Patent ID: 7293833
Filing Date: 2007-11-13
Classification: A47C

Abstract:
1. A chair comprising: a seat; a base, wherein said base supports said seat from below; a backrest, wherein said backrest is attached to said base by a back support unit that allows said backrest to tilt backward to provide a backward tilt; and a spring means, wherein said spring means elastically supports said backward tilt of said back support unit and said backrest; wherein said spring means expands and contracts in a back and forth direction when viewed from above; wherein said spring means is supported by a forward portion of said base, and wherein said spring means activates when a rearward load is applied from said backward tilt of said backrest; wherein a rear end portion of said spring means is situated further rearward than a tilt supporting point of said back support unit; wherein said rear end portion of said spring means extends through said backrest; wherein a front end portion of said spring means is situated further below than said tilt supporting point of said back support unit; and wherein said spring means is allowed to tilt together with said backrest and said back support unit centering around a support portion in relation to said base.