EP0956792A2 - Support pour une chaise oscillante ou synchronisée - Google Patents

Support pour une chaise oscillante ou synchronisée Download PDF

Info

Publication number
EP0956792A2
EP0956792A2 EP99107347A EP99107347A EP0956792A2 EP 0956792 A2 EP0956792 A2 EP 0956792A2 EP 99107347 A EP99107347 A EP 99107347A EP 99107347 A EP99107347 A EP 99107347A EP 0956792 A2 EP0956792 A2 EP 0956792A2
Authority
EP
European Patent Office
Prior art keywords
support
racks
stop
pivot
chairs according
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Withdrawn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
EP99107347A
Other languages
German (de)
English (en)
Other versions
EP0956792A3 (fr
Inventor
Armando Donati
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.)
Donati SpA
Original Assignee
Donati SpA
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 Donati SpA filed Critical Donati SpA
Publication of EP0956792A2 publication Critical patent/EP0956792A2/fr
Publication of EP0956792A3 publication Critical patent/EP0956792A3/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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
    • A47C1/03238—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 peg-and-notch or pawl-and-ratchet mechanism
    • 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

Definitions

  • the invention relates to a support for oscillating or synchronized chairs, endowed with a device to stop the inclination in tilted positions, for the use In the chairs or armchairs.
  • the term chair also covers armchairs and any similar furniture, particularly for the office.
  • the term synchronized is applied to the chairs and armchairs in which the angle of oscillation of the back is different from that of the seat; the term oscillating is applied to chairs and armchairs in which seat and back tilt with the same angle.
  • State of the art chairs are known, for instance for the office, where the seat and the back are joined and can tilt simultaneously to allow the user to regulate the tilted position of the back and of the seat. They are equipped with a mechanism to stop at the tilted position formed by a rod toothed as a rack that is hooked to a pivot or body connected to the inclinable back.
  • This mechanism must be constructed with adequate dimensions of the pivot and of the rack, to resist the stresses of the load and for the wear and tear that results from the frequent insertion and disengagement of the pivot in the rack.
  • the sizes of the teeth and of the pivot therefore, could not be very small, such as would be necessary to achieve a fine adjustment of the blocked inclination position.
  • An object of the present invention is to solve the aforementioned problems, by means of a mechanical stop device or the inclination of the back and the seat that allows much finer regulation, i.e. with a larger number of stop positions of the seat and of the back.
  • the distance between the teeth of the side by side racks is equal to P/ n, where P is the distance between the teeth and n is the number of racks placed side by side.
  • said number of racks is more than two and they are oscillating on the same pivot.
  • the stop pivot is present at the end of an oscillating arm rigidly connected to an oscillating part to which the back is solidly fixed.
  • each rack is equipped with a rear arm and reaction spring to force the meshing of the teeth with the stop pivot.
  • each rack on the upper side of each rack at least one cam prominence is provided and the rack is controlled by a selector acting on said cam to avoid or allow the meshing with said stop pivot.
  • the support for oscillating and inclinable chairs according to the present invention presents numerous advantages. In the first place, it allows the user to choice the desired inclination of the seat and of the back from a large range of positions.
  • the multiple racks on the same pivot and with staggered teeth allow the selection of a wide range of positions in that at least one of the racks meshes with the stop pivot in the position as desired by the user.
  • the angular distance between of the positions of stop of the inclination can be reduced at will by increasing the number of rack places side by side. In fact, the more are the racks the lower are the differences between the teeth, maintaining always the pitch of the teeth in a single rack within acceptable values for the mechanical resistance.
  • the device is therefore strong and economical and is also easy to use due to the selector of the oscillation of the rack that allows to disconnect all the racks and maintain them lifted and disconnected from the stop pivot on which the spring pushes the same.
  • the support for oscillating and inclinable chairs comprises a fork 1 equipped with a base 2 for attachment of a seat back (not shown).
  • the fork 1 oscillates on a transversal pivot 3 by means of rotation supports 4 with which a body 5 is provided.
  • An arm 6, oscillating within the body 5, is rigidly connected to the pivot 3 and carries a pivot reaction pin 7 for the inclination spring 8 (figure 2), as well as a stop pivot 9, in the portion of the arm 6 more far from the axis of oscillation.
  • At least two toothed racks 10 and 11, with staggered teeth 12, are arranged side by side and oscillating above the said stop pivot 9.
  • the racks are joined in oscillation on a pivot 13, parallel but shifted with reference to the transversal pivot 3, said oscillation occurring against the action of a respective closure spring 14, acting on a back arm 15 of each rack.
  • a selector 16 through a point 17 acts on all the racks between said pivot 13 and the respective arm 15, to control their oscillation freedom.
  • a cam prominence 18, on each upper side 19 of the racks, allows the selection of two racks positions: in the position of figure 1 the rack is free to oscille, while in that of figure 4 the rack is open with a release of the stop pivot 9 from all said racks.
  • Said selector 16 presents a point 17 sliding on a block 20, against the action of springs 21, which block 20 is in turn controlled in its oscillations from the outside of the body 5 by means of a horizontal rod 22.
  • the support for chair presents L-shaped irons 23 for fixing the seat (not shown), joined in oscillation, by means fo pivots 24 and 25, to said fork 1 and said body 5; the L-shaped irons have elongated with slots 26 to allow horizontal shiftings of the seat with reference to the back.
  • Figure 2 furthermore shows, a knob 27 actuating the pivot 25 for a horizontal shifting of the seat, a lever 28 actuating said rod 22 for controlling said selector 16 and a lever 29.
  • the lever 29 controls, by means of a pivot 30, a finger lever 31 controlling a damper, which is adjustable in height and located in the chair support column 32.
  • the Inclination spring 8 is opposed by a seat 33 of the body 5, which could be made adjustable if necessary.
  • Figure 5 shows the actual pitch P of the adjoining teeth on a single rack, and the apparent pitch A of the racks placed side by side, equal to P/ n, where n is the number of the racks. As mentioned above, increasing the number of racks placed side by side the apparent pitch A decreases.
  • the support for oscillating and inclinable chairs operates as follows: the user, acting on the lever 28 drives the rod 22 and varies the action of the selector 16 on the racks 10, 11, carrying said selector into the position as shown in fig. 4 (toward the springs 14), forcing the racks to rise, disengaging them from the stop pivot 9.
  • the user can now tilt the seat and the back into the desired position with the weight of his own body: the fork 1 turns with the pivot 2 on the supports 4 and, simultaneously, the arm 6 with the stop pivot 9 oscillates in the space underlying the racks, still raised as shown in figure 4.
  • the user moves the rod 22 carrying the selector 16 as in figure 1, beyond the cam prominence 18, where the point 17 no longer influences the oscillation of the racks.
  • the springs 14 push the racks downward; the rack with a tooth nearest the position of the stop pivot 9 lawers itself under the action of the spring 14 to lock on said pivot, preventing further oscillations of the chair.
  • the remaining racks rest with their teeth on the pivot 9, without locking it.
  • the horizontal position of the seat is adjusted by acting on the knob 27 that controls the spring controlled pivot 25 to put the same in a disengagement position, so that the L-angle irons 23 could slide along the slots 26 on the pivots 24 and 25 of the fork 1 and body 5.
  • the user releases the knob that stops, under the action of the spring wound on the pivot 25, the slide of the said L-angle irons and therefore of the seat with respect to the back.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Special Chairs (AREA)
EP99107347A 1998-04-27 1999-04-21 Support pour une chaise oscillante ou synchronisée Withdrawn EP0956792A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI980895 IT1306231B1 (it) 1998-04-27 1998-04-27 Supporto per sedia oscillante o sincronizzata
ITMI980895 1998-04-27

