EP0485868A1 - Chaise, en particulier chaise d'office - Google Patents

Chaise, en particulier chaise d'office Download PDF

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Publication number
EP0485868A1
EP0485868A1 EP19910118861 EP91118861A EP0485868A1 EP 0485868 A1 EP0485868 A1 EP 0485868A1 EP 19910118861 EP19910118861 EP 19910118861 EP 91118861 A EP91118861 A EP 91118861A EP 0485868 A1 EP0485868 A1 EP 0485868A1
Authority
EP
European Patent Office
Prior art keywords
support
bevel gear
chair according
tubular body
operatively connected
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Withdrawn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
EP19910118861
Other languages
German (de)
English (en)
Inventor
Hermann Locher
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.)
Giroflex Entwicklungs AG
Original Assignee
Giroflex Entwicklungs AG
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 Giroflex Entwicklungs AG filed Critical Giroflex Entwicklungs AG
Publication of EP0485868A1 publication Critical patent/EP0485868A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A47C1/03279—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs of torsion type

Definitions

  • the invention relates to a chair, in particular to an office chair adjustable in height and inclination, consisting of a seat support, a backrest support, a pedestal with a first spring element, a support body arranged in a horizontal plane on the pedestal, a first and a second guide linkage and at least one second spring element which counteracts the pivoting back of the seat and backrest support.
  • EP-A 0 135 875 discloses a tilt mechanism for a seat device designed for the sprung pivoting movement, which comprises at least one spring element arranged in a cross tube and designed as a torsion bar, which in its central region is in a fixedly arranged central bearing and at both ends thereof is operatively connected to a rotatable outer bearing and is designed to automatically reset a pivoted component.
  • the object of the invention is to design a chair of the type mentioned in the introduction and to improve it in such a way that, while maintaining the ergonomic requirements dependent on the user, in particular during the pivoting movement, no transverse forces on the compensating the pivoting movement
  • the spring element is transmitted and, in addition, a preload setting which is dependent on the body weight can be carried out.
  • the two struts of the second guide linkage are arranged on the support body so as to be pivotable about a horizontal axis and are each operatively connected to a transmission mechanism which is appropriately arranged in the support body, and in that on the one hand the pivoting movement of the transmission mechanism Strive synchronously to the second spring element arranged at a distance from the axis of the supporting body and, on the other hand, can be transferred to the first spring element arranged in the stand column via a torsion bar connecting the two transmission mechanisms with one another and via a tensioning device that is operatively connected to the torsion bar.
  • FIG. 1 shows a schematic side view of a support frame section for a chair, designated 100 in its entirety, and the upper section of an approximately vertically oriented support column 10, a support body 25 arranged thereon, a first guide linkage 65 and a seat support 75 for one cannot be seen Seat body shown, a second guide linkage 70 and a backrest support 80 arranged thereon for a backrest, not shown.
  • a first spring element 20 Arranged in the standing column 10 is a first spring element 20, which is provided for the height adjustment of the seat support 75 and is preferably designed as a gas spring.
  • a second spring element 60 is arranged below the seat support 75 at a parallel distance from the support body 25.
  • the second spring element 60 which is also designed as a gas spring, is operatively connected via a correspondingly articulated lever 62 to a transmission mechanism (FIGS. 5, 6) arranged in the supporting body 25.
  • the mechanism which is operatively connected to the second guide linkage 70 and essentially transmits the inclination movement of the parts 75, 80 to the spring element 60 will be described in detail later in connection with FIGS. 5 and 6.
