EP0179216B1 - Device for operating the plunger of a pneumatic spring - Google Patents

Device for operating the plunger of a pneumatic spring Download PDF

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Publication number
EP0179216B1
EP0179216B1 EP85110290A EP85110290A EP0179216B1 EP 0179216 B1 EP0179216 B1 EP 0179216B1 EP 85110290 A EP85110290 A EP 85110290A EP 85110290 A EP85110290 A EP 85110290A EP 0179216 B1 EP0179216 B1 EP 0179216B1
Authority
EP
European Patent Office
Prior art keywords
housing part
activating
activating device
gas spring
chord
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
Application number
EP85110290A
Other languages
German (de)
French (fr)
Other versions
EP0179216A2 (en
EP0179216A3 (en
Inventor
Elke Dauphin Geb. Caplick
Konrad Wild
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.)
Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Original Assignee
Buerositzmobelfabrik Friedrich-W Dauphin & Co 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 Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH filed Critical Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Priority to AT85110290T priority Critical patent/ATE38933T1/en
Publication of EP0179216A2 publication Critical patent/EP0179216A2/en
Publication of EP0179216A3 publication Critical patent/EP0179216A3/en
Application granted granted Critical
Publication of EP0179216B1 publication Critical patent/EP0179216B1/en
Expired 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
    • A47C1/031—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
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs

