EP0265782A2 - Sitting furniture - Google Patents

Sitting furniture Download PDF

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Publication number
EP0265782A2
EP0265782A2 EP87115073A EP87115073A EP0265782A2 EP 0265782 A2 EP0265782 A2 EP 0265782A2 EP 87115073 A EP87115073 A EP 87115073A EP 87115073 A EP87115073 A EP 87115073A EP 0265782 A2 EP0265782 A2 EP 0265782A2
Authority
EP
European Patent Office
Prior art keywords
seat part
support
seating furniture
lumbar support
pelvic
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
EP87115073A
Other languages
German (de)
French (fr)
Other versions
EP0265782A3 (en
EP0265782B1 (en
Inventor
Rolf Völkle
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87115073T priority Critical patent/ATE52671T1/en
Publication of EP0265782A2 publication Critical patent/EP0265782A2/en
Publication of EP0265782A3 publication Critical patent/EP0265782A3/en
Application granted granted Critical
Publication of EP0265782B1 publication Critical patent/EP0265782B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • 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
    • A47C1/0325—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 clamps or friction locking members
    • 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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type
    • 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
    • A47C7/02—Seat parts
    • A47C7/024—Seat parts with double seats
    • 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
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs

Definitions

  • the invention relates to seating furniture in accordance with the preamble of patent claim 1.
  • the adjusting device forces a simultaneous synchronous adjustment of both the front seat part and the backrest, as well as the pelvic lumbar support, the output section of which, when the seating furniture is transferred from the working position to the rest position extends at least over the entire lumbar region of the spine of the chair user. If the known seating furniture is in the working position, the seating surface runs approximately horizontally.
  • the adjusting device comprises a control lever which is curved over approximately 90 ° and which is articulated on the seat part carrier and articulates on the backrest.
  • the adjusting lever can be swiveled using a pneumatic cylinder.
  • the pelvic lumbar support is supported on the adjusting lever by an approximately vertically arranged spring.
  • the rocker arm can be fixed in a set position by means of a friction-locking lamella package through which a clamping bolt passes and a forced and synchronous inclination adjustment of the seat part and backrest is provided in a ratio of approximately 1: 2 (exemplary embodiment of FIGS. 6, 6a) .
  • the invention has for its object to develop a seating of the type mentioned in such a way that his, the armchair shell contour in stable support and flexible elastic zones Changing shell elements when changing the seating position of the armchair user automatically and continuously and much better to adapt to the movement sequences taking place, i.e. the active body motor and supporting the body of the armchair user in the pelvic lumbar area throughout.
  • the weight-based, adjustable spring base of the swing arm of the armchair which is used to hold the seat shell, in conjunction with a harmoniously graduated upholstery of the various support areas of its seat shell, ensures pleasant contact with the seat and back thanks to the large area of the body load.
  • the synchronous adjustment of the seat, rear transition zone and backrest profile results in a fatigue-free balance of the upper body with optimal mobility and prevents the pelvis from tilting excessively in every sitting position.
  • the schematic representation according to FIG. 1 illustrates the possible transfer of the seating furniture from a position which is optimal for the posture of the working user (working position according to solid lines) to an extreme rear resting position (dashed lines), but also the basic structure of the seating furniture :
  • the pedestal 10 comprises a height-adjustable support spindle 10a.
  • a seat part carrier 11, which is shown in FIGS. 6-8, is rotatably received by the latter.
  • the seat part carrier is plugged onto the upper end of the support spindle 10 in the region of its receiving part 11a provided with a receiving bore.
  • the seat part carrier 11 extends widening forward, where it ends in a linear and transverse to the plane of symmetry bb section 11b (Fig.4).
  • Bearing eyes 11c for the coaxial axle bolts 12 of the rocker arm 14 and further bearing eyes 11c ⁇ for the coaxial axle bolts 32 of the synchronizing lever 25 are molded onto this bearing section 11b, as shown in particular in FIGS. 6-8 in connection with Fig. 4 can be seen.
  • the vertical parallel projection of the seat part carrier corresponds approximately to an isosceles triangle, as can be seen in particular in FIG. 7.
  • the front seat part S is formed from the rocker arm 14, the associated seat shell 18a and the upholstery 18b and via the rocker arm 14 with the aid of the axle bolts 12 in one the front edge of the seat part S adjacent region articulated on the seat part carrier 11.
  • a pelvic lumbar support B ending in the lumbar region of the chair user is connected via a horizontal pivot axis 17 ⁇ .
  • the body motor pivoting of the seat part S and pelvic lumbar support part B is synchronized with the aid of synchronizing levers 25 such that pivoting the seat part S forces the pelvic lumbar support to be pivoted by a pivoting angle which is 2.5 times greater than the pivoting angle of the seat part S.
  • the backrest R is connected directly to the upper edge of the pelvic lumbar support B and is connected to it via a pivot axis 36. A swiveling out of the backrest R caused by body movement takes place counter to the action of a spring force.
  • This is preferably formed by leg springs 42 (in FIG. 2) which are received by the axle bolts forming the pivot axis 36 and whose legs rest on the lumbar lumbar support B on the one hand and on the backrest R on the other hand.
  • the input section b of the lumbar lumbar support B adjoining the seat part S extends approximately perpendicularly to its output section b ⁇ adjoining the backrest R.
  • This output section b ⁇ is approximately half as long as the input section.
  • the inlet section and outlet section merge into one another via an arcuate section k (FIG. 2).
  • the synchronizing lever 25 engages over the coaxial Axle pin 32 on the seat part support 11.
  • the axle bolts 32 are located approximately in a vertical plane aa (FIG. 3) giving the rocker arm 14 through the pivot axis 32 ⁇ (FIG. 1).
  • the synchronizing lever 25 is articulated on the pelvic lumbar support part B via a transverse axis 30.
  • the transverse axis 30 is offset from the pivot axis 17 'formed by the axle bolts 17' of the pelvic lumbar support B in such a way back and down that there is a pivoting ratio between the rocker 14 and the pelvic lumbar support B of about 1/5.
  • two friction-locking plate packs 24, 33 are provided, which lie symmetrically to the plane of symmetry bb (FIG. 4) and are penetrated by a clamping bolt 22 which can be controlled manually by means of an eccentric.
  • the pelvic lumbar support B arresting frictional lamella pack 24 is rigidly connected to the pelvic lumbar support B via a transverse axis 30 and a transverse bolt 31 parallel to this transverse axis 30 and extends forwardly under the seat part S.
  • the frictional plate pack 24 has its arcuate longitudinal slot penetrated by the clamping bolt 22.
  • the friction plate pack 33 for locking the rocker 14 is pivotally mounted on a stationary bearing axis 23 of the seat part carrier 11, extends approximately in the vertical direction. The length of its slot limits the potential pivot angle of the rocker 14 and thus the seat part S.
  • a coil spring 13d for springing the rocker 14 is arranged symmetrically to the plane of symmetry aa (FIG. 4) between the support spindle 10a and the front edge of the seat part S and is thereby caught between a support bearing of the rocker 14 and a lower bearing plate 13e.
  • the coil spring 13d is provided with a device 13 for changing its pretension.
  • This device comprises a screw bolt 13b which is provided with a handwheel 13a and which engages with the internal thread of a screw nut 13c fixed in the seat part carrier 11 located, as can be seen in particular from FIG. 2.
  • the bearing plate 13e sits on the screw bolt 13b and can thus transmit the axial movement component of the rotating screw bolt 13b to the coil spring 13d.
  • Two further helical springs arranged on both sides of the plane of symmetry aa are provided for the suspension of the rocker 14. Their arrangement in the space between the bore 10a ⁇ and support spindle 10a and the helical spring 13d results from FIG. 7, where the abutments 11f are indicated for these further helical springs. The position of the helical spring 13d also results from FIG.
  • the axle bolts 17 (FIGS. 2, 3) forming the pivot axis 17 ⁇ (FIG. 1) pass through bearing eyes 14b of the rocker arm 14, which is mounted on the axle bolts 12 via the bearing eyes 14a.
  • the rocker 14, as can be seen in particular from FIG. 10, has two legs 14c which extend between the bearing eyes 14a and 14b and are connected to one another via a bridge 14f. With 14d formations are designated, which form a bearing for the clamping device for locking the inclination of the seat part S and pelvic lumbar support B.
  • the pivot axis 36 of the backrest R is about 14 cm above the pivot axis 17 ⁇ of the pelvic lumbar support B when the armchair is in the working position. When the armchair is extremely at rest, the support surface of the input section of the pelvic lumbar support B and the support surface of the seat part S lie in a common, slightly backward inclined plane cc (Fig. 3).
  • the seating furniture is moved from a working position (Fig. 2, 15) to a rest position (Fig. 3.16) ) transferred.
  • the rest position the seated person can stretch or bend his back back against the force of the spring 42. This results in a considerable shift of the body's center of gravity backwards, so that there is a risk of the seating furniture tipping over backwards. This danger can be countered, for example, by a corresponding restriction of the backrest R being able to be swung out backwards.
  • a device can be provided to reliably avoid the risk of the seating unit tipping over, which causes the center of gravity to be shifted forward when the seated person leans backwards with the backrest swung out to the maximum.
  • 15 and 16 shows how this device is constructed and works:
  • the axle bolts 12 of the rocker arm 14 are horizontally displaceably mounted in horizontal elongated holes 50 of the stationary seat part carrier 11.
  • the maximum displacement X corresponds to the length of the elongated holes 50.
  • the shell contour formed from the front seat part S, pelvic lumbar support B and backrest R is the body-supporting shell contour during the transition of the seating furniture from the working position ( Fig. 15) in the rest position (Fig. 16) by the distance X to the rear.
  • the displacement is effected with the aid of a lever system H which is articulated to the rocker 14 for the seat part S, the support plate 15 for the lumbar lumbar support B and the stationary seat part carrier 11.
  • This comprises two levers 51 which are articulated on one end to the stationary seat part support 11 by means of axle bolts 52 and at the other end on the rocker 14 by means of axle bolts 53.
  • lever 51 With upper extension ends 51 ⁇ of the lever 51 are 56 two axle bolts further levers 54 are articulated, which are articulated on the back by means of axle bolts 55 for support plate 15 for the pelvic lumbar support B.
  • the horizontal displacement of the body-supporting shell contour formed by the distance X backwards from the front seat part S with rocker 14, the pelvic lumbar support B with the support plate 15 and the backrest R is caused by the pivoting of the pelvic lumbar support B backwards.
  • the levers 54 are essentially forward to a position according to FIG. 16 due to a forced guidance of the axle bolts 55 about the axis 17 ⁇ in a circular arc K ⁇ from a position according to FIG. 15 postponed.
  • the levers 51 are pivoted from their position according to FIG. 15 into the position according to FIG. 16 about the stationary axle bolts 52. Since these levers 51 are articulated in their upper half via the axle bolts 53 to the rocker 14, the movement unit referred to above as the shell contour is shifted forward by the distance X by its pivoting.
  • the risk of the seating furniture tipping over on the back is reliably avoided, even if the seated person leans backwards in the rest position with the backrest swung out to the maximum.

