EP0772986A1 - Chaise - Google Patents

Chaise Download PDF

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Publication number
EP0772986A1
EP0772986A1 EP96118018A EP96118018A EP0772986A1 EP 0772986 A1 EP0772986 A1 EP 0772986A1 EP 96118018 A EP96118018 A EP 96118018A EP 96118018 A EP96118018 A EP 96118018A EP 0772986 A1 EP0772986 A1 EP 0772986A1
Authority
EP
European Patent Office
Prior art keywords
chair according
seat element
articulation points
chair
swivel arm
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
EP96118018A
Other languages
German (de)
English (en)
Other versions
EP0772986B1 (fr
Inventor
Martin Stoll
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.)
MARTIN STOLL GMBH & CO. KG.
Original Assignee
MARTIN STOLL GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MARTIN STOLL GmbH filed Critical MARTIN STOLL GmbH
Publication of EP0772986A1 publication Critical patent/EP0772986A1/fr
Application granted granted Critical
Publication of EP0772986B1 publication Critical patent/EP0772986B1/fr
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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame
    • A47C3/0255—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame pivotally mounted in the base frame, e.g. swings
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame
    • A47C3/0252—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame connected only by an elastic member positioned between seat and base frame

Definitions

  • the invention relates to a chair with a frame on which a seat element holding a backrest is pivotally held horizontally and transversely to its longitudinal axis by means of a pivoting device.
  • Such chairs enable the seat element and the backrest held on it to be tilted or swiveled to relax the seated person by shifting their weight backwards.
  • the pivot axis into the front region of the seat element.
  • the center of gravity of the seated person and the swivel axis of the chair are offset from one another. So that the seat element does not tilt backwards when sitting upright, but only when the seated person shifts his weight in the direction of the backrest, the weight of the seated person is usually balanced by a preloaded spring.
  • a weight balance is only possible if the preload is adjusted to the weight of the seated person.
  • Inadequate adjustment of the pretension of the spring has the consequence that either the seat element tilts backwards even when sitting upright, or that a pivoting movement only occurs when the pretension is overcome with the application of a certain force.
  • the object of the invention is to design a chair of the generic type so that regardless of the weight of the seated an inclination movement of the seat element only takes place when the seated person shifts his weight backwards.
  • the pivoting device comprises a joint with two mutually facing pivot arms, each held at a first articulation point on the frame and at a second articulation point on the seat element, and a the seat element when pivoting with an elastic one Resilient spring element.
  • the pivotable mounting of the seat element on the frame is thus carried out with the aid of the two pivot arms, which are articulated on the frame and on the seat element and face each other.
  • the weight of the seated person acts equally on both swivel arms, and since the two swivel arms face each other, the torque caused with respect to the first articulation point of one swivel arm is compensated for by the corresponding torque of the other swivel arm.
  • the center of gravity of the seated person acts regardless of his weight between the pivot points of the swivel arms, so that there is no inclination movement of the seat element.
  • the articulation points of the frame are trapezoidal, the second articulation points being positioned approximately on a line parallel to the connecting line of the first articulation points.
  • the swivel arms which each connect a first articulation point on the frame to a second articulation point on the seat element, thus form the oblique sides of the trapezoid, while the connecting lines of the two first articulation points and the two second articulation points are oriented essentially parallel to one another.
  • the articulation points form a mirror-symmetrical trapezoid.
  • the length of the two swivel arms thus corresponds. If the seated person exerts an equally large force on both swivel arms, the torques exerted on the first articulation point of the swivel arms are mutually compensated for, so that there is no inclination movement of the seat element.
  • a shift of the weight to the rear results in a symmetrical arrangement of the articulation points as well as an inclination movement of the seat element as a corresponding shift in the weight to the front.
  • the seat element is preferably to be inclined in one direction, it is advantageous if the articulation points of the frame form an asymmetrical trapezoid.
  • the length of the two swivel arms does not match, so that when the two swivel arms are loaded evenly, the corresponding torques are not compensated for but an inclination movement of the seat element takes place. If this is to be prevented, the two swivel arms must be loaded unevenly.
  • an inclination movement of the seat element is preferably to be carried out to the rear, it is advantageous if the distance between the articulation points of the swivel arm adjacent to the backrest is greater than the distance between the articulation points of the swivel arm adjacent to a front edge of the chair.
