Patent ID: 8365747

Claim:
A shaft of automatic umbrella, wherein the umbrella comprises a handle and an operation and control unit that is received in the handle and comprises a push button and a control ring that comprises a control bar and a projecting bar, a shaft assembly comprising a first shaft section, a second shaft section, and a third shaft section telescopically received in each other, a top cap fixed to a top end of the third shaft section, a runner movably fit over the shaft assembly, a bullet-like member arranged inside the shaft assembly, an expansion spring, and a plurality of ribs that is coupled between the top cap and the runner and each comprises a collapse spring; the improvement comprising that the shaft assembly is structured to comprise an internal plug received and fixed inside a top portion of the second shaft section and an inner tube received in the second shaft section and having a top end fixed to the internal plug, the internal plug having a top end to which an end of a runner cable is attached, the runner cable having an opposite end extending upward and wrapping around a pulley arranged inside the top cap to extend outward for attaching to a top end of the runner, the inner tube receiving therein an operation tube that has a top end fixed to a bottom of the top cap, the operation tube having a bottom end that is fit into and fixed to an operation plug in which a through hole and a fixing hole are formed, the inner tube having a top portion receiving and retaining therein a pulley around which an operation cable wraps in such a way that an end of the operation cable extends through the through hole to attach to a top of the bullet-like member and an opposite end is received and fixed in the fixing hole to attach to the operation plug.