Secure Universal Alarm Monitor for Fall & Wandering Prevention, Yellow (Alarm only) - Works with All Secure Brand Bed, Chair and Seat Belt Sensors

everybody knows what happens in an accident if you don't wear a seat belt what you see in this accident looks really painful in slow motion modern seat belts are not just mechanisms which arrest your motion rather they cleverly allow enough movement to minimize internal injuries and help you land safely on an airbag in this video we won't just learn the working of a seat belt we will learn why modern seat belt mechanisms are designed the way they are so buckle your seat belt and let's start a design journey let's start with the simplest form of seat belt design a design using a spiral spring and seat belt webbing the center of the spiral spring is connected to a freely rotating shaft you can see how the spring tenses as you rotate the shaft the webbing is also connected to the shaft when not in use the passenger lets the webbing go and due to the tension of the spring the webbing will w