EP0813378B1 - Height-adjustment of back-rest - Google Patents
Height-adjustment of back-rest Download PDFInfo
- Publication number
- EP0813378B1 EP0813378B1 EP96946053A EP96946053A EP0813378B1 EP 0813378 B1 EP0813378 B1 EP 0813378B1 EP 96946053 A EP96946053 A EP 96946053A EP 96946053 A EP96946053 A EP 96946053A EP 0813378 B1 EP0813378 B1 EP 0813378B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- backrest support
- spring
- housing
- height adjuster
- detent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/402—Support for the head or the back for the back adjustable in height
Definitions
- the invention relates to a height adjustment for Backrests with the characteristics of the generic term of Claim 1.
- the object of the present invention is a Height adjustment of the type mentioned at the beginning create a high ease of use, as well as a has a safe function.
- the Means for preventing lateral play of the Two backrest bearer with their bevels adjacent wedges, their parallel outer sides on the housing wall on the one hand and on one side of the Backrest bear on the other hand and the the wedge on the housing wall on its wider End is loaded by a spring.
- the loaded wedge presses with its slant on the Bevel of the wedge resting on the backrest support, see above that a force acts laterally on the backrest support and this to be in contact with the housing or with it connected part brings.
- the backrest holder can do this slide without play.
- a base plate is attached in the housing, in which the other side of the backrest support and the Spring for the wedge against the housing wall supports.
- the base plate has guide means such as Example grooves, for guide parts, for example pins, of the wedge resting on the backrest support.
- Latching means a locking arm, which when the backrest support is pulled clicks upwards, but when inserted releases again.
- This locking arm can, for example be pivotally mounted in the base plate.
- FIGS. 1 to 6c The height adjustment shown in FIGS. 1 to 6c from a flat housing 1 with essentially rectangular cross-section in which a flat Backrest support 2 is slidably guided and clampable.
- the case can be extended and with a bottom Be connected to the seat support.
- Others can Have dimensions as shown and curved be executed.
- the backrest support 2 points along its central axis a series of holes 3 on the respective Define insertion depth.
- a locking ball 4 which is from a clamping slope 5 ' a boat 5 is pressed into the bore.
- the Pressing pressure results from a spring 6, which is in a base plate 7 which is supported in the housing 1, for example by screws 17 or locking lugs, is attached.
- the base plate 7 also has a groove 16 on, in which the boat 5 can slide and on the the spring 6 opposite side a stop finds.
- Push button 8 with which it acts against the force of the spring 6 can be pushed back, whereupon the clamping slope 5 ' the ball 4 releases and the backrest are moved can until the desired insertion depth is reached and button 8 is released again.
- the button 8 has a flat recess 8 'into which a small Spring 9 engages during assembly so that the button 8 can no longer be pulled out. This measure prevents the buttons 8 and offers the opportunity in the same Height adjustment easily designed differently To be able to use buttons. Since the base plate 7 is preferably made of plastic is in the Area in which the ball 4 against the bevel 5 ' presses a metal disc 21 embedded to one to ensure permanent function.
- the base plate 7 extends from the side of the Button 8 from over the large part of the base of Housing 1 and has a tread and Stop edge for the backrest support 2.
- the backrest support 2 lies on a step 11 'of the straight side of a wedge 11 with its Slope 11 '' on the slope 10 '' of a second wedge 10 is applied, which in turn with its straight side on the The inner wall of the housing is in contact.
- the second wedge 10 is on its broad end by a compression spring 12 acts in a projection 13 of the Base plate supported.
- the spring 12 presses the wedge 10 1 upwards, which means about the slopes 10 '' and 11 '' exert a lateral force on the Backrest support 2 is guided, which is performed without play is.
- the base plate 7 has grooves 15 which for first wedge 11 are open and guide pin 14 record sliding (Fig. 4c and 4e). So this is Wedge 11 out and can not avoid.
- the height adjustment is with a pull-out protection provided, shown offset in Figs. 1 and 3 is.
- This pull-out protection has a bore 22, which is actually next to the last hole 3 for the Locking ball, or in Fig. 1 should still be below.