Landscapes

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

Abstract

Das Sitzmöbel weist eine unterfederte Schwinge (14) auf, die an der Vorderkante des Sitzteils (S) am Sitzteilträgr (11) angelenkt ist. Mit der Schwinge (14) ist rückseitig eine Becken-Lendenstütze (B) über eine horizontale Schwenkachse (17) verbunden. Der Eingangsabschnitt (b) der Becken-Lendenstütze (B) ist länger als ihr Ausgangsabschnitt (b'). Die Synchronhebel (25) verbinden Sitzteilträger (11) und Becken-Lendenstütze (B) derart, daß eine Verschwenkung des Sitzteiles (S) eine überproportionale Verschwenkung der Becken-Lendenstütze (B) erzwingt. Die Rückenlehne (R) ist durch Körperbewegung gegen die Kraft einer Feder (42) nach rückwarts ausschwenkbar. Dadurch wird erreicht, daß sich die Schalenelemente der Schalenkontur des Sessels bzw. Stuhls bei Änderung der Sitzhaltung des Sesselsbenutzers wesentlich besser den sich dabei vollziehenden Bewegungsabläufen anpassen und den Körper des Sesselbenutzers im Becken-Lendenbereich durchgehend abstützen (Fig. 2).The seating furniture has a spring-loaded swing arm (14) which is articulated on the front edge of the seat part (S) on the seat part support (11). A pelvic lumbar support (B) is connected to the rocker (14) via a horizontal swivel axis (17). The entrance section (b) of the pelvic lumbar support (B) is longer than its exit section (b '). The synchronous lever (25) connect the seat part support (11) and pelvic lumbar support (B) in such a way that pivoting the seat part (S) forces a disproportionate pivoting of the pelvic lumbar support (B). The backrest (R) can be pivoted backwards by body movement against the force of a spring (42). It is thereby achieved that the shell elements of the shell contour of the armchair or chair when changing the seating posture of the armchair user adapt much better to the movement sequences taking place and support the body of the armchair user in the pelvic lumbar region continuously (FIG. 2).

Description

Die Erfindung bezieht sich auf ein Sitzmöbel entsprechend dem Oberbegriff des Patentanspruches 1.The invention relates to seating furniture in accordance with the preamble of patent claim 1.

Bei einem bekannten Sitzmöbel dieser Art (EP-PS 01 85 388) erzwingt die Verstelleinrichtung bei Überführung des Sitzmöbels aus der Arbeitsposition in die Ruheposition eine gleichzeitige synchrone Verstellung sowohl des vorderen Sitzteils als auch der Rückenlehne, als auch der Becken-Lendenstütze, deren Ausgangsabschnitt sich mindestens über den ganzen Lendenbereich der Wirbelsäule des Sesselbenutzers erstreckt. Befindet sich das bekannte Sitzmöbel in Arbeitsposition, so verläuft die Sitzfläche etwa horizontal. Die Verstelleinrichtung umfaßt einen über etwa 90° gekrümmten Stellhebel, der am Sitzteilträger angelenkt ist und an der Rückenlehne gelenkig angreift. Der Stellhebel ist mit Hilfe eines Pneumatik­zylinders schwenkbar. Die Becken-Lendenstütze ist über eine etwa vertikal angeordnete Feder auf dem Stellhebel abgestützt.In a known piece of seating of this type (EP-PS 01 85 388), the adjusting device forces a simultaneous synchronous adjustment of both the front seat part and the backrest, as well as the pelvic lumbar support, the output section of which, when the seating furniture is transferred from the working position to the rest position extends at least over the entire lumbar region of the spine of the chair user. If the known seating furniture is in the working position, the seating surface runs approximately horizontally. The adjusting device comprises a control lever which is curved over approximately 90 ° and which is articulated on the seat part carrier and articulates on the backrest. The adjusting lever can be swiveled using a pneumatic cylinder. The pelvic lumbar support is supported on the adjusting lever by an approximately vertically arranged spring.

Es ist auch bekannt, bei einem Sessel, die den Benutzer abstützende Sesselkontur in einen die Sitzfläche bildenden Teil, einen Becken­stutzteil und einen die Rückenlehne bildenden Teil aufzugliedern und die Beckenstütze verstellbar auszubilden. Letzteres auch derart, daß der Benutzer auf die Verstellung keinen Einfluß hat (DE-PS 1 256 840, Sp. 3, Zn. 39-47).It is also known to divide the armchair contour supporting the user into a part forming the seat surface, a pelvis support part and a part forming the backrest in an armchair and to make the pelvic support adjustable. The latter also in such a way that the user has no influence on the adjustment (DE-PS 1 256 840, column 3, lines 39-47).

