EP0247328A1 - Rotatable chair adjustable in height and provided with a gas pressure spring, particularly an office chair - Google Patents

Rotatable chair adjustable in height and provided with a gas pressure spring, particularly an office chair Download PDF

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Publication number
EP0247328A1
EP0247328A1 EP87104799A EP87104799A EP0247328A1 EP 0247328 A1 EP0247328 A1 EP 0247328A1 EP 87104799 A EP87104799 A EP 87104799A EP 87104799 A EP87104799 A EP 87104799A EP 0247328 A1 EP0247328 A1 EP 0247328A1
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EP
European Patent Office
Prior art keywords
tube
swivel chair
chair according
backrest frame
frame
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.)
Granted
Application number
EP87104799A
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German (de)
French (fr)
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EP0247328B1 (en
Inventor
Heinzel Dipl.-Ing. Eberhard
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.)
Kusch and Co Sitzmoebelwerke GmbH and Co KG
Original Assignee
Kusch and Co Sitzmoebelwerke GmbH and Co KG
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Filing date
Publication date
Application filed by Kusch and Co Sitzmoebelwerke GmbH and Co KG filed Critical Kusch and Co Sitzmoebelwerke GmbH and Co KG
Priority to AT87104799T priority Critical patent/ATE59761T1/en
Publication of EP0247328A1 publication Critical patent/EP0247328A1/en
Application granted granted Critical
Publication of EP0247328B1 publication Critical patent/EP0247328B1/en
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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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • 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
    • A47C1/03279—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 of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder

Definitions

  • the invention relates to a swivel chair of the type specified in the preamble of claim 1.
  • DE-GM 84 17 429 discloses a "point synchronous adjustment device" with which this disadvantageous effect is to be avoided.
  • an elaborate and, above all, voluminous mechanism is provided under the seat, which also does not make the design of the chair or armchair appealing.
  • the invention has for its object to cope with the above-described problem of the "pull-out effect" with a relatively simple and compactly housed rocking or inclination adjustment mechanism.
  • the swivel chair according to the invention offers, by means of the rocking axes of the seat and backrest which are shifted far forward, an optimal synchronous movement to avoid the "pull-out effect" with space-saving and a completely new and stable chair design which enables the overall mechanism to be accommodated, in which no bellows to cover any crushing or shearing points is needed.
  • the supporting structure which consists exclusively of inexpensive steel pipes, serves as the base frame for an entire model family, i.e. from the typist's chair to the heavy executive chair.
  • the lower end of a support tube (3) which is bent at an obtuse angle is slidably and rotatably guided on a support tube (2) which is firmly connected to a base (1) of the swivel chair, a plastic bushing (4) being arranged between the support tube (2) and the support tube (3). is provided for guidance and additional support.
  • the standpipe (2) receives a gas pressure spring (6) on the inside in a plastic guide sleeve (5), which is supported at the bottom in the standpipe (2) on an axial pressure bearing (7) and with a cone (8) in a cone bushing (9 ) is seated, which is welded at (10) through a bore to the support tube (3) and at (11) with an insert tube (12) welded into the lower end of the support tube (3).
  • a cross tube (13) is firmly connected to the upper end of the support tube (3).
  • the support tube (3) and the cross tube (13) are cut out and welded together so that the clear cross section of both tubes (3, 13) is not constricted at any point by this connection.
  • the cross tube (13) runs perpendicular to the support tube (3) and lies horizontally.
  • a guide block (14) is fastened with screws (15) in the support tube (3).
  • a locking bolt (16) is slidably mounted, which engages in a toothed rack (19) for fixing an inclined position of a seat frame (17) and a backrest frame (18), which in the embodiment of FIGS. 1 and 2 is fastened to a crossbar (20) of the seat frame (17) and projects into the support tube (3) via an opening (21).
  • the toothed rack (19) has a longer tooth (22) at the free inner end, which abuts against it when the latching bolt (16) is withdrawn, so that the toothed rack (19) is not completely pulled out of the opening (21) of the support tube (3) can.
  • the release movement of the locking bolt (16) is limited by a leaf spring (23) which can be pushed away with a screwdriver or the like when dismantling the mechanism.
  • the locking bolt (16) is connected via a connecting rod (24) to a lever (25) on a shaft (26) which is mounted in bearing blocks (27, 28) within the left side of the cross tube (13) and one at the outer end Actuating lever (not shown here), which is accessible at the front left under the seat frame (17).
  • bearing blocks (27, 28) In the right side of the cross tube (13) there are further bearing blocks (29, 30) in which a further shaft (31) aligned with the shaft (26) is mounted, which shaft belongs to the actuating mechanism for the height adjustment of the chair.
  • a lever (32) at the inner end of the shaft (31) is connected via a connecting rod (33) to an angle lever (34) which is mounted at the rear end of the guide block (14) and which is accessible under the seat when actuated at the front right Actuating lever (35) (Fig. 2) presses on a tappet (36) of the valve of the gas pressure spring (6) to release it for height adjustment.
  • the seat frame (17) has bearing eyelets (37) on both sides at the front end, which are rotatably mounted on pins (38) that can be screwed into the outer bearing blocks (27, 29).
  • the axis for the pivot mounting of the backrest frame (18) in the bearing blocks (27-30) is formed by two torsion springs (39), each of which is fixed with a long spring leg (40) in an associated tube of the lower part of the backrest frame (18) .
  • bushings (41) are provided in these tubes, and the spring legs (40) have flats (42) on which clamping screws (not shown) engage.
  • the torsion springs (39) have shorter spring legs (43) which press against a stop block (44) designed as an adjusting nut, which at the front end of the support tube (3) with a knurled disc (45) is adjustable to the spring force the torsion springs (39).
  • the seat frame (17) and the backrest frame (18) are connected to one another on both sides by articulated brackets (46).
  • the exemplary embodiment shown in FIG. 4 differs from the exemplary embodiment according to FIG. 1 only in that the toothed rack (19) is fastened here to a crossbar (49) of the lower part of the backrest frame (18) and the latter to the seat frame (17) is connected via a rubber-metal buffer (50).
  • the torsion springs (39) are preferably made from round steel, but can also consist of leaf spring assemblies.
  • the upholstery of the chair, not shown, can be arbitrary, since the chair frame described and its mechanics, as mentioned at the beginning, serve as the base frame for an entire model family.
  • Fig. 5 shows in partial section a further embodiment of the swivel chair.
  • the locking bolt (16 ⁇ ) is under the force of a spring (51), which strives to insert the locking bolt (16 ⁇ ) in the rack (19).
  • a button (not shown here) for triggering the latch (16 ⁇ ) is designed as a latching button, ie when the button is pressed for the first time, the latch (16 ⁇ ) is pulled out of the rack (19) in order to be released again when the button is pressed a second time .
  • a locking device is used with a pawl (54) which can be pivoted in two planes under the force of a spring (53), as is customary in the case of locking switching buttons of electrical or electronic devices and therefore in detail need not be described.
  • the pawl (54) works together with a pin (55) on the locking bolt (16 ⁇ ).
  • the outermost ends of the torsion springs (39 ⁇ ) are positively connected to pipes (57) via coupling bushes (56) (see FIGS. 7 and 8), which transmit the torsional force in the direction of a spindle nut (44 ⁇ ).
  • Flattened ends (58) of the torsion springs (39 ⁇ ) are in corresponding flat bores (59) of the coupling bushes (56).
  • hooks (60) are attached, which engage in hook-shaped lugs (61) on the spindle nut (44 ⁇ ).
  • the pretension of the torsion springs (39 ⁇ ) can be adjusted by adjusting an adjusting spindle (62) seated in the spindle nut (44 ⁇ ) by means of a rotary knob (63).
  • the figures 9 to 11 show the adjustment mechanism for the prestressing of the torsion springs (39 ⁇ ) somewhat enlarged.
  • a rectangular housing-like extension (64) projecting forward is fastened to the cross tube (13 ⁇ ) and contains the adjusting spindle (62) and the spindle nut (44 ⁇ ).
  • the adjusting spindle (62) has an annular collar (65) on which an axial ball bearing (66) rests, which finds its other abutment on a substantially rectangular counter-pressure disc (67), which, as indicated by dash-dotted lines in Fig. 10, the installation of the Spindle (62) with nut (44 ⁇ ) and their own installation without screws and tools allows because the counter pressure plate (67) has an enlarged bore (68).
  • the counter pressure plate (67) With a flat recess (69), the counter pressure plate (67) is seated in a recess (70) of the housing-like extension (64) in the assembled state.
  • Fig. 12 shows i.a. the arrangement and design of an actuation button (73), which is mounted at one end (here at the right end) of the cross tube (13 ⁇ ), via a lever (74) with the shaft (31) already mentioned in the description of FIG. 2 in Connection is established and part of the operating mechanism for the height adjustment of the swivel chair.
  • the lever (74) protrudes through a slot (75) from the cross tube (13 ⁇ ), and the actuation button (73) has a beak-like extension (76) which covers the slot (75) in the rest position of the lever (74) and pinching injuries on fingers.
  • the seat frame (17) can also be tilted to a limited extent about an axis (77) when this tilting movement is released by the latching bolt (16).
  • the seat frame (17) is mounted on brackets (78) in front of the front upper edge of the cross tube (13 ⁇ ).