  • a base frame (not shown) designed as a so-called 5-star rotating lower part, by means of which the chair is either stationary or via correspondingly arranged rollers in a manner not shown is supported on the ground.
  • the first guide linkage 65 has two struts 66 and 66 'arranged at a distance from one another.
  • the two struts 66, 66 ' are each fastened at one end to the support body 25 in a manner not shown.
  • the other end of the struts 66, 66 ' is designed as an articulation point 1, 1'.
  • the articulation points 1, 1 ', each provided with a correspondingly configured bearing block 67, 67', are designed for mounting and fastening the seat support 75 on the knee side.
  • the second guide linkage 70 has two struts 71 and 71 'arranged at a distance from one another. One end of the two struts 71, 71 'is arranged and supported laterally on the support body 25. The other end of the struts 71, 71 'is each provided with an articulation point 3, 3' designed accordingly for mounting the backrest support 80.
  • the articulation point 3, 3 'furthermore has a holding part 4, 4' designed to receive and fasten the backrest support 80.
  • a further articulation point 2, 2' is arranged on each strut 71, 71 '.
  • the articulation points 2, 2 ' each provided with a correspondingly designed bearing block 72, 72', are likewise designed for mounting the seat support 75 and are arranged at a distance from the articulation point 1 and 1 '.
  • the second guide linkage 70 with the backrest support 80 arranged thereon, as shown in FIG. 1, can be pivoted in the direction of the arrow B 'under an appropriate load about an essentially horizontally oriented axis X of the support body 25.
  • the seat support 75 mounted on the articulation points 1, 1 'and 2.2' is simultaneously moved in the direction of the arrow A '(FIG. 1).
  • Fig.1 and 2 shows only one exemplary embodiment of a seat device, which essentially comprises the seat support 75, the backrest support 80 and the two correspondingly articulated guide rods 65 and 70.
  • the design of the seat device can, for example, also be designed as a shell body or the like and can additionally be provided with side armrests. It is essential, however, that the inclination of the seat support together with the backrest support can be adjusted synchronously and that, as shown schematically in FIG. 1, the pivot angle of the seat support 75, designated A, is in a specific relationship to the pivot angle of the backrest support 80, designated B .
  • the swivel angle ratio is chosen approximately 1: 2, the angle A in the order of magnitude between 10 ° to 15 ° and the angle B in the order of magnitude between 20 ° to 30 °.
  • FIG. 3 shows the support frame section 100 shown on a larger scale and in side view and one can see the upper section of the pedestal 10, the support body 25 arranged thereon, the first and second guide linkages 65 and 70, the seat support 75, the backrest support 80 and that spring element 60 arranged at a parallel distance from the supporting body 25.
  • the bearing block 67 is arranged on the seat support 75 in the front, knee-side region and is fastened to the underside 75 ′ of the seat support 75 by means not shown in detail, for example with a screw connection.
  • a bracket 68 is articulated on the bearing block 67 by means of a first pin 63, on which the strut 66 of the first guide rod 65 is articulated by means of a second pin 64.
  • the parts 67, 68 and 63, 64 together form the articulation point 1.
  • the other articulation point 1 'with the corresponding parts 67', 68 'and 63', 64 ' is designed analogously.
  • the two articulation points 1, 1 'arranged on the knee the correspondingly articulated tabs 68, 68 'serve, when the seat support 75 is loaded, as a necessary length compensation between the articulated points 1, 1' and 2, 2 'arranged at a distance from one another.
  • the bearing block 72 is arranged at a distance from the front bearing block 67 arranged on the knee side and is fastened by means not shown, for example with a screw connection.
  • a bolt 69 is arranged and supported in the bearing block 72, to which the strut 71 of the second guide linkage 70 is articulated.
  • the parts 72 and 69 together form the articulation point 2, the other articulation point 2 'having the corresponding parts 72' and 69 'being designed analogously.
