SELF-OPENING UMBRELLA

摘要

An improvement in self-opening umbrella frames having either a one-piece or telescopic stick and a main slide and an auxiliary slide on the stick to operate a frame-rib structure which is opened automatically by a coil spring compressed between these two slides; the fame-rib structure being closed by pulling down on a tubular grip sleeve journaled for rotation on the stick and extending through the two slides, the grip sleeve having an upper abutment or carrier engaged at the top of the auxiliary slide; the grip sleeve being locatable about a 360.degree. circumference by an arresting catch on the umbrella handle at the lower end of the stick; torsional forces generated by the coiled spring during expansion and compression being isolated between the slides and not interfering with operation of the arresting catch while minimizing opening and closing effort of a user of the umbrella.