EP0701790A1 - Chaise réglable - Google Patents

Chaise réglable Download PDF

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Publication number
EP0701790A1
EP0701790A1 EP95113713A EP95113713A EP0701790A1 EP 0701790 A1 EP0701790 A1 EP 0701790A1 EP 95113713 A EP95113713 A EP 95113713A EP 95113713 A EP95113713 A EP 95113713A EP 0701790 A1 EP0701790 A1 EP 0701790A1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
chair according
longitudinal
parallelogram guide
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Withdrawn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
EP95113713A
Other languages
German (de)
English (en)
Inventor
Martin Ballendat
Wilhelm Geisbauer
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.)
Mayr-Schulmobel GmbH
Original Assignee
Mayr-Schulmobel GmbH
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 Mayr-Schulmobel GmbH filed Critical Mayr-Schulmobel GmbH
Publication of EP0701790A1 publication Critical patent/EP0701790A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/0246—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of screw-and-nut mechanism

Definitions

  • the invention relates to an adjustable chair with adaptation to the different body sizes of children or adults by individually adjustable seat height above the floor and common (synchronous) adjustment of seat depth and support point height of the backrest above the seat.
  • adjustable chairs are particularly suitable as school chairs, besides but also for office purposes and the like.
  • the object of the invention is to propose a chair, in particular a school chair, in which the seat depth and support point height are adjusted jointly and in a single handling function in order to adapt to very different body sizes can be, without the need for a bulky or significantly protruding mechanism below the seat.
  • This object is achieved by the invention specified in claim 1.
  • Appropriate configurations are specified in the subclaims. It can be seen that the backrest is held by a parallelogram guide.
  • the four parallel pivot axes for the parallelogram guide (two at the top, two at the bottom of the parallelogram guide) are each arranged transversely to the longitudinal direction of the seat and in pairs one behind the other.
  • This parallelogram guide achieves two things: on the one hand, when the seat depth is increased by pivoting the backrest upwards, the support point of the backrest above the seat increases accordingly. On the other hand, the inclination of the backrest is maintained in all positions due to the design of the backrest support as a parallelogram guide. The backrest is thus moved parallel to itself during the swiveling movement by the parallelogram guide even without the influence of external forces. It is therefore no longer necessary to adjust the backrest itself in relation to the backrest support in addition to the selected seat depth or the support point height of the backrest associated therewith.
  • pivot axes of the parallelogram guide are each arranged in the interior of a cross member. This can be at the top of the parallelogram guide be attached to the back of the backrest, but at the lower end of the parallelogram guide at the rear end of the seat or the seat support. It can be a separate part or integrally formed with the backrest, the seat or the seat support.
  • the backrest maintains its inclined position when pivoted for the purpose of increasing the seat depth or the support point height of the backrest.
  • the backrest by means of a pendulum joint to the upper end of the parallelogram guide and, if necessary, use a spring element here that defines a normal position of the backrest inclination, but still requires a certain additional adjustment among the Forces of the back of the user leaning against the backrest are permitted.
  • the parallelogram guidance of the backrest support according to the invention requires at least two longitudinal supports, each of which is supported at its ends on one of the swivel axes.
  • the side members will usually run parallel to each other. But they do not have to be straightforward. However, it can prove to be expedient to provide the front and / or rear longitudinal beam of the parallelogram guide in duplicate, so that, depending on the design, even more defined management relationships can be achieved.
  • the parallelogram guide can therefore consist of two, three or four side members. A larger number of side members is usually an unnecessary effort.
  • each of the two longitudinal beams has a cross section made from only two longitudinal beams Is U-shaped, the legs of one fit between the legs of the other and the two are placed with their open sides one inside the other. They then form a backrest support in the form of a completely closed box, so that jamming is reliably avoided during the adjustment movements or between the side members.
  • a central longitudinal beam of greater bending stiffness is expediently arranged in the longitudinal center plane of the chair, while two further longitudinal beams are arranged symmetrically on both sides of the chair, which may have a lower rigidity.
  • the longitudinal members are expediently curved at the lower end in the form of a forward-facing arc to the pivot axes on the seat or seat carrier. This creates more space behind the seat. It is also ensured by the resulting distance between the actual seat plate and the side members that parts of clothing or even parts of the body cannot be pinched during the adjustment.
  • the synchronous adjustment of seat depth and support point height of the backrest ensures that the selected setting is fixed in a conventional manner. This can be done continuously or step-by-step with an appropriate rest position.
  • a particularly expedient embodiment is obtained when a trailing arm is extended beyond its lower pivot axis into the seat support box and is given an adjustment option with the aid of a handwheel, which can also be combined with a display in front of a scale, so that a desired adjustment is facilitated or can be easily found again.
  • Figure 1 shows a school chair or office chair.