  • FIG. 7 shows a sectional view of a section of the pedestal 10 and one can see an upper standpipe 14, the support body 25 arranged there with its tubular body 26 with the struts 66 and 71 and a torsion bar 45 arranged coaxially in the tubular body 26.
  • the standpipe 14 On the side opposite the tubular body 26, the standpipe 14 has a corresponding semicircular web 14 '.
  • a slide bush 15 is provided with a through hole 15 '.
  • two bolts 16, 16 ′ arranged opposite one another are provided and fastened in the wall of the sliding bush 15 in a manner not shown in detail.
  • the sliding bush 15 is operatively connected to the standpipe 14.
  • a push tube 13 is arranged, which is operatively connected to the spring element 20 arranged therein.
  • FIG. 4 shows a schematic, perspective view of the stand column, designated as a whole by 10, with the upper stand pipe 14 and a lower stand pipe 11.
  • the push pipe 13 which is preferably designed as a gas spring, is operatively connected arranged in the two stand pipes 11, 14, the push pipe 13, which is preferably designed as a gas spring, is operatively connected arranged.
  • the piston rod of the gas spring 20 is designated.
  • the support body 25 arranged in the upper area on the standpipe 14 with the torsion bar 45 arranged coaxially therein can be seen.
  • a tensioning device 50 shown schematically here, which essentially comprises two tensioning levers 54, 54 'which are arranged at a distance from one another and are operatively connected to the torsion bar 45.
  • 4 shows the relative movement of the upper standpipe 14 in relation to the lower standpipe 11 with arrow direction Y 'and Y'', with Y' representing the load movement oriented against the restoring force of the gas spring 20 and with Y '' the through movement the restoring force of the gas spring 20 reached relief movement is designated.
  • FIG. 5 shows a sectional view and FIG. 6 in a sectional top view a section of the support body designated in its entirety by 25 and one recognizes the tubular body 26 with the strut 71 arranged and supported at one end with the bearing block 72 and bolt 69 of the second Guide rod 70 and the strut 66 with the bearing block 67 and pin 63 of the first guide rod 65.
  • the strut 71 'or 66' is arranged (FIG. 2).
  • the tubular body 26 forms the substantially horizontally oriented axis X, about which the second guide linkage 70 formed from the two struts 71, 71 ', as shown in FIG. 1, can be pivoted in the direction of the arrow X'.
  • the two struts 71, 71 ' are operatively connected to the transmission mechanism 35, 35' (FIG. 2) arranged in the end region of the tubular body 26, only one transmission mechanism 35 being shown in FIG.
  • the transmission mechanism 35, 35' FIG. 2
  • the upper standpipe 14 of the support column 10 arranged in the middle of the support body 25 on the tubular body 26 and the tensioning device 50 arranged in the tubular body 26.
  • the two transmission mechanisms 35, 35 'and also arranged in the end region of the tubular body 26 the tensioning device 50 are operatively connected to one another via the correspondingly designed torsion bar 45 which penetrates the tubular body 26 in the axial direction.
  • the vertical column 10 essentially forms an axis of symmetry of the entire support body 25 with the vertical axis Y.
  • a transmission mechanism 35 arranged in the supporting body 25 is described below and in connection with FIG. 5 and FIG. 6:
  • a bearing or inner sleeve 27 is arranged, in which a socket-like coupling piece 28 is mounted coaxially.
  • the coupling piece 28 is provided with a recess 29 designed as a blind hole, in which a first bevel gear 36, which is provided with a correspondingly designed cylindrical section 37, is arranged and supported.
  • a second, cylindrical section 37 'of the bevel gear 36 is arranged and supported in the inner sleeve 27.
  • the bevel gear 36 is operatively connected to the coupling piece 28 in a rotationally fixed manner by means of a dowel pin 32 or the like penetrating the corresponding parts.
  • the coupling piece 28 has a wall 33 on the side facing the strut 71, which wall acts as a contact and fastening part for the flange piece 30 with a corresponding design provided strut 71 is used.
  • the flange piece 30 of the strut 71 is operatively connected to the coupling piece 28 by a screw 31.