- This bore 22 is in a recess 18
- Base plate 7 a pivotable locking arm 19 is arranged, of a spring supported in the base plate 7 20 is so acted that its latch 19 '- as in 3, is pressed into the bore 22, as soon as the backrest is pulled out far enough. The backrest is then blocked.
- the insertion is from the locking arm 19 is not hindered, since it in this Direction has a slope.
Description
Die Erfindung betrifft eine Höhenverstellung für
Rückenlehnen mit den Merkmalen des Oberbegriffs des
Anspruchs 1.The invention relates to a height adjustment for
Backrests with the characteristics of the generic term of
Eine solche Höhenverstellung für Rückenlehnen von Stühlen, insbesondere von Bürostühlen, bestehend aus einem Gehäuse, in dem ein flacher Lehnenträger von einer Kugelrastklemmung gehalten ist, wobei der Lehnenträger mit in axialer Richtung hintereinander angeordneten Vertiefungen oder Durchbrüchen für Rastkugeln versehen ist, die mittels einer federbeaufschlagten Klemmschräge in den Vertiefungen oder Durchbrüchen gehalten werden, und wobei die Klemmschräge von einem seitlich aus dem Gehäuse geführten Taster gegen die Federkraft außer Eingriff bringbar ist, ist beispielsweise aus der EP-A-0 264 555 bekannt.Such a height adjustment for backrests from Chairs, in particular office chairs, consisting of a housing in which a flat back support from a ball detent is held, the Backrest supports with one behind the other in the axial direction arranged recesses or openings for Locking balls is provided by means of a spring-loaded clamping bevel in the recesses or breakthroughs are held, and the Clamping slope from one side of the housing guided button against the spring force out of engagement can be brought, for example, from EP-A-0 264 555 known.
Aufgabe der vorliegenden Erfindung ist es, eine Höhenverstellung der eingangs genannten Art zu schaffen, die einen hohen Bedienungskomfort, sowie eine sichere Funktion besitzt.The object of the present invention is a Height adjustment of the type mentioned at the beginning create a high ease of use, as well as a has a safe function.
Diese Aufgabe wird mit den im
Anspruch 1 genannten Merkmalen gelöst. Fortbildungen
und vorteilhafte Ausführungen der Erfindung sind in den
weiteren Ansprüchen umfaßt.This task is carried out with the
Features mentioned
Erfindungsgemäß sind in dem Gehäuse federnd gelagerte Mittel zur Verhinderung eines seitlichen Spiels des Lehnenträgers angeordnet. Durch diese Maßnahme wird ein Verkanten und Wackeln der Rückenlehne vermieden.According to the invention are resiliently mounted in the housing Means for preventing lateral play of the Backrest arranged. This measure becomes a Tilting and wobbling of the backrest avoided.
Nach einer bevorzugten Ausführung der Erfindung sind die Mittel zur Verhinderung eines seitlichen Spiels des Lehnenträgers zwei mit ihren Schrägen aneinanderliegende Keile, deren parallele Außenseiten an der Gehäusewand einerseits und an einer Seite des Lehnenträgers andererseits anliegen und wobei der an der Gehäusewand anliegende Keil an seinem breiteren Ende von einer Feder beaufschlagt ist. Der beaufschlagte Keil drückt mit seiner Schräge auf die Schräge des an dem Lehnenträger anliegenden Keils, so daß eine Kraft seitlich auf den Lehnenträger wirkt und diesen zum Anliegen am Gehäuse oder ein mit diesem verbundenen Teil bringt. Der Lehnenträger kann so spielfrei gleiten.According to a preferred embodiment of the invention, the Means for preventing lateral play of the Two backrest bearer with their bevels adjacent wedges, their parallel outer sides on the housing wall on the one hand and on one side of the Backrest bear on the other hand and the the wedge on the housing wall on its wider End is loaded by a spring. The loaded wedge presses with its slant on the Bevel of the wedge resting on the backrest support, see above that a force acts laterally on the backrest support and this to be in contact with the housing or with it connected part brings. The backrest holder can do this slide without play.
