| 摘要 |
A self-opening/closing umbrella comprises a handle, an outer tube, a middle tube partially mounted in the outer tube and including a lower end securely attached to the handle and an upper end in the outer tube, and an inner tube partially mounted in the middle tube and including a lower end in the middle tube and an upper end extending beyond the middle tube and the outer tube. A rib-mounting base is securely mounted to the upper end of the inner tube to move therewith. A stretcher-mounting runner is securely mounted to the upper end of the outer tube to move therewith, the runner being slidably mounted around the inner tube. A compression spring is attached between the runner and the upper end of the middle tube. When an opening button is pushed, the runner and the outer tube are moved upward under a first stage of extension of the compression spring, thereby opening the umbrella. When the closing button is pushed while the umbrella is in the open state, the base and the inner tube are moved upward under a second stage of extension of the compression spring, thereby closing the umbrella.
|
