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EP0108760B1 - Siege articule - Google Patents

Siege articule Download PDF

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Publication number
EP0108760B1
EP0108760B1 EP83901349A EP83901349A EP0108760B1 EP 0108760 B1 EP0108760 B1 EP 0108760B1 EP 83901349 A EP83901349 A EP 83901349A EP 83901349 A EP83901349 A EP 83901349A EP 0108760 B1 EP0108760 B1 EP 0108760B1
Authority
EP
European Patent Office
Prior art keywords
seat
axis
back rest
chair
user
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83901349A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0108760A1 (fr
Inventor
Jacques Lescure
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.)
Ami Francaise SA
Original Assignee
Ami Francaise SA
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 Ami Francaise SA filed Critical Ami Francaise SA
Priority to AT83901349T priority Critical patent/ATE24383T1/de
Publication of EP0108760A1 publication Critical patent/EP0108760A1/fr
Application granted granted Critical
Publication of EP0108760B1 publication Critical patent/EP0108760B1/fr
Expired 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

Definitions

  • the present invention relates to a seat whose various elements, and in particular the backrest and the seat are articulated together along parallel axes, which allows the user to move from a sitting position to a lying position.
  • Hinged seats are known in which the two aforementioned positions as well as intermediate positions between them can be chosen in advance by the user.
  • the user When in use of the seat, the user wishes to change position, he is obliged to leave the seat to unlock locking means which fix the seat in its different positions, then move the seat and the backrest the newly chosen position and unlock the locking means again in this position.
  • the user can modify the inclination of the backrest by actuating a lever or a control button.
  • the center of gravity of the user's body acts in a favorable direction, which facilitates the movement of the backrest towards this position.
  • the user wishes to move from the lying position to the sitting position, he must necessarily get up to be able to straighten the backrest, since the center of gravity of the user's body acts in an unfavorable direction.
  • FR-A-1 124 109 describes improvements to seats convertible into beds, such as sofa beds. These improvements relate essentially to the shape and position of guide rails, thereby improving the balance and aesthetics of the furniture. But the transformation from seat to bed, or vice versa, requires the operator to rest on the ground. He cannot carry out the transformation while remaining on the seat.
  • FR-A-1 297 900 describes an articulated armchair for rest and medical treatment.
  • a certain effort is necessary to pass from the seat position to the bed position, and this requires a support on the floor. Balancing the chair by springs cannot compensate for the effort required for all patients, given the dispersion of their weight.
  • the object of the present invention is to remedy the drawbacks of the abovementioned embodiments, by creating an articulated seat which allows the user to continuously modify the relative positions of the backrest and the seat, without having to leave the seat, to straighten up or to exert significant efforts.
  • the articulated seat targeted by the invention comprises at least one file articulated along an axis fixed relative to the seat and articulated to a seat along an axis fixed relative to the latter.
  • this file and this seat being continuously movable relative to each other between a position in which the file is substantially vertical and the seat is substantially horizontal and a position in which the file and the seat are substantially horizontal.
  • this seat is characterized in that the movement of the seat is guided opposite its axis of articulation with respect to the backrest along a curve whose concavity is directed towards the upper end of the backrest, the distance between the axes being small relative to the lever arm constituted by the backrest, so that when the backrest and the seat move between the two aforementioned positions, the center of gravity of the body of the seat user remains substantially at the same level, for all the relative positions of the backrest and seat.
  • the center of gravity of the user's body deviates very little from a horizontal plane, the user is in all the relative positions of the backrest and the seat, in a situation very close to the balance, so that it is enough to exert a very slight pressure on the seat or on the backrest to change its position on the seat.
  • the seat according to the invention thus provides the user with optimal comfort.
