm 53 is formed in one piece with the rear seat support part and extends essentially downwards from the pivot axis 8.
  • the rear seat support part is designed as an angle lever.
  • the pivotable abutment 50 is provided with a rod 54 passing through the compression spring 49, on which the slide shoe 51 can also be displaced in the direction of the compression spring 49.
  • the force changing device 17 acts on the end of the rod 54 opposite the abutment 50. It has an adjusting screw 55 articulated on the rod 54, which engages in an adjusting nut 56 which is designed as part of a turning handle 57 and is rotatably mounted in a lower wall 58 of the front seat support part 6 but is non-displaceably in the direction of the adjusting screw 55.
  • the sliding surface 52 lies at least approximately on a circular arc section, the center point of which is formed by the swivel joint 59, the distance b between the swivel joint 59 and the intersection of the axis 60 with the sliding surface 52 is not or only slightly changed when the rotary handle 57 is rotated, so that the bias of the helical compression spring 49 does not change with such adjustments.
  • the force acting on the lever arm 53 by the compression spring 49 is therefore not changed; it is only by changing the distance a between the axis 60 and the pivot axis 8, the effective lever arm, that is to say in total the torque acting by the compression spring 49 on the rear seat support part 7 and thus on the seat 10 and the backrest 15. This torque is smaller the smaller the distance a is and vice versa.
  • This means that the adjustment forces to be applied to the rotary handle 57 can also be kept constant over the entire adjustment path of the slide shoe 51, since the frictional forces between the slide shoe 51 and the sliding surface 52 practically do not change.
  • a locking device 61 is provided.
  • This locking device 61 shown essentially in FIGS. 2 and 5, has a locking lever 62 which is attached to the lever arm 53 of the rear seat support part 7 by means of a pivot connection 63 and can be pivoted about an axis parallel to the pivot axis 8.
  • the swivel connection 63 is located in the lower region of the lever arm 53, and is therefore at a clear distance from the swivel axis 8.
  • the locking lever 62 is provided on its underside with an approximately perpendicular to its longitudinal direction stop surface 64, which is assigned a stationary locking surface 65.
  • This locking surface 65 is formed in the front seat support part 6, specifically in the area of the lower wall 58 thereof.
  • the locking surface 65 faces the pivot connection 63, whereas the stop surface 64 faces the locking surface 65.
  • the locking lever 62 has a fork-shaped end 66, under which a locking actuating arm 67 engages, which is T-shaped and is fixedly connected to the actuating shaft 28.
  • a crossbar 67a of the actuating arm 67 therefore engages under the fork-shaped end 66.
  • the actuating arm 67 protrudes radially from the section of the actuating shaft 27 located in the open space 23 in relation to the axis 22.
  • the locking actuating arm 67 is pivoted between a position shown in solid lines in FIG. 5 and a position shown in broken lines there. In the position shown in solid lines in FIG. 5, the locking actuating arm 67 lifts the Locking lever 62 so far that its stop surface 64 comes out of engagement with the locking surface 65. If the user of the chair now presses the backrest 15 back against the force of the compression spring 49, the fork-shaped end 66 of the locking lever 62 on the T-shaped actuating arm 67 can be displaced in the direction of the actuating shaft 27. So it is possible to rock freely with the synchronous mechanism.
  • the actuating shaft 28 is pivoted into the position shown in broken lines in FIG. 5 by means of the operating lever 31, the transverse web 67a of the T-shaped actuating arm 67 comes out of engagement with the fork-shaped end 66, so that the latter is connected to the locking surface 65 via one Guide pin 68 can fall.
  • This pivoting down of the locking lever 62 is only possible if the rear seat support part 7 is pivoted by the force of the compression coil spring 49 with a corresponding relief of the backrest 15 and the seat 10 into a position in which the backrest 15 and its front end position the seat 10 assumes its upper end position.
  • a continuous rod-shaped support axis 12 is not provided, but the support axis 12 ' formed by two pins 71, 71 ', which are held clamped in bearing parts 72 on the underside of the seat 10, so that they can also be retrofitted or, if necessary, pulled out again without destroying the seat 10. They are - as can be seen in FIGS. 7 and 8 - on both sides of the rear seat support part 7, so that they can pivot past the webs 47 thereof.
  • a rocker 73 designed in the manner of a double-armed lever is pivotably mounted on the seat support part 7 about a pivot axis 74.
  • the pivot axis 74 is inserted into openings 47a in the webs 47 of the rear seat support part 7. It also penetrates web-like bearing cheeks 73a which are formed on the underside of the rocker 73 facing the rear seat support part 7.
  • the pivot axis 74 can be held clamped in the webs 47 or the web-like bearing cheeks 73a.
  • the rocker 73 has two fork-shaped lever arms 75, 75 ', which are also located on both sides of the rear seat support part 7 and each engage a pin 71 or 71', so that when the rocker 73 is pivoted about the pivot axis 74 parallel to the pivot axis 8, the pins 71, 71 'can be changed in height.
  • the seat 10 in an otherwise fixed position from the rear seat support part 7 to the front seat support part 6, i.e. without simultaneous adjustment of the position of the backrest 15, the seat 10 is pivoted about the axis 22, so that its rear region 76 has a higher or lower position relative to the rear seat support part 7 occupies.
  • These swiveling of the rocker 73 are realized in a similar manner to the swiveling of the compression spring 49 of the force changing device 17.
  • an adjusting screw 78 is articulated which engages in an adjusting nut 79.
  • This is firmly connected to a rotary handle 80 which, together with the adjusting nut 79, is rotatably but immovably mounted in the direction of the adjusting screw 78 in an opening 81 in a wall 82 of the rear seat support part 7.
  • the adjusting screw 78 has at its end opposite the adjusting nut 79 a transverse web 83 which engages in elongated holes 84 of abutment webs 85 of the lever arm 77.
  • the adjusting nut 79 When mounting the seat inclination adjustment device 13, which is possible as an additional equipment, if necessary subsequently, the adjusting nut 79 is pushed from above through the opening 81 in the wall 82 and the rotary handle 80 is set against it from below; both parts are then connected with a screw 86.
  • the rocker 73 is connected to the rear seat support part 7 by inserting the pivot axis 74.
  • the support axis 12 is pulled out of the elongated holes 45.
  • the pins 71, 71 'are then inserted into the fork-shaped lever arms 75, 75'.
  • the seat 10 is connected to the front support tube 9 in that the latching sections 44 are elastically snapped onto the support tube sections 20, 20 ', on which they can be pivoted about the axis 22. The disassembly takes place accordingly.

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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)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Hydrogenated Pyridines (AREA)

Abstract

A chair, particularly office chair, has as so-called sychronizing mechanism a front seat carrier part (6), fixed in relation to a chair column, and a rear seat carrier part (7) which is pivotable with respect to said front seat carrier part about a pivot shaft (8) and carries a backrest. A seat is supported on the two seat carrier parts (6, 7). Articulated on the rear seat carrier part (7) at a distance from the pivot shaft (8) is a locking lever (62) of a locking device (61), which locking lever has a stop face (64). The latter comes into engagement under gravity with a locking face (65) fixed relative to the front seat carrier part (6). To release this locking arrangement, the locking lever (62) is lifted by means of an actuating arm (67) of the locking arrangement. <IMAGE>

Description

Die Erfindung betrifft einen Stuhl nach dem Oberbegriff des Anspruches 1.The invention relates to a chair according to the preamble of claim 1.