Bei einem bekannten Sessel vergleichbarer Art ist die Schwinge in einer eingestellten Position mittels eines von einem Spannbolzen durchsetzten Reibschluß-Lamellen-Paketes fixierbar und eine zwangsweise und synchrone Neigenverstellung von Sitzteil und Rückenlehne etwa im Verhältnis 1:2 vorgesehen (Ausführungsbeispiel der Figuren 6, 6a).In a known armchair of a comparable type, the rocker arm can be fixed in a set position by means of a friction-locking lamella package through which a clamping bolt passes and a forced and synchronous inclination adjustment of the seat part and backrest is provided in a ratio of approximately 1: 2 (exemplary embodiment of FIGS. 6, 6a) .

Der Erfindung liegt die Aufgabe zugrunde, ein Sitzmöbel der eingangs genannten Art derart weiterzubilden, daß sich seine, die Sessel-­Schalenkontur in stabile Stütz- und flexible Elastikzonen aufglie­ dernden Schalenelemente bei Änderung der Sitzhaltung des Sessel­benutzers automatisch und stufenlos sowie wesentlich besser den sich dabei vollziehenden Bewegungsabläufen, also der aktiven Körper­motorik anpassen und den Körper des Sesselbenutzers im Becken-­Lendenbereich durchgehend abstützen.The invention has for its object to develop a seating of the type mentioned in such a way that his, the armchair shell contour in stable support and flexible elastic zones Changing shell elements when changing the seating position of the armchair user automatically and continuously and much better to adapt to the movement sequences taking place, i.e. the active body motor and supporting the body of the armchair user in the pelvic lumbar area throughout.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruches 1 genannten Merkmale gelöst. Bei einer solchen Ausbildung ist die Sitzfläche etwa zu einem Drittel durch die Becken-Lendenstütze gebildet. Die dritte Gelenkachse (36) liegt so niedrig, daß sie sich noch innerhalb des Lendenbereichs des Sesselbenutzers (= statisches Mittel der Körpergrößen) befindet. Das erzwungene Verschwenkungsverhältnis zwischen Becken-Lenden­stütze B und vorderem Sitzteil S hat zur Folge, daß die Sitzfläche bei Arbeitsstellung des Sitzmöbels gewissermaßen einen Knick auf­weist, indem die Stützfläche des Eingangsabschnittes b des Becken-­Lendenteiles (B) mit der angrenzenden Stützfläche des vorderen Sitzteiles S einen stumpfen Winkel (β in Fig. 2) einschließt. Mit der Möglichkeit einer körpermotorischen Ausschwenkung des über die dritte Schwenkachse angelenkten Rückenlehnenteils nach rückwärts gegen die Kraft einer Feder ist einem vielfachen Bedürf­nis, insbesondere junger Menschen, nach nach rückwärts gerichteten Rückendehnung Rechnung getragen, die bei Arbeitsstellung, bei Ruhestellung aber auch in Zwischenstellungen des Sitzmöbels voll­zogen werden kann. Ein extremes Zurückbiegen der Wirbelsäule ist mit einer entsprechenden erwünschten Dehnung der Magen- und Bauch­region verbunden.This object is achieved by the features mentioned in the characterizing part of claim 1. With such a design, about a third of the seat is formed by the pelvic lumbar support. The third joint axis (36) is so low that it is still within the lumbar region of the chair user (= static mean of the body sizes). The forced pivoting relationship between the pelvic lumbar support B and the front seat part S has the consequence that the seat surface has a kink to a certain extent when the seating is in the working position by the supporting surface of the input section b of the pelvic lumbar part (B) with the adjacent supporting surface of the front seat part S includes an obtuse angle (β in Fig. 2). With the possibility of a motor-driven pivoting of the backrest part articulated via the third pivot axis backwards against the force of a spring, a multiple need, in particular young people, for backward stretching is taken into account, which takes place in the working position, in the rest position, but also in intermediate positions of the seating furniture can be. Extreme bending back of the spine is associated with a corresponding desired stretching of the stomach and abdominal region.

Die gewichtsbezogene einstellbare Unterfederung der die Sitzschale aufnehmenden Schwinge des Sessels gewährleistet in Verbindung mit einer harmonisch abgestuften Aufpolsterung der verschiedenen Stützareale seiner Sitzschalen einen wohltuenden Sitz- und Rücken­kontakt, dank der großflächigen Aufnahme der Körperlast. Die Synchronverstellung von Sitzfläche, hinterer Übergangszone und Rückenlehnenprofil ergibt bei optimaler Beweglichkeit eine ermü­dungsarme Balance des Oberkörpers und verhindert in jeder Sitz­position ein übermäßiges Abkippen des Beckens.The weight-based, adjustable spring base of the swing arm of the armchair, which is used to hold the seat shell, in conjunction with a harmoniously graduated upholstery of the various support areas of its seat shell, ensures pleasant contact with the seat and back thanks to the large area of the body load. The synchronous adjustment of the seat, rear transition zone and backrest profile results in a fatigue-free balance of the upper body with optimal mobility and prevents the pelvis from tilting excessively in every sitting position.

Nachstehend wird die Erfindung anhand der Zeichnung an Ausführungsbei­spielen erläutert. Es zeigen:

  • Fig. 1 das in Arbeitsposition befindliche Sitzmöbel der Seite in schematischer Darstellung (weitere Gebrauchspositionen bis hin zur extremen Ruhe­stellung sind in gestricheleter Linienführung angedeutet),
  • Fig. 2 einen seitenverkehrten Ausschnitt aus dem Sitzmöbel gemäß Fig. 1 im Schnitt durch seine vertikale Symmetrieebene in vergrößerter Darstellung (Ruhe­stellung ist durch gestrichelte Linienführung der Sitzteilschwinge und der Beckenstütze ange­deutet),
  • Fig. 3 den vollständigen Ausschnitt gemäß Fig. 2 in Seitenansicht ohne Beckenpolsterschale bei Ruhe­stellung des Sessels.
  • Fig. 4 den Ausschnitt gemäß Fig. 3 ohne die Schalenele­mente von Sitzteil und Becken-Lenden-Stütze in Draufsicht,
  • Fig. 5 in schematischer Darstellung die Angriffspunkte der Steuerhebel zur Synchronverstellung der Bek­ken-Lenden-Stütze bei Arbeits-und Ruhestel­lung des Sessels,
  • Fig. 6-8 den Sitzteilträger im Vertikalschnitt, in Drauf­sicht und im Schnitt (Fig.8 ist ein Schnitt nach LinieIIX-IXvon Fig.7),
  • Fig. 9-11 die zusammen mit Sitzteilschale und zugehöriger Aufpolsterung das Sitzteil bildende Schwinge in Seitenansicht, Draufsicht und Vorderansicht,
  • Fig. 12-14 die zusammen mit einer Stützschale und zugehöri­ger Polsterung die Becken-Lenden-Stütze bildende Stützplatte in Vorderansicht, Draufsicht und Seitenansicht, letztere im Schnitt durch die vertikale Symmetriebene des Sessels,
  • Fig. 15, 16 eine Einrichtung zur Horizontalverschiebung der den Körper abstützenden Schalenkontur (Sitzteil S, Becken-Lendenstütze B und Rücken­lehne R des Sitzmöbels) in Abhängkeit von der Verschwenkung der Becken-Lendenstütze.
The invention is explained below with the aid of exemplary embodiments. Show it:
  • 1 the seating position of the page in the working position in a schematic representation (further use positions up to the extreme rest position are indicated in dashed lines),
  • 2 shows an inverted section of the seating furniture according to FIG. 1 in section through its vertical plane of symmetry in an enlarged representation (rest position is indicated by dashed lines of the seat part rocker and the pelvic support),
  • Fig. 3 shows the complete section of FIG. 2 in side view without pelvic cushion shell when the armchair is in the rest position.
  • 4 shows the section according to FIG. 3 without the shell elements of the seat part and pelvic lumbar support in a top view,
  • 5 shows, in a schematic representation, the points of application of the control levers for synchronously adjusting the Bekken-lumbar support when the armchair is in the working and resting position,
  • 6-8 the seat part carrier in vertical section, in plan view and in section (FIG. 8 is a section along line IIX-IX of FIG. 7),
  • 9-11 the rocker forming the seat part together with the seat part shell and associated padding in side view, top view and front view,
  • 12-14 the support plate forming the pelvic-lumbar support together with a support shell and associated padding in front view, top view and side view, the latter in section through the vertical plane of symmetry of the chair,
  • 15, 16 a device for the horizontal displacement of the body-supporting shell contour (seat part S, pelvic lumbar support B and backrest R of the seating furniture) as a function of the pivoting of the pelvic lumbar support.