  • the seat comprises at least one backrest and one seat articulated together along a movable axis, the backrest being articulated along an axis of the seat and the seat being articulated to the seat along an axis opposite to the movable axis, this backrest and this seat being continuously movable relative to each other between a position in which the backrest is substantially vertical and the seat is substantially horizontal and a position in which the backrest and the seat are substantially horizontal.
  • This seat is characterized in that the axis of articulation of the backrest, the axis of articulation of the backrest with the seat and the axis of articulation of the seat are movable according to fixed guide curves relative to the seat and determined so that the center of gravity of the body of the seat user remains at substantially the same level for all the relative positions of the backrest and the seat, the position of the aforementioned axes and said guide curves being defined by as follows: the axis of articulation of the seat and the axis of articulation of the latter with respect to the backrest are located above the bearing surface of the seat, the axis of articulation of the backrest is located at the rear of the backing surface of the backrest, the curve for guiding the axes of articulation of the seat and the latter with the backrest comprise a first part making it possible to guide the inclination of the seated between a position substantially horizontal and a position inclined backwards, at an angle of between 20 and 35 ° approximately and a second part
  • the curve for guiding the axis of articulation of the backrest is an arcuate curve whose concavity is directed towards the end of the guide curve for the axis of articulation of the backrest with the seat.
  • the guide curve of the axis of the backrest with the seat is substantially L-shaped, one of the branches extending forward and is inclined downwards and the other branch extending upwards and the guide curve of the seat articulation axis has a rectilinear part substantially parallel to the second branch of the L-shaped guide curve, the end of this rectilinear part having an arc directed towards the before.
  • the guide curves of the aforementioned axes can be defined by grooves fixed relative to the seat in which are engaged rollers fixed to the opposite ends of the aforementioned movable axes.
  • the seat according to the invention comprises means, such as clamping means, accessible to the hands of the user in position on the seat and making it possible to block at least one of the joints of the seat and the backrest in all seat positions.
  • means such as clamping means
  • FIG. 1 to 7 relates to a simplified version of a seat according to the invention.
  • it is a garden armchair made of plastic.
  • This chair has a backrest 1, a seat 2 and four feet 3, 4, the feet 3 carrying at their upper part two armrests 3a.
  • the backrest 1 is articulated along a fixed horizontal axis XX 'situated at the upper ends of the two rear legs 3. This backrest 1 is itself articulated at the seat 2, along a movable axis Y-Y', parallel to the axis XX 'mentioned above.
  • the backrest 1 and the seat 2 are continuously movable, one with respect to the other, between a position in which the backrest is substantially vertical (see FIGS. 2 and 4) and the substantially horizontal seat which corresponds to a seated position of the user, and a position in which the backrest 1 and the seat 2 form between them an angle of the order of 120 ° (see Figures 3 and 6) allowing the user to lie down.
  • the movement of the seat 2 is guided opposite its axis of articulation YY 'relative to the backrest 1, along a portion of curve AB defined by a fixed groove 5 formed on each side of the seat 2, in flanges 6 perpendicular to the latter.
  • These grooves 5 are arranged under the support plane of the seat 2 and have an arcuate shape. The concavity of these grooves 5 is directed towards the upper end of the backrest 1.
  • each groove 5 The portion of curve AB defined by each groove 5 is determined so that when the backrest 1 and the seat 2 are moved according to the different positions shown in Figures 5 to 6, the center of gravity (see positions G i , G 2 , G 3 in Figure 7) of the body 8 of the user (shown schematically in phantom in Figure 7) s' deviates from a horizontal plane H, by a distance d sufficiently small that the forces required of the user's body to pass from one position to the other are acceptable and that the user does not have to get up seat to change the position of the seat.
  • the curve AB defined by the grooves 5 is determined empirically by defining the relative positions which the backrest 1 and the seat 2 must take so that the center of gravity G "G 2 , G 3 deviates from the horizontal plane H l d ' distance as small as possible.