Ein derartiger aus der DE 27 33 322 C3 (entspr. US 4 200 332) bekannter Stuhl weist eine sogenannte Synchronmechanik auf, bei der Rückenlehne und Sitz in einem bestimmten vorgegebenen Verhältnis gleichzeitig verschwenkt werden. Der Kraftspeicher dient dazu, eine Verstellung bzw. Verschwenkung der Rückenlehne zu ermöglichen, was dadurch geschieht, daß der Benutzer gegen die Rückenlehne drückt. Hierbei wird der hintere Bereich des Sitzes mit abgesenkt bzw. bei einem Vorschwenken der Rückenlehne nach vorn angehoben. Um die Rückenlehne und den Sitz in einer Stellung fixieren zu können, ist eine längenverstellbare Gasfeder vorgesehen, die in jeder beliebigen Längeneinstellung fixiert werden kann. Der Aufwand hierfür ist groß.Such a chair, known from DE 27 33 322 C3 (corresponding to US Pat. No. 4,200,332), has a so-called synchronous mechanism in which the backrest and seat are pivoted simultaneously in a certain predetermined ratio. The energy accumulator serves to enable an adjustment or pivoting of the backrest, which is done by the user pressing against the backrest. Here, the rear area of the seat is also lowered or raised when the backrest swings forward. In order to be able to fix the backrest and the seat in one position, a length-adjustable gas spring is provided, which can be fixed in any length setting. The effort for this is great.

Aus der EP 0 179 224 B1 (US 4 641 886) ist ein Stuhl der gattungsgemäßen Art bekannt, bei der als Kraftspeicher eine nicht in ihrer Länge feststellbare Gasfeder verwendet wird, deren Gehäuse zur Arretierung der Stellung von hinterem Sitzträgerteil und vorderem Sitzträgerteil zueinander festklemmbar ist. Diese Ausgestaltung ist konstruktiv verhältnismäßig einfach.A chair of the generic type is known from EP 0 179 224 B1 (US Pat. No. 4,641,886), in which a gas spring whose length cannot be determined is used as the energy store, the housing of which can be clamped to one another in order to lock the position of the rear seat support part and the front seat support part . This configuration is structurally relatively simple.

Aus der EP 0 105 180 B1 ist ein Stuhl mit einem Sitz bekannt, der eine gelenkig oder flexibel mit dem Sitz verbundene Rückenlehne aufweist. Es ist eine die Rückenlehne im Sinne einer Steilstellung belastende Feder vorgesehen. Weiterhin ist ein Untergestell vorgesehen, in welchem ein horizontales, vorderes Lagerrohr angeordnet ist, auf welchem der Sitz im Bereich seiner Vorderkante gelenkig abgestützt ist. Weiterhin ist eine hintere, mit Abstand unterhalb des Sitzes liegende, horizontale Stützwelle im Untergestell gelagert, mit der mindestens ein die Rückenlehne etwa in Lendenhöhe des Benutzers gelenkig abstützender Stützhebel starr verbunden ist. Die Rückenlehne weist mindestens einen radial abragenden Nocken auf. Am Untergestell ist weiterhin ein Sperrhebel angelenkt, der durch ein Übertragungsglied an ein das vordere Lagerrohr durchsetzendes durch einen Betätigungshebel drehbares Betätigungsrohr angelenkt ist und der als Sperre in die Bewegungsbahn des Nockens schwenkbar ist. Das Lagerrohr ist mit einem in Umfangsrichtung verlaufenden Langloch für den Durchtritt eines radial vom Betätigungsrohr abragenden Stiftes versehen, an welchem das Übertragungsglied angelenkt ist. In dem Lagerrohr können zwei Betätigungsrohre gelagert sein, die zwei Funktionen ausüben können.A chair with a seat is known from EP 0 105 180 B1, which has an articulated or flexible backrest connected to the seat. It is a spring that loads the backrest in the sense of a steep position intended. A base frame is also provided, in which a horizontal, front bearing tube is arranged, on which the seat is supported in an articulated manner in the region of its front edge. Furthermore, a rear, horizontal support shaft lying at a distance below the seat is mounted in the base frame, with which at least one support lever articulatedly supporting the backrest approximately at the lumbar height of the user is rigidly connected. The backrest has at least one radially protruding cam. Furthermore, a locking lever is articulated on the underframe, which is articulated by a transmission member to an actuating tube which rotates through the actuating lever and which passes through the front bearing tube and which can be pivoted as a lock into the movement path of the cam. The bearing tube is provided with an elongated hole in the circumferential direction for the passage of a pin projecting radially from the actuating tube, to which the transmission member is articulated. Two actuating tubes can be stored in the bearing tube, which can perform two functions.

Der Erfindung liegt die Aufgabe zugrunde, einen Stuhl der gattungsgemäßen Art so auszugestalten, daß bei einfachstem Aufbau ein zuverlässiger störungsfreier und komfortabler Betrieb sichergestellt ist.The invention has for its object to design a chair of the generic type so that reliable and trouble-free and comfortable operation is ensured with the simplest structure.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Dadurch daß eine Anschlagfläche des Verriegelungs-Hebels mit einer gegenüber dem vorderen Sitzträgerteil ortsfesten Verriegelungsfläche zur Anlage bringbar ist, wird dieser Hebel und damit der hintere Sitzträgerteil verriegelt. Es sind keine verschleißanfälligen Klemmeinrichtungen notwendigThis object is achieved by the features in the characterizing part of claim 1. Because a stop surface of the locking lever can be brought into contact with a locking surface which is stationary with respect to the front seat support part, this lever and thus the rear seat support part are locked. No wear-prone clamping devices are necessary

Durch die Ausgestaltung nach Anspruch 2 wird sichergestellt, daß die Verriegelung durch Druck der Anschlagfläche gegen die Verriegelungsfläche entsteht. Die Verriegelung ist also in der am weitesten vorgeschwenkten Stellung der Rückenlehne möglich.The configuration according to claim 2 ensures that the locking occurs by pressing the stop surface against the locking surface. The locking is therefore possible in the most advanced position of the backrest.

Durch die Weiterbildung nach Anspruch 3 erfolgt die Verriegelung durch Schwerkraft. Der Verriegelungs-Hebel muß nur zum Lösen der Verriegelung angehoben werden. Dies erfolgt in besonders vorteilhafter und erfinderischer Weise durch die Ausgestaltungen nach den Ansprüchen 4 bis 7.Through the development according to claim 3, the locking takes place by gravity. The locking lever only needs to release the lock be raised. This is done in a particularly advantageous and inventive manner by the configurations according to claims 4 to 7.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigt

Fig. 1
einen Stuhl in perspektivischer Gesamtdarstellung,
Fig. 2
eine Teildraufsicht auf einen Sitzträger des Stuhles nach Fig. 1,
Fig. 3
einen Bedienungshebel für den Stuhl in perspektivischer Darstellung,
Fig. 4
einen vertikalen Teilschnitt durch den Stuhl gemäß der Schnittlinie IV-IV in Fig. 2,
Fig. 5
einen vertikalen Teilschnitt durch den Stuhl gemäß der Schnittlinie V-V in Fig. 2,
Fig. 6
einen vertikalen Teilschnitt durch den Sitz des Stuhles, wobei eine Sitzneigungs-Verstelleinrichtung gezeigt wird,
Fig. 7
einen vertikalen Teil-Querschnitt durch den Stuhl gemäß der Schnittlinie VII-VII in Fig. 6 und
Fig. 8
eine Teil-Draufsicht auf die Sitzneigungs-Verstelleinrichtung entsprechend einem Sichtpfeil VIII in Fig. 7.
An embodiment of the invention is explained below with reference to the drawing. It shows
Fig. 1
an overall perspective view of a chair,
Fig. 2
2 shows a partial top view of a seat support of the chair according to FIG. 1,
Fig. 3
an operating lever for the chair in a perspective view,
Fig. 4
a vertical partial section through the chair along the section line IV-IV in Fig. 2,
Fig. 5
a vertical partial section through the chair along the section line VV in Fig. 2,
Fig. 6
a partial vertical section through the seat of the chair, a seat inclination adjustment device being shown,
Fig. 7
a vertical partial cross section through the chair along the section line VII-VII in Fig. 6 and
Fig. 8
FIG. 7 shows a partial top view of the seat inclination adjustment device in accordance with an arrow VIII in FIG. 7.