Nach einer vorteilhaften Ausführung der Erfindung ist in dem Gehäuse eine Grundplatte befestigt, in der die andere Seite des Lehnenträgers geführt ist und die die Feder für den an der Gehäusewand anliegenden Keil abstützt. Die Grundplatte weist Führungsmittel, wie zum Beispiel Nuten, für Führungsteile, zum Beispiel Zapfen, des an dem Lehnenträger anliegenden Keils auf.According to an advantageous embodiment of the invention a base plate is attached in the housing, in which the other side of the backrest support and the Spring for the wedge against the housing wall supports. The base plate has guide means such as Example grooves, for guide parts, for example pins, of the wedge resting on the backrest support.
Zur Verhinderung des unbeabsichtigten Herausziehens der Lehne aus dem Gehäuse, ist neben der Reihe von Vertiefungen oder Durchbrüchen an deren unterem Ende seitlich eine weitere Vertiefung oder ein Durchbruch angeordnet und über dieser Vertiefung oder diesem Durchbruch ist ein federnd beaufschlagtes Rastmittel für das Einrasten in die weitere Vertiefung oder den weiteren Durchbruch angeordnet. Vorzugsweise ist das Rastmittel ein Rastarm, der bei Zug des Lehnenträgers nach oben einrastet, bei Einschieben diesen jedoch wieder freigibt. Dieser Rastarm kann zum Beispiel schwenkbar in der Grundplatte gelagert sein.To prevent accidental pulling out of the Back from the case is next to the series of Indentations or breakthroughs at the lower end another depression or breakthrough on the side arranged and over this recess or this Breakthrough is a spring-loaded locking device for snapping into the further recess or further breakthrough ordered. Preferably that is Latching means a locking arm, which when the backrest support is pulled clicks upwards, but when inserted releases again. This locking arm can, for example be pivotally mounted in the base plate.
Im folgenden wird die Erfindung anhand von Zeichnungen
beispielhaft näher beschrieben. Dabei zeigen:
Die Höhenverstellung gemäß den Fig. 1 bis 6c besteht
aus einem flachen Gehäuse 1 mit in wesentlichen
rechteckigem Querschnitt, in dem ein flacher
Lehnenträger 2 gleitend geführt und festklemmbar ist.
Das Gehäuse kann unten verlängert und mit einem
Sitzträger verbunden sein. Es kann auch andere
Dimensionen haben, als dargestellt und gebogen
ausgeführt sein.The height adjustment shown in FIGS. 1 to 6c
from a
Der Lehnenträger 2 weist entlang seiner Mittelachse
eine Reihe von Bohrungen 3 auf, die die jeweilige
Einstecktiefe definieren. In einer dieser Bohrungen 3
sitzt eine Rastkugel 4, die von einer Klemmschräge 5'
eines Schiffchens 5 in die Bohrung gepreßt wird. Der
Preßdruck resultiert aus einer Feder 6, die sich in
einer Grundplatte 7 abstützt, die in dem Gehäuse 1,
beispielsweise durch Schrauben 17 oder Rastnasen,
befestigt ist. Die Grundplatte 7 weist auch eine Nut 16
auf, in der das Schiffchen 5 gleiten kann und auf der
der Feder 6 entgegengesetzten Seite einen Anschlag
findet. An dieser Seite liegt an dem Schiffchen 5 ein
Taster 8 an mit dem es gegen die Kraft der Feder 6
zurückgedrückt werden kann, worauf die Klemmschräge 5'
die Kugel 4 freigibt und die Lehne verschoben werden
kann, bis die gewünschte Einstecktiefe erreicht ist und
der Taster 8 wieder losgelassen wird. Der Taster 8
weist eine flache Ausnehmung 8' auf, in die eine kleine
Feder 9 bei der Montage einrastet, so daß der Taster 8
nicht mehr herausgezogen werden kann. Diese Maßnahme
verhindert das unbeabsichtigte Lösen des Tasters 8 und
bietet die Möglichkeit, in der gleichen
Höhenverstellung problemlos unterschiedlich gestaltete
Taster einsetzen zu können. Da die Grundplatte 7
vorzugsweise aus Kunststoff hergestellt ist, ist in den
Bereich in dem die Kugel 4 gegen die Klemmschräge 5'
drückt, eine Metallscheibe 21 eingelassen, um eine
dauerhafte Funktion zu gewährleisten.The backrest support 2 points along its central axis
a series of
Die Grundplatte 7 erstreckt sich von der Seite des
Tasters 8 aus über den großen Teil der Grundfläche des