  • clamping levers 9 fixed on the front legs 4 and accessible to the hand of the user, whatever the position of the latter on the chair.
  • These levers 9 can pivot at a certain angle by acting on a conventional clamping device (not shown) which prevents any movement of the grooves 5 relative to the fixed rollers 7.
  • This clamping device also blocks the link 4a which is connected to the lower edge 1a of the folder 1.
  • rollers 7 are advantageously constituted by ball bearings to reduce friction with respect to the grooves 5. These rollers 7 can be replaced by fingers coated with an anti-friction material such as polytetrafluoroethylene.
  • This chair includes a backrest 10, a seat 11 and four feet 12, 13. On each side of the chair, the upper parts of the front foot 12 and the rear foot 13 are joined by a flange 14 whose upper edge is shaped as an armrest 15 .
  • the lower end 10a of the backrest 10 is articulated to the seat 11, along an axis Z-Z '.
  • This axis Z-Z ' carries on its opposite ends rollers 16 engaged in fixed grooves 17, formed in the flanges 14 (See in particular Figures 10 and 11).
  • the rear face of the backrest 10 carries a hinge pin V-V ′, the ends of which are provided with rollers 18 engaged in fixed grooves 19, also provided in the flanges 14.
  • the seat 11 Opposite its rear end, the seat 11 carries a hinge pin WW 'carrying opposite rollers 20 engaged in corresponding grooves 21.
  • the grooves 17, 19 and 21 make it possible to guide the axes Z-Z', VV 'and WW' following portions of curve CD, EF, GH, which are determined so that the center of gravity of the user, in position on the chair, remains substantially in a horizontal plane for all the relative positions of the backrest 10 and seat 11.
  • FIGS. 12 to 17 These different positions are shown diagrammatically in FIGS. 12 to 17.
  • the articulation axis WW 'of the seat 11 and the articulation axis ZZ' of the latter with respect to the backrest 10 are situated substantially at the same distance, above the bearing surface of the seat 11. Furthermore, the hinge pin VV 'of the backrest 10 is located behind the bearing surface of the latter at a distance closer to its lower end 10a than to its edge higher 10b.
  • the guide grooves 17 and 21 comprise a first part 17a and 21a making it possible to guide the movement of the seat 11 between a substantially horizontal position (see FIG. 12) and a position inclined towards the rear, at an angle between 20 and 35 ° approximately (see Figures 13 and 14).
  • These guide grooves 17 and 21 comprise a second part 17b and 21b allowing the seat 11 to move upwards, from the above-mentioned position (that of FIG. 14) to the almost horizontal position (shown in Figure 16). '
  • the guide groove 19 of the articulation axis VV 'of the backrest 11 comprises a first part 19a making it possible to guide the inclination of the backrest 10 between an almost vertical position (FIG. 12) and a position inclined backwards according to a angle between 110 and 120 ° (see Figure 14) in which the axis of articulation ZZ 'of the backrest 10 with a seat 11 is located at the end of the first part 17a of the guide groove of this axis.
  • the guide groove 19 comprises a second part 19b which makes it possible to guide the inclination of the backrest-10 towards an almost horizontal position (see FIG. 16) in which the axis of articulation ZZ 'of the backrest 10 with the seat 11 is located at the end D of the guide groove 17 of the aforementioned axis.
  • the groove 19 for guiding the axis VV ′ of the articulation of the backrest 10 extends along an arcuate curve whose concavity is directed towards the end D of the guide groove 17 of the axis Z-Z '.
  • the guide groove 17 of the axis ZZ 'of the articulation of the backrest 10 to the seat 11 is substantially L-shaped.
  • One of the branches of this L which corresponds to the first part 17a of the groove 17 is directed forward and is slightly inclined downward.
  • the other branch which corresponds to the second part 17b is directed upwards with a slight inclination towards the front.
  • the guide groove 21 of the hinge pin WW 'of the seat 11 is oriented upwards, in a direction almost parallel to the part 17b of the groove 17 and ends in a corresponding arc directed towards the front. in its second part 21 b.
  • FIG. 17 the different positions of the backrest 10 and of the seat 11 have been shown.
  • the center of gravity M of its body moves over a very short distance e, in a horizontal plane H 2 .
  • FIG. 18 there is shown schematically a chair equipped with the same elements as that shown in Figures 12 to 17. These common elements are therefore assigned identical references.
