EP1413227B1 - Seat depth adjustment device for a chair - Google Patents

Seat depth adjustment device for a chair Download PDF

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Publication number
EP1413227B1
EP1413227B1 EP03016953A EP03016953A EP1413227B1 EP 1413227 B1 EP1413227 B1 EP 1413227B1 EP 03016953 A EP03016953 A EP 03016953A EP 03016953 A EP03016953 A EP 03016953A EP 1413227 B1 EP1413227 B1 EP 1413227B1
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EP
European Patent Office
Prior art keywords
spindle
tube
seat
cushion
seat carrier
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 - Fee Related
Application number
EP03016953A
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German (de)
French (fr)
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EP1413227A1 (en
Inventor
Werner Link
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.)
Interstuhl Bueromoebel GmbH and Co KG
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Interstuhl Bueromoebel GmbH and Co KG
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Publication of EP1413227A1 publication Critical patent/EP1413227A1/en
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Publication of EP1413227B1 publication Critical patent/EP1413227B1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts

Definitions

  • the invention relates to a device for adjusting the seat depth of a chair with a seat support having the features of the preamble of claim 1.
  • a seat depth adjustment device for a motor vehicle seat which has seat-fixed guide areas which extend in the seat longitudinal direction and parallel to one another.
  • a Weg brieflyenver scholaril is guided longitudinally displaceable and adjustable by means of a threaded spindle and spindle nut having gear in the seat longitudinal direction.
  • the threaded spindle is mounted transversely to the seat longitudinal direction on the vehicle seat.
  • An articulated lever is articulated on the one hand to the spindle nut and on the other hand with its other end to the Wegtiefenverexcellentil, wherein the projection of the articulated lever on the Wegtiefenverexcellentil in each angular position with the threaded spindle forms an angle.
  • the seat depth adjustment should be structurally simple and ensure that the upholstery folds up and down with an adjustment of the seat depth in the case of a padded seat support.
  • the present invention proposes a device for adjusting the seat depth of a chair with the features of claim 1.
  • the nuts move either outwards or inwards.
  • the struts articulated on the nuts either extend in the longitudinal direction of the seat or become more angled relative to the latter.
  • the adjustment is more or less extended from the seat support and thus the seat depth is correspondingly larger or smaller.
  • the pivot points of the struts on the seat support may preferably be arranged in the region of the vertical center plane in the seat direction of the seat support.
  • the spindle may have two opposing threaded portions for making the counter-rotating movement of the nut, which may, for example, meet in the center of the spindle.
  • the adjustment can be arranged by two guide tubes, which are fixedly connected to the adjustment and slidably mounted on the seat support, extendable on the seat body. This allows a very low-friction change in the position of the adjustment.
  • the rotation of the spindle can be done by means of at least one hand wheel, but preferably two hand wheels, so that the adjustment can be made with both the left and the right hand.
  • a cushion receiving tube Coaxially to the spindle, a cushion receiving tube is arranged, on which the pad leading edge of a pad is attached and which has a at least over a longitudinal portion extending guide slot through which the nuts are passed through to the outside.
  • the pad receiving tube is set in a slight rotation during a rotation of the spindle by the migration of the nuts along the guide slot.
  • the course of the guide slot and the thread pitch of the spindle can be adjusted to one another in such a way that, when the seat depth changes, the pad rolls up onto the upholstery receiving tube without wrinkles and unwinds from it.
  • the guide slot of the upholstery tube can be tailored in shape and length individually to a variety of seat support.
  • One possibility, for example, is to form the guide slot V-shaped, wherein the tip of the V is arranged at least approximately in the center of the tube. In this way, a linear displacement can be obtained when the spindle is rotated.
  • the pad can be attached by means of a welt on the upholstery tube.
  • the adjustment part may have a carrier element and a lid, which together form a receptacle for the upholstery receiving tube and the spindle arranged therein.
  • the tube and the spindle then roll off in this receptacle.
  • the upholstery receiving tube may be supported by lateral guide bushes on the spindle.
  • the sole FIGURE shows an exploded view of a seat support 10 with a seat depth adjustment device 11.
  • the seat depth adjustment device 11 is arranged on the front edge 10.1 of the seat support 10.
  • the seat support 10 is provided on the top with a pad, not shown here.
  • the seat depth adjustment 11 has a support part 12 which is mounted extendable on two guide tubes 13 on the seat support 10. At the top, the support part 12 is covered by a cover 14, which together with the support part 12 in the front region forms a receptacle closed by more than 180 ° for a cushion guide tube 15 and a spindle 16 arranged within the cushion guide tube 15.
  • the spindle 16 can be rotated by means of hand wheels 17 in rotation. It is provided with two opposing threaded portions 16.1 and 16.2, on each of which a nut 18 is arranged.
  • the nuts 18 have articulation points 18.1 for two struts 19, which are articulated with their other end on the seat support 10.
  • the pivot points of the struts 19 on the seat support 10 lie close to the vertical center plane 20 of the seat support 10.
  • the support member 12 is moved by a movement of the nuts 18 by rotation of the spindle 16 by means of a handwheel 17 further on the guide tubes 13 to the outside, thereby the seat depth is extended.
  • the struts 19 then stretch.
  • they are in an apart moving the nuts 18 in rotation of the spindle 16 in the opposite direction stronger angled, causing the support member 12 and with him the screwed tightly with him cover 14 continue on the guide tubes 13 inwardly towards seat support 10.
  • the upholstery receiving tube 15 is mounted on the spindle 16 by means of lateral guide bushes 21. At the upholstery receiving tube 15, the leading edge of the pad, not shown here attached for example by means of a welt.
  • the cushion receiving tube 15 also has a guide slot 22 which extends over part of the length of the guide tube 15 and has a V-shaped portion. Through this guide slot 22 protrude the articulation points 18.1 of the nuts 18 therethrough.

