Patent ID: 7604299
Filing Date: 2009-10-20
Classification: A47C

Abstract:
1. A backrest assembly comprising: a frame made of rigid material and including an annular body, with the annular body including an opening extending from a front side thereof through a rear side thereof, with the annular body further including left and right sides and a bottom side, with a connecting plate being interconnected between the left and right sides of the annular body above the bottom side and delimiting the opening, with a plurality of supporting plates being interconnected between the connecting plate and the bottom side of the annular body, with the frame further including a seat connecting section below the plurality of supporting plates and adapted to connect with a seat of a chair, with the annular body further including a ridge extending radially outward from an outer peripheral face thereof and spaced from a front end face of the annular body, forming a ledge between the front end face and the ridge of the annular body, with the ridge including a plurality of engaging holes; a board made of flexible material, with the board including a flange formed on a rear side thereof, with the flange being mounted around the ledge of the annular body and abutting against the ridge of the frame, with the board further including a plurality of fixing holes aligned with the fixing holes of the annular ridge, with the board further including a plurality of vents extending from a front side thereof through a rear side thereof; and a plurality of fasteners extending through the engaging holes of the ridge into the fixing holes of the board.