In Fig. 1 ist ein Bürostuhl dargestellt, der ein Stuhlgestell 1 aufweist. Dieses ist mit einem Fußgestell 2 versehen, das sich über Laufrollen 3 gegenüber dem Boden abstützt. Auf dem Fußgestell 2 ist eine höhenverstellbare Stuhlsäule 4 angebracht, an deren oberem Ende ein Sitzträger 5 befestigt ist. Der Sitzträger 5 ist zweiteilig ausgestaltet; er weist einen vorderen Sitzträgerteil 6, der auf der Stuhlsäule 4 befestigt ist, und einen hinteren Sitzträgerteil 7 auf, der oberhalb der Stuhlsäule 4 mittels einer Schwenkachse 8 am vorderen Sitzträgerteil 6 angelenkt ist. Im vorderen Bereich des vorderen Sitzträgerteils 6 ist ein Tragrohr 9 befestigt, das parallel zur Schwenkachse 8 verläuft. Auf diesem Tragrohr 9 stützt sich ein Sitz 10 kurz hinter seiner Vorderkante 11 ab. Der Sitz 10 stützt sich in seinem hinteren Bereich auf eine Stützachse 12 ab, die im hinteren Sitzträgerteil 7 gelagert ist. Am hinteren Sitzträgerteil 7 kann weiterhin eine Sitzneigungs-Verstelleinrichtung 13 angeordnet sein.1 shows an office chair which has a chair frame 1. This is provided with a base frame 2, which is supported by rollers 3 against the floor. On the base 2, a height-adjustable chair column 4 is attached, at the upper end of which a seat support 5 is attached. The seat support 5 is configured in two parts; it has a front seat support part 6, which is fastened on the chair column 4, and a rear seat support part 7, which is above the chair column 4 by means of a pivot axis 8 is articulated on the front seat support part 6. In the front area of the front seat support part 6, a support tube 9 is fastened, which runs parallel to the pivot axis 8. A seat 10 is supported on this support tube 9 shortly behind its front edge 11. The seat 10 is supported in its rear area on a support axis 12 which is mounted in the rear seat support part 7. A seat inclination adjustment device 13 can also be arranged on the rear seat support part 7.

Einstückig mit dem hinteren Sitzträgerteil 7 ist ein von diesem hochragender Rückenlehnen-Träger 14 ausgebildet, auf dem eine Rückenlehne 15 angebracht ist. Um deren Höhe relativ zum Sitz 10 verstellen zu können, ist eine Rückenlehnen-Höhenverstelleinrichtung 16 vorgesehen.In one piece with the rear seat support part 7 is formed a backrest support 14 which projects from this and on which a backrest 15 is attached. In order to be able to adjust their height relative to the seat 10, a backrest height adjustment device 16 is provided.

Die geschilderte Ausgestaltung des Sitzträgers 5 mit der Anordnung des Sitzes 10 und der Rückenlehne 15 bildet eine sogenannte Synchron-Mechanik. Um die bei einem Verstellen oder beim Wippen zu überwindenden Kräfte verändern zu können, ist eine Kraftveränderungs-Einrichtung 17 vorgesehen. Benachbart zur Vorderkante 11 des Sitzes 10, und zwar auf den äußeren Enden des Tragrohres 9 sind Armlehnen 18 angebracht, von denen in der Seitenansicht der Fig. 1 nur eine erkennbar ist.The described design of the seat support 5 with the arrangement of the seat 10 and the backrest 15 forms a so-called synchronous mechanism. In order to be able to change the forces to be overcome when adjusting or rocking, a force changing device 17 is provided. Armrests 18 are attached to the front edge 11 of the seat 10, specifically on the outer ends of the support tube 9, of which only one can be seen in the side view of FIG. 1.

Wie Fig. 2 zu entnehmen ist, sind mit dem vorderen Sitzträgerteil 6 zwei miteinander fluchtende Lagerbüchsen 19, 19' einstückig ausgebildet, in denen zwei das Tragrohr 9 bildende Tragrohrabschnitte 20, 20' miteinander fluchtend gelagert und jeweils mittels einer Schraube 21 drehfest und in Richtung der Achse 22 des Tragrohres 9 unverschiebbar gehalten sind. Die Tragrohrabschnitte 20, 20' ragen nur nach außen über die Lagerbüchsen 19, 19' hinaus. Zwischen den Lagerbüchsen 19, 19' - und demzufolge zwischen den Tragrohrabschnitten 20, 20' - ist ein weitgehend offener Raum 23.As can be seen in FIG. 2, two aligned bearing bushes 19, 19 'are integrally formed with the front seat support part 6, in which two support tube sections 20, 20' forming the support tube 9 are in alignment with one another and in each case by means of a screw 21 rotatably and in the direction the axis 22 of the support tube 9 are held immovably. The support tube sections 20, 20 'only protrude outward beyond the bearing bushes 19, 19'. Between the bearing bushes 19, 19 '- and consequently between the support tube sections 20, 20' - there is a largely open space 23.

In Fig. 2 unten ist auch angedeutet, daß die Armlehne 18 an ihrem unteren Ende mit einer kurzen Haltemuffe 24 versehen ist, die auf das Ende des Tragrohrabschnittes 20' aufgesteckt ist. In der Haltemuffe 24 ist ein mit dieser verbundener Haltezapfen 25 ausgebildet, der in den Tragrohrabschnitt 20' eingreift. Zur Festlegung der Haltemuffe 24 in Richtung der Achse 22 ist eine in der Zeichnung nicht dargestellte Schraube vorgesehen. Zur Verdrehsicherung der Armlehne 18 gegenüber der Achse 22 sind in der Haltemuffe 24 in der Zeichnung nicht dargestellte Positioniervorsprünge ausgebildet, die in am Ende des jeweiligen Tragrohrabschnittes 20 ausgebildete Ausnehmungen 26 eingreifen.In Fig. 2 below is also indicated that the armrest 18 is provided at its lower end with a short holding sleeve 24 which is attached to the end of the support tube section 20 '. In the holding sleeve 24 is a connected with this holding pin 25 which engages in the support tube section 20 '. A screw, not shown in the drawing, is provided to fix the holding sleeve 24 in the direction of the axis 22. To prevent the armrest 18 from rotating relative to the axis 22, positioning projections (not shown in the drawing) are formed in the holding sleeve 24, which engage in recesses 26 formed at the end of the respective support tube section 20.

In jedem Tragrohrabschnitt 20, 20' ist jeweils eine Betätigungswelle um die Achse 22 schwenkbar gelagert, die jeweils mit einem Ende in den offenen Raum 23 hineinragt. In dem in Fig. 2 oben dargestellten Tragrohrabschnitt 20 ist eine Betätigungswelle 27 für eine Stuhlhöhenverstellung gelagert, während in dem in Fig. 2 unten dargestellten Tragrohrabschnitt 20' eine Betätigungswelle 28 für die Betätigung einer Synchronmechanik gelagert ist. Jede Betätigungswelle 27, 28 weist mindestens einen radial zur Achse 22 verlaufenden Mitnahmezapfen 29 auf, der sich durch ein Langloch 30 im jeweiligen Tragrohrabschnitt 20 bzw. 20' nach außen erstreckt. Das jeweilige Langloch 30 erstreckt sich über einen Teil des Umfangs des jeweiligen Tragrohrabschnittes 20, 20', wobei durch die Umfangserstreckung des jeweiligen Langloches 30 auch gleichzeitig der maximale Schwenkwinkel der Betätigungswelle 27 bzw. 28 um die Achse 22 festgelegt wird. Es ist nur ein Mitnahmezapfen 29 und ein Langloch 30 in Fig. 2 dargestellt.In each support tube section 20, 20 ', an actuating shaft is pivotally mounted about the axis 22, which projects into the open space 23 at one end. An actuating shaft 27 for a chair height adjustment is mounted in the support tube section 20 shown above in FIG. 2, while an actuation shaft 28 for the actuation of a synchronous mechanism is mounted in the support tube section 20 ′ shown in FIG. 2 below. Each actuating shaft 27, 28 has at least one driving pin 29 running radially to the axis 22, which extends outwards through an elongated hole 30 in the respective support tube section 20 or 20 '. The respective elongated hole 30 extends over part of the circumference of the respective support tube section 20, 20 ′, the maximum pivoting angle of the actuating shaft 27 or 28 about the axis 22 also being determined by the circumferential extent of the respective elongated hole 30. Only a driving pin 29 and an elongated hole 30 are shown in FIG. 2.