Definitions

  • the invention relates to an actuating device according to the preamble of claim 1.
  • Such actuators for adjustable gas springs are z. B. used on office chairs to allow the relative movement of two chair parts to each other following the body movement of the user in a release position and on the other hand to be able to adjust a fixed position of the corresponding chair parts to each other if desired in a locking position.
  • the trigger plunger of the gas spring which is arranged in this longitudinally displaceable, must be able to be held in two different positions.
  • an operating lever which acts on the release plunger and can be fixed in two different end positions by means of a link guide.
  • the object of the invention is to design an actuating device of the type in question in such a way that the actuating lever can be handled as simply as possible, which in particular should also be possible without visual inspection or coordination of the actuating process.
  • the device should enable a defined actuation and secure fixation of the end positions with a simple and inexpensive construction.
  • the ball provided according to the invention slides relatively smoothly from one end position to the other, i. H. from a recess of the actuating lever section into the other, but on the other hand it is ensured that the formation of a pronounced dead center position between the end positions prevents accidental adjustment.
  • the configuration according to the invention enables the handling, ie. H. So the release of lockable gas springs, so that a so-called biofeedback takes place, so that the desired mechanical movement result largely coincides with the natural body movement, so that the internal resistance of the user against the mechanical handling that is initially foreign to him is as low as possible.
  • the configuration according to claim 2 ensures that the actuating lever can be easily mounted on the actuating device, but that no additional means for axially fixing the actuating lever are required, since this is accomplished in each of the end positions by the ball engaging in a recess acts as an axial lock.
  • the swivel angle limitation provided according to claim 3 ensures that the user finds the actuating lever in a defined end position and that only predetermined actuating movements are possible over the angular range between the two recesses, so that the user does not have to orientate himself about the angular position of the actuating lever.
  • the pivoting angle limiting device is designed in a particularly simple and functionally extremely satisfactory manner.
  • the basic idea of this construction is therefore that a part of the second housing part which deviates from the round cross-sectional shape acts as a stop for the end of the actuating lever section which is flattened on one side. Accordingly, the circular chord-like delimitation of the end of the cylinder bore or the end of the fastening lever section provided according to the invention does not necessarily have to be exactly linear.
  • the measure according to claim 5 enables particularly simple manufacture and assembly of the second housing part.
  • annular groove - allows the inclusion of a snap ring and thus in connection with a corresponding annular groove at the other end of the second housing part, an attachment of the same z. B. in an office chair.
  • Claims 7 and 8 indicate particularly simple possibilities for achieving an embodiment according to the invention.
  • Claim 9 specifies a particularly favorable embodiment of the connecting device between the housing of the actuating device and the piston of the gas spring, since this enables the actuation points to be optimally adjusted and this setting to be fixed during assembly.
  • Claim 10 specifies a preferred use of an actuating device according to the invention.
  • FIG. 1 An office chair shown in FIG. 1 comprises a base frame 1 with a support column 2 which is connected to a seat support 4 receiving the upholstered seat 3.
  • a seat support 4 receiving the upholstered seat 3.
  • Fig. 1 only the lining 5 of the seat support 4 is shown.
  • the housing end of a gas spring 10 has an annular sleeve 11, which is penetrated by a bolt 12 which is fixed in the side walls 13, 14 of the backrest support member 7.
  • the piston rod 15 projects out of its housing, the free end 16 of which is provided with an external thread 17.
  • An actuating device 18 has first and second housing parts 19 and 20, which are each cylindrical.
  • the first housing part 19 is provided with an internal thread 21, into which the external thread 17 of the piston rod 15 is screwed.
  • the second housing part 20 is provided with an inner cylinder bore 22, in which a section 23 of an actuating lever 24 is guided.
  • the actuating lever section 23 has two recesses 25 and 25 'of different depths t and t 2 .
  • End parts 28, 29 are screwed onto the two end faces 26, 27 of the second housing part 20, each with the formation of annular grooves 30, 31.
  • One end part 29 is compressed from the outside in the direction of arrow 32 in such a way that, as can be seen in particular from FIG. 5, the originally circular cross section is reduced with the formation of a chord 33.
  • the corresponding end 34 of the actuating lever section 23 has an outwardly open recess 35 such that between the chord 36 delimiting this recess 35 and the chord 33 there is an intermediate space a which pivots the actuating lever section 23 by approximately 90 ° enables, on the other hand, however, a pivot angle limitation is achieved in that the chord 36 strikes against the chord 33 when rotating from the position shown in Fig. 5.
  • the deeper recess 25 is below the piston 15, while in the corresponding left end position, the shallower recess 25 'is below the piston 15.
  • An axially movable trigger plunger 37 is arranged at the lower end 16 of the piston 15. Between the lower end of the trigger plunger 37 and the operating lever section 23, a ball 38 is arranged such that it is in contact with the trigger plunger 37 on the one hand and with the operating lever section 23 on the other hand.
  • the ball 38 By pivoting the actuating lever 24 from the position shown in FIG. 4 in the direction of arrow 39, the ball 38 is first lifted out of the recess 25 and then after a pivoting movement by approximately 90 ° into the recess 25 ′ with the depth t 2 to slide.
  • the difference in depths t, minus t 2 has the result that the trigger plunger 37 is moved down by the difference. This means that by switching from one end position of the actuating lever section 23 to the other, the trigger plunger 37 can be switched from one switching state (trigger lock) to the other, being stable in both end positions.
  • the ball 38 Since the ball 38 is fixed in the axial direction with respect to the longitudinal axis of the second housing part 20 by the housing part 19 and is pressed either into the recess 25 or 25 'of the actuating lever section 23 by the release plunger 37, the ball acts as a bolt against axial displacement of the actuating lever (24) in the second housing section 20, so that in this respect no additional locking devices have to be provided.
  • the actuating device 18 When the actuating device 18 is mounted on the gas spring, the latter is screwed to the piston 15 of the gas spring, the desired contact force of the trigger plunger 37 on the ball 38 being able to be set in this assembly process by means of a lock nut 40.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Fluid-Damping Devices (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Valve Device For Special Equipments (AREA)
  • Pipe Accessories (AREA)
  • Actuator (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

An activating device for the release tappet of a longitudinally adjustable gas spring. The device is shiftable parallel to the longitudinal axis of the gas spring between a fixed and a release position, and comprises an activating lever fixable in two end pistons. A device connecting the piston of the gas spring with a first housing part of the activating contrivance is effected so that a release tappet projects into a first housing part by means of a ball beneath the release tappet. A second housing part is located beneath the first housing part and the ball in contact therewith. A pivotably stored activating lever section is provided with angularly transposed, coordinated recesses of different depths.

