Patent ID: 6234186
Filing Date: 2001-05-22
Classification: A45B

Abstract:
An improved canopy frame for umbrella, comprising:a main shaft (10), an upper slide notch (20), a lower sliding notch (30), an equal number of:positioning ribs (40), upper spreaders (41), upright ribs (42), upper clamps (50), lower spreaders (60), and clamping pieces (70); anda fixed notch (11) at a top of the shaft 10, a pair of positioning holes for engaging said upper sliding notch (20) and said lower sliding notch (30), said fixed notch (11) being secured to a top end of said main shaft (10); said upper sliding notch (20) and said lower sliding notch (30) being consecutively mounted below said fixed notch (11);wherein a first end of each of said positioning ribs (40) is rotatably engaged to said fixed notch (11) and a second end thereof is fixed to one of said upper angle-forming clamps (50); a first end of each said upper spreaders (41) is engaged to said upper sliding notch (20) and a second end thereof is rotatably engaged to a first hinge point of said one of said upper angle-forming clamps (50); a first end of each of said upright ribs (42), is rotatably engaged to a second hinge point of said one of said angle-forming clamps (50); one of said clamping pieces (70) is fixed to a midsection of each said upright ribs, each of which extends away from said one of said clamping pieces (70) toward a second end of each of said upright ribs (42); a first end of each of said lower spreaders (60) is rotatably engaged to said lower sliding notch (30) and a second end thereof rotatably engaged to a hinge point of said one of said clamping pieces (70); wherein when the upper notch (20) and the lower notch (30) are respectively engaged in said positioning holes, said lower spreaders stretch said upright ribs outwardly in a slant manner, and a canopy mounted to the frame forms an umbrella.