EP0594094B1 - Chaise, notamment chaise de bureau - Google Patents

Chaise, notamment chaise de bureau Download PDF

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Publication number
EP0594094B1
EP0594094B1 EP93116763A EP93116763A EP0594094B1 EP 0594094 B1 EP0594094 B1 EP 0594094B1 EP 93116763 A EP93116763 A EP 93116763A EP 93116763 A EP93116763 A EP 93116763A EP 0594094 B1 EP0594094 B1 EP 0594094B1
Authority
EP
European Patent Office
Prior art keywords
release cam
chair
lever
tilt lever
axially adjustable
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.)
Expired - Lifetime
Application number
EP93116763A
Other languages
German (de)
English (en)
Other versions
EP0594094A1 (fr
Inventor
Martin Zwetz
Oliver Hirschoff
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.)
Wilhelm Link & Co KG Stahlrohrmobel GmbH
Original Assignee
Wilhelm Link & Co KG Stahlrohrmobel 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 Wilhelm Link & Co KG Stahlrohrmobel GmbH filed Critical Wilhelm Link & Co KG Stahlrohrmobel GmbH
Publication of EP0594094A1 publication Critical patent/EP0594094A1/fr
Application granted granted Critical
Publication of EP0594094B1 publication Critical patent/EP0594094B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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 a chair, in particular office chair, with a backrest which is infinitely adjustable in its inclined position relative to a seat and pretensioned in one of its end positions, which is held in its inclined positions by a frictional multi-plate clutch which has at least one tension spring acting on the plates and which can be actuated by means of a handle lever arranged below the seat surface, the at least one tension spring being arranged concentrically on an axially adjustable bearing pin which is guided through slots in the clutch plates and forms an abutment for the tension spring.
  • Frictional multi-plate clutches for the backrests of office chairs are already known in various embodiments.
  • the multi-plate clutch is actuated by the chair user by means of a screw nut, with the disadvantage that the strength of the frictional connection depends on the rotational position of a clamping nut and thus ultimately on the force of an operator.
  • a construction with the above features and with the power of a chair user independent frictional engagement of the multi-plate clutch is known from DE-PS 29 27 377.
  • this construction does not take into account the existing requirement in modern office chairs for a compact structure and the possibility that a chair user can rock freely with the backrest without constantly having to operate a lever.
  • the invention is therefore based on the object of designing a chair with the features mentioned at the beginning of a device for tilting the backrest in such a way that the adjusting device allows a compact structure with few individual parts with optional locking or releasing the backrest.
  • the handle lever is connected to a release cam which acts on a link part which is coupled to the axially adjustable bearing pin and which has a latching recess for the release cam at least in one of its end positions.
  • the release cam connected to the handle lever can be pivotable about a fixed axis and can rest against a profiled surface of the link part, which can be designed as a driving connection with the axially adjustable bearing pin in both directions, pivotable about a fixed axis rocker arm.
  • both the actuation of the friction multi-plate clutch and its locking in its release position or its clutch position are achieved solely by these two parts in the chair designed according to the invention Release cam and the link part, reached without additional safety parts. This results in a space-saving, compact design of the friction clutch and their actuating part possible.
  • the pivotable release cam can have a locking lug, which in both end positions of the release cam fits into a locking recess of the profiled contact surface of the rocker arm, which has an oblique sliding surface leading to the rocking movement of the rocker arm between its locking recesses.
  • the trigger cam in its two pivoting directions can always be held against the rocker arm, which remains exposed to the action of the tension spring due to its driving coupling with the bearing pin - albeit with changing spring force.
  • the pivot bearing of the rocker arm can also be designed as an open bearing, expediently consist of a bearing half-shell, in which the rocker arm engages appropriately with a bearing projection having a partial circular cross section. The subsequent formation of bearing bores and the use of a separate bearing pin can therefore be omitted.
  • the construction according to the invention allows the few individual parts to be produced in their final shape, completely or largely without post-processing of these parts.
  • Fig. 1 shows part of a chair frame of a seat support plate 10 and a vertical bearing plate 11 connected to the seat support plate and a horizontal mounting plate 12 of the seat support part of the chair frame.
  • a support arm 13 can be seen from a backrest support, to which, in the construction shown, a second, identical support arm, not shown, which runs parallel and at a distance from it is associated.
  • Both support arms can be pivoted about a pivot axis 14 arranged in the bearing plate 11 about a limited angular range which can be seen at an elongated hole 15 of the bearing plate 11, and are mounted so as to be continuously lockable in this pivoting region.
  • FIGS. Fig. 1 shows that long plates 17 of the multi-plate clutch are also mounted on the pivot axis 14 for the support arms 13 and with their ends protruding from the coupling 16 are connected to each other by a rod 18, which through the already mentioned, the inclination limiting slot 15th protrudes in the bearing plate 11.
  • a spring torsion spring 19 pushed onto the pivot axis 14 engages the rod 18 with its one spring end 19.1.
  • the other spring end 19.2 is supported on the mounting plate 12.
  • the screw torsion spring 19 causes a pretension via the rod 18 the support arms 13 in a front end position of the backrest support with its support arms 13, which is shown in Fig. 1.
  • the long fins 17 with large openings 17.1 are pushed with a known interposition of short fins 20 over a bearing pin 21 which is axially displaceably mounted in a coupling housing 22 fastened on the mounting plate 12.
  • the disk pack 17/20 of the disk clutch lies on the one hand against a fixed wall 23 of the clutch housing 22 and is limited on the other hand by a thrust washer 24 which is also pushed onto the bearing pin 21 and which is simultaneously guided in a bearing opening 25 of the bearing housing 22.
  • disc springs 26 - On the outside of the thrust washer 24 there are disc springs 26 - here four disc springs - which are also pushed onto the bearing pin 21 and whose other abutment is formed by a clampable screw nut 27 which is screwed onto a threaded end 21.1 of the bearing pin 21.
  • the other end 21.2 of the bearing pin 21, which also protrudes from the clutch housing 22, is coupled via a driver cross pin 28 to a plate-shaped rocker arm 29, the plate shape of which can best be seen from FIG. 1, which also shows a groove 30 of the rocker arm 29, in which engages the driving cross bolt 28.
  • the rocker arm 29 coupled in its central part to the bearing pin 21 is provided at its lower end with a projecting web 31 with a semicircular cross section, which engages in a suitable manner in a bearing groove 32 formed on the clutch housing 22.
  • Web 31 and bearing groove 32 form the pivot bearing point for the rocker arm 29, which is provided in the region of its other end with a profiled link surface 33 which interacts with the detent 34 of a release cam 35.
  • the trigger cam 35 is mounted in the coupling housing 22 so as to be pivotable about an axis 36 and is not provided for reasons of clarity lever mechanism shown connected to a handle lever arranged below the chair seat in the grip area of a chair user.
  • the link surface 33 is limited towards the free end of the rocker arm 29 by a stop web 33.1. This web is followed by a first latching surface 33.2, followed by an inclined sliding surface 33.3. The backdrop surface finally ends with a second locking surface 33.4.
  • FIG. 1 and 2 show the release cam 35 in a position in which the multi-plate clutch is in frictional engagement of its plates 17, 20.
  • the locking lug 34 of the release cam 35 is self-locking on the locking surface 33.4 of the rocker arm 29, which is pivoted clockwise around its bearing point 31/32 and has axially displaced the bearing pin 21 in the drawing to the right.
  • the plate springs 26 have been pressed together and exert a clamping pressure on the plates 17, 20 of the multi-plate clutch 16 via the clamping plate 24.
  • the latching cams 34 can be released from the latching surface 33.4 of the rocker arm 29 for releasing the multi-plate clutch, so that it moves along the link surface 33 of the rocker arm 29 under the tension of the plate springs 26 up to a system slides against the first locking surface 33.2 of the link surface 33 of the rocker arm 29.
  • the bearing pin 21 can move back to the left in the drawing until the disc springs 26 relax and the frictional engagement of the lamellae is released.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (5)