Die Verschwenkung der Betätigungswellen 27, 28 erfolgt jeweils mittels eines Bedienungshebels 31, der eine Steckmuffe 32 und einen daran angebrachten Betätigungsgriff 33 aufweist. Die rohrförmige Steckmuffe 32 wird - vor der Montage der Armlehne 18 am Tragrohr 19 - auf den entsprechenden Tragrohrabschnitt 20 bzw. 20' aufgesteckt, wobei an der Innenseite der Steckmuffe 32 ausgebildete Ausnehmungen 34 mit dem Mitnahmezapfen 29 in Eingriff kommen. Die Ausgestaltung des Bedienungshebels 31 ist Fig. 3 zu entnehmen. Der Betätigungsgriff 33 steht - bezogen auf die Achse 22 - einseitig über die Steckmuffe 32 vor, wie Fig. 2 und 3 entnehmbar ist. Da an beiden Enden der Steckmuffe 32 Ausnehmungen 34 aus gebildet sind, kann die Steckmuffe 32 derart auf den Tragrohrabschnitt 20' aufgesteckt werden, daß der Bedienungshebel 31 nach außen in Richtung auf die Armlehne 18 vorsteht, wie in Fig. 2 unten dargestellt ist. Wenn - was Fig. 2 oben entnehmbar ist - keine Armlehne 18 vorgesehen werden soll, dann kann der Bedienungshebel 31 derart auf den Tragrohrabschnitt 20 aufgesteckt werden, daß der Betätigungsgriff 33 in Richtung zur benachbarten Lagerbüchse 19 vorspringt. In diesem Fall muß das die Ausnehmungen 26 aufweisende stirnseitige Ende des jeweiligen Tragrohrabschnittes 20 nur noch mit einer Abdeckkappe verschlossen werden. Wie Fig. 2 unten zu entnehmen ist, ist zwischen der jeweiligen Lagerbüchse 19' und der benachbarten Steckmuffe 32 ein einen Lagerabschnitt 35 bildenden Bereich des jeweiligen Tragrohrabschnittes 19 bzw. 20 frei geblieben. Auf diesen Lagerbereichen wird - wie weiter unten noch darzustellen sein wird - der Sitz 10 schwenkbar abgestützt.The actuation shafts 27, 28 are each pivoted by means of an operating lever 31 which has a push-in sleeve 32 and an actuating handle 33 attached to it. Before the armrest 18 is mounted on the support tube 19, the tubular plug-in sleeve 32 is pushed onto the corresponding support tube section 20 or 20 ', with recesses 34 formed on the inside of the plug-in sleeve 32 coming into engagement with the driving pin 29. The configuration of the operating lever 31 can be seen in FIG. 3. The actuating handle 33 protrudes - on the axis 22 - on one side via the push-in sleeve 32, as can be seen in FIGS. 2 and 3. Since 32 recesses 34 at both ends of the push-in sleeve are formed, the push-in sleeve 32 can be plugged onto the support tube section 20 'in such a way that the operating lever 31 projects outwards in the direction of the armrest 18, as shown in FIG. 2 below. If - as can be seen in FIG. 2 above - no armrest 18 is to be provided, then the operating lever 31 can be plugged onto the support tube section 20 in such a way that the actuating handle 33 projects in the direction of the adjacent bearing bush 19. In this case, the front end of the respective support tube section 20 having the recesses 26 only has to be closed with a cover cap. As can be seen from FIG. 2 below, an area of the respective support tube section 19 or 20 forming a bearing section 35 is left free between the respective bearing bush 19 'and the adjacent push-in sleeve 32. The seat 10 is pivotally supported on these storage areas, as will be shown further below.

Die Stuhlsäule 4 weist zur Höhenverstellung des Sitzträgers 5 mit Sitz 10 und Rückenlehne 15 eine allgemein bekannte längenverstellbare Gasfeder 36 auf, die in einer als Konus ausgebildeten Klemmeinrichtung 37 des vorderen Sitzträgerteils 6 klemmend gehalten ist. Aus der Gasfeder 36 ragt nach oben ein Ventilbetätigungsstift 38 heraus, bei dessen Einschieben in die Gasfeder 36 ein dort vorhandenes Ventil geöffnet wird, wodurch Lüngenverstellungen der Gasfeder 36 möglich werden. Derartige Gasfedern sind in der Praxis allgemein bekannt und beispielsweise in der DE 18 12 282 C2 (entspr. US-Patent 3 656 593) dargestellt und beschrieben. Zur Betätigung dieses Stiftes 38 ist ein zweiarmiger Ventilbetätigungs-Hebel vorgesehen, der sich schwenkbar gegen die Schwenkachse 8 abstützt, wie Fig. 4 entnehmbar ist. Ein Hebelarm 40 des Hebels 39 liegt gegen den Ventil-Betätigungs-Stift 38 an, während der andere Hebelarm 41 im Bereich des offenen Raumes 23 endet. Dort ist an der Betätigungswelle 27 zur Sitzhöhenverstellung, und zwar an deren in den offenen Raum 23 hineinragendem Abschnitt, ein Ventil-Betätigungsarm 42 angebracht, der etwa radial zur Achse 22 von der Betätigungswelle 27 absteht. Er untergreift mit seinem freien Ende das benachbarte freie Ende des Hebelarmes 41, so daß bei einer Verschwenkung der Betätigungswelle in der Weise, daß das freie Ende 43 nach oben geschwenkt wird, der Hebelarm 40 des Hebels 39 nach unten geschwenkt wird und den Ventil-Betätigungsstift 38 in die Gasfeder 36 hineinschiebt. In Fig. 4 erfolgt diese Verschwenkung im Gegenuhrzeigersinn. Wenn der Benutzer den Betätigungsgriff 33 losläßt, erfolgt die Rückstellung des Stiftes 38 durch den Gasdruck in der Gasfeder 36, wodurch dann auch der Hebel 39 und damit die Betätigungswelle 27 in ihrer Ausgangslage zurückgestellt werden,For height adjustment of the seat support 5 with seat 10 and backrest 15, the chair column 4 has a generally known length-adjustable gas spring 36 which is held in a clamping manner in the form of a cone-shaped clamping device 37 of the front seat support part 6. A valve actuation pin 38 protrudes upward from the gas spring 36 and when it is inserted into the gas spring 36 an existing valve is opened, thereby making it possible to adjust the length of the gas spring 36. Such gas springs are generally known in practice and are shown and described, for example, in DE 18 12 282 C2 (corresponding to US Pat. No. 3,656,593). To actuate this pin 38, a two-armed valve actuation lever is provided, which is pivotably supported against the pivot axis 8, as can be seen in FIG. 4. A lever arm 40 of the lever 39 bears against the valve actuation pin 38, while the other lever arm 41 ends in the region of the open space 23. There is a valve actuating arm 42 attached to the actuating shaft 27 for seat height adjustment, specifically to its section projecting into the open space 23, which projects approximately radially to the axis 22 from the actuating shaft 27. It engages with its free end the adjacent free end of the lever arm 41, so that when the actuating shaft is pivoted in such a way that the free end 43 is pivoted upward, the lever arm 40 of the Lever 39 is pivoted downward and pushes the valve actuating pin 38 into the gas spring 36. In Fig. 4 this pivoting takes place counterclockwise. When the user releases the actuating handle 33, the pin 38 is reset by the gas pressure in the gas spring 36, as a result of which the lever 39 and thus the actuating shaft 27 are also reset in their initial position.

