Pulling string structure for automatic open close umbrella

• Main Author: ZHANG, SHU-MIN
• Format: Patent
• Language: Chinese; English
• Published: 01.01.2012
• Subjects: HAND OR TRAVELLING ARTICLES; HUMAN NECESSITIES; LADIES' OR LIKE FANS; UMBRELLAS; WALKING STICKS

The invention relates to a pulling string structure for an automatic open close umbrella. The pulling string structure at least includes two pulling strings, one is the primary string and the other is the secondary string. One edge of the secondary string connects to a lower nest. The other edge of the secondary string passes through an upper nest or a pipe affixed with the upper nest and is fixed on the primary string. One edge of the primary string passes through a central rod section pipe capable of moving with respect to the upper nest. The other edge of the primary string connects an extending part arranged within the umbrella head. When the umbrella is opened, an umbrella opening spring is extended and the primary string and the secondary string work together to pull the other section pipes of the central rod. The central rod will be opened and the lower nest will be moving upwardly to expand the ribs to open the umbrella. When the umbrella is closed, the lower nest is moving downwardly because of the s