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

Abstract

In the swivel chair, a seat frame and a backrest frame are joined by articulation and movable with a rocking motion synchronously against spring force, and the tilt of seat and backrest can be locked in several positions. The entire mechanical system for the tripping, adjustment, and locking of the tilt of seat frame and backrest frame, for triggering the height adjustment, and for setting the rocking spring force is accommodated in a supporting tube that is bent at an obtuse angle. This supporting tube surrounds in a rotatable and displaceable fashion a base tube at the lower end, this base tube being seated on a compound base and accommodating the gas-pressure spring, and is connected at the upper end with a horizontal transverse tube extending perpendicularly to the supporting tube, this transverse tube housing the swivel axles of the seat frame as well as of the backrest frame. The pivot axle of the backrest frame is constituted by two torsion springs which are respectively fixed with a longer, angled spring leg within a tube of the bottom part of the backrest frame and are in contact, with a shorter spring leg, against an adjustably designed abutment in the upper end of the supporting tube.

Description

Die Erfindung bezieht sich auf einen Drehstuhl der im Oberbegriff des Patentanspruches 1 angegebenen Gattung.The invention relates to a swivel chair of the type specified in the preamble of claim 1.

Bei solchen Stühlen oder Sesseln, bei denen Sitz und Rückenlehne zur Ausführung von Wippbewegungen getrennt schwenkbar gelagert sind, tritt in der Regel der sogenannte "Auszieheffekt" auf, d.h. es kommt beim Wippen oder bei der Neigungsverstellung zu einer Veränderung der Strecke zwischen Sitzpunkt und Rückenanlehnungspunkt, was zur Folge hat, daß die Kleidung der den Stuhl oder Sessel benutzenden Person im Rückenbereich verschoben, z.b. das Hemd aus der Hose gezogen,wird.In the case of such chairs or armchairs, in which the seat and backrest are pivoted separately to carry out rocking movements, the so-called "pull-out effect" usually occurs, i.e. there is a change in the distance between the seat point and backrest point when rocking or adjusting the inclination, which has the consequence that the clothes of the person using the chair or armchair shifted in the back area, e.g. the shirt is pulled out of the pants.

Aus dem DE-GM 84 17 429 ist beispielsweise eine "Punktsynchronverstelleinrichtung" bekannt, mit der dieser nachteilige Effekt vermieden werden soll. Dazu ist jedoch eine aufwendige und vor allem voluminöse Mechanik unter dem Sitz vorgesehen, die außerdem das Design des Stuhles oder Sessels nicht gerade ansprechend macht.DE-GM 84 17 429, for example, discloses a "point synchronous adjustment device" with which this disadvantageous effect is to be avoided. However, an elaborate and, above all, voluminous mechanism is provided under the seat, which also does not make the design of the chair or armchair appealing.

Der Erfindung liegt die Aufgabe zugrunde, mit einer relativ einfachen und kompakt untergebrachten Wipp- bzw. Neigungsverstellmechanik das vorgeschilderte Problem des "Auszieheffektes" zu bewältigen.The invention has for its object to cope with the above-described problem of the "pull-out effect" with a relatively simple and compactly housed rocking or inclination adjustment mechanism.

Diese Aufgabe wird erfindungsgemäß durch die Kennzeichnungsmerkmale a) und b) des Patentanspruches 1 gelöst. Vorteilhafte weitere Ausgestaltungen der Erfindung sind den Unteransprüchen sowie der nachfolgenden Beschreibung der in den Zeichnungen dargestellten Ausführungsbeispiele zu entnehmen.This object is achieved by the characterizing features a) and b) of claim 1. Advantageous further refinements of the Invention can be found in the subclaims and the following description of the exemplary embodiments illustrated in the drawings.

Der erfindungsgemäße Drehstuhl bietet durch die weit nach vorne verlagerten Wippachsen von Sitz und Rückenlehne eine optimale Synchronbewegung zur Vermeidung des "Auszieheffektes" bei raumsparender und ein völlig neuartiges und dabei stabiles Stuhldesign ermöglichender Unterbringung der Gesamtmechanik, bei der kein Faltenbalg zur Abdeckung irgendwelcher Quetsch- oder Scherstellen benötigt wird. Die ausschließlich aus kostengünstigen Stahlrohren bestehende tragende Konstruktion dient als Grundgestell für eine ganze Modellfamilie, d.h. vom Stenotypistinnenstuhl bis zum schweren Chefsessel.The swivel chair according to the invention offers, by means of the rocking axes of the seat and backrest which are shifted far forward, an optimal synchronous movement to avoid the "pull-out effect" with space-saving and a completely new and stable chair design which enables the overall mechanism to be accommodated, in which no bellows to cover any crushing or shearing points is needed. The supporting structure, which consists exclusively of inexpensive steel pipes, serves as the base frame for an entire model family, i.e. from the typist's chair to the heavy executive chair.

