Patent ID: 7780418

Claim:
A quick assembly blade for a ceiling fan comprising: a blade frame formed integral with a fixed portion; a neck portion; a blade-connecting portion; said blade-connecting portion being provided with a holding surface facing upward; said holding surface having its circumference being fixed with three studs spaced apart equidistantly; said three studs being respectively bored with a threaded hole in the center; said threaded hole being secured therein with a fastener; said fastener being formed with a head to be engaged; a blade having one end being secured on said blade frame; said blade being bored with insert holes at locations corresponding to said studs of said blade frame; a clamping member being fixed on said blade at a location corresponding to said blade frame; said clamping member being formed with a plate-shaped clamping portion; said clamping portion having one edge cut with two notches and having their openings respectively facing two adjacent said fasteners; said clamping portion having another edge being extended and formed with an elastic engage portion; said elastic engage portion being bored with a positioning hole matching with said fastener below; said positioning hole is smaller than said fastener below; said positioning hole having its circumference annularly cut with at least two notches spaced apart equidistantly; an elastic engage strip being formed between said notches; said elastic engage portion of said clamping member is annularly bored with four elongate notches; and said positioning hole and said four elongate notches are formed into a cross shape.