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WO1992021270A1 - Siege - Google Patents

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Publication number
WO1992021270A1
WO1992021270A1 PCT/DE1991/000479 DE9100479W WO9221270A1 WO 1992021270 A1 WO1992021270 A1 WO 1992021270A1 DE 9100479 W DE9100479 W DE 9100479W WO 9221270 A1 WO9221270 A1 WO 9221270A1
Authority
WO
WIPO (PCT)
Prior art keywords
support arm
seat
armchair
backrest
foot
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.)
Ceased
Application number
PCT/DE1991/000479
Other languages
German (de)
English (en)
Inventor
Stefan Hoffmann
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.)
Sifa Sitzfabrik GmbH
Original Assignee
Sifa Sitzfabrik 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
Priority to AT0081690A priority Critical patent/AT394134B/de
Application filed by Sifa Sitzfabrik GmbH filed Critical Sifa Sitzfabrik GmbH
Priority to PCT/DE1991/000479 priority patent/WO1992021270A1/fr
Publication of WO1992021270A1 publication Critical patent/WO1992021270A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • A47C9/00—Stools for specified purposes
    • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects
    • A47C9/005—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects with forwardly inclined seat, e.g. with a knee-support
    • 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
    • A47C1/027—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 clamps or friction locking members

Definitions

  • the invention relates to an armchair with a foot, a foot column, a seat arranged on the foot column, the inclination of which is adjustable, and with an adjustable backrest which is supported at least on the foot column by means of a support arm and which extends around at least one, essentially horizontal axis a first, substantially upright and located substantially above the seat level
  • Position of use in a second, essentially lying, and essentially below the seat level position of use is adjustable.
  • Convertible armchairs of this type are known from GB-PS 2 202 138 and WO-88/04903, in which a one-piece, extended support arm or support is provided for a backrest, which is used to convert one position of use into the other can be pivoted with the backrest body or leading over the seat of the chair.
  • a disadvantage of these embodiments is that the pivot angle is limited by abutting the support arm, such as in the variant according to Fig. 2 of GB-PS 2 202 138, to the bottom part and that only the self-suspension of the extended arm instead of one for the backrest body own defined spring force is provided.
  • the process of tilting the seat is rigidly coupled with the process of pivoting the backrest.
  • a gear or a latching mechanism is provided and according to
  • WO-88/04903 Proposed by WO-88/04903, the seat is simultaneously tilted forward by the lower rail part of the support that comes up during the conversion. This has the disadvantage of less flexibility with regard to body-appropriate adjustments and represents an undesired restriction.
  • a variant known from WO-88/04903 leads in which the conversion takes place by separating the backrest part and attaching it as a knee-rest to a foot part , through the separation steps to a corresponding operating effort.
  • a chair-like, convertible seat device is also known from DE-OS 36 23 224.
  • This proposed solution is also based on a one-piece support arm, which, however, in contrast to the variants according to the above-mentioned GB-PS 2 202 138 must be U-shaped so that it can be pivoted past the front edge of the seat, leading over the seat surface.
  • An additional effort compared to conventional office armchairs is also given by the required special storage part for such a U-shaped support arm.
  • GB-A-2 085 719 describes a basically conventional office armchair in which the backrest is formed in two parts and is adjustable by a special lever mechanism.
  • EP-Al-107 627 describes an armchair whose backrest is partly constructed in segments and partly contains a large number of internal adjusting devices in order to enable adaptation to the anatomical conditions of the user.
  • the large number of stiffening segments that are connected to each other via levers or springs is remarkable.
  • the associated adjustment mechanisms are also extremely complex.
  • the object of the invention is to provide an armchair which can be quickly converted from a conventional office armchair into a so-called knee armchair, also known as a "balance armchair".
  • a balance armchair and a conventional office armchair are used alternately to load the muscle and skeleton parts more evenly over a working day.
  • the support arm consists of two parts which can be pivoted and locked relative to one another about an essentially horizontal axis.
  • the armchair according to the invention offers
  • Armchair constructions all the advantages of the well-known armchair with foot column, combined with a conversion option that is both constructive Effort and operation are extremely simple. Bulky constructions, such as are part of the state of the art, are avoided.
  • FIG. 1 shows an armchair according to the invention with its backrest in a first position of use in a schematic side view
  • FIG. 2 in a same view the armchair with its backrest in a second position of use
  • FIG. 3 in a partial view in the direction of the arrow of FIG Fig. 1 seat and back of the armchair according to Fig. 1
  • Figs. 4 to 7 in partial side view of a second embodiment of the invention in different phases of conversion from a knee chair into a conventional armchair
  • Fig. 8 and 9 in partial side view a third Variant of the invention
  • Fig. 10 in partial side view a fourth variant of the invention.