Wie oben bereits angedeutet, ist der Sitz 10 mittels die Lagerabschnitte 35 teilweise umgreifende Rast-Abschnitte 44 elastisch auf die Tragrohrabschnitte 20, 20' aufgerastet. Da der Sitz 10 samt der Rastabschnitte 44 einstückig aus hartelastischem Kunststoff hergestellt ist, ist dies ohne weiteres möglich. Die Rastabschnitte 44 sind insbesondere in Fig. 6 dargestellt. In seinem hinteren Bereich ist der Sitz 10 auf der Stützachse 12 abgestützt, die in sich etwa horizontal erstreckenden Langlöchern 45 im hinteren Sitzträgerteil 7 gelagert ist und die sich parallel zur Achse 22 und zur Schwenkachse 8 erstreckt. Auf diese Stützachse 12 ist der Sitz 10 mittels Rastöffnungen 46 aufgerastet, die in sich vom Sitz 10 nach unten erstreckenden Stegen 47 des Sitzes 10 ausgebildet sind. Wenn der Sitz 10 bei Verschwenkungen des hinteren Sitzträgerteils 7 um die Schwenkachse 8 um die Achse 22 der vorderen Lagerabschnitte 35 verschwenkt, d.h. in seinem hinteren Bereich gehoben oder gesenkt wird, dann ermöglicht das Langloch 45 im hinteren Sitzträgerteil 7 die bei derartigen Verschwenkungen auftretenden im wesentlichen horizontalen Relativbewegungen zwischen Sitz 10 und hinterem Sitzträgerteil 7, indem die Stützachse 12 diese Bewegungen in den Langlöchern 45 ausführt. Bei Verschwenkungen des hinteren Sitzträgerteils 7 um die Schwenkachse 8 wird zum einen die Rückenlehne 15 entsprechend den Schwenkbewegungen des hinteren Sitzträgerteiles 7 verschwenkt. Zum anderen wird der Sitz 10 aufgrund der im wesentlichen vertikalen Schwenkbewegungen der im hinteren Sitzträgerteil 7 gelagerten Stützachse 12 um die ortsfeste Achse 22 verschwenkt. Aus den in den Fig. 1, 4, 6 ersichtlichen geometrischen Verhältnissen der horizontalen Abstandsverhältnisse der Achse 22 zur Schwenkachse 8, zur Stützachse 12 und zur Rückenlehne 15 ergibt sich, daß bei Verschwenkungen des hinteren Sitzträgerteils 7 die Rückenlehne 15 um den 3- bis 4-fachen Winkelbetrag im Vergleich zum Sitz 10 verschwenkt wird.As already indicated above, the seat 10 is snapped elastically onto the support tube sections 20, 20 'by means of latching sections 44 which partially encompass the bearing sections 35. Since the seat 10 together with the latching sections 44 is made in one piece from hard elastic plastic, this is readily possible. The latching sections 44 are shown in particular in FIG. 6. In its rear area, the seat 10 is supported on the support axis 12 which is mounted in approximately horizontally extending elongated holes 45 in the rear seat support part 7 and which extends parallel to the axis 22 and to the pivot axis 8. The seat 10 is snapped onto this support axis 12 by means of latching openings 46 which are formed in webs 47 of the seat 10 which extend downward from the seat 10. If the seat 10 is pivoted about the pivot axis 8 about the axis 22 of the front bearing sections 35 when the rear seat support part 7 is pivoted, that is to say is raised or lowered in its rear region, then the elongated hole 45 in the rear seat support part 7 essentially enables the occurrence of such pivoting horizontal relative movements between the seat 10 and the rear seat support part 7, by the support axis 12 executing these movements in the elongated holes 45. When the rear seat support part 7 is pivoted about the pivot axis 8, on the one hand the backrest 15 is pivoted in accordance with the pivoting movements of the rear seat support part 7. On the other hand, the seat 10 is pivoted about the stationary axis 22 due to the essentially vertical pivoting movements of the support axis 12 mounted in the rear seat support part 7. 1, 4, 6, the geometric ratios of the horizontal spacing ratios of the axis 22 to the pivot axis 8, to the support axis 12 and to the backrest 15 show that when the rear seat support part 7 is pivoted, the backrest 15 by the 3rd to 4th -fold the angular amount compared to the seat 10 is pivoted.

Den zuvor geschilderten Verschwenkungen der Synchron-Mechanik wirkt ein Kraft-Speicher 48 entgegen, bei dem es sich im dargestellten Ausführungsbeispiel um eine vorgespannte Schrauben-Druckfeder 49 handelt. Diese Schrauben-Druckfeder 49 stützt sich über ein schwenkbares Widerlager 50 gegen den vorderen Sitzträgerteil 6 unterhalb der Betätigungswelle 28 im offenen Raum 23 ab. Mit ihrem anderen Ende stützt sich die Druckfeder 49 gegen einen Gleitschuh 51 der Kraftveränderungs-Einrichtung 17 ab. Der Gleitschuh 51 wiederum liegt gegen eine Gleitfläche 52 an, die an einem Hebelarm 53 des hinteren Sitzträgerteils 7 ausgebildet ist. Dieser Hebelarm 53 ist einstückig mit dem hinteren Sitzträgerteil ausgebildet und verläuft von der Schwenkachse 8 im wesentlichen nach unten. Geometrisch ist insofern der hintere Sitzträgerteil als Winkelhebel ausgebildet. Das schwenkbare Widerlager 50 ist mit einer die Druckfeder 49 durchsetzenden Stange 54 versehen, auf der auch der Gleitschuh 51 in Richtung der Druckfeder 49 verschiebbar ist. An dem dem Widerlager 50 entgegengesetzten Ende der Stange 54 greift die Kraftveränderungs-Einrichtung 17 an. Sie weist eine an der Stange 54 angelenkte Stellschraube 55 auf, die in eine Stellmutter 56 eingreift, die als Teil eines Drehgriffes 57 ausgebildet ist und in einer unteren Wand 58 des vorderen Sitzträgerteils 6 drehbar aber in Richtung der Stellschraube 55 unverschiebbar gelagert ist. Bei Drehungen des Drehgriffes 57 mit der Stellmutter 56 wird demzufolge die Stellschraube 55 mit der Stange 54 um das Schwenkgelenk 59 verschwenkt, über das sich das schwenkbare Widerlager 50 im vorderen Sitzträgerteil 6 abstützt. Der Gleitschuh 51 wird hierbei auf der Gleitfläche 52 des Hebelarmes 53 verschoben, wodurch der Abstand der Achse 60 des Kraftspeichers 48 von der Schwenkachse 8 verändert wird. Da die Gleitfläche 52 zumindest angenähert auf einem Kreisbogenabschnitt liegt, dessen Mittelpunkt durch das Schwenkgelenk 59 gebildet wird, wird bei Verdrehungen des Drehgriffes 57 der Abstand b zwischen dem Schwenkgelenk 59 und dem Schnittpunkt der Achse 60 mit der Gleitfläche 52 nicht oder nur geringfügig verändert, so daß sich bei derartigen Verstellungen die Vorspannung der Schrauben-Druckfeder 49 nicht ändert.The previously described pivoting of the synchronous mechanism is counteracted by a force accumulator 48, which in the exemplary embodiment shown is a prestressed helical compression spring 49. This helical compression spring 49 is supported via a pivotable abutment 50 against the front seat support part 6 below the actuating shaft 28 in the open space 23. With its other end, the compression spring 49 is supported against a slide shoe 51 of the force changing device 17. The sliding shoe 51 in turn bears against a sliding surface 52 which is formed on a lever arm 53 of the rear seat support part 7. This lever arm 53 is formed in one piece with the rear seat support part and extends essentially downwards from the pivot axis 8. Geometrically, the rear seat support part is designed as an angle lever. The pivotable abutment 50 is provided with a rod 54 passing through the compression spring 49, on which the slide shoe 51 can also be displaced in the direction of the compression spring 49. The force changing device 17 acts on the end of the rod 54 opposite the abutment 50. It has an adjusting screw 55 articulated on the rod 54, which engages in an adjusting nut 56 which is designed as part of a turning handle 57 and is rotatably mounted in a lower wall 58 of the front seat support part 6 but is non-displaceably in the direction of the adjusting screw 55. When the handle 57 rotates with the adjusting nut 56, the adjusting screw 55 is therefore pivoted with the rod 54 about the swivel joint 59, by means of which the pivotable abutment 50 is supported in the front seat support part 6. The sliding block 51 is shifted on the sliding surface 52 of the lever arm 53, whereby the distance between the axis 60 of the energy accumulator 48 and the pivot axis 8 is changed. Since the sliding surface 52 lies at least approximately on a circular arc section, the center point of which is formed by the swivel joint 59, the distance b between the swivel joint 59 and the intersection of the axis 60 with the sliding surface 52 is not or only slightly changed when the rotary handle 57 is rotated, so that the bias of the helical compression spring 49 does not change with such adjustments.

