EP1570767A1 - Régulateur de poids pour une chaise - Google Patents

Régulateur de poids pour une chaise Download PDF

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Publication number
EP1570767A1
EP1570767A1 EP05388015A EP05388015A EP1570767A1 EP 1570767 A1 EP1570767 A1 EP 1570767A1 EP 05388015 A EP05388015 A EP 05388015A EP 05388015 A EP05388015 A EP 05388015A EP 1570767 A1 EP1570767 A1 EP 1570767A1
Authority
EP
European Patent Office
Prior art keywords
base frame
adjustment
adjustment means
chair
weight regulator
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Withdrawn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
EP05388015A
Other languages
German (de)
English (en)
Inventor
Esben Skov Nielsen
Lars Ole Raerup
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.)
RBM AS
Original Assignee
RBM AS
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
Priority claimed from DK200401521A external-priority patent/DK200401521A/da
Application filed by RBM AS filed Critical RBM AS
Publication of EP1570767A1 publication Critical patent/EP1570767A1/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Withdrawn legal-status Critical Current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
    • A47C1/03205—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
    • 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 or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/446—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with fluid springs
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks

Definitions

  • the invention relates to a method of regulating the weight of a chair comprising a base frame to support a seat face as well as a spring system having adjustment means for adjusting the resilience of a weight regulator in dependence on the user's weight.
  • the invention also relates to a weight regulator for a chair comprising a base frame to support a seat face as well as a spring system having adjustment means for adjusting the resilience of the weight regulator in dependence on the user's weight.
  • Such a chair is known e.g. from US 5 397 165, where the weight regulator comprises a spring system which permits the user to tighten or relax the spring tension by means of a screw device and thereby to adjust the tilt function of the weight regulator, that is the resilience of the chair to the user's weight.
  • the weight regulator comprises a spring system which permits the user to tighten or relax the spring tension by means of a screw device and thereby to adjust the tilt function of the weight regulator, that is the resilience of the chair to the user's weight.
  • the weight regulator and thereby the resilience of the chair cannot be adjusted in relation to the user's weight.
  • a very light person will not have the same benefit from the weight regulator of the chair as a heavier person, just as it is not possible to satisfy the individual ergonomic wishes which the user might have in respect of a such a weight regulating chair.
  • the resistance of the screw device increases in proportion to the tension of the spring, which frequently means that the user has to get up from the chair when the spring is to be tightened. Therefore, the user must alternatively sit and stand until the resilience of the chair correct for the user has been set, which is time-consuming per se.
  • the invention is intended to provide a weight regulator where the user's weight on the backrest of the chair means that the resilience individually satisfies the user's ergonomic wishes irrespective of the user's weight and various working postures.
  • the weight regulator will thus be instrumental in allowing the chair to be adjusted easily and without the use of tools, whereby the user will be motivated to adjust the chair correctly.
  • the maximum comfort of the chair can be utilized each time.
  • the adjustment described in claim 2 ensures that the resilience of the weight regulator may be adjusted very accurately in a simple and easy manner, such that it is adapted to the instantaneous user who uses the chair.
  • the weight regulator comprises primary adjustment means for a coarse adjustment and secondary adjustment means for a fine adjustment of the resilience of the backrest and partially the seat by tilting/movement, said adjustment means operating between a lower bearing point and a base frame, and that the adjustment means are unloaded at the moment of adjustment.
  • Claims 3 to 5 provide an easy way of performing a very accurate adjustment of the resilience of the weight regulator according to the user who is to use the chair.
  • the invention as described in claims 6 to 8, provides a releasable retention of the end part of the adjustment means in a given position relative to the base frame, so that the position suitable for the user may be maintained.
  • Claim 9 describes means of adjusting the sitting length of the seat, which is important inter alia for the support of the user's thighs.
  • Claim 10 describes an embodiment of the base frame with the option of arranging a backrest which moves together with the base frame.
  • Figures 1 and 2 show a preferred embodiment of a weight regulator 1 according to the invention for a chair, said weight regulator 1 essentially consisting of a base frame 2 and a spring system 3 mounted on the base frame 2.
  • the base frame 2 is configured as a circular ring having an essentially circular cross-section, but another configuration and/or cross-section is possible.
  • the base frame 2 is enclosed by the shortest one end member of an essentially rectangular bracket 4, whose other end member is oriented inwards toward the interior of the base frame 2.
  • the bracket 4 comprises a through recess 6 on its upper face 5.
  • the recess 6 is arranged centrally on the upper face 5 measured between the two side faces 9, 9 of the bracket and extends from the other end member of the bracket 4, which is oriented toward the interior of the base frame 2, toward, but not to, the centre of the bracket 4, measured between the one end member and the other end member, respectively.
  • Two bores 11 for securing the backrest of the chair (not shown in the drawing) are arranged symmetrically on both sides of and at a certain distance from the intersection of the centre line C with the base frame 2.
  • the number of bores 11 is not limited to two and may thus be one or more. If the number of bores 11 is one, it will preferably be positioned centrally relative to the centre line C or in the immediate vicinity thereof.
  • a plurality of depressions 12 are provided in the lower and inner periphery of the base frame 1 on the side of each bore 11 which forms the shortest circular arc to the bracket 4.
  • the depressions 12 are positioned with a mutual spacing, and, as will appear from figure 2, the depressions 12 substantially extend in a circular arc to an angle which corresponds to essentially 90° relative to the centre axis C.
  • the spacing between the depressions 12 may be the same and/or different on the same side as well as on each side of the centre axis C. The function of the depressions 12 will be described more fully below.