  • This chair further comprises a headrest 22 articulated relative to the upper edge 10b of the backrest 10, along a horizontal axis U-U '.
  • the end 22a of the headrest 22 which extends beyond the axis UU 'towards the bottom of the backrest 10, comprises an axis TT' whose opposite ends carry rollers 23 engaged in fixed grooves 24 in the form of an arc formed in the side flanges of the chair.
  • each groove 24 is situated substantially in the plane of the backrest 10, in the fully raised position, this plane thus being substantially coincident with that of the headrest 22.
  • the opposite end J of the groove 24 is located below the plane of the backrest 10 in a nearly horizontal position, the angle a between the headrest 22 and the backrest 10 being significantly less than 180 °. In the intermediate positions, this angle gradually decreases from the most raised position of the backrest 10, where it is equal to 180 °.
  • This angle a is determined by the shape of the guide groove 24 of the axis T-T '.
  • the headrest 22 When the user modifies the inclination of the backrest 10, the headrest 22 gradually pivots forward, which has the effect, on the one hand, of raising the user's head relative to his body, this which gives the head a comfortable position in all situations. Furthermore, raising the head when the backrest is tilted contributes favorably to maintaining, in a fixed position, the center of gravity of the user's body.
  • the chair shown in Figure 18 includes a footrest 25 hinged relative to the front edge 11a of the seat 11, along a horizontal axis S-S '.
  • This footrest 25 is made integral with a hinge pin R-R ′ carrying rollers 26 engaged in fixed grooves 27.
  • each groove 27 is located substantially in the plane passing through the ends H and D of the grooves 17 and 21 and is located substantially equidistant from these ends H and D.
  • the other end L of the groove 27 is disposed under the front 11 a of the seat 11, when the latter is in an almost horizontal position. Due to the shape of the groove 27, the angle b between the seat 11 and the footrest 25 increases progressively between 30 and 180 ° approximately, when the chair is moved from the sitting position to the lying position.
  • the user's feet and legs occupy the most comfortable position in all positions of the chair.
  • the shape of the grooves 27 is determined so that the position of the feet and legs of the user contributes to keeping the center of gravity of the user's body in an immobile position.
  • the feet, legs, thighs, trunk and head of the user occupy in all situations, comfortable positions and such that the center of gravity of the whole body remains perfectly immobile. Therefore, the balance conditions are not likely to be disturbed by inappropriate positions of the legs or the head of the user, which would be likely to move the center of gravity of the body up or down , which would then require the user to exert a certain effort to compensate for this displacement of the center of gravity, before being able to modify the position of the chair.
  • the invention can be applied to any type of seat, comprising at least one backrest and one seat.
  • the invention is also applicable to a seat such as a bed base composed of n elements hinged together, along n + 1 parallel axes, each element being intended to serve as a support for an articulated part of the body of user, such as legs, thighs, trunk and head.
  • the axes of articulation of these elements could be mobile, along guide curves defined by grooves, ramps or cams, determined so that the center of gravity of the user's body, in position on these elements, remains substantially in a horizontal plane for all the relative positions of these elements.
  • the articulated elements of the seat according to the invention are in substantially indifferent equilibrium, provision could be made to motorize the movement of the aforementioned elements between their extreme positions of travel by means of a low power motor controlled by the user. Indeed, such an engine will only have to overcome reduced and substantially constant forces for all the relative positions of the articulated elements.
  • This motor could thus be powered for example by a single battery, which is particularly convenient especially in the case of a garden chair.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Sewing Machines And Sewing (AREA)
EP83901349A 1982-05-19 1983-04-27 Siege articule Expired EP0108760B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901349T ATE24383T1 (de) 1982-05-19 1983-04-27 Gelenkter sitz.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8208778A FR2527061B1 (fr) 1982-05-19 1982-05-19 Siege articule
FR8208778 1982-05-19

