Automatic umbrella principle:
A compression spring sleeve is arranged outside the umbrella mouth compression spring, and the compression spring sleeve is sleeved in the skeleton connecting sleeve; A radial clamp is arranged on the skeleton connecting sleeve; The two ends of the clip are wedge-shaped and can slide left and right; The outer side of the skeleton connecting sleeve is provided with a spring bolt; An inner sleeve and an outer sleeve with a sliding multi-thread spiral are arranged above the umbrella handle, and a matching multi-thread is arranged between the inner sleeve and the outer sleeve; When the umbrella is closed, the sliding outer sleeve and the inner sleeve can extend out of the compression spring to compress the umbrella opening, and when in place, the clip on the skeleton joint can open the umbrella.
The spring umbrella retracting device can be an umbrella retracting compression spring between the umbrella top frame connector and the umbrella opening frame connector. When the umbrella-opening compression spring is pressed, the umbrella-opening compression spring can be opened and compressed, the spring bolt is pulled down, the clip slides out, the umbrella-opening compression spring closes the umbrella, and the sliding spiral sleeve is rotated to compress the umbrella-opening compression spring and prepare to open the umbrella.
Extended data:
Disadvantages of fully automatic umbrella
1, with limited size. At present, fully automatic umbrellas are all three-fold umbrellas. The advantage of the tri-fold umbrella is that it is small and light, so the fully automatic tri-fold umbrella is generally not particularly large.
2. The structure is complicated and heavy. Compared with manual umbrella and semi-automatic umbrella, the keel, pole and switch mechanism of fully automatic umbrella are much more complicated. In addition, the automatic folding function needs the support of energy storage spring, which is far more complicated than manual umbrella in structure and weight, and obviously cannot be compared with manual umbrella and semi-automatic umbrella in compactness and portability.
3, easy to open but difficult to collect. In the process of opening the umbrella, the strong spring in the middle of the umbrella pole will release more force, which will lengthen the spring between the keels responsible for collecting the umbrella. When retracting the umbrella, just use the button to trigger the spring, and the umbrella surface can be retracted. Because the energy storage spring in the handle is thick and powerful, it is necessary to manually retract the umbrella pole to store energy for the spring after the umbrella surface is retracted. This process requires both hands to have a certain strength, and delicate ladies and children may find it a little difficult to use it.