Description

Die Erfindung richtet sich auf eine Betätigungsvorrichtung gemäß dem Oberbegriff von Anspruch 1.The invention relates to an actuating device according to the preamble of claim 1.

Derartige Betätigungsvorrichtungen für längenverstellbare Gasfedern werden z. B. an Bürostühlen eingesetzt, um in einer Auslösestellung die Relativbewegung zweier Stuhlteile zueinander der Körperbewegung des Benutzers folgend zu ermöglichen und um andererseits auf Wunsch in einer Arretierstellung eine feste Lage der entsprechenden Stuhlteile zueinander einstellen zu können.Such actuators for adjustable gas springs are z. B. used on office chairs to allow the relative movement of two chair parts to each other following the body movement of the user in a release position and on the other hand to be able to adjust a fixed position of the corresponding chair parts to each other if desired in a locking position.

Hierzu muß der Auslösestößel der Gasfeder, welcher in dieser längsverschiebbar angeordnet ist, in zwei verschiedenen Stellungen festgehalten werden können. Um dies zu bewerkstelligen, ist es bekannt, einen Betätigungshebel zu verwenden. welcher auf den Auslösestößel einwirkt und mittels einer Kulissenführung in zwei unterschiedlichen Endlagen festlegbar ist.For this purpose, the trigger plunger of the gas spring, which is arranged in this longitudinally displaceable, must be able to be held in two different positions. To do this, it is known to use an operating lever. which acts on the release plunger and can be fixed in two different end positions by means of a link guide.

Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Betätigungsvorrichtung der in Betracht stehenden Art so auszugestalten, daß eine möglichst einfache Handhabung des Betätigungshebels möglich wird, welche insbesondere auch ohne visuelle Überprüfung oder Koordinierung des Betätigungsvorganges möglich sein soll. Darüber hinaus soll die Vorrichtung bei einfacher und kostengünstiger Konstruktion eine definierte Betätigung und sichere Fixierung der Endlagen ermöglichen.Proceeding from this, the object of the invention is to design an actuating device of the type in question in such a way that the actuating lever can be handled as simply as possible, which in particular should also be possible without visual inspection or coordination of the actuating process. In addition, the device should enable a defined actuation and secure fixation of the end positions with a simple and inexpensive construction.

Diese Aufgabe wird gelöst durch den kennzeichnenden Teil von Anspruch 1. Durch die erfindungsgemäße Ausgestaltung erfordert die Handhabung der Bestätigungsvorrichtung lediglich eine einfache Schwenkbewegung um einen beschränkten Winkelbereich von z. B. 90°. Eine derartige Bewegung kann ohne Hinsehen und ohne daß es insoweit besonderer Aufmerksamkeit bedarf z. B. von dem Benutzer eines Bürostuhls auch dann durchgeführt werden, wenn er eine entsprechende Einstellungsänderung nicht sehr häufig vornimmt. Genau dies ist aber Voraussetzung dafür, daß die von der Konstruktion her möglichen und dem Benutzer angebotenen Einstellmöglichkeiten mit dem damit verbundenen Komfort von diesem auch wahrgenommen werden.This object is achieved by the characterizing part of claim 1. Due to the configuration according to the invention, the handling of the confirmation device only requires a simple pivoting movement around a limited angular range of z. B. 90 °. Such a movement can be done without looking and without special attention z. B. be carried out by the user of an office chair even if he does not make a corresponding setting change very often. Exactly this is, however, a prerequisite for the fact that the setting options that are possible from the construction and are offered to the user with the associated comfort are also perceived by the user.

Darüber hinaus gleitet die erfindungsgemäß vorgesehene Kugel verhältnismäßig weich von einer Endposition in die andere, d. h. von einer Ausnehmung des Betätigungshebel-Abschnitts in die andere, wobei andererseits aber sichergestellt ist, daß durch die Ausbildung einer ausgesprochenen Totpunktlage zwischen den Endlagen eine versehentliche Verstellung vermieden wird.In addition, the ball provided according to the invention slides relatively smoothly from one end position to the other, i. H. from a recess of the actuating lever section into the other, but on the other hand it is ensured that the formation of a pronounced dead center position between the end positions prevents accidental adjustment.