In der Zeichnung zeigt

  • Fig. 1 einen senkrechten Schnitt durch den Drehstuhl eines ersten Ausführungsbeispiels,
  • Fig. 2 eine teilweise auf- oder abgebrochene Draufsicht des Drehstuhls nach Fig. 1,
  • Fig. 3 einen Schnitt nach der Linie III-III in Fig. 1,
  • Fig. 4 in teilweise geschnittener Seitenansicht ein zweites Ausführungsbeispiel,
  • Fig. 5 einen Schnitt durch einen Teil des Tragrohres mit der Rastriegel-Mechanik,
  • Fig. 6 die Draufsicht eines dritten Ausführungsbeispiels,
  • Fig. 7 die Frontansicht dieses Ausführungsbeispiels,
  • Fig. 8 einen Teilschnitt nach der Linie VIII-VIII in Fig. 7,
  • Fig. 9 in Frontansicht die Mechanik zum Einstellen der Vorspannung der Torsionsfedern,
  • Fig. 10 eine Draufsicht auf die Anordnung nach Fig. 9,
  • Fig. 11 eine geschnittene Seitenansicht dieser Anordnung und
  • Fig. 12 in Seitenansicht die Anordnung und Ausbildung einer Betätigungstaste
In the drawing shows
  • 1 is a vertical section through the swivel chair of a first embodiment,
  • 2 is a partially broken or broken top view of the swivel chair of FIG. 1,
  • 3 shows a section along the line III-III in FIG. 1,
  • 4 is a partially sectioned side view of a second embodiment,
  • 5 shows a section through part of the support tube with the locking bolt mechanism,
  • 6 shows the top view of a third exemplary embodiment,
  • 7 is the front view of this embodiment,
  • 8 is a partial section along the line VIII-VIII in Fig. 7,
  • 9 is a front view of the mechanism for adjusting the bias of the torsion springs,
  • 10 is a plan view of the arrangement of FIG. 9,
  • 11 is a sectional side view of this arrangement and
  • Fig. 12 in side view the arrangement and design of an actuation button

Auf einem mit einem Fußkreuz (1) des Drehstuhles fest verbundenen Standrohr (2) ist das untere Ende eines stumpfwinklig gebogenen Tragrohres (3) verschiebbar und drehbar geführt, wobei zwischen dem Standrohr (2) und dem Tragrohr (3) eine Kunststoffbuchse (4) zur Führung und zusätzlichen Abstützung vorgesehen ist. Das Standrohr (2) nimmt innen in einer Führungshülse (5) aus Kunststoff eine Gasdruckfeder (6) auf, die unten im Standrohr (2) auf einem Axialdrucklager (7) abgestützt ist und oben mit einem Konus (8) in einer Konusbuchse (9) sitzt, die bei (10) über eine Bohrung mit dem Tragrohr (3) und bei (11) mit einem in das untere Ende des Tragrohres (3) eingeschweißten Einsatzrohr (12) verschweißt wird. Mit dem oberen Ende des Tragrohres (3) ist ein Querrohr (13) fest verbunden. Dabei sind das Tragrohr (3) und das Querrohr (13) so ausgeschnitten und miteinander verschweißt, daß der lichte Querschnitt beider Rohre (3, 13) an keiner Stelle durch diese Verbindung eingeschnürt wird. Das Querrohr (13) verläuft senkrecht zum Tragrohr (3) und liegt waagerecht.The lower end of a support tube (3) which is bent at an obtuse angle is slidably and rotatably guided on a support tube (2) which is firmly connected to a base (1) of the swivel chair, a plastic bushing (4) being arranged between the support tube (2) and the support tube (3). is provided for guidance and additional support. The standpipe (2) receives a gas pressure spring (6) on the inside in a plastic guide sleeve (5), which is supported at the bottom in the standpipe (2) on an axial pressure bearing (7) and with a cone (8) in a cone bushing (9 ) is seated, which is welded at (10) through a bore to the support tube (3) and at (11) with an insert tube (12) welded into the lower end of the support tube (3). A cross tube (13) is firmly connected to the upper end of the support tube (3). The support tube (3) and the cross tube (13) are cut out and welded together so that the clear cross section of both tubes (3, 13) is not constricted at any point by this connection. The cross tube (13) runs perpendicular to the support tube (3) and lies horizontally.

Wie Fig. 1 zeigt, ist im oberen Ende des Tragrohres (3) die gesamte Mechanik für die Stuhlverstellung untergebracht. Dort ist im Tragrohr (3) ein Führungsblock (14) mit Schrauben (15) befestigt. Im Führungsblock (14) ist ein Rastriegel (16) verschiebbar gelagert, der zur Festlegung einer Neigungsstellung eines Sitzrahmens (17) und eines Rückenlehnenrahmens (18) in eine Zahnstange (19) eingreift, die beim Ausführungsbeispiel der Fign. 1 und 2 an einem Querbügel (20) des Sitzrahmens (17) befestigt ist und über eine öffnung (21) in das Tragrohr (3) hineinragt. Die Zahnstange (19) hat am freien inneren Ende einen längeren Zahn (22),der bei zurückgezogenem Rastriegel (16) an diesem anstößt, so daß die Zahnstange (19) nicht ganz aus der öffnung (21) des Tragrohres (3) herausgezogen werden kann. Dazu ist die Auslösebewegung des Rastriegels (16) durch eine Blattfeder (23) begrenzt, die bei der Demontage des Mechanismus mit einem Schraubendreher o. dgl. weggedrückt werden kann.As shown in Fig. 1, the entire mechanism for the chair adjustment is housed in the upper end of the support tube (3). There, a guide block (14) is fastened with screws (15) in the support tube (3). In the guide block (14) a locking bolt (16) is slidably mounted, which engages in a toothed rack (19) for fixing an inclined position of a seat frame (17) and a backrest frame (18), which in the embodiment of FIGS. 1 and 2 is fastened to a crossbar (20) of the seat frame (17) and projects into the support tube (3) via an opening (21). The toothed rack (19) has a longer tooth (22) at the free inner end, which abuts against it when the latching bolt (16) is withdrawn, so that the toothed rack (19) is not completely pulled out of the opening (21) of the support tube (3) can. For this purpose, the release movement of the locking bolt (16) is limited by a leaf spring (23) which can be pushed away with a screwdriver or the like when dismantling the mechanism.

