SELF-OPENING AND SELF-CLOSING UMBRELLA

• Main Author: YOSHIHARA S,JA
• Format: Patent
• Language: English
• Published: 04.09.1973
• Subjects: HAND OR TRAVELLING ARTICLES; HUMAN NECESSITIES; LADIES' OR LIKE FANS; UMBRELLAS; WALKING STICKS

Self-opening and self-closing umbrella which has a hollow stick, a top hub member secured to the top of the stick to pivotally support a plurality of main ribs, a lower hub member slidably mounted on the stick, an intermediate hub member slidably mounted on the stick between the top hub member and the lower hub member, a plurality of auxiliary ribs each pivotally engaged at one end to the intermediate hub member and at the other end to the intermediate portions of the main ribs, a plurality of stays each pivotally engaged at one end to the intermadiate portions of the main ribs together with the auxiliary ribs and at the other end to the lower hub member, a resilient engaging member having an engaging projection and a laterally-projecting stud integrally formed thereto for engaging the lower hub member upon closing of the umbrella, an operating lever movably inserted into the stick so that the top thereof projects when the umbrella is closed from the intermediate hub member, a coil spring disposed in the stick secured at one end to the intermediate hub member and at the other end to a predetermined portion of an operating lever so that when the top of the operating lever is depressed into the stick, the lower end of the operating lever is removably engaged to the lower end of the stick wherein the length of the coil spring upon opening of the umbrella is equal or longer than that of the umbrella upon closing of the umbrella, and a plurality of springs each secured at one end to the pivotal points of the auxiliary ribs and stays and at the other end to the lower hub member for providing an opening force of the main ribs.