Insbesondere bei Verwendung eines gekröpften Betätigungshebels ermöglicht es die erfindungsgemäße Ausgestaltung, die Handhabung, d. h. also das Lösen arretierbarer Gasfedern, so vorzunehmen, daß ein sogenanntes Biofeedback stattfindet, daß also das angestrebte mechanische Bewegungsergebnis sich mit der natürlichen Körperbewegung weitgehend deckt, so daß der innere Widerstand des Benutzers gegen die ihm zunächst fremde mechanische Handhabung möglichst gering ist.In particular when using a cranked actuating lever, the configuration according to the invention enables the handling, ie. H. So the release of lockable gas springs, so that a so-called biofeedback takes place, so that the desired mechanical movement result largely coincides with the natural body movement, so that the internal resistance of the user against the mechanical handling that is initially foreign to him is as low as possible.

Durch die Ausgestaltung nach Anspruch 2 wird erreicht, daß der Betätigungshebel an der Betätigungsvorrichtung einfach montiert werden kann, daß aber keine zusätzlichen Mittel zur axialen Fixierung des Betätigungshebels erforderlich sind, da diese jeweils in den Endlagen dadurch bewerkstelligt wird, daß die in eine Ausnehmung eingreifende Kugel als axiale Verriegelung wirkt.The configuration according to claim 2 ensures that the actuating lever can be easily mounted on the actuating device, but that no additional means for axially fixing the actuating lever are required, since this is accomplished in each of the end positions by the ball engaging in a recess acts as an axial lock.

Die gemäß Anspruch 3 vorgesehene Schwenkwinkelbegrenzung stellt sicher, daß der Benutzer den Betätigungshebel jeweils in einer definierten Endstellung vorfindet und lediglich vorbestimmte Betätigungsbewegungen über den Winkelbereich zwischen den beiden Ausnehmungen möglich sind, so daß sich der Benutzer nicht über die Winkellage des Betätigungshebels erst orientieren muß.The swivel angle limitation provided according to claim 3 ensures that the user finds the actuating lever in a defined end position and that only predetermined actuating movements are possible over the angular range between the two recesses, so that the user does not have to orientate himself about the angular position of the actuating lever.

In besonders einfacher und gleichwohl funktionell äußerst befriedigender Weise wird die Schwenkwinketbegrenzungseinricntung gemäß Anspruch 4 ausgebildet. Der Grundgedanke dieser Konstruktion besteht also darin, daß ein von der runden Querschnittsform abweichender Teil des zweiten Gehäuseteils als Anschlag wirkt für das an einer Seite abgeflachte Ende des Betätigungshebel-Abschnitts. Dementsprechend muß die erfindungsgemäß vorgesehene kreissehnenartige Begrenzung des Endes der Zylinderbohrung bzw. des Endes des Befestigungshebelabschnitts nicht notwendigerweise exakt linear verlaufen.The pivoting angle limiting device is designed in a particularly simple and functionally extremely satisfactory manner. The basic idea of this construction is therefore that a part of the second housing part which deviates from the round cross-sectional shape acts as a stop for the end of the actuating lever section which is flattened on one side. Accordingly, the circular chord-like delimitation of the end of the cylinder bore or the end of the fastening lever section provided according to the invention does not necessarily have to be exactly linear.

Durch die Maßnahme entsprechend Anspruch 5 wird eine besonders einfache Herstellung und Montage des zweiten Gehäuseteils ermöglicht.The measure according to claim 5 enables particularly simple manufacture and assembly of the second housing part.

Die gemäß Anspruch 6 ausgebildete Ringnut - ermöglicht die Aufnahme eines Sprengrings und damit in Verbindung mit einer entsprechenden Ringnut am jeweils anderen Ende des zweiten Gehäuseteils eine Befestigung desselben z. B. in einem Bürostuhl.The designed according to claim 6 annular groove - allows the inclusion of a snap ring and thus in connection with a corresponding annular groove at the other end of the second housing part, an attachment of the same z. B. in an office chair.

