EP0587536A1 - A height-adjusting mechanism for a chair's backrest - Google Patents

A height-adjusting mechanism for a chair's backrest Download PDF

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Publication number
EP0587536A1
EP0587536A1 EP93830257A EP93830257A EP0587536A1 EP 0587536 A1 EP0587536 A1 EP 0587536A1 EP 93830257 A EP93830257 A EP 93830257A EP 93830257 A EP93830257 A EP 93830257A EP 0587536 A1 EP0587536 A1 EP 0587536A1
Authority
EP
European Patent Office
Prior art keywords
height
backrest
rack
plate
stop pin
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Withdrawn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
EP93830257A
Other languages
German (de)
French (fr)
Inventor
Sergio Moreschi
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.)
Cofemo SpA
Original Assignee
Cofemo 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 Cofemo SpA filed Critical Cofemo SpA
Publication of EP0587536A1 publication Critical patent/EP0587536A1/en
Withdrawn legal-status Critical Current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
    • A47C7/402—Support for the head or the back for the back adjustable in height

Definitions

  • the present invention relates to a mechanism for adjusting the height and locking the back of the chairs. It finds its application in the field of office chairs having an applied and movable backrest along an upright.
  • the object of the present invention is to provide a particularly simple and effective mechanism for adjusting the height of the back of the chairs, consisting only of two elements, of minimal bulk, which makes it possible not to complicate the installation of the back, easily accessible and maneuverable when you want to change the positions of the backrest.
  • the mechanism which is the subject of the present invention is essentially in accordance with claim 1. It therefore basically consists of a rack and pinion toothing in a vertical direction, executed in the support support of the seat, in a locking / unlocking handle mounted on the sitting and moving with it along the upright, and comprising a stud which selectively engages in the rack teeth to obtain different positions in height of the backrest.
  • No. 10 indicates the amount of an office chair which receives a sliding plate 11 to which the backrest - not shown - of the chair itself is fixed. Normally, the upright extends upwards from the underside of the seat: the plate 11 which supports the backrest includes guides 12 coupled to the sides of the upright 10.
  • a toothed rack 13 was made along a vertical side of an oblong slot 14 which extends along the height of the upright.
  • On the back support plate 11 is mounted at 15 ′ on a pivot an oscillating lever 15 for locking / unlocking.
  • This oscillating lever 15 has an upper end provided with a stop pin 16, and a lower end 17 to be gripped for manual locking / unlocking maneuver, directly or indirectly by means of an extension rod.
  • the stud 16 of the lever 15 passes through an opening 18 made in the plate 11, it slides in the vertical slot 14 and engages in the rack teeth 13.
  • a spring 19 secured on one side to the lever 15, and on the other side to the plate 11, keeps the lever normally moved so that that its stop pin 16 constantly engages in the toothing 13.
  • the rack teeth 13 makes it possible to adjust the height of the plate 11 and therefore the backrest, along the support upright 10 in as many positions as there are teeth in the rack. To make this adjustment, it suffices to move the lever 16 so as to distance and disengage the stud from the toothing 13, plus slide the plate 11 with the backrest on the upright 10 until the desired height is obtained; at this time, it is left that the stud 16 of the lever 15, through the action of the spring 19, engages in the teeth of the rack at the corresponding level.
  • the operation is practical and simple to execute; the joystick is easily accessible and its location has no influence on the ordinary structure and mounting of the backrest.

Abstract

The subject of the present invention is a height-adjusting mechanism for a chair's backrest in which the height is adjusted by means of a toothed rack (13) produced in the backrest supporting upright (10), and by means of a pivoting locking/releasing handle (15) mounted on a pivot in the backrest supporting plate (11) and having a stop pin (16) which can engage at several levels in the toothed rack (13) with the aid of a spring (19). <IMAGE>

Description

La présente invention a pour objet un mécanisme pour le réglage en hauteur et le blocage du dossier des chaises. Elle trouve son application dans le domaine des chaises de bureau ayant un dossier appliqué et mobile le long d'un montant.The present invention relates to a mechanism for adjusting the height and locking the back of the chairs. It finds its application in the field of office chairs having an applied and movable backrest along an upright.

Des chaises avec un dossier réglable en hauteur le long d'un montant de support qui s'étend vers le haut en partant de la face inférieure de l'assise, existent déjà et sont bien connues. Mais dans les chaises à l'état de la technique, les mécanismes que l'on utilise pour commander ce réglage du dossier sont relativement compliqués, souvent encombrant et difficilement accessibles.Chairs with a backrest adjustable in height along a support upright which extends upwards from the underside of the seat, already exist and are well known. But in chairs in the prior art, the mechanisms that are used to control this adjustment of the backrest are relatively complicated, often bulky and difficult to access.