Der Rastriegel (16) ist über eine Verbindungsstange (24) mit einem Hebel (25) an einer Welle (26) verbunden, die in Lagerböckchen (27, 28) innerhalb der linken Seite des Querrohres (13) gelagert ist und am äußeren Ende einen Betätigungshebel (hier nicht dargestellt) trägt, der vorne links unter dem Sitzrahmen (17) zugänglich ist. In der rechten Seite des Querrohres (13) sind weitere Lagerböckchen (29, 30) vorgesehen, in denen eine weitere mit der Welle (26) fluchtende Welle (31) gelagert ist, die zu dem Betätigungsmechanismus für die Höhenverstellung des Stuhles gehört. Ein Hebel (32) am inneren Ende der Welle (31) steht über eine Verbindungsstange (33) mit einem Winkelhebel (34) in Verbindung, der am hinteren Ende des Führungsblocks (14) gelagert ist und bei Betätigung eines vorne rechts unter dem Sitz zugänglichen Betätigungshebels (35) (Fig. 2) auf einen Stößel (36) des Ventils der Gasdruckfeder (6) drückt, um diese für die Höhenverstellung freizugeben.The locking bolt (16) is connected via a connecting rod (24) to a lever (25) on a shaft (26) which is mounted in bearing blocks (27, 28) within the left side of the cross tube (13) and one at the outer end Actuating lever (not shown here), which is accessible at the front left under the seat frame (17). In the right side of the cross tube (13) there are further bearing blocks (29, 30) in which a further shaft (31) aligned with the shaft (26) is mounted, which shaft belongs to the actuating mechanism for the height adjustment of the chair. A lever (32) at the inner end of the shaft (31) is connected via a connecting rod (33) to an angle lever (34) which is mounted at the rear end of the guide block (14) and which is accessible under the seat when actuated at the front right Actuating lever (35) (Fig. 2) presses on a tappet (36) of the valve of the gas pressure spring (6) to release it for height adjustment.

Der Sitzrahmen (17) weist am vorderen Ende auf beiden Seiten Lagerösen (37) auf, die auf in die äußeren Lagerböckchen (27, 29) einschraubbaren Zapfen (38) drehbar gelagert sind. Die Achse für die Schwenklagerung des Rückenlehnenrahmens (18) in den Lagerböckchen (27 - 30) wird durch zwei Torsionsfedern (39) gebildet, die mit je einem langen Federschenkel (40) in einem zugehörigen Rohr des unteren Teils des Rückenlehnenrahmens (18) fixiert sind. Dazu sind in diesen Rohren Buchsen (41) (s. Fig. 2) vorgesehen, und die Federschenkel (40) weisen Abflachungen (42) auf, an denen Klemmschrauben (nicht dargestellt) angreifen.The seat frame (17) has bearing eyelets (37) on both sides at the front end, which are rotatably mounted on pins (38) that can be screwed into the outer bearing blocks (27, 29). The axis for the pivot mounting of the backrest frame (18) in the bearing blocks (27-30) is formed by two torsion springs (39), each of which is fixed with a long spring leg (40) in an associated tube of the lower part of the backrest frame (18) . For this purpose, bushings (41) (see FIG. 2) are provided in these tubes, and the spring legs (40) have flats (42) on which clamping screws (not shown) engage.

Im Bereich der Verbindungsstelle zwischen dem Tragrohr (3) und dem Querrohr (13) weisen die Torsionsfedern (39) kürzere Federschenkel (43) auf, die gegen einen als Stellmutter ausgebildeten Anschlagklotz (44) drücken, der am vorderen Ende des Tragrohres (3) mit einer Rändelscheibe (45) verstellbar ist, um die Federkraft der Torsionsfedern (39) einzustellen. Der Sitzrahmen (17) und der Rückenlehnenrahmen (18) sind auf beiden Seiten durch Gelenklaschen (46) miteinander verbunden.In the area of the connection point between the support tube (3) and the cross tube (13), the torsion springs (39) have shorter spring legs (43) which press against a stop block (44) designed as an adjusting nut, which at the front end of the support tube (3) with a knurled disc (45) is adjustable to the spring force the torsion springs (39). The seat frame (17) and the backrest frame (18) are connected to one another on both sides by articulated brackets (46).

In beiden seitlichen Rohren des oberen Teils des Rückenlehnenrahmens (18) sind zusätzliche Federelemente (47) eingesetzt, auf deren freie Längen den Durchmesser der Rohre des Rückenlehnenrahmens (18) ergänzende flexible Kunststoffhüllen (48) aufgefädelt sind.In both side tubes of the upper part of the backrest frame (18), additional spring elements (47) are inserted, on the free lengths of which the flexible tubes (48) complementing the diameter of the tubes of the backrest frame (18) are threaded.

Das in Fig. 4 dargestellte Ausführungsbeispiel unterscheidet sich von dem Ausführungsbeispiel nach Fig. 1 lediglich dadurch, daß die Zahnstange (19) hier an einem Querbügel (49) des unteren Teils des Rückenlehnenrahmens (18) befestigt ist und letzterer mit dem Sitzrahmen (17) über Gummimetallpuffer (50) verbunden ist.The exemplary embodiment shown in FIG. 4 differs from the exemplary embodiment according to FIG. 1 only in that the toothed rack (19) is fastened here to a crossbar (49) of the lower part of the backrest frame (18) and the latter to the seat frame (17) is connected via a rubber-metal buffer (50).

Die Torsionsfedern (39) werden bevorzugt aus Rundstahl gefertigt, können aber auch aus Blattfederpaketen bestehen. Die nicht dargestellte Polsterung des Stuhles kann beliebig sein, da das beschriebene Stuhlgestell und seine Mechanik, wie eingangs erwähnt, als Grundgestell für eine ganze Modellfamilie dienen.The torsion springs (39) are preferably made from round steel, but can also consist of leaf spring assemblies. The upholstery of the chair, not shown, can be arbitrary, since the chair frame described and its mechanics, as mentioned at the beginning, serve as the base frame for an entire model family.

Fig. 5 zeigt im Teilschnitt eine weitere Ausführungsform des Drehstuhls. Der Rastriegel (16ʹ) steht unter der Kraft einer Feder (51), die das Bestreben hat, den Rastriegel (16ʹ) in die Zahnstange (19) einzusetzen. Eine Taste (hier nicht dargestellt) zum Auslösen des Rastriegels (16ʹ) ist als rastende Taste ausgebildet, d.h. beim ersten Drücken der Taste wird der Rastriegel (16ʹ) aus der Zahnstange (19) herausgezogen, um beim zweiten Drücken der Taste wieder freigegeben zu werden. Hierzu wird eine Rasteinrichtung mit einer unter der Kraft einer Feder (53) in zwei Ebenen schwenkbaren Klinke (54) verwendet, wie sie bei rastenden Schalttasten von elektrischen oder elektronischen Geräten üblich ist und daher im einzelnen nicht beschrieben zu werden braucht. Die Klinke (54) arbeitet mit einem Stift (55) am Rastriegel (16ʹ) zusammen.Fig. 5 shows in partial section a further embodiment of the swivel chair. The locking bolt (16ʹ) is under the force of a spring (51), which strives to insert the locking bolt (16ʹ) in the rack (19). A button (not shown here) for triggering the latch (16ʹ) is designed as a latching button, ie when the button is pressed for the first time, the latch (16ʹ) is pulled out of the rack (19) in order to be released again when the button is pressed a second time . For this purpose, a locking device is used with a pawl (54) which can be pivoted in two planes under the force of a spring (53), as is customary in the case of locking switching buttons of electrical or electronic devices and therefore in detail need not be described. The pawl (54) works together with a pin (55) on the locking bolt (16ʹ).

