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EP0624328A1 - Dispositif de blocage/déblocage pour assise basculante de chaise de bureau - Google Patents

Dispositif de blocage/déblocage pour assise basculante de chaise de bureau Download PDF

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Publication number
EP0624328A1
EP0624328A1 EP94830101A EP94830101A EP0624328A1 EP 0624328 A1 EP0624328 A1 EP 0624328A1 EP 94830101 A EP94830101 A EP 94830101A EP 94830101 A EP94830101 A EP 94830101A EP 0624328 A1 EP0624328 A1 EP 0624328A1
Authority
EP
European Patent Office
Prior art keywords
tie rod
sphere
lever
blades
locking
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Withdrawn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
EP94830101A
Other languages
German (de)
English (en)
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 EP0624328A1 publication Critical patent/EP0624328A1/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Withdrawn legal-status Critical Current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
    • 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 utility model in question relates in general to office chairs with a tilting seat, and more particularly to a device for locking / unlocking the seat of these chairs.
  • the office chairs or armchairs can be made up of seat, backrest, fixed to a tilting support on a fixed element or relative to this fixed element supported by an upright or a support column.
  • the oscillations of this support, and therefore of the seat, can be prohibited by a blocking device located between the tilting support and the central body.
  • the central body has parallel blades and the locking / unlocking device is supported by the tilting support and intended to engage the latter to the central body by a stacking blocking of these blades.
  • the device normally comprises a tie rod which crosses these blades and which is displaced axially and transversely with respect to the tilting support from the locking position to the unlocking position by means of a support element against the opposite sides of the stacking of slides; a spring which tends to hold the lever normally in the locked position, and an operating lever which acts on the tie rod opposing this spring to move it into the unlocked position.
  • This invention aims, moreover, to provide a locking / unlocking device for tilting seats obtained through a new arrangement and combination of elements, with a simpler and more economical design and easier movement.
  • the device in question is practically in accordance with claim 1 which will follow. It allows to: - momentarily unlock the swing, in addition to permanent locking and unlocking, with automatic return blocked after a straightening of the seat; and - use a simple-form operating lever that can be extended forward near the tilting support for easier manual access.
  • Fig. 1 shows a plan view of a support assembly for a tilting seat complete with a locking / unlocking device
  • Fig. 2 shows a cross section of the assembly of FIG. 1 at the locking / unlocking device.
  • the reference 10 indicates a tilting support relative to the body which is equipped with several stacked blades 11.
  • the tilting support 10 supports a seat for chairs and the like which can be locked / unlocked on this stack of blades 11 at by means of a locking / unlocking device 12 which can be actuated manually.
  • This device 12 mainly comprises a fixed tie rod 13, a locking spring 14 and an operating lever 15.
  • the tie rod 13 is oriented transversely to the support 10, crosses the blades 11, being guided, on one side, in a socket 16 which rests against one side of the stack of blades 11 and which can be moved in a seat 10 ′ obtained in the tilting support 10 and, from opposite side, in a reaction sleeve 17 fixed to the tilting support 10 and provided with a bottom flange 17 'which rests against the opposite side of the stack of blades 11.
  • the tie rod 13 has on one side a nut 18 which prevents the extraction of the guide elements 16, 17 and on the other side it is provided with a head 19 turned towards the operating lever 15 and which is moves axially from the locking position to the unlocking position on the blades 11.
  • the locking spring 14 is located, precompressed, inside the sleeve 17, between the head 19 of the tie rod 13 and the bottom flange 17 'of the sleeve.
  • the spring 14 thus acts by normally moving the tie rod towards the lever 15 and keeping the sleeve 16 engaged against the stack of blades 11 which are thus blocked against the bottom 17 ′ of the reaction rod 17.
  • the operating lever 15 is located next to the tilting support 10 and comprises a control arm 15 ′ extending orthogonally to the axis of the tie rod 13 at a certain distance from the head 19 of the latter, and a grip arm 15 '' angular with respect to the control arm 15 '.
  • This control arm 15 of the lever 15 passes through the sleeve 17 and can rotate on its axis.
  • a sphere 20 in the center of a guide ring 21 fixed or integral with the reaction sleeve 17, this sphere 20 acting as a member for transmitting the commands from the lever to the tie rod .
  • the control arm 15 ′ of the lever 15 has a radial cavity 22 which defines a cam which interacts with the sphere 20 to establish the locking / unlocking positions of the device.
  • the cavity 22 when the cavity 22 is oriented towards the sphere 20, it houses part of the sphere - see FIG. 2 - which allows the tie rod 13, by the action of the spring 14, to move towards the sphere and maintain the blocking position at which the blades are compressed between the elements 16 and 17.
  • the release may be momentary and unstable if the lever arm 15 '' of the lever is moved upward, in the direction of the arrow S in FIG. 2, so as to leave the cavity 22 partially in correspondence with the sphere.
  • Such a reduced displacement can be delimited by a stop tooth 23 on the arm 15 '' of the lever 15, which interacts with a stop on the reaction sleeve.
  • the unstable condition between the sphere 20 and the cavity 22, and the reaction action of the spring 14 will allow the device to automatically return to the locked position once the manual control ( S ) on the lever is removed.

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)
EP94830101A 1993-05-14 1994-03-04 Dispositif de blocage/déblocage pour assise basculante de chaise de bureau Withdrawn EP0624328A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS930035U 1993-05-14
ITBS930035 IT231241Y1 (it) 1993-05-14 1993-05-14 Dispositivo di blocco/sblocco per la seduta oscillante di sedie per ufficio

Publications (1)

Publication Number Publication Date
EP0624328A1 true EP0624328A1 (fr) 1994-11-17

Family

ID=11345054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830101A Withdrawn EP0624328A1 (fr) 1993-05-14 1994-03-04 Dispositif de blocage/déblocage pour assise basculante de chaise de bureau

Country Status (3)

Country Link
EP (1) EP0624328A1 (it)
CA (1) CA2118762A1 (it)
IT (1) IT231241Y1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5676425A (en) * 1996-03-19 1997-10-14 R.A.M. Machines (1990) Ltd. Releasable lock forchair control mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409593A1 (de) * 1983-05-13 1984-11-15 Wiesner - Hager KG, Altheim Arbeitsstuhl
DE9211244U1 (de) * 1992-08-21 1992-10-29 Friedrich W. Dauphin GmbH & Co, Entwicklungs- und Beteiligungs-KG, 8561 Offenhausen Stuhl

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409593A1 (de) * 1983-05-13 1984-11-15 Wiesner - Hager KG, Altheim Arbeitsstuhl
DE9211244U1 (de) * 1992-08-21 1992-10-29 Friedrich W. Dauphin GmbH & Co, Entwicklungs- und Beteiligungs-KG, 8561 Offenhausen Stuhl

Also Published As

Publication number Publication date
ITBS930035U1 (it) 1994-11-14
IT231241Y1 (it) 1999-08-02
CA2118762A1 (fr) 1994-11-15
ITBS930035V0 (it) 1993-05-14

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