Description

Die Erfindung betrifft eine Vorrichtung zur Verstellung der Sitztiefe eines Stuhls mit einem Sitzträger mit den Merkmalen des Oberbegriffs von Anspruch 1.The invention relates to a device for adjusting the seat depth of a chair with a seat support having the features of the preamble of claim 1.

Aus der DE 199 15 327 C1 ist eine Sitztiefenverstellvorrichtung für einen Kraftfahrzeugsitz bekannt geworden, der sitzfeste Führungsbereiche aufweist, die sich in Sitzlängsrichtung und parallel zueinander erstrecken. Ein Sitztiefenverstellteil ist längsverschieblich geführt und mittels eines eine Gewindespindel und Spindelmutter aufweisenden Getriebes in Sitzlängsrichtung verstellbar. Die Gewindespindel ist quer zur Sitzlängsrichtung am Kraftfahrzeugsitz gelagert. Ein Gelenkhebel ist einerseits an der Spindelmutter und andererseits mit seinem anderen Ende an dem Sitztiefenverstellteil angelenkt, wobei die Projektion des Gelenkhebels auf das Sitztiefenverstellteil in jeder Winkelstellung mit der Gewindespindel einen Winkel einschließt.From DE 199 15 327 C1, a seat depth adjustment device for a motor vehicle seat has become known which has seat-fixed guide areas which extend in the seat longitudinal direction and parallel to one another. A Sitztiefenverstellteil is guided longitudinally displaceable and adjustable by means of a threaded spindle and spindle nut having gear in the seat longitudinal direction. The threaded spindle is mounted transversely to the seat longitudinal direction on the vehicle seat. An articulated lever is articulated on the one hand to the spindle nut and on the other hand with its other end to the Sitztiefenverstellteil, wherein the projection of the articulated lever on the Sitztiefenverstellteil in each angular position with the threaded spindle forms an angle.