  1. Chaise, en particulier chaise de bureau, comportant un dossier réglable en continu dans sa position inclinée vers une surface d'assise et précontraint dans l'une de ses positions de fin de course, qui est maintenu dans ses positions inclinées par un accouplement à lamelles à friction (16), qui comporte au moins un ressort de tension (26) agissant sur les lamelles (17) et qui est actionnable au moyen d'un levier de préhension placé sous la surface d'assise, ledit au moins un ressort de tension (26) étant placé concentriquement sur un boulon d'appui réglable axialement (21), traversant des fentes dans les lamelles d'accouplement (17), lequel axe forme une butée pour le ressort de tension (26), caractérisée en ce que le levier de préhension est relié à une came de déclenchement (35), qui agit sur un coulisseau (29) accouplé avec l'axe d'appui réglable axialement (21), qui présente un évidement d'encliquetage pour la came de déclenchement (35) au moins dans l'une de ses positions de fin de course.
  2. Chaise selon la revendication 1, caractérisée en ce que la came de déclenchement (35), reliée au levier de préhension, peut pivoter autour d'un axe fixe (36) et s'applique contre une surface profilée (33) du coulisseau, qui est configuré en levier de basculement (29), pouvant pivoter autour d'un axe fixe (31/32), en liaison d'entraînement avec le boulon d'appui réglable axialement (21).
  3. Chaise selon les revendications 1 et 2, caractérisée en ce que le levier de basculement (29) est supporté à l'une de ses extrémités, est pourvu à son autre zone d'extrémité de la surface d'application profilée (33) pour la came de déclenchement (35) et présente, entre ses deux extrémités, son point de liaison d'entraînement (tige transversale d'entraînement 28) avec le boulon d'appui réglable axialement (21).
  4. Chaise selon l'une des revendications 1 à 3, caractérisée en ce que la came de déclenchement pivotante (35) présente un ergot d'encliquetage (34), qui dans les deux positions de fin de course de la came de déclenchement, coopère chaque fois de manière autobloquante avec une surface d'encliquetage (33.2, 33.4) de la surface d'application profilée (33) du levier de basculement (29), qui présente, entre ses surfaces d'encliquetage (33.2, 33.4), une surface de glissement (33.3) oblique, menant au mouvement de basculement du levier de basculement (29).
  5. Chaise selon l'une des revendications 1 à 4, caractérisée en ce que le palier de pivotement du levier de basculement (29) est constitué d'une coquille d'appui ouverte (rainure 32), dans laquelle le levier de basculement (29) s'engage de manière adaptée avec une saillie d'appui (languette 31) présentant une section transversale en partie circulaire.
EP93116763A 1992-10-20 1993-10-16 Chaise, notamment chaise de bureau Expired - Lifetime EP0594094B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4235247 1992-10-20
DE4235247A DE4235247C1 (de) 1992-10-20 1992-10-20 Stuhl, insbesondere Bürostuhl

