Abstract: An improved umbrella frame comprises a stick having an upper sleeve which has an upper nest set on the topside thereof being installed on the stick. And below the upper sleeve, the stick is further installed a mid runner and a lower runner between which a spring is set. A pluralities of long ribs are radiated around the nest and each of which have a first end pivotally connected thereto. A plurality of short ribs are radiated around the mid runner and each of which have a firs end pivotally connected thereto, and a second end pivotally connected to the long ribs. Wherein, the short ribs are made of fiber material and are formed in a solid rectangular shape with the lateral edge being longer than the top and bottom edge.

Abstract: The umbrella has a frame composed of a plurality of ribs, stretchers and a combined panel consisting of a main panel and a secondary panel, wherein, the area of the main panel is smaller than that of the fully expanded ribs of the frame, and the inner edge of the secondary panel matches the outer edge of the main panel. The main and secondary panels concentrically cover the frame, and a plurality of ropes are mounted between the inner edge of the secondary panel and the frame, which are used to increase spaces between the outer edge of the main panel and the inner edge of the secondary panel, and moreover, improve efficiency of air convection, save panel material and simplify manufacturing procedures.

Abstract: A linkage device for an umbrella includes a pivot and a joint. A frame having an opening defined therein is integrally formed on a periphery of the pivot. A deformable leaf is provided to the joint and has a configuration to mate with a recess defined in the joint. Furthermore, a pivot rod is provided to the joint and functions as a pivot when the stretchers and the ribs are expand or folded. Therefore, when a portion of the frame is received within the joint, the deformable leaf is able to securely enclose the portion of the frame within the joint.

Abstract: A structure which is easy to be assemble and can firmly combine a rib with a stretcher of an umbrella is disclosed. The structure comprises a fastening and a link. The fastening has a body defining a passage for receiving a rib of the umbrella and a locating piece integrally extending from an outer periphery of the body. The locating piece defines a slot perpendicular to and in communication with the passage. The link has a block. The block defines a front end and a rear end, a first plate integrally extending outwardly from a bottom of the front end, a second plate integrally extending outwardly and upwardly from a top face thereof at the front end, and a pipe integrally extending from the rear end thereof for receiving a stretcher of the umbrella. The block further defines two concave side walls extending between the front end and the rear end thereof to conform with the outer periphery of the body.