Bei der Ausführungsform nach den Fign. 6 und 7 stehen für die Torsionsfedern (39ʹ) größere wirksame Federlängen zur Verfügung. Dazu sitzen die äußersten Enden der Torsionsfedern (39ʹ) über Kupplungsbuchsen (56) (siehe Fig. 7 und 8) formschlüssig mit Rohren (57) in Verbindung, die die Torsionskraft in Richtung auf eine Spindelmutter (44ʹ) übertragen. Abgeflachte Enden (58) der Torsionsfedern (39ʹ) stecken in entsprechenden Flachbohrungen (59) der Kupplungsbuchsen (56). An den inneren Enden der Rohre (57)sind Haken (60) befestigt, die in hakenförmige Ansätze (61) an der Spindelmutter (44ʹ) eingreifen. Durch Verstellung einer in der Spindelmutter (44ʹ) sitzenden Stellspindel (62) mittels eines Drehknopfes (63) kann die Vorspannung der Torsionsfedern (39ʹ) eingestellt werden.In the embodiment according to FIGS. 6 and 7 are available for the torsion springs (39ʹ) longer effective spring lengths. For this purpose, the outermost ends of the torsion springs (39ʹ) are positively connected to pipes (57) via coupling bushes (56) (see FIGS. 7 and 8), which transmit the torsional force in the direction of a spindle nut (44ʹ). Flattened ends (58) of the torsion springs (39ʹ) are in corresponding flat bores (59) of the coupling bushes (56). At the inner ends of the tubes (57) hooks (60) are attached, which engage in hook-shaped lugs (61) on the spindle nut (44ʹ). The pretension of the torsion springs (39ʹ) can be adjusted by adjusting an adjusting spindle (62) seated in the spindle nut (44ʹ) by means of a rotary knob (63).

Die Fign. 9 bis 11 zeigen etwas vergrößert den Verstellungsmechanismus für die Vorspannung der Torsionsfedern (39ʹ). Am Querrohr (13ʹ) ist ein nach vorne vorstehender rechteckiger gehäuseartiger Ansatz (64) befestigt, in dem sich die Stellspindel (62) und die Spindelmutter (44ʹ) befinden. Die Stellspindel (62) weist einen Ringbund (65) auf, an dem ein Axialkugellager (66) anliegt, das sein anderes Widerlager an einer im wesentlichen rechteckigen Gegendruckscheibe (67) findet, die, wie in Fig. 10 strichpunktiert angedeutet, den Einbau der Spindel (62) mit Mutter (44ʹ) und ihren eigenen Einbau ohne Schrauben und Werkzeug ermöglicht, da die Gegendruckscheibe (67) eine erweiterte Bohrung (68) aufweist. Mit einer flachen Vertiefung (69) sitzt im montierten Zustand die Gegendruckscheibe (67) in einer Ausnehmung (70) des gehäuseartigen Ansatzes (64). In einer Rundsicke (71) der Vertiefung (69) sitzt ein Laufring (72) für das Kugellager (66), der eine der Spindel (62) angepaßte Bohrung aufweist und daher die Stellspindel (62) konzentrisch zur erweiterten Bohrung (68) der Gegendruckscheibe (67) lokalisiert, und zwar unter dem stetigen Druck der Torsionsfedern (39ʹ).The figures 9 to 11 show the adjustment mechanism for the prestressing of the torsion springs (39ʹ) somewhat enlarged. A rectangular housing-like extension (64) projecting forward is fastened to the cross tube (13ʹ) and contains the adjusting spindle (62) and the spindle nut (44ʹ). The adjusting spindle (62) has an annular collar (65) on which an axial ball bearing (66) rests, which finds its other abutment on a substantially rectangular counter-pressure disc (67), which, as indicated by dash-dotted lines in Fig. 10, the installation of the Spindle (62) with nut (44ʹ) and their own installation without screws and tools allows because the counter pressure plate (67) has an enlarged bore (68). With a flat recess (69), the counter pressure plate (67) is seated in a recess (70) of the housing-like extension (64) in the assembled state. A race (72) for the ball bearing (66), which has a bore adapted to the spindle (62) and therefore the adjusting spindle (62), sits in a circular bead (71) of the recess (69). localized concentrically to the enlarged bore (68) of the counter pressure plate (67), namely under the constant pressure of the torsion springs (39ʹ).

Fig. 12 zeigt u.a. die Anordnung und Ausbildung einer Betätigungstaste (73), die am einen Ende (hier am rechten Ende) des Querrohres (13ʹ) gelagert ist, über einen Hebel (74) mit der bereits bei der Beschreibung der Fig. 2 erwähnten Welle (31) in Verbindung steht und zum Betätigungsmechanismus für die Höhenverstellung des Drehstuhles gehört. Der Hebel (74) ragt durch einen Schlitz (75) aus dem Querrohr (13ʹ) heraus, und die Betätigungstaste (73) hat nach oben einen schnabelartigen Ansatz (76), der den Schlitz (75) in Ruhestellung des Hebels (74) überdeckt und Klemmverletzungen an Fingern verhindert.Fig. 12 shows i.a. the arrangement and design of an actuation button (73), which is mounted at one end (here at the right end) of the cross tube (13ʹ), via a lever (74) with the shaft (31) already mentioned in the description of FIG. 2 in Connection is established and part of the operating mechanism for the height adjustment of the swivel chair. The lever (74) protrudes through a slot (75) from the cross tube (13ʹ), and the actuation button (73) has a beak-like extension (76) which covers the slot (75) in the rest position of the lever (74) and pinching injuries on fingers.

Nach Fig. 12 ist ferner der Sitzrahmen (17) um eine Achse (77) begrenzt kippbar, wenn diese Kippbewegung durch den Rastriegel (16) freigegeben ist. Der Sitzrahmen (17) ist dazu auf Konsolen (78) vor dem vorderen oberen Rand des Querrohres (13ʹ) gelagert.According to FIG. 12, the seat frame (17) can also be tilted to a limited extent about an axis (77) when this tilting movement is released by the latching bolt (16). The seat frame (17) is mounted on brackets (78) in front of the front upper edge of the cross tube (13ʹ).

