Patent ID: 6918399

Claim:
An automatic umbrella including a shaft and a runner connecting with a frame having main ribs and second ribs, the inner end of the main rib being connected with an upper joint on the shaft, the second rib connected between a middle joint and the main rib, a U-shape spring being received in the shaft and a handle being connected with a lower end of the shaft; and the characteristic is to provide a plastic elastic frame connected between the runner and the second rib, the plastic elastic frame includes a ring-base and several parallel elastic branch ribs with several gaps being formed in a same interval between adjacent elastic branch ribs, each elastic branch rib has a hole at its top end to receive the second rib while each second rib connects with a tube at an inner end of the second rib and the diameter of the tube is larger than the hole of the elastic branch rib; the runner provided with an inner coil spring extending between the middle joint and the runner, the runner having several engaging projections in interval at its top end, while connecting the runner and the elastic frame, each engaging projection of the runner is inserted into and engaged with a related gap between two adjacent elastic branch ribs to retain the base-ring with the runner and assemble the runner and the elastic frame becoming a single body firmly.