EP0584152A1 - Chaise - Google Patents

Chaise

Info

Publication number
EP0584152A1
EP0584152A1 EP92910054A EP92910054A EP0584152A1 EP 0584152 A1 EP0584152 A1 EP 0584152A1 EP 92910054 A EP92910054 A EP 92910054A EP 92910054 A EP92910054 A EP 92910054A EP 0584152 A1 EP0584152 A1 EP 0584152A1
Authority
EP
European Patent Office
Prior art keywords
backrest
chair
seat
previous
forward movement
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Withdrawn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
EP92910054A
Other languages
German (de)
English (en)
Other versions
EP0584152A4 (en
Inventor
Earl Owen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0584152A1 publication Critical patent/EP0584152A1/fr
Publication of EP0584152A4 publication Critical patent/EP0584152A4/en
Withdrawn legal-status Critical Current

Links

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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts

Definitions

  • the present invention relates to an improved chair, particularly but not exclusively for musicians.
  • the chairs of the present invention also provide growing children a chair which they can use through to maturity.
  • a chair comprising at least one leg depending from a seat, a backrest mounted on a support and a backrest adjustment mechanism, said chair being characterised by said backrest adjustment mechanism being adjustable from a first position to a second position tc control the depth of said seat, said backrest adjustment mechanism being releasably prevented from backward movement, with forward movement being performed by a single force.
  • a backrest adjustment mechanism which is adjustable from a first position to a second position, said backrest mechanism being releasably prevented from backward movement, with forward movement being performed by a single force.
  • each of said legs are separately extendable, whilst the backrest is mounted upon a backrest bracket which includes a ratchet mechanism to control the forward movement.
  • the forward movement occurs in discrete increments. It is also preferable that the dimensions of the backrest are such that the width is relatively smaller when compared to conventional backrests.
  • the backrest is preferably able to rotate around at least one axis.
  • the backrest is preferably shaped so as to be concave forward whilst being vertically convex forward to fit comfortably and supportively into the natural contour of the lower spine.
  • Figure 1 is a perspective view of a chair according to the invention
  • Figure 2A and 2B are side views showing two positions of the lumbar bracket
  • Figure 3 is a schematic view from below of the adjustment mechanism according to this embodiment.
  • Figure 4 is a sectional view of a leg extension device; and Figure 5 is a side view of another adjustment mechanism of the backrest forward-backward mechanism.
  • a chair 10 embodying the invention has a seat portion 30 of a relatively large area.
  • the upholstery is of reasonably firm resilience without being too deep.
  • the relatively large seat area 30, comfortably accommodates of persons of larger girth.
  • the downward curve on the front 31 of the seat is also noted.
  • the relative slope of the chair 10 is illustrated. It is possible within the scope of the invention for the chair to slope backwards or be level or tilt forward, however, it is sometimes preferred that a forward slope be provided where use is to be by musicians. This is most conveniently and securely provided by shortening the front legs 21, and 22. This aspect is more apparent from figures 2A and 2B. Most preferably, the slope is between 1 in 20 and 3 in 20, when unextendable legs are utilised.
  • the height of the chair is also of significance where extendable legs are not used.
  • a seated height of between say 38 cm and 54 cm at the front enables comfortable seating for virtually all users, utilising the depth adjusting mechanism described below.
  • a backrest 40 is secured by bracket 42.
  • the backrest 40 includes vertical adjustment means 41 , preferably a screw type adjustment mechanism cooperating with the bracket and a passage provided in the bracket. A user can thereby adjust the backrest height as is most comfortable.
  • the backrest 40 is of a relatively small size when compared to conventional backrests. Musicians of various kinds, for instance violinists, need to be able to move their arms without striking the back of the chair.
  • the backrest 4C of the present invention enables this, while still providing effective support.
  • Preferred dimensions of the backrest are between say 28 and 34 cm wide and between say 14 and 26 cm high.
  • the adjustment mechanism 41 does not hold the backrest 40, rigid, but allows limited rotational movement around an axis indicated as arrow 2 of figure 1 , so as to maximise user comfort.
  • the back rest 40 is able to accommodate some rotation 5 around arrow 1 by means of the softness of the cushion material used in the backrest 40.
  • the backrest 40 is held by a pivot pin (not shown) and biased by a spring (not shown) towards a backward-leaning position ie. the top of the backrest 40 is rearward of the bottom.
  • the backrest 40 thus moves when a user is seating himself to conform to the appropriate position when seated. 1 0
  • FIGS 2A and 2B the effect of relative movement (in the direction of arrows 3 of figure 1 ) between the seat 30 and bracket 42 is illustrated.
  • seat depth i.e. the distance between the front 31 of the seat 30 and the backrest 40. This will accommodate a tall person, or a shorter person who wishes to lean back a great " deal. Sliding the bracket 42 inwardly reduces the