Claims (17)

1. Höhenverstellbarer, mit Gasdruckfeder ausgestatteter Drehstuhl, insbesondere Bürostuhl oder -sessel, bei dem ein Sitzrahmen und ein Rückenlehnenrahmen gelenkig und synchron gegen Federkraft wippbeweglich miteinander verbunden sind und die Neigung von Sitz und Rückenlehne in mehreren Stellungen feststellbar ist, gekennzeichnet durch folgende Merkmale: a) die gesamte Mechanik für das Auslösen, Einstellen und Feststellen der Neigung von Sitzrahmen (17) und Rückenlehnenrahmen (18), für das Auslösen der Höhenverstellung und für das Einstellen der Wippfederkraft ist in einem stumpfwinklig gebogenen Tragrohr (3) untergebracht, das am unteren Ende ein auf einem Fußkreuz (1) sitzendes und die Gasdruckfeder (6) aufnehmendes Standrohr (2) dreh- und verschiebbar umgibt und am oberen Ende mit einem quer zu ihm verlaufenden waagerechten Querrohr (13) verbunden ist, das die Schwenkachsen sowohl des Sitzrahmens (17) als auch des Rückenlehnenrahmens (18) aufnimmt; b) die Schwenkachse des Rückenlehnenrahmens (18) ist durch zwei Torsionsfedern (39) gebildet, die jeweils mit einem längeren abgewinkelten Federschenkel (40) in einem Rohr des unteren Teils des Rückenlehnenrahmens (18) fixiert sind und mit einem kürzeren Federschenkel (43) an einem verstellbar ausgebildeten Anschlagklotz (44) im oberen Ende des Tragrohres (3) anliegen. 1.High-adjustable swivel chair equipped with gas pressure spring, in particular office chair or armchair, in which a seat frame and a backrest frame are articulated and synchronously connected to one another in a rocking motion against spring force and the inclination of the seat and backrest can be determined in several positions, characterized by the following features: a) The entire mechanism for triggering, adjusting and determining the inclination of the seat frame (17) and backrest frame (18), for triggering the height adjustment and for adjusting the rocker spring force is housed in an obtuse-angled support tube (3), which is at the bottom End of a stand tube (2) which sits on a star base (1) and accommodates the gas pressure spring (6) in a rotatable and displaceable manner and is connected at the upper end to a horizontal cross tube (13) which runs transversely to it and which connects the pivot axes of both the seat frame ( 17) as well as the backrest frame (18); b) the pivot axis of the backrest frame (18) is formed by two torsion springs (39), each of which is fixed with a longer angled spring leg (40) in a tube of the lower part of the backrest frame (18) and with a shorter spring leg (43) an adjustable stop block (44) in the upper end of the support tube (3). 2. Drehstuhl nach Anspruch 1, dadurch gekennzeichnet, daß der Sitzrahmen (17) und der untere Teil des Rückenlehnenrahmens (18) an beiden Seiten des Stuhls über Gelenklaschen (46) miteinander verbunden sind und daß für die Neigungsverstellung eine Zahnstange (19) an einem Querbügel (20) des Sitzrahmens (17) befestigt ist, über eine öffnung (21) in das Tragrohr (3) hineinragt und in diesem mit einem in einem Führungsblock (14) verschiebbar gelagerten Rastriegel (16) zusammenwirkt.2. Swivel chair according to claim 1, characterized in that the seat frame (17) and the lower part of the backrest frame (18) are connected to one another on both sides of the chair via articulated brackets (46) and that a rack (19) on one for the inclination adjustment Cross bracket (20) of the seat frame (17) is fastened, protrudes through an opening (21) into the support tube (3) and cooperates therein with a locking bolt (16) slidably mounted in a guide block (14). 3. Drehstuhl nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Zahnstange (19) an einem Querbügel (49) des unteren Teils des Rückenlehnenrahmens (18) befestigt ist und der Sitzrahmen (17) und der untere Teil des Rückenlehnenrahmens (18) über Gummimetallpuffer (50) miteinander verbunden sind.3. Swivel chair according to claim 1 or 2, characterized in that the rack (19) on a crossbar (49) of the lower part of the backrest frame (18) is attached and the seat frame (17) and the lower part of the backrest frame (18) over Rubber metal buffers (50) are interconnected. 4. Drehstuhl nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in den sich nach beiden Seiten vom Tragrohr (3) erstreckenden Armen des waagerechten Querrohres (13) Lagerböckchen (27 - 30) für die Torsionsfedern (39) und für Wellen (26, 31) vorgesehen sind, an deren äußeren Enden je ein unter dem Sitz zugänglicher Betätigungshebel (z.B. 35) für den Rastriegel (16) der Wippmechanik auf der einen Seite und für einen am hinteren Ende des Führungsblocks (14) gelagerten Winkelhebel (34) zur Betätigung des Ventilstößels (36) der Gasdruckfeder (6) auf der anderen Seite befestigt ist.4. Swivel chair according to one of claims 1 to 3, characterized in that in the arms on both sides of the support tube (3) extending the horizontal cross tube (13) bearing blocks (27 - 30) for the torsion springs (39) and for shafts ( 26, 31) are provided, at the outer ends of which an actuating lever (eg 35) accessible under the seat for the latching bolt (16) of the rocker mechanism on one side and for an angle lever (34) mounted on the rear end of the guide block (14) for actuating the valve tappet (36) of the gas pressure spring (6) is fastened on the other side. 5. Drehstuhl nach Anspruch 4, dadurch gekennzeichnet, daß der Winkelhebel (34) zur Betätigung des Ventilstößels (36) und der Rastriegel (16) jeweils über Verbindungsstangen (24, 33) mit an den Wellen (26, 31) befestigten Hebeln (25, 32) gelenkig verbunden sind.5. Swivel chair according to claim 4, characterized in that the angle lever (34) for actuating the valve tappet (36) and the locking bar (16) each via connecting rods (24, 33) with on the shafts (26, 31) attached levers (25th , 32) are articulated. 