Chair with seat depth adjustment and back support

摘要

An office chair including a linking mechanism between a movable chair seat and a pivotable chair back. The mounting arrangement between the chair back and the chair seat includes swing arm assembly that is pivotally connected to the chair seat. When the chair seat moves forward, the swing arm assembly moves with the chair seat and causes the chair back to pivot and move relative to a stationary support arm. The stationary support arm includes a curved support face that moves within a movement slot formed on the swing arm assembly. The movement slot includes a roller that helps guide relative movement between the two components. The chair seat includes a thigh support portion that allows the user to adjust the seat depth as desired.

主权项

1. A chair comprising:
a seat base; a seat pan movable along a longitudinal axis relative to the seat base; a swing arm assembly pivotally mounted to the seat pan and movable with the seat pan relative to the seat base, the swing arm assembly including a swing arm extending from a first end positioned on a first side of the seat pan to a second end positioned on a second side of the seat pan; a chair back securely mounted to the swing arm, wherein both the first and second ends of the swing arm extend laterally outward past an outer perimeter of the chair back; a support bar mounted to the seat base and including an elongated curved support face that contacts the swing arm at the center of the swing arm between the first end and the second end to support the swing arm assembly, wherein reclining movement of the chair back causes the swing arm to move along the elongated curved support face of the support bar; and a roller positioned on the swing arm, wherein the roller engages and moves along the curved support face during reclining movement of the chair back.