  • a plate 13 is positioned in extension of the recess 6 of the bracket, said plate having a rubber block 7, on which the seat face rests, at the end most remote from the recess 6 itself.
  • a recess 8 is provided in each of the side faces 9 of the bracket, and a bearing 14 is provided in each recess 8, where a part of each bearing 14 covers the base frame 2.
  • a plate 15 engaging the recess 8 is provided in extension of each bearing 14. Owing to the recesses 8, the bracket 4 is capable of sliding to and fro, which allows the depth of the seat face to be adjusted to the individual user's build. Thus, when the seat face rests on the rubber block 7, the depth of the seat face will be maintained in its adjusted position because of the user's weight and the friction between the seat face and the rubber block 7 created thereby.
  • the recesses 8 are provided as two separate recesses 8. This is just to be considered as a single exemplary embodiment, as the recesses 8 may very well be replaced by a single throughgoing recess. Nor is the shape of the recesses 8 of importance; it is just important that the depth of the seat face may be adjusted.
  • an opening 17 is arranged on the lower face 16 of the bracket 4 for the carrying column (not shown in the drawing) of the chair. It will be seen from figure 4 that the opening 17 is arranged such that the centre line of the opening 17 essentially intersects the transverse centre line of the bearing 14. Thus, a “common point” will be provided from where the bracket 4 may move relative to the base frame 2. This "common point”, however, is not a structural requirement, but will result in a compact structure which does not take up unnecessary space.
  • a U-shaped strap 18 is mounted on the lower face 16 of the bracket 4, said strap extending from one recess 8 down below the bracket 4 to the other recess 8.
  • a rotatable bearing 19, to which two legs 20 in the form of gas dampers are secured, is mounted in the lower point of symmetry S of the U-shaped strap. Mechanical springs, gas springs, rubber or another resilient material, however, may also be used.
  • a ball head 21 enclosing the base frame 2 is mounted at the other end of the legs 20.
  • Each of the ball heads 21 comprises a pawl or the like (not shown in the drawing) for engagement with respective depressions 12 of the base frame 2 on each side of the bores 11 to the front edge of the seat face.
  • the engagement of the ball heads 21 with the depressions 12 may be regulated/adjusted by means of incorporated pressure devices or by simple spring action via a pawl, ball or the like (not shown in the drawing).
  • the ball heads 21 may have other shapes, but the rounded shape is most expedient, as, thus, there will no sharp corners or edges.
  • the ball heads 21 with associated legs 20 will be called a spring system 3 below, which is thus characterized in that one end may be moved in a circular arc, while the other forms a centre.
  • the spring system 3 consists of two essentially stepless adjustment options for the resilience, viz. a coarse adjustment and a fine adjustment.
  • a coarse adjustment a fine adjustment.
  • the spring system 3 will take on a different resistance owing to its circular movement, and with reference to figure 2, the spring system 3 will take on a maximum resistance in the outer position A and drop to a minimum in the other outer position B in step with the increase or reduction of the moment arm on the legs 20, which applies to both adjustment options.
  • the coarse and fine adjustments may be performed from the side desired by the user, as the coarse adjustment is performed by the ball head 21 which is adjusted first, whereby the other ball head 21 is thus used for the optional subsequent fine adjustment.
  • the resistance in the outer positions A and B may be selected in relation to the use of the spring system 3, that it is the field of use of the chair.
  • the resistance in the outer positions A and B are adapted to the use of the chair as an office chair, that is on the basis of a personal weight in the range of about 50 - 120 kg.
  • the spring system 3 at one end may move in a circular arc with a varying resistance, while the other end forms a centre, whereby the chair may be adjusted to the resilience which the individual user might wish.
  • the spring system 3 consists of ball heads 21 with associated legs 20, where the ball heads 21 with a pawl or the like enclose the base frame 2 and thus perform either the coarse adjustment or the fine adjustment (resilience).
  • the very structure of the mechanism performing the coarse and fine adjustments in this exemplary embodiment ball heads 21 with a pawl for engagement with the depressions 12 of the base frame 2, shall not be considered as a limited embodiment, as other configurations of the mechanism are possible.
  • the base frame 2 may be made without depressions 12, where e.g. the pawl in each ball head 21 is replaced by a spring device (not shown in the drawing) which is capable of applying the necessary pressure to the base frame 2 at coarse and fine adjustments.
  • the base frame 2 of the chair and thereby the seat face (not shown in the drawing) will assume an essentially horizontal position in the unloaded state of the chair, that is when the chair is not affected by any weight. This is illustrated in figures 1-4.
  • the base frame 2 When a user sits on the chair, the base frame 2 will be subjected to a weight load, as the user affects the backrest, which will cause compression of the spring system 3 and the base frame 2, and the seat face will likewise assume a less rearward inclination.
  • the exact inclination of the base frame 2 or the seat face will depend solely on the user's weight.
  • the weight impact will be stronger on the front of the base frame 2 and the base frame 2, because the load on the backrest is reduced, and thereby the backrest and partly the seat face will follow the user and the inclination will be smaller.
  • the user adjusts it by coarse and fine adjustments of the ball heads 21. Based on the stated neutral position of the ball heads 21, the resilience may thus be adjusted by changing the positions of the ball heads 21 toward the outer positions A and B. If less resilience is desired, the one ball head 21 is coarsely adjusted toward the outer position A, and if a corresponding greater resilience is desired, a coarse adjustment toward the outer position B is performed.
  • a fine adjustment may be performed with the other ball head 21, if the desired resilience is present between two points on the coarse adjustment.
  • the fine adjustment is performed according to the same principle as the coarse adjustment, that is the other ball head 21 is rotated toward either the outer position A or B.
  • the adjusted resilience of the chair will be maintained when a given user gets up from the chair, just as the base frame 2 of the chair with backrest will return to the neutral starting position.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
EP05388015A 2004-03-01 2005-02-28 Régulateur de poids pour une chaise Withdrawn EP1570767A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK200400337 2004-03-01
DKPA200400337 2004-03-01
DK200401521A DK200401521A (da) 2004-10-05 2004-10-05 Vægtregulering til en stol
DK200401521 2004-10-05