Gehäuses 1 und weist eine Lauffläche und eine
Anschlagkante für den Lehnenträger 2 auf. Auf der
anderen Seite liegt der Lehnenträger 2 an einer Stufe
11' der geraden Seite eines Keils 11 an, der mit seiner
Schräge 11'' an der Schräge 10'' eines zweiten Keils 10
anliegt, der wiederum mit seiner geraden Seite an der
Gehäuseinnenwand anliegt. Der zweite Keil 10 ist an
seinem breiten Ende von einer Druckfeder 12
beaufschlagt, die sich in einem Vorsprung 13 der
Grundplatte abstützt. Die Feder 12 drückt den Keil 10
in der Darstellung von Fig. 1 nach oben, wodurch über
die Schrägen 10'' und 11'' eine seitliche Kraft auf den
Lehnenträger 2 geleitet wird, der so spielfrei geführt
ist. Die Grundplatte 7 weist Nuten 15 auf, die zum
ersten Keil 11 hin offen sind und Führungszapfen 14
gleitend aufnehmen (Fig. 4c und 4e). Damit ist dieser
Keil 11 geführt und kann nicht ausweichen. The
Die Höhenverstellung ist mit einer Auszugsicherung
versehen, die in den Fig. 1 und 3 versetzt dargestellt
ist. Diese Auszugsicherung weist eine Bohrung 22 auf,
die tatsächlich neben der letzten Bohrung 3 für die
Rastkugel, oder in Fig. 1 noch darunter liegen soll.
Über dieser Bohrung 22 ist in einer Ausnehmung 18 der
Grundplatte 7 ein schwenkbarer Rastarm 19 angeordnet,
der von einer in der Grundplatte 7 abgestützten Feder
20 so beaufschlagt ist, daß seine Rastnase 19' - wie in
Fig. 3 dargestellt, in die Bohrung 22 gedrückt wird,
sobald die Lehne entsprechend weit herausgezogen wird.
Die Lehne wird dann blockiert. Das Einschieben wird von
dem Rastarm 19 nicht behindert, da er in dieser
Richtung eine Ablaufschräge aufweist.The height adjustment is with a pull-out protection
provided, shown offset in Figs. 1 and 3
is. This pull-out protection has a
Claims (7)
- A height adjuster for backrests of chairs, more particularly office chairs, consisting of a housing (1) in which a flat backrest support (2) is held by a ball detent clamping mechanism (3, 4), wherein the backrest support (2) is provided with depressions or openings (3) for detent balls (4) arranged one behind another in the axial direction, which detent balls are held in the depressions or openings (3) by means of a spring-operated inclined clamping surface (5'), and wherein the inclined clamping surface (5') may be brought out of engagement against the spring force by a feeler (8) guided laterally out of the housing (1),
characterised in that means (10, 11) mounted so as to be spring-loaded are arranged in the housing (1) to prevent lateral play of the backrest support (2). - A height adjuster for backrests according to Claim 1, characterised in that the means to prevent lateral play of the backrest support (2) are two wedges (10, 11) adjoining one another with their inclined surfaces, the parallel exterior sides of which adjoin the housing wall, on the one hand, and one side of the backrest support, on the other hand, and wherein the wedge (10) adjoining the housing wall is acted upon at its wider end by a spring (12).
- A height adjuster for backrests according to Claim 2, characterised in that there is fixed in the housing (1) a base plate (7) in which the other side of the backrest support (2) is guided and which supports the spring (12) for the wedge (10) adjoining the housing wall.
- A height adjuster for backrests according to Claim 3, characterised in that the base plate (7) has guide means (15) for guide parts (14) of the wedge (11) adjoining the backrest support (2).
- A height adjuster for backrests according to Claim 1, characterised in that, beside the row of depressions or openings (3), there is arranged laterally at the lower end thereof another depression or an opening (22), and in that there are arranged over this depression or this opening spring-operated detent means (19) for engaging into the other depression or the other opening.
- A height adjuster for backrests according to Claim 5, characterised in that the detent means are a detent arm (19) which engages when the backrest support (2) is pulled upward, but releases it again when it is pushed in.