Die von der Druckfeder 49 auf den Hebelarm 53 wirkende Kraft wird also nicht verändert; es wird lediglich durch Veränderung des Abstandes a zwischen der Achse 60 und der Schwenkachse 8 der wirksame Hebelarm, d.h. insgesamt das von der Druckfeder 49 auf den hinteren Sitzträgerteil 7 und damit auf den Sitz 10 und die Rückenlehne 15 wirkende Drehmoment verändert. Dieses Drehmoment ist umso kleiner, je kleiner der Abstand a ist und umgekehrt. Damit können auch die am Drehgriff 57 aufzubringenden Verstellkräfte über den gesamten Verstellweg des Gleitschuhs 51 konstant gehalten werden, da sich die Reibungskräfte zwischen Gleitschuh 51 und Gleitfläche 52 praktisch nicht ändern.The force acting on the lever arm 53 by the compression spring 49 is therefore not changed; it is only by changing the distance a between the axis 60 and the pivot axis 8, the effective lever arm, that is to say in total the torque acting by the compression spring 49 on the rear seat support part 7 and thus on the seat 10 and the backrest 15. This torque is smaller the smaller the distance a is and vice versa. This means that the adjustment forces to be applied to the rotary handle 57 can also be kept constant over the entire adjustment path of the slide shoe 51, since the frictional forces between the slide shoe 51 and the sliding surface 52 practically do not change.

Um die geschilderten gemeinsame Verschwenkbarkeit des Sitzes 10 und der Rückenlehne 15 gegen die Kraft der Druckfeder 49 ausschalten zu können, ist eine Verriegelungseinrichtung 61 vorgesehen. Diese im wesentlichen in den Fig. 2 und 5 dargestellte Verriegelungseinrichtung 61 weist einen Verriegelungs-Hebel 62 auf, der an dem Hebelarm 53 des hinteren Sitzträgerteils 7 mittels einer Schwenkverbindung 63 angebracht ist und um eine zur Schwenkachse 8 parallele Achse verschwenkbar ist. Die Schwenkverbindung 63 befindet sich im unteren Bereich des Hebelarmes 53, weist also einen deutlichen Abstand zur Schwenkachse 8 auf. Der Verriegelungs-Hebel 62 ist an seiner Unterseite mit einer etwa senkrecht zu seiner Längsrichtung verlaufenden Anschlagfläche 64 versehen, der eine ortsfeste Verriegelungsfläche 65 zugeordnet ist. Diese Verriegelungsfläche 65 ist im vorderen Sitzträgerteil 6 ausgebildet, und zwar im Bereich von dessen unterer Wand 58. Die Verriegelungsfläche 65 ist der Schwenkverbindung 63 zugewandt, wohingegen die Anschlagfläche 64 der Verriegelungsfläche 65 zugewandt ist. Entgegengesetzt der Schwenkverbindung 63 weist der Verriegelungshebel 62 ein gabelförmiges Ende 66 auf, unter das ein Verriegelungs-Betätigungsarm 67 greift, der T-förmig ausgebildet ist und mit der Betätigungswelle 28 fest verbunden ist. Es greift also ein Quersteg 67a des Betätigungsarmes 67 unter das gabelförmige Ende 66. Der Betätigungsarm 67 steht von dem im offenen Raum 23 befindlichen Abschnitt der Betätigungswelle 27 in radialer Richtung zur Achse 22 vor. Durch die für die Betätigungswelle 27 bereits geschilderte Verschwenkung dieser Betätigungswelle 28 wird der Verriegelungs-Betätigungsarm 67 zwischen einer in Fig. 5 ausgezogen dargestellten Stellung und einer dort strichpunktiert dargestellten Stellung verschwenkt. In der in Fig. 5 ausgezogen dargestellten Stellung hebt der Verriegelungs-Betätigungsarm 67 den Verriegelungs-Hebel 62 soweit an, daß seine Anschlagfläche 64 außer Eingriff mit der Verriegelungsfläche 65 kommt. Wenn jetzt der Benutzer des Stuhles die Rückenlehne 15 gegen die Kraft der Druckfeder 49 nach hinten drückt, dann kann das gabelförmige Ende 66 des Verriegelungshebels 62 auf dem T-förmigen Betätigungsarm 67 in Richtung zur Betätigungswelle 27 hin verschoben werden. Es ist also ein freies Wippen mit der Synchron-Mechanik möglich. Wenn dagegen die Betätigungswelle 28 mittels des Bedienungshebels 31 in die in Fig. 5 strichpunktiert dargestellte Stellung verschwenkt wird, dann kommt der Quersteg 67a des T-förmigen Betätigungsarms 67 außer Eingriff mit dem gabelförmigen Ende 66, so daß letzteres über einen mit der Verriegelungsfläche 65 verbundenen Führungszapfen 68 fallen kann. Dieses Herunterschwenken des Verriegelungs-Hebels 62 ist aber nur möglich, wenn das hintere Sitzträgerteil 7 durch die Kraft der Schrauben-Druckfeder 49 bei entsprechender Entlastung der Rückenlehne 15 und des Sitzes 10 in eine Stellung verschwenkt ist, in der die Rückenlehne 15 ihre vordere Endposition und der Sitz 10 seine obere Endposition einnimmt. In diesen Positionen ist der Abstand der Schwenkverbindung 63 von der Verriegelungsfläche 65 so groß, daß der Verriegelungs-Hebel 62 in eine in Fig. 5 strichpunktiert dargestellte untere Verriegelungsstellung fallen kann. Eine Verriegelung des hinteren Sitzträgerteils 7 gegenüber dem vorderen Sitzträgerteil 6 und damit eine Fixierung der Rückenlehne 15 und des Sitzes 10 jeweils in einer Position ist also nur in dieser geschilderten Stellung möglich. Wenn der entriegelte Verriegelungs-Hebel 62 durch Verschwenkungen des hinteren Sitzträgerteils 7 im wesentlichen in seiner Längsrichtung bewegt wird, dann gleitet seine Unterseite 69 über eine zwischen der Verriegelungsfläche 65 und dem Führungszapfen 68 ausgebildete Auflagefläche 70 des vorderen Sitzträgerteils 6.In order to be able to switch off the described pivoting of the seat 10 and the backrest 15 against the force of the compression spring 49, a locking device 61 is provided. This locking device 61, shown essentially in FIGS. 2 and 5, has a locking lever 62 which is attached to the lever arm 53 of the rear seat support part 7 by means of a pivot connection 63 and can be pivoted about an axis parallel to the pivot axis 8. The swivel connection 63 is located in the lower region of the lever arm 53, and is therefore at a clear distance from the swivel axis 8. The locking lever 62 is provided on its underside with an approximately perpendicular to its longitudinal direction stop surface 64, which is assigned a stationary locking surface 65. This locking surface 65 is formed in the front seat support part 6, specifically in the area of the lower wall 58 thereof. The locking surface 65 faces the pivot connection 63, whereas the stop surface 64 faces the locking surface 65. Contrary to the pivot connection 63, the locking lever 62 has a fork-shaped end 66, under which a locking actuating arm 67 engages, which is T-shaped and is fixedly connected to the actuating shaft 28. A crossbar 67a of the actuating arm 67 therefore engages under the fork-shaped end 66. The actuating arm 67 protrudes radially from the section of the actuating shaft 27 located in the open space 23 in relation to the axis 22. Due to the pivoting of this actuating shaft 28 already described for the actuating shaft 27, the locking actuating arm 67 is pivoted between a position shown in solid lines in FIG. 5 and a position shown in broken lines there. In the position shown in solid lines in FIG. 5, the locking actuating arm 67 lifts the Locking lever 62 so far that its stop surface 64 comes out of engagement with the locking surface 65. If the user of the chair now presses the backrest 15 back against the force of the compression spring 49, the fork-shaped end 66 of the locking lever 62 on the T-shaped actuating arm 67 can be displaced in the direction of the actuating shaft 27. So it is possible to rock freely with the synchronous mechanism. If, on the other hand, the actuating shaft 28 is pivoted into the position shown in broken lines in FIG. 5 by means of the operating lever 31, the transverse web 67a of the T-shaped actuating arm 67 comes out of engagement with the fork-shaped end 66, so that the latter is connected to the locking surface 65 via one Guide pin 68 can fall. This pivoting down of the locking lever 62 is only possible if the rear seat support part 7 is pivoted by the force of the compression coil spring 49 with a corresponding relief of the backrest 15 and the seat 10 into a position in which the backrest 15 and its front end position the seat 10 assumes its upper end position. In these positions, the distance between the pivot connection 63 and the locking surface 65 is so large that the locking lever 62 can fall into a lower locking position shown in broken lines in FIG. 5. Locking the rear seat support part 7 with respect to the front seat support part 6 and thus fixing the backrest 15 and the seat 10 in one position is therefore only possible in this position. If the unlocked locking lever 62 is moved essentially in its longitudinal direction by pivoting the rear seat support part 7, then its underside 69 slides over a support surface 70 of the front seat support part 6 formed between the locking surface 65 and the guide pin 68.