  • the chair 10 has a seat 12, a backrest 14, a seat support 16 and a chair foot 18 supporting the chair on the floor.
  • the chair foot is 18 designed as a midfoot with height adjustment and with support via five castors.
  • the invention can also be used on chairs which are designed as four-leg, C-leg, I-leg, T-leg or in some other way.
  • the backrest 14 is held by means of a parallelogram guide 20 comprising at least one front side member 22 and at least one rear side member 24.
  • the upper ends of the side members 22, 24 are mounted in a cross member 26 on the back of the backrest 14 on pivot axes 28 and 30, the lower ends of the side members 22, 24 on pivot axes 32, 34, which are themselves mounted in a cross member 36 , which is integrally formed with the seat support 16 as an extension thereof to the rear.
  • the pivot axes 28, 30 and 32, 34 each lie one behind the other in a horizontal plane and extend transversely to the longitudinal direction of the seat 12, that is to say are perpendicular to the paper plane of FIG.
  • pivot axes 28, 30 and 32, 34 can be construction parts in the same way as mere theoretical axes, so that then only articulation points are present at the ends of the longitudinal beams 22, 24.
  • the parallelogram guide 20 is a four-swivel chain.
  • Fig. 1 the seat depth T and the support point height H of the backrest 14 above the seat 12 is shown for the position of the backrest 14 on its backrest support in the form of the parallelogram guide 20 shown in solid lines. If the backrest 14 on its parallelogram guide 20 is now pivoted into the position shown in broken lines, the support point height increases with the seat depth, but the backrest 14 is displaced parallel to itself, that is to say no change in its inclination.
  • FIG. 2 shows an embodiment of the parallelogram guide 20 as a closed box.
  • the rear longitudinal member 24 is designed as a shell which is open towards the front and U-shaped in cross section, as can be clearly seen in FIG. 2. 3 that in the interior of this U-shaped shell of the rear side member 24 there is arranged the front side member 22, which is also U-shaped in cross section and whose leg spacing has been reduced accordingly.
  • the longitudinal beam 24 could also be designed as a flat chair. Both parts together form a closed box that prevents jamming.
  • each selected position of the backrest must also be fixable.
  • Numerous different possibilities are known for this.
  • the connection of the longitudinal beams 22, 24 to the pivot axes 32, 34 of their lower ends can take place via ratchet elements which hold a position once selected.
  • a selected position can also take place via wing nuts provided on these pivot axes 32 or 34 or handwheels attached here.
  • the setting options on such chairs are concentrated on or under the seat support. Such a configuration of the setting options is explained below:
  • FIG. 4 shows an embodiment in which the rear longitudinal member 24 again has the shape of a shell which is open towards the front and U-shaped in cross section, while the front longitudinal member 22 is designed as a rod lying in this shell.
  • Both longitudinal members 22, 24 have at their lower end the previously explained arc piece 44 and are mounted here on their pivot axes 32 and 34, which are arranged in parallel in the same horizontal plane at the rear end of the seat support 16 one behind the other.
  • the front longitudinal member 22 is here continued beyond the pivot axis 32 into the seat carrier 16 through an extension 46 which has at its end remote from the pivot axis 32 a holding fork 48 for a transverse bolt 50 which is penetrated in the center by a threaded bore 52 ( see Fig. 5).
  • a threaded rod 54 runs in the seat support 16, which is rotatable but non-displaceable in the longitudinal direction and which can be rotated with the aid of a handwheel 56.
  • the parallelogram can be guided with the handwheel 56 20 pivoted from the side members 22, 24 and thus the seat depth can be freely selected within the setting options.
  • an outwardly projecting signal pin 58 is provided on the outside of the holding fork 48, which penetrates an arcuate slot 60 in the lateral outer wall of the seat support 16 and here plays in front of a scale on which the setting of the seat depth can be read .
  • the adjustment of the seat depth and thus synchronously the support point height of the backrest 14 with the help of the handwheel 56 is of course self-locking in such a way that a once selected setting is maintained regardless of the forces acting on the backrest 14.
  • the parallelogram guide 20 and the four-swivel chain formed by it ensure that when the seat depth is adjusted, the inclined position of the backrest 14 always remains the same.
  • Fig. 6 shows yet another embodiment of the parallelogram guide 20, in which the rear longitudinal member 24 consists of a flat steel piece which, starting from its upper linkage in the pivot axis 30 on the cross member 26, first in a straight line downward and then in the already explained arc piece 44 for its linkage runs in the lower pivot axis 34 on the cross member 36.
  • the front side member 22 is here resolved into two mirror-symmetrically arranged cylindrical rods symmetrically on either side of the rear side member 24 or the longitudinal median plane of the chair, which are mounted at the top in the pivot axis 28 on the cross member 26, then turned parallel to the rear side member 24, and finally again with elbows of their lower pivot axis 32 are connected.
  • the parallelogram guide here consists of a total of 3 longitudinal beams. The embodiment is inexpensive and simple. Due to the resulting lateral distances between the side members due to the central arrangement of the rear side member 24 and the significant lateral distance between the two front side members 22 to this due to their cranking at the upper end, however, there is no danger of pinching even with this construction.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
EP95113713A 1994-09-15 1995-08-31 Chaise réglable Withdrawn EP0701790A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944432934 DE4432934C1 (de) 1994-09-15 1994-09-15 Verstellbarer Stuhl
DE4432934 1994-09-15