Sitztiefenverstellungen gehören heute zu jedem hochwertigen Bürostuhl, um diesen Stuhl an Personen unterschiedlicher Körpergröße optimal anpassen zu können. Die Sitztiefenverstellung sollte dabei konstruktiv einfach sein und bei einem gepolsterten Sitzträger dafür sorgen, dass sich das Polster bei einer Verstellung der Sitztiefe faltenfrei auf- und abrollt.Seat depth adjustments are now part of every high-quality office chair in order to be able to optimally adapt this chair to people of different body size. The seat depth adjustment should be structurally simple and ensure that the upholstery folds up and down with an adjustment of the seat depth in the case of a padded seat support.

Zur Erfüllung dieser Anforderungen schlägt die vorliegende Erfindung eine Vorrichtung zur Verstellung der Sitztiefe eines Stuhls mit den Merkmalen des Anspruchs 1 vor. Bei einem Drehen der Spindel bewegen sich die Muttern entweder nach außen oder nach innen. Dies führt dazu, dass die an den Muttern angelenkten Streben sich entweder in Sitzlängsrichtung strecken oder gegenüber dieser stärker abgewinkelt werden. Je nach Stellung der Streben ist das Verstellteil mehr oder weniger weit aus dem Sitzträger ausgezogen und somit auch die Sitztiefe entsprechend größer oder kleiner. Dabei können die Anlenkpunkte der Streben am Sitzträger vorzugsweise im Bereich der senkrechten Mittelebene in Sitzrichtung des Sitzträgers angeordnet sein. Bei einem Aufeinanderzubewegen der Muttern durch Drehen der Spindel wird dann die Sitztiefe vergrößert, während ein Drehen der Spindel in Gegenrichtung, sodass die Muttern auseinanderbewegt werden, zu einer Verkürzung der Sitztiefe führt. Die Spindel kann zur Herstellung der gegenläufigen Bewegung der Mutter zwei gegenläufige Gewindeabschnitte aufweisen, die sich beispielsweise in der Mitte der Spindel treffen können.To meet these requirements, the present invention proposes a device for adjusting the seat depth of a chair with the features of claim 1. When turning the spindle, the nuts move either outwards or inwards. As a result, the struts articulated on the nuts either extend in the longitudinal direction of the seat or become more angled relative to the latter. Depending on the position of the struts, the adjustment is more or less extended from the seat support and thus the seat depth is correspondingly larger or smaller. The pivot points of the struts on the seat support may preferably be arranged in the region of the vertical center plane in the seat direction of the seat support. By moving the nuts toward one another by turning the spindle, the depth of the seat is then increased, while turning the spindle in the opposite direction, so that the nuts are moved apart, leads to a shortening of the seat depth. The spindle may have two opposing threaded portions for making the counter-rotating movement of the nut, which may, for example, meet in the center of the spindle.

Die konstruktive Lösung der Ausziehbarkeit des Verstellteils ist auf verschiedene Weise möglich. Bei einer bevorzugten Ausgestaltung kann das Verstellteil durch zwei Führungsrohre, die mit dem Verstellteil fest verbunden und verschiebbar am Sitzträger gelagert sind, ausziehbar am Sitzkörper angeordnet sein. Dies erlaubt eine sehr reibungsarme Veränderung der Position des Verstellteils.The constructive solution of the extensibility of the adjustment is possible in various ways. In a preferred embodiment, the adjustment can be arranged by two guide tubes, which are fixedly connected to the adjustment and slidably mounted on the seat support, extendable on the seat body. This allows a very low-friction change in the position of the adjustment.

Die Rotation der Spindel kann mittels mindestens eines Handrades, vorzugsweise aber zweier Handräder erfolgen, sodass die Verstellung sowohl mit der linken als auch mit der rechten Hand vorgenommen werden kann.The rotation of the spindle can be done by means of at least one hand wheel, but preferably two hand wheels, so that the adjustment can be made with both the left and the right hand.