Abweichend von der Abstützung des Sitzes 10 über die relativ zum hinteren Sitzträgerteil 7 im wesentlichen ortsfeste Stützachse 12 kann die Grundeinstellung der Sitzneigung auch über eine alternativ mögliche Sitzneigungs-Verstelleinrichtung 13 verändert werden, die im wesentlichen in den Fig. 6 bis 8 dargestellt ist. Hierbei ist nicht eine durchgehende stabförmige Stützachse 12 vorgeshen, sondern die Stützachse 12' wird durch zwei Zapfen 71, 71' gebildet, die in Lagerteilen 72 an der Unterseite des Sitzes 10 klemmend gehalten sind, so daß sie auch nachträglich montiert oder gegebenenfalls wieder ohne Zerstörung des Sitzes 10 herausgezogen werden können. Sie befinden sich - wie den Fig. 7 und 8 entnehmbar ist - beiderseits des hinteren Sitzträgerteils 7, so daß sie an dessen Stegen 47 vorbeischwenken können.Deviating from the support of the seat 10 via the support axis 12, which is essentially fixed relative to the rear seat support part 7, the basic setting of the seat inclination can also be changed via an alternatively possible seat inclination adjusting device 13, which is shown essentially in FIGS. 6 to 8. Here, a continuous rod-shaped support axis 12 is not provided, but the support axis 12 ' formed by two pins 71, 71 ', which are held clamped in bearing parts 72 on the underside of the seat 10, so that they can also be retrofitted or, if necessary, pulled out again without destroying the seat 10. They are - as can be seen in FIGS. 7 and 8 - on both sides of the rear seat support part 7, so that they can pivot past the webs 47 thereof.

Am Sitzträgerteil 7 ist eine nach Art eines doppelarmigen Hebels ausgebildete Wippe 73 um eine Schwenkachse 74 schwenkbar gelagert. Die Schwenkachse 74 ist in Öffnungen 47a in den Stegen 47 des hinteren Sitzträgerteils 7 eingeschoben. Sie durchsetzt außerdem stegartige Lagerwangen 73a, die an der dem hinteren Sitzträgerteil 7 zugewandten Unterseite der Wippe 73 ausgebildet sind. Die Schwenkachse 74 kann in den Stegen 47 bzw. den stegartigen Lagerwangen 73a klemmend gehalten sein. Die Wippe 73 weist zwei ebenfalls beiderseits des hinteren Sitzträgerteils 7 befindliche gabelförmige Hebelarme 75, 75' auf, die jeweils einen Zapfen 71 bzw. 71' übergreifen, so daß bei Verschwenkungen der Wippe 73 um die zur Schwenkachse 8 parallele Schwenkachse 74 die Zapfen 71, 71' in der Höhe verändert werden. Damit wird bei ansonsten fester Lage von hinterem Sitzträgerteil 7 zu vorderen Sitzträgerteil 6, also ohne gleichzeitige Verstellung der Lage der Rückenlehne 15, der Sitz 10 um die Achse 22 verschwenkt, so daß sein hinterer Bereich 76 eine höhere oder niedrigere Stellung relativ zum hinteren Sitzträgerteil 7 einnimmt. Diese Verschwenkungen der Wippe 73 werden in ähnlicher Weise realisiert, wie die Verschwenkungen der Druckfeder 49 der Kraftveränderungs-Einrichtung 17.A rocker 73 designed in the manner of a double-armed lever is pivotably mounted on the seat support part 7 about a pivot axis 74. The pivot axis 74 is inserted into openings 47a in the webs 47 of the rear seat support part 7. It also penetrates web-like bearing cheeks 73a which are formed on the underside of the rocker 73 facing the rear seat support part 7. The pivot axis 74 can be held clamped in the webs 47 or the web-like bearing cheeks 73a. The rocker 73 has two fork-shaped lever arms 75, 75 ', which are also located on both sides of the rear seat support part 7 and each engage a pin 71 or 71', so that when the rocker 73 is pivoted about the pivot axis 74 parallel to the pivot axis 8, the pins 71, 71 'can be changed in height. Thus, in an otherwise fixed position from the rear seat support part 7 to the front seat support part 6, i.e. without simultaneous adjustment of the position of the backrest 15, the seat 10 is pivoted about the axis 22, so that its rear region 76 has a higher or lower position relative to the rear seat support part 7 occupies. These swiveling of the rocker 73 are realized in a similar manner to the swiveling of the compression spring 49 of the force changing device 17.

An dem den gabelförmigen Hebelarmen 75, 75' entgegengesetzten plattenförmigen Hebelarm 77 der Wippe 73 ist eine Stellschraube 78 angelenkt, die in eine Stellmutter 79 eingreift. Diese ist fest mit einem Drehgriff 80 verbunden, der zusammen mit der Stellmutter 79 drehbar aber in Richtung der Stellschraube 78 unverschiebbar in einer Öffnung 81 einer Wand 82 des hinteren Sitzträgerteils 7 gelagert ist. Die Stellschraube 78 weist an ihrem der Stellmutter 79 entgegengesetzten Ende einen Quersteg 83 auf, der in Langlöcher 84 von Widerlagerstegen 85 des Hebelarmes 77 eingreift. Bei Drehungen des Drehgriffes 80 wird die Stellschraube 78 in die Stellmutter 79 hineingeschraubt oder aus dieser herausgeschraubt, was entsprechende Verschwenkungen der Wippe 73 um die Schwenkachse 74 zur Folge hat, wobei die hiermit erzielbare niedrigste Grundeinstellung des Sitzes 10 in Fig. 6 ausgezogen dargestellt ist, während die höchstmögliche Grundeinstellung in Fig. 6 strichpunktiert dargestellt ist.On the plate-shaped lever arm 77 of the rocker 73 opposite the fork-shaped lever arms 75, 75 ', an adjusting screw 78 is articulated which engages in an adjusting nut 79. This is firmly connected to a rotary handle 80 which, together with the adjusting nut 79, is rotatably but immovably mounted in the direction of the adjusting screw 78 in an opening 81 in a wall 82 of the rear seat support part 7. The adjusting screw 78 has at its end opposite the adjusting nut 79 a transverse web 83 which engages in elongated holes 84 of abutment webs 85 of the lever arm 77. When the handle 80 is rotated, the adjusting screw 78 is inserted into the adjusting nut 79 screwed in or unscrewed from this, which results in corresponding swiveling of the rocker 73 about the pivot axis 74, the lowest basic setting of the seat 10 which can be achieved hereby being shown in solid lines in FIG. 6, while the highest possible basic setting is shown in broken lines in FIG. 6.