  • the operative connection of the bottle piece 30 arranged on the strut 71 with the coupling piece 28 can also be achieved by other means, for example by means of a corresponding spur toothing.
  • the correspondingly designed flange piece 30 can also be formed on the strut 71, so that the parts 30, 71 form a unit.
  • a second bevel gear 38 is provided, the toothing, not shown, of which engages with the toothing of the first bevel gear 36.
  • the second bevel gear 38 is arranged and supported with a cylindrical section 39 in a holding element 40 provided with a corresponding recess 39 '.
  • the holding element 40 has two flanges 41, 41 ′ adapted according to the tubular body 26, by means of which the holding element 40 is fastened to the tubular body 26 by a screw connection, not shown.
  • the bevel gear 38 and the wall 42 of the holding element 40 are penetrated by a bolt 43 or the like.
  • the bolt 43 is connected, for example, to the bevel gear 38 in a rotationally fixed manner by means of a wedge connection or the like, not shown.
  • the bolt 43 forms an axis of rotation Z oriented orthogonally to the axis of rotation X of the tubular body 26 and of the first bevel gear 36, around which, with a corresponding pivoting of the guide linkage 70, the second bevel gear 38 which engages with the first bevel gear 36 and the bolt 43 connected thereto Arrow direction Z 'is rotated.
  • a correspondingly designed pivot lever 62 is arranged and fastened in a manner not shown.
  • the parts 38, 40, 43 and 62 form a structural unit which can be inserted into the tubular body 26 through a recess 26 'which is provided and appropriately formed in the tubular body 26, so that the two bevel gears 36 and 38 are in engagement with one another.
  • the second transmission mechanism 35 ' which is operatively connected to the strut 71' and is arranged in the tubular body 26, is arranged at the other end of the support body 25, which is not shown in more detail in FIGS. 5 and 6 , which is designed analogously to the transmission mechanism 35 and comprises the individual elements arranged accordingly and acting on the spring element 60.
  • the tensioning device 50 which is further arranged in the support body 25 and is operatively connected to the elements correspondingly arranged in the support column 10, is described below: As shown in FIGS. 5 and 6, two centering pieces 51, 51 'arranged at a distance from one another are arranged in the tubular body 26, each of which is provided with a correspondingly designed bore 52, 52'. Arranged between the two centering pieces 51, 51 'is a clamping element, designated as a whole by 55, which has a hub piece 53 with a bore 53' arranged between the two centering pieces 51, 51 '.
  • the two clamping levers 54, 54 ′ which are arranged at a distance from one another and are designed in the manner of a boom, are arranged on the hub piece 53.
  • the two clamping levers 54 and 54 'of the clamping element 55 penetrate in the radial direction the tubular body 26 provided with the appropriately designed recess 24 and are supported on the two bolts 16, 16' of the sliding bush 15.
  • 5 and 6 also show the torsion bar 45 which penetrates the parts 51, 51 'and 53 of the tensioning device 50 in the axial direction and with one end in the bevel gear 36 of the one transmission mechanism 35 and with the other End in the not shown bevel gear 36 'of the other transmission mechanism 35' is arranged.
  • the torsion bar 45 is preferably polygonal in profile cross section and the bevel gears 36, 36 'and the hub piece 53 are each provided with a recess (not designated) designed in accordance with the torsion bar profile cross section, so that the two bevel gear wheels 36, 36' and the hub piece 53 are provided Clamping device 50 are operatively connected to one another.
  • the parallel arrangement of the gas spring 20 to the horizontally oriented support body 25 ensures space-saving accommodation and a largely rectilinear initiation of the movements. Due to the straightforward initiation of the movements, the piston seals in the gas spring are loaded much less and more cheaply and thus achieve a significantly longer life and function.
EP19910118861 1990-11-14 1991-11-06 Chaise, en particulier chaise d'office Withdrawn EP0485868A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3620/90 1990-11-14
CH362090 1990-11-14