La présente invention a pour but de fournir un mécanisme de réglage en hauteur du dossier des chaises particulièrement simple et efficace, constitué seulement par deux éléments, d'un encombrement minime, qui permet de ne pas compliquer la mise en place du dossier et qui est facilement accessible et manoeuvrable lorsque l'on désire modifier les positions du dossier.The object of the present invention is to provide a particularly simple and effective mechanism for adjusting the height of the back of the chairs, consisting only of two elements, of minimal bulk, which makes it possible not to complicate the installation of the back, easily accessible and maneuverable when you want to change the positions of the backrest.

Le mécanisme objet de la présente invention est essentiellement conforme à la rivendication 1. Il consiste donc fondamentalement en une denture à crémaillère à direction verticale, exécutée dans le montant de support de l'assise, en une manette de blocage/déblocage montée sur l'assise et se déplaçant avec celle-ci le long du montant, et comprenant un téton qui s'engage sélectivement dans la denture à crémaillère pour l'obtention de différentes positions en hauteur du dossier.The mechanism which is the subject of the present invention is essentially in accordance with claim 1. It therefore basically consists of a rack and pinion toothing in a vertical direction, executed in the support support of the seat, in a locking / unlocking handle mounted on the sitting and moving with it along the upright, and comprising a stud which selectively engages in the rack teeth to obtain different positions in height of the backrest.

Les dessins ci-joints illustrent un exemple d'exécution fonctionnelle du mécanisme en question, et plus précisement:

  • La Fig. 1 montre le mécanisme vu en perspective,
  • La Fig. 2 montre la vue frontale du mécanisme de la Fig. 1, et
  • La Fig. 3 montre une section transversale selon les flèches III-III de la Fig. 2.
The attached drawings illustrate an example of a functional execution of the mechanism in question, and more precisely:
  • Fig. 1 shows the mechanism seen in perspective,
  • Fig. 2 shows the front view of the mechanism of FIG. 1, and
  • Fig. 3 shows a cross section along the arrows III-III of FIG. 2.

Dans ces dessins, le n° 10 indique le montant d'une chaise de bureau qui reçoit une plaque coulissante 11 à laquelle on fixe le dossier - non représenté - de la chaise elle-même. Normalement, le montant s'étend vers le haut à partir de la face inférieure de l'assise: la plaque 11 qui supporte le dossier comprend des guides 12 accouplés aux côtés du montant 10.In these drawings, No. 10 indicates the amount of an office chair which receives a sliding plate 11 to which the backrest - not shown - of the chair itself is fixed. Normally, the upright extends upwards from the underside of the seat: the plate 11 which supports the backrest includes guides 12 coupled to the sides of the upright 10.

Conformément à l'invention, dans le montant 10 on a exécuté une denture à crémaillère 13 le long d'un côté vertical d'une fente oblongue 14 qui s'étend selon la hauteur du montant. Sur la plaque 11 de support du dossier est montée en 15' sur pivot une manette oscillante 15 de blocage/déblocage. Cette manette oscillante 15 présente une extrémité supérieure munie d'un téton d'arrêt 16, et une extrémité inférieure 17 à saisir pour la manoeuvre manuelle de blocage/déblocage, directement ou indirectement au moyen d'un tirant de rallonge. Le téton 16 de la manette 15 passe par une ouverture 18 exécutée dans la plaque 11, il coulisse dans la fente verticale 14 et s'engage dans la denture à crémaillère 13. Un ressort 19 assujetti d'un côté à la manette 15, et de l'autre côté à la plaque 11, maintient normalement déplacée la manette de façon à ce que son téton d'arrêt 16 s'engage constamment dans la denture 13.According to the invention, in the upright 10 a toothed rack 13 was made along a vertical side of an oblong slot 14 which extends along the height of the upright. On the back support plate 11 is mounted at 15 ′ on a pivot an oscillating lever 15 for locking / unlocking. This oscillating lever 15 has an upper end provided with a stop pin 16, and a lower end 17 to be gripped for manual locking / unlocking maneuver, directly or indirectly by means of an extension rod. The stud 16 of the lever 15 passes through an opening 18 made in the plate 11, it slides in the vertical slot 14 and engages in the rack teeth 13. A spring 19 secured on one side to the lever 15, and on the other side to the plate 11, keeps the lever normally moved so that that its stop pin 16 constantly engages in the toothing 13.

En fait, la denture à crémaillère 13 permet de régler en hauteur la plaque 11 et donc le dossier, le long du montant de support 10 sur autant de positions qu'il y a de dents dans la crémaillère. Pour effectuer ce réglage, il suffit de déplacer la manette 16 de façon à éloigner et à désengager le téton de la denture 13, plus faire coulisser la plaque 11 avec le dossier sur le montant 10 jusqu'à l'obtention de la hauteur désirée; à ce moment, on laisse que le téton 16 de la manette 15, grâce à l'action du ressort 19, s'engage dans les dents de la crémaillère au niveau correspondant. L'opération est pratique et de simple exécution; la manette est facilement accessible et son emplacement n'a aucune influence sur la structure et le montage ordinaires du dossier.In fact, the rack teeth 13 makes it possible to adjust the height of the plate 11 and therefore the backrest, along the support upright 10 in as many positions as there are teeth in the rack. To make this adjustment, it suffices to move the lever 16 so as to distance and disengage the stud from the toothing 13, plus slide the plate 11 with the backrest on the upright 10 until the desired height is obtained; at this time, it is left that the stud 16 of the lever 15, through the action of the spring 19, engages in the teeth of the rack at the corresponding level. The operation is practical and simple to execute; the joystick is easily accessible and its location has no influence on the ordinary structure and mounting of the backrest.

