CA2307519A1 - Canopy frame for umbrella of various shapes - Google Patents

Abstract

A canopy frame for umbrella has a structure adapted for various shapes, making the appearance of umbrellas dexterous and interesting. The frame has a main shaft, an upper sliding notch, a lower sliding notch, multiple positioning ribs, multiple upper spreaders, upright ribs, upper angle-forming clamps, auxiliary stretchers, lower spreaders and multiple clamping pieces. Two positioning holes are on the main shaft for the fixing of the upper and lower sliding notch and at the top end of the main shaft is disposed the fixed notch. The upper and lower sliding notch mounted consecutively on the main shaft under the fixed notch. One end of each positioning rib is connected to the fixed notch and the other end is associated with an upper angle-forming clamp. One end of each upper spreader is fixed to the upper sliding notch and the other end is engaged with the middle hinge point of the upper angle-forming clamp. One end hinge point of each angle-forming clamp is coupled to one end of each upright rib to which is mounted a clamping piece at the other end. The upright rib has a hinge projection at one end to which one end of each auxiliary rib is connected and the other end is fixed to an end hinge point of a lower angle-forming clamp, and each lower angle-forming clamp is associated with a folding rib. Thereby when a canopy is mounted to the frame, umbrellas of various shapes can be obtained.