Publications (1)

Publication Number Publication Date
EP1570767A1 true EP1570767A1 (fr) 2005-09-07

Family

ID=34751437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05388015A Withdrawn EP1570767A1 (fr) 2004-03-01 2005-02-28 Régulateur de poids pour une chaise

Country Status (1)

Country Link
EP (1) EP1570767A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026787A1 (de) * 2010-07-09 2012-01-12 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4231057A1 (de) 1992-09-17 1994-03-24 Mauser Waldeck Ag Sitzmöbel mit neigungsverstellbarer Sitzfläche und Rückenlehne
NL9300381A (nl) * 1993-03-02 1994-10-03 Bma Ergonomics B V Inrichting voor het instellen van de helling van een vlak, bijvoorbeeld het zitvlak van een stoel, en een stoel voorzien van deze inrichting.
US5397165A (en) 1992-10-20 1995-03-14 Paltechnica Nitzanim Synchronous movement adjustable seat support
EP0672370A1 (fr) * 1994-03-15 1995-09-20 Backquality Europe Chaise pourvue d'un mécanisme d'articulation assisté
US5584533A (en) * 1993-04-14 1996-12-17 Mauser Waldeck Ag Chair with variable inclination of the seat and backrest
WO2001071527A2 (fr) * 2000-03-23 2001-09-27 Cke Technologies Inc. Chaise ergonomique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4231057A1 (de) 1992-09-17 1994-03-24 Mauser Waldeck Ag Sitzmöbel mit neigungsverstellbarer Sitzfläche und Rückenlehne
US5397165A (en) 1992-10-20 1995-03-14 Paltechnica Nitzanim Synchronous movement adjustable seat support
NL9300381A (nl) * 1993-03-02 1994-10-03 Bma Ergonomics B V Inrichting voor het instellen van de helling van een vlak, bijvoorbeeld het zitvlak van een stoel, en een stoel voorzien van deze inrichting.
US5584533A (en) * 1993-04-14 1996-12-17 Mauser Waldeck Ag Chair with variable inclination of the seat and backrest
EP0672370A1 (fr) * 1994-03-15 1995-09-20 Backquality Europe Chaise pourvue d'un mécanisme d'articulation assisté
WO2001071527A2 (fr) * 2000-03-23 2001-09-27 Cke Technologies Inc. Chaise ergonomique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026787A1 (de) * 2010-07-09 2012-01-12 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
DE102010026787B4 (de) 2010-07-09 2023-01-12 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl

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