Patent ID: 8567422

Claim:
An umbrella, comprising: a shank which includes an outer tube with a handle being secured to a lower side thereof, and an inner tube which is secured to an inner side of the outer tube and has a stopper protrusion at its intermediate upper portion; an auxiliary rib fixing member and a main rib fixing member which are installed at the upper sides of the outer tube and the inner tube, respectively; a rib assembly which includes a plurality of auxiliary ribs and a plurality of main ribs which are rotatably assembled to the auxiliary rib fixing member and the main rib fixing member, respectively; elongated operation holes which are elongated in upward and downward directions at an upper side of the handle and are opposite to each at the outer tube; an operation handle which ascends and descends along an outer portion of the outer tube and is assembled to the inner tube via the elongated operation holes by a pin; an operation button which is installed at the handle and are elastically supported by a spring and includes an engaging protrusion which is inserted into a second operation hole formed at a lower side of the outer tube; and engaging holes and which are formed at the portions matching with the upper dead point and the lower dead point between which the inner tube ascends or descends, below the operation handle, with the engaging protrusion formed at the operation button being selectively secured.