  • an armchair according to the invention consists of a foot 1, a foot pillar 2, a seat 3 arranged on the upper end of the foot pillar 2, and a backrest 4 which is supported or fastened to the foot pillar 2.
  • the foot column 2 is generally adjustable in height in a known manner by telescoping and can be locked in different positions.
  • the lower part 2a of the foot column 2 can be formed in one piece with the foot 1.
  • the seat 3 is by means of a pivot bearing 5 to the Upper part 2b of the foot column 2 articulated and thus more or less tiltable to the front or back, whereby it can be locked in its tilted positions, for example by means of a strut 6, which can be locked in the manner not shown here on the foot 2, for example by means of a clamping screw or a pin-hole row connection.
  • the backrest 4 is fastened to the upper part 2b of the foot column 2 by means of a support arm 7.
  • the support arm consists of two parts 7a, 7b which can be pivoted relative to one another about an essentially horizontal axis al and which can be fixed in their mutual positions. This can e.g. by means of a fixable gas pressure spring 8. 1 shows a position in which the parts 7a, 7b run at right angles to one another; A position in which the part 7b is inclined to the rear by approximately 30 ° is shown in broken lines in order to give the backrest 4 a corresponding inclination.
  • the support arm part 7a is fastened to the upper part 2b of the foot column 2 by means of a rotary bearing 9 and can be rotated with respect to the part 7a about the axis s of the foot column 2, whereby it can be determined in two rotational positions different by 180 °, for example by latching or one Clamping screw (not shown).
  • the backrest 4 in this embodiment consists of a lower, larger part 4a and an upper, smaller part 4b. Both parts 4a, 4b are mutually adjustable about an essentially horizontal axis a2 and in their mutual positions, for example, by increased frictional force, but a complete locking is also conceivable.
  • Rotary bearing 9 located horizontal axis a3 can be pivoted downward by approximately 90 °, which is explained in more detail below.
  • the armchair according to the invention can be transformed from the shape shown in Fig. 1 into a knee chair.
  • the support arm part 7a and the seat 3 are rotated about the pivot bearing 9 by 180 ° with respect to the foot column part 2b and then the entire support arm 7 together with the backrest 4 is pivoted downward about the axis a3 by 90 °.
  • the upper backrest part 4b can be folded around the axis a2 and the inclination of the seat 3 around the pivot bearing 5 can be adjusted somewhat forwards in order to achieve the shape shown in FIG. 2, in which the backrest 4 instead of as in FIG 1 serves as a backrest, now as a knee or shin-rest. It is fixed about an axis a4, preferably at about 20 ° with respect to the horizontal, to adapt to the knee or shin after the load has been applied.
  • FIG. 3 shows a possible embodiment of the lower part 4a or the upper part 4b of the backrest 4 with the seat 3 in a partial view in the direction III in FIG. 1, the parts 4a and 4b around a substantially horizontal axis a2 are adjustable.
  • the transformation of the chair from a knee chair into the usual shape shown in FIG. 1 and vice versa can also be carried out according to the steps shown in FIGS. 4 to 7.
  • 4 shows a position which corresponds to the knee chair function according to FIG. 2.
  • Fig. 5 it is indicated by the arrow that in the embodiment shown in Figs.
  • the seat 3 is designed to be displaceable and lockable with respect to the foot column 2, so that the armchair after the seat 3 has been set horizontally according to by subsequent displacement in the direction of the arrow and rotation through 180 ° about which the axis s can first be brought into the position shown in FIG. 6.
  • the transition from the position shown in FIG. 6 to that according to FIG. 7 takes place by folding the support arm 7 up by 90 ° about the axis a3 and rotating the backrest 4 about the axis a4.
  • the upper part 4b of the backrest 4 which can be rotated about the axis a2, has been omitted in FIGS. 4 to 7.
  • the back 4 can also be made in one piece or can also consist of more than two parts.
  • one advantage of such an embodiment is in particular that a change of function can be carried out while sitting, whereby the armchair fulfills that of a real combination chair in addition to the function of a simple office work chair.
  • the support arm part 7b has a lockable swivel joint 10 which allows this support arm part to be rotated in itself, ie around its axis a5 by 180 °.
  • the backrest 4 can move out of the usual positions shown in FIG be turned laterally by 180 ° into their lower knee chair position according to FIG. 9.
  • Fig. 9 it is indicated by further rotary arrows that the backrest 4 is adjustable about the axis a4 and that the support arm 7a can be rotated horizontally by means of the pivot bearing 9.
  • the seat 3 does not have to be designed to be displaceable, as in FIG. 5, in order to be able to carry out a conversion corresponding to the positions in accordance with FIGS.
  • FIG. 10 shows schematically that the support arm 7 or at least one of the support arm parts 7a, 7b in this variant are adjustable in length, in particular telescopic, in order to obtain the desired relative position of the backrest 4 to the seat 3, the backrest 4 about the axis a4 is also rotatable.
  • the illustrated and described embodiments of the invention show how a chair can be quickly converted from one seat to the other, with a particular advantage being that the manufacturing cost of a
  • Combination chair according to the invention are only slightly higher than that of a conventional office chair.