Bei der als Zusatzausrüstung möglichen - gegebenenfalls also nachträglichen - Montage der Sitzneigungs-Verstelleinrichtung 13 wird die Stellmutter 79 von oben durch die Öffnung 81 in der Wand 82 geschoben und der Drehgriff 80 von unten dagegengesetzt; beide Teile werden dann mit einer Schraube 86 verbunden. Außerdem werden die Zapfen 71, 71' in die Lagerteile 72 eingeschoben bzw. gepreßt. Die Wippe 73 wird durch Einschieben der Schwenkachse 74 mit dem hinteren Sitzträgerteil 7 verbunden. Außerdem wird die Stützachse 12 aus den Langlöchern 45 herausgezogen. Die Zapfen 71, 71' werden dann in die gabelförmigen Hebelarme 75, 75' eingeschoben. Anschließend wird der Sitz 10 mit dem vorderen Tragrohr 9 dadurch verbunden, daß die Rast-Abschnitte 44 elastisch auf die Tragrohrabschnitte 20, 20' aufgerastet werden, auf denen sie um die Achse 22 verschwenkbar sind. Die Demontage geht entsprechend vor sich.When mounting the seat inclination adjustment device 13, which is possible as an additional equipment, if necessary subsequently, the adjusting nut 79 is pushed from above through the opening 81 in the wall 82 and the rotary handle 80 is set against it from below; both parts are then connected with a screw 86. In addition, the pins 71, 71 'are inserted or pressed into the bearing parts 72. The rocker 73 is connected to the rear seat support part 7 by inserting the pivot axis 74. In addition, the support axis 12 is pulled out of the elongated holes 45. The pins 71, 71 'are then inserted into the fork-shaped lever arms 75, 75'. Then the seat 10 is connected to the front support tube 9 in that the latching sections 44 are elastically snapped onto the support tube sections 20, 20 ', on which they can be pivoted about the axis 22. The disassembly takes place accordingly.

Claims (7)

  1. A chair, in particular an office chair, comprising
    - a pedestal (2)
    - a chair column (4) projecting upwards from the pedestal (2)
    - a seat support (5) supported on the chair column (4) and having a front seat support member (6) joined to the chair column (4) and a rear seat support member (7) joined to the front seat support member (6) by way of a pivot axle (8)
    - a seat (10) pivotably supported on the seat support members (6, 7)
    - a back-rest (15) secured to the rear seat support member (7)
    - an energy storing device (48), of which one end is positioned on the front seat support member (6) by means of a pivot hinge (59) and of which the other end is pivotably supported on the rear seat support member (7) at a distance (a) from the pivot axle (8), and
    - a blocking mechanism (61) for arresting the rear seat support member (7) in relation to the front seat support member (6),
    characterized in that
    the blocking mechanism (61) has a blocking lever (62) articulated on the rear seat support member (7) at a distance from the pivot axle (8) by means of a pivot joint (63) and provided with a stop face (64) which is pivotable into bearing engagement with a blocking face (65) stationary referred to the front seat support member (6) and releasable from this bearing engagement by means of a blocking actuator arm (67).
  2. A chair according to claim 1, characterized in that the stop face (64) is turned away from the pivot joint (63) and that the blocking face (65) faces the latter.
  3. A chair according to claim 1 or 2, characterized in that the blocking lever (62) is pivotable upwards out of the bearing engagement of the stop face (64) with the blocking face (65).
  4. A chair according to one of the claims 1 to 3, characterized in that the blocking actuator arm (67) engages from below an end of the blocking lever (62) turned away from the pivot joint (63) to release the bearing engagement of the stop face (64) with the blocking face (65).
  5. A chair according to one of the claims 1 to 4, characterized in that the blocking actuator arm (67) is arranged on an actuating shaft (28) which is pivotably arranged in a suspension tube (9) supporting the seat (10) in the vicinity of front edge (11) of the seat (10).
  6. A chair according to one of the claims 1 to 5, characterized in that the blocking actuator arm (67) is T-shaped with a transverse web (67a) engaging the blocking lever (62) from below.
  7. A chair according to claim 6, characterized in that the blocking lever (62) has a forked end (66) which faces the blocking actuator arm (67) and with which the blocking actuator arm (67) engages.
EP94110870A 1993-07-22 1994-07-13 Chair, particularly office chair Expired - Lifetime EP0635228B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4324542A DE4324542A1 (en) 1993-07-22 1993-07-22 Chair, especially office chair
DE4324545A DE4324545C2 (en) 1993-07-22 1993-07-22 Chair, especially office chair
DE4324543A DE4324543C2 (en) 1993-07-22 1993-07-22 Chair, especially office chair
DE4324542 1993-07-22
DE4324541A DE4324541A1 (en) 1993-07-22 1993-07-22 Chair, especially office chair

Publications (2)

Publication Number Publication Date
EP0635228A1 EP0635228A1 (en) 1995-01-25
EP0635228B1 true EP0635228B1 (en) 1996-09-25

Family

ID=42309850

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EP94110869A Expired - Lifetime EP0635227B1 (en) 1993-07-22 1994-07-13 Chair, particularly office chair
EP94110870A Expired - Lifetime EP0635228B1 (en) 1993-07-22 1994-07-13 Chair, particularly office chair

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EP94110869A Expired - Lifetime EP0635227B1 (en) 1993-07-22 1994-07-13 Chair, particularly office chair

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US (2) US5797653A (en)
EP (2) EP0635227B1 (en)
JP (2) JP3544709B2 (en)
AT (2) ATE159154T1 (en)
DE (6) DE4324542A1 (en)
DK (2) DK0635227T3 (en)
ES (1) ES2107715T3 (en)
FI (2) FI109574B (en)

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FI105889B (en) 2000-10-31
EP0635228A1 (en) 1995-01-25
FI943434A (en) 1995-01-23
US5564783A (en) 1996-10-15
DE59400730D1 (en) 1996-10-31
DE4324545A1 (en) 1995-01-26
ES2107715T3 (en) 1997-12-01
US5797653A (en) 1998-08-25
JP3549577B2 (en) 2004-08-04
DK0635228T3 (en) 1997-03-17
DK0635227T3 (en) 1998-06-02
JPH0751143A (en) 1995-02-28
DE59404317D1 (en) 1997-11-20
FI943434A0 (en) 1994-07-20
FI109574B (en) 2002-09-13
JPH0751144A (en) 1995-02-28
JP3544709B2 (en) 2004-07-21
ATE159154T1 (en) 1997-11-15
DE4324541A1 (en) 1995-01-26
EP0635227B1 (en) 1997-10-15
ATE143235T1 (en) 1996-10-15
DE4324545C2 (en) 2003-10-16
EP0635227A1 (en) 1995-01-25
FI943433A (en) 1995-01-23
DE4324543A1 (en) 1995-01-26
FI943433A0 (en) 1994-07-20
DE4324542A1 (en) 1995-01-26
DE4324543C2 (en) 2003-06-26

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