Koaxial zur Spindel ist ein Polsteraufnahmerohr angeordnet, an dem die Polstervorderkante eines Polsters befestigt ist und das einen sich mindestens über einen Längenabschnitt erstreckenden Führungsschlitz aufweist, durch den die Muttern hindurch nach außen geführt sind. Durch eine entsprechende Form des Führungsschlitzes, bei- spielsweise der Form zweier gegenläufiger Gewinde mit großer Steigung, wird bei einer Rotation der Spindel durch das Wandern der Muttern entlang des Führungsschlitzes auch das Polsteraufnahmerohr in eine leichte Rotation versetzt. Durch diese Rotation des Polsteraufnahmerohrs lässt sich das Polster bei Verkürzung der Sitztiefe aufrollen und bei einer Vergrößerung der Sitztiefe wieder abrollen. Der Verlauf des Führungsschlitzes und die Gewindesteigung der Spindel können dabei derart aufeinander abgestimmt sein, dass sich bei einer Veränderung der Sitztiefe das Polster jeweils faltenfrei auf das Polsteraufnahmerohr aufrollt und von diesem abrollt. Der Führungsschlitz des Polsteraufnahmerohrs kann in Form und Länge individuell auf die verschiedensten Sitzträger abgestimmt werden. Eine Möglichkeit besteht beispielsweise darin, den Führungsschlitz V-förmig auszubilden, wobei die Spitze des V mindestens annähernd in der Rohrmitte angeordnet ist. Auf diese Weise kann eine lineare Verstellung erhalten werden, wenn die Spindel gedreht wird.Coaxially to the spindle, a cushion receiving tube is arranged, on which the pad leading edge of a pad is attached and which has a at least over a longitudinal portion extending guide slot through which the nuts are passed through to the outside. By a corresponding shape of the guide slot, at- For example, the shape of two opposing threads with large pitch, the pad receiving tube is set in a slight rotation during a rotation of the spindle by the migration of the nuts along the guide slot. As a result of this rotation of the upholstery receiving tube, the upholstery can be rolled up as the seat depth is shortened and unrolled again as the seat depth increases. The course of the guide slot and the thread pitch of the spindle can be adjusted to one another in such a way that, when the seat depth changes, the pad rolls up onto the upholstery receiving tube without wrinkles and unwinds from it. The guide slot of the upholstery tube can be tailored in shape and length individually to a variety of seat support. One possibility, for example, is to form the guide slot V-shaped, wherein the tip of the V is arranged at least approximately in the center of the tube. In this way, a linear displacement can be obtained when the spindle is rotated.

Das Polster kann mittels eines Keders am Polsteraufnahmerohr befestigt sein.The pad can be attached by means of a welt on the upholstery tube.

Das Verstellteil kann ein Trägerelement und einen Deckel aufweisen, die zusammen eine Aufnahme für das Polsteraufnahmerohr und die darin angeordnete Spindel bilden. Das Rohr und die Spindel rollen dann in dieser Aufnahme ab. Dabei kann das Polsteraufnahmerohr durch seitliche Führungsbuchsen auf der Spindel gelagert sein.The adjustment part may have a carrier element and a lid, which together form a receptacle for the upholstery receiving tube and the spindle arranged therein. The tube and the spindle then roll off in this receptacle. In this case, the upholstery receiving tube may be supported by lateral guide bushes on the spindle.

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel einer erfindungsgemäßen Sitztiefenverstellung anhand der Zeichnung näher beschrieben.Hereinafter, a preferred embodiment of a seat depth adjustment according to the invention will be described with reference to the drawings.

Die einzige Figur zeigt eine Explosionsdarstellung eines Sitzträgers 10 mit einer Sitztiefenverstelleinrichtung 11. Die Sitztiefenverstelleinrichtung 11 ist dabei an der Vorderkante 10.1 des Sitzträgers 10 angeordnet. Der Sitzträger 10 wird auf der Oberseite mit einem hier nicht dargestellten Polster versehen.The sole FIGURE shows an exploded view of a seat support 10 with a seat depth adjustment device 11. The seat depth adjustment device 11 is arranged on the front edge 10.1 of the seat support 10. The seat support 10 is provided on the top with a pad, not shown here.

