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EP0846429A2 - Stuhl - Google Patents

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Publication number
EP0846429A2
EP0846429A2 EP97203375A EP97203375A EP0846429A2 EP 0846429 A2 EP0846429 A2 EP 0846429A2 EP 97203375 A EP97203375 A EP 97203375A EP 97203375 A EP97203375 A EP 97203375A EP 0846429 A2 EP0846429 A2 EP 0846429A2
Authority
EP
European Patent Office
Prior art keywords
structure according
chair structure
backrest
frame
slot
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.)
Withdrawn
Application number
EP97203375A
Other languages
English (en)
French (fr)
Other versions
EP0846429A3 (de
Inventor
Antonio Dal Monte
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.)
Clerprem SpA
Original Assignee
Clerprem SpA
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 Clerprem SpA filed Critical Clerprem SpA
Publication of EP0846429A2 publication Critical patent/EP0846429A2/de
Publication of EP0846429A3 publication Critical patent/EP0846429A3/de
Withdrawn legal-status Critical Current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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • 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
    • 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—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/405—Supports for the head or the back for the back with double backrests

Definitions

  • the present invention relates in general to a chair structure for continuous use by the same person for prolonged sessions as is the case, for example, with chairs used in offices, laboratories, data-processing centres and similar so-called sedentary work-stations.
  • the problem upon which the present invention is based is that of providing a chair particularly for so-called sedentary work-stations, which has structural and functional characteristics such that, as well as satisfying all of the requirements set out above, it can be adapted quickly and easily ad personam, that is, it can be adapted to changed requirements of the same person, even within the same "session", all without in any way hindering the user's ability to work.
  • a chair according to the invention comprises a base 2 with wheels 3 which are orientable in some manner, a telescopically-extendable pillar 4 extending from centre of the base, means not shown since they are wholly conventional for adjusting the height of the pillar 4, a seat, generally indicated 5, supported by the pillar 4 and rotatable relative to the base 2, and a backrest 6 supported by a curved, resiliently yielding arm 7, with marked concavity facing towards the seat 5 with the rear of which it is associated in the manner which will be described further below.
  • the seat 5 in turn comprises a substantially box-like frame 8 for supporting a body 9, preferably made of a suitable resiliently-deformable material, for example and preferably, a plastics material such as nylon.
  • a pad/squab 10 is associated with the body 9, to which it is fixed in order substantially to form a single body with regard to "movements or displacements" and/or the deformations which the body 9 has to undergo (also limited to its parts) for the desired adjustments of the seat of the invention, as will become clear from the following description.
  • the body 9 is controlled by means for adjusting its fore-and-aft inclination to the horizontal.
  • the body 9 is mounted for pivoting on pins 11, 11 carried by opposite sides 8a, 8b of the box-like frame 8 and defining a horizontal articulation axis (with reference to the chair 1 in its condition of use), transverse the body.
  • a shaft 12 parallel to the articulation axis of the body is supported for rotating by the sides 8a, 8b of the frame 8 and two pinions 13, 13 are keyed to the shaft 12. These pinions 13, 13 are in engagement with respective racks 14, 15 slidable in guides 16, 17 fixed to or otherwise formed in the frame 8 and extending perpendicular to the shaft 12.
  • Respective vertical supports 18, 19 are fixed to the front portions of the racks and a respective idle wheel (or roller) 20, 21 is associated with the top of each support 18, 19 with its axis parallel to the articulation axis 11-11.
  • the wall of the body 9 facing the frame 8 defines, at the front, two straight ramps 22, 23 inclined downwardly towards the front of the body.
  • Each ramp 22, 23 is intended to be engaged by a corresponding idle wheel 20, 21 for which it constitutes essentially a straight cam profile.
  • the racks 14 and 15 and the wheels 20, 21 fixed thereto can be moved to and fro along the respective guides 16, 17 in the two directions towards the front and towards the rear of the seat 5.
  • the racks 14, 15 may be fixed to the frame 8 and the pinions 13, 13 and the shaft 12 to which they are keyed may be free to translate.
  • the shaft 12 will again be supported for rotation by the frame 8 with the formation of slit-like slots in the opposite sides 8a, 8b of the frame to allow the shaft 12 and the pinions 13-13 associated therewith to perform the desired rectilinear movements in opposite directions.
  • the idle wheels 20-21 (or rollers) in this case are fixed for rectilinear movement with the pinions 13-13.
