The principle of opening and closing an automatic umbrella and how to use it

   Umbrellas are a necessity in life, especially in the rainy season, a handful of that is of course, so the market demand for umbrellas is very large, umbrellas can block ultraviolet light shade, umbrellas can block the rain and snow, we use the sun umbrellas and umbrellas every day, almost all manually to open and close, for the automatic umbrella, and what is it? How do you use them?

      The automatic principle of the automatic umbrella is a two-section folding umbrella, extending the first section to do positive work, extending the second section to do negative work, but the energy of this negative work is slightly less than the first section, it can be opened automatically, then when you press close, only the first section is closed, this time also positive work, the last section is retracted manually, but then the umbrella has been put away.
      The automatic umbrella consists of a centre tube (1), an upper nest (2), a spring (3), a movable nest (4) and a control block (5). It uses a stretchable spring (3) in the middle tube (1) to store energy when the umbrella is closed and to release the energy to open the umbrella automatically when it is unclipped.

The fully automatic umbrella is actually an innovative umbrella. It's a one-touch retract and release.