Aus der schematischen Darstellung gemäß Fig. 1 wird die durch die Körperbewegung mögliche Überführung des Sitzmöbels aus einer für die Körperhaltung des arbeitenden Benutzers optimalen Position (Arbeitsposition gemäß ausgezogener Linienführung) in eine extreme rückwärtige Ruheposition (gestrichelte Linienführung), aber auch der Grundaufbau des Sitzmöbels verdeutlicht:
Das Fußgestell 10 umfaßt eine höhenveränderliche Stützspindel 10a. Von dieser ist ein Sitzteilträger 11 drehbar aufgenommen, der in den Fig. 6-8 dargestellt ist. Der Sitzteilträger ist im Bereich seines, mit Aufnahmebohrung versehenen Aufnahmeteils 11a auf das obere Ende der Stützspindel 10 aufgesteckt. Der Sitzteilträger 11 erstreckt sich unter Verbreiterung nach vorne, wo er in einen linear und quer zur Symmetrieebene b-b verlaufenden Lagerabschnitt 11b (Fig.4) ausläuft. An diesen Lagerabschnitt 11b sind Lageraugen 11c für die koaxialen Achsbolzen 12 der Schwinge 14 und weitere Lageraugen 11cʹ für die koaxialen Achsbolzen 32 der Synchronhebel 25 ange­formt, wie insbesondere aus den Fign. 6-8 in Verbindung mit Fig. 4 ersichtlich. Die vertikale Parallelprojektion des Sitzteilträgers entspricht etwa einem gleichschenkligen Dreieck, wie insbesondere aus Fig. 7 erkennbar.Das vordere Sitzteil S ist aus der Schwinge 14, der zugehörigen Sitzschale 18a und der Polsterung 18b gebildet und über die Schwinge 14 mit Hilfe der Achsbolzen 12 in einem der Vorderkante des Sitzteils S benachbaretn Bereich am Sitzteil­träger 11 angelenkt. Mit der Schwinge 14 ist rückseitig eine im Lendenbereich des Sesselbenutzers endende Becken-­Lendenstütze B über eine horizontale Schwenkachse 17ʹ verbunden. Die körpermotorische Verschwenkung von Sitzteil S und Becken-Lenden­stützteil B ist mit Hilfe von Synchronhebeln 25 derart synchroni­siert, daß eine Verschwenkung des Sitzteiles S eine Verschwenkung der Becken-Lendenstütze um einen Schwenkwinkel erzwingt, der um das 2,5-fache größer ist als der Schwenkwinkel des Sitzteils S. Die Rückenlehne R ist unmittelbar an die Oberkante der Becken-­Lendenstütze B angeschlossen und mit dieser über eine Schwenkachse 36 verbunden. Eine durch Körperbewegung bewirkte Ausschwenkung der Rückenlehne R nach rückwärts erfolgt entgegen der Wirkung einer Federkraft. Diese ist vorzugsweise durch Schenkelfedern 42 (in Fig.2 ) gebildet, die von den die Schwenkachse 36 bildenden Achsbolzen aufgenommen und deren Schenkel einerseits an der Becken-Lendenstütze B und andererseits an der Rückenlehne R anliegen.The schematic representation according to FIG. 1 illustrates the possible transfer of the seating furniture from a position which is optimal for the posture of the working user (working position according to solid lines) to an extreme rear resting position (dashed lines), but also the basic structure of the seating furniture :
The pedestal 10 comprises a height-adjustable support spindle 10a. A seat part carrier 11, which is shown in FIGS. 6-8, is rotatably received by the latter. The seat part carrier is plugged onto the upper end of the support spindle 10 in the region of its receiving part 11a provided with a receiving bore. The seat part carrier 11 extends widening forward, where it ends in a linear and transverse to the plane of symmetry bb section 11b (Fig.4). Bearing eyes 11c for the coaxial axle bolts 12 of the rocker arm 14 and further bearing eyes 11cʹ for the coaxial axle bolts 32 of the synchronizing lever 25 are molded onto this bearing section 11b, as shown in particular in FIGS. 6-8 in connection with Fig. 4 can be seen. The vertical parallel projection of the seat part carrier corresponds approximately to an isosceles triangle, as can be seen in particular in FIG. 7. The front seat part S is formed from the rocker arm 14, the associated seat shell 18a and the upholstery 18b and via the rocker arm 14 with the aid of the axle bolts 12 in one the front edge of the seat part S adjacent region articulated on the seat part carrier 11. With the rocker 14, a pelvic lumbar support B ending in the lumbar region of the chair user is connected via a horizontal pivot axis 17ʹ. The body motor pivoting of the seat part S and pelvic lumbar support part B is synchronized with the aid of synchronizing levers 25 such that pivoting the seat part S forces the pelvic lumbar support to be pivoted by a pivoting angle which is 2.5 times greater than the pivoting angle of the seat part S. The backrest R is connected directly to the upper edge of the pelvic lumbar support B and is connected to it via a pivot axis 36. A swiveling out of the backrest R caused by body movement takes place counter to the action of a spring force. This is preferably formed by leg springs 42 (in FIG. 2) which are received by the axle bolts forming the pivot axis 36 and whose legs rest on the lumbar lumbar support B on the one hand and on the backrest R on the other hand.