Die Ansprüche 7 und 8 geben besonders einfache Möglichkeiten zur Erzielung einer erfindungsgemäßen Ausgestaltung an.Claims 7 and 8 indicate particularly simple possibilities for achieving an embodiment according to the invention.

Anspruch 9 gibt eine besonders günstige Ausgestaltung der Verbindungseinrichtung zwischen dem Gehäuse der Betätigungsvorrichtung und dem Kolben der Gasfeder an, da hierdurch bei der Montage problemlos eine optimale Einstellung der Betätigungspunkte und eine Fixierung dieser Einstellung erfolgen kann.Claim 9 specifies a particularly favorable embodiment of the connecting device between the housing of the actuating device and the piston of the gas spring, since this enables the actuation points to be optimally adjusted and this setting to be fixed during assembly.

Anspruch 10 gibt eine bevorzugte Verwendung einer erfindungsgemäßen Betätigungsvorrichtung an.Claim 10 specifies a preferred use of an actuating device according to the invention.

Weitere Vorteile und Einzelheiten der Erfindung ergeben sich aus der folgenden Beschreibung einer bevorzugten Ausführungsform anhand der Zeichnung. Dabei zeigen

  • Fig. 1 eine Seitenansicht eines Bürostuhls, bei welchem die erfindungsgemäße Betätigungsvorrichtung verwendet wird,
  • Fig. 2 eine Seitenansicht, welche die Anordnung einer erfindungsgemäßen Betätigungsvorrichtung an einer zur Dämpfung der Schwenkbewegung der Rückenlehne dienenden Gasfeder zeigt,
  • Fig. 3 eine Seitenansicht des Gehäuses der erfindungsgemäßen Betätigungsvorrichtung,
  • Fig. 4 eine teilweise aufgebrochene Seitenansicht der mit dem Kolben einer Gasfeder verschraubten erfindungsgemäßen Befestigungsvorrichtung, und
  • Fig. 5 eine Ansicht des einen Endes des einen Gehäuseteils der erfindungsgemäßen Betätigungsvorrichtung.
Further advantages and details of the invention emerge from the following description of a preferred embodiment with reference to the drawing. Show
  • Fig. 1 is a side view of an office chair, at which the actuating device according to the invention is used,
  • 2 is a side view showing the arrangement of an actuating device according to the invention on a gas spring used to dampen the pivoting movement of the backrest,
  • 3 shows a side view of the housing of the actuating device according to the invention,
  • Fig. 4 is a partially broken side view of the fastening device screwed to the piston of a gas spring according to the invention, and
  • Fig. 5 is a view of one end of a housing part of the actuating device according to the invention.

Ein in Fig. 1 dargestellter Bürostuhl umfaßt ein Fußgestell 1 mit einer Tragsäule 2, welche mit einem den gepolsterten Sitz 3 aufnehmenden Sitzträger 4 verbunden ist. In Fig. 1 ist lediglich die Verkleidung 5 des Sitzträgers 4 dargestellt.An office chair shown in FIG. 1 comprises a base frame 1 with a support column 2 which is connected to a seat support 4 receiving the upholstered seat 3. In Fig. 1, only the lining 5 of the seat support 4 is shown.

Mit dem Sitzträger 4 um eine Schwenkachse 6 schwenkbar verbunden ist ein Rückenlehnentrageteil 7, an welchem die die Rückenlehne 8 tragende Rückenlehnentragsäule 9 befestigt ist.A backrest support part 7, to which the backrest support column 9 carrying the backrest 8 is fastened, is connected to the seat support 4 so as to be pivotable about a pivot axis 6.

Das gehäuseseitige Ende einer Gasfeder 10 weist eine Ringhülse 11 auf, welche von einem Bolzen 12 durchsetzt wird, der in den Seitenwänden 13, 14 des Rückenlehnentrageteils 7 festgelegt ist.The housing end of a gas spring 10 has an annular sleeve 11, which is penetrated by a bolt 12 which is fixed in the side walls 13, 14 of the backrest support member 7.

