US Patent 6873249 Luminous alarm device

A luminous alarm device comprises an illumination body, a plurality of legs, a sliding ring, a positioning toggle, and a retaining seat. One end of the leg is formed with a first buckle and another end thereof has a rib. A distal end of the rib is extended with a second buckle. The rib bends with respect to the leg. The sliding ring is mounted at an upper edge of the cylinder. A sliding ring is slidable along the cylinder. A plurality of first slots are installed at the sliding ring for buckling the first buckles. The retaining seat is firmly secured to the cylinder. An inner wall of the retaining seat is formed with a plurality of second slots for buckling the second buckles. When the sliding ring slides along the cylinder, the legs will be folded or expanded so as to use or store the luminous alarm device.