Wie insbesondere aus den Fign. 2 und 3 ersichtlich, verläuft der an das Sitzteil S anschließende Eingangsabschnitt b der Becken-Lenden­stütze B etwa senkrecht zu deren an die Rückenlehne R anschließenden Ausgangsabschnitt bʹ.Dieser Ausgangsabschnitt bʹ ist etwa halb so lang wie der Eingangsabschnitt. Eingangsabschnitt und Ausgangsabschnitt gehen über eine kreisbogenförmigen Krümmungsabschnitt k (Fig. 2) ineinander über. Die Synchronhebel 25 greifen über die koaxialen Achsbolzen 32 am Sitzteilträger 11 an. Die Achsbolzen 32 befinden sich etwa in einer durch die Schwenkachse 32ʹ (Fig. 1) der Schwinge 14 gebenden vertikalen Ebene a-a (Fig. 3). Anderends sind die Synchronhebel 25 über eine Querachse 30 am Becken-Lendenstützteil B angelenkt. Die Querachse 30 ist gegenüber der durch die Achsbolzen 17 gebildeten Schwenkachse 17ʹ der Becken-Lendenstütze B derart nach hinten und unten versetzt angeordnet, daß sich ein Verschwen­kungsverhältnis zwischen Schwinge 14 und Becken-Lendenstütze B von etwa 1/5 ergibt. Zur Arretierung der eingestellten Neigungen von Sitzteil S und Becken-Lendenstützteil B sind zwei Reibschluß-­Lamellenpakete 24,33 vorgesehen, die symmetrisch zur Symmetrieebene b-b (Fig. 4) liegen und von einem mittels Exzenter manuell steuer­baren Spannbolzen 22 durchsetzt sind. Das die Becken-Lendenstütze B arretierende Reibschluß-Lamellenpaket 24 ist über eine Querachse 30 und über einen zu dieser Querachse 30 parallelen Querbolzen 31 mit der Becken-Lendenstütze B starr verbunden und erstreckt sich nach vorne unter das Sitzteil S. Am vorderen, wesentlich verbreiterten Ende weist das Reibschluß-Lamellenpaket 24 seinen kreisbogenförmigen, vom Spannbolzen 22 durchgriffenen Längsschlitz auf. Das Reibschluß-Lamellenpaket 33 zur Arretierung der Schwinge 14 ist auf einer stationären Lagerachse 23 des Sitzteilträgers 11 schwenkbar gelagert, erstreckt sich etwa in vertikaler Richtung. Die Länge seines Langloches begrenzt den potentiellen Verschwenkungs­winkel der Schwinge 14 und damit des Sitzteiles S. Die Reibschluß-­Lamellen des Reibschluß-Lamellenpaketes 24 für die Becken-Lenden­stützte B und die Reibschluß-Lamellen des Reibschluß-Lamellenpaketes 33 für die Schwinge 14 liegen im Bereich des Spannbolzens 22 wechsel­weise aneinander, wodurch sich eine raumsparende Anordnung der Arretierungsmittel ergibt. Eine Schraubenfeder 13d zur Unterfede­rung der Schwinge 14 ist symmetrisch zur Symmetrieebene a-a (Fig. 4) zwischen der Stützspindel 10a und der Vorderkante des Sitzteils S angeordnet und dabei zwischen einem Stützlager der Schwinge 14 und einem unteren Lagerteller 13e gefangen. Die Schraubenfeder 13d ist mit einer Einrichtung 13 zur Veränderung ihrer Vorspannung versehen. Diese Einrichtung umfaßt einen mit einem Handrad 13a versehenen Schraubenbolzen 13b, der sich im Eingriff mit dem Innen­gewinde einer im Sitzteilträger 11 festgelegten Schraubenmutter 13c befindet, wie insbesondere aus Fig. 2 ersichtlich. Der Lagerteller 13e sitzt auf dem Schraubenbolzen 13b und kann somit die axiale Bewegungskomponente des sich drehenden Schraubenbolzens 13b auf die Schraubenfeder 13d übertragen. Zwei weitere beidseits der Symmetrieebene a-a angeordnete Schraubenfedern sind zur Unter­federung der Schwinge 14 vorgesehen. Deren Anordnung im Raum zwischen der Bohrung 10aʹ und Stützspindel 10a und der Schrauben­feder 13d ergibt sich aus Fig. 7, wo die Widerlager 11f für diese weiteren Schraubenfedern angedeutet sind. Aus der Fig. 7 ergibt sich auch die Position der Schraubenfeder 13d, indem dort die Stützfläche 11e erkennbar ist, auf welcher der Lagerteiler 13e bei geringer Vorspannung der Schraubenfeder 13d aufliegt. Mit 11i ist eine der Schraubenmutter 13c entsprechende Ausnehmung bezeichnet, in welcher diese Schraubenmutter 13c formschlüssig aufgenommen ist.As in particular from FIGS. 2 and 3 can be seen, the input section b of the lumbar lumbar support B adjoining the seat part S extends approximately perpendicularly to its output section bʹ adjoining the backrest R. This output section bʹ is approximately half as long as the input section. The inlet section and outlet section merge into one another via an arcuate section k (FIG. 2). The synchronizing lever 25 engages over the coaxial Axle pin 32 on the seat part support 11. The axle bolts 32 are located approximately in a vertical plane aa (FIG. 3) giving the rocker arm 14 through the pivot axis 32ʹ (FIG. 1). On the other hand, the synchronizing lever 25 is articulated on the pelvic lumbar support part B via a transverse axis 30. The transverse axis 30 is offset from the pivot axis 17 'formed by the axle bolts 17' of the pelvic lumbar support B in such a way back and down that there is a pivoting ratio between the rocker 14 and the pelvic lumbar support B of about 1/5. To lock the set inclinations of seat part S and pelvic lumbar support part B, two friction-locking plate packs 24, 33 are provided, which lie symmetrically to the plane of symmetry bb (FIG. 4) and are penetrated by a clamping bolt 22 which can be controlled manually by means of an eccentric. The pelvic lumbar support B arresting frictional lamella pack 24 is rigidly connected to the pelvic lumbar support B via a transverse axis 30 and a transverse bolt 31 parallel to this transverse axis 30 and extends forwardly under the seat part S. At the front, substantially widened end the frictional plate pack 24 has its arcuate longitudinal slot penetrated by the clamping bolt 22. The friction plate pack 33 for locking the rocker 14 is pivotally mounted on a stationary bearing axis 23 of the seat part carrier 11, extends approximately in the vertical direction. The length of its slot limits the potential pivot angle of the rocker 14 and thus the seat part S. The friction plates of the friction plate pack 24 for the lumbar lumbar supports B and the friction plates of the friction plate pack 33 for the rocker 14 are in the range of Clamping pin 22 alternately, which results in a space-saving arrangement of the locking means. A coil spring 13d for springing the rocker 14 is arranged symmetrically to the plane of symmetry aa (FIG. 4) between the support spindle 10a and the front edge of the seat part S and is thereby caught between a support bearing of the rocker 14 and a lower bearing plate 13e. The coil spring 13d is provided with a device 13 for changing its pretension. This device comprises a screw bolt 13b which is provided with a handwheel 13a and which engages with the internal thread of a screw nut 13c fixed in the seat part carrier 11 located, as can be seen in particular from FIG. 2. The bearing plate 13e sits on the screw bolt 13b and can thus transmit the axial movement component of the rotating screw bolt 13b to the coil spring 13d. Two further helical springs arranged on both sides of the plane of symmetry aa are provided for the suspension of the rocker 14. Their arrangement in the space between the bore 10aʹ and support spindle 10a and the helical spring 13d results from FIG. 7, where the abutments 11f are indicated for these further helical springs. The position of the helical spring 13d also results from FIG. 7, in that the support surface 11e can be seen there, on which the bearing divider 13e rests with a slight preload of the helical spring 13d. With 11i a recess corresponding to the screw nut 13c is designated, in which this screw nut 13c is received in a form-fitting manner.

Die die Schwenkachse 17ʹ (Fig. 1) bildenden Achsbolzen 17 (Fig. 2,3) durchsetzen Lageraugen 14b der Schwinge 14, die über die Lageraugen 14a auf den Achsbolzen 12 gelagert ist. Die Schwinge 14 weist, wie insbesondere aus Fig. 10 erkennbar, zwei sich zwischen den Lageraugen 14a und 14b erstreckende Schenkel 14c auf, die über eine Brücke 14f miteinander verbunden sind. Mit 14d sind Anformungen bezeichnet, welche ein Lager für die Klemmeinrichtung zur Arretierung der Neigung von Sitzteil S und Becken-Lendenstütze B bilden. Die Schwenkachse 36 der Rückenlehne R befindet sich bei Arbeitsstellung des Sessels etwa 14 cm über der Schwenkachse 17ʹ der Becken-Lendenstütze B. Bei extremer Ruhestellung des Sessels liegt die Stützfläche des Eingangsabschnittes der Becken-Lenden­stütze B und die Stützfläche des Sitzteils S in einer gemeinsamen, geringfügig nach rückwärts geneigten Ebene c-c (Fig. 3).The axle bolts 17 (FIGS. 2, 3) forming the pivot axis 17ʹ (FIG. 1) pass through bearing eyes 14b of the rocker arm 14, which is mounted on the axle bolts 12 via the bearing eyes 14a. The rocker 14, as can be seen in particular from FIG. 10, has two legs 14c which extend between the bearing eyes 14a and 14b and are connected to one another via a bridge 14f. With 14d formations are designated, which form a bearing for the clamping device for locking the inclination of the seat part S and pelvic lumbar support B. The pivot axis 36 of the backrest R is about 14 cm above the pivot axis 17ʹ of the pelvic lumbar support B when the armchair is in the working position. When the armchair is extremely at rest, the support surface of the input section of the pelvic lumbar support B and the support surface of the seat part S lie in a common, slightly backward inclined plane cc (Fig. 3).

In besonderen Fällen kann es zweckmäßig sein, die synchrone Ver­schwenkung der Becken-Ledenstütze B aus ihrer unteren Schwenk­stellung (Fig. 3) in ihre obere Schwenkstellung (Fig. 2) durch die Wirkung einer Federkraft, vorzugsweise durch Schenkelfedern 37 (Fig. 2,3) zu unterstützen.In special cases, it may be expedient to pivot the pelvic lumbar support B from its lower pivot position (FIG. 3) into its upper pivot position (FIG. 2) by the action of a spring force, preferably by leg springs 37 (FIG. 2, 3) ) to support.

