Patent ID: 7322371
Filing Date: 2008-01-29
Classification: A45B

Abstract:
1. A lock mechanism mounted in a large umbrella having a handle, a plurality of ribs, a plurality of spreaders, and a canopy, the lock mechanism comprising: a sliding sleeve connected to the spreaders and including a lower extension and a first aperture on a surface of the extension; a telescopic shank including a lower tube fixed in the handle, a sliding upper tube adapted to slide in the lower tube, and a lock device disposed in the upper tube; an actuation assembly including a hollow upper enlargement with the extension received therein, a transverse first opening formed on the enlargement, and a spring biased actuation member adapted to have a first predetermined portion disposed in the first aperture for locking the extension in a closed position of the umbrella, and a second predetermined portion disposed externally of the enlargement; and a spring biased rib fixing assembly disposed between the handle and the actuation assembly, the rib fixing assembly being adapted to fix tips of the ribs in the closed position of the umbrella; whereby pushing the second predetermined portion of the actuation assembly will disengage the first predetermined portion with the first aperture to unlock the extension of the sliding sleeve for sliding the sleeve upward to open the umbrella, and operating the lock device of the telescope shank will effect a subsequent multi-sectional length adjustment of the shank.