Publications (2)

Publication Number Publication Date
EP0956792A2 true EP0956792A2 (fr) 1999-11-17
EP0956792A3 EP0956792A3 (fr) 2001-02-07

Family

ID=11379899

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99107347A Withdrawn EP0956792A3 (fr) 1998-04-27 1999-04-21 Support pour une chaise oscillante ou synchronisée

Country Status (2)

Country Link
EP (1) EP0956792A3 (fr)
IT (1) IT1306231B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12514370B2 (en) 2021-03-17 2026-01-06 Steelcase Inc. Seating arrangement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779655A (en) * 1971-12-23 1973-12-18 Sanshin Kinzoku Ind Co Ltd Angle variable joint for foldable chair
FR2258817A1 (en) * 1974-01-28 1975-08-22 Faure Bertrand Automobile seat back inclination adjuster - has central cam controlling toothed segments engaging toothed ring
DE3629882A1 (de) * 1986-09-02 1988-03-10 Girsberger Holding Ag Sicherheitsverriegelung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12514370B2 (en) 2021-03-17 2026-01-06 Steelcase Inc. Seating arrangement

Also Published As

Publication number Publication date
ITMI980895A1 (it) 1999-10-27
EP0956792A3 (fr) 2001-02-07
IT1306231B1 (it) 2001-06-04

Similar Documents

Publication Publication Date Title
US4861106A (en) Seat for an office chair or the like, with seat and back adjustable, especially by body weight displacement
US6588843B1 (en) Chair control
EP3262982B1 (fr) Mécanisme d'inclinaison de siège
US6250715B1 (en) Chair
US6513222B2 (en) Method for adjusting a seat
US6557939B1 (en) Adjustment mechanism, back cover and arm rest for a chair
JP6244364B2 (ja) 椅子アームアセンブリ
US3295885A (en) Rockable reclining chair construction
EP0721751A2 (fr) Dispositif pour chaise inclinable
EP1364603B1 (fr) Chaise haute pour enfants à réglage aisé
US7497512B2 (en) Recliner drive mechanism for a rocker chair
EP1531705B1 (fr) Support pour chaises basculantes ou synchronisees
US6598936B1 (en) Multi-task mid-pivot chair control mechanism
EP3556252B1 (fr) Mécanisme d'inclinaison pour chaise et chaise
EP1699316A2 (fr) Fauteuil a mecanisme de verrouillage d'inclinaison
EP1353584B1 (fr) Chaises
EP0680713A1 (fr) Mécanisme pour chaise de relaxation
EP0956792A2 (fr) Support pour une chaise oscillante ou synchronisée
EP0956793A2 (fr) Support basculant pour chaise
EP1161902B1 (fr) Chaise avec un dispositif de commande
EP1057428A1 (fr) Accoudoir pour chaise
EP1878360A1 (fr) Chaise avec siège et dossier à mouvement synchronisé
US20060082201A1 (en) Chair
EP4483754B1 (fr) Chaise pour l'assise d'un utilisateur
EP1097660B1 (fr) Fermeture à glissière pour reglage de la position des chaises ou parties des chaises

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20010808

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566