Lehnt sich die auf dem Sitzmöbel sitzende Person nach Lösung der Arretierung der eingestellten Neigungen von Sitzteil S und Becken-­Lendenstütze B zurück, so wird das Sitzmöbel durch Körpermotorik aus einer Arbeitsstellung (Fig. 2, 15) in eine Ruhestellung (Fig. 3,16) überführt. In Ruhestellung kann die sitzende Person den Rücken entgegen der Kraft der Feder 42 nach rückwärts dehnen bzw. ausbiegen. Dadurch ergibt sich eine erhebliche Verlagerung des Körperschwerpunktes nach rückwärts, so daß die Gefahr eines Kippens des Sitzmöbels nach rückwärts besteht. Dieser Gefahr kann zum Beispiel durch eine entsprechende Beschränkung der Ausschwenkbarkeit der Rückenlehne R nach rückwärts begegnet werden.If the person sitting on the seating leans back after releasing the locking of the set inclinations of the seat part S and pelvic lumbar support B, the seating furniture is moved from a working position (Fig. 2, 15) to a rest position (Fig. 3.16) ) transferred. In the rest position, the seated person can stretch or bend his back back against the force of the spring 42. This results in a considerable shift of the body's center of gravity backwards, so that there is a risk of the seating furniture tipping over backwards. This danger can be countered, for example, by a corresponding restriction of the backrest R being able to be swung out backwards.

In vielen Fällen ist jedoch eine möglichst große Auschwenkbarkeit der Rückenlehne R zur erwünschten Rückendehnung gefordert. In diesem Fall kann zur zuverlässigen Vermeidung der Gefahr eines Kippens des Sitzmöbels nach rückwärts eine Einrichtung vorgesehen sein, die eine Verlagerung des Körperschwerpunktes nach vorne bewirkt, wenn sich die sitzende Person unter maximaler Ausschwenkung der Rückenlehne nach rückwärts lehnt. Wie diese Einrichtung aufgebaut ist und arbeitet, ist in den Schematas der Fig. 15 und 16 dargestellt: Die Achsbolzen 12 der Schwinge 14 sind in horizontalen Langlöchern 50 des stationären Sitzteilträgers 11 horizontal verschiebbar gelagert. Der maximale Verschiebeweg X entspricht der Länge der Langlöcher 50. Wie aus einem Vergleich der Figuren 15 und 16 erkennbar, ist die aus vorderem Sitzteil S, Becken-Lendenstütze B und Rückenlehne R gebildete, den Körper abstützende Schalenkontur beim Übergang des Sitzmöbels aus der Arbeitsstellung (Fig. 15) in die Ruhestellung (Fig. 16) um die Wegstrecke X nach rückwärts verschiebbar. Die Verschiebung wird mit Hilfe eines mit der Schwinge 14 für das Sitzteil S, der Stützplatte 15 für die Becken-Lendenstütze B und dem stationären Sitzteilträger 11 gelenkig verbundenen Hebelsystems H bewirkt. Dieses umfaßt zwei Hebel 51, die einenends am stationären Sitzteilträger 11 mittels Achsbolzen 52 und anderenends an der Schwinge 14 mittels Achsbolzen 53 angelenkt sind. Mit oberen Ver­längerungsenden 51ʹ der Hebel 51 sind über Achsbolzen 56 zwei weitere Hebel 54 gelenkig verbunden, die rückseitig mittels Achsbol­zen 55 dür Stützplatte 15 für die Becken-Lendenstütze B angelenkt sind. Die körpermotorisch bewirkbare Ausschwenkung des Rückenteils R entgegen der Wirkung der Feder 42 (Fig. 2) um die Achse 36 ist durch die in unterbrochener Linienführung angedeutete, nicht ausge­schwenkte Position der Rückenlehne verdeutlich. Die horizontale Verschiebung der aus vorderem Sitzteil S mit Schwinge 14, der Becken-Lendenstütze B mit Abstützplatte 15 und der Rückenlehne R gebildeten, körperabstützenden Schalenkontur als Bewegunseinheit um die Wegstrecke X nach rückwärts, wird durch das Abschwenken der Becken-Lendenstütze B bewirkt. Wie aus einem Vergleich der Fig. 15 und 16 erstichlich, werden dabei die Hebel 54 auf Grund einer Zwangsführung der Achsbolzen 55 um die Achse 17ʹ in einem Kreisbogen Kʹ aus einer Position gemäß Fig. 15 im wesentlichen nach vorne in eine Stellung gemäß Fig. 16 verschoben. Dadurch werden die Hebel 51 aus ihrer Stellung gemäß Fig. 15 in die Stellung gemäß Fig. 16 um die stationären Achsbolzen 52 verschwenkt. Da diese Hebel 51 in ihrer oberen Hälfte über die Achsbolzen 53 mit der Schwinge 14 gelenkig verbunden sind, wird durch ihre Verschwen­kung die vorstehend als Schalenkontur bezeichnete Bewegungseinheit um die Wegstrecke X nach vorne verschoben. Dadurch ergibt sich beim Übergang des Sitzmöbels aus der Arbeitsstellung gemäß Fig. 15 in Ruhestellung gemäß Fig. 16 eine Verschiebung des Körper­schwerpunktes der sitzenden Person nach vorne. Dadurch wird die Gefahr eines rückseitigen Abkippens des Sitzmöbels zuverlässig vermieden, auch wenn die sitzende Person sich in Ruhestellung unter maximaler rückseitiger Ausschwenkung der Rückenlehne nach hinten lehnt.In many cases, however, the greatest possible swiveling of the backrest R is required for the desired back stretching. In this case, a device can be provided to reliably avoid the risk of the seating unit tipping over, which causes the center of gravity to be shifted forward when the seated person leans backwards with the backrest swung out to the maximum. 15 and 16 shows how this device is constructed and works: The axle bolts 12 of the rocker arm 14 are horizontally displaceably mounted in horizontal elongated holes 50 of the stationary seat part carrier 11. The maximum displacement X corresponds to the length of the elongated holes 50. As can be seen from a comparison of FIGS. 15 and 16, the shell contour formed from the front seat part S, pelvic lumbar support B and backrest R is the body-supporting shell contour during the transition of the seating furniture from the working position ( Fig. 15) in the rest position (Fig. 16) by the distance X to the rear. The displacement is effected with the aid of a lever system H which is articulated to the rocker 14 for the seat part S, the support plate 15 for the lumbar lumbar support B and the stationary seat part carrier 11. This comprises two levers 51 which are articulated on one end to the stationary seat part support 11 by means of axle bolts 52 and at the other end on the rocker 14 by means of axle bolts 53. With upper extension ends 51ʹ of the lever 51 are 56 two axle bolts further levers 54 are articulated, which are articulated on the back by means of axle bolts 55 for support plate 15 for the pelvic lumbar support B. The swiveling out of the back part R against the action of the spring 42 (FIG. 2) about the axis 36, which can be effected by the body motor, is illustrated by the position of the backrest which is not swiveled out and is indicated by broken lines. The horizontal displacement of the body-supporting shell contour formed by the distance X backwards from the front seat part S with rocker 14, the pelvic lumbar support B with the support plate 15 and the backrest R is caused by the pivoting of the pelvic lumbar support B backwards. As can be seen from a comparison of FIGS. 15 and 16, the levers 54 are essentially forward to a position according to FIG. 16 due to a forced guidance of the axle bolts 55 about the axis 17ʹ in a circular arc Kʹ from a position according to FIG. 15 postponed. As a result, the levers 51 are pivoted from their position according to FIG. 15 into the position according to FIG. 16 about the stationary axle bolts 52. Since these levers 51 are articulated in their upper half via the axle bolts 53 to the rocker 14, the movement unit referred to above as the shell contour is shifted forward by the distance X by its pivoting. This results in a shift of the center of gravity of the seated person to the front during the transition of the seating furniture from the working position according to FIG. 15 into the rest position according to FIG. 16. As a result, the risk of the seating furniture tipping over on the back is reliably avoided, even if the seated person leans backwards in the rest position with the backrest swung out to the maximum.