Landscapes

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

Abstract

Un fauteuil comportant un pied (1), une colonne (2), un siège (3) disposé sur la colonne (2) dont l'inclinaison est réglable, ainsi qu'un dossier (4) maintenu par un bras porteur (7) au moins sur la colonne (2), ledit accoudoir pouvant être réglé autour d'un axe essentiellement horizontal (a3, a1, a4) pour passer d'une première position d'utilisation essentiellement verticale et située essentiellement au-dessus du plan du siège, à une deuxième position d'utilisation essentiellement horizontale et située essentiellement au-dessous du plan du siège, le bras porteur (7) étant composé de deux parties (7a, 7b) susceptibles de pivoter l'une par rapport à l'autre autour d'un axe essentiellement horizontal (a1) et pouvant être immobilisées l'une par rapport à l'autre.
PCT/DE1991/000479 1990-04-05 1991-05-05 Siege Ceased WO1992021270A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT0081690A AT394134B (de) 1990-04-05 1990-04-05 Sessel
PCT/DE1991/000479 WO1992021270A1 (fr) 1990-04-05 1991-05-05 Siege

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0081690A AT394134B (de) 1990-04-05 1990-04-05 Sessel
PCT/DE1991/000479 WO1992021270A1 (fr) 1990-04-05 1991-05-05 Siege

Publications (1)

Publication Number Publication Date
WO1992021270A1 true WO1992021270A1 (fr) 1992-12-10

Family

ID=49115607

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000479 Ceased WO1992021270A1 (fr) 1990-04-05 1991-05-05 Siege

Country Status (2)

Country Link
AT (1) AT394134B (fr)
WO (1) WO1992021270A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7252336B2 (en) * 2001-11-06 2007-08-07 Matthew Stephen Frisina Pivotable boat seat
US7293825B2 (en) * 2004-09-10 2007-11-13 Advantage Branch & Office Systems, Llc Multi-position chair
US20240041215A1 (en) * 2020-12-17 2024-02-08 Runnerfly Ltd Convertible chair

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4234883C1 (de) * 1992-10-16 1994-04-21 Pius Ponticelli Stuhl

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578879A (en) * 1945-09-15 1951-12-18 Sturgis Posture Chair Company Adjustable bisectional back rest
GB2202138A (en) * 1987-03-20 1988-09-21 Andrew Magnar Kvalheim Multi-position convertible therapeutic chair

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2085719B (en) * 1980-08-20 1984-04-11 Antocks Lairn Ltd Adjustable chairs
EP0107627B1 (fr) * 1982-10-22 1986-01-02 Castelli S.P.A. Chaise dont le dossier comporte plusieurs segments articulés
DE3623224A1 (de) * 1986-07-10 1988-01-21 Moll Helmuth Stuhlartige sitzvorrichtung
DE3635105A1 (de) * 1986-10-15 1988-04-28 Martin Steifensand Sitzmoebel Sitzmoebel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578879A (en) * 1945-09-15 1951-12-18 Sturgis Posture Chair Company Adjustable bisectional back rest
GB2202138A (en) * 1987-03-20 1988-09-21 Andrew Magnar Kvalheim Multi-position convertible therapeutic chair

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7252336B2 (en) * 2001-11-06 2007-08-07 Matthew Stephen Frisina Pivotable boat seat
US7293825B2 (en) * 2004-09-10 2007-11-13 Advantage Branch & Office Systems, Llc Multi-position chair
US7357315B2 (en) 2004-09-10 2008-04-15 Advantage Branch & Office Systems, Llc Customer interaction console and configurable console system
US20240041215A1 (en) * 2020-12-17 2024-02-08 Runnerfly Ltd Convertible chair
US12414632B2 (en) * 2020-12-17 2025-09-16 Runnerfly Ltd Convertible chair

Also Published As

Publication number Publication date
AT394134B (de) 1992-02-10
ATA81690A (de) 1991-08-15

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