Umbrella frame

Abstract

An umbrella frame has a main shaft and multiple branches pivotally attached around the main shaft. The main shaft has an immovable upper base and a movable lower base each having multiple retaining slots. Each branch is divided into a front section, a middle section and a rear section and has a supporting rib and a pulling rib both pivotally attached under the front section. Improvement of the umbrella frame is that the upper and lower bases respectively have multiple rectangular recesses individually and pivotally engaged pin heads on the front section or the supporting rib of each branch. Thereby, the umbrella frame is be quickly assembled or disassembled.

Description

[0001] This is a continuation-in-part (CIP) of U.S. patent application Ser. No. 11 / 162,314, filed on Sep. 6, 2005, which is incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to an umbrella frame, and more particularly to an umbrella frame that is convenient in assembly or disassembly. [0004] 2. Description of Related Art [0005] With reference to FIGS. 12 and 13, a conventional umbrella frame is composed of a umbrella shaft 1, a retainer 2 mounted at a top of the umbrella shaft, multiple ribs 3 radially attached to the retainer 2, and multiple stretchers 4 corresponding attached to the multiple ribs 3 and a runner mounted on the umbrella shaft 1 to collect all inner ends of the stretchers 4. The retainer 2 mounted on the top of the umbrella shaft 11 equally attaché inner ends of the ribs 3 with same intervals. Moreover, each stretcher 4 is attached to a middle of a corresponding rib 3. The runner 5 also ...

AI Technical Summary

Benefits of technology

[0009] A main objective of the present invention is to provide an umbrella frame that has pin heads individually formed on branches and support ribs and has multiple corresponding retaining slots defined in a upper base and a lower base to respectively and pivotally engage the pin heads so that the conventional metal wire is eliminated and the umbrella frame is simplified to make assemble or disassembly quick without using specific auxiliary machines.

[0023] By having a structure described above, the umbrella frame can be operated conveniently, quickly and stably and has excellent deforming-resistance to make the umbrella frame durable.

Problems solved by technology

However, combination the runner 5 and the multiple stretchers 4 is achieved by manpower and time-consuming and thus causes tremendous manufacturing cost.

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