6. Drehstuhl nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zur Begrenzung der Auslösebewegung des Rastriegels (16) am Führungsblock (14) eine Blattfeder (23) vorgesehen ist.6. Swivel chair according to one of claims 1 to 5, characterized in that a leaf spring (23) is provided on the guide block (14) to limit the release movement of the latching bolt (16). 7. Drehstuhl nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß am vorderen Ende des Sitzrahmens (17) befestigte, nach unten vorstehende Lagerösen (37) an den jeweils äußeren Lagerböckchen (27, 29) auf Zapfen (38) drehbar gelagert sind.7. Swivel chair according to one of claims 1 to 6, characterized in that attached to the front end of the seat frame (17), downwardly projecting bearing eyelets (37) on the respective outer bearing blocks (27, 29) on pins (38) are rotatably mounted . 8. Drehstuhl nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Torsionsfedern (39) aus Rundstahl bestehen.8. Swivel chair according to one of claims 1 to 7, characterized in that the torsion springs (39) consist of round steel. 9. Drehstuhl nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Torsionsfedern (39) aus Blattfederpaketen bestehen.9. Swivel chair according to one of claims 1 to 7, characterized in that the torsion springs (39) consist of leaf spring assemblies. 10. Drehstuhl nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß in dem das Standrohr (2) umgebenden unteren Ende des Tragrohres (3) eine Kunststoffbuchse (4) zur Führung und zusätzlichen Abstützung des Tragrohres (3) vorgesehen ist.10. Swivel chair according to one of claims 1 to 9, characterized in that a plastic bushing (4) for guiding and additional support of the support tube (3) is provided in the lower end of the support tube (3) surrounding the standpipe (2). 11. Drehstuhl nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß in seitlichen Rohren des oberen Teils des Rückenlehnenrahmens (18) zusätzliche Federelemente(47) eingesetzt sind.11. Swivel chair according to one of claims 1 to 10, characterized in that in side tubes of the upper part of the backrest frame (18) additional spring elements (47) are used. 12. Drehstuhl nach Anspruch 11, dadurch gekennzeichnet, daß die Federelemente (47) Rundstähle sind, auf deren freiliegende Teilstücke flexible Kunststoffhüllen (48) aufgefädelt sind, deren Außendurchmesser gleich dem der Rohre des Rückenlehnenrahmens (18) ist.12. Swivel chair according to claim 11, characterized in that the spring elements (47) are round steels, on the exposed parts of which flexible plastic sleeves (48) are threaded, the outer diameter of which is equal to that of the tubes of the backrest frame (18). 13. Drehstuhl nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß das Tragrohr (3) und das quer dazu verlaufende waagerechte Querrohr (13) so ineinander versenkt und miteinander verschweißt sind, daß der lichte Querschnitt beider Rohre (3, 13) frei ist.13. Swivel chair according to one of claims 1 to 12, characterized in that the support tube (3) and the transverse transverse tube (13) transverse thereto are sunk into one another and welded to one another in such a way that the clear cross section of both tubes (3, 13) is free is. 14. Drehstuhl nach Anspruch 13, dadurch gekennzeichnet, daß das Querrohr (13) einen abgerundeten dreieckigen Querschnitt aufweist, dessen Höhe im wesentlichen dem Durchmesser des Tragrohres (3) entspricht.14. Swivel chair according to claim 13, characterized in that the cross tube (13) has a rounded triangular cross section, the height of which essentially corresponds to the diameter of the support tube (3). 15. Drehstuhl nach Anspruch 1 oder 14, dadurch gekennzeichnet, daß der Anschlagklotz (44) als Spindelmutter (44ʹ) ausgebildet ist, in die eine Stellspindel (62) eingreift.15. Swivel chair according to claim 1 or 14, characterized in that the stop block (44) is designed as a spindle nut (44ʹ), in which an adjusting spindle (62) engages. 16. Drehstuhl nach Anspruch 1, dadurch gekennzeichnet, daß die Schwenkachse des Sitzrahmens (17) auf das Querrohr (13) aufgesetzt ist und daß zur Betätigung der Sitzneigung und der Höhenverstellung Betätigungstasten in das Querrohr (13) integriert sind, von denen die Betätigungstaste (52) für die Wippmechanik als rastende Taste ausgebildet ist.16. Swivel chair according to claim 1, characterized in that the pivot axis of the seat frame (17) is placed on the cross tube (13) and that for actuating the seat inclination and the height adjustment actuation buttons are integrated into the cross tube (13), of which the actuation button ( 52) is designed as a latching button for the rocker mechanism. 17. Drehstuhl nach Anspruch 1, dadurch gekennzeichnet, daß innerhalb des Querrohres (13ʹ) die äußeren Enden der Torsionsfedern (39ʹ) mit den einen Enden von sie locker umgebenden Rohren (57) formschlüssig verbunden sind, die an ihren anderen Enden mit Haken (60) an hakenförmigen Ansätzen (61) der Spindelmutter (44ʹ) angreifen.17. A swivel chair according to claim 1, characterized in that within the cross tube (13ʹ) the outer ends of the torsion springs (39ʹ) with one end of them loosely surrounding tubes (57) are positively connected, which at their other ends with hooks (60 ) on hook-shaped lugs (61) of the spindle nut (44ʹ).
EP87104799A 1986-05-15 1987-04-01 Rotatable chair adjustable in height and provided with a gas pressure spring, particularly an office chair Expired - Lifetime EP0247328B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104799T ATE59761T1 (en) 1986-05-15 1987-04-01 HEIGHT-ADJUSTABLE CHAIR, ESPECIALLY AN OFFICE CHAIR OR ARMCHAIR, EQUIPPED WITH GAS PRESSURE SPRING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616475 1986-05-15
DE3616475A DE3616475C1 (en) 1986-05-15 1986-05-15 Height-adjustable swivel chair equipped with gas pressure spring, in particular office chair or armchair

