Abstract: An umbrella is expanded by spring action and collapsed by spring action. Both spring actions are initiated by a single push button which is manually manipulated in the same manner for initiating both spring actions.

Abstract: A full-automatic umbrella operable single-handedly by means of a single control device is provided with a tube having a handle at the lower end thereof, an outer tubular shaft mounted on the upper end of said tube and provided with an intermediate ring at the top thereof, an upper inner shaft inserted in the upper end of said outer tubular shaft and provided with an upper ring at the top thereof, a sliding member mounted over said outer tubular shaft and provided with a lower ring at the upper end thereof, a rib assembly collapsibly and pivotably connected to said upper, intermediate and lower rings, a control device disposed in said stick and being operable to control the opening and collapsing of the umbrella through said control means, a coil spring adapted for closing the umbrella mounted in between said intermediate and lower rings, and two coil springs adapted for opening of the umbrella mounted separately in the upper and lower portions of said stick.

Abstract: An umbrella automatically openable and closable by a single push-button operation. The umbrella comprises an outer tubular shaft having a lower ring fixed on the upper end thereof; an intermediate tubular shaft slidably inserted in the outer tubular shaft and having an intermediate ring on the upper end thereof; an upper inner shaft slidably inserted in the upper end of the intermediate tubular shaft and having an upper ring fixed on the upper end thereof; a lower inner shaft slidably inserted in the lower end of the intermediate tubular shaft and having on the lower end thereof a grip, operably mounted thereinside a first spring pawl attached with a push button on the lower end thereof and a second spring pawl; a first spring means fitted over the intermediate tubular shaft in between the intermediate ring and the lower ring; and a second spring means mounted inside the intermediate tubular shaft in between the upper inner shaft and the lower inner shaft.