Am anderen Ende der Gasfeder 10 ragt aus deren Gehäuse die Kolbenstange 15 heraus, deren freies Ende 16 mit einem Außengewinde 17 versehen ist.At the other end of the gas spring 10, the piston rod 15 projects out of its housing, the free end 16 of which is provided with an external thread 17.

Eine Betätigungsvorrichtung 18 weist ein erstes und zweites Gehäuseteil 19 bzw. 20 auf, welche jeweils zylinderförmig ausgebildet sind.An actuating device 18 has first and second housing parts 19 and 20, which are each cylindrical.

Das erste Gehäuseteil 19 ist mit einem Innengewinde 21 versehen, in welches das Außengewinde 17 der Kolbenstange 15 eingeschraubt ist.The first housing part 19 is provided with an internal thread 21, into which the external thread 17 of the piston rod 15 is screwed.

Das zweite Gehäuseteil 20 ist mit einer inneren Zylinderbohrung 22 versehen, in welcher ein Abschnitt 23 eines Betätigungshebels 24 geführt ist.The second housing part 20 is provided with an inner cylinder bore 22, in which a section 23 of an actuating lever 24 is guided.

Der Betätigungshebel-Abschnitt 23 weist zwei Ausnehmungen 25 und 25' von unterschiedlicher Tiefe t, bzw. t2 auf.The actuating lever section 23 has two recesses 25 and 25 'of different depths t and t 2 .

An den beiden Stirnseiten 26, 27 des zweiten Gehäuseteils 20 sind Endteile 28, 29 jeweils unter Ausbildung von Ringnuten 30, 31 aufgeschraubt. Das eine Endteil 29 ist von außen her in Richtung des Pfeils 32 derart gestaucht, daß, wie insbesondere aus Fig. 5 erkennbar wird, der ursprünglich kreisförmige Querschnitt unter Ausbildung einer Sehne 33 vermindert wird. Das korrespondierende Ende 34 des Betätigungshebel-Abschnitts 23 weist eine nach außen offene Ausnehmung 35 derart auf, daß zwischen der diese Ausnehmung 35 begrenzenden Sehne 36 und der Sehne 33 ein Zwischenraum a entsteht, welcher eine Schwenkbewegung des Betätigungshebel-Abschnitts 23 um ca. 90° ermöglicht, wobei andererseits aber auch eine Schwenkwinkelbegrenzung dadurch erreicht wird, daß bei einem Verdrehen aus der in Fig. 5 dargestellten Position die Sehne 36 gegen die Sehne 33 anschlägt. In der dementsprechend vollständig bis zum Anschlag nach rechts geschwenkten Stellung, wie sie in Fig. 4 dargestellt ist, liegt die tiefere Ausnehmung 25 unterhalb des Kolbens 15, während in der entsprechenden linken Endstellung die flachere Ausnehmung 25' unterhalb des Kolbens 15 liegt.End parts 28, 29 are screwed onto the two end faces 26, 27 of the second housing part 20, each with the formation of annular grooves 30, 31. One end part 29 is compressed from the outside in the direction of arrow 32 in such a way that, as can be seen in particular from FIG. 5, the originally circular cross section is reduced with the formation of a chord 33. The corresponding end 34 of the actuating lever section 23 has an outwardly open recess 35 such that between the chord 36 delimiting this recess 35 and the chord 33 there is an intermediate space a which pivots the actuating lever section 23 by approximately 90 ° enables, on the other hand, however, a pivot angle limitation is achieved in that the chord 36 strikes against the chord 33 when rotating from the position shown in Fig. 5. In the correspondingly fully pivoted to the right to the stop position, as shown in Fig. 4, the deeper recess 25 is below the piston 15, while in the corresponding left end position, the shallower recess 25 'is below the piston 15.

