Patent ID: 7172250
Filing Date: 2007-02-06
Classification: A47C

Abstract:
1. An adjustable chassis for a chair, comprising a base member, a support member, and two support levers, wherein: the base member includes a housing having two sides each formed with a first pivot hole and a second pivot hole, a socket mounted in the housing, a bracket mounted on the socket, a drive lever pivotally mounted on the bracket and having an end drawn and moved by a first wire, a fixing seat mounted in the housing, a receiving seat mounted on the fixing seat, an inverted T-shaped locking plate movably mounted in the receiving seat and drawn and moved by a second wire; the support member includes a board having two sides each formed with a pivot bore pivotally mounted on the first pivot hole of the housing of the base member by a pivot shaft and each formed with an elongated hole, and a locking seat fixed on a bottom of the board and formed with a plurality of locking grooves; the locking plate of the base member is detachably locked in either one of the locking grooves of the locking seat of the support member, so that the support member is fixed on the base member; each of the support levers has a first pivot hole pivotally mounted on the second pivot hole of the housing of the base member and a second pivot hole pivotally mounted on the elongated hole of the board of the support member, so that each of the support levers is pivotally mounted between the housing of the base member and the board of the support member.