Publications (1)

Publication Number Publication Date
EP0485868A1 true EP0485868A1 (fr) 1992-05-20

Family

ID=4259898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910118861 Withdrawn EP0485868A1 (fr) 1990-11-14 1991-11-06 Chaise, en particulier chaise d'office

Country Status (3)

Country Link
US (1) US5209548A (fr)
EP (1) EP0485868A1 (fr)
JP (1) JPH053818A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582818A1 (fr) * 1992-07-16 1994-02-16 Giroflex-Entwicklungs AG Chaise, notamment chaise de bureau
CH696379A5 (de) 2002-10-15 2007-05-31 Stoll Giroflex Ag Sitzmöbel.
EP2050360A1 (fr) * 2007-10-16 2009-04-22 Provenda Marketing AG Siége avec mechanisme d'amortissement.
CN102151021A (zh) * 2010-03-27 2011-08-17 卢顺接 靠背可前后移动的椅子

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1270377B (it) * 1993-05-27 1997-05-05 Pro Cord Srl Sedia con schienale oscillante
DE4409098A1 (de) * 1994-03-17 1995-09-21 Froescher Gmbh & Co Kg Stuhl mit Neigungsmechanik
US6086153A (en) * 1997-10-24 2000-07-11 Steelcase Inc. Chair with reclineable back and adjustable energy mechanism
US6007150A (en) 1998-03-08 1999-12-28 Milsco Manufacturing Company Motorcycle seat with adjustable backrest
NO982788L (no) * 1998-06-17 1999-12-20 Ring Mekanikk As Stolbeslag
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair
NO317791B1 (no) * 2002-01-04 2004-12-13 Stokke As Bevegelig ledd
US7500718B2 (en) * 2004-05-14 2009-03-10 Haworth, Inc. Tilt tension mechanism for chair
US7325873B2 (en) * 2004-06-12 2008-02-05 Steelcase Inc. Seating unit
ITMI20050751A1 (it) * 2005-04-27 2006-10-28 Donati Spa Meccanismo di regolazione dell'inclinazione di schienali in sedie e polteone specialmente da ufficio
EP1947007B1 (fr) * 2007-01-16 2013-01-16 Recaro Aircraft Seating GmbH & Co. KG Dispositif de siège, notamment de véhicule ou d'aéronef
US20130001994A1 (en) * 2011-06-30 2013-01-03 Yao-Chuan Wu Chair with a Resilient Back
USD697726S1 (en) * 2012-09-20 2014-01-21 Steelcase Inc. Chair
US9713381B2 (en) 2015-06-11 2017-07-25 Davis Furniture Industries, Inc. Chair
DE102015111946A1 (de) * 2015-07-22 2017-01-26 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
US11197548B2 (en) * 2019-12-16 2021-12-14 Allseating Corporation Reclining control system for a chair

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322450A1 (de) * 1983-06-22 1985-01-10 August Fröscher GmbH & Co KG, 7141 Steinheim Vorrichtung zum verstellen des sitzes und der rueckenlehne von stuehlen
DE8806835U1 (fr) * 1988-05-19 1988-09-08 Roeder Gmbh, 6000 Frankfurt, De
DE3719784A1 (de) * 1987-06-13 1988-12-22 Roeder Soehne Sitzmoebelfab Sitzmoebel

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US3386770A (en) * 1967-09-18 1968-06-04 Stewart Warner Corp Double action chair control
DE3335148A1 (de) * 1983-09-28 1985-04-11 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder Vorrichtung zur gefederten schwenkbewegung eines bauteiles
US4652050A (en) * 1984-01-11 1987-03-24 Herman Miller, Inc. Chair tilt mechanism
GB2159400A (en) * 1985-05-10 1985-12-04 Syba Ltd Spring-tilt mechanism for a chair or seat
DE3619928A1 (de) * 1986-06-13 1987-12-17 Hartmut S Engel Funktions-sitzmoebel
US4840426A (en) * 1987-09-30 1989-06-20 Davis Furniture Industries, Inc. Office chair
DE3741472A1 (de) * 1987-12-08 1989-06-22 Simon Desanta Stuhl
US4979778A (en) * 1989-01-17 1990-12-25 Brayton International, Inc. Synchrotilt chair

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322450A1 (de) * 1983-06-22 1985-01-10 August Fröscher GmbH & Co KG, 7141 Steinheim Vorrichtung zum verstellen des sitzes und der rueckenlehne von stuehlen
DE3719784A1 (de) * 1987-06-13 1988-12-22 Roeder Soehne Sitzmoebelfab Sitzmoebel
DE8806835U1 (fr) * 1988-05-19 1988-09-08 Roeder Gmbh, 6000 Frankfurt, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0582818A1 (fr) * 1992-07-16 1994-02-16 Giroflex-Entwicklungs AG Chaise, notamment chaise de bureau
CH696379A5 (de) 2002-10-15 2007-05-31 Stoll Giroflex Ag Sitzmöbel.
EP2050360A1 (fr) * 2007-10-16 2009-04-22 Provenda Marketing AG Siége avec mechanisme d'amortissement.
CN102151021A (zh) * 2010-03-27 2011-08-17 卢顺接 靠背可前后移动的椅子
EP2368460A1 (fr) * 2010-03-27 2011-09-28 Shunjie Lu Chaise avec dossier à déplacement de va-et-vient

Also Published As

Publication number Publication date
JPH053818A (ja) 1993-01-14
US5209548A (en) 1993-05-11

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