Central shaft control structure of self-opening/closing...

Details Central shaft control structure of self-opening/closing... Central shaft control structure of self-opening/closing...

2011-07-05

2011-07-05

Yip, Winnie (Department: 3636)

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

C135S022000, C135S025300

Reexamination Certificate

active

07971595

ABSTRACT:
A central shaft control structure is provided for a self-opening/closing umbrella and is arranged in a handle of the umbrella for self-opening/closing of the umbrella, including a safety device composed of a reversal prevention wheel having a toothed surface, an operation bar comprising a pawl, and a barrel fit over the operation bar. The reversal prevention wheel comprises a safety rope wrapped therearound and having an end fixed to a third central shaft segment. When errors occur in the course of compression in closing the umbrella, the central shaft that is being compressed can be held in position, so that instantaneous spring back of the central shaft caused by an umbrella opening spring that is in a compressed condition can be prevented to ensure safety of operation and control of the self-opening/closing umbrella.

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