Patent ID: 7427099

Claim:
A safety device for a folding chair, the safety device being mountable on a bottom of a seat and one of a plurality of rear legs, and comprising: a base comprising a fixing plate mountable on an inner side of the rear leg, two side walls perpendicular to the fixing plate, and a receiving groove formed between the fixing plate and the side walls; a handling piece disposed inside of the receiving groove, pivotally connected with the side walls, and comprising a hook and a pressing portion, and being rotatable about pivot points where the handling piece is pivotally connected with the side walls; a pair of casings, each casing comprising an enclosing portion and a fixing portion, with the two enclosing portions for enclosing both sides of the rear leg and the fixing plate of the base, and the fixing portions of the casings being fixed together; and a retaining piece mountable on the bottom of the seat, and comprising a retaining hole to engage with the hook of the handling piece, thereby securely connecting the seat with the rear leg.