Patent ID: 8087730

Claim:
A backrest for a chair, comprising a wood rest board having a left edge and a right edge, the left edge and the right edge being fixedly connected to a left plastic fastener and a right plastic fastener respectively, wherein the left plastic fastener has a connecting piece fixedly connected to a left rest staff and the right plastic fastener has connecting piece fixedly connected to a right rest staff, wherein the wood rest board comprises an upper piece and a lower piece positioned parallel to each other; the right side of the left plastic fastener extends rightwards to form two left flanges, an arc-shaped gap positioned between the two left flanges; the left side of the right plastic fastener extends leftwards to form two right flanges, an arc-shaped gap positioned between the two right flanges; wherein two edges of the upper piece are fixed on the upper left flange and the upper right flange; and two edges of the lower piece are fixed on the lower left flange and the lower right flange.