Claims (3)

1) Mécanisme pour le réglage en hauteur du dossier des chaises avec le dossier fixé à une plaque (11) guidée et coulissant le long d'un montant de support (10), caractérisé en ce que: - une denture à crémaillère (13) est exécutée dans le montant de support (10) selon une direction verticale, - une manette à actionnement manuel de blocage/déblocage (15) oscillante est montée sur pivot dans la plaque (11) de support du dossier - la manette est munie d'un téton d'arrêt (16) destiné à s'engager à plusieurs niveaux dans la denture à crémaillère (13). 1) Mechanism for adjusting the height of the back of the chairs with the back fixed to a plate (11) guided and sliding along a support upright (10), characterized in that: - a rack and pinion (13) is executed in the support upright (10) in a vertical direction, - an oscillating manual locking / unlocking lever (15) is pivotally mounted in the back support plate (11) - The handle is provided with a stop pin (16) intended to engage on several levels in the rack and pinion (13). 2) Mécanisme selon la revendication 1), caractérisé en ce que: - la denture à crémaillère (13) est exécutée le long d'un côté vertical d'une fente oblongue (14) qui s'étend selon la hauteur du montant de support, - un téton d'arrêt (16) passe par une ouverture (18) exécutée dans la plaque (11) en direction transversale par rapport à la fente (14). 2) Mechanism according to claim 1), characterized in that: - the rack teeth (13) are executed along a vertical side of an oblong slot (14) which extends along the height of the support upright, - A stop pin (16) passes through an opening (18) made in the plate (11) in a transverse direction relative to the slot (14). 3) Mécanisme selon les revendications 1) et 2), caractérisé en ce que:
   - la manette de blocage/déblocage (15) est sollicitée par un ressort (19) tendant à la déplacer dans le but de maintenir ce téton d'arrêt (16) engagé dans la denture à crémaillère (13). 3) Mechanism according to claims 1) and 2), characterized in that:
- the locking / unlocking handle (15) is biased by a spring (19) tending to move it in order to keep this stop pin (16) engaged in the rack teeth (13).
EP93830257A 1992-09-09 1993-06-10 A height-adjusting mechanism for a chair's backrest Withdrawn EP0587536A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT92BS000084U IT228484Y1 (en) 1992-09-09 1992-09-09 DEVICE FOR POSITIONING IN HEIGHT OF THE CHAIR BACK
ITBS920084U 1992-09-09

Publications (1)

Publication Number Publication Date
EP0587536A1 true EP0587536A1 (en) 1994-03-16

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ID=11344902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93830257A Withdrawn EP0587536A1 (en) 1992-09-09 1993-06-10 A height-adjusting mechanism for a chair's backrest

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EP (1) EP0587536A1 (en)
CA (1) CA2098341A1 (en)
IT (1) IT228484Y1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0958764A1 (en) * 1998-05-22 1999-11-24 Unit Press Limited Slider mechanism
US6238000B1 (en) 1998-02-04 2001-05-29 Unit Press Limited Mechanism for chair
AU738653B2 (en) * 1996-11-18 2001-09-20 Klasse Pty Ltd Height adjustor means
US6619745B2 (en) 1999-12-03 2003-09-16 Unit Press Limited Connection assembly for a chair back

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725278A (en) * 1996-10-03 1998-03-10 Itw Plastiglide Chair back height adjuster

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036525A (en) * 1976-04-08 1977-07-19 Gf Business Equipment, Inc. Backrest adjustment mechanism
US4384742A (en) * 1981-03-11 1983-05-24 Haworth, Inc. Height adjusting mechanism for chair back

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036525A (en) * 1976-04-08 1977-07-19 Gf Business Equipment, Inc. Backrest adjustment mechanism
US4384742A (en) * 1981-03-11 1983-05-24 Haworth, Inc. Height adjusting mechanism for chair back

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU738653B2 (en) * 1996-11-18 2001-09-20 Klasse Pty Ltd Height adjustor means
US6238000B1 (en) 1998-02-04 2001-05-29 Unit Press Limited Mechanism for chair
EP0958764A1 (en) * 1998-05-22 1999-11-24 Unit Press Limited Slider mechanism
US6273384B1 (en) 1998-05-22 2001-08-14 Unit Press Limited Chair back adjustment mechanism
US6619745B2 (en) 1999-12-03 2003-09-16 Unit Press Limited Connection assembly for a chair back

Also Published As

Publication number Publication date
IT228484Y1 (en) 1998-02-19
CA2098341A1 (en) 1994-03-10
ITBS920084V0 (en) 1992-09-09
ITBS920084U1 (en) 1994-03-09

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