Publications (2)

Publication Number Publication Date
EP0108760A1 EP0108760A1 (fr) 1984-05-23
EP0108760B1 true EP0108760B1 (fr) 1986-12-30

Family

ID=9274201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901349A Expired EP0108760B1 (fr) 1982-05-19 1983-04-27 Siege articule

Country Status (14)

Country Link
US (1) US4547017A (da)
EP (1) EP0108760B1 (da)
JP (1) JPS59500849A (da)
AT (1) ATE24383T1 (da)
AU (1) AU550998B2 (da)
BR (1) BR8307365A (da)
DE (2) DE108760T1 (da)
DK (1) DK21984A (da)
FI (1) FI834739A0 (da)
FR (1) FR2527061B1 (da)
IT (1) IT1167148B (da)
NO (1) NO834685L (da)
OA (1) OA07603A (da)
WO (1) WO1983003957A1 (da)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3429186A1 (de) * 1984-08-08 1986-02-20 Uredat-Neuhoff, Angela, 4592 Lindern Sitzmoebel, insbesondere buerostuhl
FR2587888A1 (fr) * 1985-10-02 1987-04-03 Vriend Hendrik Armature pour chaises a deux positions
DE3800756A1 (de) * 1987-06-24 1989-01-05 Horst Sondergeld Sitz fuer einen buerostuhl od. dgl.
DE3800754A1 (de) * 1987-06-24 1989-01-05 Horst Sondergeld Sitz fuer einen buerostuhl od. dgl. mit einem insbesondere durch koerpergewichtsverlagerung verstellbaren sitz- und rueckenteil
JP2978244B2 (ja) * 1989-12-29 1999-11-15 ヴィルカーン ヴィルケニング ウント ハーネゲーエムベーハー ウント コンパニー 事務椅子のための同期位置調節装置
US5131717A (en) * 1990-09-28 1992-07-21 The Pelton & Crane Company Reclining chair having a movable seat back and a movable seat bottom
GB2275867A (en) * 1993-01-27 1994-09-14 Production Tools Seat recliner mechanism
CA2116079C (en) * 1993-02-22 2005-12-27 Benjamin Cowan Chair
DE19639741C2 (de) * 1996-09-06 1998-07-09 Thomas Jungjohann Sitzmöbelelement, insbesondere Polstermöbelelement, mit einer gekoppelten Rückenlehnen- und Sitzverstellung
JP2008502104A (ja) * 2004-06-03 2008-01-24 イマゴ サイエンティフィック インストルメンツ コーポレーション レーザ原子プロービング方法
EP1844653B1 (en) 2006-03-30 2017-07-26 GAT Microencapsulation GmbH Novel agrochemical formulations containing microcapsules
US7201445B1 (en) * 2006-05-26 2007-04-10 Optilife Products, Inc. Feeding seat
GB0708053D0 (en) 2007-04-26 2007-06-06 Leuven Adjustable furniture
GB0918685D0 (en) 2009-10-23 2009-12-09 Integrated Furniture Technolog Adjustable furniture
NZ598420A (en) * 2009-08-18 2014-02-28 Integrated Furniture Technologies Ltd Adjustable furniture
JP5650452B2 (ja) * 2010-07-15 2015-01-07 アップリカ・チルドレンズプロダクツ合同会社 チャイルドシートの座席構造
US10004334B2 (en) 2010-09-09 2018-06-26 Integrated Furniture Technologies Limited Lift-recliner chair
USD707995S1 (en) 2012-05-23 2014-07-01 Hni Technologies Inc. Chair
US9198514B2 (en) 2012-05-23 2015-12-01 Hni Technologies Inc. Chair with pivot function and method of making
GB201211027D0 (en) * 2012-06-21 2012-08-01 Fletcher Richard Lifting units
US8973996B2 (en) * 2013-01-16 2015-03-10 King Abdulaziz University Congregational prayer chair
GB2518394A (en) 2013-09-20 2015-03-25 Sherborne Upholstery Ltd Adjustable bed
US20170347797A1 (en) 2014-12-11 2017-12-07 Integrated Furniture Technologies Limited Adjustable furniture
GB201504140D0 (en) 2015-03-11 2015-04-22 Motus Mechanics Ltd Adjustable bed
GB201610212D0 (en) 2016-06-13 2016-07-27 Motus Mech Ltd Adjustable bed
US9713381B2 (en) * 2015-06-11 2017-07-25 Davis Furniture Industries, Inc. Chair
EP3476254B1 (de) 2017-10-25 2021-06-09 EB-invent GmbH Sitzmöbel, insbesondere bürostuhl
GB201813009D0 (en) 2018-08-09 2018-09-26 Eevolv Ltd A drive mechanism

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA599431A (en) * 1960-06-07 I. Winick Jack Reclining chairs
CH197538A (de) * 1937-02-02 1938-05-15 Anubis Ag Sitz- und Liegemöbel.
US2629425A (en) * 1946-06-18 1953-02-24 Boeing Co Berthable chair
US2633181A (en) * 1950-09-14 1953-03-31 Pearl B Beil Lounge chair
FR1124109A (fr) * 1955-03-02 1956-10-04 Perfectionnements aux sièges transformables en lits
FR1297900A (fr) * 1961-05-26 1962-07-06 Fauteuil de repos et de traitement médical et esthétique
FR1596508A (da) * 1968-07-18 1970-06-22
US4251107A (en) * 1978-03-20 1981-02-17 Sugatsune Industrial Co., Ltd. Collapsible reclining chair

Also Published As

Publication number Publication date
IT1167148B (it) 1987-05-13
AU550998B2 (en) 1986-04-10
AU1477183A (en) 1983-12-02
WO1983003957A1 (fr) 1983-11-24
DE108760T1 (de) 1984-08-30
DK21984D0 (da) 1984-01-18
US4547017A (en) 1985-10-15
DK21984A (da) 1984-01-18
FI834739L (fi) 1983-12-22
NO834685L (no) 1983-12-19
IT8348322A0 (it) 1983-05-18
EP0108760A1 (fr) 1984-05-23
DE3368501D1 (en) 1987-02-05
FR2527061B1 (fr) 1985-11-15
ATE24383T1 (de) 1987-01-15
JPS59500849A (ja) 1984-05-17
BR8307365A (pt) 1984-04-17
FR2527061A1 (fr) 1983-11-25
OA07603A (fr) 1985-03-31
FI834739A0 (fi) 1983-12-22

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