Kippmechanismus für einen Stuhl

A chair tilting mechanism

Mécanisme à bascule pour chaise


A chair mechanism (1) has a seat support (11) and a backrest support (50) which can pivot about pins on a fixed support (2). They are interconnected so that their tilting is synchronised. A lock (30) locks the seat support (11) at a certain tilt position with respect to the fixed support (2) and therefore in turn locks the backrest support. The lock (30) has lock members (36, 37) with ridges or teeth which interengage to provide positive mechanical locking. The teeth are configured so that tilt bias which is provided by a bias unit (15) urges the teeth into tighter locking engagement once they are engaged. Therefore, accidental release of the actuator does not cause the lock to become released and therefore jerking actions of parts of the chair are avoided. For releasing of the lock, it is necessary for the user to urge parts of the chair against the tilt bias, thereby causing release surfaces on the teeth to slide with respect to each other to urge the locking member (37) away from the locking member (36). The slopes of the surfaces on the teeth are important as they provide for tighter mechanical engagement under the tilt bias and for disengagement when the user urges a chair part against the tilt bias.




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Patent Citations (4)

    Publication numberPublication dateAssigneeTitle
    DE-2647410-A1July 14, 1977Miller Herman IncRuecklehneneinstellvorrichtung fuer stuehle o.dgl.
    GB-2193884-AFebruary 24, 1988Chair Mechanisms LimitedA tilting mechanism for a chair
    GB-2255904-ANovember 25, 1992William John Hancock, Ashfield Eng CoChair tilting mechanism
    WO-9317602-A1September 16, 1993Ashfield Engineering Company (Wexford) LimitedA chair tilting mechanism

NO-Patent Citations (0)


Cited By (11)

    Publication numberPublication dateAssigneeTitle
    CN-104605648-AMay 13, 2015安吉富和家具有限公司Synchronous different-angle base plate for backrest and cushion
    CN-104605648-BFebruary 22, 2017安吉富和家具有限公司一种靠背坐垫同步异角度底盘
    EP-1002484-A1May 24, 2000Sedus Stoll AGDevice for synchronised adjustment of a seat and backrest of a chair
    EP-1169947-A1January 09, 2002Dauphin Entwicklungs- u. Beteiligungs-GmbHChaise, notamment chaise de bureau
    US-6572191-B2June 03, 2003Dauphin Entwicklungs- U. Beteiligungs-GmbhChair, in particular office chair, having a synchronous mechanism
    US-6588843-B1July 08, 2003Ghsp, IncorporatedChair control
    US-7566099-B2July 28, 2009Lord CorporationFurniture seatback tilt recline angle limiter and method
    US-8167375-B2May 01, 2012Lord CorporationFurniture seatback tilt recline angle limiter and method
    WO-0113765-A1March 01, 2001Rabami A/SErgonomic chair
    WO-0228228-A2April 11, 2002Ghsp, Inc.Chair control
    WO-0228228-A3June 27, 2002Ghsp IncMécanisme de commande pour chaise