ApplicationNo./PatentNo.: 0326511
The utility model relates to a safety structure of a lifebuoy, in particular to a foldable portable lifebuoy, which is mainly characterized in that a brake seat is arranged in an air inlet seat group, a high-solubility clamp body is embedded in the brake seat, and an ejector pin is butted and positioned through a windable elastic rib of the brake seat, a spring and a compression ring are sleeved on one side of the ejector pin, and a nut is screwed on the joint seat to form compression elasticity. The air inlet seat group is fixedly arranged on the interlayer of the lifebuoy body, and a second interlayer is arranged on one side of the interlayer, and an air flow guide hole is chiseled on the second interlayer, and a flexible diaphragm body extends to one side at the end edge of the air flow guide hole. When the interlayer accidentally leaks air, the flexible diaphragm body tightly covers the air flow guide hole to achieve the effect of preventing air leakage.