Die durch die Becken-Lendenstütze B bestimmte Aufgliederung der nach nach sitzanatomischen Grundsätzen ausgeformten Schalenkontur die spezifische Synchronverstellung von Sitzteil S und Becken-­Lendenstütze B und die Möglichkeit der Rückfederung der an letztere anschließenden Rückenlehne führen zu einem 'dynamischen Sitzen' bei in der Becken-Lendenregion aufgerichteter Wirbelsäule.The breakdown of the shell contour, which is determined by the pelvic lumbar support B according to the principles of anatomical seating, the specific synchronous adjustment of the seat part S and the pelvic lumbar support B and the possibility of springing back of the backrest adjoining the latter result in 'dynamic sitting' in the pelvic lumbar region erect spine.

Claims (10)

1. Sitzmöbel mit neigungsverstellbarer Sitzfläche und Rückenlehne (R) mit einem eine höhenverstellung Stützspindel (10a) umfassenden Fußgestell (10) und einem von der Stützspindel (10a) aufgenommenen Sitzteilträger (11), an dessen vorderem Ende ein vorderes Sitzteil (S) über eine erste Schwenkachse (12) angelenkt und über einen Winkelbereich verstellbar ist, der die Horizontale mit einschließt, und mit einer über eine zweite Schwenkachse (17ʹ) rückseitig an das vordere Sitzteil (S) angelenkten Becken-Lendenstütze (B), deren an der Bildung der Sitzfläche mitwirkender Eingangsabschnitt (b in Fig. 2) etwa senkrecht zu ihrem Ausgangsabschnitt (bʹ in Fig. 2) verläuft, an welchem die Rückenlehne (R) über eine dritte Schwenkachse (36) angelenkt ist,
sowie mit einer Verstelleinrichtung zum Verändern der Neigung der Sitzfläche bei Überführung des Sitzmöbels aus einer Arbeits­position in eine Ruheposition, welche Sitzfläche bei eingestellter Ruheposition annäherungsweise in einer geringfügig nach rückwärts geneigten Ebene (c-c in Fig. 3) liegt,
dadurch gekennzeichnet, daß das vordere Sitzteil (S) als tragendes Element eine Stützplatte (15) aufweist,
daß die Verstelleinrichtung Synchronhebel (25) umfaßt, die einen­ends in derartigem Abstand von der Schwenkachse (12) am Sitzteil­träger (11) und anderenends in derartigem Abstand von der Schwenkachse (17ʹ) an der Stützplatte (15) angelenkt sind, daß sich bei Ver­schwenkung des vorderen Sitzteils (S) eine überproportionale Verschwenkung der Becken-Lendenstütze B) ergibt, deren Eingangs­abschnitt (b) länger ist als ihr in der Lendenregion der Wirbelsäule des Sesselbenutzers endender Ausgangsabschnitt (bʹ) und daß die Rückenlehne (R) um ihre Schwenkachse (36) durch Körper­bewegung des Sesselbenutzers entgegen der Wirkung einer Federkraft nach rückwärts ausschwenkbar ist.1. Seating furniture with an inclinable seat and backrest (R) with a foot frame (10) comprising a height-adjustable support spindle (10a) and a seat part carrier (11) accommodated by the support spindle (10a), at the front end of which a front seat part (S) has a the first pivot axis (12) is articulated and adjustable over an angular range, which includes the horizontal, and with a pelvic lumbar support (B) articulated on the back to the front seat part (S) via a second pivot axis (17), the support of which is based on the formation of the The input section (b in FIG. 2) that acts on the seat surface runs approximately perpendicular to its output section (bʹ in FIG. 2), on which the backrest (R) is articulated via a third pivot axis (36),
as well as with an adjustment device for changing the inclination of the seat surface when moving the seating furniture from a working position into a rest position, which seat surface is approximately in a slightly backward inclined plane (cc in FIG. 3) when the rest position is set,
characterized in that the front seat part (S) has a support plate (15) as a supporting element,
that the adjusting device comprises synchronizing lever (25) which are articulated at one end at such a distance from the pivot axis (12) on the seat part carrier (11) and at the other end at such a distance from the pivot axis (17ʹ) on the support plate (15) that when the front seat part (S) results in a disproportionate pivoting of the pelvic lumbar support B), the input section (b) of which is longer than its output section (bʹ) ending in the lumbar region of the spine of the chair user and that the backrest (R) can be pivoted backwards about its pivot axis (36) by body movement of the chair user against the action of a spring force. 2. Sitzmöbel nach Patentanspruch 1, dadurch gekennzeichnet, daß sich die Schwenkachse (36) der Rückenlehne (R) bei Arbeitsstellung des Sessels etwa 14 cm über der Schwenkachse (17ʹ) der Becken-­Lendenstütze (B) und im statistischen Mittel der Körpergrößen der Sesselbenutzer unterhalb des oberen Endes des Lendenbereiches der Wirbelsäule liegt.2. Seating furniture according to claim 1, characterized in that the pivot axis (36) of the backrest (R) in the working position of the armchair about 14 cm above the pivot axis (17ʹ) of the pelvic lumbar support (B) and the statistical average of the body sizes of the armchair users below the upper end of the lumbar region of the spine. 3. Sitzmöbel nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß die Synchronhebel (25) über koaxiale Achsbolzen (32) am Sitzteilträger (11) angreifen, welche Achsbolzen (32) sich etwa in einer durch die Schwenkachse (12 in Fig. 1) der Schwinge (14) gehenden vertikalen Ebene (a-a in Fig. 2,3 ) befinden und daß die Synchronhebel (25) anderenends über eine Querachse (30) am Becken-Lendenstützteil (B) angelenkt sind, welche Quer­achse (30) gegenüber der Schwenkachse (17ʹ) der Becken-Lendenstütze (B) derart nach hinten und unten versetzt angeordnet ist, daß sich ein Verschwenkungsverhältnis zwischen Schwinge (14) und Becken-Lendenstütze (B) von etwa 1:2,5 ergibt.3. Seating furniture according to claim 1 or 2, characterized in that the synchronizing levers (25) engage via coaxial axle bolts (32) on the seat part carrier (11), which axle bolts (32) are approximately in a through the pivot axis (12 in Fig. 1) the rocker (14) going vertical plane (aa in Fig. 2,3) and that the synchronizing lever (25) are articulated at the other end via a transverse axis (30) on the pelvic lumbar support part (B), which transverse axis (30) relative to the pivot axis (17ʹ) the pelvic lumbar support (B) is arranged offset to the rear and down that there is a pivoting ratio between the rocker (14) and pelvic lumbar support (B) of about 1: 2.5. 4. Sitzmöbel nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß bei der Verstelleinrichtung zwecks Arretierung der eingestellten Neigungen des vorderen Sitzteils (S) und der Becken-Lendenstütze (B) ein Lamellenpaket (24,33) Verwendung findet, das symmetrisch zur Symmetrieebene (b-b in Fig. 4) liegt und von einem mittels Exzenter manuelle steuerbaren Spannbolzen (22) durchsetzt ist.4. Seating furniture according to one of the preceding claims, characterized in that in the adjusting device for locking the set inclinations of the front seat part (S) and the pelvic lumbar support (B) a plate pack (24, 33) is used which is symmetrical to the plane of symmetry ( bb in Fig. 4) and is penetrated by a manually controllable clamping bolt (22) by means of an eccentric. 5. Sitzmöbel nach Patentanspruch 4, dadurch gekennzeichnet, daß ein Reibschluß-Lamellenpaket (24) über die Querachse (30) und über einen zu dieser Querachse parallelen Querbolzen (31) mit der Becken-Lendenstütze (B) starr verbunden ist, sich unter das Sitzteil (S) erstreckt und am vorderen, verbreiterten Ende einen kreisbogenförmigen, vom Spannbolzen (22) durchgriffenen Längsschlitz aufweist.5. Seating furniture according to claim 4, characterized in that a frictional plate pack (24) on the transverse axis (30) and a transverse bolt parallel to this transverse axis (31) with the pelvic lumbar support (B) is rigidly connected, under the The seat part (S) extends and has at the front, widened end an arcuate longitudinal slot penetrated by the clamping bolt (22). 6. Sitzmöbel nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß zur Arretierung der Schwinge (14) ein wei­teres, auf einer stationären Lagerachse (23) des Sitzteilträgers (11) schwenkbar gelagertes, sich etwa vertikal erstreckendes Reibschluß-Lamellenpaket (33) über ein Langloch vom Spannbolzen (22) durchsetzt ist,wobei die Reibschluß-Lamellen des Reibschluß-­Lamellenpaketes (24) für die Becken-Lendenstütze (B) und die Reibschluß-Lamellen des Reibschluß-Lamellenpaketes (33) für die Schwinge (14) im Bereich des Spannbolzens (22) wechselweise aneinanderliegen.6. Seating furniture according to one of the preceding claims, characterized in that for locking the rocker (14), on a stationary bearing axis (23) of the seat part carrier (11) pivotally mounted, approximately vertically extending friction plate pack (33) via a Elongated hole is penetrated by the clamping bolt (22), the friction locking plates of the friction locking plate pack (24) for the pelvic lumbar support (B) and the friction locking plates of the friction locking plate pack (33) for the rocker arm (14) in the area of Of the clamping bolt (22) alternately. 7. Sitzmöbel nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß eine vertikale Schraubenfeder (13d) zur Unterfederung der Schwinge (14) symmetrisch zur Symmetrieebene (a-a) zwischen der Stützspindel (10a) und der Vorderkante des Sitzteiles (S) angeordnet und mit einer Einrichtung zur Verände­rung der Vorspannung versehen ist, wobei weitere, beidseits der Symmetrieebene (a-a) angeordnete, vertikale Schraubenfedern (42 in Fig. 4) vorgesehen sind, die mit dem Spannbolzen (22) eine gemeinsame Symmetrieebene (d-d in Fig. 4) aufweisen.7. Seating furniture according to one of the preceding claims, characterized in that a vertical coil spring (13d) for supporting the rocker (14) symmetrically to the plane of symmetry (aa) between the support spindle (10a) and the front edge of the seat part (S) and arranged with one Device for changing the pretension is provided, further vertical coil springs (42 in FIG. 4) arranged on both sides of the plane of symmetry (aa) being provided, which have a common plane of symmetry (dd in FIG. 4) with the clamping bolt (22). 8. Sitzmöbel nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß die synchrone Verschwenkung der Becken-Len­denstütze (B) aus ihrer oberen Schwenkstellung (Fig. 2) in eine untere Schwenkstellung (Fig. 3) entgegen der Wirkung einer Feder­kraft (Schenkelfeder 37 in Fig. 2,3) erfolgt.8. Seating furniture according to one of the preceding claims, characterized in that the synchronous pivoting of the pelvic lumbar support (B) from its upper pivot position (Fig. 2) into a lower pivot position (Fig. 3) against the action of a spring force (leg spring 37 in Fig. 2,3) takes place. 9. Sitzmöbel nach einem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß die Schwenkbewegung der Abstützplatte (15) um die Schwenkachse (17ʹ) mittels eines am stationären Sitzteil­träger (11) angelenkten Hebelgestänges (H) in eine begrenzte Horizontalbewegung der Schwinge (14) umsetzbar ist.9. Seating furniture according to one of the preceding claims, characterized in that the pivoting movement of the support plate (15) about the pivot axis (17ʹ) by means of a lever linkage (H) articulated on the stationary seat part support (11) can be implemented in a limited horizontal movement of the rocker (14) . 10. Sitzmöbel nach Patentanspruch 9, dadurch gekennzeichnet, daß die Schwinge (14) über ihre Achsbolzen (12) in Länglöchern (50) verschieblich gelagert und die beim Übergang des Sitzmöbels von der Arbeitsstellung in die Ruhestellung bewirkt, abwärts ge­richtete Schwenkbewegung der Stützplatte (15) in eine nach vorne gerichtete Bewegung der Schwinge (14) umsetzbar ist.10. Seating furniture according to claim 9, characterized in that the rocker arm (14) via its axle bolts (12) in elongated holes (50) is displaceably mounted and causes the downward pivotal movement of the support plate (15) during the transition of the seating furniture from the working position to the rest position ) can be converted into a forward movement of the rocker (14).
EP87115073A 1986-10-15 1987-10-15 Sitting furniture Expired - Lifetime EP0265782B1 (en)

