トップレス型洋傘の傘骨構造

Frame structure of topless umbrella

Abstract

(57)【要約】 【目的】 支骨を丸骨に形成してあるトップレス型洋傘 において、開傘操作初期の操作力を軽減すると共に、開 傘状態で傘布張力に基因し親骨を介し受骨に過大な力が 加わる不具合を無くす。 【構成】 支骨6の中途に、該支骨を横切る方向に沿う 仮想中心線を有するコイル部10を設けた。この支骨に より閉傘状態で傘骨に開き傾向が与えられ、開傘状態で は傘布張力により親骨5に加わる力を支骨が分担して吸 収することとなる。
PURPOSE:To build a topless type umbrella whose sub-bones are formed round, with which it is possible to reduce the operating force in the initial period of opening operation and to eliminate an inconvenience such that an excessive force is applied to a receptacle bone through a master bone resulting from the cloth spread tension in the opened condition of the umbrella. CONSTITUTION:On the way of each sub-bone 6, a coil 10 is furnished, which has a virtual center line stretching in the direction across the sub-bone. By these sub-bones. the umbrella bones are given a trend of opening in the closed condition of the umbrella, while in the opened condition of the umbrella, the force applied to the master bone 5 by the cloth spread tension can be absorbed by allowing the sub-bones to share the force.

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    US-6708704-B2March 23, 2004Youth LeeStructure for automatic opening umbrella