Publications (2)

Publication Number Publication Date
EP0594094A1 EP0594094A1 (fr) 1994-04-27
EP0594094B1 true EP0594094B1 (fr) 1996-06-19

Family

ID=6470826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93116763A Expired - Lifetime EP0594094B1 (fr) 1992-10-20 1993-10-16 Chaise, notamment chaise de bureau

Country Status (4)

Country Link
EP (1) EP0594094B1 (fr)
DE (2) DE4235247C1 (fr)
ES (1) ES2088621T3 (fr)
NO (1) NO933757L (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19751598B4 (de) † 1997-11-21 2008-04-17 Hauni Maschinenbau Ag Verfahren und Vorrichtung zum Behandeln eines Filtertowstreifens
FR2837270B1 (fr) * 2002-03-12 2004-10-01 Trefimetaux Tubes rainures a utilisation reversible pour echangeurs thermiques
ITPD20030224A1 (it) * 2003-09-25 2005-03-26 Armet Spa Dispositivo di regolazione a piastre di frizione, in particolare per sedie, poltrone o simili e procedimento per la sua realizzazione

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB401718A (en) * 1932-05-18 1933-11-20 Leabank Mfg Company Ltd Improvements relating to chairs and like seats
US3127788A (en) * 1960-12-29 1964-04-07 Anderson Co Position-retaining device
DE2927377C2 (de) * 1979-07-06 1983-12-08 Steifensand Sitzmöbel- und Tischfabrik Inh.: F. Martin Steifensand, 8501 Wendelstein Sitzmöbel, insbesondere Bürodrehstuhl
DE9211244U1 (fr) * 1992-08-21 1992-10-29 Dauphin Friedrich W Gmbh

Also Published As

Publication number Publication date
NO933757L (no) 1994-04-21
DE4235247C1 (de) 1994-03-10
NO933757D0 (no) 1993-10-19
DE59303008D1 (de) 1996-07-25
ES2088621T3 (es) 1996-08-16
EP0594094A1 (fr) 1994-04-27

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