Patent ID: 7188380

Claim:
A bedstead comprising: a plurality of cannular shafts each including a concave trough portion formed therein, the concave trough portions of the cannular shafts each including a waterdrop-shaped structure having a larger inner space and a smaller exterior so as to form an inner round shape space with a narrow edge on an opening area, a plurality of U-shaped connecting elements engaged into the cannular shafts and joined to the cannular shafts with bolts, a plurality of vertical shafts each including two ends, the ends of the vertical shafts each including a round hook portion, the round hook portions at one end of the vertical shafts being engaged into the concave trough portions of the cannular shafts and retained in the concave trough portions of the cannular shafts with the narrow edges of the concave trough portions of the cannular shafts, and the round hook portions at the other end of the vertical shafts being hooked with the round hook portions of the other vertical shafts, a plurality of horizontal shafts each including two ends, the ends of the horizontal shafts each including a hook, and a plurality of U-shaped members hooked to the hooks of the horizontal shafts and each including two ends, the ends of the U-shaped members each including a round hook portion, the round hook portions of the U-shaped members being engaged into the concave trough portions of the cannular shafts and retained in the concave trough portions of the cannular shafts with the narrow edges of the concave trough portions of the cannular shafts.