1.Summary description: The main body is composed of TPU nylon meltblown fabric, high-density plastic frame and one-way air intake valve. It has solved the problem of achieving automatic gas filling in just 3 to 7 seconds without the need for high-pressure gas cylinders. Inflation principle: With the support of the ring-shaped skeleton, both ends are stretched to create a negative pressure inside. Air enters the interior from the outside through the one-way air intake valve to achieve automatic inflation. 2. Design Background and Purpose: Drowning accidents have always been a major global public health issue. In recent years, floods have occurred frequently. Traditional lifebuoys have limited their popularity due to factors such as unportability, slow inflation, complex operation, and high cost of replacing parts. Rescue forces represented by public security organs and ordinary people urgently need a multi-functional, portable, emergency life-saving buoy, preferably suitable for vehicles. This lifebuoy has solved all the pain points and created the most suitable emergency lifebuoy for car equipment.The airbag and the frame are combined, and the technical effect of transforming active inflation into active inhalation is achieved by using the principle of negative pressure aerodynamics. This breaks the traditional mindset in lifebuoy design that all airbags need to be inflated actively, and it is a global first.1.Safety: The TPU nylon meltblown fabric is scratch-resistant and wear-resistant. The high-frequency welding process and one-way intake valve ensure safety and no air leakage. High-pressure gas cylinders are no longer necessary accessories. 2. Healthiness: All lifebuoys are made of green and recyclable materials, in line with the concept of harmonious coexistence between humans and nature. 3. Ease of use: There are two inflation methods. One is for adults to inflate by stretching both ends with both hands. The other is for the elderly and children who are weak or have short arms. They can step on one end and lift the other end with both hands to inflate. Both wearing methods only require a snap-on connection. The waist-hugging wearing method ensures safety, firmness and no detachment when used in water, while the crossbody wearing method is suitable for rescue personnel such as police to free their hands to carry supplies during floods.1.Pure mechanical design: The main body is composed of TPU nylon meltblown fabric + high-density plastic frame + one-way air intake valve. It has solved the practical effect of achieving automatic gas filling without the need for high-pressure gas cylinders. 2. High portability: Firstly, it is small in size. When inflated, it takes on a long, double-cone shape with a thicker middle and thinner ends, which can be interlocked. When stored, it has a diameter of 14cm and a thickness of 3cm, resembling the size of a palm. Secondly, it is light in weight, approximately 250g, as light as a mobile phone. 3. Fast inflation: It only takes 3 to 7 seconds to complete automatic inflation. Inflation principle: With the support of the ring-shaped keel, both ends are stretched to create a negative pressure inside. Air enters the interior from the outside through a one-way air intake valve to achieve automatic inflation. 4. Multi-functional integration: The storage bag comes with a window-breaking device. The clasp comes with a survival whistle. The open end is the vehicle-mounted warning reflective cone. Multiple lifebuoys are connected by clips to form rescue ropes. Two lifebuoings combined with wooden boards can be used to make a water stretcher.All materials are made of green, environmentally friendly and recyclable materials. It discards external inflation devices such as high-pressure gas cylinders or air pumps, causing no pollution to the environment. Both the elderly and children can handle it with ease. It is suitable for private cars and easy to promote and popularize.