  • a particular feature of the present invention is the large extent of travel possible for the backrest 40, and hence large range of effective seat depths provided. This enables appropriate seating for persons of a variety of heights, and a variety of required seating positions.
  • bracket 42 is such that the backrest 40 considerably overhangs the seat 30 in the figure 2A position. This ensures that a user's back contacts only the backrest 40 and not, for instance, the middle of the bracket 42. When the backrest 40 traverses in a forward or backward direction, the backrest does not change its orientation relative to the seat 30.
  • Bracket 42 includes a toothed region
  • a substantially U-shaped member 46 open at either end but of small depth to prevent wobble at the bracket 42, receives the toothed end 44 of the bracket 42.
  • An opening 49 receives a lever 45, having a handle surface at one end and a surface for engaging the teeth 52 of toothed region 44.
  • the engaging end is tapered on the edge facing rearward and relatively fiat on the edge acing forward.
  • the chairs for an orchestra are generally set up in the fully out position of figure 2B, a musician is then seated and slides the bracket in to reach the desired position using only one hand for the simple movement.
  • the bracket is held firmly by the teeth 42 cooperating with the flat surface of lever 45.
  • the lever is biased by bias spring 47 secured by projection 48 of member 46. It will be apparent that any other bias arrangement which is mechanically equivalent may be employed within the scope of the invention, including pivoting the lever 45 and relying on gravity to drop the stop 49A into the opening 49. 1 5
  • the lever be on the right side, to suit the majority of users.
  • the lever preferably protrudes beyond the seat for easy access.
  • leg extension mechanism 70 Illustrated in figure 4 is a leg extension mechanism 70.
  • the extension mechanism 70 can be located in the front and/or rear tubular legs 21 , 23 and consists of 20 an inner tube 71 which closely fits the internal diameter of legs 21 , 23. Where inner leg portion 71 engages the ground a suitable leg termination can be placed such as a plastic or rubber stop.
  • the inner leg 71 has located therein a spring which biases a stc * member 73 in a radially outward direction.
  • the spring 72 is of a leaf type construetion however any suitable biasing member can be utilised.
  • 25 73 has a dome or taper shaped top and substantially straight sides.
  • the legs 21 , 23 have a series of apertures 74 whilst inner leg 71 has a single aperture 75 through which stop 73 protrudes.
  • the hole 75 and hole 74 on the inner and outer legs respectively engage the sides stop 73 a: right angles. In operation one simply forces the stop 73 inwardly allowing the inner leg 0 to be moved relative to the outer leg.
  • legs which are individually height adjustable ensures that, particularly for musicians, the angle of tilt is as desired, either forward or backward depending upon the musician e.g. cellist. violinist.etc. Also, some musicians prefer to sit on sides of chairs rather than the front 5 and because each leg is individually extendable any angle or orientation can be achieved by the user.
  • FIG 5 An alternative ratchet arrangement is illustrated in figure 5. This differs from the apparatus of figure 3 in that a series of holes 81 are located in a plate which is bolted under the seat of the apparatus of figure 1.
  • the holes 81 in plate 82 are positioned in a lower most arrangement for the purpose of hiding the working components of the ratchet mechanism 80.
  • the plate 82 can be fabricated from a U shaped channel which is subsequently bolted to the seat 30 or may even be a flat sheet which is bolted to the under portions of the seat 30 by means of space. Sufficient clearance must be provided for backrest bracket 83 and the rest of mechanism 80.
  • the mechanism 80 comprises a lever portion 84 having stop means
  • the stop 85 has an angled face and substantially perpendicular face 88 which engages the rearward side of holes 81.
  • the bracket 83 is of a bar type skeletal construction with lever 84 being suspended between two such bars so that the lever 84 is in the middle of the bracket 83.
  • the backrest of the present invention is shaped so as to be slightly convex anteriorly. They are further shaped so as to be horizontally concave forwards, whilst vertically convex forwards.
  • Lumbar support can be added to the backrest. This is done by the use of thick outside soft paddling preferably soft density polyethylene foam, with the lumbar support being formed from a half tear drop shaped (in cross section)roll of thicker denser foam being located inside the soft padding approximately 2/3 of the way down the backrest, and positioned right across the backrest horizontally and within the contours of the backrest padding.
  • the chair may be constructed of any suitable material.
  • One embodiment employs tubular steel for the frame, steel for the bracket and ratchet, resilient foam for the upholstery, with a woven fabric covering.
  • Alternative materials may be employed, for instance plastic materials for the ratchet to reduce the level of noise produced thereby, and modern plastics for almost all components.
  • the des ⁇ ibed ratchet arrangements provide a secure, easily operable function with a minimum of effort namely a single force being required, which and is easier to use and more positive in action than alternative mechanisms. It is noted that the chair is shown with stationary configuration, as would normally be most stable, but a version with castors or wheels may be easily provided.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