Publications (1)

Publication Number Publication Date
EP0701790A1 true EP0701790A1 (fr) 1996-03-20

Family

ID=6528332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95113713A Withdrawn EP0701790A1 (fr) 1994-09-15 1995-08-31 Chaise réglable

Country Status (2)

Country Link
EP (1) EP0701790A1 (fr)
DE (1) DE4432934C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2852215A1 (fr) * 2002-12-23 2004-09-17 Ri Shun Liao Mecanisme de reglage de la position en hauteur et horizontale pour le dossier d'une chaise
WO2006096883A2 (fr) * 2005-03-09 2006-09-14 Bretford Manufacturing, Inc. Chaise munie d'un dossier de siege auto-reglable

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29906745U1 (de) * 1999-04-15 1999-07-08 Voelkle Sitzmöbel
EP2368460A1 (fr) * 2010-03-27 2011-09-28 Shunjie Lu Chaise avec dossier à déplacement de va-et-vient
ITUA20163751A1 (it) * 2016-05-24 2017-11-24 Donati Spa Sedia o poltroncina con schienale regolabile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE387262A (fr) *
US2321385A (en) 1941-06-16 1943-06-08 Sikes Company Tilting chair
GB678890A (en) * 1950-08-23 1952-09-10 Evertaut Ltd Improvements relating to chairs
DE7113781U (de) 1970-10-29 1972-04-06 Bergmann R Stuhl
GB2085719A (en) * 1980-08-20 1982-05-06 Antocks Lairn Ltd Adjustable chairs
US4496190A (en) * 1983-02-10 1985-01-29 Uop Inc. Parallel folding armrest

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9301473U1 (fr) * 1993-02-03 1993-03-25 Brodmerkel, Markus, 6140 Bensheim, De

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE387262A (fr) *
US2321385A (en) 1941-06-16 1943-06-08 Sikes Company Tilting chair
GB678890A (en) * 1950-08-23 1952-09-10 Evertaut Ltd Improvements relating to chairs
DE7113781U (de) 1970-10-29 1972-04-06 Bergmann R Stuhl
GB2085719A (en) * 1980-08-20 1982-05-06 Antocks Lairn Ltd Adjustable chairs
US4496190A (en) * 1983-02-10 1985-01-29 Uop Inc. Parallel folding armrest

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2852215A1 (fr) * 2002-12-23 2004-09-17 Ri Shun Liao Mecanisme de reglage de la position en hauteur et horizontale pour le dossier d'une chaise
WO2006096883A2 (fr) * 2005-03-09 2006-09-14 Bretford Manufacturing, Inc. Chaise munie d'un dossier de siege auto-reglable
WO2006096883A3 (fr) * 2005-03-09 2006-11-02 Bretford Mfg Inc Chaise munie d'un dossier de siege auto-reglable

Also Published As

Publication number Publication date
DE4432934C1 (de) 1996-02-08

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