- A height adjuster for backrests according to Claim 3 and 6, characterised in that the detent arm (19) is pivotally mounted in the base plate (7).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29600332U | 1996-01-10 | ||
DE29600332U DE29600332U1 (en) | 1996-01-10 | 1996-01-10 | Height adjustment for backrests |
PCT/DE1996/002350 WO1997024958A1 (en) | 1996-01-10 | 1996-12-07 | Height-adjustment of back-rest |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0813378A1 EP0813378A1 (en) | 1997-12-29 |
EP0813378B1 true EP0813378B1 (en) | 2001-04-18 |
Family
ID=8017850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96946053A Expired - Lifetime EP0813378B1 (en) | 1996-01-10 | 1996-12-07 | Height-adjustment of back-rest |
Country Status (5)
Country | Link |
---|---|
US (1) | US5882077A (en) |
EP (1) | EP0813378B1 (en) |
DE (2) | DE29600332U1 (en) |
NO (1) | NO974049L (en) |
WO (1) | WO1997024958A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU715954B2 (en) * | 1996-10-15 | 2000-02-10 | Workspace Commercial Furniture Pty Ltd | Latch mechanism to control height adjustment of various seat components |
US6209963B1 (en) * | 1999-05-06 | 2001-04-03 | Miotto International, Inc. | Variable configuration mounting arrangement for a chair back support member |
US6609686B2 (en) * | 2002-01-18 | 2003-08-26 | Tam Srl | Adjustable support apparatus |
CN2736477Y (en) * | 2004-09-30 | 2005-10-26 | 马准安 | Tent structure |
US7264312B1 (en) * | 2006-05-17 | 2007-09-04 | Chih Chiang Wang | Backrest adjusting mechanism |
US8251078B2 (en) * | 2009-04-28 | 2012-08-28 | Oliver Joen-An Ma | Umbrella handle |
PL2759230T3 (en) * | 2013-01-23 | 2016-04-29 | L & P Property Management Co | Chair back height adjustment mechanism and chair |
US9770111B2 (en) | 2015-03-05 | 2017-09-26 | A-Dec, Inc. | Height adjusting mechanism and stool for dental practitioner |
US10368617B2 (en) | 2016-10-25 | 2019-08-06 | ZHUN-AN Ma | Umbrella assembly set up devices |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1075323A (en) * | 1912-05-24 | 1913-10-14 | Israel Benjamins | Adjustable stand. |
US1101552A (en) * | 1913-07-03 | 1914-06-30 | Walter E Hume | Support for dress-forms and the like. |
DE1753671B1 (en) * | 1965-11-12 | 1971-08-26 | Boehler Nachf Wilhelm Boehler | ARMCHAIR WITH ADJUSTABLE SEAT AND OR BACKREST |
DE3527783A1 (en) * | 1985-08-02 | 1987-02-12 | Froescher August Gmbh Co Kg | ADJUSTING DEVICE FOR THE STEP-BY-STEP LOCKING HEIGHT ADJUSTMENT OF BACKRESTS ON WORK CHAIRS |
DE8627648U1 (en) * | 1986-10-16 | 1988-09-01 | Dauphin F W Buerositzmoebel | |
DE9310220U1 (en) * | 1993-07-09 | 1994-08-04 | Froli Kunststoffe Heinrich Fro | Sliding guide |
-
1996
- 1996-01-10 DE DE29600332U patent/DE29600332U1/en not_active Expired - Lifetime
- 1996-12-07 DE DE59606803T patent/DE59606803D1/en not_active Expired - Fee Related
- 1996-12-07 US US08/913,114 patent/US5882077A/en not_active Expired - Fee Related
- 1996-12-07 EP EP96946053A patent/EP0813378B1/en not_active Expired - Lifetime
- 1996-12-07 WO PCT/DE1996/002350 patent/WO1997024958A1/en active IP Right Grant
-
1997
- 1997-09-03 NO NO974049A patent/NO974049L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
US5882077A (en) | 1999-03-16 |
WO1997024958A1 (en) | 1997-07-17 |
EP0813378A1 (en) | 1997-12-29 |
NO974049D0 (en) | 1997-09-03 |
DE59606803D1 (en) | 2001-05-23 |
NO974049L (en) | 1997-09-03 |
DE29600332U1 (en) | 1996-03-07 |
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