  • the body 9 and the squab 10 are formed with an accentuated transverse concavity ( Figure 1) so as to achieve a marked "wrap-around” effect with consequent considerable lateral restraint.
  • the body 9 is controlled by means for gradually varying its transverse concavity.
  • a shaft 25a supported for rotation by opposite sides 8a, 8b of the frame 8 extends beneath the front portion of the body 9.
  • Two threaded portions 26, 27 with right-hand and left-hand threads formed on the shaft 25a in the region of the parts 9a, 9b of the front portion are engaged by respective threaded sleeves (or nuts) 28, 29 ( Figure 7).
  • a corresponding wedge 30, 31 fixed to each of the said sleeves 28, 29 extends transversely relative to the body 9 and has an upper active profile extending transversely relative to the body; the active profile matches and is engaged with the profile of the respective part 9a, 9b of the front body portion.
  • the wedges 30, 31 are moved towards one another or apart, that is, towards and away from the centre of the front body portion.
  • the parts 9a, 9b of the body are gradually raised with a consequent increase in the transverse concavity of the front portion.
  • a U-shaped slot 34 with sides extending towards the front of the seat is formed ( Figure 8) in the central rear region of the squab/pad 10 where, statistically, the bony "projections" of the user's pelvis and coccyx are supported.
  • the slot 34 also affects the underlying body 9 ( Figure 3).
  • this slot 34 substantially reduces the amount of pressure which is normally exerted on the aforesaid bony projections when chairs of the prior art are in use. This reduction results in a delay in the onset of a condition of restlessness (and often discomfort) which always arises when a fixed position is maintained for too long.
  • the presence of the slot 34 considerably improves ventilation in a region of the body which, as is well known, is characterized by the highest skin temperatures.
  • a further advantage of the slot 34 is of a static nature, since the lateral portions of the user's buttocks and thighs are "loaded", and a widened support base characterized by reduced pressure and in particular by an absence of excessive pressure peaks is created in these portions.
  • the arm 7 supporting the backrest 6 is preferably constituted by a resiliently-deformable metal strip which, in accordance with a non-limiting embodiment, comprises an arcuate central portion 7a with marked concavity, extended by a straight portion 7b and, at the other end, by a branched, Y-shaped end portion forming two identical wings 7c, 7d.
  • the straight portion 7b ( Figure 2) is engaged for sliding in an essentially sheath-like guide 35 defined in the frame 8 beneath the body 9 and extending longitudinally relative to the seat 5.
  • Means are provided for positioning the portion 7b adjustably along the respective guide 35 so that the backrest 6 can be moved away from or towards the seat 5 at will.
  • These means are wholly conventional and comprise, for example, one (or more) pins 36 fixed to the straight portion 7b and a plurality of holes 37 formed in the guide 35 and aligned along it at a predetermined pitch.
  • a grip 38 is provided for moving the backrest 6 along the axis defined by the guide 35 and is fixed to the arm 7, for example, in the region in which it branches into the two wings 7c, 7d ( Figure 9).
  • the backrest 6 is constituted by two identical, independent portions 39, 40 actuated independently by identical mechanisms so that they can be adapted to the user's back in the manner described below.
  • Each of the portions 39, 40 and the respective actuating mechanism are mounted on a respective wing 7c, 7d of the support 7, as will become clear from the following description relating to only one of them.
  • each wing 7c (7d) supports for rotation a shaft 41 to which a pinion 42 and an operating knob 43 (43a) are keyed in the front portion and in the rear portion of the backrest 6, respectively.
  • Two identical idle gears 44, 45 supported by the same wing 7c (7d) mesh with the pinion 42.
  • the idle gears 44, 45 have respective eccentric pins 46, 47 (crank pins) which extend from the same side and the axes of which, in a preferred but not exclusive embodiment, lie in the same horizontal plane.
  • the backrest portion 39, 40 in question is fixed to the eccentric pins 46, 47 and follows all of their movements (like a connecting rod).
  • each portion 39, 40 of the backrest 6 is constituted by two plate-like elements 39a, 39b ( Figure 11) connected to one another by means of a universal joint 48 (or ball joint or equivalent system), the element 39a being associated with the eccentric pins 46, 47, and the element 39b being intended to "cling" to the user's back.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
EP97203375A 1996-12-06 1997-10-30 Stuhl Withdrawn EP0846429A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96PD000301 IT1288007B1 (it) 1996-12-06 1996-12-06 Struttura di sedia
ITPD960301 1996-12-06

Publications (2)

Publication Number Publication Date
EP0846429A2 true EP0846429A2 (de) 1998-06-10
EP0846429A3 EP0846429A3 (de) 2000-05-17

Family

ID=11391595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97203375A Withdrawn EP0846429A3 (de) 1996-12-06 1997-10-30 Stuhl

Country Status (2)