Am unteren Ende 16 des Kolbens 15 ist ein axial beweglicher Auslösestößel 37 angeordnet. Zwischen dem unteren Ende des Auslösestößels 37 und dem Betätigungshebelabschnitt 23 ist eine Kugel 38 derart angeordnet, daß sie in Berührung einerseits mit dem Auslösestößel 37 und andererseits mit dem Betätigungshebel-Abschnitt 23 steht.An axially movable trigger plunger 37 is arranged at the lower end 16 of the piston 15. Between the lower end of the trigger plunger 37 and the operating lever section 23, a ball 38 is arranged such that it is in contact with the trigger plunger 37 on the one hand and with the operating lever section 23 on the other hand.

Durch ein Verschwenken des Betätigungshebels 24 aus der in Fig. 4 dargestellten Position in Richtung des Pfeils 39 wird die Kugel 38 zunächst aus der Ausnehmung 25 angehoben, um dann nach einer Schwenkbewegung um ca. 90° in die Ausnehmung 25' mit der Tiefe t2 zu gleiten. Die Differenz der Tiefen t, minus t2 hat zur Folge, daß der Auslösestößel 37 um den Differenzbetrag nach unten bewegt wird. Dies bedeutet, daß durch das « Umschalten von einer Endlage des Betätigungshebelabschnitts 23 in die andere der Auslösestößel 37 von einem Schaltzustand (Auslösen-Sperren) in den anderen gebracht werden kann, wobei er in beiden Endlagen stabil ist.By pivoting the actuating lever 24 from the position shown in FIG. 4 in the direction of arrow 39, the ball 38 is first lifted out of the recess 25 and then after a pivoting movement by approximately 90 ° into the recess 25 ′ with the depth t 2 to slide. The difference in depths t, minus t 2 has the result that the trigger plunger 37 is moved down by the difference. This means that by switching from one end position of the actuating lever section 23 to the other, the trigger plunger 37 can be switched from one switching state (trigger lock) to the other, being stable in both end positions.

Da die Kugel 38 durch das Gehäuseteil 19 in axialer Richtung hinsichtlich der Längsachse des zweiten Gehäuseteils 20 fixiert ist und durch den Auslösestößel 37 entweder in die Ausnehmung 25 oder 25' des Betätigungshebel-Abschnitts 23 hineingedrückt wirch, wirkt die Kugel als Riegel gegen eine axiale Verschiebung des Betätigungshebels (24) in dem zweiten Gehäuseabschnitt 20, so daß insoweit keine zusätzlichen Arretierungseinrichtungen vorgesehen werden müssen. Bei der Montage der Betätigungsvorrichtung 18 an der Gasfeder wird diese mit dem Kolben 15 der Gasfeder verschraubt, wobei durch eine Kontermutter 40 bei diesem Montagevorgang problemlos die gewünschte Anlagekraft des Auslösestößels 37 an der Kugel 38 eingestellt werden kann.Since the ball 38 is fixed in the axial direction with respect to the longitudinal axis of the second housing part 20 by the housing part 19 and is pressed either into the recess 25 or 25 'of the actuating lever section 23 by the release plunger 37, the ball acts as a bolt against axial displacement of the actuating lever (24) in the second housing section 20, so that in this respect no additional locking devices have to be provided. When the actuating device 18 is mounted on the gas spring, the latter is screwed to the piston 15 of the gas spring, the desired contact force of the trigger plunger 37 on the ball 38 being able to be set in this assembly process by means of a lock nut 40.

Die Montage der Betätigungsvorrichtung 18 und damit letztlich auch des entsprechenden Endes der Gasfeder 10 erfolgt dadurch, daß die Endteile 28, 29 des zweiten Gehäuseabschnitts 20 in korrespondierende Bohrungen in den Seitenwänden 41, 42 des Sitzträgers 4 eingesetzt und eine axiale Fixierung durch in die Nuten 30, 31 eingesetzte Sprengringe vorgenommen wird.The assembly of the actuating device 18 and thus ultimately also of the corresponding end of the gas spring 10 takes place in that the end parts 28, 29 of the second housing section 20 are inserted into corresponding bores in the side walls 41, 42 of the seat support 4 and are axially fixed in the grooves 30 , 31 used snap rings is made.