Die Sitztiefenverstellung 11 weist ein Trägerteil 12 auf, das ausziehbar an zwei Führungsrohren 13 am Sitzträger 10 gelagert ist. Nach oben ist das Trägerteil 12 von einem Deckel 14 abgedeckt, der zusammen mit dem Trägerteil 12 im vorderen Bereich eine um mehr als 180° geschlossene Aufnahme für ein Polsterführungsrohr 15 und eine innerhalb des Polsterführungsrohrs 15 angeordnete Spindel 16 bildet. Die Spindel 16 kann mittels Handrädern 17 in Rotation versetzt werden. Sie ist mit zwei gegenläufigen Gewindeabschnitten 16.1 und 16.2 versehen, auf denen jeweils eine Mutter 18 angeordnet ist. Die Muttern 18 weisen Anlenkstellen 18.1 für zwei Streben 19 auf, die mit ihrem anderen Ende am Sitzträger 10 gelenkig gelagert sind. Die Anlenkpunkte der Streben 19 am Sitzträger 10 liegen dabei dicht neben der senkrechten Mittelebene 20 des Sitzträgers 10. Dadurch wird das Trägerteil 12 bei einem Aufeinanderzubewegen der Muttern 18 durch Rotation der Spindel 16 mittels eines Handrads 17 weiter auf den Führungsrohren 13 nach außen gefahren, wodurch sich die Sitztiefe verlängert. Die Streben 19 strecken sich dann nämlich. Im Gegensatz dazu werden sie bei einem Auseinanderbewegen der Muttern 18 bei Rotation der Spindel 16 in Gegenrichtung stärker abgewinkelt, wodurch das Trägerteil 12 und mit ihm der fest mit ihm verschraubte Deckel 14 weiter auf den Führungsrohren 13 einwärts in Richtung Sitzträger 10 gefahren werden.The seat depth adjustment 11 has a support part 12 which is mounted extendable on two guide tubes 13 on the seat support 10. At the top, the support part 12 is covered by a cover 14, which together with the support part 12 in the front region forms a receptacle closed by more than 180 ° for a cushion guide tube 15 and a spindle 16 arranged within the cushion guide tube 15. The spindle 16 can be rotated by means of hand wheels 17 in rotation. It is provided with two opposing threaded portions 16.1 and 16.2, on each of which a nut 18 is arranged. The nuts 18 have articulation points 18.1 for two struts 19, which are articulated with their other end on the seat support 10. The pivot points of the struts 19 on the seat support 10 lie close to the vertical center plane 20 of the seat support 10. As a result, the support member 12 is moved by a movement of the nuts 18 by rotation of the spindle 16 by means of a handwheel 17 further on the guide tubes 13 to the outside, thereby the seat depth is extended. The struts 19 then stretch. In contrast, they are in an apart moving the nuts 18 in rotation of the spindle 16 in the opposite direction stronger angled, causing the support member 12 and with him the screwed tightly with him cover 14 continue on the guide tubes 13 inwardly towards seat support 10.

Das Polsteraufnahmerohr 15 ist mittels seitlichen Führungsbuchsen 21 auf der Spindel 16 gelagert. Am Polsteraufnahmerohr 15 wird die Vorderkante des hier nicht dargestellten Polsters beispielsweise mittels eines Keders befestigt. Das Polsteraufnahmerohr 15 besitzt außerdem einen Führungsschlitz 22, der sich über einen Teil der Länge des Führungsrohrs 15 erstreckt und einen V-förmigen Bereich aufweist. Durch diesen Führungsschlitz 22 ragen die Anlenkstellen 18.1 der Muttern 18 hindurch. Durch die Form des Führungsschlitzes 22 und eine entsprechende Wahl der Steigung der Gewindeabschnitte 16.1 der Spindel 16 kann sichergestellt werden, dass die Rotationsbewegung der Spindel 16 in eine Linearbewegung des Trägerteils 12 und des Deckels 14 umgesetzt wird. Gleichzeitig wird gewährleistet, dass das Polster beim Abrollen und Aufrollen auf das Polsteraufnahmerohr 15 faltenfrei bleibt.The upholstery receiving tube 15 is mounted on the spindle 16 by means of lateral guide bushes 21. At the upholstery receiving tube 15, the leading edge of the pad, not shown here attached for example by means of a welt. The cushion receiving tube 15 also has a guide slot 22 which extends over part of the length of the guide tube 15 and has a V-shaped portion. Through this guide slot 22 protrude the articulation points 18.1 of the nuts 18 therethrough. By the shape of the guide slot 22 and a corresponding choice of the pitch of the threaded portions 16.1 of the spindle 16 can be ensured that the rotational movement of the spindle 16 is converted into a linear movement of the support member 12 and the cover 14. At the same time it is ensured that the pad remains wrinkle-free when unrolling and rolling up on the upholstery receiving tube 15.