Priority Applications (1)

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AT87115073T ATE52671T1 (en) 1986-10-15 1987-10-15 SEATING.

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DE8627482U DE8627482U1 (en) 1986-10-15 1986-10-15 Armchair
DE3635044 1986-10-15
DE19863635044 DE3635044A1 (en) 1986-10-15 1986-10-15 ARMCHAIR

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EP0265782A2 true EP0265782A2 (en) 1988-05-04
EP0265782A3 EP0265782A3 (en) 1988-07-20
EP0265782B1 EP0265782B1 (en) 1990-05-16

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JP (1) JPS63186605A (en)
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DE (2) DE8627482U1 (en)

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Publication number Priority date Publication date Assignee Title
EP0394784A1 (en) * 1989-04-27 1990-10-31 Lineager S.R.L. Friction device for adjusting the inclination of a seat, in particular an office chair
EP0418731A1 (en) * 1989-09-16 1991-03-27 Rolf Völkle Chair
WO1991016874A1 (en) * 1990-05-01 1991-11-14 B.V. Optische Industrie 'de Oude Delft' Chair for disabled persons
US5447356A (en) * 1990-05-01 1995-09-05 B.V. Linido Chair for disabled persons
DE4040139A1 (en) * 1990-12-15 1992-06-17 Link Wilhelm Kg Office chair with divided seat - has articulated lever system for controlled adjustment between backrest and seat
US5423595A (en) * 1991-02-15 1995-06-13 Ashfield Engineering Company Wexford Limited Adjustment mechannism for locking relatively movable parts of furniture
GB2293971A (en) * 1994-10-11 1996-04-17 Kusch Co Sitzmoebel Seating furniture
GB2293971B (en) * 1994-10-11 1998-04-01 Kusch Co Sitzmoebel Adjustable seating furniture
WO2000062647A1 (en) * 1999-04-20 2000-10-26 Provenda Marketing Ag Chair mechanism
EP1410738A1 (en) * 2002-10-16 2004-04-21 ICF S.p.A. Chair with movable seat and backrest
WO2012170863A3 (en) * 2011-06-09 2013-04-18 Haworth, Inc. Forward sliding reclining chair
WO2013131658A1 (en) * 2012-03-08 2013-09-12 Walter Knoll Ag & Co. Kg Functional chair
US9833074B2 (en) 2012-03-08 2017-12-05 Walter Knoll Ag & Co. Kg Functional chair
US11440443B2 (en) 2019-10-29 2022-09-13 Grammer Ag Vehicle seat
DE102019131595A1 (en) * 2019-11-22 2021-05-27 Grammer Aktiengesellschaft Vehicle seat
US11279264B2 (en) 2019-11-22 2022-03-22 Grammer Ag Vehicle seat
DE102019131595B4 (en) 2019-11-22 2023-03-02 Grammer Aktiengesellschaft vehicle seat

Also Published As

Publication number Publication date
EP0265782A3 (en) 1988-07-20
JPH0455693B2 (en) 1992-09-04
US4848837A (en) 1989-07-18
EP0265782B1 (en) 1990-05-16
DE3635044C2 (en) 1988-09-08
CA1309334C (en) 1992-10-27
DE8627482U1 (en) 1989-07-06
JPS63186605A (en) 1988-08-02
DE3635044A1 (en) 1988-04-28

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