Claims (10)

1. An activating device for the release tappet (37) of a longitudinally adjustable gas spring (10), which is shiftable parallel to the longitudinal axis of the gas spring (10) between a fixed position and a release position, the device comprising an activating lever which is positionable in two end positions, characterized by means (outside thread 16, inside thread 17) for connecting the piston (15) of the gas spring (10) with a first housing part (19) of the activating device (18) thus that a release tappet (37) projects into the first housing part (19) by a ball (38) arranged in this first housing part (19) beneath the release tappet (37) and, standing in contact with the release tappet (37), by a second housing part (20) beneath the first housing part (19), and by a pivotable supported activating lever section (23) in the second housing part (20) beneath the first housing part (19), the ball (38) remaining in contact with recesses (25, 25'), angularly offset to each other, of varying depths (t, and t2, respectively).
2. An activating device according to claim 1, characterized in that the activating lever section (23) is stored in a cylindrical boring (22) of the second housing part (20).
3. An activating device according to claim 2, characterized in that a pivot angle limiting device for the activating lever (24) is arranged in the second housing part (20).
4. An activating device according to claim 3, characterized in that the pivot angle limiting device is formed such that one end (end part 29) of the second housing part (20) exhibits along the length of a circular chord (33) a reduced cross section of the boring in the cylinder (22), and that the end (34) of the activating device abutting the chord (36) exhibits along the length of a circular chord a recess (35) such that, between the limiting chord (33) of the cylinder boring (22) and the limiting chord (36) of the end (34) of the activating section (23), there remains a definable free play (a) for a pivot angle.
5. An activating device according to claim 4, characterized in that at least one end of the second housing (20) is formed as an unscrewable end part (29).
6. An activating device according to claim 5, characterized in that the end part (29 and 28, respectively) is unscrewable through a ring groove (30 and 31, respectively).
7. An activating device according to one of the claims 4 to 6, characterized in that a clear opening of the end part (29) is diminished by rolling.
8. An activating device according to one of the claims 1 to 7, characterized in that the first and second housing parts (19, 20) are made in cylindrical form and are welded together.
9. An activating device according to one of the claims 1 to 8, characterized in that the connecting device is made as a thread connection (outside thread 17, inside thread 21) with a counter nut (40).
10. Use of an activating device according to one of the claims 1 to 9 in combination with a gas spring for damping the pivotal movement of the back rest of an office chair.
EP85110290A 1984-10-24 1985-08-17 Device for operating the plunger of a pneumatic spring Expired EP0179216B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110290T ATE38933T1 (en) 1984-10-24 1985-08-17 ACTUATION DEVICE FOR THE RELEASE PUSHER OF A LENGTH-ADJUSTABLE GAS SPRING.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3438843 1984-10-24
DE3438843 1984-10-24
DE3509050 1985-03-14
DE19853509050 DE3509050A1 (en) 1984-10-24 1985-03-14 ACTUATING DEVICE FOR THE RELEASE PAD OF A LENGTH-ADJUSTABLE GAS SPRING

Publications (3)

Publication Number Publication Date
EP0179216A2 EP0179216A2 (en) 1986-04-30
EP0179216A3 EP0179216A3 (en) 1987-04-29
EP0179216B1 true EP0179216B1 (en) 1988-11-30

Family

ID=25825903

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110290A Expired EP0179216B1 (en) 1984-10-24 1985-08-17 Device for operating the plunger of a pneumatic spring

Country Status (4)

Country Link
US (1) US4662680A (en)
EP (1) EP0179216B1 (en)
AT (1) ATE38933T1 (en)
DE (2) DE3509050A1 (en)

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Also Published As

Publication number Publication date
DE3509050A1 (en) 1986-04-24
EP0179216A2 (en) 1986-04-30
ATE38933T1 (en) 1988-12-15
EP0179216A3 (en) 1987-04-29
US4662680A (en) 1987-05-05
DE3566494D1 (en) 1989-01-05

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