  • the torque of the swivel arm adjacent to the backrest causes an inclination movement.
  • An upright sitting is also possible, for this the seated person must consciously shift his weight forward and thus apply a greater force to the shorter swivel arm than the longer one.
  • the spring element acts directly on a swivel arm.
  • the swivel arm not only serves to hold the seat element on the frame, but also transmits the elastic restoring force exerted by the spring element to the seat element.
  • the spring element can be configured, for example, as a torsion spring. This enables a particularly space-saving arrangement of the spring element, for example on the underside of the seat element.
  • the joint is formed in one piece in the form of a U-shaped bracket held on the seat element, the two legs of which are designed as torsion springs, each of which is connected to a pivot arm projecting outwards, the free end of which is parallel is aligned with the legs and forms a pivot pin which plunges into a corresponding bore in the frame.
  • the joint can be formed, for example, from a round bar made of spring steel, which only has to be bent accordingly and, for example, fixed on the underside of the seat element. Such an embodiment is thus particularly inexpensive to manufacture.
  • a chair 10 which comprises an approximately horizontally oriented seat element 12, which is bent upward in its rear region opposite the front edge 13 of the chair and integrally merges into a backrest 14 and a seat cushion 16 is arranged on the upper side 15 thereof and a frame 18 with a rectangular frame 19 and chair legs 20 projecting vertically downwards.
  • the frame 19 is formed by longitudinal spars 21 and transverse spars 22 arranged parallel to each other.
  • a swiveling device 24 is arranged between the seat element 12 and the frame 18, by means of which the seat element 12 can be pivoted horizontally and transversely to its longitudinal axis, ie parallel to the front edge 13 of the chair.
  • the Swivel device 24 is formed by two identical joints 25 and 26, which are fixed in mirror image to each other on the underside 17 of the seat element 12 opposite the upper side 15 and 29 are designed as torsion springs, to which, pivoting outwards and obliquely downwards in the direction of the frame 19 of the frame 18, a swivel arm 30 or 31 connects, the free end of which is aligned parallel to the legs 28, 29 and forms a pivot pin 32 or 33.
  • the two legs 28 and 29 of the U-shaped bracket 27 are integrally connected to one another via a longitudinal strut 34 aligned parallel to the longitudinal direction of the chair.
  • the immovable holding of the legs 28 and 29 on the underside 17 is carried out with the aid of two retaining tabs 35.
  • the joints 25 and 26 are made of spring steel.
  • the pivot pins 32 and 33 dip into corresponding blind holes which are arranged on the mutually facing inner sides of the two longitudinal spars 21 and are not shown in the drawing.
  • the pivot pins 32 and 33 thus each form a first articulation point 36 and 37 for the pivotable mounting of the swivel arms 30 and 31 on the frame 18.
  • the second articulation points of the swivel arms 30 and 31 form the transition regions 38 and 39 between the swivel arms 30, 31 and themselves adjoining legs 28 and 29 designed as torsion springs.
  • the articulation points form essentially horizontal at Aligned seat element 12 approximately a trapezoid, the connecting line of the first articulation points 36 and 37 being aligned essentially parallel to the connecting line of the second articulation points 38 and 39, and the swivel arms 30 and 31 forming the oblique sides of the trapezoid.
  • FIG. 4 shows the orientation of the swiveling device 24 when the seated person is in an upright position.
  • the seat element 12 assumes an essentially horizontally oriented basic position, since the center of gravity of the seated person, not shown in the drawing, acts between the two second articulation points 38 and 39 of the swivel arms 30 and 31, respectively, and those acting on the first two articulation points 36 and 37 Compensate torques with each other.
  • the second pivot point 39 of the pivot arm 31 adjacent to the backrest 14 is thus loaded more than the second pivot point 38 of the pivot arm 30 adjacent to the front edge 13, so that the pivot arm 31 and lower the rear area of the seat element 12 with it while the swivel arm 30 and with it the front area of the seat element 12 rise slightly.
  • the seat element 12 assumes a corresponding position, not shown in the drawing, in which the swivel arm 30 moves due to the greater load on the second articulation point 38 due to the weight of the seated person lowers while the back arm 14 adjacent to the backrest 14 is raised slightly.
  • the two joints 25, 26 of the swivel device 24 thus form an overall oscillating suspension of the seat element 12, which assumes a substantially horizontal position regardless of the weight of the seated person, and which can be swiveled forward and backward by shifting the weight. No additional force is required for pivoting, since the legs 28 and 29 designed as torsion springs do not exert any force on the pivot arms 30 or 31 in the basic position of the seat element 12.