Chaise (10) comprenant au moins un pied (21, 23) solidaire d'un siège (30), un dossier (40) monté sur un support (41) et un mécanisme de réglage du dossier (45, 80). Ladite chaise (10) se caractérise par le fait que le mécanisme de réglage du dossier (45, 80) autorise un réglage entre une première et une seconde position qui détermine la profondeur dudit siège (30), ce mécanisme de réglage du dossier (45, 80) empêche cet élément de se désolidariser de l'ensemble par un mouvement vers l'arrière, tandis que le déplacement vers l'avant s'effectue sous l'effet d'une seule et unique force.
EP9292910054A 1991-05-08 1992-05-08 A chair Withdrawn EP0584152A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK604691 1991-05-08
AUPK6046/91 1991-05-08

Publications (2)

Publication Number Publication Date
EP0584152A1 true EP0584152A1 (fr) 1994-03-02
EP0584152A4 EP0584152A4 (en) 1994-08-17

Family

ID=3775389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP9292910054A Withdrawn EP0584152A4 (en) 1991-05-08 1992-05-08 A chair

Country Status (2)

Country Link
EP (1) EP0584152A4 (fr)
WO (1) WO1992019132A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511852A (en) * 1993-02-25 1996-04-30 Herman Miller, Inc. Adjustable backrest for a chair
US5765914A (en) 1995-06-07 1998-06-16 Herman Miller, Inc. Chair with a tilt control mechanism
DE29822974U1 (de) 1998-12-28 1999-04-08 SIFA Sitzfabrik GmbH, 92237 Sulzbach-Rosenberg Anschluß für einen Rückenlehnenträger
DE10142081A1 (de) * 2001-08-30 2003-03-20 Pius Ponticelli Stuhl

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE824100C (de) * 1944-08-02 1951-12-10 Tan Sad Chair Company 1931 Ltd Schwenklagerung fuer die Rueckenlehne eines Stuhles oder Sessels
US2917104A (en) * 1957-04-18 1959-12-15 Martin Richtel Adjustable chair
GB1346420A (en) * 1971-09-27 1974-02-13 Tan Sad Chair Co Ltd Chairs
US4036525A (en) * 1976-04-08 1977-07-19 Gf Business Equipment, Inc. Backrest adjustment mechanism
US4099774A (en) * 1977-01-24 1978-07-11 Leggett & Platt, Incorporated Stenographer's chair
US4466665A (en) * 1982-01-25 1984-08-21 Robert Aronowitz Chair having adjsutable, cantilevered lumbar-supporting arm
FR2558360A1 (fr) * 1984-01-23 1985-07-26 Vinel Pierre Perfectionnements aux sieges, de bureau en particulier

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE523720C (de) * 1929-08-15 1931-04-27 Wagner Fa Robert Stuhl, dessen Lehne durch federnde, am Sitz verstellbar gefuehrte Halteglieder getragen wird
US2941329A (en) * 1958-04-30 1960-06-21 Robert E Apparius Chair leg extension
GB1139173A (en) * 1966-05-17 1969-01-08 Evertaut Ltd Improvements in or relating to adjustable back rests for chairs
US3520506A (en) * 1968-03-13 1970-07-14 Crawford Fitting Co Work stool
FR2088828A5 (fr) * 1970-04-27 1972-01-07 Modern Tube
GB1261489A (en) * 1970-12-04 1972-01-26 Evertaut Ltd Improvements in or relating to adjustable back rests for chairs
GB1395381A (en) * 1972-08-18 1975-05-29 Parnall & Sons Ltd Chairs
CH591226A5 (en) * 1975-09-05 1977-09-15 Giroflex Entwicklungs Ag Chair with pivoting backrest support arm - whose pivot axis is located in front of seat section support tube
US4170382A (en) * 1977-06-20 1979-10-09 Domore Office Furniture, Inc. Posture chair
FR2491311A1 (fr) * 1980-10-02 1982-04-09 Bessueille Jean Pierre Siege de travail, notamment pour agriculteur
US4934638A (en) * 1988-02-10 1990-06-19 Davis Kevin R Collapsible tripod stool
US4948197A (en) * 1989-03-27 1990-08-14 Sansing Dayna L Child shampooing chair

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE824100C (de) * 1944-08-02 1951-12-10 Tan Sad Chair Company 1931 Ltd Schwenklagerung fuer die Rueckenlehne eines Stuhles oder Sessels
US2917104A (en) * 1957-04-18 1959-12-15 Martin Richtel Adjustable chair
GB1346420A (en) * 1971-09-27 1974-02-13 Tan Sad Chair Co Ltd Chairs
US4036525A (en) * 1976-04-08 1977-07-19 Gf Business Equipment, Inc. Backrest adjustment mechanism
US4099774A (en) * 1977-01-24 1978-07-11 Leggett & Platt, Incorporated Stenographer's chair
US4466665A (en) * 1982-01-25 1984-08-21 Robert Aronowitz Chair having adjsutable, cantilevered lumbar-supporting arm
FR2558360A1 (fr) * 1984-01-23 1985-07-26 Vinel Pierre Perfectionnements aux sieges, de bureau en particulier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9219132A1 *

Also Published As

Publication number Publication date
EP0584152A4 (en) 1994-08-17
WO1992019132A1 (fr) 1992-11-12

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