Publications (2)

Publication Number Publication Date
EP0247328A1 true EP0247328A1 (en) 1987-12-02
EP0247328B1 EP0247328B1 (en) 1991-01-09

Family

ID=6300953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104799A Expired - Lifetime EP0247328B1 (en) 1986-05-15 1987-04-01 Rotatable chair adjustable in height and provided with a gas pressure spring, particularly an office chair

Country Status (8)

Country Link
US (1) US4779925A (en)
EP (1) EP0247328B1 (en)
JP (1) JP2505458B2 (en)
AT (1) ATE59761T1 (en)
CA (1) CA1276099C (en)
DE (1) DE3616475C1 (en)
ES (1) ES2020524B3 (en)
NO (1) NO871378L (en)

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EP0592008A1 (en) * 1989-03-01 1994-04-13 Herman Miller, Inc. Chair height and tilt adjustment mechanisms
WO1995008284A1 (en) * 1993-09-21 1995-03-30 Fredi Dubach Chair, especially office chair

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US4840426A (en) * 1987-09-30 1989-06-20 Davis Furniture Industries, Inc. Office chair
GB9107661D0 (en) * 1991-04-11 1991-05-29 Nat Res Dev Adjustable chair
US5224758A (en) * 1989-12-27 1993-07-06 Itoki Crebio Corporation Tilting control assembly for chair
NO174135C (en) * 1990-09-05 1994-03-23 Staal & Stil As chair
CA2319884C (en) * 1992-06-15 2001-12-04 Herman Miller, Inc. Pneumatic support column for a chair
WO1995034233A1 (en) * 1994-06-10 1995-12-21 Haworth, Inc. Ergonomic chair
DE4436145A1 (en) * 1994-10-11 1996-04-18 Kusch Co Sitzmoebel Seating
US5634537A (en) * 1995-04-19 1997-06-03 Lord Corporation Locking and positioning device
US5765914A (en) * 1995-06-07 1998-06-16 Herman Miller, Inc. Chair with a tilt control mechanism
US5618021A (en) * 1995-06-07 1997-04-08 Sears Manufacturing Company Seat suspension with ride zone protection apparatus
ES2110859T3 (en) * 1996-04-22 1998-02-16 Steelcase Strafor Sa IMPROVEMENT IN THE REGULATION AND CONTROL SYSTEMS OF THE VARIOUS MOBILE AND / OR DEFORMABLE ELEMENTS OF AN OFFICE CHAIR.
US5810439A (en) * 1996-05-09 1998-09-22 Haworth, Inc. Forward-rearward tilt control for chair
US6079786A (en) * 1997-05-07 2000-06-27 Brunswick Corporation One-shot pedestal swivel seat lock/release mechanism
US6022077A (en) * 1997-05-07 2000-02-08 Brunswick Corporation One-shot pedestal swivel seat lock/release mechanism
US5918935A (en) * 1997-06-03 1999-07-06 Stulik; Edward L. Reclining chair
US5979984A (en) 1997-10-24 1999-11-09 Steelcase Development Inc. Synchrotilt chair with forwardly movable seat
US6250715B1 (en) 1998-01-21 2001-06-26 Herman Miller, Inc. Chair
US6007150A (en) 1998-03-08 1999-12-28 Milsco Manufacturing Company Motorcycle seat with adjustable backrest
US6224155B1 (en) 1999-01-12 2001-05-01 Steelcase Development Inc. Vertical height adjustment mechanism for chairs
DE19927691A1 (en) * 1999-06-17 2000-12-28 Koenig & Neurath Ag Office chair comprises support, seat and back section which can be pivoted to inclined position, back being mounted on pivot near middle of chair and second pivot nearer rear, first pivot being on same level as, or higher than, second
DE10026292C2 (en) * 1999-07-06 2003-03-20 Roeder Peter chair
EP1175854A1 (en) * 2000-07-25 2002-01-30 CO.FE.MO. S.p.A. Adjustment device for inclinable office chair and the like
US6644741B2 (en) 2001-09-20 2003-11-11 Haworth, Inc. Chair
US7396082B2 (en) * 2002-03-29 2008-07-08 Garrex Llc Task chair
US7396081B2 (en) * 2003-05-16 2008-07-08 Leggett & Platt Canada Co. Chair height adjustment mechanism
US6942080B2 (en) * 2003-12-04 2005-09-13 Tsann Kuen Enterprise Co., Ltd. Electrical appliance having a wire winding device
US6945602B2 (en) * 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for 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
US7922134B2 (en) * 2004-10-19 2011-04-12 Gasser Chair Company, Inc. Objects including gaming stools with an easy rolling support base
EP1855567B1 (en) * 2005-03-01 2015-09-23 Haworth, Inc. Tilt control mechanism for a chair
US7293832B2 (en) * 2005-08-19 2007-11-13 Chien-Kai Huang Chair adjustable device
NO324513B1 (en) * 2006-03-02 2007-11-05 Jurek Buchacz Rocker mechanism for a chair, especially an office or work chair
CN102151027B (en) 2007-01-29 2016-03-16 赫尔曼米勒有限公司 Seat structure and using method thereof
ITMI20070718A1 (en) * 2007-04-06 2008-10-07 L & P Property Management Co ADJUSTMENT DEVICE FOR ADJUSTABLE AND SIMILAR CHAIRS.
DE202008014043U1 (en) * 2008-10-22 2010-03-11 Tepe-Walser, Silvia Spring soft bearing spacers
DE102009010234A1 (en) * 2009-02-24 2010-09-02 Klöber GmbH Synchronization mechanism for office chair, has spring lever with rotation point that is arranged in lower region of plate, where front pivotable part of spring lever is directly pressed on pressure spring
WO2015161281A1 (en) 2014-04-17 2015-10-22 Hni Technologies Inc. Chair and chair control assemblies, systems, and methods
EP3927215A4 (en) 2019-02-21 2023-03-15 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

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DE1297306B (en) * 1965-07-23 1969-06-12 Dare Inglis Products Ltd Tilt chair
DE1931012A1 (en) * 1969-06-19 1970-12-23 Fritz Bauer Lifting device for infinitely variable height adjustment, especially the seat of chairs, stools or the like.
US4373692A (en) * 1980-05-01 1983-02-15 Steelcase Inc. Chair control with height adjustment actuator
DE3139448A1 (en) * 1981-10-03 1983-04-21 Kusch & Co Sitzmöbelwerke KG, 5789 Hallenberg "CHAIR"
DE3303265A1 (en) * 1983-02-01 1984-08-02 Röder GmbH Sitzmöbelwerke, 6000 Frankfurt Chair, in particular an office chair
US4575150A (en) * 1984-04-09 1986-03-11 Simodow Manufacturing Ltd. Suspension arrangement for a tilting chair

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US4560199A (en) * 1983-07-22 1985-12-24 Pamont Ag Recliner chair
DE3334424A1 (en) * 1983-09-23 1985-04-11 Girsberger AG, Bützberg OPERATING MECHANISM FOR SEAT FURNITURE
DE8417429U1 (en) * 1984-06-08 1984-09-20 Hansen, Eckard, 9430 St. Margrethen Point synchronous adjustment device for office chairs
DE3509050A1 (en) * 1984-10-24 1986-04-24 Bürositzmöbelfabrik Friedrich-W. Dauphin GmbH & Co, 8561 Offenhausen ACTUATING DEVICE FOR THE RELEASE PAD OF A LENGTH-ADJUSTABLE GAS SPRING

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DE1297306B (en) * 1965-07-23 1969-06-12 Dare Inglis Products Ltd Tilt chair
DE1931012A1 (en) * 1969-06-19 1970-12-23 Fritz Bauer Lifting device for infinitely variable height adjustment, especially the seat of chairs, stools or the like.
US4373692A (en) * 1980-05-01 1983-02-15 Steelcase Inc. Chair control with height adjustment actuator
DE3139448A1 (en) * 1981-10-03 1983-04-21 Kusch & Co Sitzmöbelwerke KG, 5789 Hallenberg "CHAIR"
DE3303265A1 (en) * 1983-02-01 1984-08-02 Röder GmbH Sitzmöbelwerke, 6000 Frankfurt Chair, in particular an office chair
US4575150A (en) * 1984-04-09 1986-03-11 Simodow Manufacturing Ltd. Suspension arrangement for a tilting chair

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592008A1 (en) * 1989-03-01 1994-04-13 Herman Miller, Inc. Chair height and tilt adjustment mechanisms
EP0592009A1 (en) * 1989-03-01 1994-04-13 Herman Miller, Inc. Chair height and tilt adjustment mechanisms
WO1995008284A1 (en) * 1993-09-21 1995-03-30 Fredi Dubach Chair, especially office chair

Also Published As

Publication number Publication date
NO871378L (en) 1987-11-16
ES2020524B3 (en) 1991-08-16
EP0247328B1 (en) 1991-01-09
JPS6365818A (en) 1988-03-24
CA1276099C (en) 1990-11-13
JP2505458B2 (en) 1996-06-12
US4779925A (en) 1988-10-25
ATE59761T1 (en) 1991-01-15
DE3616475C1 (en) 1987-06-11
NO871378D0 (en) 1987-04-02

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