Claims (10)

  1. Seat depth adjustment device for a chair, with a seat carrier (10) and an adjusting part (11), in which a spindle (16) is rotatably mounted, extensibly arranged at the front edge (10.1) of the seat carrier (10), two nuts (18) arranged on the spindle (16) moving in opposite directions on the spindle (16) upon rotation of the spindle (16), with a strut (19) hinged to each nut, characterized in that the struts (19) are pivotably attached to the seat carrier (10) and the seat carrier (10) is cushioned and a cushion take-up tube (15) to which the front edge of the cushion is fastened is arranged coaxially with the spindle (16) and has a guide slot (22), extending over at least a portion of its length, through which the nuts (18) are led outwards so that upon rotation of the spindle (16) the cushion take-up tube (15) is also set in rotation, the profile of the guide slot (22) and the thread lead of the spindle (16) being matched to each other so that upon alteration of the seat depth the cushion winds on and off the cushion take-up tube (15) without wrinkling.
  2. Device according to Claim 1, characterized in that the points of attachment of the struts (19) to the seat carrier (10) are arranged in the region of the vertical midplane (20) in the seating direction of the seat carrier (10).
  3. Device according to Claim 1 or Claim 2, characterized in that the spindle (16) has two portions (16.1) with opposite-handed threads.
  4. Device according to any one of Claims 1 to 3, characterized in that the adjusting part (11) is extensibly arranged on the seat carrier (10) by two guide tubes (13) which are fixedly connected to the adjusting part (11) and displaceably mounted on the seat carrier (10).
  5. Device according to any one of Claims 1 to 4, characterized in that the spindle (16) is rotatable by means of at least one handwheel (17).
  6. Device according to any one of Claims 1 to 5, characterized in that the guide slot (20) is in the form of two opposite-handed screw threads with a large lead.
  7. Device according to any one of Claims 1 to 6, characterized in that the guide slot (20) has a V-shaped profile with the point of the V located at least approximately at the centre of the tube.
  8. Device according to any one of Claims 1 to 7, characterized in that the cushion is fastened to the cushion take-up tube (15) by means of a welt.
  9. Device according to any one of Claims 1 to 8, characterized in that the adjusting part (11) has a carrier element (12) and a cover (14) which together form a holder for the cushion take-up tube (15) and the spindle (16) arranged therein.
  10. Device according to any one of Claims 1 to 9, characterized in that the cushion take-up tube (15) is mounted on the spindle (16) by lateral guide bushes (21).
EP03016953A 2002-10-22 2003-07-25 Seat depth adjustment device for a chair Expired - Fee Related EP1413227B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10249335A DE10249335A1 (en) 2002-10-22 2002-10-22 Device for adjusting the seat depth of a chair
DE10249335 2002-10-22

Publications (2)

Publication Number Publication Date
EP1413227A1 EP1413227A1 (en) 2004-04-28
EP1413227B1 true EP1413227B1 (en) 2006-03-29

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US (1) US6926361B2 (en)
EP (1) EP1413227B1 (en)
DE (2) DE10249335A1 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US8991921B2 (en) 2012-07-20 2015-03-31 Steelcase Inc. Seating unit with seat position and depth adjustment assembly

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DE50302786D1 (en) 2006-05-18
DE10249335A1 (en) 2004-05-06
EP1413227A1 (en) 2004-04-28
US6926361B2 (en) 2005-08-09
US20040104612A1 (en) 2004-06-03

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