Country Link
EP (1) EP0846429A3 (de)
IT (1) IT1288007B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003068114A1 (fr) * 2002-02-14 2003-08-21 Alexei Alexeevich Bykov Procede pour decharger la colonne vertebrale
WO2011005231A1 (en) * 2009-07-06 2011-01-13 Burosit Buro Donanimlari Sanayi Ve Ticaret Anonim Sirketi Sitting apparatus providing body ergonomy
CN109124132A (zh) * 2018-09-19 2019-01-04 宁波市玄图数字科技有限公司 办公座椅调节装置
CN119055480A (zh) * 2024-10-31 2024-12-03 佛山市思福特医疗设备有限公司 牙科诊疗椅

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463547A (en) * 1967-10-20 1969-08-26 John M Brennan Flexible chair seat
US4183492A (en) * 1977-10-11 1980-01-15 Willibald Grammer Vehicle seat
US4339103A (en) * 1979-07-26 1982-07-13 Toyota Jidosha Kogyo Kabushiki Kaisha Device for adjusting inclined angle of seating surface of seat cushion
EP0071710A2 (de) * 1981-08-05 1983-02-16 SITAG Sitzmöbel AG. Arbeitsstuhl mit einstellbarer Sitzfläche und Rückenlehne
US4479679A (en) * 1981-06-08 1984-10-30 Steelcase Inc. Body weight chair control
EP0343120A1 (de) * 1988-05-18 1989-11-23 PRO-CORD s.r.l. Stuhl mit Schaukelsitz
WO1990000873A1 (de) * 1988-07-19 1990-02-08 'aura' Herbert D. Stolle Gmbh & Co. Rückenlehne
WO1991018539A1 (de) * 1990-06-05 1991-12-12 'aura' Herbert D. Stolle Gmbh & Co. Rückenlehne
DE4220332A1 (de) * 1991-06-25 1993-01-14 Normalien Srl Vorrichtungen fuer die schraegstellung der lehne und der sitzflaeche bei sesseln und lehnstuehlen
US5580128A (en) * 1994-08-10 1996-12-03 Johnson; Robert E. Therapeutic seat
EP0772987A2 (de) * 1995-09-08 1997-05-14 Everwijn Petrus Maria Ridder Stuhl oder Sessel

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3463547A (en) * 1967-10-20 1969-08-26 John M Brennan Flexible chair seat
US4183492A (en) * 1977-10-11 1980-01-15 Willibald Grammer Vehicle seat
US4339103A (en) * 1979-07-26 1982-07-13 Toyota Jidosha Kogyo Kabushiki Kaisha Device for adjusting inclined angle of seating surface of seat cushion
US4479679A (en) * 1981-06-08 1984-10-30 Steelcase Inc. Body weight chair control
EP0071710A2 (de) * 1981-08-05 1983-02-16 SITAG Sitzmöbel AG. Arbeitsstuhl mit einstellbarer Sitzfläche und Rückenlehne
EP0343120A1 (de) * 1988-05-18 1989-11-23 PRO-CORD s.r.l. Stuhl mit Schaukelsitz
WO1990000873A1 (de) * 1988-07-19 1990-02-08 'aura' Herbert D. Stolle Gmbh & Co. Rückenlehne
WO1991018539A1 (de) * 1990-06-05 1991-12-12 'aura' Herbert D. Stolle Gmbh & Co. Rückenlehne
DE4220332A1 (de) * 1991-06-25 1993-01-14 Normalien Srl Vorrichtungen fuer die schraegstellung der lehne und der sitzflaeche bei sesseln und lehnstuehlen
US5580128A (en) * 1994-08-10 1996-12-03 Johnson; Robert E. Therapeutic seat
EP0772987A2 (de) * 1995-09-08 1997-05-14 Everwijn Petrus Maria Ridder Stuhl oder Sessel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"ENTSPANNTE SITZHALTUNG" BETRIEBSTECHNIK,DE,TECHNISCHER VERLAG RESCH KG. GRAEFELFING, vol. 35, no. 6, 1 June 1994 (1994-06-01), page 56 XP000453853 ISSN: 0409-2791 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003068114A1 (fr) * 2002-02-14 2003-08-21 Alexei Alexeevich Bykov Procede pour decharger la colonne vertebrale
WO2011005231A1 (en) * 2009-07-06 2011-01-13 Burosit Buro Donanimlari Sanayi Ve Ticaret Anonim Sirketi Sitting apparatus providing body ergonomy
CN109124132A (zh) * 2018-09-19 2019-01-04 宁波市玄图数字科技有限公司 办公座椅调节装置
CN109124132B (zh) * 2018-09-19 2021-06-08 宁波市玄图数字科技有限公司 办公座椅调节装置
CN119055480A (zh) * 2024-10-31 2024-12-03 佛山市思福特医疗设备有限公司 牙科诊疗椅

Also Published As

Publication number Publication date
ITPD960301A1 (it) 1998-06-06
EP0846429A3 (de) 2000-05-17
IT1288007B1 (it) 1998-09-10

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