Landscapes

  • Chairs Characterized By Structure (AREA)
EP96118018A 1995-11-11 1996-11-10 Chaise Expired - Lifetime EP0772986B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542132A DE19542132C2 (de) 1995-11-11 1995-11-11 Stuhl
DE19542132 1995-11-11

Publications (2)

Publication Number Publication Date
EP0772986A1 true EP0772986A1 (fr) 1997-05-14
EP0772986B1 EP0772986B1 (fr) 2001-06-20

Family

ID=7777246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118018A Expired - Lifetime EP0772986B1 (fr) 1995-11-11 1996-11-10 Chaise

Country Status (3)

Country Link
EP (1) EP0772986B1 (fr)
AT (1) ATE202266T1 (fr)
DE (1) DE19542132C2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001000060A1 (fr) * 1999-06-24 2001-01-04 Lord Corporation Systeme de suspension de siege a plusieurs degres de liberte
WO2001035798A1 (fr) * 1999-11-17 2001-05-25 Martela Oyj Chaise
EP1551255A4 (fr) * 2002-09-12 2006-06-14 Steelcase Dev Corp Fauteuil reglable
EP1839530A1 (fr) * 2006-03-31 2007-10-03 Bacher Tische M. & W. Bacher GmbH Meuble d'assise
US7416251B2 (en) 2005-06-10 2008-08-26 Global Total Office Chair

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7226130B2 (en) 2002-09-12 2007-06-05 Steelcase Development Corporation Seating with comfort surface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363438A (en) * 1930-10-02 1931-12-24 Frederick Augustus Greaves Improvements in and relating to chairs, settees and the like
US3070342A (en) * 1959-04-23 1962-12-25 Middletown Mfg Company Rocking chair with declining legs
US4536029A (en) * 1983-03-30 1985-08-20 Parma Corporation Rocking chair

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7112092U (de) * 1971-03-30 1971-09-02 Drabert Soehne Halterung fuer ein neigbares sitzmoebeloberteil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363438A (en) * 1930-10-02 1931-12-24 Frederick Augustus Greaves Improvements in and relating to chairs, settees and the like
US3070342A (en) * 1959-04-23 1962-12-25 Middletown Mfg Company Rocking chair with declining legs
US4536029A (en) * 1983-03-30 1985-08-20 Parma Corporation Rocking chair

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001000060A1 (fr) * 1999-06-24 2001-01-04 Lord Corporation Systeme de suspension de siege a plusieurs degres de liberte
US6688689B1 (en) 1999-06-24 2004-02-10 Lord Corporation Multiple degree of freedom seat suspension system
WO2001035798A1 (fr) * 1999-11-17 2001-05-25 Martela Oyj Chaise
EP1551255A4 (fr) * 2002-09-12 2006-06-14 Steelcase Dev Corp Fauteuil reglable
US7234774B2 (en) 2002-09-12 2007-06-26 Steelcase Development Corporation Seating unit with novel flexible supports
CN1787766B (zh) * 2002-09-12 2010-12-08 斯特尔凯斯公司 具有运动控制装置的座椅装置
US7416251B2 (en) 2005-06-10 2008-08-26 Global Total Office Chair
EP1839530A1 (fr) * 2006-03-31 2007-10-03 Bacher Tische M. & W. Bacher GmbH Meuble d'assise

Also Published As

Publication number Publication date
DE19542132C2 (de) 1997-11-27
EP0772986B1 (fr) 2001-06-20
DE19542132A1 (de) 1997-05-15
ATE202266T1 (de) 2001-07-15

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